Overload protective tube for new energy automobile battery pack

Abstract

The utility model relates to the technical field of overload protective tubes, in particular to an overload protective tube for a new energy automobile battery pack, which comprises a protective tube main body and a fuse box, metal conductive sleeves are respectively sleeved at two ends of the protective tube main body, and positioning sleeves are respectively sleeved on the metal conductive sleeves at two ends of the protective tube main body in a sliding manner. A locking ring is arranged outside the positioning sleeve in a sleeving manner, two positioning pieces are arranged on the two sides of the inner side of the locking ring respectively, the conical ends of the two positioning pieces penetrate through the positioning sleeve and are inserted into the metal conductive sleeve, and shaft positioning grooves allowing the positioning end columns to be embedded are inwards formed in the outer end faces, located on the two sides, of the positioning sleeve respectively. According to the overload protective tube structure provided by the utility model, the locking ring can fix the positioning sleeve at the end parts of the overload protective tubes with different lengths and dimensions, so that the protective tubes with various specifications can be filled into the fuse box, and the fuse box is produced in a standardized manner, so that the assembly efficiency can be improved, and the production cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of overload fuse technology, and in particular to an overload fuse for new energy vehicle battery packs. Background Technology

[0002] Automotive fuses are typically located in fuse boxes, which are usually installed in the engine compartment or passenger compartment of a vehicle. Overload fuses in new energy vehicles generally use ceramic fuses, which protect the circuit by melting the fuse wire when a short circuit occurs.

[0003] Existing ceramic fuses come in various lengths. However, due to the lack of suitable locking fixtures, fuse boxes cannot be universally used with all types of fuses during installation. Therefore, fuses and fuse boxes need to be manufactured in a matching manner, which increases production costs and is not conducive to improving economic efficiency. To address this issue, an overload fuse for new energy vehicle battery packs is proposed. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an overload fuse for new energy vehicle battery packs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An overload fuse for a new energy vehicle battery pack includes a fuse body and a fuse box. The fuse body is built into the fuse box. Metal conductive sleeves are respectively sleeved at both ends of the fuse body. Positioning sleeves are slidably sleeved on the metal conductive sleeves at both ends of the fuse body. A locking ring is sleeved on the outside of the positioning sleeve. Two symmetrically arranged positioning pieces are respectively provided on the inner two sides of the locking ring. The conical ends of the two positioning pieces penetrate the positioning sleeves and are inserted into the metal conductive sleeves.

[0007] In a preferred embodiment, the locking ring has protrusions on both symmetrical sides of its ring body, and the inner side of each protrusion has a mounting cavity for two positioning pieces to be fitted.

[0008] In a preferred embodiment, the positioning piece is a hook-shaped sheet, with two positioning pieces arranged opposite each other, and the tails of both positioning pieces are fixedly disposed in the mounting cavity, while the conical ends of the heads of both positioning pieces extend outward from the mounting cavity.

[0009] In a preferred embodiment, the positioning sleeve has through holes symmetrically located on both sides of its tube wall for inserting the conical end of the positioning piece.

[0010] In a preferred embodiment, the metal conductive sleeve has a row of sequentially spaced positioning holes symmetrically distributed on both sides of its tube wall, and the conical end of the positioning piece is inserted into the corresponding positioning hole.

[0011] The inner surface of the two end plates of the safety box is provided with positioning end posts at the center, and the outer end face of the positioning sleeve on both sides is provided with shaft positioning grooves for the positioning end posts to be inserted.

[0012] In a preferred embodiment, the end face of the positioning post facing the fuse body is chamfered, and the contour of the shaft positioning groove is designed to fit the shape of the positioning post.

[0013] The beneficial effects of this utility model are:

[0014] The overload fuse structure proposed in this solution solves the problem of increased production costs caused by the need for fuses to be assembled with fuse boxes due to differences in fuse length. The locking ring can fix the positioning sleeve to the end of overload fuses of different lengths, ensuring that fuses of various specifications can be filled into the fuse box. Standardized production of fuse boxes can improve assembly efficiency and reduce production costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overload fuse in its assembled state according to the present invention;

[0016] Figure 2 This is a schematic diagram of the mounting box proposed in this utility model;

[0017] Figure 3 This is a schematic diagram of the assembly of the fuse and positioning sleeve proposed in this utility model.

[0018] Figure 4 This is a structural diagram of the positioning sleeve and locking ring in the assembly state proposed in this utility model.

[0019] Figure 5 This is a schematic diagram of the positioning piece inside the locking ring proposed in this utility model.

[0020] In the diagram: 1. Fuse box; 2. Fuse body; 3. Positioning sleeve; 4. Locking ring; 41. Protrusion; 42. Resettling cavity; 5. Positioning end post; 6. Metal conductive sleeve; 7. Positioning hole; 8. Shaft positioning groove; 9. Through hole; 10. Positioning plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] In this embodiment, refer to Figure 1-5 An overload fuse for a new energy vehicle battery pack includes a fuse body 2 and a fuse box 1. The fuse body 2 is built into the fuse box 1, and metal conductive sleeves 6 are fixedly sleeved at both ends of the fuse body 2.

[0023] Positioning sleeves 3 are slidably fitted onto the metal conductive sleeves 6 at both ends of the fuse body 2. Locking rings 4 are fitted onto the outside of the positioning sleeves 3. Two symmetrically arranged positioning pieces 10 are respectively arranged on the inner sides of the locking rings 4. The conical ends of both positioning pieces 10 penetrate the positioning sleeves 3 and are inserted into the metal conductive sleeves 6. (See attached...) Figure 3 - Appendix Figure 5 As shown, the locking ring 4 has protrusions 41 on both sides of its ring body, and the inner side of each protrusion 41 has a mounting cavity 42 for the two positioning pieces 10 to be installed.

[0024] It needs to be specifically noted, in conjunction with the appendix Figure 5 It can be seen that the positioning piece 10 is a hook-shaped sheet, the two positioning pieces 10 are arranged opposite each other, and the tails of the two positioning pieces 10 are fixedly set in the mounting cavity 42, and the conical ends of the heads of the two positioning pieces 10 extend outward from the mounting cavity 42.

[0025] From the appendix Figure 4 Or attached Figure 5 It can be seen that the positioning sleeve 3 has through holes 9 symmetrically located on both sides of its wall surface for inserting the conical end of the positioning piece 10. Furthermore, from the attached... Figure 3 As can be seen, a row of positioning holes 7 are symmetrically distributed along the axial direction on both sides of the metal conductive sleeve 6, and the conical end of the positioning piece 10 is inserted into the corresponding positioning hole 7.

[0026] The position of the through hole 9 on the positioning sleeve 3 is aligned with the position of the positioning hole 7 on the metal conductive sleeve 6, which ensures that the conical ends of the two positioning pieces 10 on the same side can pass smoothly through the through hole 9 and be inserted into the positioning hole 7.

[0027] Positioning end posts 5 are respectively provided at the center of the inner surface of the two end plates of the fuse box 1. The outer end faces of the positioning sleeves 3 on both sides are opened inward to form shaft positioning grooves 8 for the positioning end posts 5 to be inserted. The end face of the positioning end post 5 facing the fuse body 2 is chamfered, and the contour of the shaft positioning groove 8 is designed to fit the shape of the positioning end post 5.

[0028] The axial positioning groove 8 and the positioning end post 5 are inserted together, which can restrict the axial back-and-forth movement of the positioning sleeve 3 on the one hand, and will not affect the rotation of the positioning sleeve 3 on the other hand. When the fuse body 2 and the positioning sleeves 3 on both sides are installed in the fuse box 1, the positioning sleeves 3 at both ends can abut against the end plates on both sides of the fuse box 1, thereby ensuring that the position of the fuse body 2 is fixed and can be used for normal protection against overload of subsequent circuits.

[0029] For overload fuses of different lengths:

[0030] The operator places two positioning sleeves 3 onto the two metal conductive sleeves 6 on either side and slides them to the innermost part of the metal conductive sleeves 6. This is to provide maximum operating space for placing the fuse body 2 into the fuse box 1. Because the distance between the two positioning sleeves 3 on the left and right sides is the shortest, the distance between the positioning sleeves 3 and the positioning end post 5 is the farthest, allowing for the largest possible gap.

[0031] Then, based on the length of the fuse body 2, slide the two positioning sleeves 3 outward until the positioning sleeves 3 and the positioning end post 5 are inserted together. At this time, the fuse body 2 is completely embedded in the fuse box 1.

[0032] Finally, rotate the locking rings 4 on both sides to ensure that the positioning piece 10 inside the locking ring 4 can smoothly enter the through hole 9 and be inserted into the positioning hole 7 to complete the positioning of the fuse body 2. At this time, the positions of the positioning sleeves 3 on both sides and the fuse body 2 in the middle can be maintained and determined, and the positions of the two positioning sleeves 3 are restricted by the positioning end beads 5 on both sides, which can ultimately ensure the stability of the fuse body 2 and provide convenience for the protection of subsequent circuits.

[0033] 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. An overload fuse for a new energy vehicle battery pack, comprising a fuse body (2) and a fuse box (1), wherein the fuse body (2) is housed within the fuse box (1), and metal conductive sleeves (6) are respectively fitted onto both ends of the fuse body (2), characterized in that, Positioning sleeves (3) are slidably fitted on the metal conductive sleeves (6) at both ends of the fuse body (2). A locking ring (4) is fitted on the outside of the positioning sleeve (3). Two symmetrically arranged positioning pieces (10) are respectively provided on the inner sides of the locking ring (4). The conical ends of the two positioning pieces (10) penetrate the positioning sleeve (3) and are inserted into the metal conductive sleeve (6). Positioning end posts (5) are respectively provided at the center of the inner surface of the two end plates of the fuse box (1). The outer end faces of the positioning sleeves (3) on both sides are opened inward to form shaft positioning grooves (8) for the positioning end posts (5) to be embedded.

2. The overload fuse for a new energy vehicle battery pack according to claim 1, characterized in that, The locking ring (4) has protrusions (41) on both sides of its ring body, and the inner side of each protrusion (41) has a mounting cavity (42) for the two positioning pieces (10) to be installed.

3. An overload fuse for a new energy vehicle battery pack according to claim 2, characterized in that, The positioning piece (10) is a hook-shaped sheet. Two positioning pieces (10) are arranged opposite each other, and the tails of the two positioning pieces (10) are fixed in the mounting cavity (42). The conical ends of the heads of the two positioning pieces (10) extend outward from the mounting cavity (42).

4. An overload fuse for a new energy vehicle battery pack according to claim 3, characterized in that, The positioning sleeve (3) has through holes (9) symmetrically opened on both sides of its tube wall for the conical end of the positioning piece (10) to be inserted.

5. An overload fuse for a new energy vehicle battery pack according to claim 3, characterized in that, The metal conductive sleeve (6) has a row of positioning holes (7) arranged symmetrically along the axial direction on both sides of its tube wall, and the conical end of the positioning piece (10) is inserted into the corresponding positioning hole (7).

6. An overload fuse for a new energy vehicle battery pack according to claim 1, characterized in that, The end face of the positioning post (5) facing the fuse body (2) is chamfered, and the contour of the shaft positioning groove (8) is designed to match the shape of the positioning post (5).

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