Miniature molded case circuit breaker
By setting the limit port and limit block in the installation cavity of the plastic case circuit breaker, the position of the static contact is fixed, and the clamping of the static contact is solved, ensuring good contact and extended service life.
Patent Information
- Application Number
- CN202421016861.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-11
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-05-11
AI Technical Summary
During the closing and opening of the existing plastic case circuit breakers, the contact between the moving contact and the static contact causes vibration, resulting in a deviation in the position of the static contact, resulting in poor contact form or inability to contact, thereby reducing the service life.
A small plastic case circuit breaker is designed. By setting a limit port and a limit block in the installation cavity, the limit port is connected to the surface of the limit block to fix the position of the static contact to prevent position deviation, and the fixing effect on the static contact is achieved through the clamping block and the limit plate.
It effectively prevents the position of the static contact, ensures good contact between the static contact and the static contact, and extends the service life of the plastic case circuit breaker.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit breakers, in particular to a small molded case circuit breaker. Background Art
[0002] Molded case circuit breakers are a commonly used power distribution protection device. They have the functions of load power supply and overload and short circuit protection and are widely used in power distribution systems. Compared with miniature circuit breakers of the same specifications, molded case circuit breakers have the advantages of large breaking current, strong overload capacity and stable working performance.
[0003] At present, the design of the installation platform for the static contact of the molded case circuit breaker in each installation cavity is relatively simple. During the closing and opening process of the molded case circuit breaker, the moving contact contacts the static contact driven by the traction rod, which will produce certain vibrations. After long-term use, the static contact position will deviate, resulting in poor contact between the moving contact and the static contact, or even a phenomenon of being unable to contact, resulting in a reduced service life of the molded case circuit breaker. Summary of the invention
[0004] The purpose of the utility model is to provide a small molded case circuit breaker to solve the problem mentioned in the above background technology that the installation platform design for the static contact in each installation cavity of the current molded case circuit breaker is relatively simple. During the closing and opening process of the molded case circuit breaker, the moving contact contacts with the static contact driven by the traction rod, which will produce a certain vibration. After long-term use, the static contact position will deviate, resulting in poor contact between the moving contact and the static contact, or even a phenomenon of no contact, resulting in a reduced service life of the molded case circuit breaker.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a small molded case circuit breaker, comprising a base and a static contact, wherein a plurality of partitions are equidistantly fixedly connected inside the base, and an installation cavity is formed between two of the partitions, installation platforms are arranged at both ends of the installation cavity, a connection position is provided between the installation platform and the installation cavity, a limiting block is fixedly connected at the center of the surface of the connection position, a clamping block is symmetrically fixedly connected to the surface of the connection position behind the side of the limiting block, a limiting plate is clamped on the clamping block, a positioning hole is provided at the center of the surface of the installation platform, the bottom surface of one end of the static contact is clamped in the positioning hole, the other end of the static contact is sleeved on the limiting block, and the bottom surface of the limiting plate is in contact with the surface of the static contact.
[0006] Preferably, a avoidance opening is provided in the middle of each of the partitions, an operating rod is rotatably connected to the avoidance opening, and a moving contact is fixedly connected to the surface of the operating rod at a position opposite to the installation cavity.
[0007] Preferably, the stationary contact comprises a wiring portion, a connecting portion and a contact portion, one end of the connecting portion is fixedly connected to the wiring portion, and the other end of the connecting portion is fixedly connected to the contact portion.
[0008] Preferably, a through hole is formed on the top surface of the wiring portion, a cylindrical tube is fixedly connected to the bottom surface of the wiring portion at a position opposite to the through hole, and the cylindrical tube is clamped and fixed in the positioning hole.
[0009] Preferably, a limiting opening is provided on the surface of the connection portion at a position opposite to the limiting block, and the limiting opening is sleeved on the surface of the limiting block.
[0010] Preferably, the clamping block comprises a fixed block and a connecting block, the fixed block is fixedly connected to the connecting position surface, the connecting block is fixedly connected to an end surface of one end of the fixed block, and convex bulges are fixedly connected to the left and right sides of the surface of the connecting block.
[0011] Preferably, a connection port is provided on the surface of the limiting plate at a position opposite to the connection block, and a connection block is plugged into the connection port, and an inner wall of the connection port is in contact with the convex hull surface.
[0012] Beneficial Effects
[0013] Compared with the existing technology, the beneficial effects of the utility model are:
[0014] The utility model provides a limit opening and a limit block, and the limit opening is sleeved on the surface of the limit block, so as to limit the static contact and prevent the static contact from positional displacement. At the same time, a clamping block is fixedly connected in the connection position, and the clamping block is clamped with the limit plate, and the bottom surface of the limit plate contacts the surface of the static contact, thereby achieving a regular fixing effect and effectively solving the problems raised in the background technology. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 This is a schematic diagram of the base structure of the utility model;
[0017] Figure 3 This is a schematic diagram of the structure of the static contact of the utility model;
[0018] Figure 4 This is a schematic diagram of the exploded structure of the clamping block and the limiting plate of the utility model;
[0019] Figure 5 It is a schematic diagram of the enlarged structure of point A of the utility model.
[0020] 1. Base; 2. Partition; 3. Operating lever; 4. Moving contact; 5. Static contact; 6. Block; 7. Limit plate;
[0021] 11. Installation cavity; 12. Installation platform; 13. Connection position; 14. Limit block; 15. Positioning hole; 21. Avoidance;
[0022] 51. Wiring part; 52. Connecting part; 53. Contact part; 54. Through hole; 55. Cylindrical tube; 56. Limit opening;
[0023] 61. Fixing block; 62. Connecting block; 63. Convex hull; 71. Connecting port. DETAILED DESCRIPTION
[0024] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore are not to be construed as limiting the present invention. In addition, the terms "first", "second" and "third" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance.
[0026] like Figure 1-5 It is a structural schematic diagram of a small molded case circuit breaker of a preferred embodiment of the utility model. In this embodiment, a small molded case circuit breaker includes a base 1 and a static contact 5. A plurality of partitions 2 are fixedly connected in the base 1, and an installation cavity 11 is formed between two partitions 2. Installation platforms 12 are arranged at both ends of the installation cavity 11, and a connecting position 13 is opened between the installation platform 12 and the installation cavity 11. A limiting block 14 is fixedly connected at the center of the surface of the connection position 13. At the same time, a clamping block 6 is symmetrically fixedly connected to the surface of the connection position 13 at the rear side of the limiting block 14. A limiting plate 7 is clamped on the clamping block 6, and a positioning hole 15 is opened at the center of the surface of the installation platform 12. The bottom surface of one end of the static contact 5 is clamped in the positioning hole 15, and the other end of the static contact 5 is sleeved on the limiting block 14, and the bottom surface of the limiting plate 7 is in contact with the surface of the static contact 5. Through the coordinated use of the above structure, the fixing effect of the static contact 5 is achieved, which effectively solves the problems raised in the background technology.
[0027] In this embodiment, a avoidance opening 21 is opened in the middle of the partition 2, and an operating rod 3 is rotatably connected to the avoidance opening 21, and a moving contact 4 is fixedly connected to the surface of the operating rod 3 at a position relative to the mounting cavity 11. The operating rod 3 is rotated to drive the moving contact 4 and the static contact 5 to realize the opening and closing of the molded case circuit breaker.
[0028] In this embodiment, the stationary contact 5 includes a wiring portion 51 , a connecting portion 52 and a contact portion 53 . The wiring portion 51 is fixedly connected to one end of the connecting portion 52 , and the contact portion 53 is fixedly connected to the other end of the connecting portion 52 .
[0029] In this embodiment, a through hole 54 is opened on the top surface of the wiring portion 51 , and a cylindrical tube 55 is fixedly connected to the bottom surface of the wiring portion 51 at a position opposite to the through hole 54 , and is fixed in the positioning hole 15 by snapping the cylindrical tube 55 .
[0030] In this embodiment, a limiting opening 56 is opened on the surface of the connecting portion 52 at a position relative to the limiting block 14, and the limiting opening 56 is sleeved on the surface of the limiting block 14, and the cylindrical tube 55 is clamped and fixed to the positioning hole 15. The design of the two structures is combined to achieve the fixation of the position of the static contact 5 and prevent the static contact 5 from lateral displacement due to vibration.
[0031] In this embodiment, the clamping block 6 includes a fixed block 61 and a connecting block 62, and the fixed block 61 is fixedly connected to the surface of the connecting position 13, the connecting block 62 is fixedly connected to the end face of one end of the fixed block 61, and convex bulges 63 are fixedly connected to the left and right sides of the surface of the connecting block 62. A connecting port 71 is opened on the surface of the limiting plate 7 at a position relative to the connecting block 62, and the connecting block 62 is plugged into the connecting port 71. This structural setting can fix the static contact 5 and prevent the cylindrical tube 55 in the static contact 5 from being separated from the positioning hole 15 and the limiting block 14 from being separated from the limiting port 56 due to shaking. At the same time, the inner wall of the connecting port 71 contacts the surface of the convex bulge 63, thereby increasing the connection ability between the connecting block 62 and the connecting port 71.
[0032] How it works
[0033] During specific use, first align the cylindrical tube 55 in the static contact 5 with the positioning hole 15 and the limiting opening 56 with the limiting block 14 and install it longitudinally in the connecting position 13. After installation in place, align the connecting opening 71 in the limiting plate 7 with the connecting block 62, and move the limiting plate 7 laterally toward the connecting block until the connecting opening 71 and the connecting block 62 are snapped into place with each other to complete the installation of the static contact 5.
[0034] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.
Claims
1. A small molded case circuit breaker, comprising a base (1) and a static contact (5), wherein a plurality of partitions (2) are fixedly connected at equal intervals inside the base (1), and an installation cavity (11) is formed between two of the partitions (2), and installation platforms (12) are arranged at both ends of the installation cavity (11), and a connection position (13) is provided between the installation platform (12) and the installation cavity (11), characterized in that: A limiting block (14) is fixedly connected at the center of the surface of the connection position (13); a clamping block (6) is symmetrically fixedly connected to the surface of the connection position (13) and is located behind the limiting block (14); a limiting plate (7) is clamped on the clamping block (6); a positioning hole (15) is provided at the center of the surface of the mounting platform (12); the bottom surface of one end of the stationary contact (5) is clamped in the positioning hole (15); the other end of the stationary contact (5) is sleeved on the limiting block (14); and the bottom surface of the limiting plate (7) is in contact with the surface of the stationary contact (5).
2. A small molded case circuit breaker according to claim 1, characterized in that: The partition (2) is provided with an escape opening (21) in the middle, an operating rod (3) is rotatably connected to the escape opening (21), and a moving contact (4) is fixedly connected to the surface of the operating rod (3) at a relative position to the installation cavity (11).
3. A small molded case circuit breaker according to claim 1, characterized in that: The stationary contact (5) comprises a wiring portion (51), a connecting portion (52) and a contact portion (53); one end of the connecting portion (52) is fixedly connected to the wiring portion (51), and the other end of the connecting portion (52) is fixedly connected to the contact portion (53).
4. A small molded case circuit breaker according to claim 3, characterized in that: A through hole (54) is provided on the top surface of the wiring portion (51), and a cylindrical tube (55) is fixedly connected to the bottom surface of the wiring portion (51) at a position relative to the through hole (54), and the cylindrical tube (55) is snap-fitted and fixed in the positioning hole (15).
5. A small molded case circuit breaker according to claim 3, characterized in that: A limiting opening (56) is provided on the surface of the connection portion (52) at a position relative to the limiting block (14), and the limiting opening (56) is sleeved on the surface of the limiting block (14).
6. A small molded case circuit breaker according to claim 1, characterized in that: The clamping block (6) comprises a fixed block (61) and a connecting block (62); the fixed block (61) is fixedly connected to the surface of the connecting position (13); the connecting block (62) is fixedly connected to an end surface of one end of the fixed block (61); and convex bulges (63) are fixedly connected to the left and right sides of the surface of the connecting block (62).
7. A small molded case circuit breaker according to claim 1, characterized in that: A connection port (71) is provided on the surface of the limiting plate (7) at a position relative to the connection block (62), and the connection block (62) is plugged into the connection port (71), and the inner wall of the connection port (71) is in contact with the surface of the convex bump (63).