CN217086506U - Overload protection mechanism of plug-in circuit breaker - Google Patents
Overload protection mechanism of plug-in circuit breaker Download PDFInfo
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- CN217086506U CN217086506U CN202220391046.0U CN202220391046U CN217086506U CN 217086506 U CN217086506 U CN 217086506U CN 202220391046 U CN202220391046 U CN 202220391046U CN 217086506 U CN217086506 U CN 217086506U
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- support
- circuit breaker
- bracket
- bimetallic strip
- overload protection
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Abstract
The utility model relates to the technical field of circuit breakers, in particular to an overload protection mechanism of a plug-in circuit breaker, which comprises a bimetallic strip and a bracket, wherein the bimetallic strip and the bracket are arranged in a shell of the circuit breaker, and is characterized in that the bracket comprises an adjusting bracket, a supporting bracket, a fixed bracket and an arc-leading part which are connected in sequence, the adjusting bracket, the supporting bracket and the fixed bracket are arranged in a stacking way, the adjusting bracket is positioned above the supporting bracket, the supporting bracket is positioned above the fixed bracket, one end of the adjusting bracket is connected with the supporting bracket, the other end of the adjusting bracket is provided with a bimetallic strip welding surface, the bimetallic strip welding surface is connected with the bimetallic strip, the other end of the bimetallic strip is used for connecting an operating mechanism of the circuit breaker, the other end of the supporting bracket extends to the middle part of the fixed bracket and extends downwards respectively and is connected with the middle part of the fixed bracket to form the arc-leading part, the mechanism enlarges the gap between the bimetallic strip and the shell, raises the bimetallic strip, facilitates wiring and avoids mutual influence with the support.
Description
Technical Field
The utility model relates to a circuit breaker technical field especially relates to an overload protection mechanism of bayonet circuit breaker.
Background
An overload protection mechanism is generally provided in a circuit breaker. The overload protection mechanism generally comprises a bimetallic strip, an adjusting screw, a connecting sheet and a bimetallic support, when a load current passes through the overload protection mechanism for a certain time, the bimetallic strip is heated and bent and drives a pull rod matched with a lock catch, so that the pull rod drives the lock catch to move, the balance of the mechanism is damaged, the mechanism is pulled back under the action of a spring, and at the moment, a moving contact is also separated from a static contact, so that the circuit is protected. When the overload protection mechanism works, the bimetallic strip is required to drive the trip rod to move, and the trip rod simultaneously needs to move to ensure that the operating mechanism is driven to work, so that the overload protection is realized.
Chinese utility model with publication number CN212010878U discloses a circuit breaker overload protection mechanism, for a typical current plug-in circuit breaker overload protection mechanism, but among the plug-in circuit breaker, the height and the width space of casing are limited, the deformation space that leads to the bimetallic strip receives very big restriction, this structure occupation space is great, the stability of tripping when having influenced the circuit breaker and transshipping, and this structure need imbed the nut in the casing, the structure is more complicated, the process is more loaded down with trivial details, consequently, need the overload protection mechanism of a simpler plug-in circuit breaker of structure to solve this problem urgently.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an overload protection mechanism of plug-in circuit breaker to solve the description problem in the above-mentioned background art.
The method specifically comprises the following steps: the utility model provides an overload protection mechanism of bayonet circuit breaker, including the bimetallic strip, a support, bimetallic strip and support mounting are in the casing of circuit breaker, the support is including the regulation support that connects gradually, the support frame, fixed bolster and arc-striking portion, adjust the support, the support frame, the range upon range of fixed bolster, it is located the top of support frame to adjust the support, the support frame is located the top of fixed bolster, the one end joint support frame of adjusting the support, the other end is equipped with the bimetallic strip face of weld, the bimetallic strip is connected to the bimetallic strip face of weld, the bimetallic strip other end is used for connecting the operating device of circuit breaker, the support frame other end extends to between and forms arc-striking portion with the fixed bolster middle part downwardly extending respectively and connect.
Preferably, the bimetal is located above the support.
Preferably, the adjusting bracket is provided with a screw hole, the screw hole is provided with an adjusting bolt, and the bottom end of the adjusting bolt is propped against the supporting bracket.
Preferably, the fixing support is arranged in a wide surface mode, two sides of the fixing support are abutted to the shell 3 to be fixed, the adjusting support and the supporting support are arranged in a narrow surface strip mode, and one side of the adjusting support and the side of the supporting support are parallel and level.
Preferably, the bimetallic strip welding surface is arranged on the side surface of the adjusting bracket, and the surface of the bimetallic strip welding surface is provided with welding spots.
Preferably, the adjusting bracket is connected with the supporting bracket in a circular arc manner.
Preferably, be equipped with the mounting panel on the casing and carry out spacing fixed to the support, the mounting panel includes first mounting panel, second mounting panel and third mounting panel, is located the top of the explosion chamber of circuit breaker, forms the clearance between the top of first mounting panel and explosion chamber, and fixed support inserts and fixes in the clearance, and the second mounting panel sets up in striking portion left side, and the third mounting panel sets up between regulation support and support connection department.
Preferably, the shell is further provided with a sealing cover, and the sealing cover is arranged right above the adjusting bolt and used for preventing a person from randomly screwing the adjusting bolt to cause product protection failure.
Preferably, the joints of the adjusting bracket, the supporting bracket, the fixing bracket and the arc striking part are all in smooth transition.
Preferably, the support is connected to the inlet terminals of the circuit breaker by wires.
Advantageous effects
1. The product has simple process, convenient and quick installation and high production efficiency;
2. the welding surface of the bimetallic strip is extended from the support and used for welding the bimetallic strip, so that the gap between the bimetallic strip and the shell is enlarged, the bimetallic strip is lifted, the bimetallic strip is positioned above the support, the wiring is convenient, and the bimetallic strip is prevented from being influenced with the support;
3. the support is provided with a resettable circular arc, the nut of the adjusting screw is cancelled, the double-metal support is tapped, restoring force after the screw is unscrewed is provided by the circular arc of the support, the double metal sheets are convenient to adjust, the double metal sheets can be restored to the initial position, and meanwhile, the assembling efficiency is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an exploded view of the overall structure of the present invention;
FIG. 3 is a rear view of the overall structure of the present invention;
FIG. 4 is a schematic view of the bracket structure of the present invention;
FIG. 5 is a schematic view of the assembly structure of the present invention;
in fig. 1-5, the correspondence between the component names and the reference numbers is:
the device comprises a bimetallic strip-1, a support-2, an adjusting support-201, a bimetallic strip welding surface-2011, a screw hole-2012, a welding point-2013, a supporting support-202, a fixing support-203, an arc striking part-204, an adjusting bolt-205, a shell-3, a first mounting plate-301, a second mounting plate-302, a third mounting plate-303, a sealing cover-304, a wire inlet terminal-4, a pull rod-5 and an arc extinguishing chamber-6.
Detailed Description
The technical solution in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.
Furthermore, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship illustrated in the drawings, and are used for convenience in describing the present invention, but do not indicate or imply that the device or element so referred to must have this particular orientation, be operated in a particular orientation, and are not to be construed as limiting the present invention.
As shown in figures 1 to 5:
the embodiment provides an overload protection mechanism of a plug-in circuit breaker, which comprises a bimetallic strip 1 and a bracket 2, wherein the bimetallic strip 1 and the bracket 2 are arranged in a shell 3 of the circuit breaker, the circuit breaker adjusting support is characterized in that the support 2 comprises an adjusting support 201, a supporting support 202, a fixing support 203 and an arc striking portion 204 which are sequentially connected, the adjusting support 201, the supporting support 202, the fixing support 203 is arranged in an up-and-down parallel stacking mode, the adjusting support 201 is located above the supporting support 202, the supporting support 202 is located above the fixing support 203, one end of the adjusting support 201 is connected with the supporting support 202, the other end of the adjusting support 201 is provided with a bimetallic strip welding surface 2011, the bimetallic strip welding surface 2011 is connected with a bimetallic strip 1, the other end of the bimetallic strip 1 is used for being connected with an operating mechanism 5 of the circuit breaker, and the other end of the supporting support 202 extends to the middle of the fixing support 203 and extends downwards and is connected to form the arc striking portion 204.
Wherein the bimetal is located above the bracket 2.
Wherein, screw 2012 has been seted up on adjusting bracket 201, installs adjusting bolt 205 on screw 2012, and support bracket 202 is withstood to its bottom, still is provided with closing cap 304 on casing 3, and this closing cap 304 is installed directly over adjusting bolt 205 for prevent that personnel from twisting adjusting screw at will, lead to the product protection inefficacy, when needing to adjust bimetallic strip 1 position, take off closing cap 304 can, twist adjusting screw with the instrument.
Optionally, a nut is embedded in the upper housing 3 of the adjusting bracket 201, the adjusting bolt 205 is installed, and the bottom end of the adjusting bolt 205 abuts against the adjusting bracket 201, which can also adjust the position of the bimetal 1.
The fixing support 203 is arranged in a wide surface mode, two sides of the fixing support are abutted to the shell 3 to be fixed, the adjusting support 201 and the supporting support 202 are arranged in a narrow surface strip mode, one side of the adjusting support is flush with the side edge of the fixing support 203, the moving space of the bimetallic strip 1 is avoided, and interference is avoided.
The bimetallic strip welding face 2011 is arranged on the side face of the adjusting support 201, and the surface of the bimetallic strip welding face 2011 is provided with a welding spot 2013 for welding the bimetallic strip 1.
The adjusting support 201 is connected with the support 202 in an arc mode, restoring force after the screw is unscrewed is provided by the aid of the arc of the support, the bimetallic strip can be conveniently adjusted to return to the initial position, and meanwhile assembly efficiency is improved.
Wherein, it carries out spacing fixed to support 2 to be equipped with the mounting panel on casing 3, the mounting panel includes first mounting panel 301, second mounting panel 302 and third mounting panel 303, be located the top of the explosion chamber 6 of circuit breaker, form the clearance between the top of first mounting panel 301 and explosion chamber 4, fixed bolster 203 inserts and fixes in the clearance, second mounting panel 302 sets up in leading arc portion 204 left side, third mounting panel 303 sets up between regulation support 201 and support holder 202 junction, third mounting panel 303 is the setting of circular arc type, second mounting panel 302 matches the arc setting of leading arc portion 204.
Wherein, the joints of the adjusting bracket 201, the supporting bracket 202, the fixing bracket 203 and the arc striking part 204 are all in smooth transition.
The support 2 is connected with an incoming line terminal 4 of the circuit breaker through a wire, and the bimetallic strip 1 is connected with a moving contact of the circuit breaker through a wire.
The working principle is as follows: after a current is carried for a certain time, the bimetallic strip 1 is heated and bent upwards and drives the pull rod 5 matched with the lock catch, so that the bimetallic strip drives the lock catch to move, the balance of the mechanism is damaged, the mechanism is pulled back under the action of the spring, and the moving contact is separated from the static contact, so that the circuit is protected.
Claims (10)
1. The utility model provides an overload protection mechanism of bayonet circuit breaker, includes bimetallic strip, support, bimetallic strip and support mounting in the casing of circuit breaker, its characterized in that: the support including the regulation support that connects gradually, support holder, fixed bolster and arc portion of drawing, adjust support holder, the range upon range of fixed bolster, the regulation support be located the top of support holder, the support holder is located the top of fixed bolster, the one end connection support of regulation support, the other end is equipped with bimetallic strip weld face, bimetallic strip is connected to the bimetallic strip weld face, the bimetallic strip other end is used for connecting the operating device of circuit breaker, the support holder other end extends to between and forms arc portion of drawing with fixed bolster middle part downwardly extending respectively and connect.
2. Overload protection mechanism for a plug-in circuit breaker according to claim 1, characterized in that: the bimetallic strip is positioned above the bracket.
3. Overload protection mechanism for a plug-in circuit breaker according to claim 1, characterized in that: the adjusting bracket is provided with a screw hole, the screw hole is provided with an adjusting bolt, and the bottom end of the adjusting bolt is propped against the supporting bracket.
4. Overload protection mechanism for a plug-in circuit breaker according to claim 3, characterized in that: the shell is also provided with a sealing cover, and the sealing cover is arranged right above the adjusting bolt.
5. Overload protection mechanism for a plug-in circuit breaker according to claim 1, characterized in that: the adjusting support and the supporting support are in narrow-surface strip type arrangement, and one side of the adjusting support and one side of the supporting support are parallel and level to the side of the fixing support.
6. Overload protection mechanism for a plug-in circuit breaker according to claim 1, characterized in that: the bimetallic strip welding face is arranged on the side face of the adjusting support, and welding spots are arranged on the surface of the bimetallic strip welding face.
7. Overload protection mechanism for a plug-in circuit breaker according to claim 1, characterized in that the adjustment bracket is arc-connected with the support bracket.
8. Overload protection mechanism for a plug-in circuit breaker according to claim 1, characterized in that: the casing on be equipped with the mounting panel and carry out spacing fixed to the support, the mounting panel includes first mounting panel, second mounting panel and third mounting panel, is located the top of the explosion chamber of circuit breaker, forms the clearance between the top of first mounting panel and explosion chamber, the fixed bolster insert and fix in the clearance, the second mounting panel sets up in striking portion left side, the third mounting panel sets up between regulation support and support connection department.
9. Overload protection mechanism for a plug-in circuit breaker according to claim 1, characterized in that: and the joints of the adjusting bracket, the supporting bracket, the fixing bracket and the arc striking part are all in smooth transition.
10. The overload protection mechanism for a plug-in circuit breaker according to claim 1, wherein the bracket is connected to the line inlet of the circuit breaker by a wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220391046.0U CN217086506U (en) | 2022-02-25 | 2022-02-25 | Overload protection mechanism of plug-in circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220391046.0U CN217086506U (en) | 2022-02-25 | 2022-02-25 | Overload protection mechanism of plug-in circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217086506U true CN217086506U (en) | 2022-07-29 |
Family
ID=82543654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220391046.0U Active CN217086506U (en) | 2022-02-25 | 2022-02-25 | Overload protection mechanism of plug-in circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217086506U (en) |
-
2022
- 2022-02-25 CN CN202220391046.0U patent/CN217086506U/en active Active
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