A plastic housing type circuit breaker
By introducing structures such as sleeve plates, limit rods, and threaded rods into the plastic-cased circuit breaker, the circuit breaker housing can be easily installed and disassembled, solving the problem of difficult disassembly and improving the ease of maintenance of internal components.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN HUAYE INTELLIGENT COMM TECH CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-06-02
AI Technical Summary
Existing plastic-cased circuit breakers are not easy to disassemble and install, making it difficult to replace and maintain internal components.
The design incorporates a sleeve plate, a limit rod, a threaded rod, a threaded cylinder, a limit seat, a through hole, a slot, a base plate, and a post. The sliding connection and threaded connection enable convenient installation and removal of the circuit breaker's rear and front housings.
It enables convenient installation and disassembly of plastic-cased circuit breakers, facilitating the inspection and replacement of internal components.
Smart Images
Figure CN224318435U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of molded case circuit breakers, specifically a plastic-cased circuit breaker. Background Technology
[0002] Molded case circuit breakers, also known as modular circuit breakers, are circuits where all components are housed in a plastic casing. Auxiliary contacts, undervoltage release devices, and shunt trip devices are often modular. Due to their very compact structure, molded case circuit breakers are virtually impossible to maintain and are suitable for use as branch circuit protection switches. They are mostly operated manually, but high-capacity models can be electrically operated.
[0003] Currently, existing plastic-cased circuit breakers are inconvenient to disassemble and install, and if they are damaged, it is inconvenient to replace and repair their internal components later.
[0004] Therefore, a plastic-cased circuit breaker is needed to improve the above problems. Utility Model Content
[0005] The purpose of this invention is to provide a plastic-cased circuit breaker to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A plastic-cased circuit breaker includes a rear casing and a front casing. A front casing is mounted at the front end of the rear casing. Sleeves are symmetrically arranged on the left and right sides of the rear casing, with a limit rod inside each sleeve. The inner end of the limit rod has a threaded rod, and a threaded cylinder is fitted onto the inner end of the threaded rod. A limit seat is provided at the connection points on the left and right sides of the rear casing, located at the outer end of the limit rod. A through hole is formed on the inner connecting surface of the limit seat, and a slot is formed on the front of the limit seat. Base plates are symmetrically arranged on the left and right sides of the front casing, with a post on the rear side of each base plate. Limit holes are formed on the inner connecting surface of each post.
[0008] As a preferred embodiment of this utility model, circuit breaker electronic components are provided inside the rear housing and the front housing of the circuit breaker.
[0009] As a preferred embodiment of this utility model, the limiting rod is designed as a cuboid column structure, and the connection between the limiting rod and the sleeve plate is a sliding connection.
[0010] As a preferred embodiment of this utility model, the connection between the threaded rod and the threaded cylinder is a threaded connection.
[0011] As a preferred embodiment of this utility model, the limiting rod passes through the through hole and extends into the interior of the slot, and the connection between the limiting rod and the through hole is a sliding connection.
[0012] As a preferred embodiment of this utility model, the size of the insertion post and the slot are adapted to each other, and the connection between the insertion post and the slot is a sliding connection.
[0013] As a preferred embodiment of this utility model, the connection between the limiting rod and the limiting hole is a sliding connection.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] 1. In this utility model, the sleeve plate, limiting rod, threaded rod, threaded cylinder, limiting seat, through hole, slot, base plate, plug, and limiting hole facilitate the installation and disassembly of the rear housing and the front housing of the circuit breaker, thereby facilitating the later maintenance of the internal components of the plastic-cased circuit breaker. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure and appearance of this utility model;
[0017] Figure 2 This is a schematic diagram of the external appearance of part of the structure of this utility model;
[0018] Figure 3 This is an exploded view of part of the structure of this utility model.
[0019] In the diagram: 1. Rear casing of circuit breaker; 2. Front casing of circuit breaker; 3. Sleeve plate; 4. Limiting rod; 5. Threaded rod; 6. Threaded cylinder; 7. Limiting seat; 8. Through hole; 9. Slot; 10. Base plate; 11. Insert post; 12. Limiting hole. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0021] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, and several embodiments of the utility model will be provided. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and complete.
[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0024] For examples, please refer to Figure 1-3 This utility model provides a technical solution:
[0025] A plastic-cased circuit breaker includes a rear casing 1, a front casing 2 installed at the front end of the rear casing 1, sleeves 3 symmetrically arranged at the connection points on the left and right sides of the rear casing 1, a limit rod 4 is provided inside the sleeve 3, a threaded rod 5 is provided at the inner end of the limit rod 4, and a threaded cylinder 6 is sleeved at the inner end of the threaded rod 5, a limit seat 7 is provided at the connection points on the left and right sides of the rear casing 1 and at the outer end of the limit rod 4, a through hole 8 is provided on the inner connecting surface of the limit seat 7, and a slot 9 is provided on the front side of the limit seat 7, a base plate 10 symmetrically arranged at the connection points on the left and right sides of the front casing 2, a post 11 is provided on the rear side of the base plate 10, and a limit hole 12 is provided on the inner connecting surface of the post 11.
[0026] In this embodiment, circuit breaker electronic components are installed inside the rear housing 1 and the front housing 2 of the circuit breaker. The limiting rod 4 has a rectangular column structure design and is slidably connected to the sleeve plate 3. The threaded rod 5 is threadedly connected to the threaded cylinder 6. The limiting rod 4 passes through the through hole 8 and extends into the slot 9, and is slidably connected to the through hole 8. The plug 11 is sized and matched to the slot 9, and is slidably connected to the slot 9. The limiting rod 4 is slidably connected to the limiting hole 12. The sleeve plate 3, limiting rod 4, threaded rod 5, threaded cylinder 6, limiting seat 7, through hole 8, slot 9, base plate 10, plug 11, and limiting hole 12 facilitate the installation and disassembly of the rear housing and the front housing of the circuit breaker, thereby facilitating the later maintenance of the components inside the plastic-cased circuit breaker.
[0027] The working process of this utility model is as follows: When installing the rear housing 1 and the front housing 2 of the circuit breaker, first insert the plug 11 into the slot 9, then rotate the threaded cylinder 6 to make the threaded rod 5 turn out of the threaded cylinder 6. Then the threaded rod 5 will slide outward, and then the limiting plug 4 will pass through the through hole 8 and be inserted into the limiting hole 12. At this time, the installation of the rear housing 1 and the front housing 2 of the circuit breaker is completed. When disassembling, rotate the threaded cylinder 6 in the opposite direction to make the threaded rod 5 move inward towards the threaded cylinder 6. At this time, the limiting plug 4 will be pulled out from the limiting hole 12 and the through hole 8. At this time, the disassembly of the rear housing 1 and the front housing 2 of the circuit breaker is completed. The sleeve plate 3, the limiting plug 4, the threaded rod 5, the threaded cylinder 6, the limiting seat 7, the through hole 8, the slot 9, the base plate 10, the plug 11, and the limiting hole 12 can facilitate the installation and disassembly of the rear housing and the front housing of the circuit breaker, thereby facilitating the later maintenance of the internal components of the plastic housing circuit breaker.
[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A plastic-cased circuit breaker, comprising a rear casing (1), characterized in that: The front end of the circuit breaker rear housing (1) is equipped with a circuit breaker front housing (2). The left and right sides of the circuit breaker rear housing (1) are symmetrically provided with sleeve plates (3). The sleeve plates (3) are provided with limit rods (4). The inner end of the limit rods (4) is provided with threaded rods (5). The inner end of the threaded rods (5) is sleeved with threaded cylinders (6). The left and right sides of the circuit breaker rear housing (1) are provided with limit seats (7) located at the outer end of the limit rods (4). The inner connecting surface of the limit seats (7) is provided with through holes (8). The front of the limit seats (7) is provided with slots (9). The left and right sides of the circuit breaker front housing (2) are symmetrically provided with base plates (10). The rear side of the base plates (10) is provided with plugs (11). The inner connecting surface of the plugs (11) is provided with limit holes (12).
2. A plastic-cased circuit breaker according to claim 1, characterized in that: The circuit breaker electronic components are installed inside the rear casing (1) and the front casing (2) of the circuit breaker.
3. A plastic-cased circuit breaker according to claim 1, characterized in that: The limiting rod (4) has a rectangular column structure design, and the limiting rod (4) is connected to the sleeve (3) by a sliding connection.
4. A plastic-cased circuit breaker according to claim 1, characterized in that: The threaded rod (5) and the threaded cylinder (6) are connected by a threaded connection.
5. A plastic-cased circuit breaker according to claim 1, characterized in that: The limiting rod (4) passes through the through hole (8) and extends into the interior of the slot (9), and the limiting rod (4) and the through hole (8) are connected by a sliding connection.
6. A plastic-cased circuit breaker according to claim 1, characterized in that: The size and shape of the insert (11) are adapted to the slot (9), and the connection between the insert (11) and the slot (9) is a sliding connection.
7. A plastic-cased circuit breaker according to claim 1, characterized in that: The limiting rod (4) and the limiting hole (12) are connected by a sliding connection.