WO2014129600A1 - Faisceau de conducteurs, procédé permettant de raccorder un contact et un câble enrobé, et structure de faisceau de conducteurs - Google Patents

Faisceau de conducteurs, procédé permettant de raccorder un contact et un câble enrobé, et structure de faisceau de conducteurs Download PDF

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Publication number
WO2014129600A1
WO2014129600A1 PCT/JP2014/054234 JP2014054234W WO2014129600A1 WO 2014129600 A1 WO2014129600 A1 WO 2014129600A1 JP 2014054234 W JP2014054234 W JP 2014054234W WO 2014129600 A1 WO2014129600 A1 WO 2014129600A1
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WO
WIPO (PCT)
Prior art keywords
crimping
coated
wire
wire harness
terminal
Prior art date
Application number
PCT/JP2014/054234
Other languages
English (en)
Japanese (ja)
Inventor
博 折戸
泰 木原
幸大 川村
翔 外池
Original Assignee
古河電気工業株式会社
古河As株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 古河電気工業株式会社, 古河As株式会社 filed Critical 古河電気工業株式会社
Priority to JP2014512211A priority Critical patent/JP5654178B1/ja
Publication of WO2014129600A1 publication Critical patent/WO2014129600A1/fr

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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
    • H01R4/10—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/20—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping using a crimping sleeve
    • H01R4/203—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping using a crimping sleeve having an uneven wire-receiving surface to improve the contact
    • H01R4/206—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping using a crimping sleeve having an uneven wire-receiving surface to improve the contact with transversal grooves or threads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/2806—Protection against damage caused by corrosion
    • 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
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/048—Crimping apparatus or processes
    • H01R43/0488—Crimping apparatus or processes with crimp height adjusting means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/10—Sockets for co-operation with pins or blades
    • H01R13/11—Resilient sockets
    • H01R13/113—Resilient sockets co-operating with pins or blades having a rectangular transverse section
    • 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
    • H01R4/58—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 characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • 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
    • H01R43/005—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for making dustproof, splashproof, drip-proof, waterproof, or flameproof connection, coupling, or casing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

Definitions

  • the present invention relates to a wire harness used for an automobile or the like.
  • connection between an electric wire and a terminal in an automobile wire harness is generally a crimp bonding in which the electric wire is crimped with a terminal called an open barrel type.
  • a wire harness when moisture or the like adheres to the connection portion between the electric wire and the terminal, the oxidation of the metal surface used for the electric wire proceeds, and the resistance at the joint increases.
  • the metal used for an electric wire and a terminal differs, the corrosion between different metals will advance. The progress of the corrosion of the metal material in the connection portion causes cracks in the connection portion and contact failure, and thus cannot be affected by the product life.
  • wire harnesses in which the electric wires are made of an aluminum alloy and the terminals are made of a copper alloy are being put into practical use, and the problem of corrosion at the joints has become prominent.
  • the present invention has been made in view of such a problem, and can prevent moisture from adhering to a contact portion with an electric wire without using a resin material, and can simplify the manufacturing process.
  • An object is to provide a wire harness and the like.
  • the first invention is a wire harness in which a coated conductor and a terminal are connected, and the terminal includes a crimping portion to which the coated conductor is crimped, and a terminal body,
  • the crimping part has a coated crimping part that crimps the covering part and a conductive wire crimping part that crimps the conductive wire exposed from the covering part, and other parts are sealed except the part where the coated conductive wire is inserted.
  • the wire harness is characterized in that a protruding ridge is formed on the inner surface of the coated crimping portion.
  • the ridge portion is provided in an annular shape in the circumferential direction of the coated crimp portion.
  • the compression ratio of the coated crimping portion in the ridge portion is 45% to 90%.
  • the height of the protruding portion is not more than the thickness of the terminal.
  • the depth of the concave portion on the outer surface of the coated crimping portion corresponding to the protruding strip portion is at least partially 75% or less with respect to the thickness of the insulator of the non-crimped portion of the coated conductor before crimping. desirable.
  • the length in the longitudinal direction of the concave portion on the outer surface of the coated crimping portion corresponding to the convex strip portion is 0.20 mm to 0.90 mm.
  • the length in the longitudinal direction of the coated crimping part is preferably 2 mm or more.
  • the distance of the straight line portion from the rear end of the concave portion on the outer surface of the coated crimping portion corresponding to the convex strip portion to the end of the coated crimped portion is 0.5 mm or more.
  • the inner surface of the coated crimping portion may be formed with a recess in the mating portion of the mold at the time of crimping, and the radial dimension of the ridge may be greater than or equal to the recess.
  • a plurality of the ridges may be provided apart from each other in the longitudinal direction of the coated crimping part.
  • the pitch in the longitudinal direction of the plurality of ridges is 1.5 times or more the plate thickness of the terminal.
  • the pitch in the longitudinal direction of the plurality of ridges is preferably 0.5 mm to 2.0 mm.
  • the length in the longitudinal direction of the concave portion on the outer surface of the coated crimping portion corresponding to the convex strip portion ⁇ the number of the convex strip portions is 1 ⁇ 2 or less of the length in the longitudinal direction of the coated crimped portion. .
  • the lead wire may be made of an aluminum-based material, and the lead wire crimping portion may be made of a copper-based material.
  • the lead wire crimping portion of the crimp terminal is crimped to the conductor exposed portion of the electric wire
  • the coated crimp portion is crimped to the insulating coating portion
  • the protruding crimp portion is further provided on the coated crimp portion. Intrusion of moisture can be prevented without using and moisture can be prevented from adhering to the contact portion between the electric wire and the crimp terminal. Further, the manufacturing process can be simplified correspondingly, and the cost increase correspondingly can be suppressed.
  • the ridge portion is provided in a ring shape in the circumferential direction of the insulating coating portion, it can be kept watertight in the entire circumferential direction.
  • the water stoppage can be surely ensured by setting the compression ratio of the coated crimping portion in the ridge to 45% to 90%.
  • the height of the ridge is set to be equal to or less than the plate thickness of the terminal, it is possible to suppress the coating crimping portion from being thinned in the ridge.
  • the depth of the concave portion on the outer surface of the coated crimping portion corresponding to the convex strip portion is 75% or less with respect to the thickness of the insulator of the non-crimped portion of the coated conductor before crimping, While obtaining an effect reliably, the tearing of an insulator can be suppressed.
  • the coated portion can be reliably held.
  • the length in the longitudinal direction of the coated crimping portion is 3 mm or less, it is possible to prevent the terminals from becoming longer than necessary.
  • the end of the coated crimped portion is a trumpet shape. It is possible to prevent the welded portion of the terminal from being cracked. That is, it is possible to ensure water stopping.
  • the radial dimension (height) of the ridge portion is equal to or greater than the size of the recess formed on the inner surface of the insulating coating portion, even when the recess is formed during crimping, the crimping by the recess formation is performed. It is possible to prevent a decrease in power.
  • the longitudinal pitch of the plurality of ridges is set to 0.5 mm to 2.0 mm, it is possible to reliably form a plurality of ridges without connecting the ridges, and for the terminals to It can suppress becoming longer than necessary.
  • the second invention is a method of connecting a terminal and a coated conductor, wherein the terminal has a crimping part to which the coated conductor is crimped, and a terminal body, and the crimping part is a covering part.
  • a protruding ridge part continuous in the circumferential direction is formed so as to protrude from the inner surface of the coating crimping part, and the covering crimping on the protruding stripe part
  • a method of connecting a terminal and a coated conductor, wherein the coated conductor is crimped by the coated crimping section so that the compression ratio of the section is
  • the coated portion can be reliably crimped to prevent water from entering the inside.
  • the crimping rate of the ridge portion is 45% to 90%, the covering portion can be reliably crimped without damaging the covering portion.
  • a third invention is a wire harness structure in which a plurality of wire harnesses are bundled, wherein the wire harness is connected to a covered conductor and a terminal, and the terminal is crimped to the covered conductor.
  • a crimping portion and a terminal body, and the crimping portion includes a covering crimping portion that crimps the covering portion and a conductor crimping portion that crimps a conductor exposed from the covering portion, and the covering conductor is inserted into the crimping portion.
  • the wire harness structure is characterized in that the other portions are sealed except for the portions to be formed, and protruding ridges are formed on the inner surface of the coated crimping portion.
  • a plurality of wire harnesses can be bundled and used.
  • the present invention it is possible to provide a wire harness or the like that can prevent moisture from adhering to a contact portion with an electric wire without using a resin material and can simplify the manufacturing process. .
  • FIG. 4 is a sectional view taken along line IV-IV in FIG. 3.
  • Explanatory drawing of the crimping method of a wire harness Sectional drawing when a crimping blade type
  • FIG. 5 is a partially enlarged view in the vicinity of the coated crimping portion in FIG. 4, and is a cross-sectional view when an electric wire insulator is also cut.
  • XI-XI sectional view taken on the line of FIG. FIG. 12 is a partially enlarged view of the vicinity of the cover crimping portion in FIG. 11, and is a cross-sectional view when the electric wire insulator is also cut.
  • Sectional drawing which shows the method of connecting a terminal and a covered conducting wire using the crimping tool 30a.
  • Sectional drawing which shows the state which connected the terminal and the covering conducting wire using the crimping tool 30a.
  • (A) is sectional drawing of the covering crimping part in FIG. 13
  • (b) is sectional drawing of the covering crimping part in FIG.
  • FIG. 15 is a partial cross-sectional enlarged view of a coated crimping portion, and is an enlarged view of a portion A in FIG. Outline explanatory drawing of an experimental method.
  • the perspective view which shows the form of another crimp terminal.
  • FIG. 1 is an exploded perspective view of the wire harness 1 and shows a state before caulking
  • FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
  • the wire harness 1 has a longitudinal direction X and a width direction Y orthogonal to the longitudinal direction X, and includes an electric wire 10 and a crimp terminal 20.
  • the electric wire 10 (covered conductive wire) includes an insulating coating portion 12 in which a conductive wire 16 is covered with an insulator 15 and a conductive wire exposed portion 11 in which a part of the conductive wire 16 is exposed from the distal end in the longitudinal direction X of the insulating coating portion 12.
  • Have The conducting wire 16 is made of an aluminum-based material such as aluminum or aluminum alloy, and more specifically, is formed by twisting a plurality of aluminum alloy wires or the like.
  • the crimp terminal 20 extends in the longitudinal direction X, and is a crimp that allows insertion of a male connector (not shown) located at the front end 20A in the longitudinal direction X and a wire 10 located at the rear end 20B. Part 22.
  • the box portion 21 includes an elastic contact piece 21A that comes into contact with the insertion tab of the male connector.
  • the crimping part 22 includes a lead crimping part 23 and a covering crimping part 24.
  • the conducting wire crimping portion 23 is located between the covering crimping portion 24 and the box portion 21.
  • the cover crimping part 24 has a hollow cross section extending in the longitudinal direction X so that the electric wire 10 can be inserted from the rear end part 20B while opening to the rear end part 20B.
  • the crimping terminal 20 is formed by punching a copper alloy strip such as brass whose surface is tin-plated into a flattened terminal shape (not shown), and then forming a box portion 21 of a hollow quadrangular prism body and a crimping portion 22 of a hollow cylindrical body.
  • the sealing portion 26 is formed by bringing the inner surfaces of the crimping portion 22 into contact with each other and being joined in a watertight manner.
  • the sealing part 26 joins a part of site
  • the upper and lower metals are brought into surface contact by a predetermined length in the longitudinal direction of the terminal, and the approximate center in the longitudinal direction is joined. That is, the portions other than the end portion of the overlapping portion are joined.
  • a joining method for example, pressure bonding or laser welding can be used.
  • the crimping part 22 is joined in a watertight manner by a joining part 29 extending in the longitudinal direction X.
  • the end portions of the copper alloy strip punched into the terminal shape can be butted together so as to form a hollow shape, and the joined portion 29 can be formed by welding such as laser welding.
  • the covering pressure-bonding portion 24 is formed with a ridge portion 25 protruding inward in the radial direction.
  • the ridge portion 25 is formed in an annular shape in the circumferential direction of the covering crimp portion 24.
  • the protrusion 25 may be provided when a terminal is formed in the pressing process, and laser welding may be performed thereafter, or may be provided during the crimping process of the electric wire 10 and the crimp terminal 20.
  • the ridges 25 are provided in advance in the pressing process, there is a risk that the wire 10 may be disturbed when inserted into the crimp terminal 20.
  • FIG. 3 shows the crimping terminal 20 and the crimped crimping part 24 crimped radially inward after inserting the electric wire 10
  • FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3.
  • the electric wire 10 is inserted so that the conductive wire exposed portion 11 of the electric wire 10 is located in the conductive wire crimping portion 23 and the insulating coating portion 12 is located in the covering crimping portion 24.
  • the dimension in the longitudinal direction X of the crimping part 22 is larger than the dimension in the longitudinal direction X of the conductor exposed part 11. Therefore, when the electric wire 10 is inserted into the crimping part 22, the conductive wire exposed part 11 and the insulating coating part 12 are positioned facing the inner periphery of the crimping part 22.
  • the conductor crimping part 23 and the conductor 16 of the conductor exposing part 11 are crimped and insulated from the coating crimping part 24.
  • the insulator 15 of the covering portion 12 is pressure bonded.
  • the protruding crimp portion 24 is provided in the covering crimping portion 24, when the crimping portion 22 is caulked, a part of the insulating coating portion 12 is crimped by the protruding stripe portion 25 with a stronger force than the other portions, and the insulating coating is formed.
  • a high pressure bonding portion 13 is formed on the insulator 15 of the portion 12.
  • FIG. 5 is an explanatory diagram of a method for crimping the wire harness 1.
  • the crimping tool 30 includes an upper blade mold 31 and a lower blade mold 32.
  • the upper blade mold 31 has a semi-cylindrical cavity extending in the longitudinal direction X, corresponds to the coating crimping portion 24, and has a large-diameter portion 34 having a radius slightly smaller than the radius of the coating crimping portion 24, and lead crimping A small-diameter portion 33 corresponding to the portion 23 and having a smaller radius than the large-diameter portion 34.
  • the lower blade mold 32 has a semi-cylindrical cavity extending in the longitudinal direction X, and the radius of any part corresponding to the conductor crimping part 23 and the covering crimping part 24 is the same.
  • FIG. 6 is a cross-sectional view of the large-diameter portion 34 of the crimping tool 30.
  • the lower blade mold 32 in a state of being engaged with the upper blade mold 31 is indicated by a virtual line.
  • the radius of the lower blade mold 32 is slightly smaller than the radius of the large diameter portion 34 of the upper blade mold 31, and when the wire harness 1 is crimped with the crimping tool 30, the upper blade mold is used.
  • the lower blade mold 32 meshes with the inner side of 31.
  • the inner surface of the upper blade mold 31 and the inner surface of the lower blade mold 32 are substantially circular. Since the diameter at this time is smaller than the cover crimping part 24 before caulking, it is pressed so as to reduce the diameter of the cover crimping part 24 by caulking, Can be crimped.
  • the diameter of the space formed by the inner surface of the small diameter portion 33 of the upper blade die 31 of the crimping tool 30 and the inner surface of the lower blade die 32 is smaller than the diameter of the conductor crimping portion 23 and is added. It is smaller than the diameter of the coated crimping part 24 after tightening. Therefore, the conducting wire crimping portion 23 is stronger than the covering crimping portion 24.
  • a hollow cylindrical shape extending in the longitudinal direction X is formed by the small diameter portion 33, but the shape is not limited to this.
  • various shapes can be employed. For example, a flat thing may be sufficient and the cross-sectional shape may become convex shape.
  • FIG. 7 is a diagram in which the electric wire 10 and the crimp terminal 20 are added to the enlarged view of the portion surrounded by VII of the crimp tool 30 of FIG.
  • a slight gap 35 is formed between the inner surface of the upper blade mold 31 and the outer surface of the lower blade mold 32 at the meshing portion of the upper blade mold 31 and the lower blade mold 32.
  • a stepped portion 36 may be formed in the cover crimping portion 24, moving toward the gap 35 so that the pressing force of the cover crimping portion 24 escapes.
  • the inner surface of the cover crimping portion 24 may be formed with a depression 14 on the radially outer side, and the crimping force at this portion is reduced, and the There is a concern that the aqueousity will decrease.
  • FIG. 8 is a perspective view when the vicinity of the coated crimping portion 24 of the wire harness 1 is enlarged.
  • the wire harness 1 may be formed with the step portion 36 and the recess 14 extending in the longitudinal direction X. 36 and at least a part of the recess 14 can be pressed radially inward. Therefore, at least at the position where the ridge portion 25 is provided, a decrease in the crimping force can be prevented, and moisture can be reliably prevented from entering from the rear end portion 20B of the crimp terminal 20.
  • FIG. 9 is an enlarged cross-sectional view of the ridge portion 25.
  • the dimension L1 in the longitudinal direction X of the ridge portion 25 is equal to or less than the thickness dimension L2 of the insulator 15 of the electric wire 10 in the portion not subjected to the pressing action at the crimping portion 22, and preferably It is below the thickness dimension of the insulator 15 in the part which has received the effect
  • the thickness dimension L2 of the insulator 15 in the portion not subjected to the pressing action at the crimping portion 22 is the thickness dimension of the insulator 15 in the exposed portion that is not inserted into the crimping portion 22. In other words, it is the thickness dimension of the insulator 15 before crimping.
  • the thickness dimension of the insulator 15 in the part which is receiving the action of the pressing force of the crimping part 22 is a part inserted into the crimping part 22 and is the thickness dimension of the insulator 15 after the crimping.
  • the insulator 15 has a thickness dimension smaller than that before press-bonding by press-bonding the press-bonding portion 22.
  • the insulator 15 of the covering crimping portion 24 can be provided with the high crimping portion 13 in which a high crimping force is applied annularly in the circumferential direction.
  • the ridge portion 25 protrudes so as to be substantially orthogonal to the insulator 15, and the insulator 15 having elasticity is bent sharply. Therefore, since the adhesive force between the insulator 15 and the ridge portion 25 is increased by the rapid bending, it is possible to prevent moisture from entering from the rear end portion 20B.
  • the insulator 15 is less likely to move in the longitudinal direction X, it is difficult for the electric wire 10 to be pulled out even when the electric wire 10 is pulled in the pulling direction from the rear end portion 20B.
  • compression-bonding force may fall by aged deterioration if the dimension L1 of the protruding item
  • the dimension L3 in the radial direction of the convex strip 25 is not less than the dimension L4 of the recess 14 formed in the insulating coating 12.
  • the dimension L4 of the recess 14 is the diameter from the ideal outer surface 17 that is the outer surface of the ideal insulator 15 where the recess 14 is not formed, to the maximum point where the distance from the ideal outer surface 17 is the largest when the recess 14 is formed. It is the dimension in a direction (refer FIG. 7). Therefore, it is possible to prevent the depression 14 from being partially pressed completely by the ridges 25 and the crimping force from being lowered by the depression 14. In addition, the more detailed appropriate shape of the protruding item
  • an electric wire having a conductor cross-sectional area of 0.75 sq (about 0.75 mm 2 ) has an insulating coating portion thickness of 0.2 mm
  • an electric wire having a conductor cross-sectional area of 2.5 sq is an insulating coating portion thickness. Is 0.35 mm
  • the conductor cross-sectional area of the electric wire with 8 sq has an insulation coating portion thickness of 0.8 mm.
  • the conducting wire 16 of the electric wire 10 is made of an aluminum-based material
  • the conducting wire crimping portion 23 of the crimp terminal 20 is made of a copper-based material.
  • Contact There is a possibility of electrolytic corrosion due to moisture adhering at the part where the different metal contacts, but in this embodiment, it is possible to prevent the penetration of moisture into the crimping part 22 and thus prevent electrolytic corrosion. Can do. Further, according to this embodiment, even if a material normally used as the material of the insulator 15 is used, it is possible to reliably prevent moisture from entering the crimping portion 22.
  • the cross-sectional shape of the ridge portion 25 is semicircular (see FIG. 9), but is not limited to this shape.
  • the cross-sectional shape may be a polygon such as a rectangle or a triangle.
  • the cross-sectional shape of the ridge portion 25 may be inclined with respect to an axis extending in parallel with the longitudinal direction X. That is, you may incline so that the diameter of the covering crimping
  • line part 25 may become large toward the rear-end part 20B side from the front-end part 20A side.
  • the cross-sectional shape of the ridge portion 25 does not have to be formed symmetrically with respect to the center line with respect to the longitudinal direction, and is oblique with respect to any direction in the longitudinal direction (with respect to the center line with respect to the longitudinal direction). Asymmetric).
  • the crimping tool 30 is crimped from the periphery of the crimping terminal 20 by two blade molds of the upper blade mold 31 and the lower blade mold 32, but may have three or more blade molds.
  • the crimping tool 30 having three blade types there is a possibility that the three recesses 14 are formed in the insulator 15 of the insulating coating portion 12.
  • FIG. 10 is a perspective view of the wire harness 1 of the second embodiment, showing a state after crimping
  • FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG.
  • the covering crimping portion 24 is provided with protruding strip portions 25A and 25B.
  • the ridge portions 25 ⁇ / b> A and 25 ⁇ / b> B are formed in a continuous annular shape in the circumferential direction of the crimping portion 22.
  • the ridge portions 25A and the ridge portions 25B are provided to be separated in the longitudinal direction X.
  • FIG. 12 is an enlarged perspective view of the ridges 25A and 25B.
  • the spacing dimension D1 between the protruding line part 25A and the protruding line part 25B is not more than 6 times the dimension D2 of the thickness of the insulator 15 of the electric wire 10.
  • the separation dimension D ⁇ b> 1 is measured between the inner ends of the protruding ridge portions 25 ⁇ / b> A and the protruding ridge portions 25 ⁇ / b> B.
  • the thickness dimension D2 of the insulator 15 refers to a dimension at a portion not subjected to the pressing action at the crimping portion 22. Specifically, it is the thickness dimension of the insulator 15 in the exposed portion that is not inserted into the crimping portion 22. In other words, it is the thickness dimension of the insulator 15 before crimping.
  • FIG. 13 is a diagram illustrating a method of connecting the electric wire 10 and the crimp terminal 20 using the crimp tool 30a.
  • the crimping tool 30 a has a convex portion 37 for forming the convex strip portions 25 ⁇ / b> A and 25 ⁇ / b> B. That is, as described above, the method shown in FIG. 13 does not crimp the crimp terminal 20 on which the projections 25 (25A, 25B) are formed in advance, but at the time of crimping, the projections 25 (25A, 25B). Are formed at the same time.
  • the electric wire 10 is assumed to have an outer diameter of about 0.9 mm to 6.9 mm, for example, and the plate thickness of the crimp terminal 20 is assumed to be about 0.15 to 0.60 mm. To do.
  • the crimping tool 30 a is composed of an upper blade mold 31 and a lower blade mold 32, similarly to the crimping tool 30.
  • a convex portion 37 is formed at a position corresponding to the cover crimping portion 24 and at a position where the upper blade mold 31 and the lower blade mold 32 face each other.
  • the convex portion 37 may be formed at one location, or may be formed at a plurality of three or more locations. Good.
  • FIG. 14 is a diagram showing a state in which the electric wire 10 and the crimp terminal 20 are connected by crimping.
  • the crimp terminal 20 crimps the conductor exposed portion 11 by the conductor crimp portion 23 and crimps the insulating coating portion 12 by the coating crimp portion 24.
  • the protruding strip portions 25 ⁇ / b> A and 25 ⁇ / b> B are formed in the covering crimping portion 24 at positions corresponding to the protruding portions 37.
  • the convex portion 37 compresses the coated crimping portion 24 more strongly than the other portions, thereby forming the protruding strip portions 25 ⁇ / b> A and 25 ⁇ / b> B that protrude to the inner surface side of the coated crimped portion 24.
  • the length of the coated crimping portion 24 (the length of the insulating coating portion 12 inserted in the coated crimped portion and indicated by B in the figure) is desirably 2 mm or more, and more desirably. Is 2.5 to 5.0 mm. If the coating crimping length is too short, the insulation coating 12 may not be crimped sufficiently and watertightness may not be maintained. On the other hand, if the covering crimping length is too long, the terminal itself becomes longer than necessary.
  • FIG. 15A is a cross-sectional view of the cover crimping portion 24 at a portion corresponding to the ridge portion 25A (25B) before compression.
  • FIG.15 (b) is sectional drawing in the coating
  • the compression rate of the coated crimping part is obtained as follows. First, let A0 be the cross-sectional area of a circle formed by the outer peripheral surface of the coated crimping part 24 before compression. Moreover, let A1 be a substantially circular cross-sectional area formed by the outer peripheral surface of the cover crimping portion 24 at the tip end portion of the protruding strip portion 25A (25B) after compression. In this case, the compression rate is calculated as A1 / A0. That is, a compression rate of 100% means that the coated crimping part 24 is not compressed, and a compression rate of 50% means that the cross-sectional area calculated from the outer diameter of the coated crimped part 24 before compression is halved. This means that the cover crimping portion 24 has been compressed.
  • the insulator 15 may be broken because the compression is too strong.
  • the compression ratio exceeds 90%, the amount of compression is too small, and it becomes difficult to ensure sufficient water stopping properties.
  • FIG. 16 is a partial enlarged cross-sectional view of the coated crimping part 24 after crimping, and is an enlarged view of part A in FIG.
  • the coated crimping portion 24 is formed with the convex strip portions 25A and 25B corresponding to the convex portion 37 formed on the crimping tool 30a.
  • a part of the crimping tool 30a is shown, but in the following description, dimensions including the spring back after the crimping terminal 20 is taken out from the crimping tool 30a will be described.
  • the shape of the ridge portions 25A and 25B is the same, and the following description is applicable even when the number of ridge portions is different from the illustrated example.
  • the height of the ridges 25A and 25B (D in the figure, the height of the tips of the ridges 25A and 25B with respect to the inner surface of the maximum inner diameter of the coated crimping part 24 at a portion other than the ridges 25A and 25B)
  • the thickness of the crimp terminal 20 (the coated crimp part 24) is preferably equal to or less than the thickness (C in the figure, which is the thickness of a part that is the maximum inner diameter of the part other than the protruding strips 25A and 25B). If the height of the ridges 25A and 25B is too high, the plate thickness of the coated crimping part 24 (projection ridges 25A and 25B) becomes too thin, which is not desirable.
  • the height of the protrusions 25A and 25B is 0.5 times or more the wall thickness of the crimp terminal 20 (cover crimp part 24).
  • the height of the ridges 25A and 25B may be 0.125 mm to 0.25 mm, and particularly preferably 0.125 to 0.15 mm.
  • the width (length in the longitudinal direction) of the ridges 25A and 25B is defined as follows.
  • the tips of the ridges 25A and 25B do not necessarily have a clear convex shape, and the boundaries between the ridges 25A and 25B and other parts may become unclear.
  • variety (length of a longitudinal direction) of convex part 25A, 25B is defined by the width
  • the width of the concave portion (E in the drawing) on the outer peripheral surface side of the coated crimping portion 24 corresponding to the convex strip portions 25A and 25B is Slightly bigger. Therefore, in the present invention, the intersection of the straight line portion on the outer peripheral surface of the portion other than the concave portion and the straight line portion on the inner wall surface of the concave portion is used as the starting point of the width of the convex strip portions 25A and 25B. That is, the width of the concave portion substantially matches the width of the convex portion 37.
  • the width of the ridges 25A and 25B defined in this way is preferably 0.20 mm to 0.90 mm. If the widths of the protrusions 25A and 25B are too narrow, the width of the protrusions 37 in the crimping tool becomes small, and the protrusions 37 may be damaged. On the other hand, if the widths of the protrusions 25A and 25B are too wide, the length of the entire terminal becomes longer than necessary. At this time, the length in the longitudinal direction of the concave portion on the outer surface of the coated crimping portion is desirably 10% or more of the length of the coated crimped portion. If it does in this way, corrosion prevention in a crimping
  • the number of projections ⁇ width is 1 ⁇ 2 or less of the length of the coated crimping portion.
  • the width of the ridges be 1 ⁇ 4 or less of the length of the coated crimping part.
  • the shape of the convex portion 37 is desirably a trapezoidal shape in which the width of the tip is narrowed or an arc shape in which the width of the tip is narrowed.
  • the width of the tip portion is set to 0.2 mm to 0.90 mm with respect to the width of the base portion of the convex portion 37.
  • the thickness may be about 10 mm to 0.80 mm.
  • the pitch of the ridges 25A and 25B (G in the figure, for example, the interval between the centers of the ridges can be used. Even if it is not semicircular, the distance between the centers may be 0.5 to 2.0 mm, more preferably 0.8 to 1.4 mm. If the pitch is too narrow, the groove width (I in the figure) between the convex portions 37 of the crimping tool 30a becomes narrow, so that the manufacturability of the crimping tool 30a is poor, and the convex strip portions are too close to each other. The effect of forming a plurality of parts is reduced.
  • the pitch of the ridge portions 25A and 25B is 1.5 times or more the terminal board thickness.
  • the pitch is too wide, the length of the entire terminal becomes longer than necessary, which hinders downsizing. Furthermore, the stress of the insulation coating part pinched
  • the length (H in the drawing) of the substantially linear portion from the rear end side of the base portion of the concave portion corresponding to the ridge portion 25B to the rear end of the coated crimped portion 24 is 0. .5 mm or more is desirable. This is because if the length is too short, the rear end portion of the coated crimping portion 24 opens in a trumpet shape during crimping, which is disadvantageous for breakage and waterstop.
  • the indentation depth (J in the figure) of the cover crimping portion 24 is 75% or less at least in the circumferential direction with respect to the thickness T of the insulator 15 before crimping of the insulation coating portion 12 to be crimped. It is desirable. That is, it is desirable that J / T is 0.75 or less. If the indentation depth of the cover crimping portion 24 is too small with respect to the thickness of the insulator 15, the effects of the ridge portions 25 ⁇ / b> A and 5 ⁇ / b> B cannot be obtained sufficiently.
  • the insulator 15 may be torn if the indentation depth of the covering crimping part 24 is too large with respect to the thickness of the insulator 15. If the thickness of the insulating coating is 0.2 to 0.35 mm, the ratio of J / T is desirably 13% or more.
  • each form such as the above-mentioned protruding item
  • FIG. 17 shows an outline of the experimental method.
  • the crimp terminal 20 that crimped the electric wire 10 was put in a water tank 41 containing water, and pressurized air was sent from the end of the electric wire 10 toward the crimp terminal 20 by the regulator 42. Pressurized air was discharged at 50 kpa for 30 seconds.
  • the control sample is a wire harness using the crimp terminal 20 in which the protruding crimp part is not provided in the coated crimp part 24.
  • Sample 1 is a wire harness using a crimp terminal 20 in which the distance D1 between the two ridges 25A and 25B is eight times the thickness D2 of the insulator 15.
  • Sample 2 is a wire harness using a crimp terminal 20 having a separation dimension D1 that is six times the thickness dimension D2 of the insulator 15.
  • Sample 3 is a wire harness using a crimp terminal 20 having a separation dimension D1 that is five times the thickness dimension D2 of the insulator 15.
  • Sample 4 is a wire harness using a crimp terminal 20 in which the separation dimension D1 is four times the thickness dimension D2 of the insulator 15.
  • Sample 3 and sample 4 are wire harnesses according to this embodiment.
  • the wire harness heated at 120 degreeC for 24 hours and the wire harness which does not perform such a heating were prepared.
  • a wire harness heated at 120 ° C. for 24 hours and 120 hours and a wire harness without such heating were prepared.
  • the wire harness 1 may be used in a high-temperature environment, and particularly when used in such a high-temperature environment, the elasticity of the insulator 15 is reduced, and the crimping portion 22 and the insulating coating portion 12 are separated. There exists a tendency for the crimping force between to fall. In this experiment, it is possible to confirm the durability of the use of the wire harness 1 in a high temperature environment.
  • sample 1 in the heat treatment for 24 hours, no air leak was confirmed in seven samples, but one was confirmed to be air leak at a pressure of 30 KPa and two in 20 KPa. In the heat treatment for 120 hours, air leakage was confirmed at a pressure of 1 to 3 KPa in all cases.
  • sample 2 in the heat treatment for 24 hours, no air leak was confirmed in eight samples, but one was confirmed to be air leak at a pressure of 40 KPa and one was 50 KPa. In the 120-hour heat treatment, no air leakage was confirmed in the five samples, but air leakage was confirmed in the remaining five samples at a pressure of 5 to 30 KPa.
  • the separation dimension D1 of the ridge portion 25 is not more than five times the thickness dimension D2 of the insulator 15, In particular, it was proved that the inside of the lead wire crimping portion 23 can be kept watertight.
  • the separation dimension D1 can penetrate into the separation portions in the longitudinal direction X of the protruding strip portion 25A and the protruding strip portion 25B. It is assumed that water tightness is improved.
  • the separation dimension D1 of the protrusions 25A and 25B 5 times or less the thickness dimension D2 of the insulator 15 it is ensured that moisture enters from the rear end portion 20B to the box portion 21 side. Can be prevented. That is, the lead wire crimping part 23 can be kept watertight. Therefore, electrolytic corrosion due to contact between the conductive wire 16 and the crimp terminal 20 can be reliably prevented.
  • the radial dimensions of the two ridges 25A and 25B are approximately the same. However, they may have different dimensions.
  • the electric wire 10 can be easily inserted by making the ridge portion 25A located on the box portion 21 side larger than the ridge portion 25B located on the rear end portion 20B side. Further, by making the ridge portion 25B larger than the ridge portion 25A, the bendability of the conductor exposed portion 11 can be maintained and the crimped state to the conductor crimp portion 23 can be maintained.
  • the cross-sectional shape of the convex strip portions 25A and 25B is substantially rectangular, but is not limited to this shape.
  • the cross-sectional shape may be a polygon such as a circle or a triangle.
  • the cross-sectional shape may differ by 25 A of protruding item
  • Sample 5 has no protrusions
  • sample 6 has protrusions formed in one circumferential direction
  • sample 7 has protrusions formed in two circumferential directions.
  • the compression rate of the sample 5 is a compression rate in a site
  • the samples 6 and 7 are the compression rates in a protruding item
  • the compression ratios of portions other than the ridges are about 60% and about 80%, respectively.
  • surface shows that the leak was not confirmed even at 200 kPa.
  • the samples 9 to 18 having a compression rate of 95% to 40% were all good without heating.
  • the air leak pressure was 50 kPa or more.
  • the air leak pressure after heating was 50 kPa or more.
  • the coating thickness was 0.35 mm
  • samples 24 to 29 having an indentation amount / coating thickness of 71% or less were able to obtain good results.
  • the indentation amount was too large and the covering portion was cut. For this reason, the leak test could not be performed.
  • the coating thickness was 0.35 mm, good results could be obtained if the indentation amount / coating thickness was at least 14%.
  • the indentation amount / covering thickness is desirably 75% or less.
  • the watertightness before and after heating was evaluated by changing the shape of the ridges.
  • the pushing width of the ridge portion indicates the F dimension in FIG.
  • tip part refers to the width
  • the results are shown in Table 6.
  • the terminal plate thickness was 0.25 mm, and the push-in amount was less than the plate thickness.
  • the wire size was 2.5 sq, the inner diameter of the terminal covering crimping part was 3.0 mm, and the length of the covering crimping part was 3.0 mm.
  • Samples 59 to 70 having a ridge pitch of 0.5 to 2.0 mm can obtain sufficient water-tightness, and in particular, Sample 62 having a ridge pitch of 1.0 to 1.5 mm. From ⁇ 65, even better results could be obtained.
  • the inner diameter of the coated crimping part used in the above experiment is representative.
  • the inner diameter is about 2.2 mm to 3.0 mm
  • the conductor cross-sectional area is about 0.72 mm 2 to 1.37 mm 2
  • the inner diameter is about It may be about 1.5 mm to 2.0 mm.
  • the present invention is not limited thereto.
  • a wire conductor made of a noble metal such as copper or a copper alloy and the crimping portion 5 may be crimped and connected. Even in this case, substantially the same operations and effects as the above embodiment can be achieved.
  • compression-bonding part 22 of the above-mentioned structure can prevent permeation of water in a crimping
  • a step may be formed by changing the inner diameters (outer diameters) of the conductor crimping part 23 and the covering crimping part 24 of the crimping part 22.
  • a plurality of wire harnesses according to the present invention can be bundled and used.
  • a structure in which a plurality of wire harnesses are bundled in this way is referred to as a wire harness structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Insulated Conductors (AREA)
  • Processing Of Terminals (AREA)

Abstract

La présente invention se rapporte à un faisceau de conducteurs (1) qui contient un fil électrique (10) et un contact à sertir (20). Le fil électrique (10) comprend une partie isolée (12) dans laquelle le fil est enrobé avec un isolant, et une partie de fil exposée (11) dans laquelle une partie du fil est exposée depuis le bout de la partie isolée (12). Le contact à sertir (20) comprend une partie boîtier (21) positionnée au niveau de l'extrémité avant (20A), et une partie à sertir (22) dans laquelle le fil électrique (10) peut être inséré, et qui est positionnée au niveau de l'extrémité arrière (20B). La partie à sertir (22) s'ouvre vers l'extrémité arrière (20B) et comprend une partie à sertir de revêtement (24) qui est sertie sur la partie isolée (12), et une partie de sertissage de fil (23) qui est sertie sur la partie de fil exposée (11). Une nervure faisant saillie (25), qui fait saillie vers l'intérieur dans une direction radiale, est formée sur la partie à sertir de revêtement (24).
PCT/JP2014/054234 2013-02-21 2014-02-21 Faisceau de conducteurs, procédé permettant de raccorder un contact et un câble enrobé, et structure de faisceau de conducteurs WO2014129600A1 (fr)

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Cited By (2)

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EP3125369A4 (fr) * 2014-03-24 2017-10-25 Furukawa Electric Co. Ltd. Faisceau de fils, procédé de connexion entre un fil conducteur revêtu et une borne, et corps de structure de faisceau de fils
US20220158364A1 (en) * 2020-11-19 2022-05-19 Yazaki Corporation Electric wire with terminal and terminal crimping device

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JP2017084558A (ja) * 2015-10-27 2017-05-18 古河電気工業株式会社 圧着端子及び端子付き電線
JP2018092739A (ja) * 2016-11-30 2018-06-14 古河電気工業株式会社 端子付き電線、端子、端子付き電線の製造方法、ワイヤハーネス

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WO2014014103A1 (fr) * 2012-07-20 2014-01-23 古河電気工業株式会社 Structure raccordée, raccord, et procédé de fabrication de structure raccordée

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JP2002216862A (ja) * 2001-01-19 2002-08-02 Yazaki Corp 端子と電線の接続部の防水構造及び防水方法
JP2006331931A (ja) * 2005-05-27 2006-12-07 Mitsubishi Cable Ind Ltd 電線の接続構造及びその接続方法
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EP3125369A4 (fr) * 2014-03-24 2017-10-25 Furukawa Electric Co. Ltd. Faisceau de fils, procédé de connexion entre un fil conducteur revêtu et une borne, et corps de structure de faisceau de fils
US10305240B2 (en) 2014-03-24 2019-05-28 Furukawa Electric Co., Ltd. Wire harness, connection method between covered conducting wire and terminal, and wire harness structure body
US20220158364A1 (en) * 2020-11-19 2022-05-19 Yazaki Corporation Electric wire with terminal and terminal crimping device
US11677167B2 (en) * 2020-11-19 2023-06-13 Yazaki Corporation Electric wire with terminal and terminal crimping device

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