CN210866092U - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
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- CN210866092U CN210866092U CN201921472441.6U CN201921472441U CN210866092U CN 210866092 U CN210866092 U CN 210866092U CN 201921472441 U CN201921472441 U CN 201921472441U CN 210866092 U CN210866092 U CN 210866092U
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Abstract
A circuit breaker comprises a handle, an L-pole contact mechanism and an N-pole contact mechanism, wherein the L-pole contact mechanism and the N-pole contact mechanism are coaxially and pivotally arranged in a shell, the L-pole contact mechanism and the N-pole contact mechanism are driven by the handle to be switched on with the corresponding static contacts through the first U-shaped rod and the second U-shaped rod respectively, the L-pole contact mechanism and the N-pole contact mechanism are driven to be switched off through the first driving spring and the second driving spring respectively, the L-pole contact mechanism comprises an L-pole trip locking mechanism, the N-pole contact mechanism comprises an N-pole trip locking mechanism, the L pole contact mechanism is further provided with a pushing portion, when the circuit breaker trips, the L pole tripping locking mechanism is unlocked, the L pole contact mechanism is switched off, the pushing portion of the L pole contact mechanism moves in the switching-off direction for a preset distance and then triggers the N pole tripping locking mechanism to unlock, and the N pole contact mechanism is later than the L pole contact mechanism. The utility model discloses the circuit breaker is through predetermineeing the separating brake of distance control N utmost point contact mechanism and L utmost point contact mechanism.
Description
Technical Field
The utility model relates to a circuit protector, concretely relates to circuit breaker.
Background
The circuit breaker has overload, short circuit protection function simultaneously, and the circuit breaker can automatic disconnection when circuit current surpasss the predetermined value, and mainly used guarantees the power consumption safety, ensures personal safety, prevents to take place the electric shock accident.
From the perspective of safety and space saving, the demand for compact 1P + N circuit breaker products with breakpoints on the N pole is increasing. However, since the space in the case of the circuit breaker is limited and the arc extinguishing capability of the N-pole is limited, in order to protect the N-pole contact, the N-pole contact can be closed and then separated relative to the L-pole contact by reducing the opening distance of the N-pole contact, so that the L-pole contact and the N-pole contact are staggered to act, even if the time difference between the opening of the N-pole contact and the opening of the L-pole contact is limited, and the arc extinguishing during short circuit is still not facilitated after the opening distance of the N-pole contact is reduced.
Disclosure of Invention
An object of the utility model is to overcome prior art's defect, provide a compact structure, circuit breaker that the reliability is high.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a circuit breaker comprises a handle, an L-pole contact mechanism and an N-pole contact mechanism which are rotatably arranged on a shell, wherein the L-pole contact mechanism and the N-pole contact mechanism are coaxially and pivotally arranged in the shell, the L-pole contact mechanism and the N-pole contact mechanism are respectively driven by the handle through a first U-shaped rod and a second U-shaped rod to be switched on with corresponding static contacts, the L-pole contact mechanism and the N-pole contact mechanism are respectively driven by a first driving spring and a second driving spring to be switched off, the L-pole contact mechanism comprises an L-pole trip locking mechanism, the N-pole contact mechanism comprises an N-pole trip locking mechanism, the L-pole contact mechanism is also provided with a pushing part, when the circuit breaker trips, the L-pole trip locking mechanism is unlocked, the L-pole contact mechanism is switched off, the pushing part of the L-pole contact mechanism moves a preset distance in the switching-off direction to trigger the N-pole trip locking mechanism, the N pole contact mechanism is later than the L pole contact mechanism.
Furthermore, the L pole contact mechanism comprises a lever and an L pole moving contact, the lever is connected with the L pole moving contact, and the pushing part is arranged on one side of the lever close to the N pole contact mechanism.
Furthermore, the L-pole tripping locking mechanism further comprises a tripping buckle and a lock catch, the tripping buckle and the lock catch are arranged on the lever in a pivoting mode, after the lever is switched on, the tripping buckle and the lock catch are locked with the lever into a whole after being buckled, during tripping, the tripping buckle is unlocked from the lock catch, and the L-pole moving contact is separated from the fixed contact.
Furthermore, one end of the second U-shaped rod is connected with the handle, the other end of the second U-shaped rod is connected with the N-pole contact mechanism, one end of the second U-shaped rod, which is connected with the N-pole contact mechanism, serves as a sliding end, the N-pole tripping locking mechanism comprises a limiting part arranged on the N-pole contact mechanism and a sliding end arranged on the second U-shaped rod, and when the switch is switched on, the handle pushes the second U-shaped rod, the sliding end of the second U-shaped rod abuts against the limiting part on the N-pole contact mechanism, and the N-pole contact mechanism is pushed to be switched on by pushing the limiting part; after closing, the sliding end keeps spacing fit with the spacing part, and the N-pole tripping locking mechanism is locked; when tripping, the pushing part on the L-pole contact mechanism pushes the sliding end of the second U-shaped rod to be released from the limit fit with the limit part, and the N-pole tripping locking mechanism is unlocked.
Furthermore, the pushing part is a protrusion formed by extending the L-pole contact mechanism towards the N-pole contact mechanism, the protrusion is in a wedge shape with a thin upper part and a thick lower part, and the surface of the pushing part contacting with the sliding end is an inclined surface.
Further, the N pole contact mechanism comprises an N pole moving contact, the limiting portion is arranged on the N pole moving contact, a sliding groove is further formed in the upper end of the N pole moving contact, the sliding groove is formed by connecting a first section groove and a second section groove which are different in height to form a step-shaped sliding groove, the first section groove is higher than the second section groove, the first section groove is located on one side, away from the fixed contact, of the N pole moving contact, the second section groove is located on one side, close to the fixed contact, of the N pole moving contact, and the limiting portion is formed by the connecting portion of the first section groove and the second section groove.
Furthermore, the sliding groove is an open sliding groove with an opening on one side, the opening is arranged on one side close to the static contact, and the inner diameter of the sliding groove is larger than the outer diameter of the sliding end so that the sliding end can slide in the sliding groove relative to the sliding groove.
Furthermore, one end of the first U-shaped rod is connected with the handle, the other end of the first U-shaped rod is connected with the jump buckle, the L-pole moving contact is connected with the lever and coaxially mounted on the shell, one end of the first driving spring is connected with the shell, and the other end of the first driving spring is connected with the L-pole moving contact.
Furthermore, one end of the second driving spring is connected with the shell, and the other end of the second driving spring is connected with the N-pole moving contact.
The circuit breaker of the utility model, the L pole contact mechanism and the N pole contact mechanism are directly driven by the first U-shaped rod and the second U-shaped rod respectively, and the switching-on time of the L pole contact mechanism and the switching-on time of the N pole contact mechanism are not affected; an L-pole trip locking mechanism and an N-pole trip locking mechanism are respectively arranged on the L-pole contact mechanism and the N-pole contact mechanism, a pushing part of the L-pole trip locking mechanism moves a preset distance in the opening direction to trigger the N-pole trip locking mechanism to unlock, so that the opening of the N-pole contact mechanism is later than that of the L-pole contact mechanism, and the opening time difference between the N-pole contact mechanism and the L-pole contact mechanism can be controlled by adjusting the preset distance.
In addition, in order to prevent the position of the handle from influencing the switching-off speed of the N-pole contact mechanism, a step-shaped chute is arranged on the N-pole movable contact, and the connecting surface of the step is used as a limiting part to be in limiting fit with the N-pole movable contact so that the N-pole movable contact is smoothly switched on; when the brake is switched off, the sliding end slides to avoid the limiting part under the rotation action of the N-pole moving contact by utilizing the height difference of the step structure, so that the integral smooth operation of the operating mechanism is ensured, and the compactness of the operating mechanism is also ensured; the pushing part for pushing the second U-shaped rod is arranged on the lever, and the sliding groove and the limiting part which are matched with the second U-shaped rod are arranged on the N-pole moving contact, so that the overall structure is compact, the space in the shell is saved, and the N-pole moving contact is suitable for production of compact products.
Drawings
Fig. 1 is a schematic structural diagram of the breaker of the present invention during opening;
fig. 2 is a schematic structural diagram of the circuit breaker of the present invention during closing;
fig. 3 is a schematic structural diagram of an N-pole moving contact of the circuit breaker of the present invention;
fig. 4 is a schematic structural diagram of the circuit breaker of the present invention when the N-pole moving contact starts to close;
fig. 5 is a schematic structural diagram of the circuit breaker of the present invention when the closing of the N-pole moving contact is completed;
fig. 6 is a schematic structural diagram of the circuit breaker of the present invention when the N-pole moving contact is opened;
fig. 7 is a schematic structural diagram of the circuit breaker of the present invention after the N-pole moving contact is opened;
fig. 8 is a schematic structural view of the pushing portion of the circuit breaker of the present invention;
fig. 9 is an exploded schematic view of the L-pole contact mechanism and the N-pole contact mechanism of the circuit breaker of the present invention.
Detailed Description
The following describes the circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 8. The circuit breaker of the present invention is not limited to the description of the following embodiments.
A circuit breaker comprises a handle 1 rotatably mounted on a shell, an L-pole contact mechanism and an N-pole contact mechanism, wherein the L-pole contact mechanism and the N-pole contact mechanism are coaxially and pivotally mounted in the shell, the L-pole contact mechanism and the N-pole contact mechanism are driven by the handle 1 through a first U-shaped rod 4 and a second U-shaped rod 5 respectively to be switched on with a corresponding static contact 6, the L-pole contact mechanism and the N-pole contact mechanism are driven to be switched off through a first driving spring 2 and a second driving spring 3 respectively, the L-pole contact mechanism comprises an L-pole trip locking mechanism, the N-pole contact mechanism comprises an N-pole trip locking mechanism, the L-pole contact mechanism is further provided with a pushing part 71, when the circuit breaker trips, the L-pole trip locking mechanism is unlocked, the L-pole contact mechanism is switched off, the pushing part 71 of the L-pole contact mechanism moves a preset distance in the switching-off direction and then triggers the, and the N-pole contact mechanism is switched off, so that the N-pole contact mechanism is later than the L-pole contact mechanism.
In the circuit breaker of the utility model, the L-pole contact mechanism and the N-pole contact mechanism are directly driven by the first U-shaped rod 4 and the second U-shaped rod 5 respectively, and the switching-on time of the L-pole contact mechanism and the switching-on time of the N-pole contact mechanism are not influenced; an L-pole trip locking mechanism and an N-pole trip locking mechanism are respectively arranged on the L-pole contact mechanism and the N-pole contact mechanism, a pushing portion 71 of the L-pole trip locking mechanism moves in a tripping direction for a preset distance to trigger the N-pole trip locking mechanism to unlock, the tripping of the N-pole contact mechanism is made to be later than the tripping of the L-pole contact mechanism, and the tripping time difference between the N-pole contact mechanism and the L-pole contact mechanism can be controlled by adjusting the preset distance.
As shown in fig. 1-3, the circuit breaker comprises a handle 1 rotatably mounted on a housing, an L-pole contact mechanism and an N-pole contact mechanism, the L-pole contact mechanism and the N-pole contact mechanism are coaxially and pivotally mounted in the housing, the L-pole contact mechanism and the N-pole contact mechanism are driven by the handle 1 to be switched on with the corresponding static contact 6 through the first U-shaped rod 4 and the second U-shaped rod 5 respectively, the handle 1 is switched on by operating the L-pole contact mechanism through the first U-shaped rod 4, the handle 1 is switched on by operating the N-pole operating mechanism through the second U-shaped rod 5, therefore, the closing time of the L-pole contact mechanism and the N-pole contact mechanism are not influenced mutually, the N-pole contact mechanism can be designed to be closed simultaneously or not simultaneously with the L-pole contact mechanism, of course, the first U-shaped bar 4 and the second U-shaped bar 5 may be operated by one handle 1, or may be independently operated by two linked handles 1. The L pole contact mechanism and the N pole contact mechanism are driven to be separated through the first driving spring 2 and the second driving spring 3 respectively, the L pole contact mechanism comprises an L pole tripping locking mechanism, the N pole contact mechanism comprises an N pole tripping locking mechanism, the L pole contact mechanism comprises a lever 7c and an L pole moving contact 7 connected with the lever 7c, the pushing portion 71 is arranged on one side close to the N pole contact mechanism, preferably on the lever 7c, and certainly can also be arranged on the L pole moving contact 7, when the circuit breaker trips, the L pole tripping locking mechanism is unlocked, the L pole contact mechanism is separated, the pushing portion 71 of the L pole contact mechanism moves a preset distance in the separating direction and then triggers the N pole tripping locking mechanism to be unlocked, the N pole contact mechanism is separated, and the N pole contact mechanism is later than the L pole contact mechanism.
Specifically, the L-pole trip locking mechanism further comprises a trip buckle 7a and a lock catch 7b, the trip buckle 7a and the lock catch 7b are pivotally arranged on a lever 7c, preferably, the lock catch 7b is hinged on the lever 7c through a shaft hole, and the L-pole moving contact 7 is connected with the lever 7c and coaxially mounted on the housing. After closing, the tripping buckle 7a and the lock catch 7b are buckled and then locked with the lever 7c into a whole, and during tripping, the tripping buckle 7a and the lock catch 7b are unlocked, and the L-pole moving contact 7 is separated from the static contact 6. The L-pole contact mechanism is connected with the handle connection 1 through the first U-shaped rod 4, specifically, one end of the first U-shaped rod 4 is connected with the handle 1, the other end of the first U-shaped rod is connected with the jump buckle 7a, one end of the first driving spring 2 is connected with the shell, and the other end of the first driving spring is connected with the L-pole moving contact 7.
The N utmost point tripping operation locking mechanical system is the same with L utmost point tripping operation locking structure, nevertheless because shared space is great, the utility model discloses simplify the design with N utmost point tripping operation locking mechanical system, N utmost point tripping operation locking mechanical system comprises the sliding end 51 and the spacing portion 82 of second U-shaped pole 5. The N-pole contact mechanism is connected with the handle 1 through the second U-shaped rod 5, one end of the second U-shaped rod 5 is connected with the handle 1, the other end of the second U-shaped rod is connected with the N-pole contact mechanism, one end of the second driving spring 3 is connected with the shell, and the other end of the second driving spring is connected with the N-pole moving contact 8. One end of the second U-shaped rod 5 connected with the N-pole contact mechanism is used as a sliding end 51, the N-pole tripping locking mechanism comprises a limiting part 82 arranged on the N-pole contact mechanism and a sliding end 51 arranged on the second U-shaped rod 5, when the switch is switched on, the handle 1 pushes the second U-shaped rod 5, the sliding end 51 of the second U-shaped rod 5 is abutted against the limiting part 82 on the N-pole contact mechanism, and the limiting part 82 pushes the N-pole contact mechanism to be switched on; after closing, the sliding end 51 keeps spacing fit with the spacing part 82, and the N-pole tripping locking mechanism is locked; when tripping, the pushing part 71 on the L-pole contact mechanism pushes the sliding end 51 of the second U-shaped rod 5 to release the limit fit with the limit part 82, and the N-pole tripping locking mechanism is unlocked.
The pushing portion 71 is a protrusion formed by extending the L-pole contact mechanism in the direction of the N-pole contact mechanism, the protrusion is in a wedge shape with a thin upper part and a thick lower part, the surface of the pushing portion 71 contacting the sliding end 51 is an inclined surface, and in the process that the pushing portion 71 pushes the sliding end 51 to be released from the limiting matching with the limiting portion 82, a force which is upwards separated from the limiting portion 82 is provided for the sliding end 51.
As shown in fig. 8, as the pushing portion 71 for pushing the sliding end 51, it is preferably disposed convexly on one side of the L-pole contact mechanism close to the N-pole contact mechanism, a rotation distance is left between the pushing portion 71 and the sliding end 51, and the setting of the rotation distance directly affects the pushing portion 71 between the L-pole moving contact 7 and the N-pole moving contact 8 to contact with the sliding end 51 of the second U-shaped rod 5 during the rotation of the L-pole contact mechanism to the stationary contact 6; through set up the promotion portion 71 that promotes second U-shaped pole 5 on lever 7c, set up spout 81 and spacing portion 82 with second U-shaped pole 5 complex on N utmost point moving contact 8, and leave the preset distance between promotion portion 71 and spacing portion 82, the length and the L utmost point moving contact 7 of preset distance, the separating brake time difference of N utmost point moving contact 8 is relevant, therefore, on the basis that does not influence N utmost point contact mechanism apart from, can adjust the separating brake time difference of L utmost point moving contact 7 and N utmost point moving contact 8 through control turning distance, make overall structure compact, do benefit to and save the space in the casing, be applicable to the production of compact product.
Specifically, as shown in fig. 8 and 9, the lever 7c is provided at its middle portion with a connection hole for mounting, preferably a kidney-shaped hole as the connection hole. The middle lower part of the lever 7c is connected with the L pole moving contact 7, one side of the lever 7c close to the L pole moving contact 7 is provided with a jump buckle 7a and a lock catch 7b which are matched and locked with each other, and the jump buckle 7a and the lock catch 7b are positioned in a space between the upper end of the L pole moving contact 7 and the upper end of the lever 7 c. The pushing portion 71 is located at an edge of a side far from the fixed contact 6, and is preferably a protrusion formed by extending the edge of the lever 7c far from the fixed contact 6 toward the N-pole movable contact 8, the protrusion is in a wedge shape with a thin top and a thick bottom, and a surface of the pushing portion 71 contacting the sliding end 51 is an inclined surface. The pushing portion 71 provides a force to the sliding end 51 to disengage from the position-limiting portion 82 in the process of pushing the sliding end 51 to disengage from the position-limiting portion 82. When the circuit has faults of time delay, instantaneity or electric leakage and the like, the circuit breaker needs to protect the circuit to be disconnected, the lock catch 7b is triggered to rotate by the protection components of time delay, instantaneity or electric leakage and the like, the tripping buckle 7a and the lock catch 7b are tripped, and the lever 7c and the L-pole moving contact 7 rotate to the opening position under the action of the first driving spring 2. In the process of opening the L-pole moving contact 7, the pushing portion 71 of the lever 7c pushes the sliding end 51 of the second U-shaped rod 5, so that the surfaces of the second U-shaped rod 5 contacting with the limiting portion 82 are separated, the hasp structure formed on the N-pole contact mechanism is broken, and the N-pole moving contact 8 rotates to the opening position under the action of the second driving spring 3. Therefore, the N-pole contact 8 is triggered to open after the L-pole moving contact 7 is opened for a certain time, and the time for the L-pole contact mechanism and the N-pole contact mechanism to be staggered to open can be adjusted by adjusting the distance between the pushing portion 71 of the lever 7c and the sliding end 51 of the second U-shaped rod 5.
As shown in fig. 3-7 and fig. 9, in order to prevent the position of the handle from affecting the switching-off speed of the N-pole contact mechanism, a sliding groove 81 is provided on the N-pole moving contact, the sliding end 51 of the second U-shaped rod 5 is slidably connected with the sliding groove 81, and a limiting part 82 for limiting the sliding of the second U-shaped rod 5 is provided on the sliding groove 81; the N-pole contact mechanism is provided with a sliding chute 81, and when the switch is switched on, the first U-shaped rod 4 drives the L-pole contact mechanism to rotate towards the direction close to the static contact 6 under the operation of the handle 1; the sliding end 51 of the second U-shaped rod 5 is in contact with the limiting part 82, and the second U-shaped rod 5 drives the N-pole contact mechanism to rotate towards the direction close to the static contact 6 under the operation of the handle 1; during opening, the L-pole contact mechanism rotates in a direction away from the fixed contact 6 under the action of the first driving spring 2, during the rotation of the L-pole contact mechanism, the pushing portion 71 pushes the sliding end 51 of the second U-shaped rod 5 to separate from the limiting portion 82 of the sliding groove 81, the N-pole contact mechanism rotates in a direction away from the fixed contact 6 under the driving of the second driving spring 3 and enables the sliding end 51 of the second U-shaped rod 5 to be in sliding fit with the sliding groove 81, during opening, after the limiting separation of the second U-shaped rod 5 and the sliding groove, relative to the housing, the second U-shaped rod 5 is substantially stationary in a short time, only the N-pole movable contact rotates, one side of the sliding groove 81 away from the fixed contact sideslips the sliding end 51 of the second U-shaped rod 5, and the sliding end 51 and the sliding groove 81 slide relatively, because the opening speed of the N-pole contact mechanism is fast and can reach the opening position before the handle 1, during the handle 1 does not reach the opening position, the sliding groove 81 provides a section of sliding space for the sliding end 51, and when the handle 1 returns, the handle 1 drives the sliding end 51 of the second U-shaped rod 5 to a side close to the static contact 6 from a side of the sliding groove 81 far away from the static contact 6.
In the preferred embodiment, as shown in fig. 4-7, the sliding slot 81 is preferably disposed on the upper portion of the N-pole moving contact 8, so as to dispose the second U-shaped bar 5 on the same level as the first U-shaped bar 4, thereby facilitating the handle 1 to operate the first U-shaped bar 4 and the second U-shaped bar 5 simultaneously, so that the first U-shaped bar 4 and the second U-shaped bar 5 are balanced in stress. The middle part of the N-pole moving contact 8 is provided with a mounting hole used for being mounted on the shell, the mounting hole is a long-strip-shaped kidney-shaped hole, so that the over-travel matching of the moving contact and the fixed contact is conveniently realized, one side, close to the fixed contact 6, of the lower end of the N-pole moving contact 8 is provided with a contact in contact with the fixed contact 6, one side, far away from the fixed contact 6, of the upper end of the N-pole moving contact 8 is provided with a fan-shaped connecting portion 8a which is small in size and large in size, the sliding groove 81 is formed in the.
The inner diameter of the sliding chute 81 needs to be larger than the outer diameter of the sliding end 51 so as to ensure that the sliding end 51 cannot be clamped when the sliding chute and the sliding end 51 slide relatively; when the sliding end 51 slides relative to the sliding groove 81, the sliding end 51 only contacts with the lower part of the sliding groove 81, the upper part of the sliding groove 81 is only used for enabling the sliding end 51 to return to the initial position according to a limited track after the brake is separated, an opening is formed in one end, close to the static contact 6, of the second section of groove, and the bottom edge of the second section of groove is an arc-shaped top with the N-pole moving contact 8 bent downwards; of course, the opening is not provided, and both ends of the sliding groove 81 are closed.
The sliding groove 81 is a stepped sliding groove 81 formed by connecting a first section of groove and a second section of groove which are different in height, the first section of groove is higher than the second section of groove, the first section of groove is positioned on one side, away from the static contact 6, of the N-pole moving contact 8, the second section of groove is positioned on one side, close to the static contact 6, of the N-pole moving contact 8, the limiting part 82 is formed by the connecting part of the first section of groove and the second section of groove, a gap for the sliding end 51 to penetrate through is reserved between the upper part of the limiting part 82 and the upper edge of the sliding groove 81, and the sliding end 51 is beneficial to avoiding the sliding; in order to ensure the limit fit between the sliding end 51 and the limit portion 82, the side wall of the limit portion 82 contacting the sliding end 51 is preferably a concave surface, but the side wall contacting the sliding end 51 may be a straight side. The sliding groove 81 may be a sliding groove 81 with two closed ends or an open sliding groove 81 with one open side, preferably, the open sliding groove 81 with an opening on one side is disposed on one side close to the stationary contact 6, and the inner diameter of the sliding groove 81 is larger than the outer diameter of the sliding end 51 so that the sliding end 51 slides in the sliding groove 81 relative to the sliding groove 81.
As shown in fig. 4 and 5, during closing, the connecting surface of the stepped sliding groove 81 is used as a limiting part 82 to be in limiting fit with the N-pole moving contact 8, so that the N-pole moving contact 8 is smoothly closed, and the arc-shaped bottom edge of the second-stage groove is beneficial to the sliding end 51 to slide to the limiting part 82, so that the sliding end 51 contacts with the limiting part 82, so that the N-pole moving contact 8 rotates towards the direction close to the fixed contact 6; as shown in fig. 6, during opening, under the action of the pushing portion 71, the sliding end 51 is separated from the limiting portion 82, and with respect to the housing, the sliding end 51 is substantially fixed in a short time, only the N-pole moving contact rotates, and by using the height difference of the step structure, the N-pole moving contact 8 rotates to enable the sliding end 51 to avoid the limiting portion 82 to enter the higher first-stage groove and slide therein in the direction away from the fixed contact 6, so that the overall smooth operation of the operating mechanism is ensured, and the compactness of the operating mechanism is also ensured. When tripping occurs, the N-pole moving contact 8 reaches the tripping position before the handle 1 because of high speed, the second U-shaped rod 5 cannot return to the initial position due to the action of the handle 1, and under the rotation of the N-pole contact 8, the sliding end 51 and the sliding groove 81 relatively slide and are positioned in the first section of groove of the sliding groove 81; when the handle 1 is returned to the initial position, the second U-shaped bar 5 is carried along, so that its sliding end 51 leaves the first section of the sliding groove 81 and enters the second section of the sliding groove, as shown in fig. 7.
The opening of the circuit breaker is divided into manual operation and driving operation: the L-pole contact mechanism and the N-pole contact mechanism are directly switched off manually through the handle 1, and the L-pole contact mechanism and the N-pole contact mechanism can be switched off simultaneously; the driving opening is that when the line has fault current or has driving signal, the L pole contact mechanism and the N pole contact mechanism are driven by the driving spring to open. The utility model discloses in the separating brake be the condition of the utmost point contact mechanism of L, the utmost point contact mechanism of N of being driven respectively by first drive spring 2, second drive spring 3 when the circuit breaks down.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (9)
1. The utility model provides a circuit breaker, is including rotating handle (1), the L utmost point contact mechanism and the N utmost point contact mechanism of installing on the casing, and the coaxial pivot of L utmost point contact mechanism and N utmost point contact mechanism is installed in the casing, L utmost point contact mechanism, N utmost point contact mechanism are driven and are closed a floodgate with static contact (6) that correspond through first U-shaped pole (4), second U-shaped pole (5) respectively by handle (1), and L utmost point contact mechanism, N utmost point contact mechanism are through first drive spring (2), second drive spring (3) drive separating brake, its characterized in that respectively: the L pole contact mechanism comprises an L pole tripping locking mechanism, the N pole contact mechanism comprises an N pole tripping locking mechanism, the L pole contact mechanism is further provided with a pushing portion (71), when the circuit breaker trips, the L pole tripping locking mechanism is unlocked, the L pole contact mechanism is opened, the pushing portion (71) of the L pole contact mechanism is moved in the opening direction for a preset distance and then triggers the N pole tripping locking mechanism to unlock, the N pole contact mechanism is opened, and the N pole contact mechanism is later than the L pole contact mechanism.
2. The circuit breaker according to claim 1, wherein the L-pole contact mechanism comprises a lever (7c) and an L-pole moving contact (7), the lever (7c) is connected with the L-pole moving contact (7), and the pushing portion (71) is disposed on a side of the lever (7c) close to the N-pole contact mechanism.
3. The circuit breaker according to claim 2, wherein the L-pole trip locking mechanism further comprises a trip buckle (7a) and a lock catch (7b), the trip buckle (7a) and the lock catch (7b) are pivotally arranged on the lever (7c), after closing, the trip buckle (7a) and the lock catch (7b) are buckled and then locked with the lever (7c) into a whole, and during tripping, the trip buckle (7a) and the lock catch (7b) are unlocked, and the L-pole moving contact (7) is separated from the fixed contact (6).
4. The circuit breaker according to any one of claims 1-3, wherein one end of the second U-shaped rod (5) is connected with the handle (1), the other end is connected with the N-pole contact mechanism, the end of the second U-shaped rod (5) connected with the N-pole contact mechanism is used as a sliding end (51), the N-pole trip locking mechanism comprises a limiting part (82) arranged on the N-pole contact mechanism and a sliding end (51) arranged on the second U-shaped rod (5), when the circuit breaker is closed, the handle (1) pushes the second U-shaped rod (5), the sliding end (51) of the second U-shaped rod (5) abuts against the limiting part (82) on the N-pole contact mechanism, and the N-pole contact mechanism is pushed to be closed by pushing the limiting part (82); after closing, the sliding end (51) keeps spacing fit with the spacing part (82), and the N-pole tripping locking mechanism is locked; when tripping, a pushing part (71) on the L-pole contact mechanism pushes a sliding end (51) of the second U-shaped rod (5) to be released from limiting fit with a limiting part (82), and the N-pole tripping locking mechanism is unlocked.
5. The circuit breaker according to claim 4, wherein the pushing portion (71) is a protrusion extending from the L-pole contact mechanism to the N-pole contact mechanism, the protrusion is wedge-shaped and thin at the top and thick at the bottom, and the surface of the pushing portion (71) contacting with the sliding end (51) is an inclined surface.
6. The circuit breaker according to claim 4, wherein the N-pole contact mechanism comprises an N-pole moving contact (8), the limiting portion (82) is arranged on the N-pole moving contact (8), a sliding groove (81) is further arranged at the upper end of the N-pole moving contact (8), the sliding groove (81) is formed by connecting a first section of groove and a second section of groove which are different in height to form a step-shaped sliding groove (81), the first section of groove is higher than the second section of groove, the first section of groove is located on one side, away from the fixed contact (6), of the N-pole moving contact (8), the second section of groove is located on one side, close to the fixed contact (6), of the N-pole moving contact (8), and the limiting portion (82) is formed by the connection of the first section of groove and the second section.
7. The circuit breaker according to claim 6, wherein the sliding groove (81) is an open sliding groove (81) having an opening at one side, the opening is disposed at a side close to the stationary contact (6), and an inner diameter of the sliding groove (81) is larger than an outer diameter of the sliding end (51) so that the sliding end (51) slides in the sliding groove (81) relative to the sliding groove (81).
8. The circuit breaker according to claim 3, wherein one end of the first U-shaped rod (4) is connected with the handle (1), the other end is connected with the trip (7a), the L-pole moving contact (7) is connected with the lever (7c) and coaxially mounted on the shell, one end of the first driving spring (2) is connected with the shell, and the other end is connected with the L-pole moving contact (7).
9. The circuit breaker according to claim 6, characterized in that said second driving spring (3) is connected to the housing at one end and to the N-pole moving contact (8) at the other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921472441.6U CN210866092U (en) | 2019-09-05 | 2019-09-05 | Circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921472441.6U CN210866092U (en) | 2019-09-05 | 2019-09-05 | Circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN210866092U true CN210866092U (en) | 2020-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921472441.6U Active CN210866092U (en) | 2019-09-05 | 2019-09-05 | Circuit breaker |
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| Country | Link |
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| CN (1) | CN210866092U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112863953A (en) * | 2021-01-05 | 2021-05-28 | 华通机电股份有限公司 | Asynchronous double-break contact mechanism and residual current operated circuit breaker |
-
2019
- 2019-09-05 CN CN201921472441.6U patent/CN210866092U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112863953A (en) * | 2021-01-05 | 2021-05-28 | 华通机电股份有限公司 | Asynchronous double-break contact mechanism and residual current operated circuit breaker |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: ZHEJIANG CHINT ELECTRICS Co.,Ltd. Assignor: Shanghai Chint Intelligent Technology Co.,Ltd. Contract record no.: X2021330000591 Denomination of utility model: Circuit breaker Granted publication date: 20200626 License type: Common License Record date: 20211025 |
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| EE01 | Entry into force of recordation of patent licensing contract |