Capacitor fixing type protective cap

Abstract

The utility model discloses a fixed protective cap for a capacitor. The fixed protective cap comprises a protective part, a crimping part and a threading pipe, the threading pipe is connected to the outer wall of the protection part; a threading hole for the outgoing cable to penetrate out is formed in the threading pipe; the pipe wall of the threading pipe is provided with at least one through groove for an adhesive to enter the threading hole, and the through groove is communicated with the threading hole. After the leading-out cable penetrates into the threading pipe, an adhesive can be injected into the threading pipe through the through groove, and the purpose of fastening and bonding the leading-out cable and the threading pipe is achieved. The device is simple in structure and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the field of capacitor structures in the form of cable lead-out, in particular to a capacitor fixed type protective cap. Background Art

[0002] like Figure 1 As shown in FIG. 1 , a schematic diagram of a capacitor structure of a cable lead-out type in the prior art is shown. The capacitor body includes a capacitor core. The capacitor body includes an aluminum metal shell A4 arranged on the outermost circle. An aluminum protective cap (such as Figure 2 As shown in FIG, the aluminum protective cap is composed of a protective portion A1, a crimping portion A2 and a wire threading tube A3. The wire threading tube A3 is located above the protective portion A1 and is straight. The wire threading tube A3 contains a wire threading hole A33. The lead-out cable A5 passes straight through the wire threading hole A33 in the wire threading tube A3, and the lower end of the lead-out cable A5 is connected to a welding point.

[0003] In order to fix the lead-out cable A5 and prevent the lead-out cable A5 from loosening and breaking off from the welding point due to external force, we usually use tools (such as pliers) to clamp the wire tube A3 to make it shrink and deform and tightly clamp it to the outer wall of the lead-out cable A5, thereby realizing a fastening structure between the shrinkage and deformation wire tube A3 and the lead-out cable A5, thereby reducing the risk of the lower end of the lead-out cable A5 loosening from the welding point due to external force.

[0004] However, under the above fastening method, the material requirements for the protective cap itself are relatively high, and metal with good deformability needs to be used. At the same time, the formation of the fastening structure requires destroying the structure and appearance of the protective cap. Utility Model Content

[0005] The purpose of this utility model is to provide a capacitor fixed protective cap, which solves the technical problem that the fastening structure between the lead-out cable and the threading tube formed by the existing protective cap structure requires destroying the existing structure and appearance of the protective cap. The utility model has a simple structure and lower cost.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A capacitor fixed protective cap, characterized in that it includes a protective portion, a crimping portion and a wire threading tube; the wire threading tube is connected to the outer wall of the protective portion; the wire threading tube has a wire threading hole for leading out the cable; the wall of the wire threading tube is provided with at least one through groove for allowing adhesive to enter the wire threading hole, and the through groove is connected to the wire threading hole.

[0008] Furthermore, the through groove is linear.

[0009] Furthermore, the through groove includes a linear through groove 1 and a linear through groove 2 symmetrically distributed on the wall of the threading pipe; the linear through groove 1 and the linear through groove 2 both include a radial section opened in the radial direction and an axial section opened in the axial direction, and the radial section is connected to the axial section.

[0010] Furthermore, one end of the axial section extends to the outer tube end of the threading tube.

[0011] Furthermore, a plurality of annular protrusions are radially provided on the inner wall of the crimping portion.

[0012] Furthermore, the threading tube is located at the side end of the protective part, is a straight tube and is horizontal.

[0013] Furthermore, the protective cap is a plastic part.

[0014] Furthermore, the threading tube is located at the upper end of the protective part, is a straight tube and is longitudinal.

[0015] Compared with the prior art, the present invention provides a capacitor fixed protective cap with the following features:

[0016] Beneficial effects:

[0017] The protective cap structure of the present invention, which includes at least one through-groove in the conduit wall that communicates with the conduit hole, allows the use of hot-melt adhesive to securely bond the lead-out cable to the conduit. Furthermore, after secure bonding, the connection between the lead-out cable and the conduit is relatively strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of an existing capacitor with cable lead-out form.

[0019] Figure 2 It is the existing aluminum protective cap of the capacitor.

[0020] Figure 3 The three-dimensional structure of the capacitor fixed protective cap in the first embodiment Figure 1 .

[0021] Figure 4 1 is a top view of the capacitor fixed protective cap in the first embodiment.

[0022] Figure 5 The three-dimensional structure of the capacitor fixed protective cap in the first embodiment Figure 2 .

[0023] Figure 6 2 is a cross-sectional view of the capacitor fixed protective cap in the first embodiment.

[0024] Figure 7The present invention relates to a capacitor body which can be press-fitted with the capacitor fixed protective cap in the first embodiment.

[0025] Figure 8 The three-dimensional structure of the capacitor fixed protective cap in the second embodiment Figure 1 .

[0026] Figure 9 The three-dimensional structure of the capacitor fixed protective cap in the second embodiment Figure 2 .

[0027] In the picture:

[0028] 1-protective part, 2-crimping part, 21-annular protrusion, 22-upper part of inner ring, 23-lower part of inner ring, 3-threading tube, 32-outer tube end, 33-threading hole, 34-radial section, 35-axial section, 4-metal shell, 41-flanged edge, 5-lead-out cable;

[0029] In the prior art:

[0030] A1-protective part, A2-crimping part, A3-wire tube, A33-wire hole, A4-aluminum metal shell, A5-lead-out cable. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example 1

[0033] like Figure 3-5 As shown, the present invention provides a capacitor fixed protective cap, comprising a protective portion 1, a crimping portion 2, and a wire tube 3. The wire tube 3 is connected to the outer wall of the crimping portion 2. The wire tube 3 defines a wire hole 33 for the lead-out cable. The wall of the wire tube 3 is provided with at least one through-slot communicating with the wire hole 33. The through-slot is used to inject adhesive into the wire tube 3.

[0034] In this embodiment, the threading tube 3 is arranged on the side wall of the protective part 1, is a straight tube and is horizontal, and the inward pipe opening of the threading tube 3 is connected with the hollow inner cavity of the protective part 1 (such as Figure 5 As shown), the outward end of the threading tube 3 is the outer tube end 32; the threading tube 3 is a threading hole 33, and the through groove on the tube wall is a linear through groove. The through groove is connected at the upper and lower ends, so that the inner wall of the threading tube 3 and the outer wall of the threading tube 3 are connected.

[0035] As a preferred solution, the threading tube 3 can also be arranged at the upper end of the protective part 1.

[0036] During the assembly process, after the lead-out cable passes out from the wire threading hole 33, we can inject liquid hot-melt adhesive into the wire threading tube 3 through the through groove set on the wall of the wire threading tube 3. The hot-melt adhesive flows inward along the through groove into the wire threading tube 3, and the gap and through groove between the outer wall of the lead-out cable and the inner wall of the wire threading tube 3 can be filled; when the hot-melt adhesive cools down, the lead-out cable and the wire threading tube 3 can be tightly bonded, and the gap and through groove between the outer wall of the lead-out cable and the inner wall of the wire threading tube 3 will also be filled with the cooled solid hot-melt adhesive.

[0037] Through the structure of the protective cap in this embodiment, we can use hot melt adhesive to achieve the purpose of fastening and bonding the lead-out cable to the threading tube 3. Moreover, after fastening and bonding, the connection strength between the lead-out cable and the threading tube 3 is relatively strong and stable.

[0038] At the same time, if Figure 3 As shown in FIG. 1 , in this embodiment, the wall of the threading tube 3 includes two linear through grooves symmetrically distributed on the wall of the threading tube 3, namely linear through groove 1 and linear through groove 2. Moreover, the linear through groove 1 and the linear through groove 2 have the same structure, both consisting of a radial section 34 opened in the radial direction and an axial section 35 opened in the axial direction, and the radial section 34 is connected to the axial section 35, as shown in FIG. Figure 3-4 As shown. Figure 3 As shown, because the first and second linear grooves are symmetrically distributed on the wall of the conduit 3, the two axial segments 35 are also symmetrically distributed, dividing the front portion of the conduit 3 into left and right sections. As the liquid hot-melt adhesive flows into the conduit 3, it can more quickly and fully fill the gap between the outer wall of the lead-out cable and the inner wall of the conduit 3.

[0039] Preferably, in this embodiment, the outer end of the axial section 35 extends to the outer tube end 32 . Under the above structure, the liquid hot-melt adhesive can be guided to the outer tube end 32 .

[0040] Preferably, the fixed protective cap in this embodiment is made of plastic, and the protective portion 1, crimping portion 2, and threading tube 3 are integrally injection molded. Because the plastic material itself has a certain degree of elasticity, and the outer end of the axial section 35 extends to the outer tube end 32, the width of the axial section 35 can be increased or decreased within a certain range under the action of external forces, thereby achieving the purpose of appropriately adjusting the diameter of the front portion of the threading hole 33 to a certain extent.

[0041] The protective cap structure of this embodiment eliminates the need to shrink and deform the threading tube 3 to secure the lead-out cable. Consequently, the protective cap does not need to be made of metal. Injection molding the protective cap with plastic can further reduce material costs compared to metal caps. Furthermore, the existing structure and appearance of the protective cap remain relatively intact during the process of securing the lead-out cable to the threading tube 3, making it easy to operate.

[0042] at the same time, Figure 7 The capacitor body is a capacitor body that can be pressed with the capacitor fixed protective cap in this embodiment. As shown in the figure, the capacitor body includes components such as the capacitor core, the metal shell 4 and the lead cable 5. The structure of the flange 41 at the upper end of the metal shell 4 is as follows: Figure 6 As shown, the outer wall of the flange 41 expands from bottom to top, that is, the diameter of the outer wall increases as it approaches the edge.

[0043] Preferably, in order to further enhance the connection strength between the flange 41 and the crimping portion 2, as Figure 4 As shown, in this embodiment, a plurality of annular protrusions 21 are further provided radially on the inner wall of the crimping portion 2. During the crimping process, the flange 41 can be inserted into the inner ring of the crimping portion 2. When the inner wall of the crimping portion 2 is in close contact with the outer wall of the flange 41, the annular protrusions 21 are pressed against the outer wall of the flange 41, increasing the friction force and thereby increasing the connection strength between the flange 41 and the crimping portion 2. At the same time, Figure 6 As shown, the inner ring of the crimping portion 2 includes an inner ring upper portion 22 and an inner ring lower portion 23 . The inner ring upper portion 22 has a structure that is smaller at the bottom and larger at the top, while the inner ring lower portion 23 has a structure that is larger at the bottom and smaller at the top.

[0044] Connect the plastic protective cap with Figure 7 After the capacitor body is crimped, the outer wall of flange 41 is tightly bonded to the inner wall of crimping portion 2. Due to the elasticity of the plastic, the diameter of the inner ring of crimping portion 2 can be appropriately expanded during the crimping process. After the outer wall of flange 41 and the inner wall of crimping portion 2 are in contact, the diameter of the inner ring of crimping portion 2 shrinks, thus achieving a tight bond between the outer wall of flange 41 and the inner wall of crimping portion 2. Furthermore, due to the friction coefficient between metal and plastic, flange 41 and crimping portion 2 will not loosen under a certain force.

[0045] Example 2

[0046] We also made some adjustments based on the first embodiment to form the second embodiment. Different from the first embodiment, in the second embodiment, the threading tube 3 is arranged at the upper end of the protective part 1 and extends longitudinally; accordingly, the upper and lower ends of the threading hole 33 are connected, such as Figure 8 、 9 shown.

Claims

1. A capacitor fixed protective cap, characterized by: The invention comprises a protective portion (1), a crimping portion (2) and a threading tube (3); the threading tube (3) is connected to the outer wall of the protective portion (1); the threading tube (3) contains a threading hole (33) for the lead-out cable; the wall of the threading tube (3) is provided with at least one through groove for allowing adhesive to enter the threading hole (33), and the through groove is communicated with the threading hole (33).

2. The capacitor fixed protective cap according to claim 1, characterized in that: The through groove is linear.

3. The capacitor fixed protective cap according to claim 2, characterized in that: The through groove comprises a linear through groove 1 and a linear through groove 2 symmetrically distributed on the wall of the threading tube (3); the linear through groove 1 and the linear through groove 2 both comprise a radial section (34) opened in the radial direction and an axial section (35) opened in the axial direction, and the radial section (34) is communicated with the axial section (35).

4. The capacitor fixed protective cap according to claim 3, characterized in that: One end of the axial section (35) extends to the outer tube end of the threading tube (3).

5. The capacitor fixed protective cap according to claim 4, characterized in that: The inner wall of the crimping portion (2) is radially provided with a plurality of annular protrusions (21).

6. A capacitor fixed protective cap according to any one of claims 1 to 5, characterized in that: The threading tube (3) is located at the side end of the protective portion (1), is a straight tube and is horizontal.

7. The capacitor fixed protective cap according to claim 6, characterized in that: The protective cap is a plastic part.

8. A capacitor fixed protective cap according to any one of claims 1 to 5, characterized in that: The threading tube (3) is located at the upper end of the protective portion (1) and is a straight tube in a longitudinal direction.

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