An electronic molded case circuit breaker

Abstract

The utility model discloses an electronic moulded case circuit breaker, including bottom shell, install the middle frame of bottom shell one side, the upper cover of fixed on the middle frame and the operation shaft of activity setting in the inside of bottom shell, the outside detachable mounting of operation shaft has the handle, is equipped with the jack on the handle, the middle part of upper cover is passed and is equipped with the installation slot, the inside installation of installation slot has the pressure frame for limiting handle, a plurality of clamping blocks are integrally formed to the both sides of pressure frame, the inner wall of installation slot is equipped with the clamping groove that cooperates with clamping block, the top and the bottom of pressure frame all are equipped with the dismounting groove, the symmetrical notch that is equipped with on the upper cover, the notch communicates with installation slot, and the edge of notch is equipped with the cushion block, the utility model dismounts handle, need not to dismount the upper cover and the middle frame, only need to dismount pressure frame, can dismount handle, and the dismounting step is convenient, effectively promotes maintenance efficiency, and pressure frame is fixed through clamping block and clamping groove cooperation, and installation is very convenient.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to an electronic molded case circuit breaker. Background Technology

[0002] An electronic molded case circuit breaker is a low-voltage electrical appliance that uses a plastic shell as insulation and protection and employs electronic components to provide protection against overload, short circuit, and ground fault. It is mainly used in power distribution systems to provide overload and short circuit protection for lines and equipment. The handle is an important operating component of the electronic molded case circuit breaker, used to perform manual opening and closing operations of the circuit breaker.

[0003] The handle of the existing electronic molded case circuit breaker uses a plastic shell for limit fixation. When the handle is damaged and needs to be replaced, the top cover and middle frame need to be removed. The top cover and middle frame are fixed to the base by multiple screws. The disassembly operation is cumbersome, and after disassembly, other parts are prone to displacement. Recalibration is required afterward, which makes the handle replacement process complicated and maintenance inefficient. Utility Model Content

[0004] The purpose of this invention is to provide an electronic molded case circuit breaker to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an electronic molded case circuit breaker, comprising a bottom shell, a middle frame mounted on one side of the bottom shell, a top cover fixed on the middle frame, and an operating shaft movably disposed inside the bottom shell. A handle is detachably mounted on the outer side of the operating shaft, and an insertion hole is provided on the handle. An installation groove is provided through the middle of the top cover, and a pressure frame for limiting the handle is installed inside the installation groove. Multiple locking blocks are integrally formed on both sides of the pressure frame. The inner wall of the installation groove is provided with locking grooves that cooperate with the locking blocks. Disassembly grooves are provided at the top and bottom of the pressure frame. Notches are symmetrically provided on the top cover, and the notches communicate with the installation grooves. Pads are provided at the edges of the notches.

[0006] As a preferred embodiment of this utility model, positioning holes are provided at the four corners of the rear side of the pressure frame, and multiple positioning posts that cooperate with the positioning holes are provided on the middle frame.

[0007] As a preferred embodiment of this utility model, a second sealing groove is provided on the outer side of the pressure frame, a first sealing groove is provided on the inner wall of the mounting groove, and a sealing ring is installed between the first sealing groove and the second sealing groove.

[0008] As a preferred embodiment of this utility model, the pressure frame has an arc-shaped surface on the side near the middle frame, and a through hole is opened in the middle of the pressure frame.

[0009] As a preferred embodiment of this utility model, one end of the handle extends through the through hole to the outside of the pressure frame.

[0010] Compared with the prior art, the beneficial effects of this utility model are: when disassembling the handle, there is no need to disassemble the top cover and the middle frame. Only the pressure frame needs to be disassembled to disassemble the handle. The disassembly steps are convenient and effectively improve maintenance efficiency. In addition, the pressure frame is fixed by the cooperation of the clip and the slot, which makes the installation very convenient. At the same time, the notch and disassembly groove also make it easy to disassemble the pressure frame. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0012] Figure 2 This is an exploded view of the present invention;

[0013] Figure 3 This is a schematic diagram of the structure of the pressure frame after disassembly.

[0014] Figure 4 This is a schematic diagram of the structure of the pressure frame and handle after disassembly.

[0015] Figure 5 This utility model Figure 4 Enlarged view of point A in the middle;

[0016] Figure 6 This is a schematic diagram of the structure of the rear side of the pressure frame of this utility model;

[0017] Figure 7 This is a schematic diagram of the handle of this utility model.

[0018] In the diagram: 1. Bottom shell; 2. Middle frame; 3. Top cover; 4. Operating shaft; 5. Handle; 6. Pressure frame; 7. Pad; 8. Notch; 9. Sealing ring; 10. Slot; 11. First sealing groove; 12. Positioning post; 13. Positioning hole; 14. Through hole; 15. Arc-shaped surface; 16. Slot; 17. Second sealing groove; 18. Mounting groove; 19. Removal groove; 20. Insertion hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1 to 7This utility model provides a technical solution: an electronic molded case circuit breaker, including a bottom shell 1, a middle frame 2 installed on one side of the bottom shell 1, an upper cover 3 fixed on the middle frame 2, and an operating shaft 4 movably disposed inside the bottom shell 1. A handle 5 is detachably installed on the outside of the operating shaft 4, and the handle 5 has a socket 20. The handle 5 is fitted onto the outside of the operating shaft 4 through the socket 20 so that the handle 5 can drive the operating shaft 4 to operate. A mounting groove 18 is formed through the middle of the upper cover 3. A pressure frame 6 for limiting the handle 5 is installed inside the mounting groove 18. When removing the handle 5, only the pressure frame 6 needs to be removed to remove the handle 5. The disassembly steps are convenient and effectively improve maintenance efficiency. Multiple pressure frames are integrally formed on both sides. The locking block 16 has a bevel on the side near the top cover 3 to facilitate the installation of the pressure frame 6 and prevent the pressure frame 6 from being jammed by the locking block 16. The inner wall of the mounting groove 18 has a groove 10 that mates with the locking block 16. The locking block 16 and the groove 10 are used to fix the pressure frame 6 to simplify the installation steps of the pressure frame 6. The top and bottom of the pressure frame 6 are provided with disassembly grooves 19. The pressure frame 6 can be disassembled by inserting an external tool into the disassembly groove 19 and prying it. The top cover 3 has symmetrical notches 8 to facilitate the insertion of external tools into the disassembly grooves 19. The notches 8 are connected to the mounting groove 18. The edge of the notches 8 is provided with pads 7 to provide support and prevent the top cover 3 from being damaged when the external tool is prying the pressure frame 6.

[0021] The pressure frame 6 has positioning holes 13 at the four corners on the rear side, and the middle frame 2 has multiple positioning posts 12 that cooperate with the positioning holes 13. The positioning posts 12 cooperate with the positioning holes 13 to position the pressure frame 6, making the pressure frame 6 more securely installed.

[0022] The outer side of the pressure frame 6 is provided with a second sealing groove 17, and the inner wall of the mounting groove 18 is provided with a first sealing groove 11. A sealing ring 9 is installed between the first sealing groove 11 and the second sealing groove 17. The sealing ring 9 is used to seal the pressure frame 6 and the upper cover 3 to prevent external dust from entering the bottom shell 1 through the gap between the pressure frame 6 and the upper cover 3.

[0023] Among them, the pressure frame 6 has an arc-shaped surface 15 on the side near the middle frame 2. When the handle 5 causes the operating shaft 4 to move, the movement trajectory of the handle 5 is an arc. Therefore, the arc-shaped surface 15 makes the pressure frame 6 fit the handle 5 better, so as to better limit the handle 5. A through hole 14 is opened in the middle of the pressure frame 6.

[0024] One end of the handle 5 extends through the through hole 14 to the outside of the pressure frame 6, so that the user can turn the handle 5.

[0025] Specifically, when the handle 5 is damaged and needs to be replaced, use a screwdriver or other tools to insert into the disassembly slot 19, use the pad 7 as a fulcrum, and use the lever principle to pry the pressure frame 6 to separate it from the top cover 3. After separation, the handle 5 can be removed. The new handle 5 is then fitted onto the outside of the operating shaft 4. Then, the pressure frame 6 is removed, the positioning hole 13 is aligned with the positioning post 12, and the pressure frame 6 is installed into the mounting slot 18 until the pressure frame 6 is unable to move due to the middle frame 2. At this time, the locking block 16 is locked into the locking slot 10 to fix the pressure frame 6. At the same time, the handle 5 is limited by the pressure frame 6 and cannot be separated from the operating shaft 4, thus completing the replacement of the handle 5.

[0026] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms “first,” “second,” “third,” and “fourth” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as “first,” “second,” “third,” or “fourth” may explicitly or implicitly include at least one of those features.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] 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. An electronic molded case circuit breaker, comprising a base (1), a middle frame (2) mounted on one side of the base (1), a top cover (3) fixed on the middle frame (2), and an operating shaft (4) movably disposed inside the base (1), wherein a handle (5) is detachably mounted on the outer side of the operating shaft (4), and the handle (5) has an insertion hole (20), characterized in that: The upper cover (3) has a through-hole mounting groove (18) in the middle. The mounting groove (18) is fitted with a pressure frame (6) for limiting the handle (5). Multiple locking blocks (16) are integrally formed on both sides of the pressure frame (6). The inner wall of the mounting groove (18) is provided with a locking groove (10) that cooperates with the locking block (16). The top and bottom of the pressure frame (6) are provided with disassembly grooves (19). The upper cover (3) is symmetrically provided with notches (8). The notches (8) are connected to the mounting groove (18). The edge of the notches (8) is provided with pads (7).

2. The electronic molded case circuit breaker according to claim 1, characterized in that: The pressure frame (6) has positioning holes (13) at the four corners on the rear side, and the middle frame (2) has a plurality of positioning posts (12) that cooperate with the positioning holes (13).

3. The electronic molded case circuit breaker according to claim 1, characterized in that: The outer side of the pressure frame (6) is provided with a second sealing groove (17), and the inner wall of the mounting groove (18) is provided with a first sealing groove (11). A sealing ring (9) is installed between the first sealing groove (11) and the second sealing groove (17).

4. An electronic molded case circuit breaker according to claim 1, characterized in that: The pressure frame (6) has an arc-shaped surface (15) on the side near the middle frame (2), and a through hole (14) is opened in the middle of the pressure frame (6).

5. An electronic molded case circuit breaker according to claim 1, characterized in that: One end of the handle (5) extends through the through hole (14) to the outside of the pressure frame (6).

Images