Busbar protective sleeve

Abstract

The utility model provides a busbar protective sleeve, which is used for coating a conductive metal shaft body of a busbar, and comprises an insulation body assembly, the insulation body assembly comprises a first shell member and a second shell member, and the first shell member and the second shell member form detachable connection through an interlocking connection structure; the first shell component and the second shell component are connected to form a wrapping cavity used for wrapping the metal shaft body. Through the above technical scheme, the utility model can effectively solve the problem of short circuit caused by tin whisker growth in the prior art, overcomes the problem of protection failure caused by collision shedding and overlarge gap in the traditional separator plate scheme, and significantly improves the insulation protection effect and operation reliability of the busbar.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a busbar protection sleeve. Background Technology

[0002] In power transmission and distribution systems, busbars are crucial electrical connection components, commonly used in switchboards, distribution boxes, and other equipment. Their primary function is to connect lines operating at the same voltage via conductive copper or aluminum shafts. However, in component manufacturing, especially in lead-free processes, pure tin plating is often used instead of traditional tin-lead plating. While this process is environmentally friendly, it causes the pure tin plating to develop dendritic protrusions called tin whiskers over time. The growth of tin whiskers can lead to short circuits between adjacent conductive components, thus affecting the normal operation of electrical equipment.

[0003] To address the solder whisker problem, existing technologies often use polytetrafluoroethylene (PTFE) (Teflon) separators to isolate conductive components and prevent short circuits caused by solder whisker contact. However, these separators have limitations: firstly, they are easily detached from impacts during practical use, leading to protective failure; secondly, the gaps between the separators are relatively large, making it impossible to completely eliminate the risk of short circuits. Therefore, developing a more reliable and stable insulation protection scheme to effectively prevent short circuits caused by solder whiskers is a pressing technical challenge in the field of electrical equipment insulation protection. Utility Model Content

[0004] In order to solve all or part of the problems of the prior art, this utility model provides a busbar protective sleeve, which achieves tight wrapping and reliable insulation protection of the conductive metal shaft of the busbar through innovative structural design and material selection.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A busbar protective sleeve for covering the conductive metal shaft of a busbar, comprising:

[0007] An insulating body assembly, the insulating body assembly including a first housing component and a second housing component, the first housing component and the second housing component being detachably connected by an interlocking connection structure;

[0008] After the first housing component is connected to the second housing component, a covering cavity is formed for enclosing the metal shaft.

[0009] The first housing component is provided with a first semi-enclosed cavity that is adapted to the outer surface contour of the metal shaft, and the second housing component is provided with a second semi-enclosed cavity that is docked with the first semi-enclosed cavity to form a complementary fit.

[0010] The first housing component has first limiting bosses of equal height at the four corners of the mating end face, and the first semi-enclosed cavity extends laterally between the first limiting bosses.

[0011] The second housing component consists of two symmetrically arranged split parts. Each split part has two second limiting protrusions on its mating end face along the vertical direction. The second limiting protrusions match the first limiting protrusions. The second semi-enclosing cavity extends laterally between the second limiting protrusions.

[0012] The vertical height of the first limiting boss and the second limiting boss is less than the gap value after the busbar and the metal shaft are assembled.

[0013] The interlocking connection structure includes a snap-fit ​​groove disposed on the engagement surface of the first limiting boss and a snap-fit ​​block disposed on the engagement surface of the second limiting boss. The snap-fit ​​groove and the snap-fit ​​block cooperate to form a bidirectional locking snap-fit ​​connection.

[0014] The first housing component has a first upper guide rail and a first lower guide rail arranged in parallel on its mating end face. The first upper guide rail and the first lower guide rail are respectively equipped with two sliding first limiting components. The first semi-enclosed cavity is located in the area between the first upper guide rail and the first lower guide rail.

[0015] The mating end face of the second housing component is provided with a second upper guide rail and a second lower guide rail arranged in parallel. The second upper guide rail and the second lower guide rail are respectively provided with two sliding second limiting components. The first limiting component and the second limiting component are detachably connected. The second semi-enclosed cavity is provided in the area between the second upper guide rail and the second lower guide rail, and an opening area is formed in the lower half of the mating end face.

[0016] The first limiting component and the second limiting component are respectively fixed to the first upper guide rail / first lower guide rail and the second upper guide rail / second lower guide rail by locking structures.

[0017] Both the first housing component and the second housing component are made of polytetrafluoroethylene (Teflon). Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1This is a first-view structural schematic diagram of a busbar protective sleeve according to Embodiment 1 of this utility model.

[0020] Figure 2 This is a schematic diagram of the assembly structure of a busbar protective sleeve according to Embodiment 1 of this utility model from a first-view perspective.

[0021] Figure 3 This is a structural schematic diagram of a busbar protective sleeve from a second perspective, according to Embodiment 1 of this utility model.

[0022] Figure 4 This is a schematic diagram of the assembly structure of a busbar protective sleeve from a second perspective, according to Embodiment 1 of this utility model.

[0023] Figure 5 This is a schematic diagram of the protective sleeve provided in Embodiment 1 of this utility model being fitted onto the busbar.

[0024] Reference numerals: 1. First housing component; 101. First semi-enclosed cavity; 102. First limiting boss; 2. Second housing component; 201. Second semi-enclosed cavity; 202. Second limiting boss; 3. Metal shaft; 4. Busbar. Detailed Implementation

[0025] The technical solutions in specific embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. 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] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0027] Example 1

[0028] In this embodiment of the utility model, in conjunction with reference to the reference Figures 1 to 5 As shown, a busbar protective sleeve is provided for covering the conductive metal shaft 3 of a busbar 4. The protective sleeve includes an insulating body assembly, specifically composed of a first housing component 1 and a second housing component 2. The first housing component 1 and the second housing component 2 are interlocked to form a detachable connection, facilitating installation and disassembly. When the first housing component 1 and the second housing component 2 are connected, they together form a covering cavity for enclosing the metal shaft 3. The shape and size of this covering cavity are adapted to the outer surface contour of the conductive metal shaft 3 of the busbar 4, allowing for a tight fit to the metal shaft 3, thereby providing reliable insulation protection for the busbar 4.

[0029] In this embodiment, the first housing component 1 is provided with a first semi-enclosing cavity 101 that matches the outer surface contour of the metal shaft 3. The first semi-enclosing cavity 101 extends laterally and is used to partially enclose the metal shaft 3. The four corners of the mating end face of the first housing component 1 are respectively provided with first limiting bosses 102 of equal height. The first semi-enclosing cavity 101 is located between adjacent first limiting bosses 102, and the first limiting bosses 102 limit and support the metal shaft 3. The second housing component 2 consists of two symmetrically arranged split parts. The mating end face of each split part is provided with two second limiting bosses 202 in the vertical direction. The second limiting bosses 202 match the first limiting bosses 102 and are used for positioning and limiting when the first housing component 1 and the second housing component 2 are connected. The second semi-enclosing cavity 201 of each split part extends laterally, is located between adjacent second limiting bosses 202, and forms a complementary fit with the first semi-enclosing cavity 101.

[0030] The vertical heights of both the first limiting boss 102 and the second limiting boss 202 are less than the gap value after the busbar 4 and the metal shaft 3 are assembled. This design ensures that the limiting bosses will not interfere with the busbar 4 or other components in the assembled state, while providing stable support and limiting function for the metal shaft 3. When the first housing component 1 and the second housing component 2 are connected, the first semi-enclosed cavity 101 and the second semi-enclosed cavity 201 together form a complete enclosed cavity. This enclosed cavity fits tightly against the outer surface of the metal shaft 3, effectively isolating the metal shaft 3 from the influence of the external environment, thereby achieving insulation protection for the busbar 4.

[0031] In other embodiments, the second housing component 2 can also be a single piece. The four corners of the mating end face of the second housing component 2 are provided with second limiting bosses 202 that match the first limiting bosses 102, and the second semi-enclosing cavity 201 extends laterally between the second limiting bosses 202. To accommodate the wiring connected to the metal shaft 3, the lower half of its mating end face of the second housing component 2 has an opening area for accommodating the wiring. This design not only ensures that the enclosing cavity can tightly wrap around the metal shaft 3, but also facilitates the connection of the wiring, further improving the applicability and flexibility of the protective sleeve.

[0032] The interlocking connection structure includes a snap-fit ​​groove disposed on the mating surface of the first limiting boss 102 and a snap-fit ​​block disposed on the mating surface of the second limiting boss 202. The snap-fit ​​groove and the snap-fit ​​block cooperate to form a bidirectional locking snap-fit ​​connection. This structural design ensures that the first housing component 1 and the second housing component 2 can achieve stable locking after connection, while facilitating quick assembly and disassembly. In this embodiment, both the first housing component 1 and the second housing component 2 are made of polytetrafluoroethylene (Teflon). Polytetrafluoroethylene has excellent insulation properties, chemical corrosion resistance, and a low coefficient of friction, which can effectively prevent short circuits caused by tin whisker growth, while providing reliable insulation protection for the busbar 4. In addition, this material also has good mechanical properties and temperature resistance, and can maintain stable performance in complex operating environments.

[0033] Example 2

[0034] A busbar protective sleeve is provided, differing from Embodiment 1 in that, in this embodiment, the mating end face of the first housing component is provided with parallel upper and lower guide rails, and two slidable first limiting components are respectively disposed on the upper and lower guide rails. A first semi-enclosing cavity is disposed in the area between the upper and lower guide rails. The mating end face of the second housing component is correspondingly provided with parallel second upper and second lower guide rails, and two slidable second limiting components are respectively disposed on the second upper and lower guide rails. A second semi-enclosing cavity is disposed in the area between the second upper and second lower guide rails.

[0035] The first and second limiting components form a detachable connection, allowing for quick positioning and fixation of the first and second housing components during assembly, while facilitating disassembly and maintenance when needed. The first and second limiting components are respectively fixed to the first upper / lower guide rail or the second upper / lower guide rail via locking structures. This design, through the sliding limiting components and guide rail structure, allows for position adjustment of the limiting components, thus better accommodating busbar metal shafts of different sizes. The open area design also facilitates wiring connections. Furthermore, the lower half of the mating end face of the second housing component forms an open area to accommodate wiring connected to the metal shaft.

[0036] This invention provides a tightly fitting enclosure for the conductive metal shaft 3 through a meticulously designed busbar protective sleeve. The first housing component 1 and the second housing component 2 are tightly fitted together via an interlocking connection structure, forming a complete enclosure cavity whose shape and size are adapted to the outer surface contour of the metal shaft 3, effectively isolating the metal shaft 3 from the influence of the external environment. This design not only reduces the risk of short circuits caused by excessive gaps in traditional partition solutions, but also further prevents short circuits caused by tin whisker growth through the excellent insulation properties of polytetrafluoroethylene (Teflon) material, significantly improving the insulation protection effect of the busbar 4. Furthermore, the vertical heights of the first limiting boss 102 and the second limiting boss 202 are both less than the gap value after the busbar 4 and the metal shaft 3 are assembled, ensuring that the limiting bosses will not interfere with other components in the assembled state, while providing stable support and limiting for the metal shaft 3, further enhancing the stability and reliability of the protective sleeve.

[0037] The busbar protective sleeve features a unique detachable connection design, allowing for quick positioning and fixation of the first housing component 1 and the second housing component 2, while facilitating disassembly and maintenance when needed. This design not only improves installation efficiency but also enhances the flexibility and adaptability of the protective sleeve in different usage scenarios. In Embodiment 2, the position adjustment of the limiting component is achieved through a sliding limiting component and guide rail structure, better accommodating busbar metal shafts of different sizes. Furthermore, the lower half of the mating end face of the second housing component 2 has an opening area to accommodate the wiring connected to the metal shaft 3, further improving the applicability and flexibility of the protective sleeve and avoiding the problem of traditional partitions falling off due to collisions, causing the isolation effect to fail.

[0038] It should be noted that, for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the scope of protection of the claims of this utility model.

Claims

1. A busbar protective sleeve, characterized in that, The conductive metal shaft (3) used to cover the busbar (4) includes: An insulating body assembly, the insulating body assembly including a first housing component (1) and a second housing component (2), the first housing component (1) and the second housing component (2) being detachably connected by an interlocking connection structure; After the first housing component (1) is connected to the second housing component (2), a covering cavity is formed for wrapping the metal shaft (3).

2. The protective sleeve according to claim 1, characterized in that, The first housing component (1) is provided with a first semi-enclosed cavity (101) that is adapted to the outer surface contour of the metal shaft (3), and the second housing component (2) is provided with a second semi-enclosed cavity (201) that is connected to the first semi-enclosed cavity (101) to form a complementary fit.

3. The protective sleeve according to claim 2, characterized in that, The first housing component (1) has first limiting bosses (102) of equal height at the four corners of the mating end face, and the first semi-enclosed cavity (101) extends laterally between the first limiting bosses (102).

4. The protective sleeve according to claim 3, characterized in that, The second housing component (2) consists of two symmetrically arranged split parts. Each split part has two second limiting bosses (202) on its mating end face along the vertical direction. The second limiting bosses (202) match the first limiting bosses (102). The second semi-enclosed cavity (201) extends laterally between the second limiting bosses (202).

5. The protective sleeve according to claim 4, characterized in that, The vertical height of the first limiting boss (102) and the second limiting boss (202) is less than the gap value after the busbar (4) and the metal shaft (3) are assembled.

6. The protective sleeve according to claim 4, characterized in that, The interlocking connection structure includes a snap-fit ​​groove disposed on the mating surface of the first limiting boss (102) and a snap-fit ​​block disposed on the mating surface of the second limiting boss (202). The snap-fit ​​groove and the snap-fit ​​block cooperate to form a bidirectional locking snap-fit ​​connection.

7. The protective sleeve according to claim 2, characterized in that, The first housing component (1) has a first upper guide rail and a first lower guide rail arranged in parallel on its mating end face. The first upper guide rail and the first lower guide rail are respectively equipped with two sliding first limiting components. The first semi-enclosed cavity (101) is located in the area between the first upper guide rail and the first lower guide rail.

8. The protective sleeve according to claim 7, characterized in that, The mating end face of the second housing component (2) is provided with a second upper guide rail and a second lower guide rail arranged in parallel. The second upper guide rail and the second lower guide rail are respectively provided with two sliding second limiting components. The first limiting component and the second limiting component are detachably connected. The second semi-enclosed cavity (201) is located in the area between the second upper guide rail and the second lower guide rail, and an opening area is formed in the lower half of the mating end face.

9. The protective sleeve according to claim 8, characterized in that, The first limiting component and the second limiting component are respectively fixed to the first upper guide rail / first lower guide rail and the second upper guide rail / second lower guide rail by locking structures.

10. The protective sleeve according to claim 2, characterized in that, Both the first housing component (1) and the second housing component (2) are made of polytetrafluoroethylene (Teflon).

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