Wiring components
By covering the resin holding member on the conductive wire and forming a recess, the problem of moving the conductive wire in the length direction is solved, and the stable fixation of the conductive wire is achieved, vibration and resonance are reduced, and the reliability of the connection is improved.
Patent Information
- Application Number
- CN201910730289.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2018-08-10
- Filing Date
- 2019-08-08
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2039-08-08
AI Technical Summary
In the prior art, the conductive wires are subject to concerns about moving relative to the fixed member in the length direction, especially when the motor rotates, vibration and resonance are prone to occur.
A holding member composed of resin is used to cover the conductive wire and form a recess in the length direction thereof, and the relative movement of the conductive wire is suppressed by the engagement between the conductive wire and the holding member.
Effectively suppress the movement of the conductive wire with respect to the holding member in the length direction, reduce vibration and resonance, and improve the stability of the conductive wire and the reliability of the connection.
Smart Images
Figure CN110829669B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a wiring member in which a conductive wire composed of a single wire is held by a holding member composed of a resin. Background Art
[0002] Nowadays, for example, in order to connect the end of a winding of a motor and a terminal board, a wiring member in which a plurality of conductive wires are held by a holding member is sometimes used.
[0003] Patent document 1 describes a fixing component installed in the middle of three power lines. The fixing component is a component that fixes the power lines to each other to restrict the movement in the circumferential direction of the stator of the motor, and has a rod shape that is bent along the circumferential direction of the stator. Three through holes are formed in the fixing component 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 installed on the fixing component.
[0004] Prior art literature
[0005] Patent Literature
[0006] Patent Document 1: Japanese Patent Application Publication No. 2011-259654 (see
[0038] to
[0043] , Figure 3 , Figure 4 ) Summary of the invention
[0007] Problems to be solved by the invention
[0008] In the structure described in Patent Document 1, there is a concern that the electric lines of force may move relative to the fixing member in the longitudinal direction thereof.
[0009] Therefore, an object of the present invention is to provide a wiring member in which a conductive wire is held by a holding member, and in which the conductive wire can be prevented from moving relative to the holding member in the longitudinal direction thereof.
[0010] Solutions to Solve Problems
[0011] The present invention aims to solve the above-mentioned problems and provides a wiring component, which has a conductive wire composed of a single wire and a retaining component composed of resin that covers a part of the conductive wire in the longitudinal direction and retains the conductive wire, and has at least one recess in the part of the conductive wire covered by the retaining component. The relative movement of the conductive wire in the longitudinal direction with respect to the retaining component is suppressed by engaging the conductive wire with a part of the retaining component introduced into the recess.
[0012] The effects of the invention are as follows.
[0013] According to the present invention, in the wiring member in which the conductive wire is held by the holding member, it is possible to suppress the conductive wire from moving relative to the holding member in the longitudinal direction thereof. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a perspective view showing the wiring member according to the first embodiment of the present invention together with a three-phase motor.
[0015] Figure 2 (a) is a top view showing a wiring component and a three-phase motor, and (b) is a side view showing a wiring component and a three-phase motor.
[0016] Figure 3 It is a perspective view showing a wiring member.
[0017] Figure 4 It is an explanatory diagram showing the portions of the first to third conductor lines that are covered by the holding member.
[0018] Figure 5 (a) is an enlarged view showing the periphery of the recessed portion of the first conductor wire before being covered by the holding member, and (b) is an enlarged view showing the periphery of the recessed portion of the first conductor wire after being covered by the holding member.
[0019] Figure 6 A wiring component according to a second embodiment of the present invention is shown, wherein (a) is an enlarged view showing the periphery of two recesses of a first conductor line before being covered by a retaining component, and (b) is an enlarged view showing the periphery of two recesses of a first conductor line after being covered by a retaining component.
[0020] Explanation of symbols
[0021] 1—wiring component, 21~23—first conductive wire to third conductive wire, 210, 220, 230—recess, 210a—bottom surface, 210b, 210c—side surface, 210d, 210e—arc portion, 211, 212—exposed portion, 3—holding component, 31, 311, 312—locking portion. DETAILED DESCRIPTION
[0022] [First embodiment]
[0023] Figure 1 This is a perspective view showing the wiring member 1 according to the first embodiment of the present invention together with a three-phase motor 10 to which current is supplied by the wiring member 1 . Figure 2 (a) is a top view showing the wiring member 1 and the three-phase motor 10, Figure 2 (b) is a side view showing the wiring member 1 and the three-phase motor 10 . Figure 2 In (b), a portion of the three-phase motor 10 is cut away to show its internal structure.
[0024] The three-phase motor 10 is mounted on a vehicle as a driving source for traveling, for example, and is supplied with a three-phase alternating current from an inverter (not shown) via a terminal board 5 and a wiring member 1 .
[0025] The three-phase motor 10 includes a motor housing 11 having a bottom and being cylindrical, a stator 12 housed in the motor housing 11, a rotor 13 arranged on the inner side of the stator 12, a shaft 14 penetrating the center portion of the rotor 13 and supported so as to be rotatable together with the rotor 13, and a cover member 15 made of molded resin covering the opening portion of the motor housing 11.
[0026] The stator 12 has an annular stator core 120 surrounding the rotor 13, and windings 121 to 123 of the U phase, V phase, and W phase are wound around it. More specifically, any one of the windings 121 to 123 of the U phase, V phase, and W phase is wound around 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 to 123 are flat insulated wires having an insulating coating layer made of enamel formed on the outer peripheral surface of a conductor made of copper. Parts of the windings 121 to 123 are exposed from the cover member 15 to the outside of the motor housing 11 and are molded on the cover member 15.
[0027] The rotor 13 includes a cylindrical rotor core 131 having a through hole through which the shaft 14 is inserted, and a magnet 132 disposed on the outer periphery of the rotor core 131. The magnet 132 is provided with a plurality of magnetic poles so that the S pole and the N pole are alternately present. The shaft 14 is supported by a bearing (not shown) so as to be rotatable relative to the motor housing 11 with the rotation axis O as the center.
[0028] Figure 3 1 is a perspective view showing a wiring component 1. The wiring component 1 includes: first to third conductor wires 21 to 23 provided corresponding to the U phase, the V phase, and the W phase, respectively; a holding component 3 made of resin for holding the first to third conductor wires 21 to 23; and first to third connection terminals 41 to 43 connected to the terminal board 5.
[0029] 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 board 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 board 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 board 5. In addition, in the present embodiment, the other end of each of the first conductor wire 21 to the third conductor wire 23 is connected to the terminal board 5 via the first connection terminal 41 to the third connection terminal 43, but it is not limited to this. For example, the ends of the first conductor wire 21 to the third conductor wire 23 on the terminal board 5 side may be bent in an arc shape or a ring shape and directly connected to the terminal board 5.
[0030] The terminal plate 5 has a plurality of (three) washers (not shown), and the first connection terminal 41 to the third connection terminal 43 are connected by bolts 51 to 53 (see Figure 1 and Figure 2 The terminal board 5 is fixed to the vehicle body by a fixing member (not shown), and the washer is electrically connected to the output terminal of the inverter through a wiring harness.
[0031] The first to third conductor wires 21 to 23 are formed of a rigid single wire, and the shape of the cross section perpendicular to the length direction is circular. The first to third conductor wires 21 to 23 are formed by covering a metal conductor made of copper with an insulator such as enamel, and the insulator is removed at both ends to expose the metal conductor.
[0032] The connection between the first conductor wire 21 to the third conductor wire 23 and the windings 121 to 123 is performed by welding. One end of the first conductor wire 21 to the third conductor wire 23 welded to the ends 121a, 122a, 123a of the windings 121 to 123 exposed from the cover member 15 is flattened from a circular cross-section to a flat cross-section, thereby facilitating the connection with the windings 121 to 123. The other ends of the core wires of the first conductor wire 21 to the third conductor wire 23 are riveted to the first connection terminal 41 to the third connection terminal 43, respectively. The first conductor wire 21 to the third conductor wire 23 are bent at multiple locations between the two ends. Moreover, the bent state is maintained by the rigidity of the first conductor wire 21 to the third conductor wire 23.
[0033] The first to third conductors 21 to 23 are held by the holding member 3, so that the connection work of the first to third conductors 21 to 23 and the windings 121 to 123 and the fixing work of the first to third connection terminals 41 to 43 to the terminal board 5 are facilitated. In addition, the resonance of the first to third conductors 21 to 23 due to vibration generated when the three-phase motor 10 rotates is suppressed. The resonance suppression effect is significant in the first conductor 21, which is the longest among the first to third conductors 21 to 23.
[0034] The holding member 3 is molded to cover a portion of the length direction of the first to third conductor wires 21 to 23. In the molding, a portion of the straight-line portions of the first to third conductor wires 21 to 23 are arranged inside a metal mold for resin molding, and molten resin is injected into the metal mold and solidified. Thus, the holding member 3 is molded, and the first to third conductor wires 21 to 23 are held by the holding member 3. In the present embodiment, the holding member 3 is in the shape of a rod bent along the circumferential direction of the stator 12, and the shape of the cross section perpendicular to the circumferential direction is rectangular. The holding member 3 is made of a resin such as PPS (polyphenylene sulfide), PA (polyamide), or PBT (polybutylene terephthalate).
[0035] Figure 4 1 and 2 are explanatory diagrams showing the portions of the first to third conductor wires 21 to 23 that are covered by the holding member 3 . Figure 4 In FIG. 1 , the holding member 3 is shown by an imaginary line (two-dot chain line).
[0036] The first to third conductors 21 to 23 each have a recess 210, 220, 230 in their portions covered by the holding member 3. The recesses 210, 220, 230 are formed in a portion of the first to third conductors 21 to 23 covered by the holding member 3 so that the recesses 210, 220, 230 are not exposed to the outside of the holding member 3. The portions of the first to third conductors 21 to 23 covered by the holding member 3 are linear and parallel to each other.
[0037] Figure 5 (a) is an enlarged view showing the periphery of the recessed portion 210 of the first conductor line 21 covered by the holding member 3 . Figure 5 (b) is an enlarged view showing the periphery of the recess 210 of the first conductor 21 covered by the holding member 3. The recesses 220 and 230 of the second and third conductors 22 and 23 are formed similarly to the recess 210 of the first conductor 21.
[0038] The recess 210 has a planar bottom surface 210a extending in the length direction of the first conductor line 21, and a pair of side surfaces 210b and 210c facing each other in the length direction of the first conductor line 21 across the bottom surface 210a, and arc portions (R portions) 210d and 210e are formed between the bottom surface 210a and the pair of side surfaces 210b and 210c, respectively. Figure 5 As shown in (a), when the recess 210 is viewed from a direction perpendicular to the longitudinal direction of the first conductor line 21 and parallel to the bottom surface 210a, the arc portions 210d and 210e are formed in an arc shape, and the recess 210 as a whole is formed in a bathtub shape.
[0039] In the present embodiment, the bottom surface 210a and the pair of side surfaces 210b and 210c form an obtuse angle, and the distance between the pair of side surfaces 210b and 210c increases as they are farther from the bottom surface 210a in the radial direction of the first conductor 21. The recess 210 is formed, for example, by pressing a tool having a convex portion having a shape corresponding to the recess 210 onto the outer peripheral surface 21a of the first conductor 21 to plastically deform the first conductor 21. Moreover, the present invention is not limited thereto, and the recess 210 may be formed by cutting a portion of the first conductor 21. By forming the recess 210 in this way, a portion of the first conductor 21 does not protrude in the form of a burr from the outer peripheral surface 21a of the first conductor 21 where the recess 210 is not formed, and it is possible to prevent the burr-like protrusion from separating from the first conductor 21 during molding and remaining in the retaining member 3.
[0040] When the holding member 3 is molded, a portion of the molten resin is introduced into the recess 210 to form a locking portion 31 for preventing the first conductor 21 from coming off. In other words, the first conductor 21 is prevented from moving relative to the holding member 3 in the length direction by engaging with the locking portion 31, which is a portion of the holding member 3 introduced into the recess 210.
[0041] like Figure 5 As shown in (a), the depth d of the recess 210 in the radial direction of the first conductor 21 is preferably not less than 5% and not more than 50% of the diameter D of the first conductor 21. This is because: if the depth d of the recess 210 is less than 5% of the diameter D of the first conductor 21, the effect of preventing the first conductor 21 from falling out is reduced, and if the depth d of the recess 210 is not less than 50% of the diameter D of the first conductor 21, the cross-sectional area of the portion where the recess 210 is formed is too small, and the current flowing through the first conductor 21 is likely to be concentrated in this portion and generate heat. In addition, by setting the depth d of the recess 210 to less than 50% of the diameter D of the first conductor 21, it is possible to suppress the concern that the first conductor 21 at the recess 210 will be bent due to the resin pressure when the holding component 3 is molded.
[0042] The length L of the recess 210 in the longitudinal direction of the first conductor 21 is preferably 5% or more of the diameter D of the first conductor 21. This is because if the length L of the recess 210 is less than 5% of the diameter D of the first conductor 21, the effect of preventing the first conductor 21 from falling off becomes small. In addition, the length L of the recess 210 is preferably 0.5 mm or more. This is because if the length L of the recess 210 is less than 0.5 mm, there is a concern that the molten resin will not be sufficiently introduced into the recess 210 during molding.
[0043] 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 line 21) is greater than 5% of the diameter D of the first conductor line 21 and greater than 0.5 mm. In the present embodiment, the length L of the recess 210 is greater than the diameter D of the first conductor line 21.
[0044] If the upper limit of the length L of the recess 210 is less than the width W of the holding member 3 along the length direction of the first conductor line 21 (see Figure 5 (b)) is not particularly limited, but when the width of the retaining member 3 is large, it is preferably less than 5 times (500%) the diameter D of the first conductor line 21. This is because if the length L of the recess 210 is too long, the range of the smaller cross-sectional area of the first conductor line 21 becomes longer, and the resistance increases.
[0045] And, if Figure 5 As shown in (b), the lengths L1 and L2 between the exposed portions 211 and 212 of the first conductor 21 exposed from the retaining member 3 and the recess 210 in the longitudinal direction of the first conductor 21 are preferably 0.5 mm or more, respectively. This is because: within the range of less than 0.5 mm from the recess 210 along the longitudinal direction of the first conductor 21, there is a concern that the roundness of the first conductor 21 is reduced due to the influence of external force when the recess 210 is formed, and there is a concern that the first conductor 21 cannot be reliably held between the upper mold and the lower mold of the metal mold used for molding. In addition, by making L1 and L2 0.5 mm or more, it is possible to suppress the concern that the first conductor 21 at the recess 210 is bent due to the vibration generated when the three-phase motor 10 rotates or the vibration of the vehicle.
[0046] Furthermore, L1 and L2 are preferably 1.0 mm or more to further reduce the risk of bending of the first conductor wire 21 in the recess 210 due to vibrations generated during rotation of the three-phase motor 10 or vibrations of the vehicle. Furthermore, by making L1 and L2 10.0 mm or less, the size of the retaining member 3 can be reduced.
[0047] When the lead-out surfaces 3a and 3b of the holding member 3 for leading out the first conductor 21 are not perpendicular to the longitudinal direction of the first conductor 21, the lengths L1 and L2 are the shortest distances from the portion where the recess 210 is formed to the lead-out surfaces 3a and 3b.
[0048] (Functions and Effects of First Embodiment)
[0049] According to the first embodiment described above, it is possible to suppress the first to third conductive wires 21 to 23 from moving relative to the holding member 3 in the longitudinal direction thereof.
[0050] [Second embodiment]
[0051] Next, refer to Figure 6 A second embodiment of the present invention will be described. In the first embodiment, a case where one recess 210 is formed in the first conductor line 21 is described, but in this embodiment, a plurality of (two) recesses 210 are formed in the first conductor line 21 at the portion covered by the holding member 3. In addition, a plurality of recesses 220 and 230 are also formed in the second conductor line 22 and the third conductor line 23, respectively, but these are omitted from the illustration.
[0052] Figure 6 (a) is an enlarged view showing the periphery of two recessed portions 210 formed in the first conductor line 21 before being covered by the holding member 3 . Figure 6 (b) is an enlarged view showing the periphery of the two recessed portions 210 of the first conductor line 21 covered by the holding member 3 . Figure 6 In (a) and (b) of the present invention, the components common to the first embodiment are marked with the same reference numerals as in the first embodiment. Figure 5 The same symbols are used for marking (a) and (b), and repeated descriptions are omitted.
[0053] The locking portions 311 and 312 formed by molding the holding member 3 are respectively introduced into the two recesses 210 of the first conductor 21 to prevent the first conductor 21 from falling out. Figure 5 The shape of (a) is the same as the bathtub shape.
[0054] The two recesses 210 are formed at the same position in the longitudinal direction of the first conductor line 21. For example, the two recesses 210 can be easily formed by using a tool having two protrusions corresponding to the shapes of the respective recesses 210 and clamping the first conductor line 21 in the radial direction with the two protrusions.
[0055] like Figure 6 As shown in (a), if the depths of the two recesses 210 in the radial direction of the first conductor 21 are set to d1 and d2 respectively, the total value d3 (= d1 + d2) of the depths d1 and d2 is preferably greater than 5% and less than 50% of the diameter D of the first conductor 21. This is because: if the total value d3 is less than 5% of the diameter D of the first conductor 21, the effect of preventing the first conductor 21 from falling off becomes small, and if the total value d3 is greater than 50% of the diameter D of the first conductor 21, the cross-sectional area of the portion where the recess 210 is formed is too small, and the current flowing through the first conductor 21 is likely to be concentrated in this portion to generate heat.
[0056] According to the second embodiment described above, the same operations and effects as those of the first embodiment can be obtained.
[0057] (Summary of Implementation Methods)
[0058] Next, the technical ideas grasped from the above-described embodiments will be described by citing the symbols in the embodiments. However, each symbol in the following description does not limit the constituent elements of the claims to the components and the like specifically shown in the embodiments.
[0059] [1] A wiring component 1, comprising a conductive wire 21 composed of a single wire and a retaining component 3 composed of a resin that covers a portion of the conductive wire 21 in the longitudinal direction and retains the conductive wire 21, wherein the portion of the conductive wire 21 covered by the retaining component 3 has at least one recess 210, and the conductive wire 21 is prevented from moving relative to the retaining component 3 in the longitudinal direction by engaging with a portion 31, 311, 312 of the retaining component 3 introduced into the recess 210.
[0060] [2] The wiring component 1 according to [1] above has one recess 210 in the portion of the conductive wire 21 covered by the retaining component 3 , and a depth d of the recess 3 is greater than or equal to 5% and less than 50% of a diameter D of the conductive wire 21 .
[0061] [3] According to the wiring component 1 described in [1] above, a plurality of the above-mentioned recesses 210 are provided in the portion of the above-mentioned conductive wire 21 covered by the above-mentioned retaining component 3, and the total value of the depth d1 and d2 of each of the above-mentioned recesses 210 is greater than 5% and less than 50% of the diameter of the above-mentioned conductive wire 21.
[0062] [4] According to the wiring member 1 described in any one of [1] to [3] above, the length of the recess 210 in the longitudinal direction L is 5% or more of the diameter of the conductive wire 21 .
[0063] [5] According to the wiring member 1 described in any one of [1] to [4] above, the interval between the exposed portion 211 , 212 of the conductor wire 21 exposed from the holding member 3 and the recessed portion 210 is 0.5 mm or more.
[0064] [6] According to the wiring component 1 described in any one of items [1] to [4] above, the above-mentioned recessed portion 210 has a planar bottom surface 210a extending along the above-mentioned longitudinal direction, and a pair of side surfaces 210b and 210c facing each other in the above-mentioned longitudinal direction across the bottom surface 210a, and arc portions 210d and 210e are respectively formed between the above-mentioned bottom surface 210a and the above-mentioned pair of side surfaces 210b and 210c.
[0065] The embodiments of the present invention have been described above, but the above embodiments do not limit the invention of the claims. Furthermore, it should be noted that all combinations of features described in the embodiments are not essential to solving the problems of the invention.
[0066] Furthermore, the present invention can be implemented with appropriate modifications without departing from the scope of the present invention. For example, in the above-mentioned embodiment, the case where the first conductive wire 21 to the third conductive wire 23 are held by the holding member 3 is described, but it is not limited to this, and only the first conductive wire 21 may be held by the holding member 3.
[0067] Furthermore, in the above-described embodiment, the case where the wiring member 1 is used to connect the ends of the windings 121 to 123 of the three-phase motor 10 and the terminal board 5 is described, but the use of the wiring member 1 is not limited to this.
[0068] Furthermore, in the above-described embodiment, the holding member 3 is described as being formed by solidifying a molten resin. However, the holding member 3 may be formed by solidifying a molten metal.
[0069] Furthermore, in the above-mentioned embodiments (especially Figure 2 ) shows an example in which the retaining member 3 is not fixed to the motor (three-phase motor 10), but the retaining member 3 may also be fixed to the motor (three-phase motor 10). Moreover, without being limited to this, the retaining member 3 may also be fixed to a member other than the motor (three-phase motor 10) (for example, a vehicle body).
Claims
1. A wiring component, characterized in that: The invention comprises: a conductive wire composed of a single wire; and a holding member covering a portion of the conductive wire in the longitudinal direction and holding the conductive wire, A recessed portion is provided in a portion of the conductive wire covered by the holding member, wherein a depth of the recessed portion is not less than 5% and less than 50% of a diameter of the conductive wire. The conductive wire is engaged with a portion of the holding member introduced into the recess to suppress the relative movement of the conductive wire with respect to the holding member in the longitudinal direction. The recessed portion includes a planar bottom surface extending in the longitudinal direction and a pair of side surfaces facing each other in the longitudinal direction across the bottom surface, and arc portions are respectively formed between the bottom surface and the pair of side surfaces.
2. The wiring member according to claim 1, wherein The conductive wire has one recessed portion at a portion covered by the holding member.
3. The wiring member according to claim 1, wherein The conductive wire has a plurality of recesses at a portion covered by the holding member. The total value of the depths of the respective recessed portions is not less than 5% and less than 50% of the diameter of the conductive wire.
4. The wiring member according to any one of claims 1 to 3, characterized in that The length of the recessed portion in the longitudinal direction is equal to or greater than 5% of the diameter of the conductive wire.
5. The wiring member according to any one of claims 1 to 3, characterized in that: The distance between the exposed portion of the conductive wire from the holding member and the recessed portion is 0.5 mm or more.