breaker

Abstract

A circuit breaker comprises a shell, and a phase pole and a leakage protection pole of the circuit breaker arranged side by side on both sides of the shell, characterized in that: the leakage protection pole comprises a zero-sequence current transformer, a leakage operating mechanism, a leakage testing mechanism, and a neutral pole static contact and a neutral pole moving contact relatively arranged in the shell, the phase pole of the circuit breaker comprises a phase pole operating mechanism, and a static contact and a moving contact relatively arranged, the moving contact is connected to the phase pole operating mechanism, the main circuit of the phase pole of the circuit breaker passes through the zero-sequence current transformer, the testing mechanism forms a test circuit with double breakpoints through two contact points, a first contact part and a second contact part on an elastic part, and the first contact part is driven by a neutral line driving member connected to the neutral pole moving contact to contact the first contact member, the neutral line driving member is connected to the phase pole operating mechanism or the leakage operating mechanism, it can ensure that the test circuit is not turned on when the phase pole of the circuit breaker is opened by pressing the test button, thereby improving the reliability of the circuit breaker.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, in particular to a circuit breaker. Background Art

[0002] Due to the limitation of shell space, the test mechanism of the circuit breaker usually adopts a single breakpoint structure for the test circuit of the test mechanism. However, when the circuit breaker is opened, if the test button of the test mechanism is pressed, the output terminal of the circuit breaker will have a voltage to the ground due to the conduction of the test circuit, which may lead to the risk of electric shock during use. It also does not meet the safety regulations of specific areas and has certain limitations. Therefore, some circuit breakers change the test circuit of the test mechanism to a double breakpoint structure. One of the double breakpoints is controlled by a handle. The test circuit will be turned on only when the test button is pressed when the handle is closed. However, the turn-on and turn-off speeds of the breakpoints are affected by the closing and opening speeds of the handle. If the handle has a slow reset problem, the breakpoint disconnection speed will be slow. At this time, if the circuit breaker is reversed, pressing the test button will cause the test circuit to disconnect slowly, causing the coil of the circuit breaker to heat up and burn, resulting in circuit breaker failure, which seriously affects the reliability of the circuit breaker. Summary of the invention

[0003] The purpose of the invention is to overcome the defects of the prior art and provide a circuit breaker with simple structure and high reliability.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A circuit breaker comprises a housing and a circuit breaker phase pole and a leakage protection pole arranged side by side on both sides of the housing, wherein the leakage protection pole comprises a zero-sequence current transformer, a leakage operating mechanism, a leakage testing mechanism, and a neutral pole static contact and a neutral pole moving contact arranged relatively in the housing, the circuit breaker phase pole comprises a phase pole operating mechanism, and a static contact and a moving contact arranged relatively, the moving contact is connected to the phase pole operating mechanism, and the main circuit of the circuit breaker phase pole passes through the zero-sequence current transformer;

[0006] The leakage test mechanism includes an elastic member, a test button, and a first contact member and a second contact member respectively connected to the two ends of the test circuit. The neutral pole moving contact is connected to the leakage operating mechanism or the phase pole operating mechanism through a neutral line driving member. One end of the elastic member is provided with a first contact portion cooperating with the neutral line driving member, and the other end of the elastic member is provided with a second contact portion extending between the second contact member and the test button; the test button can push the second contact portion to contact the second contact member, and the neutral line driving member pushes the first contact portion to contact the first contact member when the circuit breaker is closed.

[0007] Preferably, the neutral line drive component includes a protection drive rod and a shaft-machine coupling drive rod, one end of the protection drive rod is connected to the neutral pole moving contact, and the other end of the protection drive rod is hinged to the leakage operating mechanism through the shaft-machine coupling drive rod; the first contact portion of the elastic member cooperates with the shaft-machine coupling drive rod, the shaft-machine coupling drive rod pushes the first contact portion to contact the first contact member, and the neutral pole moving contact is connected to one end of the reset spring, and the other end of the reset spring is connected to the shell.

[0008] Preferably, the neutral line drive component includes a protection drive rod and a shaft-machine coupling drive rod, one end of the protection drive rod is connected to the neutral pole moving contact, and the other end of the protection drive rod is hinged to the phase pole operating mechanism through the shaft-machine coupling drive rod; the first contact portion of the elastic member cooperates with the protection drive rod, and the protection drive rod pushes the first contact portion to contact the first contact member, the neutral pole moving contact is connected to one end of the reset spring, and the other end of the reset spring is connected to the shell.

[0009] Preferably, the leakage operating mechanism includes a protection lever pivotally mounted in the shell, and a protection jump buckle and a protection lock buckle pivotally mounted on the protection lever and snap-fitted with each other, the protection jump buckle is hinged to one end of the protection connecting rod, and the other end of the protection connecting rod is hinged to the circuit breaker handle.

[0010] Preferably, one end of the return spring is connected to the neutral pole moving contact, and the other end is connected to the second contact piece.

[0011] Preferably, the elastic member is a torsion spring, and the elastic member includes a spiral portion connected between the first contact portion and the second contact portion, the spiral portion is sleeved on the spring shaft and connected to the shell, and the first contact portion and the second contact portion are both arranged perpendicular to the axis of the spiral portion; the second contact member is arranged on the side of the neutral pole moving contact close to the neutral pole static contact, the first contact member and the elastic member are arranged on the side of the neutral pole moving contact away from the neutral pole static contact, the neutral pole moving contact is connected to the second contact member through a reset spring, the second contact portion passes through one side of the neutral pole moving contact to cooperate with the second contact member, and the first contact member is connected to the test resistor arranged below the first contact member.

[0012] Preferably, the first contact piece and the shaft machine coupling drive rod are arranged on both sides of the elastic piece relative to each other, and a V-shaped fourth contact arm is provided on the first contact portion, one end of the fourth contact arm is inclined toward the side close to the shaft machine coupling drive rod, and the other end of the fourth contact arm is inclined toward the side close to the first contact piece.

[0013] Preferably, one end of the shaft-machine coupling drive rod is connected to one end of the protection drive rod, and the protection lever is provided with a shaft-machine coupling drive rod through hole that cooperates with the other end of the shaft-machine coupling drive rod; a contact drive rod rotatably connected to the neutral pole moving contact is provided at the other end of the protection drive rod; one end of the protection drive rod is stacked on the protection lever, and the neutral pole moving contact is stacked on the other end of the protection drive rod.

[0014] Preferably, a bent contact arm bent toward the first contact piece is provided at the end of the fourth contact arm, and the outer side of the bent contact arm contacts and cooperates with the first contact piece.

[0015] Preferably, a triangular moving contact guide groove is provided in the middle of the neutral pole moving contact, a moving contact guide column inserted into the moving contact guide groove is provided in the shell, one end of the reset spring is sleeved in the guide groove, and the neutral pole moving contact is respectively provided with a protective drive rod shaft hole and a neutral pole moving contact on both sides of the moving contact guide groove.

[0016] Preferably, the neutral pole moving contact is V-shaped, the middle part of the neutral pole moving contact protrudes toward the side close to the second contact piece, and an opening for avoiding the first contact piece is formed on the other side of the neutral pole moving contact, and the neutral pole moving contact and the protection drive rod shaft hole are respectively arranged at both ends of the V-shaped neutral pole moving contact.

[0017] Preferably, the test button includes a button connecting part and a button operating part and a button pushing part respectively arranged at two ends of the button connecting part, the other end of the button operating part extends out of the shell, the other end of the button pushing part cooperates with the first contact part, the button connecting part is connected to one end of the top side of the button pushing part, the other end of the top side of the button pushing part cooperates with the shell limit, and the first button pushing part and the second button pushing part are respectively extended to both sides of the first contact part on the bottom side of the button pushing part, and a button pushing groove that cooperates with the first contact part limit is formed between the first button pushing part and the second button pushing part.

[0018] Preferably, the leakage operating mechanism includes a protection lever pivotally mounted in the shell, and a protection jumper and a protection lock buckle pivotally mounted on the protection lever and snap-fitted with each other, the protection jumper is connected to the leakage protection handle through a protection connecting rod, the protection lock buckle is connected to the protection lever through a protection spring, the protection spring can drive the protection lock buckle and the protection jump buckle to keep energy storage, the leakage release of the leakage protection pole can unlock the protection lock buckle and the protection jump buckle when a leakage fault occurs, and the phase pole operating mechanism of the phase pole of the circuit breaker is provided with an unlocking lever extending to one side of the protection lever, and the phase pole operating mechanism is unlocked by the unlocking lever when the protection lock buckle and the protection jump buckle are unlocked.

[0019] Preferably, the phase pole operating mechanism includes a circuit breaker energy storage component, a rocker arm pivotally installed in the shell and connected to the moving contact, a phase pole support pivotally installed on the rocker arm, and a trip button and a lock button pivotally installed on the phase pole support and snap-fitted with each other. The trip button is connected to the phase pole handle through a connecting rod, and the phase pole support is connected to the shell through the circuit breaker energy storage component. When the trip button and the lock button snap-fit ​​with each other, the phase pole operating mechanism maintains balance, and the phase pole handle rotates in the closing direction to drive the moving contact to contact the static contact through the phase pole operating mechanism, and stores energy for the circuit breaker energy storage component; when the trip button and the lock button release the snap-fit, the energy storage component releases energy and drives the moving contact to separate from the static contact; an unlocking lever is provided on the lock button to cooperate with the leakage operating mechanism of the leakage protection pole.

[0020] Preferably, the spiral portion is arranged on a side close to the test button, the first contact portion is a U-shaped structure, the first contact portion includes a first contact arm and a third contact arm arranged opposite to each other, and a second contact arm vertically connected between one end of the first contact arm and the third contact arm, the second contact arm is arranged parallel to the axis of the spiral portion, one end of the second contact arm away from the first contact portion extends toward the swing plane of the protection drive rod, the other end of the first contact arm is connected to the spiral portion, the third contact arm extends between the protection drive rod and the second contact piece, and the third contact arm and the protection drive rod are arranged in the same plane.

[0021] Preferably, the other end of the third contact arm away from the second contact arm is connected to a fourth contact arm with a V-shaped structure, and the fourth contact arm extends between the protection drive rod and the second contact piece. The side of the fourth contact arm connected to the second contact arm is inclined toward the direction close to the protection drive rod, and the side of the other side of the fourth contact arm is inclined toward the direction close to the first contact piece to cooperate with the first contact piece. A bent portion that cooperates with the protection drive rod is formed at the connection between the two side edges of the fourth contact arm, and the protection drive rod makes the end of the fourth contact arm away from the second contact arm contact with the first contact piece by pushing the bent portion of the fourth contact arm.

[0022] Preferably, a bent contact arm is provided at one end of the fourth contact arm that cooperates with the first contact piece, and the bent contact arm is bent toward a side away from the first contact piece, forming an arc surface that cooperates with the first contact piece on the outer side of the bent contact arm.

[0023] Preferably, the circuit breaker handle includes a phase pole handle and a leakage protection handle, the phase pole handle is connected to the phase pole operating mechanism of the phase pole of the circuit breaker, the leakage protection handle is connected to the leakage operating mechanism of the leakage protection pole, and a pushing block is provided on the leakage protection handle, the pushing block extends to the side of the phase pole handle rotating in the closing direction, and when the leakage protection handle rotates in the opening direction in the event of leakage current, the phase pole handle is pushed to rotate in the opening direction by the pushing block; when an overload or short circuit current occurs, the phase pole handle rotates in the opening direction, but the leakage protection handle does not operate.

[0024] Preferably, a partition is provided between the phase pole and the leakage protection pole of the circuit breaker, the partition is provided with a spring shaft for installing the spiral part of the elastic member, the partition is provided with a stop block for limiting the protection driving rod, and the stop block cooperates with one end of the protection driving rod close to the neutral pole moving contact.

[0025] The circuit breaker created by the present invention has a test mechanism that forms a test circuit with double breakpoints through two contact points, a first contact part and a second contact part on the elastic member, and the first contact part is driven by a driving rod coupled with a moving shaft machine to contact the first contact member, which can not only ensure that the test circuit is not turned on when the test button is pressed when the circuit breaker phase is open, thereby further improving the reliability of the circuit breaker, but also the first contact part cooperates with the operating mechanism to improve the action speed of the operating mechanism, especially when the line is overloaded or has a leakage current, the circuit breaker can be tripped more quickly to cut off the line.

[0026] In addition, the elastic member adopts a torsion spring, which can not only be directly installed in the shell, but also the shell limits one end of the elastic member through the spring limiting groove, which can further reduce the difficulty of assembly and has the characteristics of simple structure and low cost.

[0027] In addition, by setting a shaft-machine coupling drive hole at one end of the protective drive rod and setting a contact drive rod at the other end of the protective drive rod, it has the characteristics of simple structure, easy processing and easy assembly, and the shaft-machine coupling drive boss can improve the strength of the connection between the shaft-machine coupling drive hole and the shaft-machine coupling drive rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a front view of a phase pole of a circuit breaker of the present invention;

[0029] Figure 2 It is a front view of the leakage protection electrode of the present invention;

[0030] Figure 3 It is a schematic diagram of the coordination between the leakage test mechanism and the leakage operation mechanism in the first embodiment of the present invention;

[0031] Figure 4 It is a schematic diagram of the coordination of the neutral pole moving contact, the protection driving rod and the protection lever in the first embodiment of the present invention;

[0032] Figure 5 The present invention Fig.12 Side view of

[0033] Figure 6 It is a schematic structural diagram of the elastic member of the present invention;

[0034] Figure 7 is a schematic structural diagram of a protection driving rod in Embodiment 1 of the present invention;

[0035] Figure 8 is a schematic diagram of the structure of a test button in Embodiment 1 of the present invention;

[0036] Fig. 9 It is a schematic diagram of the cooperation between the axle machine coupling driving rod and the protection lever in the first embodiment of the present invention;

[0037] Fig.10 is a top view of the elastic member of the present invention;

[0038] Fig.11 is a side view of the elastic member of the present invention;

[0039] Fig.12 It is a partial structural diagram of a circuit breaker in Embodiment 2 of the present invention;

[0040] Fig.13 It is a schematic diagram of the coordination between the leakage test mechanism and the leakage operation mechanism in the second embodiment of the present invention;

[0041] Fig.14 It is another schematic diagram of the coordination between the leakage test mechanism and the leakage operation mechanism in the second embodiment of the present invention;

[0042] Fig.15 is a schematic diagram of the structure of the leakage protection electrode in the second embodiment of the present invention;

[0043] Fig.16 is a structural schematic diagram of a phase pole operating mechanism in Embodiment 2 of the present invention;

[0044] Fig.17 It is a schematic diagram of the current flow direction in the leakage test circuit when the circuit breaker of the present invention is connected in a positive manner;

[0045] Fig.18 It is a schematic diagram of the current flow direction in the leakage test circuit when the circuit breaker of the present invention is reversely connected. DETAILED DESCRIPTION

[0046] The following is combined with Figures 1 to 18 The following embodiments are provided to further illustrate the specific implementation of the circuit breaker created by the present invention. The circuit breaker created by the present invention is not limited to the description of the following embodiments.

[0047] like Figure 1-2As shown, the circuit breaker created by the present invention includes a housing and a circuit breaker phase pole 1 and a leakage protection pole 2 arranged side by side on both sides of the housing, a partition 32 is provided between the circuit breaker phase pole 1 and the leakage protection pole 2, the circuit breaker phase pole 1 includes a static contact 111 and a moving contact 112 which are arranged opposite to each other and connected to the circuit respectively, the moving contact 112 is installed on the phase pole operating mechanism 14 to swing and cooperate with the static contact 111, the leakage protection pole 2 includes a zero-sequence current transformer 21, a leakage operating mechanism 22 and a leakage testing mechanism 25, the main circuit of the circuit breaker phase pole 1 passes through the zero-sequence current transformer 21, and the zero-sequence current transformer 21 can unlock the phase pole operating mechanism 14 through the leakage operating mechanism 22 to drive the moving contact 112 to separate from the static contact 111 when leakage current appears in the main circuit;

[0048] The leakage test mechanism 25 includes an elastic member 26, a test button 29, and a first contact member 27 and a second contact member 28 respectively connected to the main circuit of the phase pole 1 of the circuit breaker. One end of the elastic member 26 is provided with a first contact portion 261, and the other end of the elastic member 26 is provided with a second contact portion 262 that cooperates with the test button 29. When the phase pole 1 of the circuit breaker is closed, the leakage operating mechanism 22 or the phase pole operating mechanism 14 pushes the first contact portion 261 to contact the first contact member 27 through the neutral line driving member connected to the neutral pole moving contact 212. The test button 29 can push the second contact portion 262 to contact the second contact member 28. When the first contact portion 261 and the second contact portion 262 are in contact with the first contact member 27 and the second contact member 28 respectively, the test circuit can be turned on to generate a leakage test signal in the main circuit.

[0049] In the circuit breaker created by the present invention, the leakage test mechanism 25 forms a test circuit with double breakpoints through the two contacts of the first contact portion 261 and the second contact portion 262 on the elastic member 26, and the first contact portion 261 and the second contact portion 262 are driven by the operating mechanism and the test button 29 respectively, which can not only ensure that the test circuit is not turned on when the test button 29 is pressed when the phase pole 1 of the circuit breaker is opened, thereby improving the reliability of the circuit breaker, but also through the cooperation between the first contact portion 261 and the operating mechanism, the action speed of the operating mechanism can be improved, especially when the line is overloaded or has a leakage current, it can help the leakage operating mechanism 22 to trip the circuit breaker faster to cut off the line.

[0050] like Fig.10An embodiment of a phase-pole operating mechanism 14 is shown, which includes a circuit breaker energy storage component, a rocker arm 141 pivotally mounted in a housing and connected to a moving contact 112, a tripping catch 142 and a locking catch 143 pivotally mounted on the rocker arm 141 and snap-fitted with each other, and a connecting rod 144 hinged to the tripping catch 142, the other end of the connecting rod 144 being hinged to a circuit breaker handle 31 extending out of the housing. When the tripping catch 142 and the locking catch 143 snap-fitted with each other, the phase-pole operating mechanism 14 maintains balance, and the circuit breaker handle 31 can drive the phase-pole operating mechanism 14 to drive the moving contact 112 to contact with the static contact 111 to conduct the main circuit and to separate and disconnect the main circuit to close and open the circuit breaker, and to store energy for the circuit breaker energy storage component during the closing process.

[0051] Furthermore, the phase pole 1 of the circuit breaker includes an electromagnetic tripping mechanism 12, a double metal tripping mechanism 13 and an arc extinguishing mechanism. The static contact 111 is fixed in the shell and connected with the electromagnetic tripping mechanism 12 and the terminal 15 at the left end through the main circuit conductive parts. The moving contact 112 is installed on the phase pole operating mechanism 14 to swing and cooperate with the static contact 111, and is connected with the double metal tripping mechanism 13 and the circuit breaker terminal 14 at the right end through the main circuit conductive parts. When a short circuit, overload or leakage occurs in the circuit, the tripping buckle 142 and the locking buckle 143 are driven to be separated and unfastened from each other by the electromagnetic tripping mechanism 12, the double metal tripping mechanism 13 and the leakage operating mechanism 22, respectively, so that the phase pole operating mechanism 14 loses balance, and the moving contact 112 is driven to leave the static contact 111 by releasing energy through the energy storage component to disconnect the main circuit and cut off the fault circuit to achieve protection.

[0052] See also Figure 1-9 In the illustrated embodiment 1, the leakage protection pole 2 includes a zero-sequence current transformer 21, a leakage operating mechanism 22, a leakage testing mechanism 25, and a neutral pole static contact 211 and a neutral pole moving contact 212 relatively arranged in the housing, the neutral pole moving contact 212 is connected to the leakage operating mechanism 22 through a protection drive rod 225, the other end of the protection drive rod 225 is hinged to one side of the leakage operating mechanism 22 through a shaft machine coupling drive rod 220, the other side of the leakage operating mechanism 22 is connected to the circuit breaker handle 31, the shaft machine coupling drive rod 220 and the protection drive rod 225 are connected. The swing plane is arranged vertically, and the two ends of the shaft machine coupling drive rod 220 are respectively connected to the protection drive rod 225 and the leakage operating mechanism 22, the first contact piece 27 is arranged on one side of the shaft machine coupling drive rod 220, the first contact portion 261 of the elastic member 26 extends between the shaft machine coupling drive rod 220 and the first contact piece 27 and cooperates with the middle part of the shaft machine coupling drive rod 220, the test button 29 can push the second contact portion 262 to contact with the second contact piece 28, and when the circuit breaker is closed, the shaft machine coupling drive rod 220 pushes the first contact portion 261 to contact with the first contact piece 27.

[0053] When the circuit breaker handle 31 rotates toward the closing position, the leakage operating mechanism 22 drives the protection driving rod 225 through the shaft machine coupling driving rod 220 to drive the neutral pole static contact 211 and the neutral pole moving contact 212 to contact, and pushes the first contact portion 261 to contact the first contact piece 27 through the shaft machine coupling driving rod 220. When the circuit breaker handle 31 rotates toward the opening position, the shaft machine coupling driving rod 220 is driven away from the first contact portion 261. The first contact portion 261 is reset under its own elastic action and pushes the circuit breaker handle 31 to accelerate to the opening position. In this embodiment, on the basis of the double-breakpoint test circuit, the first contact portion 261 is driven by the dynamic shaft machine coupling driving rod 220 of the leakage operating mechanism 22 to contact the first contact piece 27, which can not only ensure that the test circuit is not turned on when the circuit breaker phase 1 is opened by pressing the test button 29, further improving the reliability of the circuit breaker, but also the elastic member 26 cooperates with the dynamic shaft machine coupling driving rod 220, which can further improve the action speed of the leakage operating mechanism 22.

[0054] As a preferred embodiment of the leakage operating mechanism 22, the leakage operating mechanism 22 includes a protection lever 221 pivotally mounted in a shell, and a protection jump buckle 222 and a protection lock buckle 224 pivotally mounted on the protection lever 221 and snap-fitted with each other, the protection jump buckle 222 is hinged to one end of a protection connecting rod 223, the other end of the protection connecting rod 223 is hinged to the circuit breaker handle 31, the protection drive rod 225 is hinged to the protection lever 221 through a shaft-machine coupling drive rod 220, the neutral pole moving contact 212 is hinged to the protection drive rod 225, and the neutral pole moving contact 212 is connected to one end of a reset spring 227, the other end of the reset spring 227 is connected to the shell, and the circuit breaker handle 31 can drive the neutral pole moving contact 212 to swing through the protection drive rod 225 when the protection jump buckle 222 and the protection lock buckle 224 snap-fitted with each other. One end of the protection shaft machine coupling driving rod 220 is connected to one end of the protection driving rod 225, and the protection lever 221 is provided with a shaft machine coupling driving rod through hole matched with the other end of the shaft machine coupling driving rod 220, and the other end of the shaft machine coupling driving rod 220 passes through the shaft machine coupling driving rod through hole and extends to the other side of the protection lever 221 and is connected to the limiting member 226. Of course, the leakage operating mechanism 22 can also adopt other solutions.

[0055] See also Figure 2 The closing process is as follows: the circuit breaker handle 31 rotates clockwise, the circuit breaker handle 31 pushes the connecting rod 223, the connecting rod 223 pushes the trip buckle 222 and the lock buckle 224 to drive the protection lever 221 to rotate clockwise, and the protection lever 221 compresses the elastic member 26 to store energy until the mechanism is closed.

[0056] The tripping process is as follows: when an overload or leakage current occurs in the line, the leakage release 23 pushes the lock buckle 224 and the jump buckle 222 to unlock and release the protection lever 221. The protection lever 221 can rotate faster in the counterclockwise direction under the action of the reset spring and the elastic member 26.

[0057] Furthermore, one end of the reset spring 227 is connected to the neutral pole moving contact 212, and the other end is connected to the second contact piece 28. The second contact piece 28 plays the role of testing the circuit breakpoint and fixing the reset spring 227. At the same time, the reset spring 227 plays the role of cooperating with the neutral pole moving contact 212 and electrically connecting the neutral pole moving contact 212 and the second contact piece 28.

[0058] Furthermore, the second contact piece 28 is arranged on the side of the neutral pole moving contact 212 close to the neutral pole static contact 211, the first contact piece 27 and the elastic piece 26 are arranged on the side of the neutral pole moving contact 212 away from the neutral pole static contact 211, the neutral pole moving contact 212 is connected to the second contact piece 28 through the reset spring 227, the second contact portion 262 passes through one side of the neutral pole moving contact 212 to cooperate with the second contact piece 28, the first contact piece 27 is connected to the test resistor 251 arranged below the first contact piece 27, and by respectively arranging the first contact piece 27 and the second contact piece 28 on both sides of the neutral pole static contact 211, it not only has the characteristics of compact structure, short moving stroke and fast action speed, but also the second contact piece 28, on the basis of the function of conducting the test circuit, plays the role of resetting the neutral pole moving contact 212 by connecting to the reset spring 227, which kills two birds with one stone and is a clever design.

[0059] See also Figure 3-7 A preferred embodiment of the protection drive rod 225 is shown, one end of the protection drive rod 225 is provided with a shaft machine coupling drive boss 2251 arranged along the axial direction of the shaft machine coupling drive rod 220, the shaft machine coupling drive boss 2251 is provided with a shaft machine coupling drive hole 2252 sleeved on the shaft machine coupling drive rod 220, the other end of the protection drive rod 225 is provided with a contact drive boss 2253, the contact drive boss 2253 is provided with a contact drive rod 2254 rotatably connected to the neutral pole moving contact 212, the contact drive rod 2254 is arranged perpendicular to the swing plane of the neutral pole moving contact 212, one end of the protection drive rod 225 is stacked on the protection lever 221, and the neutral pole moving contact 212 is stacked on the other end of the protection drive rod 225. This embodiment has the characteristics of simple structure, easy processing and easy assembly by setting a shaft-machine coupling drive hole 2252 at one end of the protective drive rod 225 and setting a contact drive rod 2254 at the other end of the protective drive rod 225. In addition, the shaft-machine coupling drive boss 2251 can improve the strength of the connection between the shaft-machine coupling drive hole 2252 and the shaft-machine coupling drive rod 220.

[0060] See also Figure 6 A preferred embodiment of the elastic member 26 is shown, wherein the elastic member 26 is a torsion spring, and the elastic member 26 includes a spiral portion 263 connected between a first contact portion 261 and a second contact portion 262, the spiral portion 263 is sleeved on a spring shaft 260 and connected to the shell, the first contact portion 261 and the second contact portion 262 are both arranged perpendicular to the axis of the spiral portion 263, the first contact portion 261 extends between the protection drive rod 225 and the first contact member 27, and the second contact portion 262 extends between the test button 29 and the second contact member 28.

[0061] The first contact portion 261 includes a first contact arm 261a, a second contact arm 261b and a third contact arm 261c which are connected in a U shape. The first contact arm 261a and the third contact arm 261c are arranged opposite to each other. The second contact arm 261b is vertically connected between one end of the first contact arm 261a and the third contact arm 261c. The other end of the first contact arm 261a is connected to the spiral portion 263. The other end of the third contact arm 261c is connected to the fourth contact arm 261d. The fourth contact arm 261d extends between the shaft machine coupling drive rod 220 and the second contact member 28. The first contact portion 261 is inserted into the spring limit groove 261e along the direction of the second contact arm 261b for limit matching.

[0062] Furthermore, the first contact member 27 and the shaft machine coupling driving rod 220 are arranged on both sides of the elastic member 26, and the fourth contact arm 261d of the first contact portion 261 is V-shaped, one end of the fourth contact arm 261d is inclined toward the side close to the shaft machine coupling driving rod 220, and the other end of the fourth contact arm 261d is inclined toward the side close to the first contact member 27. The first contact portion 261 can effectively reduce the distance between the first contact portion 261 and the first contact member 27 and accelerate the speed of conducting the test circuit through the fourth contact arm 261d arranged in a V-shape, and the elasticity is also higher, which has the characteristics of fast reset speed and will not damage the first contact member 27 due to hard contact.

[0063] Furthermore, a bent contact arm 261f bent toward the first contact piece 27 is provided at the end of the fourth contact arm 261d, and the outer side of the bent contact arm 261f contacts and cooperates with the first contact piece 27, which can increase the contact area and ensure reliable contact.

[0064] See also Figure 3-7As shown, a triangular moving contact guide groove 213 is provided in the middle of the neutral pole moving contact 212, a moving contact guide column 214 is provided in the housing and is inserted into the moving contact guide groove 213 and matched with the moving contact guide groove 213, one end of the reset spring 227 is sleeved in the guide groove 213, and the neutral pole moving contact 212 is provided with a protective drive rod shaft hole and a neutral pole moving contact 215 on both sides of the moving contact guide groove 213, respectively, and the neutral pole moving contact 215 is in contact with the neutral pole static contact 216 on the neutral pole static contact 211. The neutral pole moving contact 212 of this embodiment has the characteristics of small size, simple structure and easy processing and manufacturing, which can reduce the production cost and assembly difficulty.

[0065] Furthermore, the neutral pole moving contact 212 is V-shaped, the middle part of the neutral pole moving contact 212 protrudes toward the side close to the second contact piece 28, and an opening 217 is formed on the other side of the neutral pole moving contact 212 to avoid the first contact piece 27. The neutral pole moving contact 215 and the protection drive rod shaft hole are respectively arranged at both ends of the V-shaped neutral pole moving contact 212, and a test resistor 251 connected to the first contact piece 27 is provided on one side of the neutral pole moving contact 212, which can avoid mutual interference between parts, further compact the structure of the test mechanism, and reduce the occupied space.

[0066] See also Figure 2 , 7 A preferred embodiment of the test button 29 is shown, the test button 29 includes a button connecting portion 291 and a button operating portion 292 and a button pushing portion 293 respectively arranged at both ends of the button connecting portion 291, the other end of the button operating portion 292 extends out of the shell, the other end of the button pushing portion 293 cooperates with the first contact portion 261, the button connecting portion 291 is connected to one end of the top side of the button pushing portion 293, the other end of the top side of the button pushing portion 293 cooperates with the shell limit, and a first button pushing portion 297 and a second button pushing portion 298 are provided on the bottom side of the button pushing portion 293 respectively extending to both sides of the first contact portion 261, and a button pushing groove 299 that cooperates with the first contact portion 261 is formed between the first button pushing portion 297 and the second button pushing portion 298.

[0067] like Figure 10-16The second embodiment of the circuit breaker of the present invention is shown. The difference between this embodiment and the above-mentioned first embodiment is that the neutral line drive member is not connected between the leakage operating mechanism 22 and the neutral pole moving contact 212. The neutral line drive member of this embodiment is connected between the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker and the neutral pole moving contact 212. The neutral line drive member is driven by the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker. The neutral line drive member includes a protection drive rod 225 connected to the neutral pole moving contact 212 of the neutral line moving contact, and a shaft machine coupling drive rod 220 connected between the protection drive rod 225 and the leakage operating mechanism 22; the first contact portion 261 of the elastic member 26 cooperates with the protection drive rod 225 of the neutral line drive member.

[0068] Specifically, the leakage protection pole 2 is arranged on one side of the circuit breaker phase pole 1, and the leakage protection pole 2 includes a zero-sequence current transformer 21, a leakage operating mechanism 22, a leakage release 23, a leakage testing mechanism 25, a protection circuit board and a neutral contact mechanism;

[0069] The circuit breaker phase pole 1 comprises a phase pole releaser, a phase pole operating mechanism 14 and a phase pole contact mechanism, and the phase pole releaser comprises an electromagnetic release mechanism 12 and / or a bimetal release mechanism 13;

[0070] The phase pole contact mechanism includes a static contact 111 and a moving contact 112 respectively connected to the phase line, and the neutral line contact mechanism includes a neutral pole moving contact 212 and a neutral pole static contact 211 respectively connected to the neutral line, and the neutral pole moving contact 212 is connected to the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker through a protection drive rod 225;

[0071] The leakage test mechanism 25 includes a test button 29 and a leakage test circuit, the leakage test circuit includes an elastic member 26, a first contact member 27 and a second contact member 28, the elastic member 26 includes a first contact portion 261 and a second contact portion 262 connected to each other, the first contact portion 261 is arranged between the first contact member 27 and the protection driving rod 225, and the second contact portion 262 is arranged between the second contact member 28 and the test button 29;

[0072] When phase pole 1 of the circuit breaker is closed, the phase pole operating mechanism 14 pushes the first contact portion 261 of the elastic member 26 to contact the first contact member 27 through the protection driving rod 225, and when the test button 29 is pressed, the test button 29 pushes the second contact portion 262 of the elastic member 26 to contact the second contact member 28, and a circuit is formed between the first contact member 27 and the second contact member 28 through the elastic member 26, so that the leakage test circuit is turned on.

[0073] The zero-sequence current transformer 21 of the leakage protection pole 2 is sleeved on the neutral line and the leakage test circuit. When the leakage test circuit is turned on, it simulates the leakage current in the neutral line, so that the zero-sequence current transformer 21 senses the leakage current, and the zero-sequence current transformer 21 drives the leakage release 23 to unlock the leakage operating mechanism 22. At the same time, the leakage operating mechanism 22 drives the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker to unlock. When the phase pole operating mechanism 14 is unlocked, it drives the static contact 111 and the moving contact 112 to separate, disconnecting the connected phase line, and at the same time, the neutral pole moving contact 212 and the neutral pole static contact 211 are driven to separate through the protection drive rod 225 to disconnect the connected neutral line.

[0074] The first contact portion 261 of the elastic member 26 and the first contact member 27 form a first test contact of the leakage test circuit, and the second contact portion 262 of the elastic member 26 cooperates with the second contact member 28 to form a second test contact of the leakage test circuit. The closing and opening of the second test contact is controlled by the test button 29;

[0075] After the circuit breaker is connected to the power supply, when the phase pole 1 of the circuit breaker is in the open state, the second test contact is in the disconnected state. At this time, the test button 29 is pressed. After the second test contact is closed, since the first test contact is in the disconnected state, the leakage test circuit cannot be turned on, and the load side of the circuit breaker cannot form a voltage to the ground or a voltage to the protection circuit board.

[0076] When the phase pole 1 of the circuit breaker is in the closed state, the first test contact is in the closed state. At this time, the test button 29 is pressed, the first test contact is closed and the leakage test circuit is turned on to simulate the leakage signal. The phase pole 1 of the circuit breaker trips, which indicates that the leakage protection function of the leakage protection pole 2 has not failed.

[0077] In the circuit breaker of this embodiment, the first contact portion 261 of the elastic member 26 and the first contact member 27 form the first test contact of the leakage test circuit, and the second contact portion 262 of the elastic member 26 cooperates with the second contact member 28 to form the second test contact of the leakage test circuit. The closing and opening of the second test contact are controlled by the test button 29, and the first test contact is controlled by the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker, so that the closing and opening of the first test contact are synchronized with the closing and opening actions of the phase pole 1 of the circuit breaker. This can not only effectively avoid the single-contact leakage test circuit being turned on by pressing the test button 29 when the phase pole 1 of the circuit breaker is opened, resulting in the leakage test circuit generating a voltage to the ground or a voltage to the protection circuit board, but also has the characteristics of compact structure, small size and high reliability.

[0078] When the circuit breaker handle 31 rotates toward the closing position, the phase pole operating mechanism 14 of the circuit breaker phase pole 1 drives the protection driving rod 225 through the shaft machine coupling driving rod 220 to push the first contact portion 261 to contact the first contact piece 27; when the circuit breaker handle 31 rotates toward the opening position, the phase pole operating mechanism 14 of the circuit breaker phase pole 1 drives the protection driving rod 225 away from the first contact portion 261 through the shaft machine coupling driving rod 220.

[0079] In this embodiment, on the basis of the double breakpoint test circuit, the first contact portion 261 is driven by the protection drive rod 225 of the leakage operating mechanism 22 instead of the shaft machine coupling drive rod 220 of the leakage operating mechanism 22. The contact area between the protection drive rod 225 and the first contact portion 261 is larger, which not only makes the fit more reliable but also reduces the difficulty of assembly.

[0080] Referring to the first and second embodiments, the circuit breaker created by the present invention includes a circuit breaker phase pole 1 ( Figure 1 )、Leakage protection electrode 2( Figure 2 )、Leakage test mechanism 25( Figure 3 ), and operating mechanisms respectively cooperating with the phase pole 1 and the leakage protection pole 2 of the circuit breaker, the phase pole 1 and the leakage protection pole 2 of the circuit breaker respectively comprising a phase pole contact mechanism and a neutral line contact mechanism connected to the line;

[0081] When the circuit breaker is closed, the operating mechanism drives the phase contact mechanism and the neutral contact mechanism to conduct the line. When the line fails, the operating mechanism is unlocked and drives the phase contact mechanism and the neutral contact mechanism to disconnect the line.

[0082] The leakage test mechanism 25 includes a test button 29 and a leakage test circuit. The leakage test circuit includes a second test contact that cooperates with the test button 29, and a first test contact that cooperates with the operating mechanism. The test button 29 can drive the second test contact to close and separate. The operating mechanism drives the phase contact mechanism and the neutral contact mechanism to conduct and disconnect the circuit, and can drive the first test contact to close and separate. When the first test contact and the second test contact are both closed, the leakage test circuit is turned on and generates a leakage fault test signal to unlock the operating mechanism. When either the first test contact or the second test contact is separated, the leakage test circuit is disconnected.

[0083] In the circuit breaker created by the present invention, the first test contact and the second test contact of the leakage test circuit are controlled by the operating mechanism and the test button 29 respectively. The leakage test circuit will be turned on only when the first test contact and the second test contact are both closed. When either the first test contact or the second test contact is disconnected, the leakage test circuit will not be turned on, and the load side of the circuit breaker will not be able to form a voltage to the ground or a voltage to the circuit board, so the load and the circuit board can be reliably protected.

[0084] The circuit includes a phase line and a neutral line, the phase pole contact mechanism is connected to the phase line, and the neutral line contact mechanism is connected to the neutral line, the operating mechanism includes a phase pole operating mechanism 14 that cooperates with the phase pole contact mechanism, and a leakage operating mechanism 22 that is arranged on one side of the phase pole operating mechanism 14 and cooperates with the neutral line contact mechanism, and the phase pole operating mechanism 14 and the leakage operating mechanism 22 cooperate with each other;

[0085] When the circuit breaker is closed, the phase pole operating mechanism 14 and the leakage operating mechanism 22 are locked in the energy storage state respectively, and the phase pole contact mechanism is driven by the phase pole operating mechanism 14 to conduct the phase line, and the neutral line contact mechanism is driven by the leakage operating mechanism 22 to conduct the neutral line. The phase pole operating mechanism 14 or the leakage operating mechanism 22 corresponding to the line is unlocked and drives the other to unlock as well, so that the phase pole contact mechanism and the neutral line contact mechanism disconnect the phase line and the neutral line respectively.

[0086] The first test contact of the leakage test circuit cooperating with the operating mechanism can be controlled by the leakage operating mechanism 22 of the operating mechanism, or by the phase pole operating mechanism 14 of the operating mechanism.

[0087] The phase pole contact mechanism is connected to the phase pole operating mechanism 14, and the neutral line contact mechanism is connected to the phase pole operating mechanism 14 or the leakage operating mechanism 22 through the neutral line driving member, and the neutral line driving member drives the first test contact to close and separate.

[0088] The first test contact is controlled by the leakage operating mechanism 22. The first test is the first embodiment of the circuit breaker created by the present invention. The neutral contact mechanism is connected to the leakage operating mechanism 22 through the neutral driving member, and the first test contact cooperates with the neutral driving member. The neutral driving member includes a protection driving rod 225 and a shaft machine coupling driving rod 220. One end of the protection driving rod 225 is connected to the neutral pole moving contact 212, and the other end of the protection driving rod 225 is hinged to the leakage operating mechanism 22 through the shaft machine coupling driving rod 220; the first contact portion 261 of the elastic member 26 cooperates with the shaft machine coupling driving rod 220, and the shaft machine coupling driving rod 220 pushes the first contact portion 261 to contact the first contact member 27, and the neutral pole moving contact 212 is connected to one end of the reset spring 227, and the other end of the reset spring 227 is connected to the housing.

[0089] The first test contact is controlled by the phase pole operating mechanism 14. The first test is the second embodiment of the circuit breaker created by the present invention. The neutral line contact mechanism is connected to the phase pole operating mechanism 14 through the neutral line drive member, and the first test contact cooperates with the neutral line drive member. The neutral line drive member includes a protection drive rod 225 and a shaft machine coupling drive rod 220. One end of the protection drive rod 225 is connected to the neutral pole moving contact 212. The protection drive rod 225 is hinged to the phase pole operating mechanism 14 through the shaft machine coupling drive rod 220; the first contact portion 261 of the elastic member 26 cooperates with the protection drive rod 225, and the protection drive rod 225 pushes the first contact portion 261 to contact the first contact member 27. The neutral pole moving contact 212 is connected to one end of the reset spring 227, and the other end of the reset spring 227 is connected to the housing.

[0090] The two embodiments of the circuit breaker of the present invention both have the following characteristics:

[0091] like Figure 3 As shown, the leakage test mechanism 25 includes a first contact member 27 and a second contact member 28, the elastic member 26 is a torsion spring, and the elastic member 26 includes a spiral portion 263 connected between the first contact portion 261 and the second contact portion 262, the spiral portion 263 is sleeved on the spring shaft 260 and connected to the shell, the first contact portion 261 is arranged between the center line driving member and the first contact member 27, and forms a first test contact with the first contact member 27, the second contact portion 262 is arranged between the second contact member 28 and the test button 29, and forms a second test contact with the second contact member 28.

[0092] In the circuit breaker created by the present invention, the first contact portion 261 and the second contact portion 262 on the elastic member 26 respectively constitute the first test contact and the second test contact of the leakage test circuit, which can not only ensure the reliability of the leakage test circuit, but also improve the action speed of the operating mechanism through the cooperation between the first contact portion 261 and the operating mechanism.

[0093] Fig.17 Shows the leakage test circuit when the circuit breaker is connected in the positive direction. Fig.18The leakage test circuit when the circuit breaker is reversely wired is shown; one end of the leakage test circuit is connected to the phase line connected to the phase pole 1 of the circuit breaker, and the other end of the leakage test circuit is connected to the neutral line connected to the leakage protection pole 2. Specifically, the leakage test circuit also includes a test resistor 251 and a reset spring 227. The first contact 27 is connected to the phase line of the circuit breaker phase pole 1 through the test resistor 251, one end of the reset spring 227 is connected to the neutral line with the neutral line contact mechanism, and the other end of the reset spring 227 is rotatably mounted on the second contact 28. When the first test contact and the second test contact are both closed, the leakage test circuit is turned on between the phase line and the neutral line to generate a leakage fault test signal, which can not only form a leakage test circuit with the neutral line contact mechanism and the first contact 27, but also the reset spring 227 can increase the contact pressure of the neutral line contact mechanism. Of course, the leakage test circuit can also use other schemes to simulate the generation of leakage current, which all belong to the protection scope of the present invention.

[0094] like Figure 1 , 12 As shown, the operating mechanism is connected to the circuit breaker handle 31, and the circuit breaker handle 31 includes a phase pole handle 31a and a leakage protection handle 31b. The phase pole handle 31a is connected to the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker, and the leakage protection handle 31b is connected to the leakage operating mechanism 22 of the leakage protection pole 2. A push block 31c is provided on the leakage protection handle 31b, and the push block 31c extends to the side where the phase pole handle 31a rotates in the closing direction. When the leakage protection handle 31b rotates in the opening direction due to leakage current, the push block 31c is used to push the phase pole handle 31a to the closing direction. Pushing the phase pole handle 31a to rotate in the opening direction can speed up the operation speed of the circuit breaker; when an overload or short-circuit current occurs, the phase pole handle 31a rotates in the opening direction, but the leakage protection handle 31b does not operate. The position of the phase pole handle 31a and the leakage protection handle 31b can indicate the cause of the fault. If both the phase pole handle 31a and the leakage protection handle 31b operate, it means that the cause of the fault is overload or short-circuit current; if the phase pole handle 31a operates and the leakage protection handle 31b does not operate, it means that the cause of the fault is leakage current.

[0095] In the above-mentioned embodiment 1, the neutral line contact mechanism is connected to the leakage operating mechanism 22 of the operating mechanism through the neutral line driving member, and the neutral line driving member includes a protection driving rod 225 connected to the neutral line moving contact, and an axis-machine coupling driving rod 220 connected between the protection driving rod 225 and the leakage operating mechanism 22; the first contact portion 261 of the elastic member 26 cooperates with the protection driving rod 225 or the axis-machine coupling driving rod 220 of the neutral line driving member.

[0096] See also Fig.17As shown, in the leakage test circuit when the circuit breaker is connected in the positive direction, the current flows into the terminal 15 at the right end of the phase pole 1 of the circuit breaker, passes through the moving contact 112 of the phase pole 1 of the circuit breaker, the static contact 111 of the phase pole 1 of the circuit breaker, the zero-sequence current transformer 21 of the leakage protection pole 2, the terminal 15 at the left end of the phase pole 1 of the circuit breaker, the test resistor 251, the first contact piece 27, the second test contact, the first test contact, the elastic piece 26, the reset spring 227, and the neutral pole moving contact 212 to the terminal 15 at the right end of the leakage protection pole 2.

[0097] See also Fig.18 As shown, in the test circuit when the circuit breaker is reversely connected, the current flows into the terminal 15 at the left end of the phase pole 1 of the circuit breaker, passes through the test resistor 251, the first contact piece 27, the elastic piece 26, the first test contact, the second test contact, the reset spring 227, the neutral pole moving contact 212, the neutral pole static contact 211, and the zero-sequence current transformer 21 to the terminal 15 at the left end of the leakage protection pole 2.

[0098] like Figure 10-11 As shown in the figure, the structure of the elastic member 26 of this embodiment. The structure of the elastic member 26 of this embodiment is the same as that of the elastic member 26 in the first embodiment, but the difference is that the first contact portion 261 of the elastic member 26 of the protection drive rod 225 of this embodiment cooperates with the protection drive rod 225. That is, the first contact member 27 and the protection drive rod 225 are arranged on both sides of the elastic member 26 opposite to each other, and the fourth contact arm 261d of the first contact portion 261 is V-shaped, and one end of the fourth contact arm 261d is inclined toward the side close to the protection drive rod 225.

[0099] Specifically, the elastic member 26 is a torsion spring, and the elastic member 26 includes a spiral portion 263 connected between the first contact portion 261 and the second contact portion 262. The spiral portion 263 is sleeved on the spring shaft 260 and connected to the shell. The first contact portion 261 and the second contact portion 262 are both arranged perpendicular to the axis of the spiral portion 263. The first contact portion 261 extends between the protection drive rod 225 and the first contact member 27, and the second contact portion 262 extends between the test button 29 and the second contact member 28.

[0100] Furthermore, the spiral portion 263 is arranged on a side close to the test button 29, and the first contact portion 261 is a U-shaped structure. The first contact portion 261 includes a first contact arm 261a and a third contact arm 261c that are relatively arranged, and a second contact arm 261b vertically connected between one end of the first contact arm 261a and the third contact arm 261c. The second contact arm 261b is arranged parallel to the axis of the spiral portion 263, and the second contact arm 261b extends away from one end of the first contact arm 261a toward the swing plane of the protection drive rod 225. The other end of the first contact arm 261a is connected to the spiral portion 263, and the third contact arm 261c extends between the protection drive rod 225 and the second contact piece 28, and the third contact arm 261c and the protection drive rod 225 are arranged in the same plane.

[0101] Furthermore, the other end of the third contact arm 261c away from the second contact arm 261b is connected to the fourth contact arm 261d with a V-shaped structure, and the fourth contact arm 261d extends between the protection drive rod 225 and the second contact piece 28. The side of the fourth contact arm 261d connected to the second contact arm 261b is inclined toward the direction close to the protection drive rod 225, and the side of the other side of the fourth contact arm 261d is inclined toward the direction close to the first contact piece 27 to cooperate with the first contact piece 27. A bent portion that cooperates with the protection drive rod 225 is formed at the connection between the two side edges of the fourth contact arm 261d. The protection drive rod 225 pushes the bent portion of the fourth contact arm 261d to make the end of the fourth contact arm 261d away from the second contact arm 261b contact with the first contact piece 27, thereby realizing the closure of the second test contact. The V-shaped fourth contact arm 261d can not only optimize the layout of parts and ensure a reliable and safe electrical distance between the first contact member 27 and other parts, but also reduce the distance between the first contact portion 261 and the protection drive rod 225, thereby facilitating the protection drive rod 225 to drive the first contact portion 261 to move and ensure the sensitivity of the elastic member 26.

[0102] Furthermore, a bent contact arm 261f is provided at one end of the fourth contact arm 261d that cooperates with the first contact member 27. The bent contact arm 261f is bent toward a side away from the first contact member 27, and an arc surface that cooperates with the first contact member 27 is formed on the outer side of the bent contact arm 261f. The fourth contact arm 261d contacts the first contact member 27 through the arc surface formed on the bent contact arm 261f, and the contact area is larger, and the contact is more reliable.

[0103] like Fig.15As shown, a partition 32 is provided between the phase pole 1 and the leakage protection pole 2 of the circuit breaker, and a spring shaft 260 for mounting the spiral portion 263 of the elastic member 26 is provided on the partition 32. A button guide plate 294 is provided on one side of the spring shaft 260 of the partition 32 to match with one side of the test button 29, and a spring stop groove 261e is provided on the other side of the button guide plate 294 to match with the first contact portion 261 of the elastic member 26. The spiral portion 263 can be rotatably sleeved on the spring shaft 260, and the first contact arm 261a, the second contact arm 261b and the third contact arm 261c of the first contact portion 261 are inserted into the spring stop groove 261e for stop matching. Preferably, the third contact arm 261c is connected to the fourth contact portion 261d after extending to the outside of the spring stop groove 261e, which has the characteristic of simple assembly.

[0104] See also Fig.15 As shown, a triangular moving contact guide groove 213 is provided in the middle of the neutral pole moving contact 212, a moving contact guide column 214 is provided in the housing and is inserted into the moving contact guide groove 213 and matched with the moving contact guide groove 213, a rotatable moving contact stopper 219 is provided on the contact guide column 214, and the neutral pole moving contact 212 is provided with a protective drive rod shaft hole and a neutral pole moving contact 215 on both sides of the moving contact guide groove 213, and one end of the protective drive rod shaft hole and the moving contact stopper 219 is provided. They are respectively rotatably sleeved on one end of the contact driving rod 2254, the other end of the contact driving rod 2254 is rotatably connected to the protection driving rod 225, the other end of the moving contact limiter 219 is limitedly matched with the side of the neutral pole moving contact 212 away from the neutral pole static contact 211, one end of the reset spring 227 is sleeved on the side wall of one side of the guide groove 213 and is rotatably connected to the neutral pole moving contact 212, and the neutral pole moving contact 215 is in contact with the neutral pole static contact 216 on the neutral pole static contact 211.

[0105] When the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker is actuated, the protection driving rod 225 drives the neutral pole moving contact 212 and the moving contact stopper 219 sleeved on the other end of the contact driving rod 2254 to actuate through the contact driving rod 2254, so that the triangular moving contact guide groove 213 of the neutral pole moving contact 212 is sleeved on the contact guide column 214 and swings, and at the same time, the moving contact stopper 219 rotates with the contact guide column 214 as the center of the circle and limits the swing of the neutral pole moving contact 212. The neutral pole moving contact 212 of this embodiment has the characteristics of small size, simple structure and easy processing and manufacturing, which can reduce the production cost and assembly difficulty.

[0106] See also Figure 12-14As shown, the structure of the protection drive rod 225 of this embodiment is the same as the structure of the protection drive rod 225 in the first embodiment. One end of the protection drive rod 225 is hinged to the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker through the shaft machine coupling drive rod 220, and the other end of the protection drive rod 225 is hinged to the neutral pole moving contact 212 through the contact drive rod 2254. When the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker is actuated, the neutral pole moving contact 212 is driven to actuate through the protection drive rod 225.

[0107] like Fig.14 As shown, the partition 32 is provided with a stop block 2250 for limiting the protection driving rod 225 , and the stop block 2250 cooperates with one end of the protection driving rod 225 close to the neutral pole moving contact 212 , and the stop block 2250 prevents the protection driving rod 225 from reaching a dead point.

[0108] like Figure 4 The structure of the leakage operating mechanism 22 in this embodiment is shown. The leakage operating mechanism 22 includes a protection lever 221 pivotally installed in the shell, and a protection jumper 222 and a protection lock 224 pivotally installed on the protection lever 221 and snap-fitted with each other. The protection jumper 222 is connected to the leakage protection handle 31b through a protection connecting rod 223, and the protection lock 224 is connected to the protection lever 221 through a protection spring 228. The protection spring 228 can drive the protection lock 224 to snap-fit ​​with the protection jumper 222 to maintain energy storage. The leakage release 23 of the leakage protection pole 2 can unlock the protection lock 224 and the protection jumper 222 when a leakage fault occurs. The phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker is provided with an unlocking lever 229 extending to one side of the protection lever 221. When the protection lock 224 and the protection jumper 222 are unlocked, the phase pole operating mechanism 14 is unlocked by the unlocking lever 229.

[0109] like Fig.16The structure of the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker in this embodiment is shown. The phase pole operating mechanism 14 includes a circuit breaker energy storage component, a rocker arm 141 pivotally mounted in the housing and connected to the moving contact 112, a phase pole support 140 pivotally mounted on the rocker arm 141, and a trip buckle 142 and a lock buckle 143 pivotally mounted on the phase pole support 140 and snap-fitted with each other. The trip buckle 142 is connected to the phase pole handle 31a through a connecting rod 144, and the phase pole support 140 is connected to the housing through the circuit breaker energy storage component. When the trip buckle 142 and the lock buckle 143 snap-fit ​​with each other, the phase pole operating mechanism 14 maintains balance , the phase pole handle 31a rotates in the closing direction to drive the moving contact 112 to contact with the static contact 111 through the phase pole operating mechanism 14, and stores energy for the circuit breaker energy storage component; when the trip button 142 and the lock button 143 release the buckle cooperation, the energy storage component releases energy and drives the moving contact 112 to separate from the static contact 111; an unlocking lever 229 is provided on the lock button 143 to cooperate with the leakage operating mechanism of the leakage protection pole 2; in this embodiment, the phase pole support 140 is connected with the protection driving rod 225 of the leakage protection pole 2 through the shaft machine coupling driving rod 220, and the lock button 143 is pivotally installed on the phase pole support 140 through the shaft machine coupling driving rod 220.

[0110] The above content is a further detailed description of the invention in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the invention is limited to these descriptions. For ordinary technicians in the technical field to which the invention belongs, several simple deductions or substitutions can be made without departing from the concept of the invention, which should be regarded as falling within the scope of protection of the invention.

Claims

1. A circuit breaker, comprising a housing and a circuit breaker phase pole (1) and a leakage protection pole (2) arranged side by side on both sides of the housing, characterized in that: The leakage protection pole (2) comprises a zero-sequence current transformer (21), a leakage operating mechanism (22), a leakage testing mechanism (25), and a neutral pole static contact (211) and a neutral pole moving contact (212) arranged relatively in a housing; the circuit breaker phase pole (1) comprises a phase pole operating mechanism (14), and a static contact (111) and a moving contact (112) arranged relatively, the moving contact (112) being connected to the phase pole operating mechanism (14); and the main circuit of the circuit breaker phase pole (1) passes through the zero-sequence current transformer (21); The leakage test mechanism (25) comprises an elastic member (26), a test button (29), and a first contact member (27) and a second contact member (28) respectively connected to two ends of a test circuit; the neutral pole moving contact (212) is connected to a leakage operation mechanism (22) or a phase pole operation mechanism (14) via a neutral line drive member; one end of the elastic member (26) is provided with a first contact portion (261) matched with the neutral line drive member; the other end of the elastic member (26) is provided with a second contact portion (262) extending between the second contact member (28) and the test button (29); the test button (29) can push the second contact portion (262) to contact the second contact member (28); and when the circuit breaker is closed, the neutral line drive member pushes the first contact portion (261) to contact the first contact member (27).

2. The circuit breaker according to claim 1, characterized in that: The neutral line drive member comprises a protection drive rod (225) and a shaft machine coupling drive rod (220); one end of the protection drive rod (225) is connected to the neutral pole moving contact (212); the other end of the protection drive rod (225) is hinged to the leakage operating mechanism (22) through the shaft machine coupling drive rod (220); the first contact portion (261) of the elastic member (26) cooperates with the shaft machine coupling drive rod (220); the shaft machine coupling drive rod (220) pushes the first contact portion (261) to contact the first contact member (27); the neutral pole moving contact (212) is connected to one end of a reset spring (227); the other end of the reset spring (227) is connected to the housing.

3. The circuit breaker according to claim 1, characterized in that: The neutral line drive member comprises a protection drive rod (225) and a shaft machine coupling drive rod (220); one end of the protection drive rod (225) is connected to the neutral pole moving contact (212); the other end of the protection drive rod (225) is hinged to the phase pole operating mechanism (14) through the shaft machine coupling drive rod (220); the first contact portion (261) of the elastic member (26) cooperates with the protection drive rod (225); the protection drive rod (225) pushes the first contact portion (261) to contact the first contact member (27); the neutral pole moving contact (212) is connected to one end of a reset spring (227); and the other end of the reset spring (227) is connected to the housing.

4. The circuit breaker according to claim 2 or 3, characterized in that: The leakage operating mechanism (22) comprises a protection lever (221) pivotally mounted in a housing, and a protection trip buckle (222) and a protection lock buckle (224) pivotally mounted on the protection lever (221) and snap-fitted with each other, the protection trip buckle (222) being hinged to one end of a protection connecting rod (223), and the other end of the protection connecting rod (223) being hinged to a circuit breaker handle (31).

5. The circuit breaker according to claim 2 or 3, characterized in that: One end of the return spring (227) is connected to the neutral pole moving contact (212), and the other end is connected to the second contact piece (28).

6. The circuit breaker according to claim 2 or 3, characterized in that: The elastic member (26) is a torsion spring, and the elastic member (26) includes a spiral portion (263) connected between a first contact portion (261) and a second contact portion (262); the spiral portion (263) is sleeved on a spring shaft (260) and connected to the housing; the first contact portion (261) and the second contact portion (262) are both arranged perpendicular to the axis of the spiral portion (263); the second contact member (28) is arranged at a position of the neutral pole moving contact (212) close to the neutral pole static contact (211) The first contact piece (27) and the elastic piece (26) are arranged on a side of the neutral pole moving contact (212) away from the neutral pole static contact (211); the neutral pole moving contact (212) is connected to the second contact piece (28) via a reset spring (227); the second contact portion (262) passes through one side of the neutral pole moving contact (212) to cooperate with the second contact piece (28); and the first contact piece (27) is connected to a test resistor (251) arranged below the first contact piece (27).

7. The circuit breaker according to claim 6, characterized in that: The first contact member (27) and the shaft machine coupling drive rod (220) are arranged on both sides of the elastic member (26) opposite to each other, and a fourth contact arm (261d) in a V shape is provided on the first contact portion (261), one end of the fourth contact arm (261d) is inclined toward a side close to the shaft machine coupling drive rod (220), and the other end of the fourth contact arm (261d) is inclined toward a side close to the first contact member (27).

8. The circuit breaker according to claim 2, characterized in that: One end of the shaft machine coupling drive rod (220) is connected to one end of the protection drive rod (225); the protection lever (221) is provided with a shaft machine coupling drive rod through hole that matches the other end of the shaft machine coupling drive rod (220); a contact drive rod (2254) rotatably connected to the neutral pole moving contact (212) is provided at the other end of the protection drive rod (225); one end of the protection drive rod (225) is stacked on the protection lever (221), and the neutral pole moving contact (212) is stacked on the other end of the protection drive rod (225).

9. The circuit breaker according to claim 7, characterized in that: A bent contact arm (261f) bent toward the first contact piece (27) is provided at the end of the fourth contact arm (261d), and the outer side of the bent contact arm (261f) is in contact and cooperation with the first contact piece (27).

10. The circuit breaker according to claim 6, characterized in that: A triangular moving contact guide groove (213) is provided in the middle of the neutral pole moving contact (212), a moving contact guide column (214) inserted into the moving contact guide groove (213) is provided in the housing, one end of a reset spring (227) is sleeved in the guide groove (213), and the neutral pole moving contact (212) is provided with a protective drive rod shaft hole and a neutral pole moving contact (215) on both sides corresponding to the moving contact guide groove (213).

11. The circuit breaker according to claim 10, characterized in that: The neutral pole moving contact (212) is V-shaped, the middle part of the neutral pole moving contact (212) protrudes toward the side close to the second contact piece (28), and an opening (217) is formed on the other side of the neutral pole moving contact (212) to avoid the first contact piece (27), and the neutral pole moving contact point (215) and the protection drive rod shaft hole are respectively arranged at both ends of the V-shaped neutral pole moving contact (212).

12. The circuit breaker according to claim 1, characterized in that: The test button (29) comprises a button connecting portion (291) and a button operating portion (292) and a button pushing portion (293) respectively arranged at two ends of the button connecting portion (291); the other end of the button operating portion (292) extends out of the shell, and the other end of the button pushing portion (293) cooperates with the first contact portion (261); the button connecting portion (291) is connected to one end of the top side of the button pushing portion (293), and the other end of the top side of the button pushing portion (293) cooperates with the shell to limit the position; a first button pushing portion (297) and a second button pushing portion (298) are respectively arranged on the bottom side of the button pushing portion (293) and extend to two sides of the first contact portion (261); a button pushing groove (299) which cooperates with the first contact portion (261) to limit the position is formed between the first button pushing portion (297) and the second button pushing portion (298).

13. The circuit breaker according to claim 1, characterized in that: The leakage operating mechanism (22) comprises a protection lever (221) pivotally mounted in a housing, and a protection jump buckle (222) and a protection lock buckle (224) pivotally mounted on the protection lever (221) and snap-fitted with each other, the protection jump buckle (222) being connected to the leakage protection handle (31b) via a protection connecting rod (223), and the protection lock buckle (224) being connected to the protection lever (221) via a protection spring (228), and the protection spring (228) being able to drive the protection lock buckle The buckle (224) and the protection trip buckle (222) are buckled to maintain energy storage; the leakage release (23) of the leakage protection pole (2) can unlock the protection lock buckle (224) and the protection trip buckle (222) when a leakage fault occurs; the phase pole operating mechanism (14) of the phase pole (1) of the circuit breaker is provided with an unlocking lever (229) extending to one side of the protection lever (221); when the protection lock buckle (224) and the protection trip buckle (222) are unlocked, the phase pole operating mechanism (14) is unlocked by the unlocking lever (229).

14. The circuit breaker according to claim 3, characterized in that: The phase pole operating mechanism (14) comprises a circuit breaker energy storage component, a rocker arm (141) pivotally mounted in a housing and connected to a moving contact (112), a phase pole support (140) pivotally mounted on the rocker arm (141), and a trip buckle (142) and a lock buckle (143) pivotally mounted on the phase pole support (140) and snap-fitted with each other, wherein the trip buckle (142) is connected to the phase pole handle (31a) via a connecting rod (144), and the phase pole support (140) is connected to the housing via the circuit breaker energy storage component. The phase pole operating mechanism (14) is connected to the phase pole handle (31a) via a connecting rod (144). When the phase pole operating mechanism (14) and the lock catch (143) are engaged with each other, the phase pole operating mechanism (14) maintains balance, and the phase pole handle (31a) rotates in the closing direction to drive the moving contact (112) to contact the static contact (111) through the phase pole operating mechanism (14), and stores energy for the circuit breaker energy storage component; when the tripping catch (142) and the lock catch (143) are released from the engagement, the energy storage component releases energy and drives the moving contact (112) to separate from the static contact (111); an unlocking lever (229) that cooperates with the leakage operating mechanism of the leakage protection pole (2) is provided on the lock catch (143).

15. The circuit breaker according to claim 6, characterized in that: The spiral portion (263) is arranged on a side close to the test button (29); the first contact portion (261) is in a U-shaped structure; the first contact portion (261) comprises a first contact arm (261a) and a third contact arm (261c) which are arranged opposite to each other, and a second contact arm (261b) which is vertically connected between one end of the first contact arm (261a) and one end of the third contact arm (261c); the second contact arm (261b) is arranged parallel to the axis of the spiral portion (263); one end of the second contact arm (261b) is away from the first contact arm (261a) and extends toward the swing plane of the protection drive rod (225); the other end of the first contact arm (261a) is connected to the spiral portion (263); the third contact arm (261c) extends between the protection drive rod (225) and the second contact member (28); and the third contact arm (261c) and the protection drive rod (225) are arranged in the same plane.

16. The circuit breaker according to claim 15, characterized in that: The other end of the third contact arm (261c) away from the second contact arm (261b) is connected to the fourth contact arm (261d) in a V-shaped structure. The fourth contact arm (261d) extends between the protection drive rod (225) and the second contact piece (28). The side edge of the fourth contact arm (261d) connected to the second contact arm (261b) is inclined in a direction close to the protection drive rod (225). The side edge of the other side of the fourth contact arm (261d) is inclined in a direction close to the first contact piece (27) to cooperate with the first contact piece (27). A bending portion that cooperates with the protection drive rod (225) is formed at the connection of the two side edges of the fourth contact arm (261d). The protection drive rod (225) pushes the bending portion of the fourth contact arm (261d) to make the end of the fourth contact arm (261d) away from the second contact arm (261b) contact the first contact piece (27).

17. The circuit breaker according to claim 16, characterized in that: A bent contact arm (261f) is provided at one end of the fourth contact arm (261d) that cooperates with the first contact piece (27); the bent contact arm (261f) is bent toward a side away from the first contact piece (27), and an arc surface that cooperates with the first contact piece (27) is formed on the outer side of the bent contact arm (261f).

18. The circuit breaker according to claim 4, characterized in that: The circuit breaker handle (31) comprises a phase pole handle (31a) and a leakage protection handle (31b); the phase pole handle (31a) is connected to the phase pole operating mechanism (14) of the circuit breaker phase pole (1); the leakage protection handle (31b) is connected to the leakage operating mechanism (22) of the leakage protection pole (2); a pushing block (31c) is provided on the leakage protection handle (31b); the pushing block (31c) extends to the side of the phase pole handle (31a) rotating in the closing direction; when the leakage protection handle (31b) rotates in the opening direction in the presence of leakage current, the pushing block (31c) pushes the phase pole handle (31a) to rotate in the opening direction; when an overload or short circuit current occurs, the phase pole handle (31a) rotates in the opening direction, but the leakage protection handle (31b) does not operate.

19. The circuit breaker according to claim 6, characterized in that: A partition (32) is provided between the phase pole (1) and the leakage protection pole (2) of the circuit breaker, a spring shaft (260) for mounting the spiral portion (263) of the elastic member (26) is provided on the partition (32), a stop block (2250) for limiting the position of the protection driving rod (225) is provided on the partition (32), and the stop block (2250) cooperates with one end of the protection driving rod (225) close to the neutral pole moving contact (212).

20. The circuit breaker according to claim 14, characterized in that: The phase pole support (140) is connected to the protection drive rod (225) of the leakage protection pole (2) through the shaft machine coupling drive rod (220), and the lock buckle (143) is pivotally mounted on the phase pole support (140) through the shaft machine coupling drive rod (220).

Images