Phase pole and neutral pole type residual current operated circuit breaker
By setting a pivot on the neutral extreme moving contacts and brackets and increasing the contact pressure with the bracket spring, the problem of insufficient stability and reliability of the neutral extreme moving contacts in the prior art is solved, and higher contact reliability and lower mechanical wear are achieved.
Patent Information
- Application Number
- CN202421150310.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-05-24
AI Technical Summary
In the existing phase-pole plus neutral pole residual current operation circuit breakers, the final pressure and mechanism reset force of the neutral pole-moving contacts rely on the same spring, which is insufficient stability and complex structure, resulting in difficult assembly and poor reliability.
Both the bracket and the neutral extreme movable contact are arranged on the pivot. The contact part of the neutral extreme movable contact is pushed by the bracket spring to press the contact part on the neutral extreme static contact, increasing the contact pressure, and driving the bracket to rotate through the driving rod to achieve contact and separation of the neutral extreme movable contact.
It improves the contact reliability between the neutral extreme moving contact and the static contact, reduces mechanical wear, and simplifies the structure of the circuit breaker, improving overall stability and reliability.
Smart Images
Figure CN222914702U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a phase-pole plus neutral-pole type residual current operated circuit breaker. Background Art
[0002] The phase-pole plus neutral-pole residual current operated circuit breaker includes a phase pole and a neutral pole, and the phase pole and the neutral pole are respectively provided with a phase pole operating mechanism and a neutral pole mechanism, and the neutral pole mechanism is used to drive the phase pole operating mechanism to unlock when leakage occurs. However, the final pressure and mechanism reset force of the neutral pole moving contact of the existing neutral pole are controlled by the same tension spring, which is not stable enough. In addition, the structure of the neutral pole moving contact is complex, which makes assembly difficult, and a triangular through hole needs to be opened in the middle of the neutral pole moving contact, resulting in poor reliability of the moving contact. Summary of the invention
[0003] The utility model aims to overcome at least one defect of the prior art and provide a phase-pole plus neutral-pole type residual current operated circuit breaker.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A phase-pole plus neutral-pole residual current operated circuit breaker comprises a housing and a phase pole and a neutral pole respectively arranged in the housing, wherein a partition is provided between the phase pole and the neutral pole of the housing.
[0006] The phase pole includes a phase pole operating mechanism, a phase pole moving contact, a phase pole static contact and a phase pole handle, and the phase pole handle drives the phase pole moving contact to contact and separate with the phase pole static contact through the phase pole operating mechanism;
[0007] The neutral pole includes a neutral pole moving contact, a neutral pole static contact, and a driving rod, and the driving rod is connected between the neutral pole moving contact and the phase pole operating mechanism of the phase pole.
[0008] The neutral pole is provided with a bracket, a neutral pole moving contact and a bracket spring. The bracket and the neutral pole moving contact are respectively rotatably arranged on a pivot. The two ends of the bracket spring are respectively connected to the bracket and the neutral pole moving contact.
[0009] One of the bracket and the neutral pole moving contact is provided with a push rod, and the other of the bracket and the neutral pole moving contact is provided with a pushing part cooperating with the push rod. When the push rod of the bracket contacts the pushing part, the phase pole operating mechanism drives the bracket to rotate around the pivot through the driving rod, and the bracket drives the neutral pole moving contact to rotate around the pivot to contact and separate from the neutral pole static contact. When the neutral pole moving contact contacts the neutral pole static contact, the bracket spring pushes the neutral pole moving contact to be pressed against the neutral pole static contact.
[0010] Preferably, when the switch is closed, the phase pole operating mechanism pushes the bracket through the driving rod, so that the bracket drives the neutral pole moving contact to rotate around the pivot until the contact portion on the neutral pole moving contact contacts the neutral pole static contact. After the contact portion of the neutral pole moving contact contacts the neutral pole static contact, the neutral pole moving contact stops rotating, and the bracket continues to rotate around the pivot, driving the pushing portion to separate from the push rod and compressing the bracket spring to increase the contact pressure.
[0011] When opening the circuit breaker, the phase pole operating mechanism pulls the bracket through the driving rod, causing the bracket to rotate around the pivot, driving the pushing part to approach the push rod and release the bracket spring. After the pushing part contacts the push rod, it pushes the neutral pole moving contact to rotate synchronously with the bracket, driving the contact part to separate from the neutral pole static contact.
[0012] Preferably, the support spring is a torsion spring, and the support spring is rotatably arranged on the pivot, so that the support spring, the neutral pole moving contact and the support are coaxially arranged with the pivot as the center.
[0013] Preferably, the bracket includes a support plate and a support seat arranged on the side of the support plate, the support seat is rotatably connected to the drive rod, the neutral pole moving contact is provided with a raised spring portion, the bracket spring includes a spiral portion and a bracket portion and a contact portion respectively arranged at both ends of the spiral portion, the bracket portion and the contact portion are respectively pressed on the support seat and the spring portion.
[0014] Preferably, the support plate includes a first support rod and a second support rod connected to each other, a first bracket hole for passing the pivot is provided at the connection between the first support rod and the second support rod, the first bracket hole is rotatably connected to the pivot, a guide groove is provided at one end of the second support rod away from the first support rod, one end of the push rod is fixedly connected to the neutral pole moving contact, and the end of the push rod away from the neutral pole moving contact is inserted into the guide groove, and the groove wall of the guide groove constitutes the pushing part.
[0015] Preferably, a side surface of the support seat is provided with a limiting groove for limiting the bracket part of the bracket spring; and / or the guide groove is in an arc shape.
[0016] Preferably, the neutral pole moving contact is provided with a spring hole located between the pivot and the push rod, and the spring hole is used to connect the neutral pole contact spring.
[0017] Preferably, the neutral pole contact spring is arranged on a side of the neutral pole moving contact close to the neutral pole static contact and is located between the bracket and the leakage protection mechanism, and the housing is provided with a spring shaft for connecting the neutral pole contact spring.
[0018] Preferably, a supporting hole for passing the pivot is provided in the middle portion of the neutral pole moving contact, a contact portion is provided on one side of the supporting hole, an avoidance groove is provided between the supporting hole and the contact portion, a fixing hole for passing the push rod is provided between the supporting hole and the avoidance groove, a spring portion and a spring hole are respectively provided on opposite sides of a line connecting the supporting hole and the fixing hole, the spring portion is arranged parallel to the pivot, the spring portion is used to connect the bracket spring, and the spring hole is used to connect the neutral pole contact spring.
[0019] Preferably, the phase pole operating mechanism includes a phase pole lever and a contact support which are rotatably arranged respectively, the phase pole moving contact is connected to the contact support, the phase pole lever is connected to the phase pole spring, the phase pole lever is respectively provided with a rotatable phase pole jump buckle and a phase pole lock buckle, the phase pole lock buckle is snap-fitted with the phase pole jump buckle, the phase pole jump buckle is connected to the phase pole handle through a phase pole connecting rod, and the contact support can be driven to rotate when the phase pole lever is rotated, and the driving rod is connected between the neutral pole moving contact and the phase pole lever of the phase pole operating mechanism.
[0020] Preferably, a driving hole and a driving shaft are respectively provided at both ends of the driving rod, and the driving shaft is used to be inserted into the third bracket hole of the bracket so that the driving rod is rotatably connected with the neutral pole moving contact, and the phase pole lever of the phase pole is provided with a connecting shaft for inserting into the driving hole, and the partition is provided with a connecting groove for passing the connecting shaft.
[0021] Preferably, the phase pole lock is rotatably arranged on the connecting shaft.
[0022] Preferably, a leakage protection mechanism and a leakage tripping mechanism are also provided in the neutral pole, and the leakage protection mechanism includes a zero-sequence current transformer and a leakage tripping device. The neutral line loop and the phase line loop pass through the zero-sequence current transformer respectively, and the leakage tripping device is connected to the zero-sequence current transformer. When a leakage fault occurs, the leakage tripping device triggers the leakage tripping mechanism, and the leakage tripping mechanism pushes the phase line lock of the phase line operating mechanism to release the snap-fit between the phase line lock and the phase line tripping device.
[0023] Preferably, the leakage tripping mechanism includes a neutral line lever and a neutral line jumper and a neutral line lock buckle which are respectively rotatably arranged on the neutral line lever, the neutral line lever is connected to the neutral line mechanism spring, the neutral line jumper is connected to the leakage handle through a neutral line connecting rod, and the neutral line lock buckle is snap-fitted with the neutral line jumper.
[0024] Preferably, the phase pole handle is fixedly connected to the leakage handle.
[0025] Preferably, the leakage handle is located on the path where the phase pole handle moves from the open position to the closed position. The phase pole handle can drive the leakage handle when it moves from the open position to the closed position, and does not drive the leakage handle when the phase pole handle moves from the closed position to the open position.
[0026] Preferably, the leakage release mechanism includes a transmission connecting rod or a rotating driving member. When a leakage fault occurs, the leakage release triggers the transmission connecting rod to slide or drives the rotating driving member to rotate. The transmission connecting rod or the rotating driving member pushes the phase line lock to release the snap fit with the phase line jumper.
[0027] The phase-pole plus neutral-pole residual current operated circuit breaker of the utility model does not have a separate neutral-pole operating mechanism in the neutral pole. The phase-pole operating mechanism drives the bracket to rotate through the driving rod, and the neutral-pole moving contact is rotatably arranged on the rotatable bracket, and a bracket spring for pushing the neutral-pole moving contact is arranged on the bracket. The bracket and the neutral-pole moving contact are both arranged on a pivot. The overall structure is compact and simple. When the bracket and the neutral-pole moving contact rotate relative to each other, the contact part of the neutral-pole moving contact is pushed by the bracket spring to be pressed against the neutral-pole static contact, thereby increasing the pressure between the contact part and the neutral-pole static contact, and making the contact between the contact part and the neutral-pole static contact more reliable. In addition, the neutral-pole moving contact in this embodiment will not change the rotation center before and after the release from the neutral-pole static contact, and will always rotate around the pivot, ensuring that the contact point position does not slide when the moving and static contacts are in contact, thereby reducing the mechanical wear of the contacts. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a structural schematic diagram of a phase-pole plus neutral-pole type residual current operated circuit breaker of the utility model;
[0029] Figure 2 It is a schematic diagram of the structure when the static contact and the moving contact of the phase pole of the utility model are separated;
[0030] Figure 3 It is a schematic diagram of the structure of the utility model when the static contact and the moving contact of the phase neutral pole are separated;
[0031] Figure 4 It is a schematic diagram of the structure of the utility model when the neutral pole static contact and the neutral pole moving contact are separated;
[0032] Figure 5 It is a schematic diagram of the structure of the utility model when the neutral pole static contact and the neutral pole moving contact are in contact;
[0033] Figure 6 It is a structural schematic diagram of the utility model partition;
[0034] Figure 7 It is the mechanical principle diagram of the utility model in the open gate position;
[0035] Figure 8 It is the mechanical principle diagram of the closing position of the utility model;
[0036] Fig. 9 It is a structural schematic diagram of the bracket of the utility model;
[0037] Fig.10 It is a structural schematic diagram of the neutral pole moving contact of the utility model;
[0038] Fig.11 It is a structural schematic diagram of the driving rod of the utility model;
[0039] Fig.12 It is a structural schematic diagram of the phase lever of the utility model;
[0040] In the figure, housing 1; phase pole 2; neutral pole 3; partition 10; phase pole moving contact 22; phase pole static contact 23; arc extinguishing chamber 24; phase pole handle 25; phase pole lever 211; contact support 212; phase pole spring 213; phase pole trip buckle 214; phase pole lock buckle 215; phase pole connecting rod 216; overload protection mechanism 26; short circuit protection mechanism 27; bracket 31; neutral pole moving contact 32; neutral pole static contact 33; driving rod 34; neutral pole contact spring 35; leakage handle 36; bracket spring 38; pivot 311; push rod 312; fixing hole 321; bracket part 381; contact part 382; spring part 323; spring hole 324; support plate 313; support seat 314; first support rod 3131; second support rod 3132; first bracket hole 3133; guide groove 3134; third bracket hole 3135; limiting groove 3136; supporting hole 325; avoidance groove 329; contact part 322; spring shaft 105; driving hole 341; driving shaft 342; connecting shaft 343; connecting groove 344. DETAILED DESCRIPTION
[0041] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the phase-pole plus neutral-pole residual current operated circuit breaker of the present utility model. The phase-pole plus neutral-pole residual current operated circuit breaker of the present utility model is not limited to the description of the following embodiments.
[0042] like Figure 1 As shown, the phase-pole plus neutral-pole residual current operated circuit breaker of this embodiment includes a housing 1 and a phase pole 2 and a neutral pole 3 respectively arranged in the housing 1 , wherein the housing 1 is provided with a partition 10 between the phase pole 2 and the neutral pole 3 .
[0043] like Figure 2-3As shown, the phase pole 2 includes a phase pole operating mechanism, a phase pole moving contact 22, a phase pole static contact 23, an arc extinguishing chamber 24 and a phase pole handle 25. The phase pole moving contact 22 and the phase pole static contact 23 are connected to the phase pole circuit to form a part of the phase pole circuit. The phase pole moving contact 22 and the phase pole static contact 23 are respectively connected to the phase pole circuit through the phase pole first wiring terminal and the phase pole second wiring terminal at both ends of the phase pole 2. The phase pole handle 25 drives the phase pole moving contact 22 to contact and separate with the phase pole static contact 23 through the phase pole operating mechanism. The arc extinguishing chamber 24 is used to extinguish the arc generated on the phase pole moving contact 22 and the phase pole static contact 23. The phase pole operating mechanism includes a phase pole lever 211 and a contact support 212 that are respectively rotatably arranged. The phase pole lever 211 and the phase pole spring 213 The phase pole moving contact 22 is connected with the contact support 212, and the phase pole lever 211 is respectively provided with a rotatable phase pole jump buckle 214 and a phase pole lock buckle 215, and the phase pole jump buckle 214 is connected with the phase pole handle 25 through the phase pole connecting rod, and the phase pole lock buckle 215 is snap-fitted with the phase pole jump buckle 214 to lock the phase pole jump buckle 214, so that when the phase pole handle 25 pushes the phase pole jump buckle 214 through the phase pole connecting rod 216, the phase pole jump buckle 214 can drive the phase pole lever 211 to rotate, and when the phase pole lever 211 rotates, it can push the contact support 212, so that the contact support 212 drives the phase pole moving contact 22 to contact and separate with the phase pole static contact 23, and the phase pole lever 211 compresses the phase pole spring 213 when the phase pole moving contact 22 contacts with the phase pole static contact 23;
[0044] The phase pole 2 is provided with an overload protection mechanism 26 and a short circuit protection mechanism 27 for driving the phase pole lock buckle 215 to unlock the phase pole trip buckle 214. The overload protection mechanism 26 and the short circuit protection mechanism 27 respectively drive the phase pole lock buckle 215 to unlock the phase pole trip buckle 214 when the overload current and the short circuit current meet the conditions, so that the phase pole handle 25 cannot constrain the phase pole lever 211 or drive the phase pole lever 211 to rotate through the phase pole trip buckle 214, and release the phase pole spring 213, so that the phase pole spring 213 drives the phase pole lever 211 to push the contact support 212, so that the phase pole moving contact 22 is separated from the phase pole static contact 23. The phase pole spring 213 can be a compression spring, a torsion spring or other elastic member.
[0045] The short-circuit protection mechanism 27 includes a coil and an iron core driven by the coil. The coil is connected between the phase pole static contact 23 and the first phase pole line terminal. When the short-circuit current flowing through the coil meets the action condition, the coil drives the iron core to move, and the iron core directly or indirectly triggers the phase pole lock 215 to unlock the phase pole jump buckle 214.
[0046] The overload protection mechanism 26 includes a bimetallic strip connected between the phase pole moving contact 22 and the second phase pole terminal. When the overload current flowing through the bimetallic strip meets the action condition, the bimetallic strip bends due to the temperature rise, thereby directly or indirectly triggering the phase pole lock buckle 215 to unlock the phase pole trip buckle 214. This is the prior art in the field and will not be described in detail.
[0047] like Figure 4-5 As shown, the neutral pole 3 includes a neutral pole moving contact 32, a neutral pole static contact 33, and a driving rod 34. The neutral pole moving contact 32 and the neutral pole static contact 33 are connected to the neutral pole circuit and constitute a part of the neutral pole circuit. The neutral pole moving contact 32 and the neutral pole static contact 33 are connected to the neutral pole circuit through the neutral pole first wiring terminal and the neutral pole second wiring terminal at both ends of the neutral pole 3 cavity. The driving rod 34 is connected between the neutral pole moving contact 32 and the phase pole operating mechanism of the phase pole 2. The phase pole handle 25 drives the phase pole moving contact 22 to contact and separate with the phase pole static contact 23 through the phase pole operating mechanism, and drives the driving rod 34 through the phase pole operating mechanism. The driving rod 34 drives the neutral pole moving contact 32 to contact and separate with the neutral pole static contact 33. No separate neutral pole operating mechanism is provided in the neutral pole 3, which simplifies the structure of the circuit breaker.
[0048] refer to Figure 4 In this embodiment, the driving rod 34 is connected between the neutral pole moving contact 32 and the phase pole lever 211 of the phase pole operating mechanism, and the phase pole lever 211 of the phase pole 2 is provided with a coupling shaft 343 for inserting into the driving hole 341 of the driving rod 34. As other embodiments, the driving rod 34 can also be connected to the contact support 212 or the phase pole lock buckle 215 or the phase pole jump buckle 214 of the phase pole operating mechanism. A leakage protection mechanism and a leakage tripping mechanism are also provided in the neutral pole 3. The leakage protection mechanism is used to detect leakage current. When a leakage fault occurs, the leakage tripping mechanism is driven to drive the phase pole operating mechanism to trip, that is, the leakage tripping mechanism pushes the phase pole lock 215 of the phase pole operating mechanism to release the snap fit between the phase pole lock 215 and the phase pole tripping buckle 214 to achieve leakage protection. By placing the leakage module together with the neutral pole 3, the layout of the circuit breaker is optimized so that the thickness of the circuit breaker can be 36 mm, wherein the phase pole 2 is a module space of 18 mm, and the neutral pole 3 including the leakage module is a module space, which is separated by a partition 10.
[0049] Specifically, the leakage tripping mechanism includes a neutral pole lever and a neutral pole jump buckle and a neutral pole lock buckle which are respectively rotatably arranged on the neutral pole lever, the neutral pole lever is connected to the neutral pole mechanism spring, the neutral pole jump buckle is connected to the leakage handle 36 through the neutral pole connecting rod 314, and the neutral pole lock buckle cooperates with the neutral pole jump buckle to lock the neutral pole jump buckle, so that when the leakage handle 36 pushes the neutral pole jump buckle through the neutral pole connecting rod 314, the neutral pole jump buckle can drive the neutral pole lever to rotate, the leakage handle 36 is linked with the phase pole handle 25, and the phase pole handle 25 drives the phase pole moving contact 22 to contact the phase pole static contact 23 through the phase pole operating mechanism, and drives the neutral pole moving contact 32 to contact the neutral pole static contact 33 through the driving rod 34, and drives the leakage handle 36 to rotate when the driving rod 34 drives the neutral pole moving contact 32 to contact the neutral pole static contact 33, and the leakage handle 36 drives the neutral pole lever to compress the neutral pole mechanism spring.
[0050] The leakage protection mechanism includes a zero-sequence current transformer and a leakage release. The leakage release is usually an electromagnetic release. The zero-sequence current transformer is used to sense the leakage current. The neutral pole loop and the phase pole loop pass through the zero-sequence current transformer respectively. When the leakage current of the zero-sequence current transformer meets the action condition, the leakage release is actuated to trigger the neutral pole lock to unlock the neutral pole jump button, so that the leakage handle 36 cannot constrain the neutral pole lever or The neutral pole lever is driven to rotate, and the neutral pole mechanism spring is released, so that the neutral pole mechanism spring drives the neutral pole lever to push the phase pole lock 215 of the phase pole operating mechanism, so that the phase pole lock 215 unlocks the phase pole jump buckle 214, and the snap fit between the phase pole lock 215 and the phase pole jump buckle 214 is released, so that the phase pole operating mechanism is released to drive the phase pole moving contact 22 to separate from the phase pole static contact 23, and the neutral pole moving contact 32 to separate from the neutral pole static contact 33, so as to realize leakage protection.
[0051] It should be noted that the phase pole handle 25 and the leakage handle 36 can be fixedly connected, and the phase pole handle 25 can drive the leakage handle 36 to move to the opening position when performing a normal opening operation. Alternatively, the leakage handle 36 is located on the path of the phase pole handle 25 moving from the open position to the closed position. The phase pole handle 25 can drive the leakage handle 36 when it moves from the open position to the closed position. The phase pole handle 25 does not drive the leakage handle 36 when it moves from the closed position to the open position. The leakage handle 36 can remain in the position corresponding to the closed position of the phase pole handle 25 and does not move with the phase pole handle 25, so that the leakage protection mechanism is in a state of storing energy in the neutral pole mechanism spring. At this time, the phase pole handle 25 drives the phase pole moving contact 22 and the phase pole static contact 23 to separate through the phase pole operating mechanism, and drives the neutral pole moving contact 32 and the neutral pole static contact 33 to separate through the driving rod 34, but the leakage handle 36 does not move, and the neutral pole lever remains in a state of compressing the neutral pole mechanism spring.
[0052] In addition, the leakage tripping mechanism of this embodiment is similar to a four-bar structure that does not drive contacts. As other embodiments, the leakage tripping mechanism can also be a simple transmission connecting rod or a rotating driving member. When a leakage fault occurs, the electromagnetic tripping device acting as a leakage tripping device drives the transmission connecting rod to slide or drives the rotating driving member to rotate. The transmission connecting rod or the rotating driving member pushes the phase pole lock buckle 215 to release the buckle fit with the phase pole jump buckle 214, thereby realizing leakage protection.
[0053] like Figure 2-5 As shown, an improvement of the present application is that the neutral pole 3 is provided with a bracket 31, and the phase pole operating mechanism drives the bracket 31 to rotate through the driving rod 34, so that the bracket 31 drives the neutral pole moving contact 32 to contact and separate with the neutral pole static contact 33, and a bracket spring 38 is provided on the bracket 31. When the neutral pole moving contact 32 contacts with the neutral pole static contact 33, that is, when the circuit breaker is closed, the bracket spring 38 pushes the neutral pole moving contact 32 to be pressed against the neutral pole static contact 33, and the phase pole operating mechanism drives the bracket 31 to rotate around the pivot 311 through the driving rod 34, and the neutral pole moving contact 32 and the bracket spring 38 are respectively rotatably arranged on the pivot 311, and the two ends of the bracket spring 38 are respectively connected to the bracket 31 and the neutral pole moving contact 32.
[0054] Specifically, one of the bracket 31 and the neutral pole moving contact 32 is provided with a push rod 312 for pushing the neutral pole moving contact 32 to rotate, and the other of the bracket 31 and the neutral pole moving contact 32 is provided with a pushing portion that cooperates with the push rod 312. When the push rod 312 of the bracket 31 contacts the pushing portion, the bracket 31 is driven by the driving rod 34 to drive the neutral pole moving contact 32 to rotate around the pivot 311 as the center. Through the driving cooperation between the push rod 312 and the pushing portion, the neutral pole moving contact 32 is moved close to and away from the neutral pole static contact 33, thereby realizing the closing and opening of the circuit breaker. The pivot 311 in this embodiment is arranged on the partition 10 Figure 6 , the first bracket hole 3133 of the bracket 31 is sleeved on the pivot 311 for rotational cooperation. Obviously, the pivot 311 can also be set on the housing 1. As another embodiment, the pivot 311 can be set on the bracket 31, and a matching rotation hole is set on the housing 1. In this embodiment, the push rod 312 is fixedly set on the neutral pole moving contact 32, and the pushing part is set on the bracket 31. The positions of the push rod 312 and the pushing part can also be swapped.
[0055] When the circuit breaker is closed, the neutral pole moving contact 32 moves close to the neutral pole static contact 33, and the phase pole operating mechanism pushes the bracket 31 through the driving rod 34, so that the bracket 31 drives the neutral pole moving contact 32 to rotate around the pivot 311 as the center, until the contact portion 322 on the neutral pole moving contact 32 contacts the neutral pole static contact 33. After the contact portion 322 of the neutral pole moving contact 32 contacts the neutral pole static contact 33, the neutral pole moving contact 32 stops rotating due to the obstruction of the neutral pole static contact 33, and the phase pole operating mechanism pushes the bracket 31 through the driving rod 34 to continue rotating a short distance around the pivot 311 as the center, and the bracket 31 and the neutral pole moving contact 32 rotate relative to each other, driving the pushing portion and the push rod 312 to separate and compress the bracket spring 38 to increase the contact pressure, so that the bracket spring 38 pushes the contact portion 322 of the neutral pole moving contact 32 to press tightly on the neutral pole static contact 33;
[0056] When the circuit breaker is opened, as the neutral pole moving contact 32 moves away from the neutral pole static contact 33, the phase pole operating mechanism pushes the bracket 31 through the driving rod 34, causing the bracket 31 to rotate around the pivot 311, driving the pushing part to approach the push rod 312 and release the bracket spring 38. After contacting the push rod 312, the pushing part pushes the neutral pole moving contact 32 to rotate synchronously with the bracket 31, driving the contact part 322 to separate from the neutral pole static contact 33.
[0057] In the phase-pole plus neutral-pole residual current operated circuit breaker of this embodiment, a separate neutral-pole operating mechanism is not arranged in the neutral pole 3. The phase-pole operating mechanism drives the bracket 31 to rotate through the driving rod 34, and the neutral-pole moving contact 32 is rotatably arranged on the rotatable bracket 31, and a bracket spring 38 for pushing the neutral-pole moving contact 32 is arranged on the bracket 31. The bracket 31, the neutral-pole moving contact 32 and the bracket spring 38 are all arranged on the pivot 311. The overall structure is compact and simple. When the bracket 31 and the neutral-pole moving contact 32 rotate relative to each other, the contact portion 322 of the neutral-pole moving contact 32 is pushed by the bracket spring 38 to be pressed against the neutral-pole static contact 33, thereby increasing the pressure between the contact portion 322 and the neutral-pole static contact 33, and making the contact between the contact portion 322 and the neutral-pole static contact 33 more reliable. In addition, in this embodiment, the neutral pole moving contact 32 will not change its rotation center before and after being released from contact with the neutral pole static contact 33, and will always rotate around the pivot 311, ensuring that the contact point does not slip when the moving and static contacts are in contact, thereby reducing mechanical wear of the contacts.
[0058] like Figure 5As shown, the bracket spring 38 of this embodiment is a torsion spring, and the bracket spring 38 includes a spiral portion and a bracket portion 381 and a contact portion 382 respectively arranged at both ends of the spiral portion. The spiral portion can be rotatably arranged on the pivot, so that the bracket spring 38, the neutral pole moving contact 32 and the bracket 31 are coaxially arranged with the pivot as the center, and the bracket 31 includes a support plate 313 and a support seat 314 arranged on the side of the support plate 313. The neutral pole moving contact 32 and the support seat 314 are arranged on the same side of the support plate 313, and the neutral pole moving contact 32 and the support seat 314 are arranged on the same side of the support plate 313, and the neutral pole moving contact 32 and the support seat 314 are arranged on the same side of the support plate 313. A raised spring portion 323 is provided on the side of the contact 32, and the bracket portion 381 and the contact portion 382 are located between the support seat 314 and the spring portion 323, and the bracket portion 381 and the contact portion 382 are pressed against the support seat 314 and the spring portion 323 respectively. When the neutral pole moving contact 32 is blocked by the neutral pole static contact 33, the bracket 31 and the neutral pole moving contact 32 rotate relative to each other, driving the distance between the support seat 314 and the spring portion 323 to change, and the bracket spring 38 is compressed and released by the support seat 314 and the spring portion 323. Of course, the bracket spring 38 can also adopt other structures, such as a compression spring whose two ends are respectively connected to the support seat 314 and the spring portion 323, and the support seat 314 and the spring portion 323 compress and release the compression spring, which all belong to the protection scope of the present utility model.
[0059] like Figure 4-5 As shown in FIGS. 9-10 , the neutral pole 3 is further provided with a neutral pole contact spring 35, and the neutral pole contact spring 35 is connected to the neutral pole moving contact 32. The neutral pole moving contact 32 is provided with a spring hole 324 located between the pivot 311 and the push rod 312, and the spring hole 324 is used to connect the neutral pole contact spring 35, and the neutral pole contact spring 35 pushes the contact portion 322 of the neutral pole moving contact 32 to press against the neutral pole static contact 33.
[0060] In this embodiment, the neutral pole contact spring 35 is connected to the spring hole 324 of the neutral pole moving contact 32 between the pivot 311 and the push rod 312, so that the neutral pole contact spring 35 can provide the final pressure for the neutral pole moving contact 32, and the neutral pole contact spring 35 can provide the final pressure for the neutral pole moving contact 32 with the combined force of the support spring 38, avoiding the neutral pole contact spring 35 or the support spring 38 to provide the final pressure alone, which can make the provided final pressure more reliable and more controllable. Of course, the support spring 38 can also provide the final pressure for the neutral pole moving contact 32 alone, and the neutral pole contact spring 35 is not provided, which belongs to the protection scope of the utility model.
[0061] like Figure 5As shown, the neutral pole contact spring 35 of this embodiment is a tension spring, which is arranged on the side of the neutral pole moving contact 32 close to the neutral pole static contact 33 and is located between the bracket 31 and the leakage protection mechanism. The housing 1 is provided with a spring shaft 105 for connecting the neutral pole contact spring 35.
[0062] It is understandable that the neutral pole contact spring 35 may also adopt other structures, such as a compression spring or a torsion spring. When the neutral pole contact spring 35 is a torsion spring, one end of the torsion spring extends to the side of the neutral pole moving contact 32, and the spring hole 324 may be a protruding structure arranged on the neutral pole moving contact 32. The torsion spring pushes the protruding structure to drive the neutral pole moving contact 32 to rotate, which all fall within the protection scope of the present utility model.
[0063] like Figure 7 The mechanical principle diagram when the neutral pole moving contact 32 is separated from the neutral pole static contact 33 is shown. The phase pole handle 25, phase pole connecting rod 216, phase pole lever 211 and shell 1 of the phase pole operating mechanism form a four-bar linkage with one degree of freedom. The phase pole lever, driving rod 34, bracket 31 and shell 1 of the leakage tripping mechanism form a four-bar linkage. At this time, the bracket 31 and the neutral pole moving contact 32 can be regarded as a whole. There are 3 moving parts except the shell 1. The push rod 312 of the neutral pole moving contact 32 extends into the guide groove 3134. The neutral pole moving contact 32 rotates around the pivot 311 under the action of the bracket spring 38 force F, and the neutral contact spring 35 provides the force for resetting the mechanism.
[0064] like Figure 8 The mechanical principle diagram is shown when the neutral pole moving contact 32 is in contact with the neutral pole static contact 33. The phase pole handle 25, the phase pole connecting rod 216, the phase pole lever 211 and the shell 1 of the phase pole operating mechanism form a four-bar linkage with one degree of freedom. The push rod 312 is located in the middle position of the guide groove 3134. The phase pole lever 211, the driving rod 34, the neutral pole moving contact 32, the guide groove 3134 on the bracket 31 and the partition 10 form a second four-bar linkage. In addition to the shell 1, there are a total of 3 moving parts. At the same time, the neutral contact spring 35 provides a torque for the neutral pole moving contact 32 to rotate clockwise around the pivot 311, so that the neutral pole moving contact 32 is pressed against the neutral pole static contact 33.
[0065] like Fig. 9As shown, the support plate 313 includes a first support rod 3131 and a second support rod 3132 connected to each other, and a first bracket hole 3133 for passing the pivot 311 is provided at the connection between the first support rod 3131 and the second support rod 3132, and the first bracket hole 3133 is rotatably connected to the pivot 311, and a guide groove 3134 is provided at one end of the second support rod 3132 away from the first support rod 3131, and one end of the push rod 312 is inserted into the fixing hole 321 of the neutral pole moving contact 32 for fixed connection, and the end of the push rod 312 away from the neutral pole moving contact 32 is inserted into the guide groove 3134, and the groove wall of the guide groove 3134 constitutes the pushing part.
[0066] The guide groove 3134 can not only form a push part and push rod 312 to drive the neutral pole moving contact 32 to rotate, but also play a guiding role. Of course, the guide groove 3134 can also be omitted, and a boss-shaped push part can be provided, which all belong to the protection scope of the utility model.
[0067] Preferably, the guide groove 3134 is in an arc shape, and the push rod 312 can move in the guide groove 3134 .
[0068] Furthermore, the support seat 314 is provided with a third bracket hole 3135 for passing the driving shaft 342, the support seat 314 is rotatably connected with the driving rod 34 through the driving shaft 342, and the side of the support seat 314 is provided with a limiting groove 3136 for limiting the bracket portion 381 of the bracket spring 38. Preferably, the angle between the first support rod 3131 and the second support rod 3132 is greater than or equal to 90 degrees, and the spring hole 324 of the first support rod 3131 and the second support rod 3132 can not only make the structure of the first support rod 3131 and the second support rod 3132 more reliable, but also can leave space for the connection between the neutral pole moving contact 32 and the neutral pole contact spring 35, and has the characteristics of compact structure. Of course, the pivot 311 and the push rod 312 can also be integrally formed with the bracket 31, which all belong to the protection scope of the utility model.
[0069] like Fig.10 As shown, a supporting hole 325 for passing the pivot 311 is provided in the middle of the neutral pole moving contact 32, and a contact portion 322 is provided on one side of the supporting hole 325 of the neutral pole moving contact 32, and an avoidance groove 329 is provided between the supporting hole 325 and the contact portion 322, and a fixing hole 321 for passing the push rod 312 is provided between the supporting hole 325 and the avoidance groove 329, and a spring portion 323 and a spring hole 324 are respectively provided on opposite sides of the line connecting the supporting hole 325 and the fixing hole 321, and the spring portion 323 is arranged parallel to the pivot 311, and the spring portion 323 is used to connect the bracket spring 38, and the spring hole 324 is used to connect the neutral pole contact spring 35.
[0070] like Figure 11-12As shown, the two ends of the driving rod 34 are respectively provided with a driving hole 341 and a driving shaft 342, the driving shaft 342 is used to be inserted into the third bracket hole 3135 of the bracket 31, so that the driving rod 34 is rotatably connected with the neutral pole moving contact 32, the phase pole lever 211 of the phase pole 2 is provided with a coupling shaft 343 for being inserted into the driving hole 341, so that the phase pole lever 211 is rotatably connected with the driving rod 34, the partition 10 is provided with a coupling groove 344 for passing the coupling shaft 343, and the phase pole lock 215 is rotatably arranged on the coupling shaft 343. When the phase pole lever 211 rotates, the coupling shaft 343 is driven to move in the coupling groove 344, and at the same time, the coupling shaft 343 drives the driving rod 34 to push the neutral pole moving contact 32, so that the neutral pole moving contact 32 moves.
[0071] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.
[0072] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.
Claims
1. A phase-pole plus neutral-pole residual current operated circuit breaker, comprising a housing (1) and a phase pole (2) and a neutral pole (3) respectively arranged in the housing (1), wherein the housing (1) is provided with a partition (10) between the phase pole (2) and the neutral pole (3), The phase pole (2) comprises a phase pole operating mechanism, a phase pole moving contact (22), a phase pole static contact (23) and a phase pole handle (25); the phase pole handle (25) drives the phase pole moving contact (22) to contact and separate with the phase pole static contact (23) through the phase pole operating mechanism; The neutral pole (3) comprises a neutral pole moving contact (32), a neutral pole static contact (33), and a driving rod (34), wherein the driving rod (34) is connected between the neutral pole moving contact (32) and a phase pole operating mechanism of the phase pole (2), and is characterized in that: The neutral pole (3) is provided with a bracket (31), a neutral pole moving contact (32) and a bracket spring (38); the bracket (31) and the neutral pole moving contact (32) are respectively rotatably arranged on a pivot (311); two ends of the bracket spring (38) are respectively connected to the bracket (31) and the neutral pole moving contact (32); One of the bracket (31) and the neutral pole moving contact (32) is provided with a push rod (312), and the other of the bracket (31) and the neutral pole moving contact (32) is provided with a pushing portion that cooperates with the push rod (312). When the push rod (312) of the bracket (31) contacts the pushing portion, the phase pole operating mechanism drives the bracket (31) to rotate around the pivot (311) through the driving rod (34), and the bracket (31) drives the neutral pole moving contact (32) to rotate around the pivot (311) to contact and separate from the neutral pole static contact (33). When the neutral pole moving contact (32) contacts the neutral pole static contact (33), the bracket spring (38) pushes the neutral pole moving contact (32) to be pressed against the neutral pole static contact (33).
2. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 1, characterized in that: When the switch is closed, the phase pole operating mechanism pushes the bracket (31) through the driving rod (34), so that the bracket (31) drives the neutral pole moving contact (32) to rotate around the pivot (311) until the contact portion (322) on the neutral pole moving contact (32) contacts the neutral pole static contact (33). After the contact portion (322) of the neutral pole moving contact (32) contacts the neutral pole static contact (33), the neutral pole moving contact (32) stops rotating, and the bracket (31) continues to rotate around the pivot (311), driving the push portion and the push rod (312) to separate and compressing the bracket spring (38) to increase the contact pressure; When the switch is opened, the phase pole operating mechanism pulls the bracket (31) through the driving rod (34), causing the bracket (31) to rotate around the pivot (311), driving the pushing part to approach the push rod (312) and release the bracket spring (38). After the pushing part contacts the push rod (312), the neutral pole moving contact (32) is pushed to rotate synchronously with the bracket (31), driving the contact part (322) to separate from the neutral pole static contact (33).
3. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 1, characterized in that: The support spring (38) is a torsion spring, and the support spring (38) can be rotatably arranged on the pivot (311), so that the support spring (38), the neutral pole moving contact (32) and the support (31) are coaxially arranged with the pivot (311) as the center.
4. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 1, characterized in that: The support (31) comprises a support plate (313) and a support seat (314) arranged on the side of the support plate (313); the support seat (314) is rotatably connected to the drive rod (34); the neutral pole moving contact (32) is provided with a protruding spring portion (323); the support spring (38) comprises a spiral portion and a support portion (381) and a contact portion (382) respectively arranged at two ends of the spiral portion; the support portion (381) and the contact portion (382) are respectively pressed against the support seat (314) and the spring portion (323).
5. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 4, characterized in that: The support plate (313) comprises a first support rod (3131) and a second support rod (3132) connected to each other. A first bracket hole (3133) for passing the pivot (311) is provided at the connection between the first support rod (3131) and the second support rod (3132). The first bracket hole (3133) is rotatably connected to the pivot (311). A guide groove (3134) is provided at one end of the second support rod (3132) away from the first support rod (3131). One end of the push rod (312) is fixedly connected to the neutral pole moving contact (32). The end of the push rod (312) away from the neutral pole moving contact (32) is inserted into the guide groove (3134). The groove wall of the guide groove (3134) constitutes the pushing portion.
6. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 5, characterized in that: A limiting groove (3136) for limiting the bracket portion (381) of the bracket spring (38) is provided on the side surface of the support seat (314); and / or the guide groove (3134) is in an arc shape.
7. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 1, characterized in that: The neutral pole movable contact (32) is provided with a spring hole (324) located between the pivot (311) and the push rod (312), and the spring hole (324) is used to connect the neutral pole contact spring (35).
8. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 7, characterized in that: The neutral pole contact spring (35) is arranged on a side of the neutral pole moving contact (32) close to the neutral pole static contact (33) and is located between the bracket (31) and the leakage protection mechanism. The housing (1) is provided with a spring shaft (105) for connecting the neutral pole contact spring (35).
9. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 7, characterized in that: A supporting hole (325) for passing the pivot (311) is provided in the middle of the neutral pole moving contact (32); a contact portion (322) is provided on one side of the supporting hole (325); an escape groove (329) is provided between the supporting hole (325) and the contact portion (322); a fixing hole (321) for passing the push rod (312) is provided between the supporting hole (325) and the escape groove (329); a spring portion (323) and a spring hole (324) are provided on opposite sides of a line connecting the supporting hole (325) and the fixing hole (321); the spring portion (323) is arranged parallel to the pivot (311); and the spring portion (323) is used to connect the bracket spring (38).
10. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 1, characterized in that: The phase pole operating mechanism comprises a phase pole lever (211) and a contact support (212) which are respectively rotatably arranged, the phase pole moving contact (22) is connected to the contact support (212), the phase pole lever (211) is connected to a phase pole spring (213), the phase pole lever (211) is respectively provided with a rotatable phase pole jump buckle (214) and a phase pole lock buckle (215), the phase pole lock buckle (215) is snap-fitted with the phase pole jump buckle (214), the phase pole jump buckle (214) is connected to the phase pole handle (25) via a phase pole connecting rod (216), and the phase pole lever (211) can drive the contact support (212) to rotate when rotating, and the driving rod (34) is connected between the neutral pole moving contact (32) and the phase pole lever (211) of the phase pole operating mechanism.
11. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 10, characterized in that: The two ends of the driving rod (34) are respectively provided with a driving hole (341) and a driving shaft (342); the driving shaft (342) is used to be inserted into the third bracket hole (3135) of the bracket (31) so that the driving rod (34) is rotatably connected to the neutral pole moving contact (32); the phase pole lever (211) of the phase pole (2) is provided with a coupling shaft (343) for being inserted into the driving hole (341); and the partition plate (10) is provided with a coupling groove (344) for passing the coupling shaft (343).
12. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 11, characterized in that: The phase pole lock buckle (215) is rotatably arranged on the connecting shaft (343).
13. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 10, characterized in that: The neutral pole (3) is also provided with a leakage protection mechanism and a leakage tripping mechanism. The leakage protection mechanism comprises a zero-sequence current transformer and a leakage tripping device. The neutral line loop and the phase line loop respectively pass through the zero-sequence current transformer. The leakage tripping device is connected to the zero-sequence current transformer. When a leakage fault occurs, the leakage tripping device triggers the leakage tripping mechanism. The leakage tripping mechanism pushes the phase line lock (215) of the phase line operating mechanism to release the snap fit between the phase line lock (215) and the phase line tripping device (214).
14. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 13, characterized in that: The leakage tripping mechanism comprises a neutral line lever and a neutral line tripping buckle and a neutral line locking buckle which are respectively rotatably arranged on the neutral line lever; the neutral line lever is connected to a neutral line mechanism spring; the neutral line tripping buckle is connected to a leakage handle (36) via a neutral line connecting rod; and the neutral line locking buckle is snap-fitted with the neutral line tripping buckle.
15. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 14, characterized in that: The phase pole handle (25) is fixedly connected to the leakage handle (36).
16. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 14, characterized in that: The leakage handle (36) is located on a path where the phase pole handle (25) moves from the open position to the closed position. When the phase pole handle (25) moves from the open position to the closed position, the leakage handle (36) can be driven. When the phase pole handle (25) moves from the closed position to the open position, the leakage handle (36) is not driven.
17. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 13, characterized in that: The leakage tripping mechanism comprises a transmission connecting rod or a rotating driving member. When a leakage fault occurs, the leakage tripping device triggers the transmission connecting rod to slide or drives the rotating driving member to rotate. The transmission connecting rod or the rotating driving member pushes the phase line lock buckle (215) to release the buckle fit with the phase line trip buckle (214).