CN111540649A - Miniature circuit breaker, locking and tripping system and locking and tripping method - Google Patents
Miniature circuit breaker, locking and tripping system and locking and tripping method Download PDFInfo
- Publication number
- CN111540649A CN111540649A CN202010485709.0A CN202010485709A CN111540649A CN 111540649 A CN111540649 A CN 111540649A CN 202010485709 A CN202010485709 A CN 202010485709A CN 111540649 A CN111540649 A CN 111540649A
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- handle
- push rod
- tripping
- handle push
- circuit breaker
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/1009—Interconnected mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
- H01H71/521—Details concerning the lever handle
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Abstract
The invention discloses a miniature circuit breaker, a locking and tripping system and a locking and tripping method, wherein the locking and tripping system comprises a handle, a handle push rod, a mechanism bracket, a handle push rod reset spring, a mechanism main spring, a handle reset spring and a tripping piece; the handle return spring provides a return torque for the handle, the handle push rod is positioned between the handle and the mechanism support and respectively propped against the handle and the mechanism support, and after the handle rotates past a dead point, a locking force is provided for the mechanism support; under the brake-off state of the circuit breaker, the push rod reset spring drives the push rod to reset; the jump buckle piece pushes the handle push rod to separate the handle push rod from a contact surface of the mechanism support, so that a tripping process is realized. The locking function of the invention is directly realized by the angle cooperation of the interaction of the handle push rod and the mechanism bracket, the structure is simple, and no additional locking piece is needed; in the tripping process, the tripping piece does not need to overcome the locking force, the tripping speed can be obviously improved, the material cost and the assembly difficulty are reduced, and the reliability of the circuit breaker is improved.
Description
Technical Field
The invention relates to the technical field of miniature circuit breakers, in particular to a miniature circuit breaker, a locking and tripping system and a locking and tripping method.
Background
The miniature circuit breaker is important control and protection equipment in a low-voltage power distribution system, and the reliable contact of a moving contact and a static contact is ensured through a locking fastener in a normal through-current state; when overload or short circuit fault occurs, the thermal tripping or instantaneous tripping system of the miniature circuit breaker acts, and the tripping function of the operating mechanism is generally completed through the tripping piece, so that the breaking of fault current is realized. Therefore, the reliability of the miniature circuit breaker latch and method thereof, and the stability and accuracy of the trip and method thereof are very important to the control and protection functions of the circuit breaker.
Currently, there are two types of latching methods commonly used for miniature circuit breakers: firstly, a method of abutting the locking part with the mechanism bracket is utilized, and secondly, a method of abutting the locking part with the handle push rod is utilized. Generally, the two main locking methods exist, and have the risk of the failure of the locking piece, such as the change of the surface roughness of the locking piece, which leads to the slide-fastening, etc. Corresponding to the locking method, the currently used snap fastener and the method are as follows: when overload or short circuit fault occurs, the bimetallic strip or the electromagnetic tripping system acts to drive the tripping piece to act, and the tripping piece further pushes the locking piece to act. It can be seen that the action of the existing jump fastener must overcome the acting force of the locking fastener and the mechanism bracket or the handle push rod, which causes the problems of large tripping force and slow speed.
As described above, the conventional locking device and method have a risk of reliability reduction in long-term application, and the tripping device and method have problems of large tripping force and slow speed, and the reliability and electrical performance of the miniature circuit breaker can be significantly improved by solving the problems in design.
Disclosure of Invention
In view of the defects in the prior art and the above-mentioned needs, an object of the present invention is to provide a miniature circuit breaker, a latching and tripping system and a latching and tripping method, which can avoid the risk of reduced reliability of the conventional latching member and method during long-term application, and solve the problems of large tripping force and low speed of the tripping member and method.
The invention is implemented by the following technical scheme:
the locking and tripping system of the miniature circuit breaker comprises a handle, a handle push rod, a mechanism bracket and a tripping piece; the mechanism bracket is provided with a contact surface which is used for contacting with the handle push rod;
one end of the handle push rod is rotatably connected with the handle, the other end of the handle push rod is abutted against the contact surface of the mechanism bracket, and the thrust direction of the handle push rod to the mechanism bracket is vertical to the contact surface;
the mechanism support is connected with a mechanism main spring, and the mechanism main spring is used for providing acting force in the opening direction for the mechanism support;
the handle is connected with a handle return spring which is used for deforming in a switching-on state of the miniature circuit breaker and providing a return torque in a switching-off direction for the handle;
the handle push rod is connected with a handle push rod return spring, and the handle push rod return spring is used for deforming when the handle push rod leaves the contact surface of the mechanism bracket and providing a return force for the handle push rod;
the tripping piece is rotatably connected with a shell of the miniature circuit breaker or the mechanism support, the tripping piece is used for driving the handle push rod to be separated from a contact surface of the mechanism support in a tripping process, and the direction of the force of the handle push rod driven by the tripping piece is perpendicular to the direction of the acting force between the handle push rod and the mechanism support or forms an acute angle with the direction of the acting force between the handle push rod and the mechanism support in the tripping process.
Preferably, the mechanism main spring is a torsion spring, and two arms of the mechanism main spring are respectively connected with the mechanism bracket and the shell of the miniature circuit breaker.
Preferably, the handle return spring is a torsion spring, and two arms of the handle return spring are respectively connected with the handle and the shell.
Preferably, the handle push rod return spring is a tension spring, one end of the handle push rod return spring is fixed on the mechanism support or the shell of the miniature circuit breaker, and the other end of the handle push rod return spring is connected with the handle push rod.
Preferably, the jump buckle piece is provided with a mounting hole, and the jump buckle piece is sleeved on the mechanism bracket or the shell of the miniature circuit breaker through the mounting hole.
The miniature circuit breaker is provided with the locking and tripping system of the miniature circuit breaker.
The invention discloses a locking and tripping method of a miniature circuit breaker, which is characterized by comprising the following processes:
the locking process: in the switching-on process, the handle pushes the handle push rod to move, and the handle push rod pushes the mechanism bracket to move; the handle push rod reacts on the handle, after the reaction force of the handle push rod in the switching-on process rotates through a dead point of the handle, the reaction torque of the handle push rod on the handle is changed from the switching-off direction to the switching-on direction, and the handle push rod realizes the locking of the mechanism support through the thrust on the contact surface of the mechanism support;
and (3) tripping process: in a closing state, the tripping piece rotates under the thrust action of a tripping system of the miniature circuit breaker, and further pushes the handle push rod to make the handle push rod break away from the contact with the contact surface of the mechanism bracket, so that the mechanism bracket performs reset motion under the action of a mechanism main spring to complete a tripping process; the handle push rod is reset to the opening position under the action of the handle push rod reset spring.
Preferably, connecting lines of the two end parts of the handle push rod in the opening and closing states are positioned on two sides of the center of the handle rotating shaft, and in the closing state, the connecting lines of the two end parts of the handle push rod are perpendicular to the contact surface of the mechanism support.
Compared with the prior art, the invention has the following beneficial effects:
the miniature circuit breaker locking and tripping system realizes the locking function by the pushing force of the handle push rod to the contact surface of the mechanism bracket, and can effectively avoid the problem of locking reliability reduction caused by the phenomena of contact surface roughness change, contact surface deformation and the like when a locking piece is used for a long time. The force of the jump buckle piece for pushing the handle push rod is vertical to or forms an acute angle with the force between the handle push rod and the mechanism support, the counter-acting force does not need to be overcome, the tripping force is small, and the tripping speed is high. Therefore, the invention can avoid the risk of reliability reduction in long-term application of the conventional locking piece and method, and solves the problems of high tripping force and low speed of the tripping piece and method. In addition, the locking and tripping system of the miniature circuit breaker provided by the invention only needs one tripping piece, and compared with the common locking piece and tripping piece, the manufacturing cost and the assembly difficulty are both obviously reduced.
The miniature circuit breaker has the advantages of high reliability, small tripping force and high tripping speed in long-term application.
In the locking and tripping method of the miniature circuit breaker, when tripping is carried out, in a closing state, the tripping piece rotates under the thrust action of the tripping system of the miniature circuit breaker, the handle push rod is further pushed, so that the handle push rod is separated from the contact with the contact surface of the mechanism bracket, and the force of the tripping piece pushing the handle push rod is vertical to or forms an acute angle with the force between the handle push rod and the mechanism bracket, so that the counter-acting force does not need to be overcome, the tripping force is small, and the tripping speed is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1(a) is a schematic diagram of a case where a direction of an upward pushing force F1 of a trip catch of a miniature circuit breaker on a handle push rod in a closing state is perpendicular to a direction of a pushing force F2 of a mechanism bracket on the handle push rod, according to embodiment 1 of the present invention, and fig. 1(b) is a force analysis diagram of fig. 1 (a).
Fig. 2(a) is a schematic diagram when the direction of the upward pushing force F1 of the trip catch of the miniature circuit breaker on the handle push rod forms an acute angle with the direction of the pushing force F2 of the mechanism bracket on the handle push rod in the closing state provided by embodiment 2 of the present invention, and fig. 2(b) is a force analysis diagram of fig. 2 (a).
Fig. 3(a) is a schematic diagram of a case where a direction of a downward pulling force F1 of the miniature circuit breaker trip catch on the handle push rod in a closing state is perpendicular to a direction of a pushing force F2 of the mechanism bracket on the handle push rod, according to embodiment 3 of the present invention, and fig. 3(b) is a force analysis diagram of fig. 3 (a).
Fig. 4(a) is a schematic diagram when a direction of a downward pulling force F1 of the trip catch of the miniature circuit breaker on the handle push rod forms an acute angle with a direction of a pushing force F2 of the mechanism bracket on the handle push rod in a closing state according to embodiment 4 of the present invention, and fig. 4(b) is a force analysis diagram of fig. 4 (a).
Fig. 5(a) is a schematic diagram when the direction of the upward pushing force F1 of the trip catch of the miniature circuit breaker on the handle push rod in the closing state is perpendicular to the direction of the pulling force F2 of the mechanism bracket on the handle push rod, which is provided by embodiment 5 of the present invention, and fig. 5(b) is a force analysis diagram of fig. 5 (a).
Fig. 6(a) is a schematic diagram when the direction of the upward pushing force F1 of the trip catch of the miniature circuit breaker on the handle push rod forms an acute angle with the direction of the pulling force F2 of the mechanism bracket on the handle push rod in the closing state provided in embodiment 6 of the present invention, and fig. 6(b) is a force analysis diagram of fig. 6 (a).
Fig. 7(a) is a schematic diagram of a case where a direction of a downward pulling force F1 of the miniature circuit breaker trip catch on the handle push rod in a closing state is perpendicular to a direction of a pulling force F2 of the mechanism bracket on the handle push rod, according to embodiment 7 of the present invention, and fig. 7(b) is a force analysis diagram of fig. 7 (a).
Fig. 8(a) is a schematic diagram when a direction of a downward pulling force F1 of the trip catch of the miniature circuit breaker on the handle push rod forms an acute angle with a direction of a pulling force F2 of the mechanism bracket on the handle push rod in a closing state according to embodiment 8 of the present invention, and fig. 8(b) is a force analysis diagram of fig. 8 (a).
Fig. 9 is a front view of the tripping state of the latching and tripping system of the miniature circuit breaker according to embodiment 9 of the present invention.
Fig. 10 is a front view of a closing state of the latching and tripping system of the miniature circuit breaker according to embodiment 9 of the present invention.
Fig. 11 is a rear view of a closed state of the latching and tripping system of the miniature circuit breaker according to embodiment 9 of the present invention.
Wherein, 1, connecting hole, 2, handle push rod, 3, contact point, 4, contact surface, 5, handle, 6, mechanism support, 7, handle push rod reset spring, 8, mechanism main spring, 9, handle reset spring, 10, jump fastener
Detailed Description
The technical solutions of the embodiments of the present invention are clearly and completely described below with reference to the drawings of nine embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 9 to 11, the locking and tripping system of the miniature circuit breaker of the present invention comprises a handle 5, a handle push rod 2, a mechanism support 6, a handle push rod return spring 7, a mechanism main spring 8, a handle return spring 9, and a trip member 10;
the handle push rod 2 is positioned between the handle 5 and the mechanism support 6, one end of the handle push rod 2 is connected with the handle 5, the other end of the handle push rod 2 is abutted against the contact surface of the mechanism support 6, and the thrust direction of the handle push rod 2 to the mechanism support 6 is vertical to the contact surface;
the mechanism main spring 8 is a torsion spring, two arms of the mechanism main spring 8 are respectively connected with the mechanism bracket 6 and the shell, and deform under the switching-on state of the circuit breaker to provide acting force in the switching-off direction for the mechanism bracket 6;
the handle return spring 9 is a torsion spring, two arms of the handle return spring 9 are respectively connected with the handle 5 and the shell, and the handle return spring 9 deforms under the closing state of the circuit breaker to provide a return torque in the opening direction for the handle 5;
the handle push rod return spring 7 is a tension spring, one end of the handle push rod return spring 7 is fixed on the shell or the mechanism bracket 6, and the other end of the handle push rod return spring is connected with the handle push rod 2; when the handle push rod 2 leaves the contact surface with the mechanism bracket 6, the handle push rod return spring 7 deforms to provide a return force for the handle push rod 2;
the tripping device 10 is provided with a mounting hole and sleeved on the shell or the mechanism support, in the tripping process, the electromagnetic tripping mechanism or the thermal tripping mechanism of the circuit breaker acts to drive the tripping device 10 to act, the tripping device 10 drives the handle push rod 2 to be separated from the contact surface of the mechanism support 6, the mechanism support 6 is reset to a tripping position under the action force of the mechanism main spring 8, and the handle push rod 2 is reset under the action of the handle push rod reset spring 9.
The invention discloses a locking and tripping method of a locking and tripping system of a miniature circuit breaker, which comprises the following processes:
the locking process: in the switching-on process of the miniature circuit breaker, the handle 5 pushes the handle push rod 2 to move, and the handle push rod 2 pushes the mechanism bracket 6 to move; the handle push rod 2 reacts on the handle 5, after the reaction force of the handle push rod 2 rotates past a dead point of the handle 5 in the switching-on process, the reaction torque of the handle push rod 2 on the handle 5 is changed from the switching-off direction to the switching-on direction, and the handle push rod 2 realizes the locking function on the mechanism support 6 through the thrust on the contact surface of the mechanism support 6;
and (3) tripping process: in a closing state of the miniature circuit breaker, the tripping piece 10 rotates under the thrust action of a tripping system to further push the handle push rod 2, so that the handle push rod 2 is separated from a contact surface with the mechanism support 6, the mechanism support 6 generates a reset motion under the action of the mechanism main spring 8, and a tripping process is completed; and the handle push rod 2 is reset to the opening position under the action of the handle push rod reset spring 7.
In a preferred embodiment of the present invention, in the latching and tripping system of the miniature circuit breaker, connecting lines at two end portions of the handle push rod 2 in the opening and closing states are located at two sides of a center of a rotating shaft of the handle 5, and in the closing state, the connecting lines at two end portions of the handle push rod 2 are perpendicular to a contact surface of the mechanism bracket 6.
In the latching and tripping system of the miniature circuit breaker provided by the invention, in the tripping process, the direction of the force of the tripping piece 10 driving the handle push rod 2 is consistent with the tangential direction of the handle push rod 2 rotating around the end part at the side of the handle 5.
In the latching and tripping system of the miniature circuit breaker provided by the invention, in the tripping process, the direction of the force of the tripping piece 10 driving the handle push rod 2 is vertical to or forms an acute angle with the direction of the acting force of the handle push rod 2 and the mechanism bracket 6.
In the latching and tripping system of the miniature circuit breaker provided by the invention, the included angle between the acting force direction of the handle push rod 2 and the mechanism bracket 6 and the moving direction of the handle push rod 2 in the tripping process is 90-120 degrees.
As a preferred embodiment of the present invention, in the latching and tripping system of the miniature circuit breaker provided by the present invention, the trip unit 10 adopts a rotating structure, and the trip unit 10 rotates under the action of the tripping system, so as to push the handle push rod 2.
1. The embodiment 1 of the invention provides a locking and tripping system of a miniature circuit breaker, as shown in fig. 1(a) and fig. 1(b), in a closing state, the left side of a handle push rod 2 is rotatably connected with a handle 5 through a connecting hole 1 on the handle 5, the handle 5 provides a rightward thrust for the handle push rod 2 and is positioned at a position passing through a handle rotation dead point, the right side of the handle push rod 2 abuts against a contact surface 4 on a mechanism support 6 (the contact surface 4 is a contact surface of the mechanism support and the handle push rod), and the locking function of the miniature circuit breaker mechanism is realized by the thrust of the handle push rod 2 to the contact surface 4 on the mechanism support; in the tripping process, the tripping piece 10 drives the handle push rod 2 to be separated from the contact surface 4 on the mechanism bracket by the upward pushing force F1 on the handle push rod 2, so that the tripping process is completed, and in the embodiment, the direction of the upward pushing force F1 of the tripping piece 10 on the handle push rod 2 is perpendicular to the direction of the pushing force F2 of the contact surface 4 on the mechanism bracket on the handle push rod 2, so that the tripping can be realized by the F1 without overcoming the action of the F2.
2. The embodiment 2 of the invention provides a locking and tripping system of a miniature circuit breaker, as shown in fig. 2(a) and fig. 2(b), in a closing state, the left side of a handle push rod 2 is rotatably connected with a handle 5 through a connecting hole 1 on the handle 5, the handle 5 provides a rightward thrust for the handle push rod 2 and is positioned at a position passing through a handle rotation dead point, the right side of the handle push rod 2 abuts against a contact surface 4 on a mechanism support, and the locking function of a miniature circuit breaker mechanism is realized by the thrust of the handle push rod 2 to the contact surface 4 on the mechanism support; in the tripping process, the tripping piece 10 drives the handle push rod 2 to be separated from the contact surface 4 on the mechanism bracket by the upward pushing force F1 of the handle push rod 2, so that the tripping process is completed.
3. Embodiment 3 of the present invention provides a latching and tripping system for a miniature circuit breaker, as shown in fig. 3(a) and 3(b), in a closing state, the left side of a handle push rod 2 is rotatably connected to a handle 5 through a connecting hole 1 on the handle 5, the handle provides a rightward thrust for the handle push rod 2, and is located at a position passing through a handle rotation dead point, the right side of the handle push rod 2 abuts against a contact surface 4 on a mechanism support 6, and the latching function of the miniature circuit breaker mechanism is realized by the thrust of the handle push rod 2 to the contact surface 4; in the tripping process, the tripping piece 10 drives the handle push rod 2 to be separated from the contact surface 4 on the mechanism support by the downward pulling force F1 on the handle push rod 2, so that the tripping process is completed, and in the embodiment, the direction of the downward pulling force F1 of the tripping piece 10 on the handle push rod 2 is vertical to the direction of the pushing force F2 of the mechanism support contact surface 4 on the handle push rod 2, so that the tripping can be realized by the F1 without overcoming the action of the F2.
4. Embodiment 4 of the present invention provides a latching and tripping system for a miniature circuit breaker, as shown in fig. 4(a) and 4(b), in a closing state, the left side of a handle push rod 2 is rotatably connected to a handle 5 through a connecting hole 1 on the handle 5, the handle provides a rightward thrust for the handle push rod 2, the handle push rod is located at a position passing through a handle rotation dead point, the right side of the handle push rod 2 abuts against a contact surface 4 on a mechanism support, and the latching function of the miniature circuit breaker mechanism is realized by the thrust of the handle push rod 2 to the contact surface 4 on the mechanism support; in the tripping process, the handle push rod 2 is driven to be separated from the mechanism support contact surface 4 by the downward pulling force F1 of the handle push rod 2 by the tripping piece, and the tripping process is completed.
5. Embodiment 5 of the present invention provides a latching and tripping system for a miniature circuit breaker, as shown in fig. 5(a) and 5(b), in a closing state, the left side of a handle push rod 2 is rotatably connected to a handle 5 through a connecting hole 1 on the handle 5, the handle provides a left pulling force for the handle push rod 2, the handle is located at a position passing through a handle rotation dead point, the right side of the handle push rod 2 is connected to a contact surface 4 on a mechanism support, and the latching function of the miniature circuit breaker mechanism is realized by the pulling force of the handle push rod 2 on the contact surface 4 on the mechanism support; in the tripping process, the upward pushing force F1 of the handle push rod 2 on the tripping piece drives the handle push rod 2 to be separated from the contact surface 4 on the mechanism support, so that the tripping process is completed.
6. Embodiment 6 of the present invention provides a latching and tripping system for a miniature circuit breaker, as shown in fig. 6(a) and 6(b), in a closing state, the left side of a handle push rod 2 is rotatably connected to a handle 5 through a connecting hole 1 on the handle 5, the handle provides a left pulling force for the handle push rod 2, the handle push rod is located at a position passing through a handle rotation dead point, the right side of the handle push rod 2 is connected to a contact surface 4 on a mechanism support, and a latching function of a miniature circuit breaker mechanism is realized by the pulling force of the handle push rod 2 on the contact surface 4 on the mechanism support; in the tripping process, the handle push rod 2 is driven to be separated from the contact surface 4 on the mechanism support by the upward pushing force F1 of the handle push rod 2 by the tripping piece, so that the tripping process is completed.
7. Embodiment 7 of the present invention provides a latching and tripping system for a miniature circuit breaker, as shown in fig. 7(a) and 7(b), in a closing state, the left side of a handle push rod 2 is rotatably connected to a handle 5 through a connecting hole 1 on the handle 5, the handle provides a left pulling force for the handle push rod 2, and is located at a position passing through a handle rotation dead point, the right side of the handle push rod 2 is connected to a contact surface 4 on a mechanism support, and a latching function of a miniature circuit breaker mechanism is realized by using the pulling force of the handle push rod 2 on the contact surface 4 on the mechanism support; in the tripping process, the tripping piece drives the handle push rod 2 to be separated from the contact surface 4 on the mechanism bracket through the downward pulling force F1 of the handle push rod 2, so that the tripping process is completed.
8. Embodiment 8 of the present invention provides a latching and tripping system for a miniature circuit breaker, as shown in fig. 8(a) and 8(b), in a closing state, the left side of a handle push rod 2 is rotatably connected to a handle 5 through a connecting hole 1 on the handle 5, the handle provides a left pulling force for the handle push rod 2, the handle push rod is located at a position passing through a handle rotation dead point, the right side of the handle push rod 2 is connected to a contact surface 4 on a mechanism support, and a latching function of a miniature circuit breaker mechanism is realized by the pulling force of the handle push rod 2 on the contact surface 4 on the mechanism support; in the tripping process, the tripping piece drives the handle push rod 2 to be separated from the contact surface 4 on the mechanism support through the downward pulling force F1 of the handle push rod 2, so that the tripping process is completed.
9. Embodiment 9 of the present invention provides a latching and tripping system for a miniature circuit breaker, as shown in fig. 9 to 11, including a handle 5, a handle push rod 2, a mechanism bracket 6, a handle push rod return spring 7, and a trip buckle 8. The handle push rod 2 is positioned between the handle 5 and the mechanism bracket 6, the left end of the handle push rod 2 is rotatably connected with the handle 5, and the section of the handle push rod 2 is propped against the contact surface 4 on the mechanism bracket 6; the handle push rod reset spring 7 is arranged on the mechanism bracket 6, and the handle push rod reset spring 7 provides reset force for the handle push rod 2 in the brake-off state of the circuit breaker; the tripping piece 10 is arranged on the shell of the miniature circuit breaker, and the handle push rod 2 is pushed by the tripping piece 10 to be separated from the contact surface of the mechanism support 6 to realize the tripping process. In the switching-on process of the miniature circuit breaker, the handle 5 pushes the handle push rod 2 to move, the handle push rod 2 pushes the mechanism support 6 to move, and the handle push rod 2 realizes the locking function of the mechanism support 6 through the pushing force of the mechanism support 6; in a closing state of the miniature circuit breaker, the tripping piece 10 moves to push the handle push rod 2, so that the handle push rod 2 is separated from a contact surface with the mechanism support 6, and the mechanism support 6 finishes a tripping process under the action force of the mechanism main spring 8; the handle push rod 2 is reset to the opening position under the action of a handle push rod reset spring 7.
The above-described embodiments are merely intended to illustrate the objects and technical features of the present invention, and do not limit the contents thereof. It is intended that the present invention cover such alternatives, modifications and variations as may be included within the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The miniature circuit breaker locking and tripping system is characterized by comprising a handle (5), a handle push rod (2), a mechanism bracket (6) and a tripping piece (10); the mechanism bracket (6) is provided with a contact surface which is used for contacting with the handle push rod (2);
one end of the handle push rod (2) is rotatably connected with the handle (5), the other end of the handle push rod (2) is abutted against the contact surface of the mechanism support (6), and the thrust direction of the handle push rod (2) to the mechanism support (6) is vertical to the contact surface;
the mechanism support (6) is connected with a mechanism main spring (8), and the mechanism main spring (8) is used for providing acting force in the opening direction for the mechanism support (6);
the handle (5) is connected with a handle return spring (9), and the handle return spring (9) is used for deforming in the switching-on state of the miniature circuit breaker and providing a return torque in the switching-off direction for the handle (5);
the handle push rod (2) is connected with a handle push rod reset spring (7), and the handle push rod reset spring (7) is used for deforming when the handle push rod (2) leaves the contact surface of the mechanism bracket (6) and providing reset force for the handle push rod (2);
the tripping device (10) is rotationally connected with a shell or a mechanism support (6) of the miniature circuit breaker, the tripping device (10) is used for driving the handle push rod (2) to be separated from a contact surface of the mechanism support (6) in a tripping process, and the direction of a force of the handle push rod (2) driven by the tripping device (10) is vertical to the direction of a force between the handle push rod (2) and the mechanism support (6) or forms an acute angle in the tripping process.
2. The miniature circuit breaker trip and latch system of claim 1 wherein said mechanism main spring (8) is a torsion spring, and wherein the arms of the mechanism main spring (8) are connected to the mechanism bracket (6) and the miniature circuit breaker housing, respectively.
3. The miniature circuit breaker latch and trip system according to claim 1 wherein said handle return spring (9) is a torsion spring, and wherein the arms of said handle return spring (9) are connected to the handle (5) and the housing, respectively.
4. The miniature circuit breaker locking and tripping system according to claim 1, wherein the handle push rod return spring (7) is a tension spring, one end of the handle push rod return spring (7) is fixed on the mechanism bracket (6) or the shell of the miniature circuit breaker, and the other end is connected with the handle push rod (2).
5. The miniature circuit breaker trip and latch system of claim 1 wherein said trip unit (10) has a mounting hole formed therein, and said trip unit (10) is mounted to said mechanism frame (6) or to said miniature circuit breaker housing through said mounting hole.
6. Miniature circuit breaker, characterized in that it has a miniature circuit breaker latch and trip system according to any of claims 1-5.
7. The method of latching and tripping the miniature circuit breaker of claim 6, comprising the steps of:
the locking process: in the closing process, the handle (5) pushes the handle push rod (2) to move, and the handle push rod (2) pushes the mechanism bracket (6) to move; the handle push rod (2) reacts on the handle (5), after the reaction force of the handle push rod (2) rotates the dead point of the handle (5) in the closing process, the reaction torque of the handle push rod (2) on the handle (5) is changed from the opening direction to the closing direction, and the handle push rod (2) realizes the locking of the mechanism support (6) through the thrust on the contact surface of the mechanism support (6);
and (3) tripping process: in a closing state, the tripping piece (10) rotates under the thrust action of a tripping system of the miniature circuit breaker, the handle push rod (2) is further pushed, the handle push rod (2) is separated from the contact with the contact surface of the mechanism support (6), the mechanism support (6) generates reset motion under the action force of a mechanism main spring (8), and the tripping process is completed; the handle push rod (2) is reset to the opening position under the action of a handle push rod reset spring (7).
8. The locking and releasing method according to claim 7, wherein connecting lines of two end portions of the handle push rod (2) in the opening and closing states are located on two sides of the center of a rotating shaft of the handle (5), and in the closing state, the connecting lines of the two end portions of the handle push rod (2) are perpendicular to a contact surface of the mechanism support (6).
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| CN202010485709.0A CN111540649A (en) | 2020-06-01 | 2020-06-01 | Miniature circuit breaker, locking and tripping system and locking and tripping method |
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| CN202010485709.0A CN111540649A (en) | 2020-06-01 | 2020-06-01 | Miniature circuit breaker, locking and tripping system and locking and tripping method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016008298A1 (en) * | 2014-07-17 | 2016-01-21 | 正泰集团股份有限公司 | Operation device of multi-pole miniature circuit breaker |
| CN109243932A (en) * | 2018-10-11 | 2019-01-18 | 上海永继电气股份有限公司 | A kind of breaker operator system |
| CN109616385A (en) * | 2018-12-25 | 2019-04-12 | 浙江零壹智能电器研究院有限公司 | Miniature circuit breaker operating mechanism |
| CN111463081A (en) * | 2020-03-31 | 2020-07-28 | 浙江零壹智能电器研究院有限公司 | Miniature circuit breaker locking and tripping system and method |
-
2020
- 2020-06-01 CN CN202010485709.0A patent/CN111540649A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016008298A1 (en) * | 2014-07-17 | 2016-01-21 | 正泰集团股份有限公司 | Operation device of multi-pole miniature circuit breaker |
| CN109243932A (en) * | 2018-10-11 | 2019-01-18 | 上海永继电气股份有限公司 | A kind of breaker operator system |
| CN109616385A (en) * | 2018-12-25 | 2019-04-12 | 浙江零壹智能电器研究院有限公司 | Miniature circuit breaker operating mechanism |
| CN111463081A (en) * | 2020-03-31 | 2020-07-28 | 浙江零壹智能电器研究院有限公司 | Miniature circuit breaker locking and tripping system and method |
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