Tripping support for molded case circuit breaker

Abstract

The utility model discloses a tripping bracket for a molded case circuit breaker, which belongs to the technical field of circuit breakers, aims at solving the problem that the size of the tripping bracket cannot be adjusted according to mounting grooves of molded case circuit breakers with different sizes, and comprises two fixing plates, a first telescopic mechanism and a second telescopic mechanism, the first telescopic mechanisms are symmetrically arranged below the fixing plates, the second telescopic mechanism is arranged between the two fixing plates, the telescopic plates are fixedly connected to the upper portion of the mounting bottom plate, and mounting grooves are formed in the bottom faces of the fixing plates; according to the utility model, through the arrangement of the first telescoping mechanism and the second telescoping mechanism, not only can the height of the mounting bottom plate be adjusted, but also the length of the fixing shaft can be adjusted, so that the overall height and the overall width of the tripping support can be adjusted to adapt to molded case circuit breaker mounting grooves of different specifications and dimensions; and the application range and the practicability of the tripping bracket are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, and in particular relates to a trip bracket for a molded case circuit breaker. Background Art

[0002] Circuit breakers are widely used products as overload, short circuit and undervoltage protection devices in low-voltage power distribution systems and motor protection circuits. The structure of a circuit breaker generally consists of a contact system, an arc extinguishing device, an operating mechanism, a tripping device, a plastic casing and optional accessories. The contact system includes moving and static contacts connected in pairs in the line. When the line where the circuit breaker is located has an overload, short circuit, undervoltage or other faults, the moving and static contacts are opened within a specified time to cut off the line and protect the line and power supply equipment from damage; the arc extinguishing device is used to extinguish the arc generated when the moving and static contacts are opened; the tripping device includes a thermal tripping device, an electromagnetic tripping mechanism, and an undervoltage tripping mechanism; when a short circuit occurs in the line, the short-circuit current flows through the tripping device, the magnetic tripping mechanism is activated, the operating mechanism is tripped, and the circuit breaker trips, thereby protecting the line and load where the circuit breaker is located.

[0003] The prior art discloses a release bracket for a molded case circuit breaker with a patent announcement number of CN219418920U. The above patent provides a compression spring and a card plate, and the compression spring in a compressed state always contacts the inner wall of the card plate, so that the outer side of the card plate contacts the inner wall of the mounting groove, thereby avoiding loosening of the release bracket during transportation of the molded case circuit breaker or when it is installed inside the mounting groove of the molded case circuit breaker, thereby improving the installation stability of the release bracket. However, the following deficiencies still exist in actual use: from a practical point of view, the provided release bracket is usually made of one-piece molding, but in the specific use process, the size of the release bracket cannot be adjusted according to the mounting grooves of molded case circuit breakers of different sizes to meet the demand of a release bracket adapting to mounting grooves of different molded case circuit breakers.

[0004] Therefore, a trip bracket for a molded case circuit breaker is needed to solve the problem in the prior art that the size of the trip bracket cannot be adjusted according to the installation slots of molded case circuit breakers of different sizes. Utility Model Content

[0005] The purpose of the utility model is to provide a trip bracket for a molded case circuit breaker to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a trip bracket for a molded case circuit breaker, comprising a fixed plate, a first telescopic mechanism and a second telescopic mechanism, there are two fixed plates, the first telescopic mechanism is symmetrically arranged below the fixed plate, and the second telescopic mechanism is arranged between the two fixed plates.

[0007] The first telescopic mechanism consists of a mounting base plate, a telescopic plate, a spring piece, an anti-slip section and a positioning section. The telescopic plate is fixedly connected to the top of the mounting base plate. A mounting groove is provided on the bottom surface of the fixed plate. The spring piece is fixedly connected to one side of the telescopic plate close to the positioning groove.

[0008] It should be noted in the solution that the anti-slip section is arranged on a side of the spring sheet away from the telescopic plate, and the positioning section is fixedly connected to the top end of the spring sheet.

[0009] It is further worth noting that a positioning through slot is provided on one side of the installation slot, and the positioning section is adapted to the size of the positioning through slot.

[0010] It should be further explained that the second telescopic mechanism is composed of a fixed shaft, a connecting shaft, a limit bar, a fixed block, a rotating shaft, a rotating block, a positioning column and a spring. There are two fixed shafts, which are arranged on the left and right and are respectively fixedly connected to one side of the fixed plate. The connecting shaft is fixedly connected to the left end of the right fixed shaft, the limit bar is fixedly connected to the bottom surface of the connecting shaft, and one end of the left fixed shaft is provided with a connecting groove that is compatible with the connecting shaft.

[0011] As a preferred implementation, a limiting groove is provided on the bottom surface of the connecting groove, and the limiting strip is adapted to the size of the limiting groove.

[0012] As a preferred embodiment, the fixed block is symmetrically fixedly connected above the right fixed shaft, the rotating shaft is fixedly connected between the two fixed blocks, the rotating block is rotatably connected to the outside of the rotating shaft, and the positioning column is fixedly connected to the bottom surface of the left end of the rotating block.

[0013] As a preferred embodiment, a positioning groove is formed on the top surface of the connecting shaft, and the size of the positioning column is matched with the positioning groove, and the spring is fixedly connected between the bottom surface of the right end of the rotating block and the outer wall of the right fixed shaft.

[0014] Compared with the prior art, the trip bracket for a molded case circuit breaker provided by the utility model has at least the following beneficial effects:

[0015] The utility model can adjust the height of the mounting base plate and the length of the fixed shaft by setting up the first telescopic mechanism and the second telescopic mechanism, so that the overall height and the overall width of the trip bracket can be adjusted to adapt to the mounting slots of molded case circuit breakers of different specifications and sizes, thereby improving the scope of application and practicality of the trip bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2It is a schematic cross-sectional structure diagram of the first telescopic mechanism of the utility model;

[0018] Figure 3 It is a schematic cross-sectional structure diagram of the second telescopic mechanism of the utility model;

[0019] Figure 4 It is a schematic diagram of the structure of the second telescopic mechanism of the utility model.

[0020] In the figure: 1, fixed plate; 2, first telescopic mechanism; 3, second telescopic mechanism; 201, mounting base plate; 202, telescopic plate; 203, mounting slot; 204, positioning slot; 205, spring piece; 206, anti-slip section; 207, positioning section; 301, fixed shaft; 302, connecting shaft; 303, limiting strip; 304, connecting slot; 305, limiting slot; 306, positioning slot; 307, fixed block; 308, rotating shaft; 309, rotating block; 310, positioning column; 311, spring. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the embodiments.

[0022] See also Figure 1-4 The utility model provides a tripping bracket for a molded case circuit breaker, comprising a fixed plate 1, a first telescopic mechanism 2 and a second telescopic mechanism 3. There are two fixed plates 1, the first telescopic mechanism 2 is symmetrically arranged below the fixed plate 1, and the second telescopic mechanism 3 is arranged between the two fixed plates 1.

[0023] The first telescopic mechanism 2 is composed of a mounting base plate 201, a telescopic plate 202, a spring piece 205, an anti-slip section 206 and a positioning section 207. The telescopic plate 202 is fixedly connected to the top of the mounting base plate 201. A mounting groove 203 is provided on the bottom surface of the fixed plate 1. The spring piece 205 is fixedly connected to one side of the telescopic plate 202 close to the positioning groove 204.

[0024] Further as Figure 1 and Figure 2 As shown, it is worth to explain in detail that the anti-slip section 206 is arranged on the side of the spring piece 205 away from the telescopic plate 202, and the positioning section 207 is fixedly connected to the top of the spring piece 205;

[0025] The anti-slip section 206 can increase the friction between the spring piece 205 and the inner wall of the installation groove 203, thereby preventing the spring piece 205 from sliding or falling off during use.

[0026] Further as Figure 1 and Figure 2 As shown, it is worth to explain in detail that a positioning slot 204 is opened on one side of the installation slot 203, and the positioning section 207 is adapted to the size of the positioning slot 204;

[0027] The extended length of the telescopic plate 202 can be adjusted by inserting the positioning section 207 into the positioning slots 204 of different heights.

[0028] Further as Figure 1 , Figure 3 and Figure 4 As shown, it is worth specifically explaining that the second telescopic mechanism 3 is composed of a fixed shaft 301, a connecting shaft 302, a limiting bar 303, a fixed block 307, a rotating shaft 308, a rotating block 309, a positioning column 310 and a spring 311. There are two fixed shafts 301, which are arranged on the left and right sides and are respectively fixedly connected to one side of the fixed plate 1. The connecting shaft 302 is fixedly connected to the left end of the right fixed shaft 301, and the limiting bar 303 is fixedly connected to the bottom surface of the connecting shaft 302. A connecting groove 304 adapted to the connecting shaft 302 is provided at one end of the left fixed shaft 301, and a limiting groove 305 is provided on the bottom surface of the connecting groove 304, and the limiting bar 303 is adapted to the size of the limiting groove 305.

[0029] The limiting strip 303 is provided to slide inside the limiting groove 305 , thereby driving the fixed shaft 301 to move inside the connecting groove 304 , thereby improving the telescopic stability of the connecting shaft 302 .

[0030] Further as Figure 1 , Figure 3 and Figure 4 As shown, it is worth specifically explaining that the fixed block 307 is symmetrically fixedly connected to the top of the right fixed shaft 301, the rotating shaft 308 is fixedly connected between the two fixed blocks 307, the rotating block 309 is rotatably connected to the outside of the rotating shaft 308, the positioning column 310 is fixedly connected to the left end bottom surface of the rotating block 309, the top surface of the connecting shaft 302 is provided with a positioning groove 306, and the size of the positioning column 310 is adapted to the positioning groove 306, and the spring 311 is fixedly connected between the right end bottom surface of the rotating block 309 and the outer wall of the right fixed shaft 301;

[0031] The elastic action of the spring 311 drives the rotating block 309 to reset, so that the positioning column 310 is inserted into the interior of the positioning groove 306, and the two fixed shafts 301 are fixedly connected, thereby improving the practicability of the mechanism.

[0032] The present solution has the following working process: when in use, according to the size of the mounting slot of the molded case circuit breaker, first adjust the height of the mounting base plate 201, press the positioning section 207 to retract it into the interior of the mounting slot 203, then pull the mounting base plate 201, and drive the spring piece 205 to move inside the mounting slot 203 through the telescopic plate 202 until the mounting base plate 201 moves to the required height, and through the elastic action of the spring piece 205, the positioning section 207 is clamped into the interior of the positioning slot 204, and the position of the mounting base plate 201 is fixed to adapt to the height of the mounting slot of the molded case circuit breaker; then press the right end of the rotating block 309, and drive the rotating block through the rotating shaft 308 309 rotates, so that the left end of the rotating block 309 moves upward, driving the positioning column 310 to disengage from the interior of the positioning groove 306, and then pushing and pulling the fixed shaft 301 on one side, driving the connecting shaft 302 to move stably inside the connecting groove 304 through the limit bar 303 until the two fixed shafts 301 move to the required length, and then releasing the spring 311, and driving the rotating block 309 to reset under the elastic action of the spring 311, so that the positioning column 310 is inserted into the interior of the positioning groove 306, fixing the connection between the two fixed shafts 301, so as to adjust the spacing between the two fixed plates 1, adapt to the installation grooves of molded case circuit breakers of different widths, and improve the application range of the trip bracket.

[0033] In summary: the utility model can adjust the height of the mounting base plate 201 and the length of the fixed axis 301 by setting the first telescopic mechanism 2 and the second telescopic mechanism 3, so that the overall height and the overall width of the trip bracket can be adjusted to adapt to the mounting slots of molded case circuit breakers of different specifications and sizes, thereby improving the scope of application and practicality of the trip bracket.

Claims

1. A trip bracket for a molded case circuit breaker, comprising a fixing plate (1), a first telescopic mechanism (2) and a second telescopic mechanism (3), characterized in that: There are two fixed plates (1), the first telescopic mechanism (2) is symmetrically arranged below the fixed plates (1), and the second telescopic mechanism (3) is arranged between the two fixed plates (1); The first telescopic mechanism (2) is composed of a mounting base plate (201), a telescopic plate (202), a spring piece (205), an anti-slip section (206) and a positioning section (207); the telescopic plate (202) is fixedly connected to the top of the mounting base plate (201); a mounting groove (203) is provided on the bottom surface of the fixed plate (1); and the spring piece (205) is fixedly connected to a side of the telescopic plate (202) close to the positioning through groove (204).

2. A trip bracket for a molded case circuit breaker according to claim 1, characterized in that: The anti-slip section (206) is arranged on a side of the spring sheet (205) away from the telescopic plate (202), and the positioning section (207) is fixedly connected to the top end of the spring sheet (205).

3. The trip bracket for a molded case circuit breaker according to claim 1, characterized in that: A positioning through slot (204) is provided on one side of the installation slot (203), and the positioning section (207) is adapted to the size of the positioning through slot (204).

4. The trip bracket for a molded case circuit breaker according to claim 1, characterized in that: The second telescopic mechanism (3) is composed of a fixed shaft (301), a connecting shaft (302), a limiting strip (303), a fixed block (307), a rotating shaft (308), a rotating block (309), a positioning column (310) and a spring (311). There are two fixed shafts (301), which are arranged on the left and right sides and are respectively fixedly connected to one side of the fixed plate (1). The connecting shaft (302) is fixedly connected to the left end of the right fixed shaft (301). The limiting strip (303) is fixedly connected to the bottom surface of the connecting shaft (302). One end of the left fixed shaft (301) is provided with a connecting groove (304) adapted to the connecting shaft (302).

5. A trip bracket for a molded case circuit breaker according to claim 4, characterized in that: A limiting groove (305) is provided on the bottom surface of the connecting groove (304), and the limiting strip (303) is adapted to the size of the limiting groove (305).

6. A trip bracket for a molded case circuit breaker according to claim 4, characterized in that: The fixed block (307) is symmetrically fixedly connected above the right fixed shaft (301), the rotating shaft (308) is fixedly connected between the two fixed blocks (307), the rotating block (309) is rotatably connected to the outside of the rotating shaft (308), and the positioning column (310) is fixedly connected to the bottom surface of the left end of the rotating block (309).

7. A trip bracket for a molded case circuit breaker according to claim 4, characterized in that: The top surface of the connecting shaft (302) is provided with a positioning groove (306), and the size of the positioning column (310) is adapted to the positioning groove (306), and the spring (311) is fixedly connected between the bottom surface of the right end of the rotating block (309) and the outer wall of the right fixed shaft (301).

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