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 phase pole comprises a phase pole operating mechanism, a phase pole moving contact, a phase pole static contact and a phase pole handle. The neutral pole comprises a neutral pole moving contact, a neutral pole static contact, a driving rod and a neutral pole contact spring, the driving rod is connected between the neutral pole moving contact and a phase pole operating mechanism of the phase pole, the neutral pole contact spring is connected with the neutral pole moving contact, the partition plate is provided with a guide groove, and the guide groove is connected with the neutral pole static contact. The neutral pole moving contact is provided with a guide shaft inserted into the guide groove, the phase pole operating mechanism drives the neutral pole moving contact to rotate around the guide shaft through a driving rod, and the guide shaft can be driven by the neutral pole moving contact to be switched between a closing position and an opening position of the guide groove. And the neutral pole moving contact and the neutral pole static contact are contacted and separated.

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 existing neutral pole has a complex structure of a neutral pole moving contact, has many transmission components, and has poor reliability. 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, a driving rod, and a neutral pole contact spring. The driving rod is connected between the neutral pole moving contact and the phase pole operating mechanism of the phase pole. The neutral pole contact spring is connected to the neutral pole moving contact.

[0008] The partition is provided with a guide groove, and the neutral pole moving contact is provided with a guide shaft inserted into the guide groove.

[0009] The phase pole operating mechanism drives the neutral pole moving contact to rotate around the guide shaft through the driving rod, and the guide shaft can be switched between the closing position and the opening position of the guide groove under the drive of the neutral pole moving contact, so that the neutral pole moving contact and the neutral pole static contact are in contact and separated;

[0010] When the neutral pole moving contact contacts the neutral pole static contact, the neutral pole contact spring drives the neutral pole moving contact to be pressed against the neutral pole static contact.

[0011] Preferably, when the phase pole operating mechanism drives the phase pole moving contact to move close to the phase pole static contact, the phase pole operating mechanism pushes the neutral pole moving contact through the driving rod, firstly causing the neutral pole moving contact to rotate with the guide shaft at the opening position as the rotation center until the contact portion on the neutral pole moving contact contacts the neutral pole static contact, and then causing the neutral pole moving contact to rotate with the contact position between the contact portion and the neutral pole static contact as the rotation center, driving the guide shaft to move from the opening position to the closing position, and at the same time, the neutral pole moving contact stretches the neutral pole contact spring, and the neutral pole contact spring is used to pull the neutral pole moving contact so that the contact portion is pressed tightly against the neutral pole static contact;

[0012] When the phase pole operating mechanism drives the phase pole moving contact to move away from the phase pole static contact, the phase pole operating mechanism pushes the neutral pole moving contact through the driving rod, first causing the neutral pole moving contact to rotate with the contact position between the contact part and the neutral pole static contact as the rotation center, driving the guide shaft to move from the closing position to the opening position, and then causing the neutral pole moving contact to rotate with the guide shaft at the opening position as the rotation center until the contact part on the neutral pole moving contact is separated from the neutral pole static contact.

[0013] Preferably, a third position is further provided in the guide groove, the opening position and the third position are relatively arranged at two ends of the guide groove, and the closing position is arranged between the opening position and the third position.

[0014] Preferably, the guide groove is in an arc shape, the closing position is arranged in the middle of the guide groove, and the middle of the guide groove protrudes toward a side away from the neutral pole static contact.

[0015] Preferably, the guide shaft is an insulator, the neutral pole moving contact is provided with a third through hole for connecting the guide shaft, one end of the guide shaft is inserted into the third through hole for fixed connection, and the other end of the guide shaft is inserted into the guide groove for sliding fit.

[0016] Preferably, the neutral pole moving contact comprises a rotating plate and a contact rod connected to the rotating plate, the rotating plate is connected to the neutral pole contact spring, and the contact rod is provided with a contact portion for contacting the neutral pole static contact.

[0017] Preferably, the rotating plate is provided with a first through hole and a second through hole, the second through hole is used to connect the driving rod, the shell is provided with a spring shaft for connecting the neutral pole contact spring, the first through hole is located between the spring shaft and the second through hole, and the two ends of the neutral pole contact spring are respectively connected to the spring shaft and the first through hole.

[0018] Preferably, the contact portion is located on an extension line of a line connecting the center of the first through hole and the axis of the guide shaft.

[0019] Preferably, a bent portion bent in a direction away from the neutral pole static contact is provided in the middle of the contact rod, and an avoidance groove is provided on the side of the bent portion close to the neutral pole static contact.

[0020] 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.

[0021] 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 second through hole of the neutral pole moving contact so that the driving rod is rotatably connected with the neutral pole moving contact, and the phase pole lever 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.

[0022] Preferably, the phase pole lock is rotatably arranged on the connecting shaft.

[0023] 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 pole loop and the phase pole 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 pole lock of the phase pole operating mechanism to release the snap-fit ​​between the phase pole lock and the phase pole jumper.

[0024] Preferably, 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 through a neutral pole connecting rod, and the neutral pole lock buckle is snap-fitted with the neutral pole jump buckle.

[0025] Preferably, the phase pole handle is fixedly connected to the leakage handle.

[0026] 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.

[0027] 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 pole lock to release the snap fit with the phase pole jumper.

[0028] The phase-pole plus neutral-pole residual current operated circuit breaker of the utility model does not have an independent neutral-pole operating mechanism, simplifies the structure of the circuit breaker, drives the driving rod through the phase-pole lever, and drives the neutral-pole moving contact to contact and separate with the neutral-pole static contact, a guide groove is provided on the partition, and a guide shaft for inserting into the guide groove and sliding is provided on the neutral-pole moving contact, so that the neutral-pole moving contact moves in the direction in which the guide shaft slides in the guide groove, and at the same time rotates with the guide shaft as the rotation center to realize opening and closing, which can simplify the structure of the neutral-pole moving contact and improve the strength of the neutral-pole moving contact.

[0029] In addition, by placing the leakage module and the neutral pole together, the layout of the circuit breaker is optimized so that the thickness of the circuit breaker can be reduced to 36 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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;

[0031] Figure 2 It is a schematic diagram of the structure of the phase pole when the phase pole static contact and the phase pole moving contact of the utility model are separated;

[0032] Figure 3 It is a structural schematic diagram of the neutral pole when the phase pole static contact and the phase pole moving contact of the utility model are in contact;

[0033] 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;

[0034] 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;

[0035] 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;

[0036] Figure 7 It is the mechanical principle diagram of the utility model in the open gate position;

[0037] Figure 8 It is the mechanical principle diagram of the closing position of the utility model;

[0038] Fig. 9 It is a structural schematic diagram of the neutral pole moving contact of the utility model;

[0039] Fig.10 It is a structural schematic diagram of the utility model partition;

[0040] Fig.11 It is a structural schematic diagram of the driving rod of the utility model;

[0041] Fig.12 It is a structural schematic diagram of the phase lever of the utility model;

[0042] 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; neutral pole moving contact 32; neutral pole static contact 33; drive rod 34; neutral pole contact spring 35; Leakage handle 36; leakage protection mechanism 37; neutral pole guide groove 101; guide shaft 321; contact portion 322; opening position 102; closing position 103; third position 104; rotating plate 323; contact rod 324; first through hole 325; second through hole 326; third through hole 327; spring shaft 105; bending portion 328; avoidance groove 329; driving hole 341; driving shaft 342; connecting shaft 343; connecting groove 344. DETAILED DESCRIPTION

[0043] 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.

[0044] 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 .

[0045] 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. 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;

[0046] 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.

[0047] 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.

[0048] 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.

[0049] like Figure 4-5 As shown, the neutral pole 3 includes a neutral pole moving contact 32, a neutral pole static contact 33, a driving rod 34, and a neutral pole contact spring 35. The neutral pole moving contact 32 and the neutral pole static contact 33 are connected to the neutral pole circuit to form a part of the neutral pole circuit. The neutral pole moving contact 32 and the neutral pole static contact 33 are respectively connected to the neutral pole circuit through the neutral pole first terminal and the neutral pole second 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 2. The neutral pole contact spring 35 is connected to the neutral pole moving contact 32, and 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, and the driving rod 34 drives the neutral pole moving contact 32 to contact and separate with the neutral pole static contact 33. When the neutral pole moving contact 32 contacts with the neutral pole static contact 33, the neutral pole contact spring 35 drives the neutral pole moving contact 32 to be pressed against 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.

[0050] 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.

[0051] A leakage protection mechanism 37 and a leakage tripping mechanism are also provided in the neutral pole 3. The leakage protection mechanism 37 is used to detect leakage current. When a leakage fault occurs, the leakage tripping mechanism is driven to trip the phase pole operating mechanism, 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.

[0052] A specific embodiment of a leakage tripping mechanism, the leakage tripping mechanism includes a neutral pole lever and a neutral pole jump buckle and a neutral pole lock buckle respectively rotatably arranged on the neutral pole lever, which are not shown in the figure. The neutral pole lever is connected to the neutral pole mechanism spring, and the neutral pole jump buckle is connected to the leakage handle 36 through the neutral pole connecting rod. 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, the neutral pole jump buckle can drive the neutral pole lever to rotate, and the leakage handle 36 is linked with the phase pole handle 25. 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. When the driving rod 34 drives the neutral pole moving contact 32 to contact the neutral pole static contact 33, it drives the leakage handle 36 to rotate, and the leakage handle 36 drives the neutral pole lever to compress the neutral pole mechanism spring.

[0053] The leakage protection mechanism 37 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 through the neutral pole jump button. Or drive the neutral pole lever to rotate, and release the neutral pole mechanism spring, 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 releases the snap fit between the phase pole lock 215 and the phase pole jump buckle 214, 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.

[0054] 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 37 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.

[0055] 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.

[0056] An improvement of the present application is that the partition 10 is provided with a guide groove 101, the neutral pole moving contact 32 is provided with a guide shaft 321 for inserting into the guide groove 101 and sliding, the phase pole operating mechanism drives the neutral pole moving contact 32 to rotate around the guide shaft 321 through the driving rod 34, and the guide shaft 321 can be driven by the neutral pole moving contact 32 to switch between the closing position 103 and the opening position 102 of the guide groove 101, so that the neutral pole moving contact 32 is in contact with and separated from the neutral pole static contact 33, the neutral pole contact spring 35 is connected to the neutral pole moving contact 32, and the driving rod 34 is connected between the neutral pole moving contact 32 and the phase pole lever 211 of the phase pole 2;

[0057] When the phase pole operating mechanism drives the phase pole moving contact 22 to move close to the phase pole static contact 23, the phase pole lever 211 pushes the neutral pole moving contact 32 through the driving rod 34, and firstly makes the neutral pole moving contact 32 rotate with the guide shaft 321 at the opening position 102 as the rotation center, until the contact part 322 on the neutral pole moving contact 32 contacts the neutral pole static contact 33, and then makes the neutral pole moving contact 32 rotate with the contact position between the contact part 322 and the neutral pole static contact 33 as the rotation center, driving the guide shaft 321 to move from the opening position 102 to the closing position 103, and at the same time, the neutral pole moving contact 32 stretches the neutral pole contact spring 35, and the neutral pole contact spring 35 is used to pull the neutral pole moving contact 32, so that the contact part 322 is pressed against the neutral pole static contact 33;

[0058] When the phase pole operating mechanism drives the phase pole moving contact 22 to move away from the phase pole static contact 23, the phase pole lever 211 pushes the neutral pole moving contact 32 through the driving rod 34, firstly causing the neutral pole moving contact 32 to rotate with the contact position between the contact portion 322 and the neutral pole static contact 33 as the rotation center, driving the guide shaft 321 to move from the closing position 103 to the opening position 102, and then causing the neutral pole moving contact 32 to rotate with the guide shaft 321 at the opening position 102 as the rotation center, until the contact portion 322 on the neutral pole moving contact 32 is separated from the neutral pole static contact 33.

[0059] The phase-pole plus neutral-pole residual current operated circuit breaker of this embodiment is provided with a guide groove 101 on the partition 10, and a guide shaft 321 for inserting into the guide groove 101 and sliding on the neutral-pole moving contact 32, so that the neutral-pole moving contact 32 moves in the direction in which the guide shaft 321 slides in the guide groove 101, and at the same time rotates with the guide shaft 321 as the rotation center to realize opening and closing, which can simplify the structure of the neutral-pole moving contact 32 and improve the strength of the neutral-pole moving contact 32.

[0060] In addition, there is no need to arrange a neutral pole bracket and a corresponding elastic member between the neutral pole moving contact 32 and the driving rod 34, which can further simplify the structure of the central mechanism.

[0061] It can be understood that the arc extinguishing chamber 24, phase pole operating mechanism, short circuit protection mechanism 27, overload protection mechanism 26, and leakage protection mechanism 37 can all be realized by existing technologies.

[0062] like Figure 7 A mechanical schematic diagram of the open state is shown, in which the guide shaft 321 is located at the open position 102, and 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, and the neutral pole lever, the driving rod 34, the neutral pole moving contact 32, the guide groove 101 on the partition 10 and the partition 10 of the leakage tripping mechanism form a four-bar linkage, with a total of three moving parts except the partition 10, the guide shaft 321 on the neutral pole moving contact 32 is located at one end of the guide groove 101 close to the neutral pole static contact 33, and the guide shaft 321 is hinged to one end of the guide groove 101 close to the neutral pole static contact 33, and the neutral pole moving contact 32 rotates around the guide shaft 321 under the action of the force F of the neutral pole contact spring 35, and the neutral pole contact spring 35 provides a force for resetting the mechanism.

[0063] like Figure 8 The mechanical schematic diagram of the closing state is shown, in which the guide shaft 321 is located at the closing position 103, and 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 guide shaft 321 on the neutral pole moving contact 32 is located in the middle position of the guide groove 101, and the neutral pole moving contact 32 is in contact with the neutral pole static contact 33. The phase pole lever 211, the driving rod 34, the neutral pole moving contact 32, the guide groove 101 and the partition 10 form a four-bar linkage equivalent to a five-bar linkage. There are three moving parts in total except the partition 10. At the same time, the neutral pole contact spring 35 provides a torque for the neutral pole moving contact 32 to rotate clockwise with the guide shaft 321 as the rotation center, so that pressure is generated between the neutral pole moving contact 32 and the neutral pole static contact 33.

[0064] like Figure 8As shown, a third position 104 is also provided in the guide groove 101, the opening position 102 and the third position 104 are relatively arranged at the two ends of the guide groove 101, the shape of the guide groove 101 is arc-shaped, and the shape of the guide groove 101 matches the trajectory of the guide shaft 321 when it rotates around the contact position of the contact portion 322 and the neutral pole static contact 33, the closing position 103 is set in the middle of the guide groove 101, located between the opening position 102 and the third position 104, and the middle of the guide groove 101 protrudes toward the side away from the neutral pole static contact 33.

[0065] like Figure 9-10 As shown, the neutral pole moving contact 32 includes a flat rotating plate 323, and a contact rod 324 connected to the rotating plate 323, the contact rod 324 is provided with a contact portion 322 for contacting the neutral pole static contact 33, the rotating plate 323 is provided with a first through hole 325, a second through hole 326 and a third through hole 327, the housing 1 is provided with a spring shaft 105 for connecting the neutral pole contact spring 35, the spring shaft 105 and the second through hole 326 are arranged on both sides of the first through hole 325, that is, the first through hole 327 is provided. 25 is located between the spring shaft 105 and the second through hole 326, the two ends of the neutral pole contact spring 35 are respectively connected to the spring shaft 105 and the first through hole 325, the second through hole 326 is used to connect the drive rod 34, the third through hole 327 is used to connect the guide shaft 321, the guide shaft 321 is vertically arranged with the rotating plate 323, one end of the guide shaft 321 is inserted into the third through hole 327 for fixed connection, and the end of the guide shaft 321 away from the third through hole 327 is inserted into the guide groove 101 on the partition 10 for sliding fit.

[0066] Furthermore, the guide shaft 321 is an insulator, which can insulate the phase pole 2. Of course, the guide shaft 321 is also an integrally formed conductor with the neutral pole moving contact 32, and an insulating part for insulating the guide shaft 321, such as an insulating plate, is provided at the phase pole 2.

[0067] Furthermore, the contact portion 322 is located on the extension line of the line connecting the center of the first through hole 325 and the axis of the guide shaft 321, and the middle part of the contact rod 324 is provided with a bending portion 328 bent in the direction away from the neutral pole static contact 33, and an avoidance groove 329 is provided on the side of the bending portion 328 close to the neutral pole static contact 33, and the avoidance groove 329 is used to avoid the boss structure in the shell 1 for fixing the circuit board, which is not shown in the figure.

[0068] 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 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.

[0069] 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.

[0070] 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), a driving rod (34), and a neutral pole contact spring (35); the driving rod (34) is connected between the neutral pole moving contact (32) and a phase pole operating mechanism of the phase pole (2); the neutral pole contact spring (35) is connected to the neutral pole moving contact (32), and is characterized in that: The partition plate (10) is provided with a guide groove (101), and the neutral pole moving contact (32) is provided with a guide shaft (321) inserted into the guide groove (101). The phase pole operating mechanism drives the neutral pole moving contact (32) to rotate around the guide shaft (321) through the driving rod (34), and the guide shaft (321) can be switched between the closing position (103) and the opening position (102) of the guide groove (101) under the drive of the neutral pole moving contact (32), so that the neutral pole moving contact (32) and the neutral pole static contact (33) are in contact and separated; When the neutral pole moving contact (32) contacts the neutral pole static contact (33), the neutral pole contact spring (35) drives 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 phase pole operating mechanism drives the phase pole moving contact (22) to move close to the phase pole static contact (23), the phase pole operating mechanism pushes the neutral pole moving contact (32) through the driving rod (34), firstly causing the neutral pole moving contact (32) to rotate around the guide shaft (321) at the opening position (102) as the rotation center until the contact portion (322) on the neutral pole moving contact (32) contacts the neutral pole static contact (33), and then causing the neutral pole moving contact (3 2) rotating with the contact position between the contact portion (322) and the neutral pole static contact (33) as the rotation center, driving the guide shaft (321) to move from the opening position (102) to the closing position (103), while the neutral pole moving contact (32) stretches the neutral pole contact spring (35), and the neutral pole contact spring (35) is used to pull the neutral pole moving contact (32), so that the contact portion (322) and the neutral pole static contact (33) are pressed tightly; When the phase pole operating mechanism drives the phase pole moving contact (22) to move away from the phase pole static contact (23), the phase pole operating mechanism pushes the neutral pole moving contact (32) through the driving rod (34), firstly causing the neutral pole moving contact (32) to rotate with the contact position between the contact portion (322) and the neutral pole static contact (33) as the rotation center, driving the guide shaft (321) to move from the closing position (103) to the opening position (102), and then causing the neutral pole moving contact (32) to rotate with the guide shaft (321) at the opening position (102) as the rotation center until the contact portion (322) on the neutral pole moving contact (32) is separated 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: A third position (104) is also provided in the guide groove (101); the opening position (102) and the third position (104) are relatively arranged at two ends of the guide groove (101); and the closing position (103) is arranged between the opening position (102) and the third position (104).

4. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 1, characterized in that: The guide groove (101) is in an arc shape, the closing position (103) is arranged in the middle of the guide groove (101), and the middle of the guide groove (101) protrudes toward a side away 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 guide shaft (321) is an insulator, and the neutral pole moving contact (32) is provided with a third through hole (327) for connecting the guide shaft (321). One end of the guide shaft (321) is inserted into the third through hole (327) for fixed connection, and the other end of the guide shaft (321) is inserted into the guide groove (101) for sliding fit.

6. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 1, characterized in that: The neutral pole moving contact (32) comprises a rotating plate (323) and a contact rod (324) connected to the rotating plate (323); the rotating plate (323) is connected to a neutral pole contact spring (35); and the contact rod (324) is provided with a contact portion (322) for contacting the neutral pole static contact (33).

7. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 6, characterized in that: The rotating plate (323) is provided with a first through hole (325) and a second through hole (326), the second through hole (326) being used to connect the driving rod (34), the housing (1) is provided with a spring shaft (105) being used to connect the neutral pole contact spring (35), the first through hole (325) being located between the spring shaft (105) and the second through hole (326), and the two ends of the neutral pole contact spring (35) being respectively connected to the spring shaft (105) and the first through hole (325).

8. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 7, characterized in that: The contact portion (322) is located on an extension line of a line connecting the center of the first through hole (325) and the axis of the guide shaft (321).

9. The phase-pole plus neutral-pole residual current operated circuit breaker according to claim 6, characterized in that: A bent portion (328) is provided in the middle of the contact rod (324) and is bent in a direction away from the neutral pole static contact (33), and an avoidance groove (329) is provided on the side of the bent portion (328) close to the neutral pole static contact (33).

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 second through hole (326) of the neutral pole moving contact (32) so that the driving rod (34) and the neutral pole moving contact (32) are rotatably connected; the phase pole lever (211) 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).

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