CN107808806B - Turnable movable contact component and switching device - Google Patents
Turnable movable contact component and switching device Download PDFInfo
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- CN107808806B CN107808806B CN201711075353.8A CN201711075353A CN107808806B CN 107808806 B CN107808806 B CN 107808806B CN 201711075353 A CN201711075353 A CN 201711075353A CN 107808806 B CN107808806 B CN 107808806B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
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Abstract
The utility model provides a movable contact subassembly can overturn, movable contact subassembly pivot installation can overturn in the casing, movable contact subassembly can overturn includes the big pivot of pivotal connection in the casing, the epaxial moving contact of pivotal connection in big pivot, and the moving contact passes through contact spring to be installed in big pivot, and big pivot drives the moving contact and rotates and install the static contact cooperation in the casing, the one end of moving contact is connected with first limit structure, be equipped with in the big pivot with first limit structure normal running fit's second limit structure, during the short circuit, produce electronic repulsion between moving contact and the static contact and drive the moving contact and rotate and separate with the static contact for big pivot, and make the first limit structure of moving contact and the epaxial second limit structure normal running fit of big pivot.
Description
Technical Field
The invention relates to the field of low-voltage electric appliances, in particular to a turnable movable contact assembly and a switching electric appliance.
Background
The plastic shell type circuit breaker is used as a switching device, and can not only normally switch on and off the current in a circuit in a power supply and distribution circuit, but also automatically cut off a power supply when an overload or short-circuit fault occurs in the circuit, thereby protecting a conductive circuit, electric equipment in the circuit and a power supply.
The rated limit short-circuit breaking capacity is a very key index in the technical indexes of the circuit breaker, represents the size of the short-circuit current which can be broken by the circuit breaker in a power supply and distribution line, and also determines the use range of the circuit breaker in the power supply and distribution line. Generally, the rated limit short-circuit breaking capacity of a circuit breaker in a power supply and distribution line is required to be larger than the maximum short-circuit current which can be generated in the line.
The current limiting technology is the most extensive and effective measure for improving the rated limit short circuit breaking capacity of the circuit breaker at present. The current limiting technique most commonly used at present is to utilize the electric repulsion between the contacts (the size of the electric repulsion is related to the structure of the moving and static contacts in addition to the size of the electric short-circuit current in the line): when short-circuit current occurs on a circuit protected by the circuit breaker, the moving contact and the static contact can be quickly repelled due to electric repulsion, electric arcs are generated between the two contacts, the electric arcs are composed of gases with positive and negative charge ions, the electric arcs have higher resistance, expected short-circuit current of the circuit breaker in the circuit can be limited within a lower range, and the circuit breaker cannot be damaged due to too large short-circuit current when the short-circuit current is broken.
The moving contact or the static contact or the two of the breaker can rotate around a shaft structurally, so as to achieve the purpose of current limiting, and the prior art mainly has the following defects:
a. the static contact adopts a reversible structure, and the structure not only needs to be added with relevant parts which are convenient for the installation and fixation and normal rotation of the static contact and reliable contact with the moving contact, but also needs to leave enough moving space for the turnover of the static contact, so that the shell of the circuit breaker is required to be higher than other products, and the volume of the whole product is also increased. In addition, the product adopting the structure has more processes during assembly.
b. The moving contact adopts the turnover, can automatic re-setting under the effect of contact spring after the moving contact upset, adopts the circuit breaker of this kind of structure, when the circuit that its was protected meets short-circuit current, the moving contact is repulsed the back and is reseed under the effect of contact spring soon, causes the electric arc between the contact to last the burning easily, or after the electric arc extinguishes again the after-flame again, this will cause bigger scaling loss to the contact of circuit breaker and other spare parts inside the circuit breaker.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the turnable movable contact component and the switching device which are simple and compact in structure, safe and stable in performance and convenient and quick to assemble.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a movable contact subassembly can overturn, movable contact subassembly pivot installation can overturn in casing 1, movable contact subassembly can overturn includes the big pivot 2 of pivotal connection in casing 1, and the moving contact 5 of pivotal connection on big pivot 2, moving contact 5 pass through contact spring 4 and install on big pivot 2, and big pivot 2 drives moving contact 5 and rotates and install the static contact 6 contact cooperation in casing 1, the one end of moving contact 5 is connected with first limit structure, be equipped with on the big pivot 2 with first limit structure normal running fit's second limit structure, during the short circuit, produce electronic repulsion between moving contact 5 and the static contact 6 and drive moving contact 5 and rotate and separate with static contact 6 for big pivot 2, and make the first limit structure of moving contact 5 and the second limit structure spacing cooperation on the big pivot 2.
Further, a moving contact mounting cavity 21 for mounting a moving contact 5 is arranged on the large rotating shaft 2, the moving contact 5 is pivotally mounted on the large rotating shaft 2 through a pivotal connecting shaft 7, the middle part of a contact spring 4 is sleeved on the pivotal connecting shaft 7, the moving contact 5 and the contact spring 4 are mounted on the large rotating shaft 2 through the pivotal connecting shaft 7 after being mounted in the moving contact mounting cavity 21, and after the electrical appliance is tripped, the moving contact 5 and the top of the shell 1 are in contact with each other for limiting and automatic resetting.
Furthermore, the side walls of the two sides of the moving contact mounting cavity 21 are provided with a pivot connecting hole 201 which is matched with the pivot connecting shaft 7 in a mounting manner, one end of the moving contact 5 is provided with a pivot mounting hole 501 which is matched with the pivot connecting shaft 7 in a mounting manner, and the pivot connecting shaft 7 passes through the pivot connecting hole 201, the pivot mounting hole 501 and the middle part of the contact spring 4 to mount the moving contact 5 and the contact spring 4 on the large rotating shaft 2; the two ends of the contact spring 4 are abutted against the moving contact mounting cavity 21 for limiting, and the second limiting structure is abutted against one end of the contact spring 4 for limiting.
Further, the first limit structure is an arc-shaped curved surface 511, the second limit structure is a rotation stop shaft 3 mounted on the large rotating shaft 2, and the rotation stop shaft 3 abuts against one end of the contact spring 4 for limiting.
Furthermore, one end of the movable contact 5 is provided with a limiting protrusion 51 in an upward protruding manner, and one side of the limiting protrusion 51 facing the rotation stop shaft 3 forms an arc-shaped curved surface 511.
Further, the arc-shaped curved surface 511 is provided with a limit protrusion or a limit groove 5111 which is in limit fit with the rotation stop shaft 3.
Further, the arc-shaped curved surface 511 is an arc surface, or a conical curved surface, or a parabolic curved surface.
Further, the contact spring 4 is a double torsion spring, and the two torsion springs are connected through a torsion spring connecting section 422; each torsion spring comprises a cylindrical spring body 41 in the middle, a first end arm 42 and a second end arm 43, wherein the cylindrical spring body 41 extends towards two ends, the cylindrical spring body 41 is provided with a spring mounting hole 401 which is connected with the pivoting connecting shaft 7, the end part of the first end arm 42 is bent to form a bending contact section 421, the torsion spring connecting section 422 is connected with the end parts of the two bending contact sections 421, and the moving contact 5 is arranged between the two torsion springs.
Further, the pivot connection shaft 7 is cylindrical and includes a movable contact pivot shaft 71 whose middle portion is in mounting fit with the movable contact 5 and spring installation shafts 72 at two ends of the movable contact pivot shaft 71 and in mounting fit with the spring installation holes 401 of the two cylindrical spring bodies 41, and the diameter of the spring installation shafts 72 is larger than that of the movable contact pivot shaft 71.
Further, two opposite side walls of the movable contact mounting cavity 21 are recessed to form spring body mounting grooves 202 for mounting the cylindrical spring body 41 of the double torsion spring.
Further, the upper parts of the two opposite side walls of the movable contact mounting cavity 21 of the large rotating shaft 2 are concavely provided with shaft mounting grooves 203 which are matched with the two ends of the rotation stopping shaft 3 in mounting mode, one end of the contact spring 4 is used for limiting and mounting the rotation stopping shaft 3 on the large rotating shaft 2, and the upper part of the movable contact mounting cavity 21 is provided with a cross arm 204 used for increasing the strength of the rotating shaft.
A switch electric appliance comprises the turnable movable contact component and a shell, wherein the turnable movable contact component is arranged in the middle of the shell, an operating system 9 in contact fit with the turnable movable contact component is arranged above the turnable movable contact component, and a handle 8 linked with the operating system 9 is arranged at the top of the shell.
The reversible moving contact assembly comprises a large rotating shaft, a moving contact and a contact spring, wherein the moving contact and the contact spring are installed on the large rotating shaft, a first limiting structure is arranged on the moving contact, a second limiting structure is arranged on the large rotating shaft, the first limiting structure and the second limiting structure are not in limiting fit in a normal state, electric repulsion force is generated between moving contacts and static contacts under short-circuit current, the moving contact can be quickly repelled to rotate relative to the large rotating shaft before the circuit breaker is not disconnected, the first limiting structure and the second limiting structure are in limiting fit, electric arcs are generated between the contacts, the short-circuit current passing through the circuit breaker can be limited, the moving contact cannot be automatically reset due to limiting clamping stagnation of the first limiting structure and the second limiting structure after being overturned, and the moving contact can be reset only after the circuit breaker is disconnected or automatically tripped. The moving contact is installed on the large rotating shaft through the torsion spring, and the moving contact is simple in structure, convenient and fast to assemble, stable and reliable in structure and suitable for mass production. The turnable moving contact component is in running fit with the rotary stopping shaft through the arc-shaped curved surface, the moving contact rotates more smoothly, the moving contact is quickly separated from the static contact to play a role in limiting current when short circuit occurs, in addition, one end of the contact spring is abutted to the rotary stopping shaft for limiting, and one end of the contact spring plays a role in fixing the rotary stopping shaft. The rotary stop shaft is matched with the limiting groove or the limiting protrusion, so that the reliability of limiting clamping stagnation of the first limiting structure and the second limiting structure is improved.
Drawings
FIG. 1 is a cross-sectional view of the switching apparatus of the present invention when closed;
FIG. 2 is a sectional view showing the separation of the moving and stationary contacts in the case of the switching apparatus circuit breaker according to the present invention;
FIG. 3 is a cross-sectional view of the movable contact of the reversible movable contact assembly of the present invention with the movable contact closed;
FIG. 4 is a cross-sectional view of the reversible moving contact assembly of the present invention with the moving contacts separated;
fig. 5 is a schematic structural view of a first embodiment of the movable contact of the present invention;
figure 6 is a schematic structural view of a second embodiment of the contact of the present invention;
figure 7 is a schematic structural view of a third embodiment of a contact of the present invention;
FIG. 8 is a schematic perspective view of a large spindle according to the present invention;
FIG. 9 is a perspective view of the contact spring of the present invention;
fig. 10 is a perspective view of the pivot connecting shaft of the present invention.
Detailed Description
The following embodiments of the reversible moving contact assembly and the switching device according to the present invention will be further described with reference to the accompanying drawings of fig. 1 to 10. The reversible moving contact assembly and switching device of the present invention are not limited to the description of the following embodiments.
As shown in fig. 1 and 2, the switching device of the present invention comprises a housing and a turnable moving contact assembly installed therein, wherein the turnable moving contact assembly is installed at the middle part inside the housing, an operating system 9 in contact fit with the turnable moving contact assembly is arranged above the turnable moving contact assembly, a handle 8 linked with the operating system 9 is arranged at the top of the housing, and the handle 8 drives the operating system to move to drive the turnable moving contact assembly to switch on and off a circuit. The switch electric appliance has simple and compact structure and safe and stable performance. The following embodiments are described by taking a plastic case type circuit breaker as an example, and the switching device of the present invention may be a residual current operated circuit breaker, a disconnecting switch, and the like.
As shown in fig. 1-4, the turnable moving contact assembly of the present invention includes a large rotating shaft 2 pivotally connected in a housing 1, a moving contact 5 pivotally connected to the large rotating shaft 2, a moving contact 5 mounted on the large rotating shaft through a contact spring 4, the large rotating shaft 2 driving the moving contact 5 to rotate and to contact and cooperate with a static contact 6 mounted in the housing 1, one end of the moving contact 5 being connected with a first limiting structure, the large rotating shaft 2 being mounted with a second limiting structure rotationally cooperating with the first limiting structure, during a short circuit, an electric repulsive force is generated between the moving contact 5 and the static contact 6 to drive the moving contact 5 to rotate relative to the large rotating shaft 2 and to be separated from the static contact 6, and the first limiting structure and the second limiting structure are limited to make the moving contact 5 in a static. The reversible moving contact assembly comprises a large rotating shaft, a moving contact and a contact spring, wherein the moving contact and the contact spring are installed on the large rotating shaft, a first limiting structure is arranged on the moving contact, a second limiting structure is arranged on the large rotating shaft, electric repulsion force is generated between a moving contact and a static contact under short-circuit current, the moving contact can be quickly repelled before a circuit breaker is disconnected, electric arcs are generated between the contacts, the short-circuit current passing through the circuit breaker can be limited, the moving contact cannot be automatically reset due to the limiting clamping stagnation of the first limiting structure and the second limiting structure after being overturned, and the moving contact can be reset only after the circuit breaker is disconnected or automatically tripped.
It should be noted that, in a normal closing state, the first limit structure and the second limit structure are not in limit fit, the large rotating shaft 2 is in a closing state due to the switching device in the moment of short circuit, the moving contact 5 rotates relative to the large rotating shaft 2, the first limit structure and the second limit structure are mutually limited, so that the moving contact is limited and static, and only after the switching device is opened or automatically tripped, the large rotating shaft 2 rotates and simultaneously triggers the moving contact to reset. The moving contact 5 and the contact spring 4 are arranged on the large rotating shaft 2 through a pivoting connecting shaft 7 and are fixed through a stop shaft 3 (a second limiting structure); when short circuit occurs, the electric repulsive force between the moving contact 5 and the static contact 6 enables the moving contact 5 to rotate around the pivot connecting shaft 7 and separate from the static contact 6. The circuit breaker trips and breaks off under the touch of the short-circuit protection release, and the large rotating shaft rotates around the pivot on the shell under the action of the mechanism spring to drive the moving contact 5 to be far away from the static contact 6. After the switching device is tripped, the moving contact 5 and the top of the shell 1 are limited and automatically reset. Obviously, a reset structure which is in limit reset with the movable contact 5 can also be arranged at the top of the shell.
As shown in fig. 3-10, a moving contact mounting cavity 21 for mounting each moving contact 5 is arranged on the large rotating shaft 2, the moving contacts 5 are pivotally mounted on the large rotating shaft 2 through a pivotal connecting shaft 7, the contact spring 4 is a torsion spring, the middle part of the contact spring 4 is sleeved on the pivotal connecting shaft 7, two ends of the contact spring 4 are pressed against and limited by the upper and lower ends of the moving contact mounting cavity 21 in a deformation manner, and a second limiting structure is pressed against and limited by one end of the contact spring 4; during installation, one end of the movable contact 5 is installed from one side of the movable contact installation cavity 21, the contact spring 4 is installed from the other side of the movable contact installation cavity 21, and the movable contact 5 and the contact spring 4 are installed on the large rotating shaft 2 through the pivoting connecting shaft 7 after being installed in the movable contact installation cavity 21. The moving contact 5 is arranged on the large rotating shaft 2 through a torsional spring, and is simple in structure, convenient and fast to assemble, stable and reliable in structure and suitable for mass production. The contact spring 4 provides elasticity when reseing and elasticity when the contact closes overtravel for the moving contact, and when there is short-circuit current, the moving contact 5 rotates along pivot connecting axle 7, and the spacing card stagnation of until first limit structure and second limit structure can't automatic re-setting. The present embodiment is a three-pole circuit breaker, which obviously can be a single-pole or other multi-pole circuit breaker.
As shown in fig. 3-4 and 8, two side walls of the movable contact mounting cavity 21 are provided with a pivot connecting hole 201 which is in mounting fit with the pivot connecting shaft 7, one end of the movable contact 5 is provided with a pivot mounting hole 501 which is in mounting fit with the pivot connecting shaft 7, and the pivot connecting shaft 7 passes through the pivot connecting hole 201, the pivot mounting hole 501 and the middle part of the contact spring 4 to mount the movable contact 5 and the contact spring 4 on the large rotating shaft 2. The pivot connecting shaft 7 is pivotally connected with the pivot connecting hole 201, the pivot mounting hole 501 and the middle part of the contact spring 4, and the structure is stable and reliable.
As shown in fig. 3-7, the first limiting structure of the reversible moving contact assembly of the present invention is an arc-shaped curved surface 511, the second limiting structure is a rotation stopping shaft 3 installed on the large rotating shaft 2, and the rotation stopping shaft 3 is abutted against one end of the contact spring 4 for limiting. The turnable moving contact component is in running fit with the rotary stopping shaft through the arc-shaped curved surface, the moving contact rotates more smoothly, the moving contact is quickly separated from the static contact to play a role in limiting current when short circuit occurs, in addition, one end of the contact spring is abutted to the rotary stopping shaft for limiting, and one end of the contact spring plays a role in fixing the rotary stopping shaft. Of course, the second limit structure may also be a limit protrusion or other structure disposed on the large rotating shaft 2.
As shown in fig. 3-7, in the present embodiment, a limiting protrusion 51 is protruded upward from one end of the movable contact 1, and an arc-shaped curved surface 511 is formed on one side of the limiting protrusion 51 facing the rotation-stopping shaft 3. In particular, it can also be a separate element connected to the movable contact, on which the arc-shaped curved surface 511 is provided to achieve the object of the present invention. The end of one end of the movable contact 5 is further provided with a connecting tail end 52, and the movable contact 5 is welded and flexibly connected or is in contact connection with other conductive members through the connecting tail end 52.
In this embodiment, the rotation-stopping shaft 3 is a separate component and is engaged with the arc-shaped curved surface 511, the rotation-stopping shaft 3 may be fixedly installed on the large rotation shaft 2 or may rotate along the large rotation shaft 2, and the rotation-stopping shaft 3 may also be an arc-shaped curved surface engaged with the arc-shaped curved surface 511 on the large rotation shaft 2.
As shown in fig. 6 and 7, the arc-shaped curved surface 511 is provided with a limit groove 5111 which is in limit fit with the rotation stop shaft 3. Obviously, the arc-shaped curved surface 511 may also be provided with a limiting protrusion. In addition, the arcuate curved surface 511 is an arc surface, or a conical surface, or a parabolic surface, or the like. The rotary stop shaft 3 is matched with the limiting groove or the limiting protrusion, so that the reliability of limiting clamping stagnation of the first limiting structure and the second limiting structure is improved. The difference between the embodiments of fig. 7 and 8 is that the stop groove 5111 of the latter is deeper.
As shown in fig. 9, the contact spring 4 is a double torsion spring, and the two torsion springs are connected by a torsion spring connection section 422; each torsion spring comprises a cylindrical spring body 41 and a cylindrical spring body 41, the cylindrical spring body 41 is arranged in the middle, the cylindrical spring body 41 is provided with a spring mounting hole 401 connected with the pivoting connecting shaft 7, the end of the first end arm 42 is provided with a bending contact section 421 in a bending mode, the bending contact section 421 abuts against the rotating locking shaft to be limited, the torsion spring connecting section 422 is connected with the ends of the two bending contact sections 421, and the moving contact 5 is installed between the two torsion springs. The invention adopts the arrangement of double torsion springs, the contact spring and the moving contact are reliably arranged on the large rotating shaft 2, the bending contact section 421 bends towards the rotary stop shaft 3 to be in contact fit with the rotary stop shaft 3, and the rotary stop shaft 3 is reliably limited.
As shown in fig. 3 and 8, shaft mounting grooves 203 which are matched with two ends of the rotation stopping shaft 3 are concavely arranged on the upper portions of two opposite side walls of the movable contact mounting cavity 21 of the large rotating shaft 2, the rotation stopping shaft 3 is mounted on the large rotating shaft 2 in a limiting manner by one end of the contact spring 4, and a cross arm 204 for increasing the strength of the rotating shaft is arranged on the upper portion of the movable contact mounting cavity 21. The two opposite side walls of the moving contact mounting cavity 21 are recessed to form spring body mounting grooves 202 for mounting the cylindrical spring body 41 of the double torsion spring. The shaft mounting grooves 203 are matched with the two ends of the rotation stop shaft 3 in a mounting manner, the spring body mounting grooves 202 on the two sides are used for mounting the cylindrical spring bodies 41 of the contact springs 4, and the whole mounting structure is stable and reliable. The cross arm 204 increases the strength of the entire large spindle.
As shown in fig. 10, the pivot connection shaft 7 is cylindrical, and includes a movable contact pivot shaft 71 whose middle portion is in mounting fit with the movable contact 5, and spring installation shafts 72 at two ends of the movable contact pivot shaft 71 and in mounting fit with spring installation holes 401 of two cylindrical spring bodies 41, and a diameter of each spring installation shaft 72 is greater than a diameter of the movable contact pivot shaft 71. The diameter of the spring mounting shaft 72 is larger than that of the movable contact pivot shaft 71, after the movable contact and the contact pivot shaft are assembled, in the operation process of the circuit breaker, the movable contact is clamped and limited by the spring mounting shaft 72 with the larger diameters of the two ends and is not easy to separate, and the structure is stable and reliable.
The working process of the reversible moving contact assembly of the invention is described with reference to fig. 1-2:
when the switching of the switching device is switched between normal switching on and switching off, the handle drives the large rotating shaft 2 to rotate, the moving contact 5 arranged on the large rotating shaft 2 is contacted and matched with the static contact 6 along with the rotation, and the moving contact 5 is arranged on the large rotating shaft 2 through the contact spring 4 to realize overtravel. As shown in fig. 1, in a distribution line of a product under normal conditions, current flows between a static contact 6 and a movable contact 5 according to a direction indicated by an open arrow, and an electric repulsive force in a direction of a solid arrow is generated between the static contact and the movable contact. Because the electric repulsion force is far smaller than the contact pressure between the moving contact and the fixed contact of the circuit breaker, the moving contact and the fixed contact still keep in a closed connection state.
As shown in fig. 2, at the moment of short circuit, due to the sudden increase of short circuit current, the electric repulsion between the moving contact and the static contact is far larger than the contact pressure between the moving contact and the static contact, the moving contact is instantly repelled (rotates clockwise around the moving contact shaft), the acting force of the contact spring 4 is overcome to rotate around the moving contact shaft relative to the large rotating shaft 2, at this time, the large rotating shaft 2 does not understand or rotates slower than the moving contact, until the arc-shaped curved surface 511 crosses the limit position of the rotating stop shaft 3, and the moving contact 5 resets under the action of the contact spring after stopping rotating, but cannot reset to the original installation position on the large rotating shaft 2 due to the limit matching of the arc-shaped curved surface 511 and the stop shaft 3. When short circuit occurs, electric arc is generated between the moving contact and the static contact, and the electric arc has a certain resistance and plays a role in limiting short-circuit current in a circuit, so that the short-circuit current between the moving contact and the static contact is smaller than the expected short-circuit current, and the purpose of limiting current is achieved. And after the circuit breaker is disconnected or automatically tripped, the moving contact is driven to reset.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (13)
1. A reversible moving contact assembly pivotally mounted in a housing (1), characterized in that: the turnover moving contact component comprises a large rotating shaft (2) which is pivotally connected in a shell (1), a moving contact (5) which is pivotally connected on the large rotating shaft (2) and is mounted on the large rotating shaft (2) through a contact spring (4), the large rotating shaft (2) drives the moving contact (5) to rotate and is in contact fit with a static contact (6) mounted in the shell (1), one end of the moving contact (5) is connected with a first limiting structure, a second limiting structure which is in rotation fit with the first limiting structure is arranged on the large rotating shaft (2), the normal closing state is realized, the first limiting structure and the second limiting structure are not in limiting fit, during short circuit, electric repulsion force is generated between the moving contact (5) and the static contact (6) to drive the moving contact (5) to rotate and separate from the static contact (6) relative to the large rotating shaft (2), and the first limiting structure of the moving contact (5) and the second limiting structure on the large rotating shaft (2) are in limiting fit to And resetting.
2. The reversible movable contact assembly of claim 1, wherein: the automatic reset device is characterized in that a moving contact mounting cavity (21) for mounting a moving contact (5) is formed in the large rotating shaft (2), the moving contact (5) is pivotally mounted on the large rotating shaft (2) through a pivoting connecting shaft (7), the middle of a contact spring (4) is sleeved on the pivoting connecting shaft (7), the moving contact (5) and the contact spring (4) are mounted on the large rotating shaft (2) through the pivoting connecting shaft (7) after being mounted in the moving contact mounting cavity (21), and after an electrical appliance is tripped, the moving contact (5) is in contact with the top of the shell (1) for limiting and automatic reset.
3. The reversible movable contact assembly of claim 2, wherein: the lateral walls of two sides of the moving contact mounting cavity (21) are provided with pivoting connecting holes (201) which are matched with the pivoting connecting shaft (7) in a mounting way, one end of the moving contact (5) is provided with a pivoting mounting hole (501) which is matched with the pivoting connecting shaft (7) in a mounting way, and the pivoting connecting shaft (7) penetrates through the middle parts of the pivoting connecting holes (201), the pivoting mounting holes (501) and the contact spring (4) to mount the moving contact (5) and the contact spring (4) on the large rotating shaft (2); the two ends of the contact spring (4) are abutted against the moving contact mounting cavity (21) for limiting, and the second limiting structure is abutted against one end of the contact spring (4) for limiting.
4. The reversible movable contact assembly of any one of claims 1-3, wherein: the first limiting structure is an arc-shaped curved surface (511), the second limiting structure is a rotary stopping shaft (3) arranged on the large rotating shaft (2), and the rotary stopping shaft (3) is abutted against one end of the contact spring (4) for limiting.
5. The reversible movable contact assembly of claim 4, wherein: one end of the moving contact (5) is provided with a limiting protrusion (51) in an upward protruding mode, and one side, facing the rotary stop shaft (3), of the limiting protrusion (51) forms an arc-shaped curved surface (511).
6. The reversible movable contact assembly of claim 4, wherein: the arc-shaped curved surface (511) is provided with a limiting protrusion or a limiting groove (5111) which is in limiting fit with the rotary stop shaft (3).
7. The reversible movable contact assembly of claim 4, wherein: the arc-shaped curved surface (511) is an arc surface, or a conical curved surface, or a parabolic curved surface.
8. The reversible movable contact assembly of claim 2, wherein: the contact spring (4) is a double torsion spring, and the two torsion springs are connected through a torsion spring connecting section (422); every torsional spring includes cylindrical spring body (41) of the column at middle part, and first end arm (42) and second end arm (43) that cylindrical spring body (41) extend to both ends, cylindrical spring body (41) are equipped with spring mounting hole (401) with pivotal connection axle (7), the tip of first end arm (42) is buckled and is equipped with contact segment (421) of buckling, torsional spring connection segment (422) are connected the tip of two contact segments (421) of buckling, moving contact (5) are installed between two torsional springs.
9. The reversible movable contact assembly of claim 8, wherein: the pivoting connecting shaft (7) is cylindrical and comprises a moving contact pivot shaft (71) and spring mounting shafts (72), wherein the middle part of the moving contact pivot shaft (71) is in mounting fit with the moving contact (5), the spring mounting shafts (72) are arranged at two ends of the moving contact pivot shaft (71) and are in mounting fit with spring mounting holes (401) of the two cylindrical spring bodies (41), and the diameter of each spring mounting shaft (72) is larger than that of each moving contact pivot shaft (71).
10. The reversible movable contact assembly of claim 8, wherein: and spring body mounting grooves (202) for mounting cylindrical spring bodies (41) of double torsion springs are concavely arranged on two opposite side walls of the moving contact mounting cavity (21).
11. The reversible movable contact assembly of claim 4, wherein: the upper portions of two opposite side walls of a moving contact mounting cavity (21) of the large rotating shaft (2) are concavely provided with shaft mounting grooves (203) which are matched with two ends of the rotary stopping shaft (3) in a mounting mode, one end of a contact spring (4) is used for limiting and mounting the rotary stopping shaft (3) on the large rotating shaft (2), and the upper portion of the moving contact mounting cavity (21) is provided with a cross arm (204) used for increasing the strength of the rotating shaft.
12. A switching apparatus, characterized in that: the reversible moving contact assembly of any one of claims 1 to 11, further comprising a housing, wherein the reversible moving contact assembly is installed in the middle of the housing, an operating system (9) is arranged above the reversible moving contact assembly and is in contact fit with the reversible moving contact assembly, and a handle (8) linked with the operating system (9) is arranged on the top of the housing.
13. The switching device according to claim 12, characterized in that: when short circuit occurs, the short circuit protection release is triggered to release and break, and after the switch electrical appliance is released, the movable contact (5) of the turnable movable contact component and the top of the shell are limited and automatically reset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711075353.8A CN107808806B (en) | 2017-11-03 | 2017-11-03 | Turnable movable contact component and switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711075353.8A CN107808806B (en) | 2017-11-03 | 2017-11-03 | Turnable movable contact component and switching device |
Publications (2)
| Publication Number | Publication Date |
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| CN107808806A CN107808806A (en) | 2018-03-16 |
| CN107808806B true CN107808806B (en) | 2020-04-17 |
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| CN201711075353.8A Active CN107808806B (en) | 2017-11-03 | 2017-11-03 | Turnable movable contact component and switching device |
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| CN (1) | CN107808806B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5008504A (en) * | 1989-01-06 | 1991-04-16 | Fuji Electric Co., Ltd. | Switching mechanism in circuit breaker |
| CN102938354A (en) * | 2012-11-15 | 2013-02-20 | 西安交通大学 | Contact and arc extinction system of mold case circuit breaker |
| CN103531409A (en) * | 2013-10-31 | 2014-01-22 | 德力西电气有限公司 | Contact system of circuit breaker |
| CN204348657U (en) * | 2014-12-10 | 2015-05-20 | 浙江正泰电器股份有限公司 | The contact apparatus with turning fixed contact of circuit breaker and circuit breaker |
| CN207587673U (en) * | 2017-11-03 | 2018-07-06 | 浙江正泰电器股份有限公司 | Moving contact component and device for switching may be reversed |
-
2017
- 2017-11-03 CN CN201711075353.8A patent/CN107808806B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5008504A (en) * | 1989-01-06 | 1991-04-16 | Fuji Electric Co., Ltd. | Switching mechanism in circuit breaker |
| CN102938354A (en) * | 2012-11-15 | 2013-02-20 | 西安交通大学 | Contact and arc extinction system of mold case circuit breaker |
| CN103531409A (en) * | 2013-10-31 | 2014-01-22 | 德力西电气有限公司 | Contact system of circuit breaker |
| CN204348657U (en) * | 2014-12-10 | 2015-05-20 | 浙江正泰电器股份有限公司 | The contact apparatus with turning fixed contact of circuit breaker and circuit breaker |
| CN207587673U (en) * | 2017-11-03 | 2018-07-06 | 浙江正泰电器股份有限公司 | Moving contact component and device for switching may be reversed |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107808806A (en) | 2018-03-16 |
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Application publication date: 20180316 Assignee: Wenzhou Zhengtai Electrical Technology Co., Ltd Assignor: Zhejiang Chint Electrics Co.,Ltd. Contract record no.: X2020330000078 Denomination of invention: Turn over contact assembly and switch apparatus Granted publication date: 20200417 License type: Common License Record date: 20201021 |