Fixing structure of drawer seat copper bus and bakelite chassis nut

Abstract

The utility model discloses a fixing structure for a drawer seat copper bus and a bakelite chassis nut, which comprises a drawer seat and a bakelite chassis formed by compression molding of phenolic resin, the drawer seat is connected with the copper bus, the copper bus is provided with a copper bus mounting hole, and the bakelite chassis is provided with a nut. The fixing structure comprises a bakelite chassis, a plurality of hexagonal nut mounting grooves and a plurality of round holes are pre-formed in the bakelite chassis during compression molding, and the hexagonal nut mounting grooves and the round holes are coaxially arranged and are communicated with each other, and the fixing structure further comprises a plurality of hexagonal iron nuts and a plurality of combined screws. After the hexagon nut mounting groove is uniformly coated with high-temperature-resistant epoxy resin glue, the hexagon angle iron nut is pressed into the hexagon nut mounting groove, and after the copper bus mounting hole is aligned with the hexagon angle iron nut, the combination screw penetrates through the copper bus mounting hole and is screwed into the hexagon angle iron nut. The cost of the fixing structure is obviously reduced, and the process is simple.

Description

Technical Field

[0001] This utility model relates to the technical field of power distribution cabinets, and in particular to a fixing structure for the copper busbar of the drawer seat and the nut of the bakelite base. Background Technology

[0002] Drawer bases are widely used in power distribution cabinets, industrial control equipment, and other fields. Their core function is to achieve electrical conduction and mechanical fixation through the connection between the copper busbar and the bakelite base. In traditional designs, the fixation of the copper busbar and the bakelite base relies on standard copper nuts, which are embedded into the bakelite base through an injection molding process and secured with a combination of hexagonal screws. The advantages of this design are high temperature resistance, strong corrosion resistance, and resistance to rotation. Furthermore, the injection molding process ensures the stability of the connection between the copper nut and the bakelite base.

[0003] As is well known, copper is expensive, and injection molding requires custom molds and has a long production cycle. However, with the increasing requirements for cost control and environmental adaptability of power distribution cabinets and industrial control equipment, the high cost of copper nuts and the complexity of injection molding have become bottlenecks. The traditional design using copper nuts has the following drawbacks: (1) High cost: The price of copper is much higher than that of iron parts, and the injection molding embedding process requires precision molds, which leads to a significant increase in production costs; (2) Complex process: Injection molding requires a high temperature and high pressure environment, has a long production cycle, and copper nuts are prone to displacement during injection molding, affecting the accuracy of the finished product. Summary of the Invention

[0004] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the existing technology, a fixing structure for the copper busbar of the drawer seat and the nut of the bakelite base is provided, which significantly reduces the cost and simplifies the process.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a fixing structure for a drawer seat copper busbar and a bakelite base nut, including a drawer seat and a bakelite base molded from phenolic resin. A copper busbar is connected to the drawer seat, and a copper busbar mounting hole is provided on the copper busbar. The bakelite base is pre-formed with multiple hexagonal nut mounting slots and multiple round holes during molding. The hexagonal nut mounting slots and the round holes are coaxially arranged and interconnected. The fixing structure also includes multiple hexagonal iron nuts and multiple combination screws. After uniformly coating the hexagonal nut mounting slots with high-temperature resistant epoxy resin, the hexagonal iron nuts are pressed into the hexagonal nut mounting slots. After aligning the copper busbar mounting hole with the hexagonal iron nut, the combination screws are passed through the copper busbar mounting hole and screwed into the hexagonal iron nut.

[0006] To be further specific, in the above technical solution, the combined screw is composed of an external hexagonal head screw, a spring washer, and a flat washer, which are tightly combined by a thread rolling process.

[0007] To be further specific, in the above technical solution, the plurality of hexagonal nut mounting slots are distributed at the same angle matrix on the same side of the bakelite base.

[0008] To be further specific, in the above technical solution, the bakelite base frame is pre-formed with multiple rectangular grooves during molding, and the rectangular grooves are adjacent to the hexagonal nut mounting grooves.

[0009] To be further specific, in the above technical solution, the line connecting the vertices of the two acute angles in the hexagonal nut mounting groove coincides with one of the axes of the rectangular groove, and this axis is parallel to the length direction of the rectangular groove.

[0010] To be further specific, in the above technical solution, adjacent rectangular grooves are symmetrically distributed along the length direction of the rectangular groove.

[0011] To be further specific, in the above technical solution, the depth dimension of the rectangular groove is smaller than the depth dimension of the hexagonal nut mounting groove.

[0012] To be further specific, in the above technical solution, the depth of the hexagonal nut mounting groove is the same as the thickness of the hexagonal iron nut.

[0013] The beneficial effects of this utility model are as follows: The fixing structure of the copper busbar of the drawer seat and the nut of the bakelite base of this utility model has the following advantages:

[0014] Significantly reduced costs: The material cost of iron nuts is only 1 / 3 of that of copper nuts;

[0015] Improved high temperature resistance and reliability: High temperature resistant epoxy resin adhesive can withstand temperatures up to 150°C;

[0016] Process compatibility and efficiency optimization: The iron nut fixing process can be completed in the finished product stage, avoiding the complexity of the injection molding process;

[0017] Enhanced environmental adaptability: Through vibration and high temperature tests, the iron nuts did not fall off or loosen under extreme environments, meeting the requirements for long-term use;

[0018] Maintainability: The iron nuts can be replaced individually, reducing the scrap rate of the bakelite base. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0022] Figure 3 yes Figure 1 Enlarged view of a portion of point A in the middle;

[0023] Figure 4 yes Figure 2 Enlarged view of section B in the middle.

[0024] The labels in the diagram are: 1. Phenolic base; 2. Hexagonal nut mounting slot; 3. Round hole; 4. Hexagonal iron nut; 5. Rectangular groove. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] See Figure 1 , Figure 2 , Figure 3 and Figure 4 This utility model discloses a fixing structure for a drawer seat copper busbar and a bakelite base nut, comprising a drawer seat and a bakelite base 1 molded from phenolic resin. A copper busbar is connected to the drawer seat, and the copper busbar has copper busbar mounting holes. The bakelite base 1 is pre-formed with multiple hexagonal nut mounting slots 2 and multiple round holes 3 during molding. The hexagonal nut mounting slots 2 and round holes 3 are coaxially arranged and interconnected. That is, the bakelite base 1 is molded from phenolic resin, and its interior has pre-formed hexagonal nut mounting slots 2. The fixing structure also includes multiple hexagonal iron nuts 4 and multiple combination screws. After uniformly coating the hexagonal nut mounting slots 2 with high-temperature resistant epoxy resin, the hexagonal iron nuts 4 are pressed into the hexagonal nut mounting slots 2. After aligning the copper busbar mounting holes with the hexagonal iron nuts 4, the combination screws are passed through the copper busbar mounting holes and screwed into the hexagonal iron nuts 4.

[0027] The combination screw is made of an external hexagonal main screw, a spring washer, and a flat washer, which are tightly assembled by a thread rolling process. The combination screw is made of iron or 304 stainless steel.

[0028] Preferably, multiple hexagonal nut mounting slots 2 are distributed in a matrix at the same angle on the same side of the bakelite base frame 1. This structural design not only facilitates the installation of hexagonal iron nuts 4, but also facilitates the connection and fixing of the copper busbar of the drawer seat.

[0029] Preferably, the bakelite base frame 1 is pre-formed with multiple rectangular grooves 5 during molding. The rectangular grooves 5 are adjacent to the hexagonal nut mounting grooves 2. The design of the rectangular grooves 5 is mainly used to release the stress of the mold during demolding, and can also be used to release excess epoxy resin.

[0030] Preferably, the line connecting the vertices of the two acute angles in the hexagonal nut mounting groove 2 coincides with one of the axes of the rectangular groove 5, and this axis is parallel to the length direction of the rectangular groove 5. This structural design is to facilitate rapid demolding after molding.

[0031] Preferably, two adjacent rectangular grooves 5 are symmetrically distributed along the length of the rectangular groove 5. This structural design is also to facilitate rapid demolding after molding.

[0032] Preferably, the depth of the rectangular groove 5 is smaller than the depth of the hexagonal nut mounting groove 2. This structural design is also to facilitate rapid demolding after molding.

[0033] Preferably, the depth of the hexagonal nut mounting groove 2 is the same as the thickness of the hexagonal iron nut 4. This structural design is to ensure that the hexagonal iron nut 4 fits tightly against the bottom of the hexagonal nut mounting groove 2 after being embedded, thereby reducing the risk of displacement caused by thermal expansion and contraction.

[0034] The core improvement of this utility model lies in the optimization of the fixing process and structure of the iron nut, specifically including:

[0035] 1. Replace the original high-cost copper nuts (such as copper nuts of model GB809-88) with low-cost iron nuts (such as M6 hexagonal iron nuts of model GB6170).

[0036] 2. The size of the iron nut must be perfectly matched with the combination screw (e.g., M6×20 combination screw) to ensure thread compatibility;

[0037] 3. Use high-temperature resistant epoxy resin adhesive (temperature resistance ≥150°C);

[0038] 4. Optimize the depth of the hexagonal nut mounting slot 2 to ensure that the iron nut fits tightly against the bottom of the slot after being embedded, reducing the risk of displacement caused by thermal expansion and contraction;

[0039] 5. The iron nut fixing process can be completed in the finished product stage of bakelite base frame 1, without the need to modify the existing injection mold, which significantly reduces production costs and cycle time.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A fixing structure for a drawer seat copper busbar and a bakelite base nut, characterized in that: The system includes a drawer base and a bakelite base (1) molded from phenolic resin. The drawer base is connected to a copper busbar, and the copper busbar has copper busbar mounting holes. The bakelite base (1) is pre-formed with multiple hexagonal nut mounting slots (2) and multiple round holes (3) during molding. The hexagonal nut mounting slots (2) and the round holes (3) are coaxially arranged and interconnected. The fixing structure also includes multiple hexagonal iron nuts (4) and multiple combination screws. After uniformly coating the hexagonal nut mounting slots (2) with high-temperature resistant epoxy resin, the hexagonal iron nuts (4) are pressed into the hexagonal nut mounting slots (2). After aligning the copper busbar mounting holes with the hexagonal iron nuts (4), the combination screws are passed through the copper busbar mounting holes and screwed into the hexagonal iron nuts (4).

2. The fixing structure for the copper busbar of the drawer seat and the nut of the bakelite base according to claim 1, characterized in that: The combined screw is made up of an external hexagonal main screw, a spring washer, and a flat washer, which are tightly assembled by a thread rolling process.

3. The fixing structure for the copper busbar of the drawer seat and the nut of the bakelite base according to claim 1, characterized in that: Multiple hexagonal nut mounting slots (2) are distributed at the same angle matrix on the same side of the bakelite base frame (1).

4. The fixing structure for the copper busbar of the drawer seat and the nut of the bakelite base according to claim 3, characterized in that: The bakelite base frame (1) has multiple rectangular grooves (5) pre-formed during molding, and the rectangular grooves (5) are adjacent to the hexagonal nut mounting grooves (2).

5. The fixing structure for the copper busbar of the drawer seat and the nut of the bakelite base according to claim 4, characterized in that: The line connecting the vertices of the two acute angles in the hexagonal nut mounting groove (2) coincides with one of the axes of the rectangular groove (5), and this axis is parallel to the length direction of the rectangular groove (5).

6. The fixing structure for the copper busbar of the drawer seat and the nut of the bakelite base according to claim 5, characterized in that: Along the length direction of the rectangular groove (5), two adjacent rectangular grooves (5) are symmetrically distributed.

7. The fixing structure for the copper busbar of the drawer seat and the nut of the bakelite base according to claim 4, characterized in that: The depth dimension of the rectangular groove (5) is smaller than the depth dimension of the hexagonal nut mounting groove (2).

8. The fixing structure for the copper busbar of the drawer seat and the nut of the bakelite base according to claim 1, characterized in that: The depth dimension of the hexagonal nut mounting groove (2) is the same as the thickness dimension of the hexagonal iron nut (4).

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