A mounting structure of a fuse for facilitating welding

Abstract

This utility model relates to an easy-to-weld installation structure for a fuse, belonging to the field of electrical equipment protection. It includes a fuse body, connecting contacts located on both sides of the fuse body, and a copper busbar for mounting the fuse body. The connecting contacts are provided with pre-installed components that directly contact the copper busbar. The connecting contacts and the copper busbar are directly in contact and fixed together by welding. This application effectively reduces unstable contact resistance caused by insufficient connection.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment protection, and in particular to an installation structure for fuses that is easy to weld. Background Technology

[0002] A fuse is a commonly used electrical protection device, primarily used to protect the safe operation of automotive electrical equipment in the event of circuit overload or short circuit. As a major component of the battery drive unit in new energy vehicles, it also accounts for a significant portion of the unit's cost.

[0003] In the existing technology, the common method of installing fuses is to connect them with bolts. After the fuse is connected to the copper busbar, it is then fixed to the BDU base with embedded nuts by bolts to ensure the installation of the fuse.

[0004] The connection between the copper busbar and the base is achieved by tightening bolts. If foreign objects are present or the bolts are too long during installation, the connection between the fuse and the copper busbar may not be tight, resulting in increased contact resistance and affecting the overall temperature rise. There is still room for improvement. Summary of the Invention

[0005] To reduce the instability of contact resistance caused by insufficient connection, this utility model provides an installation structure for fuses that is easy to weld.

[0006] This utility model provides an easy-to-weld installation structure for fuses, using the following technical solution:

[0007] An easy-to-weld installation structure for a fuse includes a fuse body, connecting contacts located on both sides of the fuse body, and a copper busbar for mounting the fuse body. The connecting contacts are provided with pre-installed parts, which are in direct contact with the copper busbar. The connecting contacts are in direct contact with the copper busbar and are fixed to the copper busbar by welding.

[0008] By adopting the above technical solution, the connecting contact head and the pre-installed part on the contact head on the fuse body are directly in contact with the copper busbar. The pre-installed part improves the fixation between the connecting contact head and the copper busbar. Then, the connecting contact head, the pre-installed part and the copper busbar are welded and fixed to improve the contact between the connecting contact head and the copper busbar and improve the tightness of the connection.

[0009] Optionally, the connecting contact is L-shaped, and a locking block is provided on the side of the connecting contact away from the fuse body, and a locking groove is provided on the copper busbar for the locking block to engage.

[0010] By adopting the above technical solution, the connecting contact is arranged in an L-shape, and a snap-fit ​​block is provided on one side of the connecting contact. The snap-fit ​​block snaps and fixes in the snap-fit ​​groove, thereby fixing the connecting contact on the copper busbar. The snap-fit ​​block also improves the ease of installation.

[0011] Optionally, the snap-fit ​​block is provided with a deformation strip, which is used to synchronously fix the snap-fit ​​block in the snap-fit ​​groove.

[0012] By adopting the above technical solution, a deformation strip is set on the snap-fit ​​block. When the snap-fit ​​block is snapped into the snap-fit ​​groove, the deformation strip deforms in the direction of the snap-fit ​​block. When the snap-fit ​​block is snapped into the snap-fit ​​groove, the deformation strip expands to fix the snap-fit ​​block in the snap-fit ​​groove, thereby improving the fixation of the snap-fit ​​block.

[0013] Optionally, the snap-fit ​​block has a deformation groove for partially embedding and partially exposing the deformation strip.

[0014] By adopting the above technical solution, when the deformation strip is inserted into the snap-fit ​​groove, it moves towards the snap-fit ​​block and partially snaps into the deformation groove. This allows the excess deformation strip to be snapped into the deformation groove when the deformation strip is snapped into the snap-fit ​​groove, thereby improving the tightness of the connection between the deformation strip and the snap-fit ​​block.

[0015] Optionally, the deformable strip is provided with a snap-fit ​​piece for snapping with the copper busbar on the side away from the snap-fit ​​block, and the copper busbar is provided with a fixing groove for snapping with the snap-fit ​​piece, and the fixing groove and the snap-fit ​​groove are interconnected.

[0016] By adopting the above technical solution, a snap-fit ​​piece is provided on the side of the deformation strip away from the snap-fit ​​block. After the snap-fit ​​block is inserted into the snap-fit ​​groove, the snap-fit ​​piece snaps into the snap-fit ​​groove of the copper busbar. This further improves the stability of the snap-fit ​​block in the snap-fit ​​groove and reduces the possibility of the snap-fit ​​block coming out of the snap-fit ​​groove.

[0017] Optionally, a positioning block is provided at the connection between the deformation strip and the snap-fit ​​block. The positioning block passes through the snap-fit ​​groove and abuts against the copper busbar. The connecting head, the positioning block and the copper busbar are fixed by welding.

[0018] By adopting the above technical solution, a positioning block is provided at the connection between the deformation strip and the snap-fit ​​block. After the snap-fit ​​block is inserted into the snap-fit ​​groove, the positioning block abuts against the copper busbar. After abutting, the connecting contact head, the positioning block and the copper busbar are welded and fixed. By the positioning block abutting against the copper busbar, the contact area between the connecting contact head and the copper busbar is increased, and the fixation between the connecting contact head and the copper busbar is improved.

[0019] Optionally, the connecting contact head is planar, and an expansion piece is provided on the connecting contact head. The expansion piece is attached to the copper busbar, and the connecting contact head, the expansion piece, and the copper busbar are fixed by welding.

[0020] By adopting the above technical solution, an expansion piece is provided on the flat connecting contact. During welding, the expansion piece, copper busbar, and connecting contact are connected together to fix the connecting contact on the copper busbar. The expansion piece increases the contact area between the copper busbar and the connecting contact during welding, so that the connecting contact and the copper busbar can make full contact and improve the stability of the resistance.

[0021] Optionally, the connecting contact head is provided with a positioning groove for partial installation of the expansion piece.

[0022] By adopting the above technical solution, a positioning groove is provided on the connecting contact head for the installation of the expansion piece. The expansion piece is installed into the positioning groove, thereby increasing the contact area between the expansion piece and the connecting contact head. The positioning groove is used to fix the expansion piece, thus fixing the expansion piece on the connecting contact head.

[0023] Optionally, the expansion chip is integrally provided with a connecting wire, and the connecting contact head is provided with a wire groove for the connecting wire to be embedded.

[0024] By adopting the above technical solution, a connecting wire is provided on the expansion piece, and the connecting wire is embedded in the wire groove. After embedding, the connecting contact is fixed, thereby improving the fixing stability of the expansion piece on the connecting contact by embedding the connecting wire in the wire groove.

[0025] Optionally, a circular piece is provided on the side of the connecting line away from the expansion piece, and a circular groove is provided on the connecting contact head for the circular piece to be inserted.

[0026] By adopting the above technical solution, a circular piece is provided on the side of the connecting line away from the expansion piece. The circular piece is inserted into the circular groove of the connecting head. The connecting line is fixed by the circular groove to fix the expansion piece. Thus, by inserting the circular piece into the circular groove, the expansion piece is clamped and fixed in the positioning groove, thereby improving the fixation of the expansion piece.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The connecting contact, pre-assembled parts and copper busbar are welded and fixed together to improve the contact between the connecting contact and the copper busbar and improve the tightness of the connection;

[0029] 2. The deformation strip deforms towards the snap-fit ​​block, and resets to open up when the snap-fit ​​block is snapped into the snap-fit ​​groove, so as to fix the snap-fit ​​block in the snap-fit ​​groove and improve the fixation of the snap-fit ​​block;

[0030] 3. By using an expansion piece during welding, the contact area between the copper busbar and the connecting contact is increased, so that the connecting contact and the copper busbar can make full contact and improve the stability of the resistance. Attached Figure Description

[0031] Figure 1This is a schematic diagram of a fuse mounting structure that facilitates welding. Figure 1 ;

[0032] Figure 2 This is a partial illustration of the pre-assembled components. Figure 1 ;

[0033] Figure 3 This is a schematic diagram of a fuse mounting structure that facilitates welding. Figure 2 ;

[0034] Figure 4 This is a partial illustration of the pre-assembled components. Figure 2 .

[0035] The parts referred to by the numbers in the above attached figures are as follows: 1. Fuse body; 2. Connecting contact; 3. Copper busbar; 4. Pre-assembled part; 5. Snap-fit ​​block; 6. Snap-fit ​​groove; 7. Deformation strip; 8. Deformation groove; 9. Snap-fit ​​piece; 10. Fixing groove; 11. Positioning block; 12. Expansion piece; 13. Positioning groove; 14. Connecting wire; 15. Wire groove; 16. Circular piece; 17. Circular groove. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Example 1

[0037] Reference Figure 1 This application discloses an installation structure for a fuse that is easy to weld, including a fuse body 1, a connecting contact head 2, a pre-installed component 4, a snap-fit ​​block 5, and a copper busbar 3.

[0038] The fuse body 1 is the fuse. The connecting contact 2 is integrally formed on both sides of the fuse body 1 in the axial direction. In this embodiment, the connecting contact 2 is L-shaped and bent downward. The connecting contact 2 is used to fix the copper busbar 3. A snap-fit ​​block 5 is integrally formed on the side of the connecting contact 2 near the copper busbar 3. The snap-fit ​​block 5 is located at the center of the connecting contact 2. A snap-fit ​​groove 6 is opened on the copper busbar 3 for the snap-fit ​​block 5 to be inserted and snapped. The pre-installed parts 4 are installed on both sides of the snap-fit ​​block 5 in the width direction. When the snap-fit ​​block 5 is snapped into the snap-fit ​​groove 6, it is snapped and fixed by the pre-installed parts 4.

[0039] refer to Figure 2 In Example 1, the pre-assembled component 4 includes a deformation strip 7, a snap-fit ​​piece 9, and a positioning block 11. The deformation strip 7 is welded and fixed to both sides of the snap-fit ​​block 5, that is, the deformation strip 7 is symmetrically arranged.

[0040] A deformation groove 8 is provided on the snap-fit ​​block 5 for the deformation strip 7 to snap into. When the deformation strip 7 is inserted into the snap-fit ​​groove 6, the part of the deformation strip 7 near the snap-fit ​​block 5 snaps into the deformation groove 8.

[0041] The deformable strip 7 has an integrally formed snap-fit ​​piece 9 on the side away from the snap-fit ​​block 5. The snap-fit ​​piece 9 snaps with the copper busbar 3 when the snap-fit ​​block 5 is inserted into the snap-fit ​​groove 6. A fixing groove 10 is provided on the copper busbar 3 for the snap-fit ​​piece 9 to snap into, and the fixing groove 10 and the snap-fit ​​groove 6 are interconnected.

[0042] The bottom of the deformable strip 7 and the snap-fit ​​block 5 is integrally formed with a positioning block 11. After the deformable strip 7 is snapped into the snap-fit ​​groove 6, the positioning block 11 is attached to the side of the copper busbar 3 that is close to the ground. After the positioning block 11 is fixed, the snap-fit ​​block 5 is fixed on the copper busbar 3 by spot welding the positioning block 11, and the connecting contact 2 is further fixed on the copper busbar 3.

[0043] Working principle: Insert the snap-fit ​​block 5 with the deformation strip 7 into the snap-fit ​​groove 6 of the copper busbar 3. The deformation strip 7 will be squeezed towards the snap-fit ​​block 5, so that part of the deformation strip 7 will snap into the deformation groove 8. The snap-fit ​​is completed when the snap-fit ​​piece 9 snaps into the fixing groove 10. At this time, the positioning block 11 contacts the surface of the copper busbar 3, fixing the connecting contact 2 with the snap-fit ​​block 5 in the copper busbar 3. Finally, welding is performed to fix it. Example 2

[0044] The difference from Embodiment 1 is that the connecting contact 2 in Embodiment 1 is L-shaped and bent downwards, while the connecting contact 2 in Embodiment 2 is planar. The corresponding pre-assembly component 4 is also changed. (Refer to...) Figure 3 This application discloses an installation structure for a fuse that is easy to weld, including a fuse body 1, a connecting contact 2, a pre-assembled part 4, and a copper busbar 3.

[0045] The connecting contact 2 is integrally formed on both sides of the fuse body 1 in the axial direction. In this embodiment, the connecting contact 2 is set in a plane and is used to fit with the copper busbar 3. That is, the connecting contact 2 and the copper busbar 3 are set in parallel. In this embodiment, the pre-installed part 4 is installed around the connecting contact 2. Except for the side of the connecting contact 2 that contacts the fuse body 1, the pre-installed part 4 is installed on the other three sides.

[0046] During installation, the pre-installed part 4 and the connecting contact 2 are attached to the copper busbar 3, and the three sides of the connecting contact 2 with the pre-installed part 4 are welded to fix the connecting contact 2 to the copper busbar 3.

[0047] refer to Figure 4 In embodiment 2, the pre-assembled component 4 includes an expansion piece 12, a connecting wire 14, and a disc 16. The expansion piece 12 is snapped and fixed on the connecting contact head 2. The connecting contact head 2 has a positioning groove 13 on the side near the copper busbar 3 for the expansion piece 12 to snap into. The expansion piece 12 is partially interference-fitted with the positioning groove 13 to snap the expansion piece 12 into the positioning groove 13.

[0048] A connecting wire 14 is integrally formed on the side of the expansion piece 12 near the connecting contact head 2, and a circular piece 16 is integrally formed on the side of the connecting wire 14 away from the expansion piece 12. A circular groove 17 for mounting the circular piece 16 and a wire groove 15 for embedding the connecting wire 14 to fix the connecting wire 14 are provided on the side of the connecting contact head 2 near the copper busbar 3.

[0049] Working principle: First, insert the disc 16 into the circular groove 17 of the connecting contact 2 with an interference fit, and then embed the connecting wire 14 into the wire groove 15 of the connecting contact 2. After embedding, insert the expansion piece 12 into the positioning groove 13 of the connecting contact 2. After installation, place the connecting contact 2 with the expansion piece 12 flat on the copper busbar 3, and weld the three sides of the connecting contact 2 with the expansion piece 12 to fix the connecting contact 2 to the copper busbar 3 so that the connecting contact 2 can fully contact the copper busbar 3.

[0050] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A welding-friendly mounting structure for a fuse, comprising a fuse body (1), connecting contacts (2) located on both sides of the fuse body (1), and copper busbars (3) for mounting the fuse body (1), characterized in that, The connecting contact (2) is provided with a pre-installed component (4), which is in direct contact with the copper busbar (3). The connecting contact (2) is in direct contact with the copper busbar (3), and the connecting contact (2) and the copper busbar (3) are fixed by welding.

2. The welding-friendly installation structure for a fuse according to claim 1, characterized in that, The connecting contact (2) is L-shaped, and a snap-fit ​​block (5) is provided on the side of the connecting contact (2) away from the fuse body (1). A snap-fit ​​groove (6) is provided on the copper busbar (3) for the snap-fit ​​block (5) to snap into.

3. The welding-friendly installation structure for a fuse according to claim 2, characterized in that, The snap-fit ​​block (5) is provided with a deformation strip (7), which is used to allow the snap-fit ​​block (5) to be synchronously fixed in the snap-fit ​​groove (6).

4. The welding-friendly installation structure for a fuse according to claim 3, characterized in that, The snap-fit ​​block (5) has a deformation groove (8) for the deformation strip (7) to be partially embedded and partially exposed.

5. The welding-friendly installation structure for a fuse according to claim 4, characterized in that, The deformable strip (7) is provided with a snap-fit ​​piece (9) for snapping with the copper busbar (3) on the side away from the snap-fit ​​block (5). The copper busbar (3) is provided with a fixing groove (10) for snapping with the snap-fit ​​piece (9). The fixing groove (10) and the snap-fit ​​groove (6) penetrate each other.

6. The welding-friendly installation structure for a fuse according to claim 5, characterized in that, A positioning block (11) is provided at the connection between the deformation strip (7) and the snap-fit ​​block (5). The positioning block (11) passes through the snap-fit ​​groove (6) and then abuts against the copper busbar (3). The connecting head (2), the positioning block (11) and the copper busbar (3) are fixed by welding.

7. The welding-friendly installation structure for a fuse according to claim 1, characterized in that, The connecting contact (2) is arranged in a plane, and an expansion piece (12) is provided on the connecting contact (2). The expansion piece (12) is attached to the copper busbar (3), and the connecting contact (2), the expansion piece (12) and the copper busbar (3) are fixed by welding.

8. The welding-friendly installation structure for a fuse according to claim 7, characterized in that, The connecting contact (2) has a positioning groove (13) for the partial installation of the expansion piece (12).

9. The welding-friendly installation structure for a fuse according to claim 8, characterized in that, The expansion plate (12) is integrally provided with a connecting line (14), and the connecting contact (2) is provided with a groove (15) for the connecting line (14) to be embedded.

10. The welding-friendly installation structure for a fuse according to claim 9, characterized in that, A circular piece (16) is provided on the side of the connecting line (14) away from the expansion piece (12), and a circular groove (17) is provided on the connecting contact (2) for the circular piece (16) to be inserted.

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