Phase pole and neutral pole type residual current operated circuit breaker

Abstract

A phase pole and neutral pole type residual current operated circuit breaker comprises a shell, a phase pole and a neutral pole, the phase pole and the neutral pole are respectively arranged in the shell, the shell is provided with a partition plate between the phase pole and the neutral pole, and the neutral pole comprises a neutral pole moving contact, a neutral pole static contact and a driving rod. The driving rod is connected between the neutral pole moving contact and a phase pole operating mechanism of the phase pole, the neutral pole is provided with a rotatably arranged support, the support is provided with a second shaft, the neutral pole moving contact is rotatably arranged on the second shaft, and the phase pole operating mechanism of the phase pole drives the support to rotate with the first shaft as the center through the driving rod. When the neutral pole moving contact is in contact with the neutral pole static contact, the support spring pushes the neutral pole moving contact to be tightly pressed on the neutral pole static contact, so that the pressure between the contact part and the neutral pole static contact can be increased, and the contact between the contact part and the neutral pole static contact is more reliable.

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.

[0008] The driving rod is connected between the neutral pole moving contact and the phase pole operating mechanism of the phase pole.

[0009] The neutral pole is provided with a rotatable bracket, a second shaft is provided on the bracket, and the neutral pole moving contact is rotatably set on the second shaft. The phase pole operating mechanism drives the bracket to rotate around the first shaft through a driving rod, so that the bracket drives the neutral pole moving contact to contact and separate with 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, the bracket spring is arranged on the bracket, and when the circuit breaker is closed, after the neutral pole moving contact contacts the neutral pole static contact, the phase pole operating mechanism drives the bracket through the driving rod, so that the bracket can continue to rotate relative to the neutral pole moving contact and compress the bracket spring, so that the bracket spring pushes the neutral pole moving contact to be pressed against the neutral pole static contact.

[0011] Preferably, the neutral pole moving contact is provided with a blocking portion, the bracket spring is connected between the first shaft and the neutral pole moving contact, and the bracket spring drives the neutral pole moving contact to rotate so that the blocking portion of the neutral pole moving contact contacts the first shaft.

[0012] Preferably, when closing the circuit breaker, 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 first axis until the contact portion on the neutral pole moving contact contacts the neutral pole static contact.

[0013] When the contact portion of the neutral pole moving contact contacts the neutral pole static contact, the bracket continues to rotate around the first axis and pushes the neutral pole moving contact through the second axis, so that the neutral pole moving contact rotates around the contact position of the contact portion and the neutral pole static contact, and then the bracket and the neutral pole moving contact rotate relatively, the blocking portion of the neutral pole moving contact separates from the first axis and compresses the bracket spring, so that the bracket spring pushes the contact portion of the neutral pole moving contact to be pressed tightly on the neutral pole static contact;

[0014] When opening the circuit breaker, the phase pole operating mechanism pushes the bracket through the driving rod, causing the bracket to rotate around the first axis, and pushes the neutral pole moving contact through the second axis, causing the neutral pole moving contact to rotate around the contact position between the contact part and the neutral pole static contact. At the same time, the bracket spring pushes the neutral pole moving contact until the neutral pole moving contact drives the blocking part to contact the first axis, and then the neutral pole moving contact rotates with the bracket around the first axis, driving the contact part to separate from the neutral pole static contact.

[0015] Preferably, it also includes a neutral pole contact spring connected to the neutral pole moving contact, when the neutral pole moving contact rotates around the second axis, the neutral pole contact spring applies a torque rotating along a first direction to the neutral pole moving contact, so that the contact portion of the neutral pole moving contact is away from the neutral pole static contact, when the neutral pole moving contact rotates around the contact position of the contact portion with the neutral pole static contact, the neutral pole contact spring applies a torque rotating along a second direction to the neutral pole moving contact, so that the contact portion of the neutral pole moving contact is pressed against the neutral pole static contact, and the first direction and the second direction are opposite.

[0016] Preferably, the neutral pole moving contact is provided with a connecting structure located between the first axis and the second axis, the connecting structure is used to connect the neutral pole contact spring, the neutral pole contact spring is a tension spring, the neutral pole contact spring is arranged on the side of the neutral pole moving contact away from the neutral pole static contact, and is located between the bracket and the terminal, and the shell is provided with a spring shaft for connecting the neutral pole contact spring.

[0017] Preferably, the bracket spring is a torsion spring, which includes a spiral portion rotatably arranged on the bracket, and a bracket portion and a contact portion respectively arranged at both ends of the spiral portion, a raised spring portion is provided on the side of the neutral pole moving contact, the bracket portion and the contact portion are located between the first shaft and the spring portion, and the bracket portion and the contact portion are respectively pressed on the first shaft and the spring portion, when the bracket and the neutral pole moving contact rotate relative to each other, the distance between the first shaft and the spring portion is driven to change, and the bracket spring is compressed and released through the first shaft and the spring portion.

[0018] Preferably, the bracket includes a support plate, the support plate includes a first support rod and a second support rod connected at one end, a first bracket hole for passing the first axis is provided at the connection between the first support rod and the second support rod, a second bracket hole for passing the second axis is provided at an end of the second support rod away from the first support rod, an end of the first support rod away from the second support rod is connected to a support seat, the support seat is provided with a third bracket hole for passing the drive shaft, and the support seat is rotatably connected to the drive rod via the drive shaft.

[0019] Preferably, the bracket includes two support plates, the two support plates are arranged opposite to each other, the support seat is connected between the two support plates, a bracket groove for avoiding the neutral pole moving contact is provided between the two support plates, the second axis passes through the bracket groove and is rotatably connected to the bracket, the middle part of the first axis passes through the bracket groove to block the blocking part of the neutral pole moving contact, and the two ends of the first axis are relatively arranged on both sides of the bracket and are rotatably connected to the shell.

[0020] Preferably, the angle between the first support rod and the second support rod is greater than or equal to 90 degrees.

[0021] Preferably, a supporting hole for passing the second axis is provided in the middle portion of the neutral pole moving contact, a contact portion is provided on one side of the supporting hole of the neutral pole moving contact, an avoidance groove is provided between the supporting hole and the contact portion, a blocking portion protruding in a direction away from the contact portion is provided on the side of the supporting hole away from the contact portion, a connecting portion is provided on the side between the blocking portion and the supporting hole, the connecting portion is provided with a connecting structure for connecting a neutral pole contact spring, a spring portion is provided on the side of the connecting portion close to the contact portion, and the spring portion is located on the side of the neutral pole moving contact.

[0022] Preferably, the spring portion is arranged parallel to the first axis.

[0023] 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 can drive the contact support to rotate when the phase pole lever rotates; the driving rod is connected between the neutral pole moving contact and the phase pole lever of the phase pole.

[0024] 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.

[0025] Preferably, the phase pole lock is rotatably arranged on the connecting shaft.

[0026] The utility model discloses a phase-pole plus neutral-pole residual current operated circuit breaker, in which the neutral-pole moving contact is rotatably arranged on a rotatable bracket, and a bracket spring for pushing the neutral-pole moving contact is arranged on the bracket. When the bracket and the neutral-pole moving contact rotate relatively, the contact portion 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 portion and the neutral-pole static contact, and making the contact between the contact portion and the neutral-pole static contact more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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;

[0028] Figure 2 It is a schematic diagram of the structure of the utility model when the static contact and the moving contact of the phase pole are separated;

[0029] Figure 3 It is a schematic diagram of the structure of the utility model when the phase neutral pole static contact and the moving contact are in contact;

[0030] 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;

[0031] 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;

[0032] Figure 6 It is a schematic diagram of the cooperation between the driving rod and the neutral pole moving contact and the phase pole of the utility model;

[0033] Figure 7 It is a structural schematic diagram of the utility model partition;

[0034] Figure 8 It is the mechanical principle diagram of the utility model in the open gate position;

[0035] Fig. 9 It is the mechanical principle diagram of the closing position of the utility model;

[0036] Fig.10 It is a schematic diagram of the cooperation between the bracket and the neutral pole moving contact of the utility model;

[0037] Fig.11 It is a structural schematic diagram of the bracket of the utility model;

[0038] Fig.12 It is a structural schematic diagram of the neutral pole moving contact of the utility model;

[0039] Fig.13 It is a structural schematic diagram of the driving rod of the utility model;

[0040] Fig.14 It is a structural schematic diagram of the phase lever of the utility model;

[0041] 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; first shaft 3 11; second shaft 312; blocking portion 321; bracket portion 381; contact portion 382; spring portion 323; connecting structure 324; support plate 313; support seat 314; first support rod 3131; second support rod 3132; first bracket hole 3133; second bracket hole 3134; third bracket hole 3135; supporting hole 325; connecting portion 326; avoidance groove 329; contact portion 322; spring shaft 105; driving hole 341; driving shaft 342; connecting shaft 343; connecting groove 344. DETAILED DESCRIPTION

[0042] 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.

[0043] like Figure 1As 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 .

[0044] like Figure 2-3 As 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. In this embodiment, 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 2 13 is connected, the phase pole moving contact 22 is connected to 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, the phase pole jump buckle 214 is connected to 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;

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] refer to Figure 6 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. As other embodiments, the driving rod 34 can also be connected to the contact support 212 or the phase pole lock 215 or the phase pole jump buckle 214 of the phase pole operating mechanism.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] like Figure 6 As shown, an improvement of the present application is that the neutral pole 3 is provided with a rotatable bracket 31, the bracket 31 is provided with a second shaft 312, the neutral pole moving contact 32 is rotatably set on the second shaft 312, and the phase pole operating mechanism drives the bracket 31 to rotate around the first shaft 311 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 the bracket 31 is provided with a bracket spring 38. 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.

[0056] Preferably, in order to ensure sufficient contact pressure, when the circuit breaker is closed, after the neutral pole moving contact 32 contacts the neutral pole static contact 33, the phase pole operating mechanism still drives the bracket 31 to continue to rotate a short distance through the driving rod 34. The bracket 31 can continue to rotate a certain distance relative to the neutral pole moving contact 32 and compress the bracket spring 38, so that the bracket spring 38 pushes the neutral pole moving contact 32 to press against the neutral pole static contact 33, thereby increasing the contact pressure.

[0057] Specifically, in this embodiment, the bracket 31 is provided with a first shaft 311 rotatably connected to the partition 10, and the bracket 31 is driven by the driving rod 34 to rotate around the first shaft 311. The bracket 31 is provided with a second shaft 312, and the neutral pole moving contact 32 is rotatably arranged on the second shaft 312. The neutral pole moving contact 32 is provided with a blocking portion 321 located on the side of the first shaft 311. The bracket 31 is provided with a bracket spring 38, and the bracket spring 38 is connected between the first shaft 311 and the neutral pole moving contact 32. The bracket spring 38 is used to drive the neutral pole moving contact 32 to rotate, so that the blocking portion 321 of the neutral pole moving contact 32 In contact with the first shaft 311, when the blocking part 321 contacts with the first shaft 311, the bracket 31 drives the neutral pole moving contact 32 to rotate around the first shaft 311 and contact and separate with the neutral pole static contact 33. The neutral pole static contact 33 can block the neutral pole moving contact 32 from rotating around the first shaft 311, so that the blocking part 321 is separated from the first shaft 311. When the blocking part 321 is separated from the first shaft 311, the second shaft 312 drives the neutral pole moving contact 32 to rotate relative to the bracket 31 and stores energy for the bracket spring 38, so that the bracket spring 38 drives the neutral pole moving contact 32 to be pressed against the neutral pole static contact 33. Obviously, the first shaft 311 can also be set on the housing 1, and the support spring 38 can also be connected between the housing and the neutral pole moving contact 32. In this embodiment, the support spring 38 is set on the support 31, and the support spring 38 is connected between the first shaft 311 and the neutral pole moving contact 32, so that the support 31, the moving contact 32 and the support spring 38 can form an integral structure, simplifying the structure.

[0058] 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 first axis 311 as the center until the contact portion 322 on the neutral pole moving contact 32 contacts the neutral pole static contact 33. When the contact portion 322 of the neutral pole moving contact 32 contacts the neutral pole static contact 33, the second axis 312 is no longer used as the center of the neutral pole moving contact 32, and the bracket The bracket 31 continues to rotate around the first shaft 311 and pushes the neutral pole moving contact 32 through the second shaft 312, so that the neutral pole moving contact 32 rotates around the contact position between the contact portion 322 and the neutral pole static contact 33, and then the bracket 31 and the neutral pole moving contact 32 rotate relatively, and the blocking portion 321 of the neutral pole moving contact 32 separates from the first shaft 311 and compresses the bracket spring 38, so that the bracket spring 38 pushes the contact portion 322 of the neutral pole moving contact 32 to press on the neutral pole static contact 33;

[0059] 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, so that the bracket 31 rotates around the first axis 311, and pushes the neutral pole moving contact 32 through the second axis 312, so that the neutral pole moving contact 32 rotates around the contact position between the contact portion 322 and the neutral pole static contact 33. At the same time, the bracket spring 38 pushes the neutral pole moving contact 32 until the neutral pole moving contact 32 drives the blocking portion 321 to contact the first axis 311, and then the neutral pole moving contact 32 rotates with the bracket 31 around the first axis 311, driving the contact portion 322 to separate from the neutral pole static contact 33.

[0060] In the phase-pole plus neutral-pole residual current operated circuit breaker of this embodiment, the neutral-pole moving contact 32 is rotatably set on a rotatable bracket 31, and a bracket spring 38 for pushing the neutral-pole moving contact 32 is set on the bracket 31. 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.

[0061] like Figure 6 As shown, the support spring 38 of this embodiment is a torsion spring, and the support spring 38 includes a spiral portion rotatably arranged on the support 31, and a support portion 381 and a contact portion 382 respectively arranged at both ends of the spiral portion, and a protruding spring portion 323 is provided on the side of the neutral pole moving contact 32, and the support portion 381 and the contact portion 382 are located between the first shaft 311 and the spring portion 323, and the support portion 381 and the contact portion 382 are respectively pressed on the first shaft 311 and the spring portion 323, when the support 31 and the neutral pole moving contact 32 rotate relative to each other, the distance between the first shaft 311 and the spring portion 323 is driven to change, and the support spring 38 is compressed and released by the first shaft 311 and the spring portion 323. Of course, the support spring 38 can also adopt other structures, such as a compression spring with two ends respectively connected to the first shaft 311 and the spring portion 323, and the first shaft 311 and the spring portion 323 compress and release the compression spring, which all belong to the protection scope of the utility model.

[0062] like Figure 6-7As shown, the neutral pole 3 also includes a neutral pole contact spring 35 connected to the neutral pole moving contact 32, and the neutral pole moving contact 32 is provided with a connecting structure 324 located between the first shaft 311 and the second shaft 312, and the connecting structure 324 is used to connect the neutral pole contact spring 35, and the neutral pole contact spring 35 is used to apply a torque rotating in a first direction to the neutral pole moving contact 32 when the neutral pole moving contact 32 rotates around the second shaft 312 as the center, so that the neutral pole moving contact 32 The contact portion 322 of the contact 32 is away from the neutral pole static contact 33. When the neutral pole moving contact 32 rotates around the contact position of the contact portion 322 and the neutral pole static contact 33, the neutral pole contact spring 35 is used to apply a torque rotating along a second direction to the neutral pole moving contact 32, so that the contact portion 322 of the neutral pole moving contact 32 is pressed against the neutral pole static contact 33. The first direction is opposite to the second direction, the first direction is the counterclockwise direction in the figure, and the second direction is the clockwise direction in the figure.

[0063] In this embodiment, the neutral pole contact spring 35 is connected to the connection structure 324 of the neutral pole moving contact 32 located between the first shaft 311 and the second shaft 312, so that the neutral pole contact spring 35 can drive the neutral pole moving contact 32 to rotate in two opposite directions respectively, respectively, and provide the neutral pole moving contact 32 with a final pressure and a reset force, respectively, and the neutral pole contact spring 35 can provide the neutral pole moving contact 32 with a combined force of the support spring 38, avoiding the neutral pole contact spring 35 or the support spring 38 from providing the final pressure alone, and 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 all falls within the protection scope of the utility model.

[0064] like Figure 6 As shown, the neutral pole contact spring 35 of this embodiment is a tension spring, and the neutral pole contact spring 35 is arranged on the side of the neutral pole moving contact 32 away from the neutral pole static contact 33, and is located between the bracket 31 and the terminal. The housing 1 is provided with a spring shaft 105 for connecting the neutral pole contact spring 35, and the connecting structure 324 is a through hole arranged on the neutral pole moving contact 32, and the two ends of the neutral pole contact spring 35 are respectively connected to the through hole and the spring shaft 105.

[0065] 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 connecting structure 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.

[0066] like Figure 8The 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, the phase pole connecting rod 216, the phase pole lever 211 and the housing 1 of the phase pole operating mechanism form a four-bar linkage with one degree of freedom. The neutral pole lever, the driving rod 34, the bracket 31 and the housing 1 of the leakage tripping mechanism form a four-bar linkage. Under the action of the bracket spring 38, the neutral pole moving contact 32 is tightly attached to the bracket 31 as a whole and rotates around the first axis 311. The neutral pole contact spring 35 provides force for resetting the mechanism.

[0067] like Fig. 9 The mechanical principle diagram when the neutral pole moving contact 32 contacts the neutral pole static contact 33 is shown. The phase pole handle 25, phase pole connecting rod 216, phase pole lever 211 and housing 1 of the phase pole operating mechanism form a four-bar linkage with one degree of freedom. The phase pole lever 211, driving rod 34, bracket 31 and partition 10 form a second four-bar linkage. The neutral pole contact spring 35 and bracket spring 38 provide the neutral pole moving contact 32 with a torque centered on the second axis 312. The torque separates the blocking portion 321 of the neutral pole moving contact 32 from the first axis 311 and generates a final pressure between the contact portion 322 and the neutral pole static contact 33. The combined force of the neutral pole contact spring 35 and the final pressure serves as the resetting force of the second four-bar linkage.

[0068] like Figure 10-11 As shown, the bracket 31 includes two supporting plates 313 arranged opposite to each other, and a supporting seat 314 connected between the two supporting plates 313, and the supporting seat 314 is rotatably connected to the driving rod 34.

[0069] A bracket groove for avoiding the neutral pole moving contact 32 is provided between the two support plates 313, the second shaft 312 passes through the bracket groove and is rotatably connected to the bracket 31, the middle part of the first shaft 311 passes through the bracket groove to block the blocking part 321 of the neutral pole moving contact 32, and the two ends of the first shaft 311 are relatively arranged on both sides of the bracket and are rotatably connected to the shell 1.

[0070] It is understandable that only one support plate 313 may be provided, the support seat 314 may be provided at one end of the support plate 313, or the support seat 314 may be formed by one end of the support plate 313, and the neutral pole moving contact 32 may be provided on the side of the support plate 313, all of which fall within the protection scope of the present utility model.

[0071] Further, the support plate 313 is of a V-shaped structure, and the support plate 313 includes a first support rod 3131 and a second support rod 3132 which are arranged relatively spaced apart and connected at one end, the neutral pole spring 35 is inserted into the first support rod 3131 and the second support rod 3132 to be connected to the neutral pole moving contact 32, a first bracket hole 3133 for passing the first shaft 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 first shaft 311, the second support rod 3132 is provided with a second bracket hole 3134 for passing the second shaft 312 at one end away from the first support rod 3131, the second bracket hole 3134 is rotatably connected to the second shaft 312, the first support rod 3131 is connected to the support seat 314 at one end away from the second support rod 3132, the support seat 314 is provided with a third bracket hole 3135 for passing the drive shaft 342, and the support seat 314 and the drive rod 34 are rotatably connected to the support seat 314 via the drive shaft 342.

[0072] 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 first support rod 3131 and the second support rod 3132 connection structure 324 can not only make the first support rod 3131 and the second support rod 3132 structure more reliable, but also leave space for the neutral pole moving contact 32 to connect with the neutral pole contact spring 35, and has the characteristics of compact structure. Of course, the first shaft 311 and the second shaft 312 can also be integrally formed with the bracket 31, which belongs to the protection scope of the present utility model.

[0073] like Fig.12 As shown, a supporting hole 325 for passing the second shaft 312 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 of the neutral pole moving contact 32, an avoidance groove 329 is provided between the supporting hole 325 and the contact portion 322, a blocking portion 321 protruding in a direction away from the contact portion 322 is provided on the side of the supporting hole 325 away from the contact portion 322, a connecting portion 326 is provided on the side between the blocking portion 321 and the supporting hole 325, the connecting portion 326 is provided with a connecting structure 324 for connecting the neutral pole contact spring 35, a spring portion 323 is provided on the side of the connecting portion 326 close to the contact portion 322, the spring portion 323 is located on the side of the neutral pole moving contact 32, and the spring portion 323 is arranged parallel to the first shaft 311.

[0074] like Figure 13-14As 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 second through hole 326 of the neutral pole moving contact 32, 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.

[0075] 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.

[0076] 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). The driving rod (34) is connected between the neutral pole moving contact (32) and the phase pole operating mechanism of the phase pole (2), and is characterized in that: The neutral pole (3) is provided with a rotatable bracket (31), the bracket (31) is provided with a second shaft (312), the neutral pole moving contact (32) is rotatably arranged on the second shaft (312), and the phase pole operating mechanism drives the bracket (31) to rotate around the first shaft (311) through a 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 when the neutral pole moving contact (32) contacts with 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: The support spring (38) is arranged on the support (31). When the switch is closed, after the neutral pole moving contact (32) contacts the neutral pole static contact (33), the phase pole operating mechanism drives the support (31) through the driving rod (34), so that the support (31) can continue to rotate relative to the neutral pole moving contact (32) and compress the support spring (38), so that the support spring (38) pushes the neutral pole moving contact (32) to be pressed against the neutral pole static contact (33).

3. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 2, characterized in that: The neutral pole moving contact (32) is provided with a blocking portion (321), and the support spring (38) is connected between the first shaft (311) and the neutral pole moving contact (32). The support spring (38) drives the neutral pole moving contact (32) to rotate, so that the blocking portion (321) of the neutral pole moving contact (32) contacts the first shaft (311).

4. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 3, 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 first axis (311) until the contact portion (322) on the neutral pole moving contact (32) contacts the neutral pole static contact (33). When the contact portion (322) of the neutral pole moving contact (32) contacts the neutral pole static contact (33), the bracket (31) continues to rotate around the first shaft (311) and pushes the neutral pole moving contact (32) through the second shaft (312), so that the neutral pole moving contact (32) rotates around the contact position between the contact portion (322) and the neutral pole static contact (33), and then the bracket (31) and the neutral pole moving contact (32) rotate relatively, and the blocking portion (321) of the neutral pole moving contact (32) separates from the first shaft (311) and compresses the bracket spring (38), so that the bracket spring (38) pushes the contact portion (322) of the neutral pole moving contact (32) to be pressed against the neutral pole static contact (33); When the switch is opened, the phase pole operating mechanism pushes the bracket (31) through the driving rod (34), so that the bracket (31) rotates around the first axis (311), and pushes the neutral pole moving contact (32) through the second axis (312), so that the neutral pole moving contact (32) rotates around the contact position between the contact portion (322) and the neutral pole static contact (33), and at the same time, the bracket spring (38) pushes the neutral pole moving contact (32) until the neutral pole moving contact (32) drives the blocking portion (321) to contact the first axis (311), and then the neutral pole moving contact (32) rotates with the bracket (31) around the first axis (311), driving the contact portion (322) to separate from the neutral pole static contact (33).

5. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 1, characterized in that: The invention also comprises a neutral pole contact spring (35) connected to the neutral pole moving contact (32); when the neutral pole moving contact (32) rotates around the second axis (312), the neutral pole contact spring (35) applies a torque rotating in a first direction to the neutral pole moving contact (32), so that the contact portion (322) of the neutral pole moving contact (32) moves away from the neutral pole static contact (33); when the neutral pole moving contact (32) rotates around the contact position between the contact portion (322) and the neutral pole static contact (33), the neutral pole contact spring (35) applies a torque rotating in a second direction to the neutral pole moving contact (32), so that the contact portion (322) of the neutral pole moving contact (32) is pressed against the neutral pole static contact (33); the first direction and the second direction are opposite.

6. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 5, characterized in that: The neutral pole moving contact (32) is provided with a connection structure (324) located between the first shaft (311) and the second shaft (312); the connection structure (324) is used to connect a neutral pole contact spring (35); the neutral pole contact spring (35) is a tension spring; the neutral pole contact spring (35) is arranged on a side of the neutral pole moving contact (32) away from the neutral pole static contact (33) and is located between the bracket (31) and the wiring terminal; the housing (1) is provided with a spring shaft (105) for connecting the neutral pole contact spring (35).

7. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 3, characterized in that: The support spring (38) is a torsion spring. The support spring (38) comprises a spiral portion rotatably arranged on the support (31), and a support portion (381) and a contact portion (382) respectively arranged at two ends of the spiral portion. A protruding spring portion (323) is provided on the side of the neutral pole moving contact (32). The support portion (381) and the contact portion (382) are located between the first shaft (311) and the spring portion (323), and the support portion (381) and the contact portion (382) are respectively pressed against the first shaft (311) and the spring portion (323). When the support (31) and the neutral pole moving contact (32) rotate relative to each other, the distance between the first shaft (311) and the spring portion (323) is driven to change, and the support spring (38) is compressed and released through the first shaft (311) and the spring portion (323).

8. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 1, characterized in that: The bracket (31) comprises a support plate (313), and the support plate (313) comprises a first support rod (3131) and a second support rod (3132) connected at one end; a first bracket hole (3133) for passing the first shaft (311) is provided at the connection between the first support rod (3131) and the second support rod (3132); an end of the second support rod (3132) away from the first support rod (3131) is provided with a second bracket hole (3134) for passing the second shaft (312); an end of the first support rod (3131) away from the second support rod (3132) is connected to a support seat (314); the support seat (314) is provided with a third bracket hole (3135) for passing the driving shaft (342); and the support seat (314) is rotatably connected to the driving rod (34) via the driving shaft (342).

9. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 8, characterized in that: The bracket (31) comprises two support plates (313), the two support plates (313) are arranged opposite to each other, the support seat (314) is connected between the two support plates (313), a bracket groove for avoiding the neutral pole moving contact (32) is provided between the two support plates (313), the second shaft (312) passes through the bracket groove and is rotatably connected to the bracket (31), the middle part of the first shaft (311) passes through the bracket groove and is used to block a blocking part (321) of the neutral pole moving contact (32), and the two ends of the first shaft (311) are arranged opposite to each other on both sides of the bracket and are rotatably connected to the housing (1).

10. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 8, characterized in that: The angle between the first support rod (3131) and the second support rod (3132) is greater than or equal to 90 degrees.

11. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 1, characterized in that: A supporting hole (325) for passing the second shaft (312) 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 avoidance groove (329) is provided between the supporting hole (325) and the contact portion (322); a blocking portion (321) protruding in a direction away from the contact portion (322) is provided on the side of the supporting hole (325) away from the contact portion (322); a connecting portion (326) is provided on the side between the blocking portion (321) and the supporting hole (325); a connecting structure (324) for connecting the neutral pole contact spring (35) is provided on the connecting portion (326); a spring portion (323) is provided on the side of the connecting portion (326) close to the contact portion (322); and the spring portion (323) is located on the side of the neutral pole moving contact (32).

12. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 11, characterized in that: The spring portion (323) is arranged parallel to the first shaft (311).

13. 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 the 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) through a phase pole connecting rod (216), and the phase pole lever (211) can drive the contact support (212) to rotate when rotating; the driving rod (34) is connected between the neutral pole moving contact (32) and the phase pole lever (211) of the phase pole (2).

14. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 13, 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).

15. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 14, characterized in that: The phase pole lock buckle (215) is rotatably arranged on the connecting shaft (343).

Images