CN110943310B - Connecting terminal connecting structure and processing method thereof - Google Patents
Connecting terminal connecting structure and processing method thereof Download PDFInfo
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- CN110943310B CN110943310B CN201911302330.5A CN201911302330A CN110943310B CN 110943310 B CN110943310 B CN 110943310B CN 201911302330 A CN201911302330 A CN 201911302330A CN 110943310 B CN110943310 B CN 110943310B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/01—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the form or arrangement of the conductive interconnection between the connecting locations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/03—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations
- H01R11/09—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations the connecting locations being identical
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/70—Insulation of connections
- H01R4/72—Insulation of connections using a heat shrinking insulating sleeve
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
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Abstract
The invention relates to a connecting structure of a wiring terminal and a processing method thereof, belongs to the technical field of electric fitting, and solves the problems that the existing wiring terminal is poor in reliability, complex to process and large in cable diameter at a connecting part. A connecting structure of a wiring terminal comprises a wiring terminal, a wiring terminal heat-shrinkable sleeve, a protective heat-shrinkable sleeve in a wire shielding layer, a wire shielding layer and a shielding heat-shrinkable sleeve; the wire core wire of the wire to be connected sequentially comprises a wire insulating layer, a protective heat-shrinkable sleeve in the wire shielding layer and a wire shielding layer from inside to outside; the wiring terminal heat-shrinkable sleeve is sleeved outside the wiring terminal and envelops the wire insulation layers at the two ends of the wiring terminal; the shielding heat-shrinkable sleeve is sleeved outside the wiring terminal heat-shrinkable sleeve and envelops the sleeving length of the wire shielding layers at the two ends of the wiring terminal. The invention has simple structure, high reliability, simple processing technology, easy processing and small diameter of the cable at the connecting part.
Description
Technical Field
The invention relates to the technical field of electric fittings, in particular to a connecting structure of a wiring terminal and a processing method thereof.
Background
In the current cable design process, because of the requirement of voltage attenuation, wires with larger diameters are often selected to reduce voltage loss, and the redundant design requirement often requires that a plurality of wires are processed at the same terminal. Due to the characteristic limitation of the cable network connector, wire connection is often required to be carried out by using a wiring terminal, and the continuity of the shielding layers at two ends of the wiring terminal is very important.
The current shielding wire continuity treatment method frequently used comprises the following steps: shielding overline, wave-proof sleeve enveloping and the like. The shielding overline processing method is simple and low in cost, but the shielding effect is poor, and the shielding overline is easy to generate or be influenced, so that the signal quality is interfered; the cost of the wave-proof sleeve enveloping method is low, but the processing method is more complicated and the wire is easy to be damaged. The methods of shielding overline and wave-proof sleeve enveloping have a common defect that the diameter of a cable bundle and the weight of the cable are increased invisibly.
Therefore, it is urgently needed to provide a connection structure and a connection method of a connection terminal, which have high reliability, simple processing technology and small diameter of a connection part.
Disclosure of Invention
In view of the above analysis, the present invention is directed to a connection terminal connection structure and a processing method thereof, so as to solve the problems of low reliability, complex processing and large cable diameter at the connection position of the conventional connection terminal.
The purpose of the invention is mainly realized by the following technical scheme:
on one hand, the connecting structure of the wiring terminal comprises the wiring terminal, a wiring terminal heat-shrinkable sleeve, a protective heat-shrinkable sleeve in a wire shielding layer, the wire shielding layer and the shielding heat-shrinkable sleeve; the wire core wire of the wire to be connected sequentially comprises a wire insulating layer, a protective heat-shrinkable sleeve in the wire shielding layer and a wire shielding layer from inside to outside; the wiring terminal heat-shrinkable sleeve is sleeved outside the wiring terminal and envelops the wire insulation layers at the two ends of the wiring terminal; the shielding heat-shrinkable sleeve is sleeved outside the wiring terminal heat-shrinkable sleeve and envelops the sleeving length of the wire shielding layers at the two ends of the wiring terminal.
Further, the distances between the end faces of the wire insulating layer and the wire shielding layer, which are used for protecting the heat-shrinkable sleeve and the wire shielding layer, and the end faces of the wiring terminal are sequentially increased.
Furthermore, an optical copper wire is bound on the lead shielding layer, and the optical copper wire is a silver-plated copper wire.
Furthermore, the wiring terminal is provided with a cavity for the core wire of the wire to be led to penetrate; the wiring terminal is provided with an observation hole, and whether the conductor core wire is installed in place or not is observed through the observation hole.
Further, the quantity of inspection hole is 2, sets up the heart yearn between two inspection holes and supports and lean on the portion, and the heart yearn supports to lean on the portion to set up in binding post's centre, divide into first cavity and second cavity with binding post's cavity.
Further, the shielding heat-shrinkable sleeve is a combination of polyolefin conductive cloth.
Furthermore, the length of the wire core exposed out of the wiring terminal is A, the length of the observation hole is B, the lengths of the first cavity and the second cavity are both C, and the length of the wire core exposed out of the wire insulation layer at the end part of the wire is A + B + C; the length of the wire insulation layers on the two sides of the wiring terminal enveloped by the thermal shrinkage bush of the wiring terminal is D; the distance from the end face of the connecting terminal heat-shrinkable sleeve to the end face of the heat-shrinkable sleeve in the wire shielding layer is E, the distance from the end face of the heat-shrinkable sleeve in the wire shielding layer to the end face of the wire shielding layer is F, and the distance from the end point of the wire insulating layer to the end face of the connecting terminal is A + D + E + F.
Further, the length A is less than 0.8mm, the length A + D + E + F is 25 +/-2 mm, and the length F is 13 +/-2 mm;
the position of the optical copper wire binding wire shielding layer is 2mm-3mm away from the end face of the wire shielding layer; the length difference between the shielding heat-shrinkable sleeve and the wiring terminal is 60 +/-2 mm, and the lengths of the wire shielding layers at the two ends of the shielding heat-shrinkable sleeve enveloping the wiring terminal are 10 +/-5 mm.
In another aspect, a method for processing a connecting structure of a connecting terminal is provided, which includes the following steps:
the method comprises the following steps: performing head removing treatment on the end heads of the two wires to be connected to leak the core wires of the wires; penetrating the leaked wire core wire into the inner cavity of the wiring terminal, and observing whether the wire core wire is in place through the observation hole;
step two: sleeving a wiring terminal heat-shrinkable sleeve on the wiring terminal, wrapping the wiring terminal heat-shrinkable sleeve on the wiring terminal and the wire insulation layers on two sides of the wiring terminal, and performing heat-shrinking treatment on the wiring terminal heat-shrinkable sleeve;
step three: the wires at the two sides of the wiring terminal are sequentially sleeved with a wire shielding layer inner protective heat-shrinkable sleeve and a wire shielding layer, and the distances between the end surfaces of the wire insulating layer, the wire shielding layer inner protective heat-shrinkable sleeve and the wire shielding layer and the end surface of the wiring terminal are sequentially increased;
step four: and sleeving the shielding heat-shrinkable sleeve outside the wiring terminal heat-shrinkable sleeve, enveloping the sleeving length of the wire shielding layers at the two ends of the wiring terminal, and performing heat-shrinkable treatment on the shielding heat-shrinkable sleeve to complete the connection of the wiring terminal.
Further, before the fourth step, a step of fastening a wire shielding layer is further included, specifically: and (4) at a certain distance from the end face of the wire shielding layer, winding with a smooth copper wire and then carrying out tin hanging treatment.
Compared with the prior art, the invention has at least one of the following beneficial effects:
a) the connecting structure of the wiring terminal adopts the heat-shrinkable sleeve with the double-layer structure, particularly, a wire to be connected is sequentially sleeved with the heat-shrinkable sleeve protected in the wire shielding layer and the wire shielding layer, the distances between the end surfaces of the wire insulating layer and the heat-shrinkable sleeve protected in the wire shielding layer and the end surface of the wiring terminal are sequentially increased, and the heat shrinkage of the heat-shrinkable sleeve of the wiring terminal outside the wiring terminal enables the wiring terminal, the heat-shrinkable sleeve protected in the wire shielding layer and the wire to be integrated, so that the connection reliability of the wiring terminal is improved; the shielding heat-shrinkable sleeve is sleeved outside the wiring terminal heat-shrinkable sleeve, the length of the shielding layers of the wires at the two ends of the wiring terminal is enveloped, the continuity of the shielding layers is guaranteed by the shielding heat-shrinkable sleeve, and the reliability of the wiring terminal structure is improved by the double-layer structure heat-shrinkable sleeve.
b) According to the connecting structure of the wiring terminal, the fixation of the two ends of the wiring terminal is reinforced through binding of the optical copper wires, the processing quality of the wiring terminal is guaranteed, and the connecting structure of the wiring terminal is more reliable.
c) The connecting terminal connecting structure accurately designs the sizes of the wire core wire, the wire insulating layer and the protective heat-shrinkable sleeve in the wire shielding layer, the wire shielding layer and the optical copper wire, so that the processing process of the connecting terminal is more effective and reliable, the diameter of a cable at a connecting part is smaller, and the maximum diameter is less than three-fourth of the diameter of a wire cross-over connection.
d) According to the connecting structure of the wiring terminal, the cavity for the core wire of the wire to penetrate through is formed in the wiring terminal, the two observation holes are formed in the middle of the wiring terminal, the core wire abutting portion is arranged between the two observation holes, whether the core wire of the wire reaches the designated position or not can be observed through the observation holes, the same length of the core wires of the wires at two ends of the wiring terminal penetrating into the wiring terminal can be ensured, the problem that the lengths of the core wires of the wires at two sides penetrating into the wiring terminal are inconsistent is avoided, the symmetry of the connecting structure of the wiring.
e) The shielding heat-shrinkable sleeve is adopted as the combination of the polyolefin conductive cloth, so that the cable has high-frequency electromagnetic shielding performance (100kHz is-61.763 dB), and has the functions of flame retardance and fluid resistance.
f) According to the processing method of the connecting structure of the wiring terminal, the design of the heat-shrinkable sleeve with the double-layer structure is adopted in the processing process, the continuity of the shielding layer is improved, the connecting structure of the wiring terminal is more reliable, the processing steps are simple, one third of time is saved compared with the overline splicing, and the operation is easier.
g) According to the processing method of the connecting structure of the wiring terminal, the wire to be connected is sequentially sleeved with the protective heat-shrinkable sleeve in the wire shielding layer and the wire shielding layer, and the distances between the end surfaces of the wire insulating layer and the protective heat-shrinkable sleeve in the wire shielding layer and the end surface of the wiring terminal are sequentially increased; the size of protection heat shrinkage bush, wire shielding layer and smooth copper line in wire heart yearn, wire insulating layer, the wire shielding layer has accurately designed, and above-mentioned setting makes binding post junction cable diameter littleer.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
Fig. 1 is a schematic view of a connection terminal connection structure according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a connection terminal in an embodiment of the invention.
Reference numerals:
1-a metal connection terminal; 2-connecting terminal heat-shrinkable tubing; 3-protecting the heat-shrinkable sleeve in the wire shielding layer; 4-a wire shielding layer; 5-shielding heat-shrinkable tubing; 6-optical copper wire; 7-a wire core; 8-a wire insulation layer; 9-Observation hole.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Example 1
A specific embodiment of the present invention discloses a connection terminal connection structure, as shown in fig. 1 to 2, including a connection terminal 1, a connection terminal heat-shrinkable sleeve 2, a protective heat-shrinkable sleeve 3 in a wire shielding layer, a wire shielding layer 4 and a shielding heat-shrinkable sleeve 5; the wiring terminal 1 is of a cavity structure, and a wire core wire 7 of a wire to be connected penetrates through the cavity of the wiring terminal 1. The lead to be connected is sequentially sleeved with a lead shielding layer inner protective heat-shrinkable sleeve 3 and a lead shielding layer 4, namely a lead core wire 7 sequentially comprises a lead insulating layer 8, the lead shielding layer inner protective heat-shrinkable sleeve 3 and the lead shielding layer 4 from inside to outside, the distances between the end surfaces of the lead insulating layer 8, the lead shielding layer inner protective heat-shrinkable sleeve 3 and the lead shielding layer 4 and the end surface of the wiring terminal 1 are sequentially increased, and an optical copper wire 6 is bound on the lead shielding layer 4; the wiring terminal heat-shrinkable sleeve 2 is sleeved outside the wiring terminal 1 and envelops the wire insulation layers 8 at the two ends of the wiring terminal 1; the shielding heat-shrinkable sleeve 5 is sleeved outside the wiring terminal heat-shrinkable sleeve 2, and the wire shielding layers 4 at the two ends of the enveloping wiring terminal are sleeved with lengths, that is, the lengths of the wire shielding layers 4 at the two ends of the wiring terminal are sleeved with lengths.
In this embodiment, binding post 1 is the metal material, and binding post 1's middle part is equipped with the observation hole, observes through the observation hole whether wire heart yearn 7 installs and targets in place.
In order to improve the installation efficiency of the lead core wire 7 penetrating into the wiring terminal 1 and ensure that the lead core wire 7 can quickly penetrate into the cavity of the wiring terminal 1 and reach a designated position, as shown in figure 2, the number of the observation holes 9 is 2, a core wire abutting part is arranged between the two observation holes 9, the core wire abutting part is arranged at the middle part of the wiring terminal 1, the abutting part separates the cavity of the wiring terminal 1 to form a first cavity and a second cavity which have the same structure, after the lead core wire 7 penetrates into the cavity at one side of the wiring terminal 1, the end part of the lead core wire 7 abuts against the core wire abutting part, the structure is arranged, not only can the observation holes 9 be used for observing whether the lead core wire 7 reaches the designated position, but also can ensure that the lengths of the lead core wires 7 at the two ends of the wiring terminal 1 are the, the symmetry of the connecting structure of the wiring terminal is ensured, and the uniformity of the performance of the wire is improved.
In this embodiment, as shown in fig. 1, by the heart yearn support portion to both sides direction, wire heart yearn 7, wire insulating layer 8, protect heat-shrinkable sleeve 3 in the wire shielding layer, wire shielding layer 4 and smooth copper line 6 are the echelonment and distribute at the section of wire heart yearn 7 axis one side, it is specific, wire insulating layer 8 leaks wire heart yearn 7 to go to the tip of wire, the length that leaks wire heart yearn 7 is greater than the length C of binding post 1's first cavity or second cavity, it is specific, wire heart yearn 7 exposes binding post 1 outside length and is a, the length of observation hole 9 is B, the length of first cavity and second cavity is C, the length that wire insulating layer 8 wire heart yearn 7 was gone to the tip of wire is a + B. The wiring terminal heat-shrinkable sleeve 2 is sleeved outside the wiring terminal 1, the length of the wiring terminal heat-shrinkable sleeve 2 is greater than that of the wiring terminal 1, the wiring terminal heat-shrinkable sleeve 2 envelopes the wire insulation layers 8 at two ends of the wiring terminal 1, and the lengths of the wire insulation layers 8 at two sides of the wiring terminal 1 are both D; the distance between the end face of the wiring terminal heat-shrinkable sleeve 2 and the end face of the heat-shrinkable sleeve 3 in the wire shielding layer is E, the distance between the end face of the heat-shrinkable sleeve 3 in the wire shielding layer and the end face of the wire shielding layer 4 is F, and the distance between the end point of the shielding wire of the wire insulating layer 4 and the end face of the wiring terminal 1 is A + D + E + F.
In this embodiment, the optical copper wire 6 is a silver-plated copper wire, and the periphery of the optical copper wire is coated with tin after being tightly wound several turns at a position away from the end of the wire shielding layer 4.
In this embodiment, the shielding heat shrinkable sleeve 5 is a shrinkable and deformable polyethylene tube, and preferably adopts a combination of polyolefin conductive fabrics, so that the shielding heat shrinkable sleeve not only has high-frequency electromagnetic shielding performance (100kHz is-61.763 dB), but also has flame retardant and fluid-resistant functions.
Because binding post is in the course of working, the wire is shelled first and crimping size control, will directly influence its reliability, and the best size parameter is in this embodiment: the length A of the lead core wire 7 exposed out of the connecting terminal 1 is less than 0.8 mm; the distance between the end face of the shielded wire of the wire insulating layer 4 and the end face of the wiring terminal 1 is 25 +/-2 mm, wherein the distance between the end face of the heat-shrinkable sleeve 3 protected in the wire shielding layer and the end face of the wire shielding layer 4 is 13 +/-2 mm; the position of the optical copper wire 6 binding the wire shielding layer 4 is 2-3mm away from the end surface of the wire shielding layer 4, and the periphery is tinned after 4-6 circles of close winding by using a TR-0.5 silver-plated copper wire; the length difference between the shielding heat-shrinkable sleeve 5 and the wiring terminal 1 is 60 +/-2 mm, the shielding heat-shrinkable sleeve 5 is sleeved outside the wiring terminal heat-shrinkable sleeve 2, and the lengths of the wire shielding layers 4 enveloping the two ends of the wiring terminal are 10 +/-5 mm. The diameter of the cable at the connecting position of the wiring terminal can be reduced by setting the parameters.
In this embodiment, in order to guarantee connection structure's reliability, when many wires crimping was in binding post 1 with one end, broken up the heart yearn of many wires and twisted all heart yearns, then sent into and carry out the crimping in binding post 1, prevented that the broken string from damaging some wires. When a plurality of wires are in press-connection with the same end of the wiring terminal 1, the sectional area of each wire needs to be controlled, the section of a wire core of a wire with a smaller section in the plurality of wires is not less than 60% of the section of a wire core of a wire with a larger section, otherwise, the thinner wire is easy to break, and the normal work of a product is affected.
When the method is implemented, the end heads of two wires to be connected are subjected to head removal treatment, the wire core wires 7 leak out, the leaked wire core wires 7 penetrate into an inner cavity of the wiring terminal 1, and whether the wire core wires 7 are in place or not is observed through the observation holes 9; sleeving a wiring terminal heat-shrinkable sleeve 2 on a wire on one side to enable the wiring terminal heat-shrinkable sleeve 2 to wrap a wiring terminal 1, and enveloping the sleeving length of wire insulating layers 8 on two sides of the wiring terminal 1, if the sleeving length is 10 +/-5 mm, performing heat-shrinking treatment on the wiring terminal heat-shrinkable sleeve 2 to enable the wiring terminal heat-shrinkable sleeve 2 to wrap the wiring terminal 1 and the wire insulating layers 8 on two sides of the wiring terminal 1; the lead at two sides of the wiring terminal 1 is sequentially sleeved with a protective heat-shrinkable sleeve 3 in a lead shielding layer and a lead shielding layer 4, and the distances between the end surfaces of the lead insulating layer 8, the protective heat-shrinkable sleeve 3 in the lead shielding layer and the lead shielding layer 4 and the end surface of the wiring terminal 1 are sequentially increased; at a certain distance from the end face of the wire shielding layer 4, winding by using a smooth copper wire 6 and then carrying out tin coating treatment on the whole body; and sleeving the shielding heat-shrinkable sleeve 5 outside the wiring terminal heat-shrinkable sleeve 2, enveloping the lead shielding layers 4 at the two ends of the wiring terminal to be sleeved by length, and performing heat-shrinkable treatment on the shielding heat-shrinkable sleeve 5 to finish the connection of the wiring terminal.
Compared with the prior art, the connecting structure of the wiring terminal provided by the invention has the following beneficial effects:
(1) the thermal shrinkage bush with the double-layer structure is adopted, a cavity for a lead core wire 7 to penetrate is arranged on the wiring terminal 1, a lead shielding layer inner protective thermal shrinkage bush 3 and a lead shielding layer 4 are sequentially sleeved on a lead to be connected, the distances between the end surfaces of the lead insulating layer 8, the lead shielding layer inner protective thermal shrinkage bush 3 and the lead shielding layer 4 and the end surface of the wiring terminal 1 are sequentially increased, and the thermal shrinkage bush 2 of the wiring terminal outside the wiring terminal 1 is subjected to thermal shrinkage, so that the wiring terminal 1, the lead shielding layer inner protective thermal shrinkage bush 3 and the lead are integrated, and the connection reliability of the wiring; outside binding post heat-shrinkable tube 2 was located to shielding heat-shrinkable tube 5 cover to the length is cup jointed to the wire shielding layer 4 at envelope binding post both ends, and shielding heat-shrinkable tube 5 has guaranteed the continuity of shielding layer, and bilayer structure heat-shrinkable tube's structure setting has improved the reliability of binding post structure.
(2) The fixation of the two ends of the wiring terminal 1 is bound and reinforced through the optical copper wire 6, the processing quality of the wiring terminal 1 is guaranteed, and the connection structure of the wiring terminal is more reliable.
(3) The sizes of the wire core wire 7, the wire insulating layer 8, the heat-shrinkable sleeve 3 for protecting in the wire shielding layer, the wire shielding layer 4 and the optical copper wire 6 are accurately designed, and the length of A, B, C, D, E, F sections needing to be controlled in fig. 1 is specifically determined, so that the processing process of the wiring terminal is more effective and more reliable, and the diameter of a cable at the joint is smaller.
(4) Binding post 1's intermediate position sets up two observation holes 9, sets up the heart yearn between two observation holes 9 and supports to the portion, not only can observe whether wire heart yearn 7 reaches the assigned position through observation hole 9, can also guarantee that binding post 1 both ends wire heart yearn 7 penetrates binding post 1's length the same, avoids penetrating binding post 1's length inconsistency because of both sides wire heart yearn 7, guarantees binding post connection structure's symmetry, improves the homogeneity of wire performance.
(5) The shielding heat-shrinkable sleeve 5 is a combination of polyolefin conductive cloth, so that the cable has high-frequency electromagnetic shielding performance (100kHz is-61.763 dB), and has the functions of flame retardance and fluid resistance.
Example 2
The invention further discloses a processing method of the connecting structure of the wiring terminal in the embodiment 1, which specifically comprises the following steps:
the method comprises the following steps: the end heads of the two wires to be connected are subjected to head removal treatment, and a wire core wire 7 is leaked out; the leaked wire core wire 7 is penetrated into the inner cavity of the terminal 1, and whether the wire core wire 7 is in place is observed through the observation hole 9. The end-off length, namely the length of the insulation layer of the lead at the end of the thermal release lead is A + B + C, and the lead after end treatment is ensured to have no damage, no broken wire, no residue adhesion, no corrosion and no scattered wire to the core wire 7 of the lead.
Step two: the wiring terminal heat-shrinkable sleeve 2 is sleeved on the wiring terminal 1, so that the wiring terminal heat-shrinkable sleeve 2 wraps the wiring terminal 1 and the wire insulation layers 8 on the two sides of the wiring terminal 1, and the wiring terminal heat-shrinkable sleeve 2 is subjected to heat-shrinkable treatment. Specifically, after the core wire 7 is installed in place, the wire heat-shrinkable sleeve 2 is sleeved on the wire on one side, so that the wire heat-shrinkable sleeve 2 wraps the wire connecting terminal 1, the wire insulating layers 8 on the two sides of the wire connecting terminal 1 are wrapped by the wire insulating layers 8 on the two sides of the wire connecting terminal, and the wire heat-shrinkable sleeve 2 is subjected to heat-shrinkable treatment, so that the wire heat-shrinkable sleeve 2 wraps the wire connecting terminal 1 and the wire insulating layers 8 on the two sides of the.
Step three: the wire insulation layer 8, the protective heat-shrinkable sleeve 3 in the wire shielding layer and the distance between the end surface of the wire shielding layer 4 and the end surface of the wiring terminal 1 are sequentially increased.
Step four: and sleeving the shielding heat-shrinkable sleeve 5 outside the wiring terminal heat-shrinkable sleeve 2, enveloping the lead shielding layers 4 at the two ends of the wiring terminal to be sleeved by length, and performing heat-shrinkable treatment on the shielding heat-shrinkable sleeve 5 to finish the connection of the wiring terminal.
In this embodiment, before the fourth step, a step of fastening the wire shielding layer 4 is further included, specifically, at a certain distance from the end face of the wire shielding layer 4, the smooth copper wire 6 is wound around and then subjected to a tin hanging treatment.
In this embodiment, in the course of working of binding post structure, the wire is shelled first and crimping size control will directly influence its reliability, and the best dimensional parameter of confirming in the course of working is:
in the first step, when the end of the wire is subjected to head removing treatment, the length A of the wire core wire 7 exposed outside the wiring terminal 1 is less than 0.8 mm.
In the third step, when the wire at the two sides of the connecting terminal 1 is sequentially sleeved with the wire shielding layer inner protective heat-shrinkable sleeve 3 and the wire shielding layer 4, the distance from the end point of the shielding wire of the wire insulating layer 4 to the end surface of the connecting terminal 1 is A + D + E + F and is 25 +/-2 mm, wherein the distance from the end surface of the protective heat-shrinkable sleeve 3 in the wire shielding layer to the end surface of the wire shielding layer 4 is F and is 13 +/-2 mm; the position of the optical copper wire 6 binding the wire shielding layer 4 is 2-3mm away from the end surface of the wire shielding layer 4, and the periphery is coated with tin after 4-6 circles of close winding by using a TR-0.5 silver-plated copper wire.
In the fourth step, when selecting the shielding heat-shrinkable tube 5 with the proper length, the length of the shielding heat-shrinkable tube 5 is greater than that of the wiring terminal 1, the length difference between the shielding heat-shrinkable tube 5 and the wiring terminal 1 is 60 +/-2 mm, the selected shielding heat-shrinkable tube 5 is sleeved outside the wiring terminal heat-shrinkable tube 2, the lengths of the wire shielding layers 4 at the two ends of the wiring terminal are enveloped, namely the sleeving length is 10 +/-5 mm, then the shielding heat-shrinkable tube 5 is subjected to heat-shrinking treatment, and the processing of the wiring terminal structure is completed.
In this embodiment, the connection terminal connection structure may be used to connect a plurality of wires, and when connecting a plurality of wires, the following requirements are imposed on the shapes and cross-sectional areas of the plurality of wires:
when a plurality of wires are in compression joint at the same end of the wiring terminal 1, core wires of the plurality of wires are scattered to twist all the core wires, and then the core wires are sent into the wiring terminal 1 to be in compression joint, so that the wires are prevented from being broken and damaging partial wires.
When a plurality of wires are in press connection with the same end of the wiring terminal 1, the sectional area of each wire needs to be controlled, and the section of a wire core of a wire with a smaller section in the plurality of wires is not less than 60% of the section of a wire core of the wire with a larger section. Otherwise, the thin wires are easy to break, and the normal work of the product is affected.
Compared with the prior art, the connection method of the connection structure of the wiring terminal provided by the embodiment has the following beneficial effects:
(1) the heat-shrinkable sleeve with the double-layer structure is adopted, a wire shielding layer inner protective heat-shrinkable sleeve 3 and a wire shielding layer 4 are sequentially sleeved on a wire to be connected, the distances between the end surfaces of the wire insulating layer 8, the wire shielding layer inner protective heat-shrinkable sleeve 3 and the wire shielding layer 4 and the end surface of the wiring terminal 1 are sequentially increased, and the heat shrinkage of the wiring terminal heat-shrinkable sleeve 2 outside the wiring terminal 1 enables the wiring terminal 1, the wire shielding layer inner protective heat-shrinkable sleeve 3 and the wire to be integrated, so that the connection reliability of the wiring terminal 1 is improved; the shielding heat-shrinkable sleeve 5 is sleeved outside the wiring terminal heat-shrinkable sleeve 2, the wire shielding layers 4 at the two ends of the enveloping wiring terminal are sleeved with lengths, the shielding heat-shrinkable sleeve 5 ensures the continuity of the shielding layers, the wiring terminal connection structure is more reliable, the whole processing step is simple, one third of time is saved compared with the overline splicing, and the operation is easier.
(2) The fixation of the two ends of the wiring terminal 1 is bound and reinforced through the optical copper wire 6, the processing quality of the wiring terminal 1 is guaranteed, and the connection structure of the wiring terminal is more reliable.
(3) In the course of working, the size of accurate design wire heart yearn 7, wire insulating layer 8, the interior protection heat shrinkage bush 3 of wire shielding layer, wire shielding layer 4 and smooth copper line 6 has specifically confirmed the length of the A, B, C, D, E, F sections that need control in figure 1, envelops the shielding layer at binding post 1 both ends completely through shielding heat shrinkage bush 5 to make binding post course of working more effective, more reliable, the junction cable diameter is littleer moreover, and the maximum diameter is less than three fourths of wire cross-over diameter.
(4) Whether two observation holes 9 that set up through binding post 1 intermediate position observe wire heart yearn 7 and penetrate to the assigned position, simple to operate is swift, guarantees that binding post 1 both ends wire heart yearn 7 penetrates binding post 1's length the same, avoids guaranteeing binding post connection structure's symmetry because of the length inconsistency that both sides wire heart yearn 7 penetrated binding post 1, improves the homogeneity of wire performance.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (3)
1. A connecting structure of a wiring terminal is characterized by comprising a wiring terminal (1), a wiring terminal heat-shrinkable sleeve (2), a protective heat-shrinkable sleeve (3) in a wire shielding layer, a wire shielding layer (4) and a shielding heat-shrinkable sleeve (5);
the lead to be connected comprises an inner lead core wire (7) and an outer lead insulating layer (8), and the lead to be connected is sequentially sleeved with a protective heat-shrinkable sleeve (3) in the lead shielding layer and a lead shielding layer (4);
the wiring terminal heat-shrinkable sleeve (2) is sleeved outside the wiring terminal (1) and envelops the wire insulation layers (8) at the two ends of the wiring terminal (1);
the shielding heat-shrinkable sleeve (5) is sleeved outside the wiring terminal heat-shrinkable sleeve (2) and envelops the sleeving length of the wire shielding layers (4) at the two ends of the wiring terminal, and the lengths of the wire shielding layers (4) at the two ends of the wiring terminal at the two ends of the shielding heat-shrinkable sleeve (5) are the sleeving length;
the distances between the end surfaces of the wire insulating layer (8), the protective heat-shrinkable sleeve (3) in the wire shielding layer and the wire shielding layer (4) and the end surface of the wiring terminal (1) are sequentially increased;
an optical copper wire (6) is bound on the lead shielding layer (4), and the optical copper wire (6) is a silver-plated copper wire;
the wiring terminal (1) is provided with a cavity for the wire core wire (7) to penetrate;
the wiring terminal (1) is provided with an observation hole (9), and whether the lead core wire (7) is installed in place or not is observed through the observation hole (9);
the number of the observation holes (9) is 2, a core wire abutting part is arranged between the two observation holes (9), the core wire abutting part is arranged in the middle of the wiring terminal (1), and a cavity of the wiring terminal (1) is divided into a first cavity and a second cavity;
the shielding heat-shrinkable sleeve (5) is a combination of polyolefin conductive cloth;
the length of the lead core wire (7) exposed out of the wiring terminal (1) is A, the length of the observation hole (9) is B, the lengths of the first cavity and the second cavity are both C, and the length of the end part of the lead exposed out of the lead core wire (7) through the lead insulating layer (8) is A + B + C;
the length of the wire insulation layers (8) on the two sides of the terminal (1) enveloped by the terminal thermal shrinkage bush (2) is D; the distance from the end face of the wiring terminal heat-shrinkable sleeve (2) to the end face of the protective heat-shrinkable sleeve (3) in the wire shielding layer is E, the distance from the end face of the protective heat-shrinkable sleeve (3) in the wire shielding layer to the end face of the wire shielding layer (4) is F, and the distance from the end face of the wire shielding layer (4) to the end face of the wiring terminal (1) is A + D + E + F;
the length A is less than 0.8mm, the length A + D + E + F is 25 +/-2 mm, and the length F is 13 +/-2 mm;
the position of the optical copper wire (6) binding the wire shielding layer (4) is 2mm-3mm away from the end surface of the wire shielding layer (4);
the length difference between the shielding heat-shrinkable sleeve (5) and the wiring terminal (1) is 60 +/-2 mm.
2. A method of processing a terminal connecting structure according to claim 1, comprising the steps of:
the method comprises the following steps: the end heads of the two wires to be connected are subjected to head removal treatment, and the wire core wires (7) are leaked out; penetrating the leaked lead core wire (7) into an inner cavity of the wiring terminal (1), and observing whether the lead core wire (7) is in place through the observation hole (9);
step two: sleeving a wiring terminal heat-shrinkable sleeve (2) on the wiring terminal (1), so that the wiring terminal heat-shrinkable sleeve (2) wraps the wiring terminal (1) and the wire insulating layers (8) on the two sides of the wiring terminal (1), and performing heat-shrinkage treatment on the wiring terminal heat-shrinkable sleeve (2);
step three: the lead at two sides of the wiring terminal (1) is sequentially sleeved with a protective heat-shrinkable sleeve (3) in the lead shielding layer and the lead shielding layer (4), and the distances between the end surfaces of the lead insulating layer (8), the protective heat-shrinkable sleeve (3) in the lead shielding layer and the lead shielding layer (4) and the end surface of the wiring terminal (1) are sequentially increased;
step four: and sleeving a shielding heat-shrinkable sleeve (5) outside the wiring terminal heat-shrinkable sleeve (2), sleeving the wire shielding layers (4) at the two ends of the enveloping wiring terminal by length, and performing heat-shrinkable treatment on the shielding heat-shrinkable sleeve (5) to finish the connection of the wiring terminal.
3. The processing method of the connection terminal connecting structure according to claim 2, characterized in that before the fourth step, a step of fastening the wire shielding layer (4) is further included, specifically: and at a certain distance from the end face of the wire shielding layer (4), winding by using a smooth copper wire (6) and then carrying out tin hanging treatment.
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| EP3467960B1 (en) * | 2017-10-09 | 2022-03-09 | MD Elektronik GmbH | Electric plug connector |
| CN109286083A (en) * | 2018-09-28 | 2019-01-29 | 乐清市华仪电缆附件有限公司 | A kind of three-core cable welded joint and its mounting process |
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