Connecting assembly and fuse box

Abstract

The utility model discloses a connecting assembly and a fuse box, and belongs to the technical field of connectors. The terminal comprises a main body part and a convex part which are connected with each other, the main body part is provided with an accommodating hole, and at least part of the convex part is arranged in the accommodating hole; the main body part comprises a first surface and a second surface which are arranged back to back along a first direction, the convex part comprises a third surface and a fourth surface which are arranged back to back along the first direction, and the third surface is positioned on one side, deviating from the second surface, of the first surface; the nut comprises a fastening part and a crimping part, the crimping part is connected to one side, in the first direction, of the fastening part and penetrates through the containing hole, and the protruding part surrounds the crimping part and is clamped between the fastening part and the crimping part; according to the connecting assembly, the protruding part is arranged and protrudes out of the first face, so that the thickness of the protruding part is increased, the strength of the retaining wall is improved, and good riveting of the nut is guaranteed.

Description

Technical Field

[0001] The present application belongs to the technical field of connectors, and in particular relates to a connection assembly and a fuse box. Background Art

[0002] The connection between the copper bar and the terminal in the existing fuse box is usually to assemble a nut on the terminal, and use the nut and the stud on the copper bar to thread together to fix the terminal and the copper bar. The connection between the terminal and the nut is generally connected by riveting the nut and the terminal together. This structural form has requirements on the thickness of the terminal material. According to experience, when the material with a thickness of less than 1.0mm is punched and countersunk, the thickness of the hole edge becomes lower. The insufficient material thickness leads to low strength of the retaining wall, which causes the problem of poor nut riveting. Utility Model Content

[0003] Purpose of the utility model: to improve the problem of low strength of retaining wall caused by insufficient material thickness and poor riveting of nuts.

[0004] Technical solution: The connection assembly described in the embodiment of the present application includes a terminal and a nut;

[0005] The terminal comprises a main body and a protruding portion connected to each other, the main body is provided with a receiving hole, and the protruding portion is at least partially disposed in the receiving hole;

[0006] The main body portion includes a first surface and a second surface disposed opposite to each other along a first direction, and the raised portion includes a third surface and a fourth surface disposed opposite to each other along the first direction, wherein the third surface is located on a side of the first surface away from the second surface;

[0007] The nut includes a fastening portion and a crimping portion, wherein the crimping portion is connected to one side of the fastening portion along the first direction and is passed through the accommodating hole, and the protruding portion is arranged around the crimping portion and is clamped between the fastening portion and the crimping portion.

[0008] Correspondingly, a fuse box described in an embodiment of the present application includes the above-mentioned connecting assembly.

[0009] Beneficial effects: During installation, the terminal is fixed to the copper bar in the fuse box by screwing the nut, and the nut abuts against the raised part; the raised part serves as the bearing base of the nut, and its third surface abuts against the nut. Since the third surface of the raised part protrudes from the first surface, the protruding part forms an additional material thickness, which increases the overall thickness of the raised part, improves the strength of the retaining wall, and ensures good riveting of the nut. The local thickening design of the raised part at the receiving hole position saves materials and costs compared to increasing the overall material thickness of the terminal.

[0010] The fuse box of the embodiment of the present application includes the above-mentioned connection assembly, and thus can have all the technical features and beneficial effects of the above-mentioned connection assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 A schematic diagram of the structure of the connection assembly provided in an embodiment of the present application;

[0013] Figure 2 A schematic diagram of the structure of the terminal provided in the embodiment of the present application;

[0014] Figure 3 A schematic diagram of the structure of a nut provided in an embodiment of the present application;

[0015] Figure 4 A schematic diagram of a cross-sectional structure of a connection assembly provided in an embodiment of the present application;

[0016] Figure 5 for Figure 4 A schematic diagram of the local enlarged structure of the A region of the middle connection component;

[0017] Figure numerals: 1, terminal; 11, main body; 111, accommodating hole; 1101, first surface; 1102, second surface; 12, raised portion; 121, third surface; 122, fourth surface; 123, first rounded corner; 124, second rounded corner; 2, nut; 21, fastening portion; 22, crimping portion; 3, fixing point. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0019] In the description of the present application, it should be understood that the terms "height", "thickness", "up", "down", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined.

[0020] It should also be noted that in the drawings of the embodiments of the present application, the arrow marked with X represents the first direction. The first direction is introduced to more clearly describe the structure and relative position relationship of the components in the connection assembly. In actual applications, the first direction X may change according to different placement methods of the connection assembly.

[0021] In the related art, the connection method between the nut and the terminal is to punch a countersunk hole on the terminal, the nut is a riveted nut, the crimping part of the riveted nut is passed through the countersunk hole, and then the crimping part is flanged by a riveting device so that the crimping part buckles the side of the terminal away from the riveted nut to achieve the fixation of the nut and the terminal. Since the terminal itself is thin, after punching the countersunk hole, the thickness of the hole edge becomes even lower, and the insufficient material thickness leads to low retaining wall strength, which easily causes problems such as poor nut riveting and insufficient holding force.

[0022] If the terminal edge is bent to connect the nut, a flanged nut is required. The terminal needs to be bent to form two or more fixing points. Each fixing point is set around the flange and holds the flange to fix the nut to the terminal. Since the flange nut occupies a large space, it cannot be used in the limited space inside the fuse box.

[0023] In view of this, an embodiment of the present application provides a connection component, aiming to solve at least one of the above-mentioned technical problems.

[0024] Please combine Figure 1 and Figure 2 The connection assembly of the embodiment of the present application includes a terminal 1 and a nut 2. The terminal 1 includes a main body 11 and a protruding portion 12 connected to each other. The main body 11 is provided with a receiving hole 111. The receiving hole 111 is a cylindrical hole. The receiving hole 111 penetrates the main body 11 along a first direction. The protruding portion 12 is at least partially arranged in the receiving hole 111.

[0025] Please combine Figure 4 and Figure 5 The main body 11 includes a first surface 1101 and a second surface 1102 disposed opposite to each other along a first direction, and the protrusion 12 includes a third surface 121 and a fourth surface 122 disposed opposite to each other along the first direction, and the third surface 121 is located on the side of the first surface 1101 away from the second surface 1102. The fourth surface 122 is located in the receiving hole 111, and in conjunction with the position of the third surface 121, the protrusion 12 is partially located in the receiving hole 111, and the other part is located outside the main body 11.

[0026] Please combine Figure 3 and Figure 4The nut 2 includes a fastening portion 21 and a crimping portion 22. The fastening portion 21 has an internal threaded hole. The internal thread penetrates the fastening portion and is used to cooperate with the stud thread. The cross-section of the fastening portion 21 is hexagonal, and can also be circular or other polygonal shapes, which are not limited here. The crimping portion 22 is connected to one side of the fastening portion 21 along the first direction and is penetrated by the accommodating hole 111. The crimping portion 22 has a rotary structure. The protrusion 12 is arranged around the crimping portion 22 and is clamped between the fastening portion 21 and the crimping portion 22.

[0027] When connected, the fastening portion 21 cooperates with the stud thread on the copper bar in the fuse box to press the terminal 1 onto the copper bar in the fuse box, and the fastening portion 21 is pressed against the raised portion 12, so that the terminal 1 is fixed to the copper bar. Compared with the case where the terminals 1 of the same material thickness are all punched out using the punching hole process, the protruding setting of the raised portion 12 plays a role in thickening the edge of the hole, so that the retaining wall strength of the raised portion 12 is improved, and there is no need to adopt a structural form with a flange nut. Since the structural form with a flange nut needs to be bent on the basis of the terminal to form a fixed point 3 to fix the flange nut, in the structural design of the raised portion 12 and the fastening portion 21, there is no need to add an additional bending process to process the fixed point 3. On the one hand, it can save costs and simplify the process. On the other hand, the raised portion 12 is partially located outside the main body 11. Compared with the raised portion 12 extending toward the second surface 1102, it saves the occupation of the internal space of the accommodating hole 111 and reserves sufficient riveting space for the crimping portion 22.

[0028] Please refer to Figure 5 In some embodiments, the minimum dimension of the protrusion 12 along the first direction is not less than the distance between the first surface 1101 and the fourth surface 122, and the thickness of the protrusion 12 along the first direction is not less than 0.8 mm.

[0029] By limiting the minimum size of the protrusion 12 along the first direction, the strength of the connection between the protrusion 12 and the main body 11 is strengthened. The thickness of the protrusion 12 is greater than or equal to 0.8 mm, which can achieve a sufficiently thick retaining wall strength to ensure the connection between the terminal 1 and the nut 2.

[0030] Please refer to Figure 4 In some embodiments, the orthographic projection of the crimping portion 22 on the fourth surface 122 along the first direction covers at least a portion of the fourth surface 122 , and one end of the crimping portion 22 away from the fastening portion 21 is located in the accommodating hole 111 .

[0031] The initial state of the crimping portion 22 is a straight cylinder. After passing through the receiving hole 111, it is deformed by the punching of the riveting equipment, and is bent from the middle toward the wall of the receiving hole 111, thereby forming a clamp on the protruding portion 12 with the fastening portion 21. After being bent, the crimping portion 22 can partially cover the fourth surface 122, or can completely cover the fourth surface 122. Different coverage areas mean that the bending size of the crimping portion 22 is different, which will affect the connection force and shear strength after riveting. Since the riveting process belongs to the prior art, it is specifically determined according to the specifications of the crimping portion 22, and will not be repeated here.

[0032] One end of the crimping portion 22 away from the fastening portion 21 is located in the accommodating hole 111, that is, the end of the crimping portion 22 away from the fastening portion 21 does not cross the second surface 1102. When the terminal 1 is fixed to the copper busbar, the terminal 1 can fit on the surface of the copper busbar to stabilize the connection between the terminal 1 and the copper busbar.

[0033] Please refer to Figure 4 In some embodiments, the receiving hole 111 has an axis, the fastening portion 21 and the receiving hole 111 are coaxially distributed, there is a gap between the protruding portion 12 and the crimping portion 22, and the fastening portion 21 can rotate around the axis and relative to the main body 11.

[0034] The axis can be regarded as an infinitely long line, which passes through the center point of the hole in an ideal situation and is aligned with the geometric center of the hole diameter; coaxial means that the axes of the fastening part 21 and the receiving hole 111 are parallel and colinear. The fastening part 21 can rotate freely, which is convenient for assembly with the stud and enables the fastening part 21 to have sufficient retaining wall strength.

[0035] In some other embodiments, the fastening portion 21 may also be fixed to the main body 11, that is, the crimping portion 22 and the protruding portion 12 are pressed tightly by riveting, and the fastening portion 21 is pressed tightly against the first surface 1101. When the space inside the fuse box is limited, a structure in which the fastening portion 21 can rotate freely can be selected. If the space inside the fuse box is sufficient, two structural designs can be freely selected.

[0036] Please refer to Figure 4 In some embodiments, the protrusion 12 is integrally formed with the main body 11 , the protrusion 12 and the first surface 1101 are transitioned through a first fillet 123 , and the protrusion 12 and the wall of the accommodating hole 111 are transitioned through a second fillet 124 .

[0037] When the terminal 1 is punched, a step protrusion is stretched out on the outer edge of the hole to form a protrusion 12. Compared with the structure of the flange nut and the terminal, there is no need to add additional equipment or process to bend the terminal to form the fixing point 3, and the process is simplified, which is conducive to improving the processing efficiency of the product. Combined with the setting that the minimum dimension of the protrusion 12 along the first direction is not less than the spacing between the first surface 1101 and the fourth surface 122, that is, in the process of stretching the protrusion 12, the connection part between the protrusion 12 and the main body 11 needs to reduce the extension in the axial direction of the receiving hole 111, so that the connection part between the two has sufficient thickness to ensure the strength of the retaining wall.

[0038] The first fillet 123 is conducive to reducing the stress concentration between the protrusion 12 and the first surface 1101, and the second fillet 124 is conducive to reducing the stress concentration between the protrusion 12 and the second surface 1102, reducing the risk of cracks and fractures. Specifically, the first fillet 123 and the second fillet 124 are formed together with the protrusion 12 during the hole stretching process.

[0039] In some other embodiments, the protrusion 12 can be divided into a first part and a second part along the first surface 1101, the second part is located in the receiving hole 111, and is integrally formed with the main body 11 through a punching hole process, and the first part is fixed to the second part in a detachable connection manner, and the two are superimposed to achieve thickening. This type is mainly based on the strengthening treatment of the processed terminal 1.

[0040] During installation, align the nut 2 with the stud on the copper busbar, screw the fastening part 21, and use the internal thread of the fastening part 21 to engage with the thread of the stud so that the fastening part 21 presses the main body 11 onto the copper busbar to fix the terminal 1.

[0041] Correspondingly, a fuse box provided in an embodiment of the present application includes the connection assembly of the above embodiment, so the fuse box can have all the technical features and beneficial effects of the above connection assembly, which will not be repeated here.

[0042] The connection components provided in the embodiments of the present application are introduced in detail above, and the principles and implementation methods of the present application are explained by using specific examples. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A connection assembly, characterized in that: It comprises a terminal (1) and a nut (2); The terminal (1) comprises a main body (11) and a protruding portion (12) connected to each other, the main body (11) being provided with a receiving hole (111), and the protruding portion (12) being at least partially disposed in the receiving hole (111); The main body (11) comprises a first surface (1101) and a second surface (1102) arranged opposite to each other along a first direction; the raised portion (12) comprises a third surface (121) and a fourth surface (122) arranged opposite to each other along the first direction; the third surface (121) is located on a side of the first surface (1101) facing away from the second surface (1102); The nut (2) comprises a fastening portion (21) and a crimping portion (22), wherein the crimping portion (22) is connected to one side of the fastening portion (21) along a first direction and is passed through the accommodating hole (111), and the protruding portion (12) is arranged around the crimping portion (22) and is clamped between the fastening portion (21) and the crimping portion (22).

2. The connection assembly according to claim 1, characterized in that: The minimum dimension of the protruding portion (12) along the first direction is not less than the distance between the first surface (1101) and the fourth surface (122).

3. The connection assembly according to claim 1, characterized in that: The thickness of the protruding portion (12) along the first direction is not less than 0.8 mm.

4. The connection assembly according to any one of claims 1 to 3, characterized in that: The accommodating hole (111) has an axis, a gap exists between the protruding portion (12) and the crimping portion (22), and the fastening portion (21) is capable of rotating around the axis and relative to the main body portion (11).

5. The connection assembly according to claim 1, characterized in that: The orthographic projection of the crimping portion (22) on the fourth surface (122) along the first direction covers at least a portion of the fourth surface (122).

6. The connection assembly according to claim 1, characterized in that: One end of the crimping portion (22) away from the fastening portion (21) is located in the accommodating hole (111).

7. The connection assembly according to claim 1, characterized in that: The raised portion (12) and the main body (11) are integrally formed.

8. The connection assembly according to claim 1 or 7, characterized in that: The protrusion (12) and the first surface (1101) are transitioned via a first rounded corner (123).

9. The connection assembly according to claim 1, characterized in that: The protrusion (12) and the wall of the receiving hole (111) are transitioned via a second rounded corner (124).

10. A fuse box, characterized in that: A connection assembly comprising any one of claims 1 to 9.

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