Safety capacitor protective cap and installation method of cable and protective cap
By designing a capacitor protective cap made of plastic, using structures such as wire holes, limit fasteners and anti-slip marks, the problem of damage to the protective cap structure when the cable and threading pipe is tightened, and a stable connection and cost reduction are achieved. effect.
Patent Information
- Application Number
- CN202411356208.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-09-11
- Filing Date
- 2024-09-27
- Publication Date
- 2024-12-13
AI Technical Summary
The existing capacitor protective caps need to destroy the structure and appearance of the protective caps during the structure formation between the fastening cable and the threading tube, and the material requirements are high and the cost is high.
Safety capacitor protective cap made of plastic, designed with wire holes, limit fasteners and fastening grooves, strengthening the fastening effect through anti-slip marks and reinforcement ribs, and cables are realized through wire channel and groove notches The fixing of the wire maintains the integrity of the protective cap.
It realizes a stable connection of the cable, enhances the tightening strength, reduces material costs, and maintains the complete structure of the protective cap for easy operation.
Smart Images
Figure CN119132833A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of capacitor structures in the form of cable lead-out, in particular to a safety capacitor protective cap and a method for installing the cable and the protective cap. Background Art
[0002] like Figure 1 FIG. 1 is a schematic diagram of a capacitor with a cable lead-out structure in the prior art, which includes a capacitor body with a capacitor core, and the capacitor body includes an aluminum metal shell A4 arranged at the outermost circle, and an aluminum protective cap (such as Figure 2 As shown in the figure, the aluminum protective cap is composed of a protective part A1, a crimping part A2 and a wire threading tube A3. The wire threading tube A3 is located on the upper part of the protective part A1 and is straight. The wire threading tube A3 has 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 spot.
[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 spot due to external force, we usually use tools (such as clamps) to clamp the wire tube A3 to shrink and deform it and clamp it tightly to the outer wall of the lead-out cable A5, thereby realizing a fastening structure between the shrinking and deformed wire tube A3 and the lead-out cable A5, so as to reduce the risk of the lower end of the lead-out cable A5 loosening from the welding spot due to external force.
[0004] However, under the above-mentioned 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 the destruction of the structure and appearance of the protective cap. Summary of the invention
[0005] The purpose of the present invention is to provide a capacitor fixed protective cap to solve the technical problem that the fastening structure between the lead-out cable and the threading tube formed by using the existing protective cap structure needs to destroy the existing structure and appearance of the protective cap. The present invention has a simple structure and lower cost.
[0006] In order to achieve the above object, the present invention adopts the following technical solutions:
[0007] A safety capacitor protective cap, comprising a protective part and a crimping part; the crimping part is connected to the lower end of the protective part; the protective part 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 part;
[0008] The end of the limiting fastener away from the wire hole is provided with a fastening groove with front and rear ends penetrating therethrough;
[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 the cable can 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 pattern is a convex point or a convex block or a convex straight pattern or a convex staggered pattern or a convex thread.
[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 part; 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 arranged at the upper end of the protection part, and the limiting fastener is vertical;
[0015] Or the wire-passing hole is arranged on the side wall of the protective part, 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] A method for installing a cable and a protective cap, using the capacitor fixed protective cap, wherein the cable is a lead-out cable, comprises the following steps:
[0019] Step 1: Pass the lead-out cable through the cable hole, and the portion of the lead-out cable located outside the cable hole extends out from the open opening of the cable passage;
[0020] Step 2: Insert the lead-out cable into the fastening groove from the groove opening; after being inserted into the fastening groove, the anti-slip pattern is fastened to the outer wall of the lead-out cable along the radial direction.
[0021] Furthermore, in step one, one end of the lead-out cable is inserted into the wire hole 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 passage and then extends out from the open mouth of the wire passage.
[0022] Compared with the prior art, the present invention provides a safe capacitor protective cap and a method for installing a cable and a protective cap, which has the following beneficial effects:
[0023] By using the protective cap of the present invention, the lead-out cable passing through the wire hole can be fixed and clamped through the fastening groove. After the lead-out cable is clamped into the fastening groove from the groove opening of the fastening groove, the anti-slip pattern inside the fastening groove will be pressed against the outer wall of the lead-out cable in the radial direction, which can increase the friction between the fastening groove and the lead-out cable, thereby enhancing the connection strength between the fastening groove and the lead-out cable. In the process of forming the above-mentioned fastening structure, the existing structure and appearance of the protective cap remain relatively intact, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a structural schematic diagram of an existing capacitor with a cable lead-out form.
[0025] Figure 2 It is the existing aluminum protective cap for capacitors.
[0026] Figure 3 The three-dimensional structure of the safety capacitor protective cap in the first embodiment Figure 1 .
[0027] Figure 4 The three-dimensional structure of the safety capacitor protective cap in the first embodiment Figure 2 .
[0028] Figure 5 It is a schematic structural diagram of the safety capacitor protection cap and the capacitor body after being assembled in the first embodiment.
[0029] Figure 6 It is a structural schematic diagram of a capacitor body assembled with the safety capacitor protective cap in the first embodiment.
[0030] Figure 7 It is a cross-sectional view of the safety capacitor protective cap in the first embodiment.
[0031] Figure 8 It is a schematic structural diagram of the safety capacitor protection cap in the second embodiment.
[0032] In the figure:
[0033] 1-protection part, 11-wire hole, 2-crimping part, 21-annular protrusion, 22-upper part of inner ring, 23-lower part of inner ring, 3-limiting fastener, 31-fastening groove, 311-groove mouth, 32-wire channel, 33-reinforcement rib;
[0034] 4-metal shell, 41-flanged edge, 5-leading cable;
[0035] In the prior art:
[0036] A1-protective part, A2-crimping part, A3-wire tube, A33-wire hole, A4-aluminum metal shell, A5-lead-out cable. DETAILED DESCRIPTION
[0037] 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 described embodiments 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 creative work are within the scope of protection of the present invention.
[0038] Embodiment 1
[0039] like Figure 3-6 As 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, 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.
[0040] The end of the limiting fastener 3 away from the wire hole 11 is provided with a fastening groove 31 that penetrates the front and rear ends, and the inner wall of the fastening groove 31 is provided with anti-skid patterns in the radial direction. The anti-skid patterns are convex patterns, and their function is to increase the friction between the inner wall of the fastening groove 31 and the lead-out cable. When the lead-out cable is inserted into the fastening groove 31 from the groove opening of the fastening groove 31, the connection strength between the fastening groove 31 and the lead-out cable can be enhanced.
[0041] 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 convex points or convex blocks or convex staggered patterns or convex 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.
[0042] 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. 1 ) is 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.
[0043] In the first embodiment, between the rear end of the fastening groove 31 and the wire hole 11 is a wire passage 32, which 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, such as Figure 4 , 7The wire passage 32 is located below the limiting fastener 3, and the side of the wire passage 32 is a non-enclosed structure, forming an open opening, which allows the cable to enter and exit the wire passage 32. In this embodiment, the open opening is connected to the groove opening 311.
[0044] Preferably, in the first embodiment, the side wall of the limiting fastener 3 facing the wire passage 32 is a concave arc surface (such as Figure 4 When the lead-out cable 5 is inserted into the fastening groove 31, the arc-shaped outer side wall of the lead-out cable 5 in the wire passage 32 can form a good fit with the concave arc surface.
[0045] 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 .
[0046] Specifically, in the first embodiment, the groove opening 311 is located at the lower end and 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 bottom to top, since 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 bottom to top 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 easy to bend or break due to excessive upward force.
[0047] at the same time, Figure 6 A capacitor body that can be crimped with the capacitor fixed protective cap in this embodiment, such as Figure 6 As shown in FIG. 1 , the capacitor body includes a capacitor core, a metal shell 4, and a 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 outward from bottom to top, that is, the diameter of the outer wall increases as it approaches the edge.
[0048] Connect the plastic protective cap with Figure 6 After the capacitor body shown is crimped, the outer wall of the flange 41 is tightly combined with the inner wall of the crimping part 2. Since the plastic has a certain elasticity, the diameter of the inner circle of the crimping part 2 can be appropriately expanded during the crimping process. After the outer wall of the flange 41 is fitted with the inner wall of the crimping part 2, the diameter of the inner circle of the crimping part 2 shrinks, thereby achieving a tight combination of the outer wall of the flange 41 and the inner wall of the crimping part 2. At the same time, due to the friction coefficient between the metal material and the plastic material, the flange 41 and the crimping part 2 will not loosen under a certain force.
[0049] 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 radially provided 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 tightly attached to the outer wall of the flange 41, the annular protrusions 21 are pressed tightly against the outer wall of the flange 41, increasing the friction force and thus 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 presents a structure that is small at the bottom and large at the top, while the inner ring lower portion 23 presents a structure that is large at the bottom and small at the top.
[0050] Through the structure of the protective cap in this embodiment, the lead-out cable passing through the wire hole can be fixed and clamped by 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 inserted 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.
[0051] 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 appropriately 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.
[0052] With the structure of the protective cap in this embodiment, it is not necessary to tighten the lead-out cable by shrinking the threading tube 3, and therefore, it is not necessary to use metal materials to make the protective cap. Instead, the protective cap is formed by injection molding of plastic materials, which can further reduce the material cost compared with the metal protective cap.
[0053] The installation method of the capacitor protective cap and the lead-out cable described in this embodiment is as follows:
[0054] 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;
[0055] 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 pattern is fastened to the outer wall of the lead-out cable along the radial direction.
[0056] In step one, one end of the lead-out cable can be inserted 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.
[0057] 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 mouth.
[0058] Or in step 1, we can first insert one end of the lead-out cable into the wire passage 32 through the open mouth of the wire passage 32, and then insert it into the wire hole 11 from the outside to the inside and enter the inner cavity of the protective part 1. Then proceed to step 2 to clamp the lead-out cable into the fastening groove 31.
[0059] 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.
[0060] Embodiment 2
[0061] 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 arranged at the upper end of the protection part 1, and the corresponding limiting fastener 3 is also arranged at the upper end of the protection part 1, and the limiting fastener 3 extends longitudinally, such as 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-passing hole (11) is provided with a fastening groove (31) with front and rear ends penetrating therethrough; 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 allows 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 pattern is a convex point or a convex block or a convex straight pattern or a convex staggered pattern or a convex thread.
3. A safety capacitor protective cap according to claim 2, characterized in that: The outer wall of the limiting fastener (3) is also 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 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 limiting fastener (3) facing the wire passage (32) is a concave arc surface.
5. The safety capacitor protective cap according to claim 4, characterized in that: The wire hole (11) is arranged at the upper end of the protection part (1), and the limiting fastener (3) is vertical; Or the wire hole (11) is arranged on the side wall of the protection part (1), and the limiting fastener (3) is horizontal.
6. The capacitor fixed 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 capacitor fixed protective cap according to claim 6, characterized in that: The protective cap is a plastic part.
8. A method for installing a cable and a protective cap, characterized in that: The capacitor fixed protective cap as described in claims 1 to 8 is used, and the cable is a lead-out cable, comprising the following steps: 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); 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 pattern is fastened to the outer wall of the lead-out cable along the radial direction.
9. A method for installing a cable and a protective cap according to claim 8, characterized in that: In step one, one end of the lead-out cable is inserted into the wire hole (11) from the inside to the outside through the inner cavity of the protective part (1), and the end of the lead-out cable enters the wire passage (32) and then extends out from the open mouth of the wire passage (32).