Convex column type fuse

Abstract

The utility model relates to the technical field of fuses, and particularly discloses a convex column type fuse, which comprises a conductive assembly and an insulating shell, the conductive assembly comprises two connecting terminals and a melt electrically connected with the two connecting terminals. The ends, close to each other, of the two connecting terminals are provided with a plurality of positioning holes. The insulating shell wraps the melt and the positioning holes of the two connecting terminals. A positioning convex column inserted into the corresponding positioning hole is arranged at the position, corresponding to each positioning hole, of the insulating shell; the insulating shell is further provided with a plurality of limiting protruding columns, and each limiting protruding column abuts against the end faces, close to each other, of the two connecting terminals and is used for limiting the two connecting terminals to be close to each other. The convex column type fuse provided by the utility model can effectively solve the problem that the limitation between the connecting terminal and the insulating shell is easy to fail due to overlarge tightening force of the power connection bolt.

Description

Technical Field

[0001] The utility model relates to the technical field of fuses, in particular to a convex column type fuse. Background Art

[0002] The fuses each include an insulating shell, a first connecting terminal located at one end of the insulating shell, a second connecting terminal located at the other end of the insulating shell, and a fuse passing through the interior of the insulating shell and electrically connecting the two connecting terminals.

[0003] Generally, one end of the first connecting terminal and the second connecting terminal are fixed to the insulating shell by ultrasonic welding, and the other end is provided with a connection hole for the connection bolt to pass through. After the connection bolt is passed through the connection hole, the connection terminal is fixed in the circuit, and the fuse can be connected to the circuit.

[0004] In most cases, when tightening the power bolts, operators do not use tools such as torque wrenches that can quantify the torque. That is, operators mainly rely on feel to tighten the power bolts. In order to prevent the power bolts from loosening, most operators are accustomed to tightening the power bolts completely. Over-tightening the power bolts will cause a large degree of deformation of the connecting terminals, and the ultrasonic welding position is prone to loosening, eventually causing the connection terminal and the insulating shell to completely lose the limit, or even break the fuse, posing a great safety risk.

[0005] Therefore, it is necessary to improve the existing fuse to solve the problem that the limit between the connection terminal and the insulating housing is easily invalidated due to excessive tightening force of the power connection bolt.

[0006] The above information disclosed in this Background section is included only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form the prior art that is currently known to a person of ordinary skill in the art. Utility Model Content

[0007] One object of the present utility model is to provide a protruding column fuse that can effectively solve the problem that the limit between the connecting terminal and the insulating housing is easily invalidated due to excessive tightening force of the power connection bolt.

[0008] To achieve the above purpose, the utility model provides a protruding column fuse, comprising a conductive component and an insulating shell;

[0009] The conductive component includes two connecting terminals and a fuse electrically connecting the two connecting terminals; the ends of the two connecting terminals close to each other are each provided with a plurality of positioning holes, and the insulating shell covers the fuse and the positioning holes of the two connecting terminals;

[0010] The insulating housing is provided with a positioning protrusion at a position corresponding to each positioning hole and inserted into the corresponding positioning hole;

[0011] The insulating housing is further provided with a plurality of limiting protrusions, each of which abuts against the end faces of the two connecting terminals that are close to each other, so as to limit the two connecting terminals from approaching each other.

[0012] Optionally, the end surface area of ​​the positioning boss is smaller than the end surface area of ​​the limiting boss.

[0013] Optionally, the positioning boss is cylindrical, and the limiting boss is rectangular.

[0014] Optionally, an anti-pull bar is further provided on a side of the limiting boss away from the corresponding connecting terminal;

[0015] The middle position of the anti-pull barrier strip is connected to the melt and the connecting terminal, and an accommodating groove for accommodating the corresponding limiting protrusion is formed between the end position and the connecting terminal.

[0016] Optionally, the accommodating groove is an open groove with a U-shaped structure.

[0017] Optionally, the accommodating groove is a sealing groove with a rectangular structure.

[0018] Optionally, the melt is provided with a plurality of hollow holes.

[0019] Optionally, the insulating shell includes two oppositely arranged insulating half shells, one of the insulating half shells is provided with the positioning boss and the limiting boss.

[0020] Optionally, the two insulating half shells are fastened together by rivets.

[0021] Optionally, the connecting terminal is provided with a rivet hole for the rivet to pass through and a power connection hole for the power connection bolt to pass through.

[0022] The beneficial effects of the present invention are: providing a convex column type fuse, the positioning column is inserted into the positioning hole to realize the preliminary positioning between the connecting terminal and the insulating shell, and when the connecting bolt is tightened to cause a certain deformation of the connecting terminal, since the positioning column and the positioning hole are plugged in and unplugged, a certain relative movement can occur between the two, so there will be no problem of ultrasonic welding welds falling off and causing limit failure; further, each of the limiting protrusions abuts against the end faces of the two connecting terminals that are close to each other, and can further limit the two connecting terminals from approaching each other on the basis of the positioning protrusions, avoiding inward displacement of the connecting terminals when deformed and squeezing the melt to cause melt fracture, and a certain relative displacement can also occur between the limiting protrusion and the connecting terminal, and when the connecting bolt is tightened to cause the connecting terminal to be deformed, the end face of the connecting terminal will slide to a certain extent relative to the limiting protrusion, and there is no problem of forcibly pulling off the ultrasonic welding welds and causing limit failure.

[0023] Therefore, the protruding column fuse provided by the present invention can effectively solve the problem that the limit between the connecting terminal and the insulating housing is easily invalidated due to excessive tightening force of the power connection bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the assembly of a protruding column fuse provided in an embodiment;

[0026] Figure 2 A schematic diagram of a U-shaped receiving groove provided in an embodiment;

[0027] Figure 3 The embodiment provides a schematic diagram of a rectangular accommodating groove.

[0028] In the picture:

[0029] 1. Conductive component; 101. Connecting terminal; 1011. Positioning hole; 1012. Rivet hole; 1013. Power connection hole; 102. Melt; 1021. Hollow hole; 103. Anti-pull bar; 104. Accommodation groove;

[0030] 2. Insulating shell; 201. Insulating half shell; 2011. Positioning boss; 2012. Limiting boss. DETAILED DESCRIPTION

[0031] References to "embodiments" in this utility model mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the utility model. The appearance of the term "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or relevance to other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the various embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0032] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. The use of relevant terms herein is only for describing specific embodiments and is not intended to limit the present invention.

[0033] In the description of this utility model, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.

[0034] In the present invention, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0035] Without further restrictions, in the present invention, the words "include", "comprise", "have" or other similar expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0036] Consistent with the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple," such as "multiple groups" and "multiple times," are also understood in this manner, unless otherwise specifically defined.

[0037] In the description of the embodiments of the present invention, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present invention or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present invention.

[0038] Unless otherwise expressly specified or limited, in the description of the embodiments of the present invention, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the technical field of the present invention, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0039] The utility model provides a convex column type fuse, which is suitable for providing application scenarios such as overcurrent protection. It can effectively solve the problem that the limit between the connection terminal and the insulating shell is easily invalidated due to excessive tightening force of the power connection bolt.

[0040] See also Figure 1 The protruding column fuse provided in this embodiment includes a conductive component 1 and an insulating shell 2.

[0041] The conductive component 1 includes two connecting terminals 101 and a fuse 102 electrically connecting the two connecting terminals 101. The fuse 102 is provided with a plurality of hollow holes 1021, and the positions of the hollow holes 1021 are preset overcurrent fuse positions.

[0042] The adjacent ends of the two connecting terminals 101 are each provided with a plurality of positioning holes 1011. The insulating housing 2 comprises two opposing insulating half-shells 201 (one upper half and one lower half), which cooperate to cover the fuse 102 and the positioning holes 1011 of the two connecting terminals 101. The two insulating half-shells 201 are fastened together by rivets. Accordingly, the connecting terminals 101 are provided with rivet holes 1012 for the rivets to pass through and power connection holes 1013 for the power connection bolts to pass through.

[0043] One of the insulating half shells 201 (lower half shell) is provided with a positioning boss 2011 inserted into the corresponding positioning hole 1011 at a position corresponding to each positioning hole 1011; the insulating half shell 201 provided with the positioning boss 2011 is also provided with a plurality of limiting bosses 2012, each of the limiting bosses 2012 abuts against the end faces of the two connecting terminals 101 approaching each other, and is used to limit the two connecting terminals 101 from approaching each other.

[0044] In the convex column type fuse provided in this embodiment, the positioning column is inserted into the positioning hole 1011 to realize the preliminary positioning between the connecting terminal 101 and the insulating housing 2. When the connecting bolt is tightened to cause a certain deformation of the connecting terminal 101, a certain relative movement can occur between the positioning column and the positioning hole 1011 due to the plug-in connection between the positioning column and the positioning hole 1011. Therefore, the problem of the ultrasonic welding spot falling off and causing the limit failure will not occur. Furthermore, each of the limiting projections 2012 abuts against the end faces of the two connecting terminals 101 that are close to each other, which can On the basis of the positioning boss 2011, the two connecting terminals 101 are further restricted from approaching each other to prevent the connecting terminal 101 from displacing inward when deformed and squeezing the melt 102, causing the melt 102 to break. A certain relative displacement can also occur between the limiting boss 2012 and the connecting terminal 101. When the connecting terminal 101 is deformed by tightening the power bolt, the end face of the connecting terminal 101 will slide to a certain extent relative to the limiting boss 2012, and there is no problem of forcibly breaking the ultrasonic welding point to cause the limit failure.

[0045] Therefore, the protruding column fuse provided by the present invention can effectively solve the problem that the limit between the connecting terminal 101 and the insulating housing 2 is easily invalidated due to excessive tightening force of the power connection bolt.

[0046] In this embodiment, the end surface area of ​​the positioning protrusion 2011 is smaller than the end surface area of ​​the limiting protrusion 2012. The positioning protrusion 2011 needs to be inserted into the positioning hole 1011, which is provided on the connecting terminal 101. Due to the size limitation of the connecting terminal 101, the size of the positioning hole 1011 is relatively small, and therefore the size of the positioning protrusion 2011 is also relatively small. In order to avoid the structural strength of the positioning protrusion 2011 being insufficient, which would lead to a reduction in the limiting reliability between the connecting terminal 101 and the insulating housing 2, the limiting protrusion 2012 with a larger end surface area is provided for secondary limiting, thereby improving the limiting reliability between the connecting terminal 101 and the insulating housing 2.

[0047] Furthermore, the positioning boss 2011 is cylindrical, and the limiting boss 2012 is rectangular. The cylindrical positioning boss 2011 is easily inserted into the positioning hole 1011, reducing the difficulty of alignment; while the rectangular limiting boss 2012 provides a large and flat contact surface for the connecting terminal 101, thereby improving the reliability of the contact between the limiting boss 2012 and the connecting terminal 101.

[0048] Optionally, a pull-proof bar 103 is further provided on the side of the limiting protrusion 2012 away from the corresponding connecting terminal 101; the middle portion of the pull-proof bar 103 connects the fuse 102 and the connecting terminal 101, and a receiving groove 104 for accommodating the corresponding limiting protrusion 2012 is formed between the end portion and the connecting terminal 101. The pull-proof bar 103 can limit the two connecting terminals 101 from moving away from each other, thereby preventing the connecting terminal 101 from breaking the fuse 102 during deformation.

[0049] Optional, see Figure 2 , the accommodating groove 104 is an open groove of U-shaped structure; or, see Figure 3 The receiving groove 104 is a sealed groove with a rectangular structure. When the receiving groove 104 is a sealed groove, the connection reliability between the anti-pull barrier strip 103 and the connection terminal 101 is further improved.

[0050] In summary, the protruding column fuse provided in this embodiment has the following advantages:

[0051] ① Reliable limiting: Through the dual limiting effect of the positioning boss 2011 and the limiting boss 2012, the limiting failure problem caused by excessive tightening force of the power connection bolt is effectively solved, thereby improving the safety performance of the fuse.

[0052] ② Easy maintenance: Due to the design of the positioning boss 2011 and the limiting boss 2012, the connecting terminal 101 and the insulating housing 2 can be disassembled for maintenance, which reduces the difficulty of maintenance.

[0053] ③ Anti-pull-off protection: The optional anti-pull-off bar 103 design effectively prevents the connection terminal 101 from pulling off the fuse 102 during deformation, further improving the reliability of the fuse.

[0054] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A protruding column fuse, characterized in that: It comprises a conductive component (1) and an insulating shell (2); The conductive component (1) comprises two connecting terminals (101) and a melt (102) electrically connecting the two connecting terminals (101); the ends of the two connecting terminals (101) close to each other are each provided with a plurality of positioning holes (1011), and the insulating housing (2) covers the melt (102) and the positioning holes (1011) of the two connecting terminals (101); The insulating housing (2) is provided with a positioning boss (2011) at a position corresponding to each positioning hole (1011) and is inserted into the corresponding positioning hole (1011); The insulating housing (2) is further provided with a plurality of limiting protrusions (2012), each of the limiting protrusions (2012) abutting against the end faces of the two connecting terminals (101) that are close to each other, and is used to limit the two connecting terminals (101) from approaching each other.

2. The protruding column fuse according to claim 1, characterized in that: The end surface area of ​​the positioning boss (2011) is smaller than the end surface area of ​​the limiting boss (2012).

3. The protruding column fuse according to claim 2, characterized in that: The positioning boss (2011) is cylindrical, and the limiting boss (2012) is rectangular.

4. The protruding column fuse according to claim 1, characterized in that: An anti-pull barrier strip (103) is further provided on a side of the limiting boss (2012) away from the corresponding connecting terminal (101); The middle position of the anti-pull barrier strip (103) is connected to the melt (102) and the connection terminal (101), and an accommodating groove (104) for accommodating the corresponding limiting boss (2012) is formed between the end position and the connection terminal (101).

5. The post-type fuse according to claim 4, characterized in that: The accommodating groove (104) is an open groove with a U-shaped structure.

6. The post-type fuse according to claim 4, characterized in that: The accommodating groove (104) is a sealing groove with a rectangular structure.

7. The protruding column fuse according to claim 1, characterized in that: The melt (102) is provided with a plurality of hollow holes (1021).

8. The post fuse according to claim 1, wherein: The insulating housing (2) comprises two insulating half shells (201) arranged opposite to each other, wherein one of the insulating half shells (201) is provided with the positioning boss (2011) and the limiting boss (2012).

9. The protruding column fuse according to claim 8, characterized in that: The two insulating half shells (201) are fastened together by rivets.

10. The post fuse according to claim 9, characterized in that: The connecting terminal (101) is provided with a rivet hole (1012) for the rivet to pass through and an electrical connection hole (1013) for the electrical connection bolt to pass through.

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