A low-voltage molded case switch housing structure

Abstract

The utility model discloses a low pressure plastic shell switch casing structure, including plastic shell switch body, be equipped with a plurality of binding post on plastic shell switch body, be equipped with wire pressing bolt and lock groove in binding post, the limiting piece is equipped with on wire pressing bolt, the inner wall of lock groove set up on binding post is equipped with guide slot, the limiting piece is equipped with sliding block in the guide slot sliding, is used for limiting wire pressing bolt relative lock groove and is separated, the plastic shell switch casing structure of the utility model, through the improvement setting of binding post structure, thereby make wire pressing bolt when cable dismounting and be stuck in binding post and cannot separate, avoided the accidental loss of bolt and avoided the problem that bolt falls in the electric power equipment cabinet and causes the electric power risk.

Description

Technical Field

[0001] This utility model relates to the field of power equipment component technology, specifically to a low-voltage plastic case switch housing structure. Background Technology

[0002] Molded case circuit breakers are a key component in power distribution systems, used for overload, short circuit, and undervoltage protection of lines and electrical equipment. The circuit breaker has terminals at both ends.

[0003] Chinese patent application CN202322509665.2 discloses a molded case circuit breaker. Referring to its accompanying drawings, the terminals of the existing molded case circuit breaker are fixed to both ends of the circuit breaker housing by fastening screws for connecting external cables. Referring to the drawings, the housing portion of the existing molded case circuit breaker for installing the terminals typically has a U-shaped notch. The fastening screws for the terminals lack a secure fixing mechanism; they can be completely removed during the tightening and loosening of the terminals for wiring, easily leading to screw loss and the need to find suitable replacement screws, thus presenting a design flaw. Utility Model Content

[0004] In view of the prior art, the technical solution adopted by this utility model is as follows: a low-voltage molded case switch housing structure, including a molded case switch body, a plurality of terminal blocks are provided on the molded case switch body, a wire pressing bolt and a locking groove are provided in the terminal block, a limiting member is sleeved on the wire pressing bolt, a guide groove is provided on the inner wall of the locking groove provided on the terminal block, and the limiting member is also provided with a slider that slides in the guide groove to limit the wire pressing bolt from disengaging from the locking groove.

[0005] As a further feature of the above solution, the limiting member is provided with a tool groove and a screw hole, wherein the diameter of the tool groove is smaller than the nut size of the wire clamping bolt.

[0006] As a further feature of the above solution, the tool slot is also provided with a snap-in groove that matches the screw head of the wire pressing bolt, and the side of the limiting member is provided with a connecting groove that matches the shank of the wire pressing bolt. The connecting groove connects the snap-in groove and the screw hole.

[0007] As a further feature of the above scheme, the guide groove is a T-shaped hollow groove structure with a smaller outer diameter and a larger inner diameter. The slider is T-shaped and matches the guide groove. The guide groove and the bolt hole on the locking groove for fixing the wire clamping bolt extend coaxially.

[0008] As a further feature of the above solution, the terminal block is also provided with a wedge groove and an insulating plate. The insulating plate is also provided with a blocking plate, which is configured to engage with the guide groove to block the opening of the guide groove.

[0009] Beneficial effects: The plastic-cased switch housing structure of this utility model improves the terminal block structure, so that the clamping bolt is stuck in the terminal block and cannot be removed when the cable is installed or removed, thus avoiding the accidental loss of the bolt and the electrical risk caused by the bolt falling into the power equipment cabinet. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0011] Figure 2 This is a schematic diagram of the limiting member and pressure bolt structure in this embodiment.

[0012] Figure 3 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0013] Reference numerals in the attached drawings: 1. Molded case switch body; 2. Terminal block; 20. Bolt hole; 21. Wire clamping bolt; 22. Locking groove; 23. Limiting component; 24. Slider; 25. Guide groove; 26. Insertion groove; 27. Tool groove; 28. Screw hole; 29. ​​Connecting groove; 3. Wedge groove; 31. Insulating plate; 32. Blocking plate. Detailed Implementation

[0014] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other.

[0015] Example 1: refer to Figure 1 and Figure 2 The low-voltage plastic-cased switch housing structure of this utility model is shown below. Figure 1 The molded case switch body 1 is provided with several terminal blocks 2 for connecting external cable terminals. In this embodiment, the terminal blocks 2 are mainly used for wiring perforated metal terminals (metal copper nose terminals), such as... Figure 1 The terminal block 2 includes a locking groove 22, within which a bolt hole 20 is provided. The bolt hole 20 is used for installing a wire clamping bolt 21. Furthermore, during use, the wire clamping bolt 21 passes through the hole of the metal terminal and is threadedly connected and fixed in the bolt hole 20. During disassembly, the wire clamping bolt 21 needs to be loosened and disengaged from the bolt hole 20. Then, the metal terminal is removed from the wire clamping bolt 21 and detached from the terminal block 2. In this embodiment, the terminal block 2 has a guide groove 25 on the inner wall of the locking groove 22, and a restraining member 23 is fitted onto the wire clamping bolt 21. Figure 1 and Figure 2 The limiting member 23 shown requires first flipping the wire clamping bolt 21 and pressing the head of the wire clamping bolt 21 sideways into the locking groove 26, and then flipping it as shown. Figure 2 As shown in the diagram, the limiting member 23 is then inserted into the guide groove 25, as follows. Figure 1 or Figure 3 As shown, once the wire clamping bolt 21 is engaged, it cannot be flipped off the limiting member 23. This ensures that the wire clamping bolt 21 will not fall off the locking groove 22 of the terminal block 2 during the disassembly and assembly process, thus avoiding the risk of the wire clamping bolt 21 being left inside the power cabinet.

[0016] As a further feature of the above solution, the limiting member 23 is provided with a tool groove 27 and a screw hole 28. The diameter of the tool groove 27 is smaller than the nut size of the wire clamping bolt 21. The tool groove 27 is also provided with a snap-fit ​​groove 26 that matches the screw head of the wire clamping bolt 21. The side of the limiting member 23 is provided with a connecting groove 29 that matches the rod of the wire clamping bolt 21. The connecting groove 29 connects the snap-fit ​​groove 26 and the screw hole 28. The size limitation of the tool groove 27 can prevent the wire clamping bolt 21 from directly detaching upwards. The purpose of this feature is to ensure that the wire clamping bolt 21 has only one way of detaching, thus ensuring that the wire clamping bolt 21 will not detach or fall off during use without being disassembled.

[0017] As a further feature of the above scheme, the guide groove 25 is a T-shaped hollow groove structure with a smaller outer side and a larger inner side. The slider 24 is T-shaped and matches the guide groove 25. The guide groove 25 and the bolt hole 20 on the locking groove 22 for fixing the wire bolt 21 extend coaxially.

[0018] As a further feature of the above solution, the terminal block 2 is also provided with a wedge groove 3 and an insulating plate 31.

[0019] Example 2: This utility model also provides another implementation method, such as... Figure 3 The structural diagram of Embodiment 2 shown is different from that of Embodiment 2. Figure 1 In Embodiment 1, the opening of the guide groove 25 is located at the top. After the slider 24 is inserted, in order to prevent it from falling off, a blocking plate 32 is also provided on the insulating plate 31. When the insulating plate 31 is installed, the blocking plate 32 is inserted relative to the guide groove 25 to block the opening of the guide groove 25, thereby preventing the limiting member 23 from falling off directly. When the insulating plate 31 is inserted and not disassembled, the limiting member 23 is stably installed.

[0020] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A low-voltage molded case switch housing structure, characterized in that: The device includes a plastic-cased switch body (1), which is provided with several terminal blocks (2). Each terminal block (2) is provided with a wire clamping bolt (21) and a locking groove (22). A limiting member (23) is fitted on the wire clamping bolt (21). The inner wall of the locking groove (22) provided on the terminal block (2) is provided with a guide groove (25). The limiting member (23) is also provided with a slider (24) which slides within the guide groove (25) to limit the wire clamping bolt (21) from disengaging from the locking groove (22).

2. The low-voltage molded case switch housing structure according to claim 1, characterized in that: The limiting member (23) is provided with a tool groove (27) and a screw hole (28), the diameter of which is smaller than the nut size of the wire clamping bolt (21).

3. The low-voltage molded case switch housing structure according to claim 2, characterized in that: The tool slot (27) is also provided with a snap-in slot (26) that matches the screw head of the wire clamping bolt (21). The side of the limiting member (23) is provided with a connecting slot (29) that matches the rod of the wire clamping bolt (21). The connecting slot (29) connects the snap-in slot (26) and the screw hole (28).

4. The low-voltage molded case switch housing structure according to claim 1, characterized in that: The guide groove (25) is a T-shaped hollow groove structure with a smaller outer side and a larger inner side. The slider (24) is T-shaped and matches the guide groove (25). The guide groove (25) and the bolt hole (20) on the locking groove (22) for fixing the wire bolt (21) extend in the same direction.

5. The low-voltage molded case switch housing structure according to claim 1, characterized in that: The terminal block (2) is also provided with a wedge groove (3) and an insulating plate (31). The insulating plate (31) is also provided with a blocking plate (32). The blocking plate (32) is inserted into the guide groove (25) to block the opening of the guide groove (25).

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