Integrated fuse

Abstract

The utility model relates to an integrated fuse which comprises a fuse wire and two same shells, and the two shells are arranged in a central symmetry mode with the central axis of the fuse wire as the center line and correspond to each other. The fuse wire comprises a first connecting part, a plurality of fusing parts and a plurality of second connecting parts, the fusing parts are distributed at intervals, the second connecting parts and the fusing parts are in one-to-one correspondence, one end of each fusing part is fixed with the first connecting part, and the other end of each fusing part is fixed with the corresponding second connecting part; the shell is provided with a containing groove, a plurality of partition plates are fixed to the bottom wall of the containing groove at intervals so as to divide the containing groove into a plurality of containing cavities corresponding to the fusing part, and each shell further comprises two clamping faces located on the two sides of the containing groove and two fixing faces located on the two sides of the containing groove; the corresponding fixing surfaces and the partition plates of the two shells are mutually attached and fixed, the corresponding clamping surfaces clamp and fix the first connecting part and the second connecting part, and the fusing part is located in the corresponding accommodating cavity; and the insulating property is improved while the production and manufacturing cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the related technical field of current protector especially relates to an integrated fuse. 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, and the insulation performance of the fuse is required more and more.

[0004] However, the existing fuse cannot consider the production cost and insulation performance. INVENTION CONTENTS

[0005] Therefore, it is necessary to provide an integrated fuse with relatively low cost and strong insulation performance to solve the problem that the existing fuse cannot consider the production cost and insulation performance.

[0006] The application provides an integrated fuse, which comprises a fuse and two identical housings, and the two housings are centrally symmetrically arranged with the central axis of the fuse as the center line and correspond to each other.

[0007] The fuse comprises a first connecting part, a plurality of fuse breaking parts and a plurality of second connecting parts, the fuse breaking parts are distributed along the Y-axis direction, the second connecting parts correspond to the fuse breaking parts one by one, each fuse breaking part is fixed to the first connecting part at one end along the X-axis direction, and the other end is fixed to the corresponding second connecting part.

[0008] The housing is provided with a containing groove, and a plurality of partition plates are fixed on the bottom wall of the containing groove along the Y-axis direction, so as to divide the containing groove into a plurality of containing cavities corresponding to the fuse breaking parts along the Y-axis direction.

[0009] The corresponding fixed surfaces and partition plates of the two housings are fixed to each other, the corresponding clamping surfaces clamp and fix the first connecting part and the second connecting part, and the fuse breaking parts are located in the corresponding containing cavities.

[0010] In one of the embodiments, each of the fixing surfaces is fixed with a plug-in part and is provided with a plug-in slot, the plug-in part is plugged into the corresponding plug-in slot on the other fixing surface, and the top surface of the plug-in part is fixed with the bottom wall of the corresponding plug-in slot by ultrasonic fusion.

[0011] In one of the embodiments, the surface roughness of the top surface of the plug-in part and the bottom wall of the corresponding plug-in slot are different.

[0012] In one of the embodiments, one of the top surface of the plug-in part and the bottom wall of the corresponding plug-in slot is fixed with a first energy-guiding rib, and the cross-sectional area of the first energy-guiding rib gradually decreases along the Z-axis away from the fixing surface.

[0013] In one of the embodiments, the top surface of each of the partitions is stepped along the X-axis, and the top step surface of the partition is attached to the top step surface of the other housing and is fixed by ultrasonic fusion.

[0014] In one of the embodiments, the top surface of each of the partitions includes two step surfaces arranged along the X-axis, the two step surfaces are different in height and surface roughness along the Z-axis, and one of the step surfaces is fixed with a second energy-guiding rib, and the cross-sectional area of the second energy-guiding rib gradually decreases along the Z-axis away from the partition.

[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, the first connecting part and the second connecting part are both provided with through holes 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 provided with a through groove connecting the limiting pin and the accommodating cavity.

[0017] In one of the embodiments, the cross section of the accommodating slot along the XOZ plane is inverted trapezoidal, and the projection of the partition rib along the Z-axis is reciprocating zigzag.

[0018] In one of the embodiments, the clamping surface is processed with sparkles.

[0019] The integrated fuse is centrally and symmetrically arranged with two same housings taking the fuse central axis as the center line, thereby reducing the mold opening cost of the housings and effectively reducing the production difficulty and cost; on this basis, the fuse is designed by integrating multiple fusing parts, and different branches play corresponding protection roles on different control protection ends; on one hand, the integrated structure reduces the size of the fuse, and makes the customer more convenient and safe in installation, control and management; on the other hand, the integrated structure of multiple paths can also reduce the mold cost and management cost, thereby reducing the production cost.

[0020] In addition, by arranging multiple partition ribs in the accommodating cavity, on one hand, the flatness of the product during molding is reduced, and on the other hand, when the fusing part is fused due to current overload, the splashed powder metal will fall into different chambers formed by the partition ribs, thereby effectively improving the insulation performance of the integrated fuse. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a perspective view of the fuse in the integrated fuse;

[0022] Figure 2 It is a perspective view of one of the housings in the integrated fuse;

[0023] Figure 3 It is Figure 2 It is an enlarged view of A in the integrated fuse.

[0024] Reference signs: 10, housing; 11, accommodating groove; 111, partition plate; 111a, stepped surface; 111b, second energy guide rib; 112, accommodating cavity; 112a, partition rib; 12, clamping surface; 12a, limiting pin; 12b, limiting hole; 12c, through groove; 13, fixing surface; 13a, plug-in part; 13b, plug-in groove; 13c, first energy guide rib; 20, fuse; 21, fusing part; 22a, first connecting part; 22b, second connecting part; 22c, through hole. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below. In the following description, a lot of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from the description herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the following disclosed specific embodiments.

[0026] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0027] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0028] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0029] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through 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 is to be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on the other element or intervening elements can be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. As used herein the terms "vertical", "horizontal", "upper", "lower", "left", "right", and the like are used for clarity to provide relative positional information and are not intended to denote an absolute orientation with the illustrated embodiment.

[0031] Please refer to Figure 1 , Figure 2 and Figure 3 , the present application first provides an integrated fuse, including a fuse 20 and two identical housings 10, the two housings 10 are symmetrically arranged with the central axis of the fuse 20 as the center line and correspond to each other; the fuse 20 includes a first connecting part 22a, a plurality of fusing parts 21 and a plurality of second connecting parts 22b, the fusing parts 21 are distributed along the Y-axis direction, the second connecting parts 22b correspond to the fusing parts 21 one by one, each fusing part 21 is fixed at one end along the X-axis direction with the first connecting part 22a and at the other end with the corresponding second connecting part 22b; the housing 10 is provided with a receiving groove 11, the bottom wall of the receiving groove 11 is fixed with a plurality of partitions 111 along the Y-axis direction, so as to separate the receiving groove 11 along the Y-axis direction into a plurality of receiving cavities 112 corresponding to the fusing parts 21, the bottom wall of each receiving cavity 112 is fixed with a plurality of partition ribs 112a along the X-axis direction, the partition ribs 112a extend along the Y-axis direction to be fixed with the inner side wall of the receiving cavity 112, each housing 10 further includes two clamping surfaces 12 located on both sides of the receiving groove 11 along the X-axis direction, and two fixing surfaces 13 located on both sides of the receiving groove 11 along the Y-axis direction; the corresponding fixing surfaces 13 and the partitions 111 of the two housings 10 are fixedly attached to each other, the corresponding clamping surfaces 12 clamp and fix the first connecting part 22a and the second connecting part 22b, and the fusing part 21 is located in the corresponding receiving cavity 112.

[0032] In the present application, by arranging the two identical housings 10 symmetrically with the central axis of the fuse 20 as the center line, the mold opening cost of the housing 10 is reduced, and the production difficulty and cost are effectively reduced; on this basis, the fuse 20 integrates the design of a plurality of fusing parts 21, different branches play a corresponding protection role for different control protection ends, on the one hand, the integrated structure reduces the volume of the fuse, making it more convenient and safe for customers in installation, control, management, etc., on the other hand, the integrated structure of multiple paths can also reduce the mold cost, management cost, thereby reducing the production cost;

[0033] In addition, by arranging a plurality of partition ribs 112a in the accommodating cavity 112, on the one hand, the flatness of the product during molding is reduced, and on the other hand, when the current overload causes the fuse part 21 to melt, the sputtered powder metal will fall into different chambers separated by the partition ribs 112a, thereby effectively improving the insulation performance of the integrated fuse of the application.

[0034] In some embodiments, the shape and size of the fuse part 21 can be changed according to the current demand of the electrical appliance, and only the molding insert needs to be switched in the molding mold, without the need to open the whole mold, thereby further reducing the production cost of the integrated fuse of the application.

[0035] Please refer to Figure 3 As shown in the figure, in some embodiments, each fixed surface 13 is fixed with a plug-in part 13a and is provided with a plug-in slot 13b, the plug-in part 13a is plugged into the plug-in slot 13b on the corresponding fixed surface 13 of the other shell 10, and the top surface of the plug-in part 13a is fixed by ultrasonic fusion with the bottom wall of the corresponding plug-in slot 13b.

[0036] The plug-in cooperation between the plug-in part 13a and the corresponding plug-in slot 13b can play a positioning effect on the one hand, facilitating the preliminary assembly between the two shells 10, thereby reducing the production difficulty, and on the other hand, the fixed surface 13 between the two shells 10 is fixed by the plug-in cooperation, which increases the contact area between the two fixed surfaces 13 and limits the relative movement between the two, thereby increasing the connection strength between the two shells 10, improving the overall connection strength of the fuse, and improving the anti-torque strength and performance during installation.

[0037] In addition, by ultrasonic fusion of the top surface of the plug-in part 13a and the bottom wall of the corresponding plug-in slot 13b, the ultrasonic fusion joint is located in the plug-in slot 13b and will not be exposed to the outside, and the fixed surfaces 13 of the two shells 10 can be flat and fixed, so as to ensure that the appearance joint of the two shells 10 is flat, thereby improving the appearance of the integrated fuse of the application.

[0038] Preferably, the plug-in part 13a and the plug-in slot 13b on each fixed surface 13 are arranged in the X-axis direction.

[0039] Of course, in some other embodiments, each fixed surface 13 can also be provided with different numbers and shapes of plug-in parts 13a and plug-in slots 13b, as long as the plug-in part 13a can be plugged into the plug-in slot 13b on the other shell 10, and the application will not be exemplified here.

[0040] In some embodiments, the surface roughness of the top surface of the plug-in part 13a and the bottom wall of the corresponding plug-in slot 13b is different; the different surface roughness can effectively improve the ultrasonic fusion fixing effect between the shells 10, thereby improving the connection strength of the fuse of the application.

[0041] Please refer to Figure 3 As shown in some embodiments, one of the top surface of the insertion part 13a and the bottom wall of the corresponding insertion groove 13b is fixed with a first energy guide rib 13c, and the cross-sectional area of the first energy guide rib 13c gradually decreases along the Z-axis away from the fixed surface 13 side; the first energy guide rib 13c can be ultrasonically fused with the other rough surface to further improve the welding strength of ultrasonic fusion.

[0042] Preferably, one of the top surface of the insertion part 13a and the bottom wall of the corresponding insertion groove 13b is fixed with a first energy guide rib 13c.

[0043] Please refer to Figure 3 As shown in some embodiments, the top surface of each partition plate 111 is stepped along the X-axis direction, and the top step surface of the partition plate 111 is fitted with the top step surface of the corresponding partition plate 111 of the other shell 10 and is fixed by ultrasonic fusion.

[0044] By fitting and fixing the stepped partition plates 111 with each other, the contact area between the partition plates 111 is increased, thereby increasing the connection and fixing strength between the two shells 10, improving the overall connection strength of the fuse, and improving the torque resistance and performance when installed; In addition, the fuse 20 is clamped and fixed by two shells 10 which are the same and centrally symmetric, and the central symmetry arrangement makes the step directions of the two partition plates 111 that fit with each other opposite, so that the relative movement of the two shells 10 along the X-axis direction is limited by the staggered assembly of the two shells 10, further improving the connection strength between the two.

[0045] Please refer to Figure 3 As shown in some embodiments, the top surface of each partition plate 111 includes two step surfaces 111a arranged along the X-axis direction, the two step surfaces 111a are different in height and surface roughness along the Z-axis direction, and one of the step surfaces 111a is fixed with a second energy guide rib 111b, and the cross-sectional area of the second energy guide rib 111b gradually decreases along the Z-axis away from the partition plate 111 side.

[0046] By ultrasonically fusing the corresponding two step surfaces 111a, the ultrasonic fusion area between the two shells 10 can be increased, thereby increasing the welding strength between the two; the difference in surface roughness of the two and the arrangement of the second energy guide rib 111b can further increase the welding strength of ultrasonic fusion, so as to achieve the effect of improving the connection strength of the integrated fuse of the present application.

[0047] Please refer to Figure 3As shown, in some embodiments, the clamping surface 12 is fixed with a limiting pin 12a and is provided with a limiting hole 12b, the limiting pin 12a corresponds to the limiting hole 12b on the corresponding clamping surface 12 of the other shell 10, the first connecting part 22a and the second connecting part 22b are both provided with a through hole 22c corresponding to the limiting pin 12a and the limiting hole 12b, and the limiting pin 12a penetrates through the corresponding through hole 22c to the corresponding limiting hole 12b.

[0048] By inserting the limiting pin 12a into the through hole 22c and then into the limiting hole 12b, on the one hand, the limiting effect on the fuse 20 is achieved to improve the connection strength of the integrated fuse, and on the other hand, when the first connecting part 22a and the second connecting part 22b are fastened by bolts, the limiting pin 12a penetrating through the through hole 22c can reduce the deformation of the first connecting part 22a and the second connecting part 22b to improve the torsional strength of the fuse 20.

[0049] Please refer to Figure 3 As shown, in some embodiments, the clamping surface 12 is provided with a through groove 12c communicating the limiting pin 12a and the corresponding accommodating cavity 112.

[0050] Please refer to Figure 3 As shown, in some embodiments, the cross section of the accommodating groove 11 along the XOZ plane is in the shape of an inverted trapezoid, and the projection of the partition rib 112a along the Z-axis direction is in the shape of a reciprocating polyline.

[0051] Preferably, four partition ribs 112a are arranged in each accommodating cavity 112, wherein one partition rib 112a is arranged on each of the two inclined surfaces of the accommodating cavity 112, and two partition ribs 112a are arranged on the bottom wall of the accommodating cavity 112.

[0052] Of course, in other embodiments, the shape and number of the partition rib 112a can also be adjusted according to actual needs, as long as the accommodating cavity 112 can be divided into different chambers to store the sputtered metal powder after the fusing part 21 is fused, and the present application does not make further limitations here.

[0053] Please refer to Figure 3 As shown, in some embodiments, the clamping surface 12 is processed with a spark pattern, which can increase the roughness of the clamping surface 12 and improve the clamping firmness of the shell 10 to the fuse 20, and on the other hand, it is convenient for the shell 10 to be demolded to improve the production efficiency.

[0054] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0055] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. An integrated 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 first connecting part (22a), a plurality of fusing parts (21) distributed in the Y-axis direction, and a plurality of second connecting parts (22b) corresponding to the fusing parts (21), each fusing part (21) being fixed at one end along the X-axis direction to the first connecting part (22a) and at the other end to the corresponding second connecting part (22b). The housing (10) is provided with a receiving groove (11), and a plurality of partitions (111) are fixed on the bottom wall of the receiving groove (11) in the Y-axis direction to separate the receiving groove (11) into a plurality of receiving cavities (112) corresponding to the fusing parts (21) in the Y-axis direction. Each receiving cavity (112) is fixed with a plurality of partitioning ribs (112a) on the bottom wall in the X-axis direction, and the partitioning ribs (112a) extend to the inner side wall of the receiving cavity (112) in the Y-axis direction. Each housing (10) further includes two clamping surfaces (12) located on both sides of the receiving groove (11) in the X-axis direction, and two fixed surfaces (13) located on both sides of the receiving groove (11) in the Y-axis direction. The corresponding fixed surfaces (13) and partitions (111) of the two housings (10) are fixed to each other, the corresponding clamping surfaces (12) clamp and fix the first connecting part (22a) and the second connecting part (22b), and the fusing part (21) is located in the corresponding receiving cavity (112).

2. The integrated fuse of claim 1, wherein, Each fixed surface (13) is fixed with a plug-in part (13a) and is provided with a plug-in groove (13b), the plug-in part (13a) is correspondingly plugged into the plug-in groove (13b) on the corresponding fixed surface (13) of the other housing (10), and the top surface of the plug-in part (13a) is fixed to the bottom wall of the corresponding plug-in groove (13b) by ultrasonic fusion.

3. The integrated fuse of claim 2, wherein, The surface roughness of the top surface of the plug-in part (13a) and the bottom wall of the corresponding plug-in groove (13b) is different.

4. The integrated fuse of claim 3, wherein, One of the top surface of the plug-in part (13a) and the bottom wall of the corresponding plug-in groove (13b) is fixed with a first energy guiding rib (13c), and the cross-sectional area of the first energy guiding rib (13c) gradually decreases away from the fixed surface (13) on the Z-axis side.

5. The integrated fuse of claim 2, wherein, The top surface of each partition (111) is stepped in the X-axis direction, and the top step surface of the partition (111) is fitted with the top step surface of the corresponding partition (111) of the other housing (10) and is fixed by ultrasonic fusion.

6. The integrated fuse of claim 5, wherein, The top surface of each of the partitions (111) comprises two stepped surfaces (111a) arranged along the X direction, the two stepped surfaces (111a) are different in height and surface roughness along the Z axis direction, and one of the stepped surfaces (111a) is fixed with a second energy guide rib (111b), the cross-sectional area of the second energy guide rib (111b) gradually decreases away from the side of the partition (111) along the Z axis.

7. The integrated fuse of claim 1, wherein, The clamping surface (12) is fixed with a limiting pin (12a) and is provided with a limiting hole (12b), the limiting pin (12a) corresponds to the limiting hole (12b) on the clamping surface (12) of the other shell (10), the first connecting part (22a) and the second connecting part (22b) are both provided with through holes (22c) corresponding to the limiting pin (12a) and the limiting hole (12b), and the limiting pin (12a) penetrates through the corresponding through hole (22c) to the corresponding limiting hole (12b).

8. The integrated fuse of claim 7, wherein, The clamping surface (12) is provided with a through groove (12c) communicating the limiting pin (12a) and the corresponding accommodating cavity (112).

9. The integrated fuse of claim 1, wherein, The cross section of the accommodating groove (11) along the XOZ plane is in the shape of an inverted trapezoid, and the projection of the partition rib (112a) along the Z axis direction is in the shape of a reciprocating zigzag line.

10. The integrated fuse of claim 1, wherein, The clamping surface (12) is processed with spark patterns.

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