Fuse for increasing connection strength

Abstract

The utility model relates to a fuse capable of increasing connection strength, which comprises a fuse wire and two same shells, and the two shells are arranged in a central symmetry manner by taking the central axis of the fuse wire as a central line and correspond to each other. The fuse comprises a fusing part and two connecting parts connected to the two ends of the fusing part in the X-axis direction, each shell is provided with a containing cavity, and each shell further comprises two clamping faces located on the two sides of the containing cavity in the X-axis direction and two fixing faces located on the two sides of the containing cavity in the Y-axis direction; each fixing face is arranged in a step shape in the Y-axis direction, the corresponding fixing faces of the two shells are attached and fixed, the corresponding clamping faces clamp and fix the connecting part, and the fusing part is located in the containing cavity; according to the fuse provided by the utility model, the step-shaped fixing surfaces are mutually attached and fixed, so that the contact area between the fixing surfaces is increased, the connection and fixing strength between the two shells can be increased, and the overall connection strength of the fuse and the anti-torque strength and performance during installation are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the related technical field of current protector especially relates to a fuse of increasing connecting strength. BACKGROUND

[0002] The fuse is widely used in high and low voltage distribution system, electric control system and electric equipment, and can melt the fuse body by the heat generated by itself when the current exceeds the specified value for a period of time, so as to disconnect the circuit and play the effect of current protection.

[0003] In recent years, with the rapid development of new energy vehicles, the protection device of the whole electric control system and power supply is required more and more high, and the overall strength of the fuse of increasing connecting strength is required more and more high.

[0004] However, the connecting strength between the existing fuse shell and the fuse body is generally low, and some even have poor appearance. Utility model content

[0005] Therefore, it is necessary to provide a fuse of increasing connecting strength for the low connecting strength between the fuse shell and the fuse body.

[0006] The application provides a fuse of increasing connecting strength, which comprises a fuse and two identical shells, the two shells are symmetrically arranged with the central axis of the fuse as the center line and correspond to each other.

[0007] The fuse comprises a fuse portion and two connecting portions connected to both ends of the fuse portion along the X-axis direction, and the shell is provided with a receiving cavity, each shell further comprises two clamping surfaces located on both sides of the receiving cavity along the X-axis direction, and two fixing surfaces located on both sides of the receiving cavity along the Y-axis direction.

[0008] Each fixing surface is arranged in a stepped shape along the Y-axis direction, the corresponding fixing surfaces of the two shells are fixed, the corresponding clamping surfaces clamp the connecting portions, and the fuse portion is located in the receiving cavity.

[0009] In one embodiment, the corresponding fixing surfaces of the two shells are fixed by ultrasonic fusion.

[0010] In one embodiment, each fixing surface comprises two fixing stepped surfaces arranged along the Y-axis direction, the heights of the two fixing stepped surfaces along the Z-axis direction are different, and the surface roughnesses of the two fixing stepped surfaces are different.

[0011] In one embodiment, one of the fixing stepped surfaces of the fixing surface is fixed with an energy guiding rib, and the cross-sectional area of the energy guiding rib gradually decreases away from the fixing stepped surface along the Z-axis direction.

[0012] In one of the embodiments, each of the housings further comprises two abutting surfaces outside the fixing surfaces along the Y-axis direction, each of the abutting surfaces comprises two abutting stepped surfaces arranged along the Y-axis direction and different in height along the Z-axis direction, the two abutting stepped surfaces correspond to the two fixing stepped surfaces along the Y-axis direction respectively, and the connecting positions of the two abutting stepped surfaces are opposite to the connecting positions of the two fixing stepped surfaces along the Y-axis direction.

[0013] In one of the embodiments, the clamping surface is fixed with a limiting part and is provided with a limiting slot, the limiting part corresponds to the limiting slot on the clamping surface of the other housing, and the limiting part abuts against the limiting slot along the X-axis direction close to the side of the accommodating cavity.

[0014] In one of the embodiments, one of the abutting stepped surfaces of the abutting surface is flush with the top surface of the limiting part, and the other abutting stepped surface is flush with the bottom wall of the limiting slot.

[0015] In one of the embodiments, the clamping surface is fixed with a limiting pin and is provided with a limiting hole, the limiting pin corresponds to the limiting hole on the clamping surface of the other housing, and the connecting part is provided with a through hole corresponding to the limiting pin and the limiting hole, and the limiting pin penetrates through the corresponding through hole into the corresponding limiting hole.

[0016] In one of the embodiments, the clamping surface is processed with spark patterns.

[0017] In one of the embodiments, the fusing part comprises a fusing section and two connecting sections, the two connecting sections are arranged along the X-axis direction and connected with the corresponding connecting parts, and the fusing section connects the two connecting sections.

[0018] The fusing section is perpendicular or inclined to the connecting sections along the XOY plane.

[0019] The above-mentioned connecting strength increasing fuse is fixed by the stepped fixing surfaces abutting with each other, the contact area between the fixing surfaces is increased, so that the connecting and fixing strength between the two housings is increased, the overall connecting strength of the fuse is improved, and the torsional strength and performance during installation are improved. In addition, the fuse is clamped and fixed by two housings which are the same and centrally symmetric. On the one hand, the stepped directions of the two fixing surfaces located on the two sides of the accommodating cavity are opposite due to the central symmetry, so that the relative movement of the two housings along the X-axis direction is limited by the staggered assembly of the two housings, and the connecting strength between the two housings is further improved. On the other hand, the same housings reduce the mold opening cost, effectively reducing the production difficulty and cost. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1A perspective view of the application with a connection strength fuse;

[0021] Figure 2 A perspective view of the application with a connection strength fuse Figure 1 A perspective view of the application with a connection strength fuse

[0022] Figure 3 A perspective view of the application with a connection strength fuse Figure 2 A perspective view of the application with a connection strength fuse

[0023] Figure 4 A perspective view of the application with a connection strength fuse

[0024] 10, housing; 11, accommodating cavity; 12, clamping surface; 12a, limiting part; 12b, limiting groove; 12c, limiting pin; 12d, limiting hole; 13, fixed surface; 13a, fixed stepped surface; 13b, energy guiding rib; 14, fitting surface; 14a, fitting stepped surface; 20, fuse; 21, fusing part; 21a, fusing section; 21b, connecting section; 22, connecting part; 22a, through hole. DETAILED DESCRIPTION

[0025] In order to make the above object, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to provide a comprehensive understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In addition, the terms "first", "second", "third", etc. are used herein for descriptive purposes only and should not be construed as indicating or implying relative importance or an ordered sequence. Thus, features defined with "first", "second" or "third" can include, explicitly or implicitly, at least one of such features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0028] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0030] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes, and do not represent the only embodiment.

[0031] Please refer to Figure 1 , Figure 2 and Figure 3As shown, the application first provides a kind of increase connection strength fuse, including fuse 20 and two identical shell 10, two shell 10 is centered on the central axis of fuse 20 Center-symmetric setting and corresponding with each other;Fuse 20 includes fusing portion 21 and two connecting portions 22 connected to the both ends of fusing portion 21 along X axis direction, shell 10 is provided with containing cavity 11, and each shell 10 also includes two clamping surfaces 12 located on the both sides of containing cavity 11 along X axis direction, and two fixed surfaces 13 located on the both sides of containing cavity 11 along Y axis direction;Each fixed surface 13 is arranged in ladder shape along Y axis direction, and the corresponding fixed surface 13 of two shell 10 is fixed, and the corresponding clamping surface 12 clamps connecting portion 22, and fusing portion 21 is located in containing cavity 11.

[0032] In the application, the fixed surfaces 13 are fixed by being in contact with each other in a ladder shape, the contact area between the fixed surfaces 13 is increased, the connection and fixing strength between the two shell 10 is increased, the overall connection strength of the fuse is improved, and the torque resistance and performance during installation are improved.In addition, the fuse 20 is clamped and fixed by the two identical and center-symmetric shell 10, on the one hand, the center-symmetric arrangement makes the ladder directions of the two fixed surfaces 13 located on the both sides of the containing cavity 11 opposite, so that the relative movement of the two shell 10 along the X axis direction is limited by the staggered assembly of the two shell 10, and the connection strength between the two is further improved, on the other hand, the identical shell 10 reduces the mold cost, effectively reduces the production difficulty and cost.

[0033] Please refer to Figure 3 As shown, in some embodiments, the corresponding fixed surfaces 13 of the two shell 10 are fixed by ultrasonic fusion;Each fixed surface 13 includes two fixed ladder surfaces 13a arranged along Y axis direction, the heights of the two fixed ladder surfaces 13a along Z axis direction are different, and the surface roughnesses of the two fixed ladder surfaces 13a are different.

[0034] Because the surface roughnesses of the two fixed ladder surfaces 13a of each fixed surface 13 are different, and the two shell 10 are center-symmetrically arranged, the surface roughnesses of the two fixed ladder surfaces 13a fixed by being in contact with each other are different, so that the fixing effect of ultrasonic fusion between the shell 10 is effectively improved, and the connection strength of the fuse of the application is improved.

[0035] Of course, in other embodiments, each fixed surface 13 can also include a plurality of fixed ladder surfaces 13a, as long as the surface roughnesses of any two fixed ladder surfaces 13a fixed by being in contact with each other are different.

[0036] Please refer to Figure 3As shown, in some embodiments, one of the two fixed step surfaces 13a of the fixed surface 13 with lower surface roughness is fixed with an energy-guiding rib 13b, and the cross-sectional area of the energy-guiding rib 13b gradually decreases along the Z-axis direction away from the fixed step surface 13a.

[0037] The energy-guiding rib 13b can be ultrasonically fused with the rough surface of the other fixed step surface 13a to further improve the ultrasonic fusion welding strength.

[0038] Please refer to Figure 3 As shown, in some embodiments, each shell 10 further comprises two abutting surfaces 14 located outside the fixed surface 13 along the Y-axis direction, and each abutting surface 14 comprises two abutting step surfaces 14a arranged along the Y-axis direction and different in height along the Z-axis direction, the two abutting step surfaces 14a correspond to the two fixed step surfaces 13a along the Y-axis direction respectively, and the connection positions of the two abutting step surfaces 14a along the Y-axis direction are opposite to the connection positions of the two fixed step surfaces 13a.

[0039] Designing the abutting surface 14 outside the fixed surface 13, and taking the joint of the abutting surface 14 of the two shells 10 as the appearance surface, can avoid the joint of the ultrasonic fusion of the fixed surface 13 being directly exposed to the outside world, and ensure that the appearance joint of the two shells 10 is flat, thereby improving the appearance of the safety fuse with increased connection strength.

[0040] Please refer to Figure 2 and Figure 3 As shown, in some embodiments, the clamping surface 12 is fixed with a limiting part 12a and is provided with a limiting groove 12b, the limiting part 12a corresponds to the limiting groove 12b on the clamping surface 12 of the other shell 10, and the connecting part 22 abuts against the limiting part 12a along the X-axis direction close to the accommodation cavity 11 side; the limiting part 12a can limit the displacement of the fuse 20 along the X-axis direction, so as to improve the fixing firmness of the shell 10 to the fuse 20, thereby improving the connection strength of the safety fuse with increased connection strength.

[0041] Specifically, in some embodiments, one of the abutting step surfaces 14a of the abutting surface 14 is flush with the top surface of the limiting part 12a, and the other abutting step surface 14a is flush with the bottom wall of the limiting groove 12b.

[0042] More specifically, the connecting part 22 also abuts against the limiting part 12a along the Y-axis direction to limit the displacement of the fuse 20 along the Y-axis direction, thereby further improving the connection strength of the safety fuse.

[0043] Please refer to Figure 2 and Figure 3As shown, in some embodiments, the clamping surface 12 is fixed with a limiting pin 12c and is provided with a limiting hole 12d, the limiting pin 12c corresponds to the limiting hole 12d on the corresponding clamping surface 12 of the other shell 10, the connecting part 22 is provided with a through hole 22a corresponding to the limiting pin 12c and the limiting hole 12d, and the limiting pin 12c penetrates through the corresponding through hole 22a to the corresponding limiting hole 12d.

[0044] By inserting the limiting pin 12c into the limiting hole 12d through the through hole 22a, on the one hand, the limiting effect on the fuse 20 is achieved, so as to improve the connection strength of the fuse, and on the other hand, when the connecting part 22 is fastened by a bolt, the limiting pin 12c penetrating through the through hole 22a can reduce the deformation of the connecting part 22, so as to improve the torsional strength of the fuse 20.

[0045] In some embodiments, the clamping surface 12 is provided with a spark pattern, which can increase the roughness of the clamping surface 12, improve the clamping firmness of the shell 10 to the fuse 20, and facilitate the demolding of the shell 10, so as to improve the production efficiency.

[0046] Please refer to Figure 4 As shown, in some embodiments, the fusing part 21 includes a fusing segment 21a and two connecting segments 21b, the two connecting segments 21b are arranged along the X-axis direction and are connected with the corresponding connecting part 22, and the fusing segment 21a connects the two connecting segments 21b; the fusing segment 21a is perpendicular or inclined to the connecting segment 21b along the XOY plane; different structures of the fusing part 21 can provide different fusing rated currents, and the application can select different structures of the fusing part 21 according to actual needs, and has high versatility.

[0047] The technical features of the above-described embodiments can be combined arbitrarily, and in order to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the description.

[0048] The above-described embodiments only express several implementation manners of the application, the description is relatively specific and detailed, but it should not be understood as the limitation of the scope of the application patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which all belong to the protection scope of the application. Therefore, the protection scope of the application patent should be subject to the appended claims.

Claims

1. An increased-connection-strength fuse, characterized by, The fuse (20) and two identical housings (10) are provided in a center-symmetrical manner with the central axis of the fuse (20) as the center line, and correspond to each other; The fuse (20) includes a fusing portion (21) and two connecting portions (22) connected to both ends of the fusing portion (21) in the X-axis direction, and the housing (10) is provided with a receiving cavity (11), each housing (10) further includes two clamping surfaces (12) located on both sides of the receiving cavity (11) in the X-axis direction, and two fixing surfaces (13) located on both sides of the receiving cavity (11) in the Y-axis direction; Each fixing surface (13) is arranged in a stepped manner along the Y-axis direction, the corresponding fixing surfaces (13) of the two housings (10) are fixedly attached, the corresponding clamping surfaces (12) clamp and fix the connecting portions (22), and the fusing portion (21) is located in the receiving cavity (11).

2. The increased connection strength fuse of claim 1, wherein, The corresponding fixing surfaces (13) of the two housings (10) are fixed by ultrasonic fusion.

3. The increased connection strength fuse of claim 2, wherein, Each fixing surface (13) includes two fixing stepped surfaces (13a) arranged in the Y-axis direction, the heights of the two fixing stepped surfaces (13a) in the Z-axis direction are different, and the surface roughnesses of the two fixing stepped surfaces (13a) are different.

4. The increased-connection-strength fuse of claim 3, wherein One of the fixing stepped surfaces (13a) of the fixing surface (13) is fixed with an energy guide rib (13b), and the cross-sectional area of the energy guide rib (13b) gradually decreases away from the fixing stepped surface (13a) on one side in the Z-axis direction.

5. The increased-connection-strength fuse of claim 3, wherein Each housing (10) further includes two abutting surfaces (14) located outside the fixing surface (13) in the Y-axis direction, each abutting surface (14) includes two abutting stepped surfaces (14a) arranged in the Y-axis direction and having different heights in the Z-axis direction, the two abutting stepped surfaces (14a) correspond to the two fixing stepped surfaces (13a) in the Y-axis direction, respectively, and the connection positions of the two abutting stepped surfaces (14a) in the Y-axis direction are opposite to the connection positions of the two fixing stepped surfaces (13a).

6. The increased-connection-strength fuse of claim 5, wherein The clamping surface (12) is fixed with a limiting portion (12a) and is provided with a limiting groove (12b), the limiting portion (12a) corresponds to the limiting groove (12b) on the corresponding clamping surface (12) of the other housing (10), and the connecting portion (22) abuts against the limiting portion (12a) on the side close to the receiving cavity (11) in the X-axis direction.

7. The increased-connection-strength fuse of claim 6, wherein One of the abutting stepped surfaces (14a) of the abutting surface (14) is flush with the top surface of the limiting portion (12a), and the other abutting stepped surface (14a) is flush with the bottom wall of the limiting groove (12b).

8. The increased-connection-strength fuse of claim 1, wherein The clamping surface (12) is fixed with a limiting pin (12c) and is provided with a limiting hole (12d), the limiting pin (12c) corresponds to the limiting hole (12d) on the clamping surface (12) of the other shell (10), the connecting part (22) is provided with a through hole (22a) corresponding to the limiting pin (12c) and the limiting hole (12d), and the limiting pin (12c) penetrates through the corresponding through hole (22a) to the corresponding limiting hole (12d).

9. The increased-connection-strength fuse of claim 1, wherein The clamping surface (12) is processed with spark patterns.

10. The increased-connection-strength fuse of claim 1, wherein The fusing part (21) comprises a fusing section (21a) and two connecting sections (21b), the two connecting sections (21b) are arranged along the X-axis direction and are connected with the corresponding connecting part (22), and the fusing section (21a) is connected with the two connecting sections (21b). The fusing section (21a) is perpendicular or inclined to the connecting section (21b) along the XOY plane.

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