Wiring parts

Abstract

To provide a wiring component in which a conductive wire made of a single wire is held by a holding member made of resin, and which can suppress the conductive wire from moving relative to the holding member along its longitudinal direction. [Solution] The wiring component 1 includes first to third conductive wires 21-23 each made of a solid wire, and a holding member 3 made of resin that covers a portion of the first to third conductive wires 21-23 in the longitudinal direction to hold the first to third conductive wires 21-23. The first to third conductive wires 21-23 have at least one recess 210, 220, 230 in the portion covered by the holding member 3, and engagement with the portion of the holding member 3 introduced into the recess 210, 220, 230 suppresses relative movement of the first to third conductive wires 21-23 with respect to the holding member 3 in the longitudinal direction.

Description

[Technical field]

[0001] The present invention relates to a wiring component in which a conductive wire made of a solid wire is held by a holding member made of resin. [Background technology]

[0002] 2. Description of the Related Art Conventionally, for example, in order to connect an end of a winding of a motor to a terminal block, a wiring component in which a plurality of conductive wires are held by a holding member may be used.

[0003] Patent Document 1 describes a fixing member attached to the middle of three power lines. This fixing member fixes the power lines to each other and restricts the movement of the motor's stator in the circumferential direction, and has a rod shape curved along the circumferential direction of the stator. The fixing member has three through holes through which the power lines pass. Before being welded to the coil terminals of the stator, the power lines are inserted into the through holes and attached to the fixing member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2011-259654 A (see

[0038] -

[0043] , Figs. 3 and 4) Summary of the Invention [Problem to be solved by the invention]

[0005] In the device described in Patent Document 1, there is a risk that the power line may move relative to the fixed member along its longitudinal direction.

[0006] Therefore, an object of the present invention is to provide a wiring component in which a conductive wire is held by a holding member, and which is capable of preventing the conductive wire from moving relative to the holding member along its longitudinal direction. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the present invention provides a wiring component comprising a conductive wire made of a single wire, and a retaining member made of resin that covers a longitudinal portion of the conductive wire to retain the conductive wire, wherein the conductive wire has at least one recess in the portion covered by the retaining member, and longitudinal movement of the conductive wire relative to the retaining member is suppressed by engagement with a portion of the retaining member introduced into the recess. Effect of the Invention

[0008] According to the present invention, in a wiring component in which conductive wires are held by a holding member, it is possible to prevent the conductive wires from moving relative to the holding member along their longitudinal direction. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view showing a wiring component according to a first embodiment of the present invention together with a three-phase motor; FIG. [Diagram 2] FIG. 2A is a plan view showing the wiring components and the three-phase motor, and FIG. 2B is a side view showing the wiring components and the three-phase motor. [Diagram 3] FIG. [Figure 4] 11 is an explanatory diagram showing a portion of the first to third conductor wires covered with a holding member. FIG. [Diagram 5] 1A is an enlarged view showing the periphery of the recess of the first conductor wire before it is covered with a holding member, and FIG. 1B is an enlarged view showing the periphery of the recess of the first conductor wire covered with a holding member. [Figure 6] 13A shows a wiring component according to a second embodiment of the present invention, where (a) is an enlarged view showing the surrounding area of ​​two recesses of a first conductor wire before it is covered with a retaining member, and (b) is an enlarged view showing the surrounding area of ​​two recesses of the first conductor wire covered with a retaining member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] [First embodiment] Fig. 1 is a perspective view showing a wiring component 1 according to a first embodiment of the present invention, together with a three-phase motor 10 to which current is supplied by the wiring component 1. Fig. 2(a) is a plan view showing the wiring component 1 and the three-phase motor 10, and Fig. 2(b) is a side view showing the wiring component 1 and the three-phase motor 10. Fig. 2(b) shows the internal structure of the three-phase motor 10 with a portion of the motor 10 cut away.

[0011] The three-phase motor 10 is mounted on a vehicle as, for example, a drive source for driving the vehicle, and receives a three-phase AC current from an inverter (not shown) via a terminal block 5 and wiring components 1.

[0012] The three-phase motor 10 has a cylindrical motor case 11 with a bottom, a stator 12 housed in the motor case 11, a rotor 13 arranged inside the stator 12, a shaft 14 that passes through the center of the rotor 13 and is supported so as to be rotatable integrally with the rotor 13, and a cover member 15 made of molded resin that covers the opening of the motor case 11.

[0013] The stator 12 has U-phase, V-phase, and W-phase windings 121-123 wound around an annular stator core 120 surrounding the rotor 13. More specifically, any of the U-phase, V-phase, and W-phase windings 121-123 is wound around each of a plurality of teeth provided on the stator core 120. The stator core 120 is made of a magnetic material such as steel. The windings 121-123 are rectangular insulated electric wires in which an insulating coating layer made of enamel is formed on the outer circumferential surface of a conductor made of copper. The windings 121-123 are partly exposed from the cover member 15 to the outside of the motor case 11 and are molded into the cover member 15.

[0014] The rotor 13 has a cylindrical rotor core 131 with a through hole for inserting the shaft 14 therethrough, and a magnet 132 arranged on the outer periphery of the rotor core 131. The magnet 132 is provided with a plurality of magnetic poles such that S poles and N poles are positioned alternately. The shaft 14 is supported by a bearing (not shown) so as to be rotatable relative to the motor case 11 about the rotation axis O.

[0015] 3 is a perspective view showing the wiring component 1. The wiring component 1 includes first to third conductor wires 21-23 provided corresponding to the U phase, V phase, and W phase, respectively, a holding member 3 made of resin for holding the first to third conductor wires 21-23, and first to third connection terminals 41-43 connected to a terminal block 5.

[0016] One end of the first conductor wire 21 is connected to the U-phase winding 121, and the other end is connected to the terminal block 5. One end of the second conductor wire 22 is connected to the V-phase winding 122, and the other end is connected to the terminal block 5. One end of the third conductor wire 23 is connected to the W-phase winding 123, and the other end is connected to the terminal block 5. In the present embodiment, the other ends of the first to third conductor wires 21 to 23 are connected to the terminal block 5 via the first to third connection terminals 41 to 43, but the present invention is not limited to this. For example, the ends of the first to third conductor wires 21 to 23 on the terminal block 5 side may be bent into an arc or ring shape and directly connected to the terminal block 5.

[0017] The terminal block 5 has a plurality of (three) washers (not shown), and the first to third connection terminals 41-43 are fixed to the washers by bolts 51-53 (see Figs. 1 and 2), respectively. The terminal block 5 is fixed to the vehicle body by a fixing member (not shown), and the washers are electrically connected to the output terminals of the inverter by a wire harness.

[0018] The first to third conductor wires 21 to 23 are made of rigid solid wires and have a circular cross section perpendicular to the longitudinal direction. The first to third conductor wires 21 to 23 are made of a metal conductor made of copper, for example, coated with an insulator such as enamel, and the insulator is removed at both ends to expose the metal conductor.

[0019] The first to third conductor wires 21-23 are connected to the windings 121-123 by welding. One end of each of the first to third conductor wires 21-23, which is welded to the ends 121a, 122a, 123a of the windings 121-123 exposed from the cover member 15, is crushed from a circular cross-sectional shape to a rectangular cross-sectional shape, facilitating connection with the windings 121-123. The other ends of the core wires of the first to third conductor wires 21-23 are crimped to the first to third connection terminals 41-43, respectively. The first to third conductor wires 21-23 are bent at multiple points between both ends. The bent state is maintained by the rigidity of the first to third conductor wires 21-23.

[0020] Holding the first to third conductor wires 21-23 in the holding member 3 facilitates the connection of the first to third conductor wires 21-23 to the windings 121-123 and the fixing of the first to third connection terminals 41-43 to the terminal block 5. In addition, the first to third conductor wires 21-23 are prevented from resonating due to vibrations generated during rotation of the three-phase motor 10, for example. This resonance suppression effect is most noticeable in the first conductor wire 21, which is the longest of the first to third conductor wires 21-23.

[0021] The holding member 3 is molded and covers a part of the longitudinal direction of the first to third conductor wires 21-23. In this molding, a part of the linear parts of the first to third conductor wires 21-23 is placed inside a metal mold for resin molding, and molten resin is injected into the metal mold and solidified. In this way, the holding member 3 is formed, and the first to third conductor wires 21-23 are held by the holding member 3. In this embodiment, the holding member 3 is rod-shaped curved along the circumferential direction of the stator 12, and has a rectangular shape in a cross section perpendicular to the circumferential direction. The holding member 3 is made of a resin such as PPS (polyphenylene sulfide), PA (polyamide), or PBT (polybutylene terephthalate).

[0022] Fig. 4 is an explanatory diagram showing the portions of the first to third conductor wires 21 to 23 covered with the holding member 3. In Fig. 4, the holding member 3 is indicated by a virtual line (two-dot chain line).

[0023] The first to third conductor wires 21-23 each have one recess 210, 220, 230 in a portion covered by the holding member 3. These recesses 210, 220, 230 are formed in part of the portions of the first to third conductor wires 21-23 covered by the holding member 3, and the recesses 210, 220, 230 are not exposed to the outside of the holding member 3. The portions of the first to third conductor wires 21-23 covered by the holding member 3 are linear and parallel to each other.

[0024] Fig. 5(a) is an enlarged view showing the periphery of the recess 210 of the first conductor wire 21 before it is covered with the holding member 3. Fig. 5(b) is an enlarged view showing the periphery of the recess 210 of the first conductor wire 21 covered with the holding member 3. The recesses 220, 230 of the second and third conductor wires 22, 23 are also formed in the same manner as the recess 210 of the first conductor wire 21.

[0025] The recess 210 has a planar bottom surface 210a extending along the longitudinal direction of the first conductor wire 21, and a pair of side surfaces 210b, 210c facing each other in the longitudinal direction of the first conductor wire 21 with the bottom surface 210a in between, and R portions 210d, 210e are formed between the bottom surface 210a and the pair of side surfaces 210b, 210c, respectively. As shown in Fig. 5(a), when the recess 210 is viewed from a direction perpendicular to the longitudinal direction of the first conductor wire 21 and parallel to the bottom surface 210a, the R portions 210d, 210e are arc-shaped, and the recess 210 is formed in a bathtub shape as a whole.

[0026] In this embodiment, the bottom surface 210a and the pair of side surfaces 210b, 210c form an obtuse angle, and the interval between the pair of side surfaces 210b, 210c becomes wider as it moves away from the bottom surface 210a along the radial direction of the first conductor wire 21. The recess 210 is formed, for example, by pressing a tool having a protrusion shaped corresponding to the recess 210 against the outer circumferential surface 21a of the first conductor wire 21 to plastically deform the first conductor wire 21. In addition, the recess 210 may be formed by cutting a part of the first conductor wire 21. By forming the recess 210 in this manner, a part of the first conductor wire 21 does not protrude in a burr-like manner from the outer circumferential surface 21a of the first conductor wire 21 in the part where the recess 210 is not formed, and it is possible to suppress the burr-like protrusion from being separated from the first conductor wire 21 and remaining in the holding member 3 during molding.

[0027] When the holding member 3 is molded, a portion of the molten resin is introduced into the recess 210, which serves as the locking portion 31 that prevents the first conductor wire 21 from coming loose. In other words, the first conductor wire 21 engages with the locking portion 31, which is a part of the holding member 3 introduced into the recess 210, thereby restricting the relative movement of the first conductor wire 21 in the longitudinal direction with respect to the holding member 3.

[0028] As shown in Fig. 5(a), the depth d of the recess 210 in the radial direction of the first conductor wire 21 is preferably 5% or more and less than 50% of the diameter D of the first conductor wire 21. If the depth d of the recess 210 is less than 5% of the diameter D of the first conductor wire 21, the effect of preventing the first conductor wire 21 from coming off is reduced, and if the depth d of the recess 210 is 50% or more of the diameter D of the first conductor wire 21, the cross-sectional area of ​​the portion where the recess 210 is formed becomes too small, so that the current flowing through the first conductor wire 21 is likely to concentrate in that portion and generate heat. In addition, by making the depth d of the recess 210 less than 50% of the diameter D of the first conductor wire 21, the risk of the first conductor wire 21 breaking in the recess 210 due to the resin pressure when the holding member 3 is molded can be suppressed.

[0029] It is desirable that the length L of the recess 210 in the longitudinal direction of the first conductor wire 21 is 5% or more of the diameter D of the first conductor wire 21. If the length L of the recess 210 is less than 5% of the diameter D of the first conductor wire 21, the effect of preventing the first conductor wire 21 from coming off is reduced. It is also desirable that the length L of the recess 210 is 0.5 mm or more. If the length L of the recess 210 is less than 0.5 mm, there is a risk that the molten resin will not be sufficiently introduced into the recess 210 during molding.

[0030] In the present embodiment, the length L0 of the bottom surface 210a of the recess 210 (the length in the longitudinal direction of the first conductor wire 21) is also 5% or more of the diameter D of the first conductor wire 21 and is 0.5 mm or more. In the present embodiment, the length L of the recess 210 is longer than the diameter D of the first conductor wire 21.

[0031] There is no particular upper limit to the length L of the recess 210 as long as it is less than the width W (see FIG. 5(b)) of the holding member 3 along the longitudinal direction of the first conductor wire 21, but even when the width of the holding member 3 is large, it is desirable that the upper limit be, for example, less than five times (500%) the diameter D of the first conductor wire 21. This is because if the length L of the recess 210 is too long, the range where the cross-sectional area of ​​the first conductor wire 21 is small becomes long, resulting in increased electrical resistance.

[0032] 5(b), it is preferable that the lengths L1 and L2 of the first conductor wire 21 in the longitudinal direction between the exposed parts 211 and 212 of the first conductor wire 21 exposed from the holding member 3 and the recess 210 are each 0.5 mm or more. This is because, in the range of less than 0.5 mm along the longitudinal direction of the first conductor wire 21 from the recess 210, the roundness of the first conductor wire 21 may be reduced due to the influence of an external force when the recess 210 is formed, and the first conductor wire 21 may not be securely held between the upper and lower dies of the mold used for molding. In addition, by setting L1 and L2 to 0.5 mm or more, it is possible to suppress the first conductor wire 21 in the recess 210 from being broken due to vibrations generated during rotation of the three-phase motor 10 or vibrations of the vehicle.

[0033] From the viewpoint of further reducing the risk of the first conductor wire 21 in the recess 210 being broken due to vibrations generated during rotation of the three-phase motor 10 or vibrations of the vehicle, it is more preferable to set L1 and L2 to 1.0 mm or more. Also, by setting L1 and L2 to 10.0 mm or less, it is possible to prevent the holding member 3 from becoming large.

[0034] In addition, the lengths L1 and L2 refer to the shortest distance from the portion where the recess 210 is formed to the lead-out surfaces 3a and 3b of the holding member 3 from which the first conductor wire 21 is led out, when the lead-out surfaces 3a and 3b are not perpendicular to the longitudinal direction of the first conductor wire 21.

[0035] (Functions and Effects of the First Embodiment) According to the first embodiment described above, it is possible to prevent the first to third conductive wires 21 to 23 from moving relative to the holding member 3 along their longitudinal directions.

[0036] [Second embodiment] Next, a second embodiment of the present invention will be described with reference to Fig. 6. In the first embodiment, a case where one recess 210 is formed in the first conductor wire 21 has been described, but in this embodiment, a plurality of (two) recesses 210 are formed in the first conductor wire 21 in a portion covered by the holding member 3. Although not shown in the figure, a plurality of recesses 220, 230 are also formed in the second and third conductor wires 22, 23, respectively.

[0037] Fig. 6(a) is an enlarged view showing the periphery of two recesses 210 formed in the first conductor wire 21 before it is covered with the holding member 3. Fig. 6(b) is an enlarged view showing the periphery of two recesses 210 of the first conductor wire 21 covered with the holding member 3. In Figs. 6(a) and (b), components common to the first embodiment are denoted by the same reference numerals as those in Figs. 5(a) and (b) and redundant explanations will be omitted.

[0038] Locking portions 311, 312 formed by molding the holding member 3 are respectively introduced into the two recesses 210 of the first conductor wire 21, thereby preventing the first conductor wire 21 from slipping out. Each recess 210 has a bathtub shape similar to that described with reference to Fig. 5(a).

[0039] The two recesses 210 are formed at the same position in the longitudinal direction of the first conductor wire 21. Such two recesses 210 can be easily formed, for example, by using a tool having two protrusions having shapes corresponding to the respective recesses 210 and sandwiching the first conductor wire 21 in the diametrical direction between these two protrusions.

[0040] 6(a), assuming that the depths of the two recesses 210 in the radial direction of the first conductor wire 21 are d1 and d2, respectively, the sum d3 (=d1+d2) of these depths d1 and d2 is desirably 5% or more and less than 50% of the diameter D of the first conductor wire 21. If the sum d3 is less than 5% of the diameter D of the first conductor wire 21, the effect of preventing the first conductor wire 21 from coming loose will be reduced, and if the sum d3 is 50% or more of the diameter D of the first conductor wire 21, the cross-sectional area of ​​the portion where the recesses 210 are formed will be too small, and the current flowing through the first conductor wire 21 will be concentrated in that portion, making it easy for heat to be generated.

[0041] The second embodiment described above also provides the same functions and effects as the first embodiment.

[0042] (Summary of the embodiment) Next, the technical ideas grasped from the above-described embodiment will be described by using the reference numerals and the like in the embodiment. However, the reference numerals and the like in the following description do not limit the components in the claims to the members and the like specifically shown in the embodiment.

[0043] [1] A wiring component (1) comprising: a conductive wire (21) made of a single wire; and a holding member (3) made of resin that covers a longitudinal portion of the conductive wire (21) to hold the conductive wire (21), wherein the conductive wire (21) has at least one recess (210) in the portion covered by the holding member (3), and longitudinal movement of the conductive wire (21) relative to the holding member (3) is suppressed by engagement with a portion (31 / 311, 312) of the holding member (3) introduced into the recess (210).

[0044] [2] The wiring component (1) described in [1], wherein the conductive wire (21) has one recess (210) in a portion covered by the holding member (3), and the depth (d) of the recess (3) is 5% or more and less than 50% of the diameter (D) of the conductive wire (21).

[0045] [3] The wiring component (1) described in [1], wherein the conductive wire (21) has a plurality of the recesses (210) in a portion covered by the holding member (3), and the sum of the depths (d1, d2) of the respective recesses (210) is 5% or more and less than 50% of the diameter of the conductive wire (21).

[0046] [4] The wiring component (1) according to any one of [1] to [3], wherein the length of the recess (210) in the longitudinal direction (L) is 5% or more of the diameter of the conductive wire (21).

[0047] [5] The wiring component (1) according to any one of [1] to [4], wherein the distance between the exposed portion (211, 212) of the conductor wire (21) exposed from the holding member (3) and the recess (210) is 0.5 mm or more.

[0048] [6] The wiring component (1) according to any one of [1] to [4], wherein the recess (210) has a planar bottom surface (210a) extending along the longitudinal direction, and a pair of side surfaces (210b, 210c) facing each other in the longitudinal direction across the bottom surface (210a), and R portions (210d, 210e) are formed between the bottom surface (210a) and the pair of side surfaces (210b, 210c), respectively.

[0049] Although the embodiments of the present invention have been described above, the invention according to the claims is not limited to the above embodiments. It should be noted that not all of the combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

[0050] Furthermore, the present invention can be modified appropriately without departing from the spirit and scope of the present invention. For example, in the above embodiment, the first to third conductive wires 21 to 23 are held by the holding member 3, but the present invention is not limited to this, and the holding member 3 may hold only the first conductive wire 21.

[0051] In the above embodiment, the wiring component 1 is used to connect the ends of the windings 121 to 123 of the three-phase motor 10 to the terminal block 5, but the use of the wiring component 1 is not limited to this.

[0052] Furthermore, in the above embodiment, the holding member 3 has been described as being formed by solidifying molten resin, but the holding member 3 may also be formed by solidifying molten metal.

[0053] Furthermore, in the above embodiment (particularly FIG. 2), an example is shown in which the holding member 3 is not fixed to the motor (three-phase motor 10), but the holding member 3 may be fixed to the motor (three-phase motor 10). Furthermore, without being limited thereto, the holding member 3 may be fixed to a member (for example, a vehicle body) other than the motor (three-phase motor 10). [Explanation of symbols]

[0054] 1...Wiring parts 21 to 23: First to third conductive wires 210, 220, 230…Concave 210a…Bottom surface 210b,210c…side 210d,210e…R section 211,212...Exposed part 3…Retaining member 31, 311, 312…Latching part

Claims

1. A wiring component for supplying current to a motor having a rotor, The present invention comprises: a plurality of conductor wires each having a circular cross section and each made of a solid wire, the conductor wires including a metal conductor and an insulator covering the metal conductor; and a holding member for holding the plurality of conductor wires by covering a portion of the conductor wires in the longitudinal direction; Each of the plurality of conductor wires has two recesses in a portion covered by the holding member, the two recesses are formed to sandwich the conductor wire in a direction intersecting a longitudinal direction of the conductor wire, Each of the two recesses has a length in the longitudinal direction of the conductor wire that is longer than its depth, The two recesses are engaged with portions of the holding member that are respectively introduced into the two recesses, the two recesses of each of the plurality of conductor wires are aligned in a rotation axis direction of the rotor, Each of the two recesses has a planar bottom surface extending along the longitudinal direction and a pair of side surfaces facing each other in the longitudinal direction with the bottom surface therebetween, the two recesses are each formed by plastically deforming the conductor wire having a circular cross section, the bottom surface and the pair of side surfaces form an obtuse angle, the distance between the pair of side surfaces becomes wider as the distance between the bottom surface increases in a radial direction of the conductor wire, and an R portion is formed between the bottom surface and the pair of side surfaces. Wiring components.

2. the sum of the depths of the two recesses is equal to or greater than 5% and less than 50% of the diameter of the conductor wire, The length of the two recesses is 5% or more of the diameter of the conductor wire. The wiring component according to claim 1 .

3. The conductor wire has a distance of 0.5 mm or more between an exposed portion exposed from the holding member and each of the two recesses. The wiring component according to claim 1 .

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