Safety capacitor protective cap

Abstract

The utility model discloses a safety type capacitor protective cap. The capacitor protection cap comprises a protection part and a crimping part. The crimping part is connected to the lower end of the protection part; a wire passing hole with two through ends is formed in the protection part, and a limiting fastener is connected to the edge of the wire passing hole in the outer wall of the protection part; a fastening groove with the front end and the rear end penetrating through is formed in the end, away from the wire passing hole, of the limiting fastener. A wire passing channel with an opening is formed between an outer hole opening of the wire passing hole in one side of the limiting fastener and a rear end opening of the fastening groove. The opening is located in the side direction of the limiting fastener and allows the cable to enter and exit from the wire passing channel. The front end of the wire passing channel is communicated with the rear end of the fastening groove, and the rear end of the wire passing channel is communicated with the wire passing hole. The inner wall of the fastening groove is provided with anti-skid lines in the radial direction. The cable clamp is simple in structure, and can clamp and fix the outgoing cable.

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 safety capacitor protective cap comprises a protective portion and a crimping portion; the crimping portion is connected to the lower end of the protective portion; the protective portion is provided with a wire hole with two ends passing through, and a limiting fastener is connected to the edge of the wire hole on the outer wall of the protective portion;

[0008] The end of the limiting fastener away from the wire hole is provided with a fastening groove with front and rear ends passing through;

[0009] A wire-passing channel with an open opening is provided between the outer opening of the wire-passing hole on one side of the limiting fastener and the rear end of the fastening groove; the open opening is located on the side of the limiting fastener, and can allow the cable to enter and exit the wire-passing channel; the front end of the wire-passing channel is communicated with the rear end of the fastening groove, and the rear end of the wire-passing channel is communicated with the wire-passing hole;

[0010] The inner wall of the fastening groove is radially provided with anti-slip grooves.

[0011] Furthermore, the anti-slip patterns are convex dots, convex blocks, convex straight lines, convex staggered lines, or convex threads.

[0012] Furthermore, the outer wall of the limiting fastener is also connected with a reinforcing rib, one end of which is connected to the outer wall of the protective portion; the reinforcing rib and the groove opening of the fastening groove are respectively located at two symmetrical ends of the limiting fastener.

[0013] Furthermore, the side wall of the limiting fastener facing the wire-passing channel is a concave arc surface.

[0014] Furthermore, the wire hole is provided at the upper end of the protective portion, and the limiting fastener is vertical;

[0015] Or the wire-passing hole is arranged on the side wall of the protective portion, and the limiting fastener is horizontal.

[0016] Furthermore, a plurality of annular protrusions are radially provided on the inner wall of the crimping portion.

[0017] Furthermore, the protective cap is a plastic part.

[0018] Compared with the prior art, the present invention provides a safety capacitor protective cap with the following features:

[0019] Beneficial effects:

[0020] The protective cap of this utility model secures and clamps the lead-out cable, which passes through the cable hole, through the fastening groove. Once the lead-out cable is inserted into the fastening groove through its opening, the anti-slip grooves within the fastening groove press radially against the outer wall of the lead-out cable, increasing the friction between the fastening groove and the lead-out cable, thereby strengthening the connection between the two. During the formation of this fastening structure, the existing structure and appearance of the protective cap remain relatively intact, making operation easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of an existing capacitor with cable lead-out form.

[0022] Figure 2 It is the existing aluminum protective cap of the capacitor.

[0023] Figure 3 The three-dimensional structure of the safety capacitor protective cap in the first embodiment Figure 1 .

[0024] Figure 4 The three-dimensional structure of the safety capacitor protective cap in the first embodiment Figure 2 .

[0025] Figure 5 This is a schematic structural diagram of the safety capacitor protective cap and the capacitor body after assembly in Example 1.

[0026] Figure 6 It is a structural schematic diagram of a capacitor body assembled with the safety capacitor protective cap in Example 1.

[0027] Figure 7 It is a cross-sectional view of the safety capacitor protective cap in the first embodiment.

[0028] Figure 8 It is a structural schematic diagram of the safety capacitor protective cap in the second embodiment.

[0029] In the picture:

[0030] 1-protective part, 11-wire hole, 2-crimping part, 21-annular protrusion, 22-inner ring upper part, 23-inner ring lower part, 3-limiting fastener, 31-fastening groove, 311-groove mouth, 32-wire channel, 33-reinforcement rib;

[0031] 4-metal shell, 41-flanged edge, 5-lead-out cable;

[0032] In the prior art:

[0033] A1-protective part, A2-crimping part, A3-wire tube, A33-wire hole, A4-aluminum metal shell, A5-lead-out cable. DETAILED DESCRIPTION

[0034] 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.

[0035] Example 1

[0036] like Figure 3-6As shown, the structure of a safety capacitor protective cap in the present invention is a plastic part, including a protective part 1 and a crimping part 2, and the crimping part 2 is connected to the lower end of the protective part 1; the protective part 1 is provided with a wire hole 11 with two ends passing through, and a limiting fastener 3 is connected to the edge of the wire hole 11 on the outer wall of the protective part 1.

[0037] The end of the position-limiting fastener 3, away from the cable hole 11, is provided with a fastening groove 31 extending through the front and rear ends. The inner wall of the fastening groove 31 is provided with anti-slip grooves in the radial direction. These anti-slip grooves are raised and serve to increase friction between the inner wall of the fastening groove 31 and the lead-out cable. This strengthens the connection between the fastening groove 31 and the lead-out cable when the lead-out cable is inserted into the fastening groove 31 through the groove opening.

[0038] Preferably, the inner wall of the fastening groove 31 in this embodiment is radially distributed with a plurality of raised linear anti-skid patterns. In addition, the anti-skid patterns can also be raised dots, bumps, raised staggered patterns, or raised threads, etc. The plurality of raised patterns form an anti-skid portion in the radial direction of the inner wall of the fastening groove 31.

[0039] like Figure 3 As shown, the limiting fastener 3 in this embodiment is arranged on the outer wall of the protective part 1 and is horizontally extended. In addition, the fastening groove 31 is located in front of the wire hole 11, and the front and rear ends of the fastening groove 31 are connected. The groove opening of the fastening groove 31 (i.e., the groove opening 311, as shown in FIG. Figure 5 As shown in the figure, the lead-out cable 5 is directed directly downward. During operation, the lead-out cable 5 can be inserted into the groove opening 311 from bottom to top, and then enter the fastening groove 31.

[0040] In the first embodiment, the wire passage 32 is located between the rear end of the fastening groove 31 and the wire hole 11. The wire passage 32 is the space between the wire hole 11, the fastening groove 31 and the side wall of the limiting fastener 3. Moreover, the front end of the wire passage 32 is connected to the rear end of the fastening groove 31, and the rear end of the wire passage 32 is connected to the wire hole 11. Figure 4 、 7 The wire passage 32 is located below the limiting fastener 3 and is non-enclosed laterally, with an open opening for cables to pass through the wire passage 32. In this embodiment, the open opening is connected to the groove opening 311.

[0041] Preferably, in the first embodiment, the side wall of the position-limiting fastener 3 facing the wire-passing channel 32 is a concave arc surface (such as Figure 4 When the cable 5 is inserted into the fastening groove 31, the arc-shaped outer wall of the cable 5 in the wire passage 32 can form a good fit with the concave arc surface.

[0042] Preferably, a reinforcing rib 33 connected to the outer wall of the protective part 1 is further provided on the outer wall of the limiting fastener 3 to enhance the strength of the limiting fastener 3; the reinforcing rib 33 and the groove opening of the fastening groove 31 are respectively located at the upper and lower ends of the limiting fastener 3.

[0043] Specifically, in the first embodiment, the groove opening 311 is located at the lower end and opens downward, while the reinforcing rib 33 is connected to the upper end of the limiting fastener 3, and the rear end of the limiting fastener 3 is connected to the outer wall of the protective portion 1. When the lead-out cable 5 is inserted into the fastening groove 31 from the bottom up, because the opening width of the groove opening 311 is slightly smaller than the diameter of the lead-out cable 5, the operator needs to apply force from the bottom up to press the lead-out cable 5 into the groove opening 311 so that the lead-out cable 5 is inserted into the fastening groove 31. At this time, due to the presence of the reinforcing rib 33, the limiting fastener 3 is not easily bent or broken due to excessive upward force.

[0044] at the same time, Figure 6 A capacitor body that can be pressed against the capacitor fixed protective cap in this embodiment, such as Figure 6 As shown, 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 shown in FIG. 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.

[0045] Connect the plastic protective cap with Figure 6 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.

[0046] 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 7 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.

[0047] Through the structure of the protective cap in this embodiment, the lead-out cable passing through the wire hole can be fixed and clamped through the fastening groove. In this embodiment, the diameter of the fastening groove 31 is slightly smaller than the diameter of the lead-out cable 5. After the lead-out cable is clamped into the fastening groove 31 from the groove mouth 311, the anti-slip groove inside the fastening groove 31 will be radially pressed against the outer wall of the lead-out cable.

[0048] At the same time, the protective cap is a plastic part, and the plastic itself has a certain elasticity. When the lead-out cable is inserted into the groove mouth of the fastening groove 31, the groove mouth of the fastening groove 31 can be moderately expanded and restored to contract after the lead-out cable enters the fastening groove 31, thereby restricting the lead-out cable to the fastening groove 31. At the same time, after the reset and contraction, the anti-slip groove inside the fastening groove 31 will be radially pressed against the outer wall of the lead-out cable, increasing the friction between the fastening groove 31 and the lead-out cable, thereby enhancing the connection strength between the fastening groove and the lead-out cable.

[0049] The protective cap structure of this embodiment eliminates the need to shrink the wire conduit 3 to secure the lead-out cable. Consequently, the protective cap does not need to be made of metal. Instead, the protective cap can be injection-molded from plastic, further reducing material costs compared to metal caps.

[0050] The installation method of the capacitor protective cap and the lead-out cable described in this embodiment is as follows:

[0051] Step 1: Pass the lead-out cable through the cable hole 11, and the portion of the lead-out cable located outside the cable hole 11 extends out from the open opening of the cable passage 32;

[0052] Step 2: Insert the lead-out cable into the fastening groove 31 from the groove opening 311 ; after being inserted into the fastening groove 31 , the anti-slip groove is fastened to the outer wall of the lead-out cable along the radial direction.

[0053] In step 1, we can insert one end of the lead-out cable into the wire hole 11 from the inside to the outside through the inner cavity of the protective part, and the end of the lead-out cable enters the wire channel 32 and then extends out from the open mouth of the wire channel 32.

[0054] After the end of the lead-out cable enters the cable passage 32 , we can also use a tool (such as a clamp) to clamp the lead-out cable and pull it out of the cable passage 32 from the open opening.

[0055] Alternatively, in step 1, we can first insert one end of the lead-out cable into the wire passage 32 through the open end of the wire passage 32, and then insert it from the outside to the inside through the wire hole 11 into the inner cavity of the protective part 1. Then, proceed to step 2 to clamp the lead-out cable into the fastening groove 31.

[0056] After the end of the lead-out cable enters the inner cavity of the protective part 1 , we can also use a tool (such as a clamp) to clamp the lead-out cable and draw it into the inner cavity of the protective part 1 from the outside to the inside.

[0057] Example 2

[0058] 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 wire hole 11 is provided at the upper end of the protection part 1, and the corresponding limiting fastener 3 is also provided at the upper end of the protection part 1, and the limiting fastener 3 extends longitudinally, as shown in FIG. Figure 8 shown.

Claims

1. A safety capacitor protective cap, characterized by: It comprises a protective part (1) and a crimping part (2); the crimping part (2) is connected to the lower end of the protective part (1); the protective part (1) is provided with a wire hole (11) with two ends passing through, and a limiting fastener (3) is connected to the edge of the wire hole (11) on the outer wall of the protective part (1); The end of the position-limiting fastener (3) away from the wire hole (11) is provided with a fastening groove (31) with front and rear ends passing through; A wire passage (32) with an open opening is provided between the outer opening of the wire hole (11) on one side of the limiting fastener (3) and the rear end of the fastening groove (31); the open opening is located on the side of the limiting fastener (3) and can allow the cable to enter and exit the wire passage (32); the front end of the wire passage (32) is in communication with the rear end of the fastening groove (31), and the rear end of the wire passage (32) is in communication with the wire hole (11); The inner wall of the fastening groove (31) is radially provided with anti-slip grooves.

2. The safety capacitor protective cap according to claim 1, characterized in that: The anti-slip patterns are convex points, convex blocks, convex straight lines, convex staggered lines, or convex threads.

3. The safety capacitor protective cap according to claim 2, characterized in that: The outer wall of the position-limiting fastener (3) is further connected to a reinforcing rib (33), one end of which is connected to the outer wall of the protective portion (1); the reinforcing rib (33) and the groove opening of the fastening groove (31) are respectively located at two symmetrical ends of the position-limiting fastener (3).

4. A safety capacitor protective cap according to any one of claims 1 to 3, characterized in that: The side wall of the position-limiting fastener (3) facing the wire-passing channel (32) is a concave arc surface.

5. The safety capacitor protective cap according to claim 4, characterized in that: The wire hole (11) is provided at the upper end of the protective portion (1), and the limiting fastener (3) is vertical; Or the wire hole (11) is provided on the side wall of the protection portion (1), and the limiting fastener (3) is horizontal.

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

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

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