Safety type capacitor hot working protective cap

Abstract

The utility model discloses a safety type capacitor hot working protective cap, which comprises a protective part, a crimping part, a pipe body component I and a pipe body component II, the crimping part is connected to the lower end of the protection part; the rear end of the pipe body component I is fixedly connected with the outer wall of the protection part; concave-convex embedding structures are arranged on the corresponding end parts of the pipe body component I and the pipe body component II; the first pipe body component and the second pipe body component are spliced in a butt joint mode to form a threading pipe, and a threading hole for a leading-out cable to penetrate out is formed in the threading pipe. The inner wall of the threading pipe is provided with a fastening protruding part.

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 safety capacitor thermal processing 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, resulting in obvious shrinkage and deformation of the threading tube A3. Utility Model Content

[0005] The purpose of this utility model is to provide a safe thermal processing protective cap for capacitors, 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 squeezing the tube wall, causing significant deformation and contraction. 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 thermal processing protective cap, characterized by comprising: a protective portion, a crimping portion, a first tubular member, and a second tubular member; the crimping portion is connected to the lower end of the protective portion; the rear end of the first tubular member is fixedly connected to the outer wall of the protective portion; and corresponding ends of the first and second tubular members are provided with concave and convex engaging structures;

[0008] The first and second pipe body components are butt-jointed to form a wire threading tube, wherein the wire threading tube contains a threading hole for the lead-out cable to pass through;

[0009] The inner wall of the threading tube is provided with a fastening protrusion.

[0010] Furthermore, the tubular component 1 and the tubular component 2 are split.

[0011] Furthermore, a flip connection portion is provided between the first and second tubular components along the axial direction; through the flip connection portion, the second tubular component can be flipped in the radial direction.

[0012] Furthermore, the concave-convex engaging structure includes an engaging protrusion and an engaging groove.

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

[0014] Furthermore, the engaging protrusion and the engaging groove can be bonded and fastened together after hot melting, thereby fastening and locking the cable in the wire threading tube.

[0015] Furthermore, the threading tube is located at the side end of the protective part, is a straight tube and is horizontal; or the threading tube is located at the upper end of the protective part, is a straight tube and is vertical.

[0016] Furthermore, the second tubular member is semi-cylindrical in shape.

[0017] Compared with the prior art, the present invention provides a safe capacitor thermal processing protective cap with the following beneficial effects:

[0018] In the present invention, a wire threading tube is composed of a first tube member and a second tube member, and a concave-convex splicing structure is provided on the corresponding ends of the first and second tube members. The concave-convex splicing structure has two states: open and splicing-closed. When splicing-closed, the wire threading tube is formed. The concave-convex splicing structure is bonded or fused together by gluing or hot-melting the first and second tube members, thereby locking the structure of the wire threading tube. At the same time, a fastening protrusion is provided on the inner wall of the wire threading tube. During the process of gluing or fusing the first and second tube members together, the opening between the first and second tube members is continuously tightened, and the fastening protrusion is continuously pressed against the outer wall of the lead-out cable. After the first and second tube members are combined into one, the lead-out cable can be fastened within the wire threading tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of an existing capacitor with cable lead-out form.

[0020] Figure 2 It is the existing aluminum protective cap of the capacitor.

[0021] Figure 3 It is a three-dimensional protective cap in the first embodiment. Figure 1 (The concave-convex joint structure is in the open state).

[0022] Figure 4 It is a three-dimensional protective cap in the first embodiment. Figure 2 (The concave-convex joint structure is in the open state).

[0023] Figure 5 It is a three-dimensional protective cap in the first embodiment. Figure 3 (The bonding state of the concave-convex joint structure after hot melting).

[0024] Figure 6 This is a structural view of the protective cap and the capacitor body in the first embodiment.

[0025] Figure 7 It is the three-dimensional shape of the protective cap in the second embodiment. Figure 1 (The concave-convex joint structure is in the open state).

[0026] Figure 8 It is the three-dimensional shape of the protective cap in the second embodiment. Figure 2 (The bonding state of the concave-convex joint structure after hot melting).

[0027] In the picture:

[0028] 1-protective part, 2-crimping part, 3-threading tube, 4-metal shell, 5-lead-out cable, 30-threading hole, 31-tube component 1, 32-tube component 2, 33-flip connection part, 34-concave-convex interlocking structure, 35-fastening protrusion, 341-interlocking protrusion, 342-interlocking groove;

[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 The figure shows a schematic structural diagram of a safety capacitor thermal processing protective cap in the present invention. Figure 6 This is a schematic diagram of the installation structure of the thermal processing protective cap and the capacitor body of the above-mentioned safety capacitor.

[0034] like Figure 3 As shown, the safety capacitor thermal processing protective cap includes a protective portion 1, a crimping portion 2, a first tubular member 31, and a second tubular member 32. Tube members 31 and 32 form a wire conduit 3. In this first embodiment, the conduit 3 is located at the side of the protective portion 1 and is a straight, horizontally oriented tube. A threading hole 30 is provided within the conduit 3 for the lead-out cables to pass through.

[0035] In this embodiment, the pipe member 1 31 is fixedly connected to the protective part 1, and a concave-convex interlocking structure 34 is provided between the pipe member 2 32 and the pipe member 1 31, and a fastening protrusion 35 is provided radially on the inner wall of the threading tube 3. Figure 3 As shown, in this embodiment, the fastening protrusion 35 is an annular protrusion arranged on the inner wall of the threading tube 3, and the annular protrusion can be composed of two arc-shaped protrusions, one arc-shaped protrusion is arranged on the inner wall of the tube member 1 31, and the other is arranged on the inner wall of the tube member 2 3.

[0036] like Figure 3 As shown, the second tubular member 32 is semi-cylindrical in shape.

[0037] like Figure 3 、 4 As shown, in this embodiment, the concave-convex interlocking structure 34 is arranged on the corresponding ends of the tube body component 1 31 and the tube body component 2 32, specifically including two interlocking protrusions 341 arranged at the end of the tube body component 2 32 and two interlocking grooves 342 arranged at the end of the tube body component 2 32; one interlocking protrusion 341 can be embedded in a corresponding interlocking groove 342 for matching and docking, and the threading tube 3 is formed after the interlocking and splicing.

[0038] In this embodiment, the protective cap in the first embodiment is a plastic part, which can be integrally injection molded using a mold. During operation, we first pass the lead-out cable 5 through the rear opening of the threading hole 30 (i.e., the opening on the protective part 1), so that the lead-out cable 5 is close to the concave inner wall of the tube member 1 31; then, we first use a positioning fixture to fix the position of the protective cap, and then use an ultrasonic welding machine to heat-melt the splicing protrusion 341 and the splicing groove 342, so that the surfaces of the splicing protrusion 341 and the splicing groove 342 are in a hot-melt state; then, we quickly dock the splicing protrusion 341 with the splicing groove 342 so that the two are closed and spliced, and at the same time, the lead-out cable 5 is located between the tube member 2 32 and the tube member 1 31; finally, we keep the splicing closed state of the splicing protrusion 341 and the splicing groove 342 until the splicing protrusion 341 and the splicing groove 342 are combined into one after cooling (such as Figure 5Through the above steps, the engaging protrusion 341 and the engaging groove 342 are fused into one piece under the heat treatment operation, thereby stabilizing the structure of the threading tube 3. Figure 5 、 6 The second pipe member 32 and the first pipe member 31 are combined into one piece in a hot-melt state by virtue of the adhesive property of the plastic material itself.

[0039] At the same time, during the process of integrating the second tube member 32 and the first tube member 31, the radially distributed fastening protrusions 35 continuously press against the outer wall of the lead-out cable 5, and the distance between the first tube member 31 and the second tube member 32 continuously tightens. After cooling, the structure of the threading tube 3 will be fixed. At the same time, the radially distributed fastening protrusions 35 will fasten and lock the lead-out cable 5 in the threading tube 3, thereby forming a fastening structure between the threading tube 3 and the lead-out cable 5. At the same time, during the process of forming the fastening structure between the threading tube 3 and the lead-out cable 5, there is no need to use tools to squeeze and deform the tube wall of the threading tube.

[0040] Of course, in addition to the above-mentioned method of using an ultrasonic welding machine for hot melting operation, we can also use hot melt adhesive to bond the tube member 2 32 to the tube member 1 31. For example, first apply the hot melt adhesive to the engaging protrusion 341, the engaging groove 342, the inner wall of the tube member 2 32, the inner wall of the tube member 1 31, and the outer wall of the lead-out cable 5, and then engage and splice the tube member 2 32 and the tube member 1 31. Finally, clamp the tube member 2 32 and the tube member 1 31 and wait for the hot melt adhesive to cool. After cooling and solidifying, the lead-out cable 5 is fastened in the threading tube 3.

[0041] Preferably, in this embodiment, a flip connection portion 33 is provided between the first tube member 31 and the second tube member 32 along the axial direction; the second tube member 32 is connected to the first tube member 31 through the flip connection portion 33; at the same time, the second tube member 32 can also be radially flipped through the flip connection portion 33. Figure 3 、 4 As shown, it shows the structural state of the second tubular member 32 after being flipped open relative to the first tubular member 31.

[0042] The second pipe member 32 is connected to the first pipe member 31 via the flipped connecting portion 33, while the rear end of the first pipe member 31 is connected to the protective portion 1, thereby achieving the connection between the second pipe member 32 and the protective portion 1. Furthermore, since the second pipe member 32 and the first pipe member 31 are connected, during the subsequent hot-melt operation of the threading tube 3 using an ultrasonic welding machine, the second pipe member 32 can be quickly butted and engaged with the first pipe member 31 by simply flipping the second pipe member 32 radially toward the second pipe member 32, thereby improving operational efficiency.

[0043] Of course, we can also choose to use a split-type structure of the second pipe member 32 and the first pipe member 31, that is, the second pipe member 32 and the first pipe member 31 are separate and do not include the flip connection portion 33. The split structure increases the difficulty of the docking and fitting operation during the hot melt operation, and the docking and fitting operation requirements are relatively high. However, an ultrasonic welding machine can still be used to hot melt the threading tube 3 to achieve the integration of the second pipe member 32 and the first pipe member 31.

[0044] In this embodiment, the engaging protrusion 341 and the engaging groove 342 both extend along the axial direction, and the two form a concave-convex engaging structure. Preferably, in this embodiment, the engaging protrusion 341 is a trapezoidal block, and the engaging groove 342 is an inverted trapezoidal groove. After the trapezoidal block is turned 180 degrees and enters the engaging groove 342, it becomes an inverted trapezoidal shape, as shown in FIG. Figure 3 shown.

[0045] After the plastic protective cap is crimped onto the metal shell 4 in the capacitor body, the upper end of the metal shell 4 snaps into the inner ring of the crimping portion 2. Due to the elasticity of the plastic, the diameter of the inner ring of the crimping portion 2 can be appropriately expanded during the crimping process. Once the outer wall of the metal shell 4 and the inner wall of the crimping portion 2 are in contact, the diameter of the inner ring of the crimping portion 2 shrinks, achieving a tight connection between the metal shell 4 and the crimping portion 2. Furthermore, due to the friction coefficient between the metal and plastic materials, the flange and the crimping portion 2 will not loosen under a certain force.

[0046] Example 2

[0047] We have also made some adjustments based on the first embodiment to form the second embodiment of the safety capacitor thermal processing protective cap. Different from the first embodiment, in the second embodiment, the threading tube composed of the first tube member 31 and the second tube member 32 is arranged at the upper end of the protective part 1 and extends longitudinally; accordingly, the upper and lower ends of the threading hole 30 are connected, such as Figure 7 、 8 shown.

Claims

1. A safety capacitor thermal processing protective cap, characterized by: The invention comprises a protective part (1), a crimping part (2), a first tube member (31) and a second tube member (32); the crimping part (2) is connected to the lower end of the protective part (1); the rear end of the first tube member (31) is fixedly connected to the outer wall of the protective part (1); and concave-convex interlocking structures (34) are provided on the corresponding ends of the first tube member (31) and the second tube member (32); The first tube member (31) and the second tube member (32) are butt-jointed to form a threading tube (3), wherein the threading tube (3) contains a threading hole (30) for leading out the cable; The inner wall of the threading tube (3) is provided with a fastening protrusion (35).

2. The safety capacitor thermal processing protective cap according to claim 1, characterized in that: The tubular component 1 (31) and the tubular component 2 (32) are split.

3. The safety capacitor thermal processing protective cap according to claim 1, characterized in that: A flip connection portion (33) is provided between the first tubular component (31) and the second tubular component (32) along the axial direction; through the flip connection portion (33), the second tubular component (32) can be flipped radially.

4. A safety capacitor thermal processing protective cap according to any one of claims 1 to 3, characterized in that: The concave-convex engaging structure (34) comprises an engaging protrusion (341) and an engaging groove (342).

5. The safety capacitor thermal processing protective cap according to claim 4, characterized in that: The protective cap is a plastic part.

6. The safety capacitor thermal processing protective cap according to claim 5, characterized in that: The engaging protrusion (341) and the engaging groove (342) can be bonded and fastened together after hot melting, thereby fastening and locking the cable in the threading tube (3).

7. The safety capacitor thermal processing protective cap according to claim 6, characterized in that: The threading tube (3) is located at the side end of the protective part (1), is a straight tube and is horizontal; or the threading tube (3) is located at the upper end of the protective part (1), is a straight tube and is vertical.

8. The safety capacitor thermal processing protective cap according to claim 7, characterized in that: The second tubular member (32) is in a semi-cylindrical shape.

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