JP2011228198A - Cable and stacked cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable and a stacked cable with improved heat dissipation.SOLUTION: In a flat cable 1, a surrounding part of a plurality of conductors 2 arranged in parallel at a predetermined spacing is covered with covering member 3 composed of insulating resin and thicker than the conductors 2 and protrusions 5 is formed on the circumference surface of the covering member 3. By providing the protrusions 5 for the flat cable 1, the surface area of the circumference surface of the covering member 3 increases to improve heat dissipation. A stacked cable 10 formed by stacking the flat cables 1 has excellent heat dissipation.

Description

  The present invention relates to a cable and a laminated cable.

  In order to connect the devices, a cable in which a conductor is covered with a covering member is used. For such a cable, a round cable having a circular cross-sectional shape has been used. However, since the resistance value of the cable increases due to heat generated during energization, the allowable current value decreases. . In order to solve this problem, a flat cable in which conductors are divided into a plurality of wires and arranged in parallel at a predetermined interval and the periphery is covered with a covering member may be used. Since the total surface area of the conductor in contact with the covering member is larger in the flat cable, the heat dissipation performance is higher than in the round cable, and the temperature rise can be suppressed.

  Such flat cables must be stacked and arranged depending on the space of the installation location. However, when flat cables are laminated, the heat dissipation surface of the covering member is blocked, so that heat is accumulated and the temperature of the cable rises during energization.

  In order to solve such a problem, Patent Document 1 discloses that a plurality of conductors that are covered by a predetermined number and covered with a covering member are arranged at a certain interval in the width direction, and this interval is further increased. There has been disclosed a flat cable having a structure in which a thin member having a predetermined length in the width direction is installed in the provided portion, which is thinner than the thickness of the conductor.

JP-A-01-105406

  However, for example, a cable used to connect between devices mounted on a hybrid vehicle or an electric vehicle, for example, between an inverter device and a motor, a large current flows and the original ambient temperature of an engine room or the like. Because it is installed in a high environment, heat tends to accumulate in the cable, and the temperature tends to rise. Therefore, cables used in the above-described environment are required to have higher heat dissipation performance.

  In addition, when flat cables are stacked, in order to prevent displacement of each flat cable, flat cables must be bundled using a bundling member, which causes problems in terms of work efficiency and cost. there were.

  This invention is made | formed in view of said problem, and makes it the 1st objective to provide the cable and laminated | stacked cable which can improve heat dissipation more. Further, the second object is to suppress the positional deviation of the cable at the time of stacking while achieving the first object.

  In order to solve the above-mentioned problem, the invention of claim 1 is characterized in that a plurality of conductors arranged in parallel at a predetermined interval are covered with a coating that is thicker than the plurality of conductors. The cable is covered with a member, and a protrusion is formed on the outer peripheral surface of the covering member.

  A second aspect of the present invention is the cable according to the first aspect, wherein a plurality of protrusions are formed on each of an upper surface and a lower surface of the outer peripheral surface, and the plurality of protrusions are spaced from each other. Thus, it is characterized by extending along one direction.

  The invention of claim 3 is a laminated cable in which a plurality of the cables according to claim 2 are laminated, and in each of the plurality of cables, the plurality of protrusions extend along the longitudinal direction of the conductor. The two cables stacked on each other are characterized in that the protrusions of the other cable are arranged between the adjacent protrusions of one of the cables.

  A fourth aspect of the present invention is the laminated cable according to the third aspect, wherein each of the plurality of protrusions has a rounded tip.

  The invention according to claim 5 is the laminated cable according to claim 3 or claim 4, wherein in each of the plurality of cables, the width of the protrusion in the width direction of the cable is the adjacent protrusion. It is characterized by being smaller than the interval between them.

  A sixth aspect of the present invention is the laminated cable according to any one of the third to fifth aspects, wherein a braided wire is disposed between the plurality of cables constituting the laminated cable.

  A seventh aspect of the present invention is the laminated cable according to the sixth aspect, wherein a braided wire covers an outer periphery of the laminated cable.

  According to the first aspect of the present invention, since the protrusion is provided on the outer peripheral surface of the cable, the heat radiation area can be increased and the temperature rise can be suppressed.

  Since the invention according to claim 2 is provided with a plurality of protrusions extending along one direction so that a gap is formed between each of the upper surface and the lower surface of the outer peripheral surface of the flat cable, The heat dissipation area is further increased, and the temperature rise can be further suppressed.

  According to the third aspect of the present invention, since the laminated cable is configured by using the cable having a plurality of protrusions formed on the outer peripheral surface, the heat radiation area can be increased and the temperature rise can be suppressed. Furthermore, since the protrusions of the other cable are arranged between the protrusions of one cable, it is possible to suppress the positional deviation between the cables in the arrangement direction of the plurality of protrusions.

  In the invention according to claim 4, since the tip of the protrusion is rounded, it is possible to suppress heat buildup between the cables and further improve the heat dissipation.

  In the invention according to claim 5, since the width of the protrusion is smaller than the arrangement interval between the protrusions, a gap is formed between the adjacent protrusions when the cables are laminated. For this reason, heat dissipation between cables can be suppressed and heat dissipation can be further improved.

  In the invention according to claim 6, since the braided wire is arranged between the plurality of cables constituting the laminated cable, a gap is generated between the cables, and heat radiation between the cables is suppressed and heat radiation is performed. Can be improved. In addition, in two cables that are laminated to each other among a plurality of cables constituting a laminated cable, the braided wire between them is pressed against the other cable by the protruding portion of one cable. The positional deviation between the wire and the cable can be suppressed, and the positional deviation between the cables can also be suppressed.

  In the invention according to claim 7, since the outer periphery of the laminated cable is also covered with the braided wire, the heat generated between the cables is propagated to the braided wire between the cables and the braided wire on the outer periphery. Since heat is efficiently dissipated, heat dissipation can be improved. Further, by covering the outer periphery of the laminated cable with the braided wire, in the two cables laminated together, the protruding portion of one cable presses the braided wire between them more against the other cable. Therefore, the positional deviation between the braided wire and the cable can be suppressed, and the positional deviation between the cables can be further suppressed.

It is a perspective view of the cable which concerns on embodiment of this invention. It is a top view of the cable with a terminal using the cable which concerns on embodiment of this invention. It is sectional drawing in the width direction of the cable which concerns on embodiment of this invention. It is sectional drawing in the width direction of the laminated cable which concerns on embodiment of this invention. It is sectional drawing in the width direction by which the braided wire was arrange | positioned between the laminated cables which concern on embodiment of this invention. It is sectional drawing in the width direction of the cable by which the braided wire is arrange | positioned between the laminated cables which concern on embodiment of this invention, and the circumference | surroundings were covered with the braided wire.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of a flat cable 1 according to an embodiment of the present invention. In FIG. 1, a flat cable 1 has a structure in which a plurality of conductors 2 (seven in FIG. 1) arranged at a predetermined interval are covered with a covering member 3. The conductor 2 is composed of a stranded wire in which a plurality of conducting wires are converged, and copper or the like is generally used as a material. As the insulating resin used for the covering member 3, for example, polyvinyl chloride, polyethylene, olefin resin, or the like is used. In the flat cable 1, the thickness of the covering member 3 is larger than the thickness of the conductor 2 in any part.

  FIG. 2 is a top view of the end of the cable 9 with a terminal in which the terminal 8 is connected to both ends of the flat cable 1. The terminal 8 is made of a metal plate material, and includes an open barrel-shaped wire crimping portion 81 and a device connection portion 82 having a bolt hole 820. One terminal 8 is connected to the end of the flat cable 1. That is, the terminals 8 are connected to the flat cable 1 by crimping the ends of all the conductors 2 in the flat cable 1 at the wire crimping portion 81 of one terminal 8 and crimping. Such a terminal-attached cable 9 is such that the device connecting portion 82 is fixed by bolting with a connection terminal provided in a device such as an inverter device or a motor mounted in a hybrid vehicle or an electric vehicle, for example. Is connected to be conductive.

  FIG. 3 is a cross-sectional view of the flat cable 1 in the width direction. As described above, a plurality of protrusions 5 are formed at predetermined intervals along the width direction of the flat cable 1 on the upper surface and the lower surface of the outer peripheral surface of the covering member 3 of the flat cable 1 (6 on the upper surface in FIG. 3). Book, 6 on the bottom). Since the protrusion 5 is formed by providing a depression corresponding to the protrusion 5 in the extrusion mold when forming the covering member 3 around the plurality of conductors 2, the protrusion 5 extends along the longitudinal direction of the flat cable 1. It is a uniform shape and is made of the same material as the insulating resin constituting the covering member 3. Each protrusion 5 has a predetermined height equally, and its tip 51 is rounded. Moreover, the arrangement | positioning space | interval of each protrusion 5 is larger than the width length of protrusion 5 itself. The protrusion 5 on the upper surface of the flat cable 1 is positioned above the two adjacent conductors 2, and the protrusion 5 on the lower surface of the flat cable 1 is positioned below the two adjacent conductors 2. To do.

  Thus, since the several protrusion 5 is formed in the upper surface and lower surface of the outer peripheral surface of the flat cable 1, the surface area of the outer peripheral surface of the coating | coated member 3 will increase. That is, since the heat dissipation area in the flat cable 1 is increased, the heat dissipation can be improved.

  When such a flat cable 1 is connected to, for example, a three-phase motor that requires three-phase AC, one flat cable 1 is required for each phase. That is, in the case of three phases, three flat cables 1 are required. Since these three flat cables 1 cannot be arranged in parallel depending on the situation of the arrangement space, they must be laminated. FIG. 4 is a cross-sectional view in the width direction when three flat cables 1 are laminated (hereinafter, the whole laminated flat cable 1 is referred to as a laminated cable 10).

  As shown in FIG. 4, when attention is paid between two flat cables 1 stacked on each other among the plurality of flat cables 1 constituting the laminated cable 10, the other of the flat cables 1 is projected between the other protrusions 5. The protrusion 5 of the flat cable 1 is arranged. That is, the outer peripheral surface of the one flat cable 1 (hereinafter referred to as the outer peripheral flat portion 31) between the arbitrary protrusion 5 formed on the one flat cable 1 and the protrusion 5 adjacent to the arbitrary protrusion 5. The tip 51 of the projection 5 of the other flat cable 1 is in contact with the other flat cable 1. Since the tip 51 of the protrusion 5 is rounded, the contact area between the protrusion 5 of one flat cable 1 and the outer peripheral flat portion 31 of the other flat cable 1 in contact with the protrusion 5 is reduced. That is, at the time of lamination, since the protrusion 5 contacts the outer peripheral flat portion 31 of the covering member 3 only at the most distal end portion of the tip portion 51, the roundness of the tip portion 51 excluding the contact portion with the outer peripheral flat portion 31. A gap is generated between the portion and the outer peripheral flat portion 31. Furthermore, since the width of the protrusion 5 itself is smaller than the interval between the protrusions 5, in other words, the length in the width direction of the outer peripheral flat portion 31, a gap is also formed between the adjacent protrusions 5 in the laminated cable 10. Will be.

  Thus, in the laminated cable 10, each protrusion 5 is not completely disposed in close contact with the protrusion 5 adjacent to the protrusion 5 and the outer peripheral flat portion 31 in contact with the protrusion 5. Since gaps are formed, these gaps serve as air flow paths, and it is possible to suppress the heat buildup that occurs between the flat cables 1 stacked on each other. Moreover, since the several protrusion 5 is formed in each flat cable 1 which comprises the laminated cable 10, the surface area of the outer peripheral surface of the coating | coated member 3 will increase, and heat dissipation can be improved. Thereby, the temperature rise of the laminated cable 10 can be suppressed.

  Further, even if a force that causes a displacement in the width direction of the laminated cable 10 occurs, the adjacent protrusions 5 of the laminated cable 10 come into contact with each other, so that the displacement in the width direction can be suppressed. That is, when two flat cables 1 that are stacked on each other out of a plurality of flat cables 1 constituting the laminated cable 10 are shifted in the width direction, one of the adjacent flat cables is adjacent to the other flat cable 1. It contacts the side surface of one protrusion 5. For this reason, it is possible to suppress further displacement in the width direction. Therefore, it is possible to reduce the number of bundling members that have been used in the past to prevent the positional deviation of the laminated cable 10 or to use a simple bundling member. Therefore, the cost required for the binding member can be reduced. Alternatively, the work efficiency of the bundling work is improved.

  FIG. 5 is a cross-sectional view in the width direction of the laminated cable 11 in which the braided wire 7 a is arranged between the flat cables 1 constituting the laminated cable 10. The braided wire 7a is a structure in which a metal bundle obtained by gathering fine metal wires such as copper wires and gathering them into a bundle is further knitted, and has flexibility. Such a braided wire 7a is formed into a cylindrical shape, and the flat cable 1 is inserted into the braided wire 7a. Then, the flat cable 1 wrapped in the braided wire 7 a is sandwiched from above and below by the two flat cables 1 to form the laminated cable 11. In this way, the braided wire 7 a is arranged between the flat cables 1 of the laminated cable 11. When attention is paid to two flat cables 1 stacked on each other among the flat cables 1 constituting the laminated cable 11, an arbitrary protrusion 5 formed on one flat cable 1 and the arbitrary protrusion 5 are provided. The protrusion 5 of the other flat cable 1 is arranged between the adjacent protrusions 5. At this time, the protruding portion 5 of one flat cable 1 is configured to press the braided wire 7 a existing between the flat cables 1 toward the outer peripheral flat portion 31 of the other flat cable 1 in the entire tip portion 51. For this reason, the braided wire 7 a having flexibility is deformed in accordance with the shape of the protrusion 5 and fills the gap between the flat cables 1. Thus, since the braided wire 7a is interposed between the flat cables 1 constituting the laminated cable 11, the flat cables 1 laminated with each other are not in contact with each other, and are laminated in a state separated by a predetermined distance. Is done. Therefore, the heat generated in each flat cable 1 constituting the laminated cable 11 is transmitted to the braided wire 7a from the outer peripheral surface of the covering member 3 without being overheated, and then is radiated into the air. Since each flat cable 1 constituting the laminated cable 11 has a plurality of protrusions 5, the surface area of the outer peripheral surface of the covering member 3 is increased, and heat dissipation can be improved. In addition, since the thermal conductivity of the solid is larger than that of the gas, it is more flat when the braided wire 7a is arranged and the flat cable 1 and the braided wire 7a are brought into contact than when no flat cable 1 is arranged. Heat generated between the cables 1 tends to be transmitted to the outside. That is, by disposing the braided wire 7 a between the flat cables 1, the heat dissipation can be further improved.

  Moreover, the front-end | tip part 51 of the protrusion 5 is round, and the width length of protrusion 5 itself is smaller than the arrangement | positioning space | interval between the protrusions 5 in the flat cable 1, ie, the length in the width direction of the outer periphery flat part 31. . For this reason, since the tip 51 has a roundness, a gap generated between the tip 51 and the outer peripheral flat portion 31 is increased, and a gap is also formed between the adjacent protrusions 5. Become. Therefore, since the braided wire 7a can be arranged in these gaps, more braided wires 7a can be arranged between the flat cables 1 and heat dissipation can be further improved.

  Moreover, it is the two flat cables 1 mutually laminated | stacked among the several flat cables 1 which comprise the laminated cable 11, Comprising: The front-end | tip part 51 of the protrusion 5 of one flat cable 1 is the other flat cable. Since the braided wire 7a is pressed against the outer peripheral flat portion 31, the adhesion between the braided wire 7a and the covering member 3 is improved. For this reason, since the variation of the temperature of the laminated cable 11 is suppressed, or the electrostatic capacitance of the laminated cable 11 is improved and stabilized, generation of a surge voltage can be suppressed.

  Further, since the braided wire 7a is pressed by the protrusion 5, it is difficult for the positional deviation to occur, so that the positional relationship between the braided wire 7a and the covering member 3 is maintained. At the same time, when a force for shifting the position in the width direction is generated, the protrusions 5 of the laminated cable 11 come into contact with the adjacent protrusions 5, so that the displacement in the width direction of each flat cable 1 is also suppressed. It is done. Therefore, it is possible to reduce the number of binding members used for the laminated cable 11 and to use a simple binding member. Therefore, the efficiency of bundling work can be improved. Alternatively, the cost required for the binding member can be reduced.

  FIG. 6 is a cross-sectional view in the width direction of the laminated cable 12 in which the entire laminated cable 11 is further covered with the braided wire 7b. By inserting the laminated cable 11 into the tubular braided wire 7b, the braided wire 7a is arranged between the flat cables 1 constituting the laminated cable 12, and the outer peripheral surface is the braided wire 7b. It becomes a structure covered with. Thus, since the outer peripheral surface of the laminated cable 12 is covered with the braided wire 7b, the heat generated between the flat cables 1 stacked on each other is transferred from the outer peripheral surface of each covering member 3 to the inner braided wire 7a. Furthermore, it propagates to the outer braided wire 7b and is dissipated from the braided wire 7b into the air. Since the braided wire 7 b covers the entire outer periphery of the laminated cable 12, the heat dissipating area radiated into the air is increased, and the heat dissipation can be improved as compared with the laminated cable 11.

  Moreover, since the whole outer peripheral surface is covered with the braided wire 7b, it is possible to further suppress the displacement of the flat cable 1 in the width direction. Therefore, it is possible to reduce the number of bundling members used in the laminated cable 11 and to use a simple bundling member, and the efficiency of bundling work can be improved. Alternatively, the cost required for the binding member can be reduced. Moreover, the adhesiveness of the braided wire 7a and the covering member 3 is further improved by covering the outer periphery with the braided wire 7b. For this reason, since the variation in the temperature of the laminated cable 12 is further reduced, or the capacitance of the laminated cable 12 is further improved and stabilized, the generation of a surge voltage can be suppressed.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above embodiment, three flat cables 1 are laminated on the assumption of a three-phase alternating current, but the present invention is not limited to such a form. For example, in the case of two-phase alternating current, a laminated cable can be realized by laminating using two flat cables 1. The number of cables constituting the laminated cable may be any number as long as there is no problem in terms of the space to be arranged.

  In addition, the present invention may be in a mode other than the above-described embodiment with respect to the number, size, shape, and position of the protruding member 5 installed on the flat cable 1. For example, a plurality of protrusions 5 may be formed along the longitudinal direction of the conductor 2, and the direction in which the protrusions 5 extend is not limited. Further, the protrusion 5 may not have a uniform shape along the longitudinal direction of the conductor 2.

  Moreover, in the said embodiment, although the conductor was comprised with the strand wire of the several conducting wire, it is not restricted to such a form, You may be a single wire.

  Moreover, in the said embodiment, although the protrusion 5 was provided in the circumference | surroundings of the flat flat cable 1, if the cable which concerns on this invention is a cable which has the several conductor 2, the shape is flat. There is no need.

  Further, the arrangement and covering method of the braided wires 7a and 7b are not limited to those described in the above embodiment. The flat cable 1 may have a configuration in which the outer periphery of the flat cable 1 is covered with a braided wire. The braided wires may be arranged and covered in any manner as long as the braided wires are arranged between the flat cables 1 or the outer periphery of the laminated cable is covered with the braided wires.

  The braided wires 7a and 7b can also serve as shield wires. When also serving as a shield wire, the braided wires 7a and 7b are used by being connected to a ground wire.

DESCRIPTION OF SYMBOLS 1 Flat cable 2 Conductor 3 Coating | coated member 5 Protrusion part 7a, 7b Braided wire 10, 11, 12 Laminated cable 31 Outer periphery flat part 51 Tip part

Claims (7)

A cable in which the periphery of a plurality of conductors arranged in parallel with a predetermined interval is covered with a covering member made of an insulator and thicker than the plurality of conductors,
A cable characterized in that a protrusion is formed on the outer peripheral surface of the covering member. The cable according to claim 1,
A plurality of protrusions are formed on each of the upper surface and the lower surface of the outer peripheral surface,
The plurality of protrusions extend along one direction so as to have a gap therebetween. A laminated cable in which a plurality of cables according to claim 2 are laminated,
In each of the plurality of cables, the plurality of protrusions extend along the longitudinal direction of the conductor,
In the two cables stacked on each other, the protruding portion of the other cable is arranged between the adjacent protruding portions of one of the cables. The laminated cable according to claim 3,
Each of the plurality of protrusions has a rounded tip. The laminated cable according to claim 3 or 4, wherein
In each of the plurality of cables, the width of the protrusion in the width direction of the cable is smaller than the arrangement interval between the adjacent protrusions. A laminated cable according to any one of claims 3 to 5,
A laminated cable, wherein a braided wire is disposed between the plurality of cables constituting the laminated cable. The laminated cable according to claim 6,
A laminated cable, wherein a braided wire covers an outer periphery of the laminated cable.

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