Bus bar assembly with magnetic body

Abstract

Disclosed is a bus bar assembly with a magnetic body capable of suppressing contact between a pair of bus bars. A bus bar assembly (10) with a magnetic body is provided with: a pair of bus bars (12, 14); an annular magnetic body (16) sleeved on the pair of bus bars (12, 14); and an insulating holding member (18) that holds the pair of bus bars (12, 14) and the magnetic body (16) in a non-contact state, the insulating holding member (18) having: an annular magnetic body housing cylinder section (36) that houses the magnetic body (16); and a pair of bus bar housing sections (42, 44) which are disposed across an insulating partition wall (40) extending in the axial direction and which respectively houses the pair of bus bars (12, 14), the insulating partition wall (40) penetrating through the inner hole (38) of the magnetic body housing cylinder section (36).

Description

Technical Field

[0001] This disclosure relates to a busbar assembly with a magnetic material. Background Technology

[0002] In vehicles such as electric vehicles and hybrid vehicles that are driven by electric motors, busbars for supplying large current flows are installed. In Patent Document 1, in order to eliminate noise from such busbars, a busbar assembly with a magnetic material such as a ferrite core wrapped around the busbar is proposed.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2019-186406 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, in the busbar assembly disclosed in Patent Document 1, a pair of busbars constituting a circuit are inserted side-by-side in a single inner hole within an annular core housing containing a ferrite core, with gaps between them. Therefore, since the busbars are only spatially separated, it is possible for a pair of busbars to come into contact with each other due to vibrations during vehicle operation, unexpected impacts, etc.

[0008] Therefore, a busbar assembly of a magnetic body capable of suppressing contact between a pair of busbars is disclosed.

[0009] Methods for solving problems

[0010] The disclosed busbar assembly with a magnetic body comprises: a pair of busbars; an annular magnetic body fitted over the pair of busbars; and an insulating retaining member that holds the pair of busbars and the magnetic body in a non-contact state. The insulating retaining member has: an annular magnetic body receiving cylinder portion that receives the magnetic body; and a pair of busbar receiving portions disposed apart by an insulating spacer wall, each receiving the pair of busbars. The insulating spacer wall extends axially through the inner hole of the magnetic body receiving cylinder portion.

[0011] Invention Effects

[0012] According to the present disclosure, the magnetic busbar assembly can suppress contact between a pair of busbars. Attached Figure Description

[0013] Figure 1 This is a perspective view of the busbar assembly with a magnetic body according to Embodiment 1.

[0014] Figure 2 yes Figure 1 The top view of the busbar assembly with magnetic material shown.

[0015] Figure 3 yes Figure 1 The diagram shows a bottom view of the busbar assembly with magnetic material.

[0016] Figure 4 yes Figure 2 Sectional view IV-IV in the diagram.

[0017] Figure 5 It is an enlarged representation Figure 2 The longitudinal section view of the VV section in the image.

[0018] Figure 6 It indicates composition Figure 1 A perspective view of the magnetic fixing clamp of the insulation retention component of the busbar assembly with magnetic material shown.

[0019] Figure 7 This means fixing the magnetic body to Figure 6 A three-dimensional view of the magnetic body fixing fixture shown.

[0020] Figure 8 This means that the outer sleeve of the cover is placed on Figure 7 The diagram shows a perspective view of a magnetic body housed within an insulating retaining member.

[0021] Figure 9 This indicates that one of a pair of busbars is assembled into Figure 8 A three-dimensional view showing the state of the insulation retention component. Detailed Implementation

[0022] <Description of embodiments of this disclosure>

[0023] First, embodiments of this disclosure will be described.

[0024] In the magnetic busbar assembly disclosed herein, (1) Includes: a pair of busbars; an annular magnetic body fitted over the pair of busbars; and An insulating retaining member holds the pair of busbars and the magnet in a non-contact state. The insulating retaining member has: an annular magnet receiving cylinder portion for receiving the magnet; and a pair of busbar receiving portions disposed apart by an insulating spacer wall, each receiving the pair of busbars. The insulating spacer wall passes through the inner hole of the magnet receiving cylinder portion and extends axially.

[0025] According to this method, the busbar assembly with a magnetic body maintains a pair of busbars and a magnetic body forming a circuit in a non-contact state through an insulating retaining member. Furthermore, a pair of busbar receiving portions are provided in the insulating retaining member, separated by an insulating spacer wall, each receiving portion housing a busbar. The insulating spacer wall penetrates the inner hole of the magnetic body receiving cylinder and extends axially. Therefore, compared to conventional structures where a pair of busbars inserted through the inner hole are only spatially separated, the risk of a pair of busbars contacting each other can be suppressed or avoided.

[0026] It should be noted that, as a toroidal magnetic material, well-known toroidal magnetic materials such as ferrite cores and nanocrystalline soft magnetic cores can all be used.

[0027] (2) In (1) above, preferably, the pair of busbar receiving portions are stacked in a first orthogonal direction orthogonal to the axial direction of the magnetic body receiving cylinder portion, separated by the insulating spacer wall, each busbar receiving portion has a height dimension that is larger than the plate thickness dimension of each busbar and is in the same direction as the first orthogonal direction, and each busbar receiving portion has a width dimension that is larger than the plate width dimension of each busbar and larger than the height dimension in a second orthogonal direction orthogonal to the first orthogonal direction.

[0028] Because the pair of busbar receiving portions are arranged with an insulating partition wall between them, the insulation of the pair of busbars housed therein can be advantageously ensured even when the busbar receiving portions are stacked in a first orthogonal direction (e.g., the vertical direction) orthogonal to the axial direction of the magnetic body receiving cylinder. Furthermore, the height dimension of each busbar receiving portion extending in the first orthogonal direction is larger than the thickness dimension of the busbar plate, and the width dimension extending in a second orthogonal direction orthogonal to the first orthogonal direction is larger than the width dimension of the busbar plate and larger than the height dimension. That is, the pair of busbar receiving portions stacked in the first orthogonal direction are designed to accommodate the height and width dimensions of a busbar in a flat state (with the plate thickness direction being the first orthogonal direction, e.g., the vertical direction). Therefore, compared to conventional structures where stacking in the first orthogonal direction (e.g., the vertical direction) is difficult, miniaturization of the busbar assembly with a magnetic body in the first orthogonal direction can be advantageously achieved while ensuring insulation.

[0029] (3) In (1) or (2) above, preferably, the magnetic body receiving cylinder portion of the insulation retaining member comprises: an inner hole forming cylinder portion, constituting the inner hole of the magnetic body receiving cylinder portion, extending in the axial direction with a flat rectangular frame cross-section in a first orthogonal direction orthogonal to the axial direction; a flange plate portion, protruding from the outer peripheral surface of one axial end side of the inner hole forming cylinder portion to the outer peripheral side; an elastic locking portion, formed on the outer peripheral surface of the other axial end side of the inner hole forming cylinder portion, capable of flexing and deforming inward in the first orthogonal direction; and a cover cylinder portion, which covers the rectangular frame shape of the inner hole forming cylinder portion. The outer peripheral surface of the magnetic body and the end face of the other end side of the axial direction are covered. The sleeve portion that is fitted onto the magnetic body can be assembled from the other end side of the axial direction of the inner hole forming cylinder portion toward the axial one end side by the flexural deformation of the elastic locking portion. At the assembly end position where the end face of the magnetic body at the axial one end side abuts the flange plate portion, the elastic locking portion elastically recovers. The magnetic body and the sleeve portion are positioned and held in the axial direction between the elastic locking portion and the flange plate portion. The magnetic body is covered all around the circumference by the inner hole forming cylinder portion, the flange plate portion and the sleeve portion.

[0030] By constructing the magnetic housing portion of the insulation retaining member into (i) an inner hole forming cylinder portion and a flange plate portion protruding to one axial end, and (ii) a cover portion covering the outer peripheral surface and the end face to the other axial end, and by configuring it so that the magnetic body and the cover portion can be assembled to the inner hole forming cylinder portion from the other axial end, a magnetic housing portion with excellent manufacturability and assembly workability can be provided. In particular, by providing an elastic locking portion to the other end of the inner hole forming cylinder portion, it is possible to stably achieve axial assembly of the cover portion based on the flexural deformation of the elastic locking portion and positioning retention of the magnetic body and the cover portion based on the elastic recovery of the elastic locking portion.

[0031] (4) In (3) above, it is preferable that the inner circumferential surface of the axial end side of the cover portion covers the protruding end face of the flange plate portion from the outer circumferential side. This is because by having the inner circumferential surface of the axial end side of the cover portion cover the protruding end face of the flange plate portion from the outer circumferential side, the insulation between the magnet and the busbar can be stably ensured.

[0032] (5) In any of (1) to (4) above, preferably, the busbar receiving portion disposed on one side of the insulating spacer has: a support receiving portion configured to include the insulating spacer protruding toward the other axial end of the magnetic body receiving cylinder portion and a pair of sidewall portions protruding from both sides of the insulating spacer; and an elastically engaging portion protruding toward one axial end of the magnetic body receiving cylinder portion, allowing the busbar to be inserted from one axial end of the busbar receiving portion toward the other axial end by means of flexural deformation, and engaging with the engaging portion disposed on the busbar by means of elastic recovery, thereby preventing the busbar from displacing in the axial direction.

[0033] In a busbar receiving section disposed on one side of an insulating spacer and housing a busbar that extends axially from one end of the magnetic material receiving cylinder to the other end of the magnetic material receiving cylinder, a support receiving section is provided. This support receiving section is configured to include an insulating spacer protruding axially to the other end and a pair of sidewall portions protruding from its two side edges. Thus, the support receiving section can support the busbar relative to the busbar receiving section disposed on one side, allowing the magnetic material receiving cylinder to extend axially. Furthermore, an elastically engaging portion is provided on the axial end side in the direction opposite to the insertion direction of the busbar. This elastically engaging portion allows the busbar to be inserted and elastically recovers through flexural deformation, thereby engaging with the engaging portion of the busbar to prevent displacement axially. Thus, the busbar housed in the busbar receiving section disposed on one side of the insulating spacer can be stably and fixedly held.

[0034] (6) In any of (1) to (5) above, preferably, the busbar receiving portion disposed on the other side of the insulating spacer has: a support receiving portion configured to include the insulating spacer protruding toward the axial end of the magnetic body receiving cylinder portion and a pair of sidewall portions protruding from the two side edges of the insulating spacer; and an elastically engaging portion protruding toward the other axial end of the magnetic body receiving cylinder portion, which allows the busbar to be inserted from the other axial end of the busbar receiving portion toward the axial end by means of flexural deformation, and engages with the engaging portion disposed on the busbar by means of elastic recovery, thereby preventing the busbar from displacing in the axial direction.

[0035] In the busbar receiving section, which is located on the other side of the insulating partition wall and houses the busbar that extends from one end of the magnetic body receiving cylinder towards the other end of the magnetic body receiving cylinder, the same effect as described in (5) can be achieved by providing a support receiving section and an elastically engaging section. Therefore, by combining the above (5) and this method (6), a pair of busbars extending in opposite directions in the axial direction of the magnetic body receiving cylinder can be more reliably and easily assembled and held in each busbar receiving section.

[0036] <Detailed description of the embodiments of this disclosure>

[0037] The following description, with reference to the accompanying drawings, illustrates specific examples of the magnetic busbar assembly of this disclosure. It should be noted that this disclosure is not limited to these examples, but rather to the modifications shown in the claims, which are intended to include all changes within the meaning and scope equivalent to the claims.

[0038] <Implementation Method 1>

[0039] The following uses Figures 1 to 9 The magnetic busbar assembly 10 according to Embodiment 1 of this disclosure will be described. This magnetic busbar assembly 10, for example, is installed in an electrical connection box in an electric vehicle or hybrid vehicle, and includes a pair of busbars 12, 14 (positive-side busbar 12 and negative-side busbar 14) and an annular ferrite core 16, which serves as the magnetic material, surrounding each of these busbars 12, 14. The two ends of each busbar 12, 14 are electrically connected to on-board components such as a motor or PCU (power control unit), and the ferrite core 16 suppresses noise from power transmission between on-board components via these busbars 12, 14. It should be noted that in a vehicle, the magnetic busbar assembly 10 can be configured in any orientation, but below, the upper orientation is preferred. Figure 4 The top and bottom of the middle are used as Figure 4 The bottom and left sides are used as Figure 2 The top and right sides are used as Figure 2 The bottom and front of the middle are used as Figure 2 The left and rear sides are used as Figure 2 The explanation will be provided on the right side of the diagram. Additionally, regarding multiple identical components, sometimes only some components are labeled, while the labels are omitted for the others.

[0040] <Magnetic Busbar Assembly 10>

[0041] As described above, the magnetic busbar assembly 10 includes a pair of positive and negative side busbars 12 and 14, and an annular ferrite core 16, which is a magnetic material, surrounding each of the busbars 12 and 14. Furthermore, the magnetic busbar assembly 10 includes a pair of busbars (positive and negative side busbars 12 and 14) and an insulating retaining member 18 that holds the magnetic material (ferrite core 16) in a non-contact state. It should be noted that in Embodiment 1, both the positive side busbar 12 and the negative side busbar 14 are constructed by overlapping two busbars that are substantially the same shape; however, from now on, each will be described as a single positive side busbar 12 and a single negative side busbar 14. The two busbars constituting these positive and negative side busbars 12 and 14 can be fixed to each other by welding or the like, or they can be overlapped without being fixed.

[0042] <A pair of busbars (busbars 12 and 14 on the positive and negative sides)>

[0043] The positive and negative side busbars 12 and 14 are formed by stamping conductive metal plates into a predetermined shape, and both extend as a whole in the front-to-back direction. Multiple bolt through holes 20 are formed at both ends of each busbar 12 and 14 in the thickness direction (vertical direction). It should be noted that the positive side busbar 12 has an upwardly curved portion 22 at its rear end. Furthermore, at the rear end of the positive side busbar 12, a slit-shaped positive side engaging portion 24, opening to the right and extending vertically, is provided at the right end, forward of the curved portion 22. On the other hand, negative side engaging portions 26, 26, are slit-shaped negative side engaging portions, opening outwards in the left-right direction and extending vertically, on the left and right sides of the front end of the negative side busbar 14.

[0044] <Magnetic Material (Ferrite Core 16)>

[0045] Also Figure 4 , 5 As shown, the ferrite core 16 is generally annular, and the internal space 27 of the ferrite core 16 has a roughly rectangular cross-section with a maximum horizontal dimension larger than its maximum vertical dimension. The maximum vertical dimension and the maximum horizontal dimension of the internal space 27 are slightly larger than the vertical dimension and the horizontal dimension of the inner hole forming cylinder 50 described later, respectively, and the inner hole forming cylinder 50 can be inserted into the internal space 27.

[0046] The ferrite core 16 has a defined longitudinal dimension. Specifically, the ferrite core 16 is generally cylindrical, with a circumferential wall 28 extending continuously in the circumferential direction. Thus, the ferrite core 16 has a rear end face 30 extending in a generally annular shape as one axial end face in the longitudinal direction of the inner hole 38 of the magnetic material receiving cylinder portion 36 (described later), and a front end face 32 extending in a generally annular shape as the other axial end face. Furthermore, the ferrite core 16 has an outer peripheral surface 34 extending into a generally rectangular frame shape or a generally elongated cylindrical shape between these rear end faces 30 and the front end face 32 in the longitudinal direction. The ferrite core 16 uses a known material, but in Embodiment 1, the ferrite core 16 is formed of Mn-Zn based ferrite.

[0047] <Insulation Retention Component 18>

[0048] The insulating retaining member 18 has an annular magnetic material receiving cylinder 36 for receiving an annular magnetic material (ferrite core 16) and an insulating spacer 40 extending axially (front-back direction) through an inner hole 38 of the magnetic material receiving cylinder 36. Additionally, the insulating retaining member 18 has a pair of busbar receiving portions 42 and 44 (positive-side busbar receiving portion 42 and negative-side busbar receiving portion 44), which are separated by the insulating spacer 40 and respectively receive the aforementioned pair of busbars (positive-side and negative-side busbars 12 and 14). These positive-side and negative-side busbar receiving portions 42 and 44 are stacked in a first orthogonal direction (vertical direction) orthogonal to the axial direction of the magnetic material receiving cylinder 36, separated by the insulating spacer 40. In Embodiment 1, a positive electrode side busbar receiving portion 42 is provided above one side of the insulating spacer 40, and a negative electrode side busbar receiving portion 44 is provided below the other side of the insulating spacer 40.

[0049] Furthermore, in Embodiment 1, the insulation retention member 18 is configured to include Figure 6 The magnetic body fixing clamp 46 and the cover portion 48 covering the outer peripheral surface 34 and the end face (front end face 32) of the magnetic body (ferrite core 16) on the other axial side are shown. These magnetic body fixing clamps 46 and cover portions 48 are formed, for example, from a rigid synthetic resin with insulating properties. The magnetic body fixing clamp 46 has the aforementioned insulating spacer wall 40 and positive and negative electrode side busbar receiving portions 42, 44. Furthermore, as described later, the aforementioned magnetic body receiving cylinder portion 36 is constructed by assembling the cover portion 48 to the magnetic body fixing clamp 46. That is, the region between the magnetic body fixing clamp 46 provided on the inner peripheral side and the cover portion 48 provided on the outer peripheral side forms an annular magnetic body receiving cylinder portion 36, and an inner hole 38 of the magnetic body receiving cylinder portion 36 extending through in the axial (front-back direction) direction is formed in the magnetic body fixing clamp 46.

[0050] <Magnetic Fixture 46>

[0051] The magnetic body retaining cylinder 46 constituting the magnetic body receiving cylinder portion 36 includes an inner hole forming cylinder portion 50. This inner hole forming cylinder portion 50 forms the inner hole 38 of the magnetic body receiving cylinder portion 36 and extends axially (front-back direction) with a rectangular frame cross-section that is flat in a first orthogonal direction (vertical direction). The inner hole forming cylinder portion 50 is formed in the middle portion of the magnetic body retaining cylinder 46 in the front-back direction and is configured to include an upper wall portion 52 on the upper side and a lower wall portion 54 on the lower side, as well as a left wall portion 56 and a right wall portion 58 on the left and right sides. Each of these wall portions 52, 54, 56, and 58 has a substantially constant thickness dimension along its substantially entire length in the front-back direction, and the shapes of the inner and outer peripheral surfaces are both formed into a horizontally elongated rectangular cylinder shape with a horizontal dimension larger than the vertical dimension. Furthermore, within the inner hole 38 of the magnetic material receiving cylinder portion 36, which is composed of these wall portions 52, 54, 56, and 58, an insulating spacer wall 40 extends axially and penetrates through it, dividing the inner hole 38 vertically. That is, the portion of the inner hole 38 above the insulating spacer wall 40 forms the positive electrode side busbar receiving portion 42, and the portion of the inner hole 38 below the insulating spacer wall 40 forms the negative electrode side busbar receiving portion 44.

[0052] <Insulating Spacer 40>

[0053] The insulating spacer 40 is generally flat with a rectangular cross-section, and its left-right dimension is larger than its top-bottom dimension. The left and right ends of the insulating spacer 40 are respectively connected to the left wall portion 56 and the right wall portion 58 of the inner hole forming cylinder portion 50. Thus, the positive electrode side busbar receiving portion 42 is formed by the area surrounded by the upper portion of the upper wall portion 52, the left wall portion 56, and the right wall portion 58 and the insulating spacer 40, and the negative electrode side busbar receiving portion 44 is formed by the area surrounded by the lower portion of the lower wall portion 54, the left wall portion 56, and the right wall portion 58 and the insulating spacer 40. Furthermore, the insulating spacer 40 has a longer length (front-to-back dimension) than the magnetic material receiving cylinder portion 36, and the insulating spacer 40 protrudes to both sides in the front-to-back direction from the magnetic material receiving cylinder portion 36.

[0054] <A pair of busbar housings (positive and negative side busbar housings 42, 44)>

[0055] Each busbar receiving section 42, 44 has a specified vertical dimension within the inner hole 38, as shown in the figure. Figure 5As shown, they have a generally rectangular cross-sectional shape. In Embodiment 1, each busbar receiving portion 42, 44 is formed with a cross-sectional shape having approximately equal sizes. Each busbar receiving portion 42, 44 has a height dimension that is larger than the plate thickness dimension of each busbar 12, 14 (the plate thickness dimension of the portion inserted into each busbar receiving portion 42, 44, i.e., the vertical dimension) and is in the same direction as the first orthogonal direction (vertical direction). In addition, in the second orthogonal direction (left-right direction) orthogonal to the first orthogonal direction, each busbar receiving portion 42, 44 has a width dimension that is larger than the plate width dimension of each busbar 12, 14 (the plate width dimension of the portion inserted into each busbar receiving portion 42, 44, i.e., the left-right dimension).

[0056] Each busbar receiving portion 42, 44 is configured to include portions on both sides of the inner hole forming cylinder 50 in the front-rear direction, in addition to the portion formed within the inner hole 38. Specifically, the busbar receiving portion (positive electrode side busbar receiving portion 42) provided on one side of the insulating spacer wall 40 includes: an insulating spacer wall 40 protruding from the magnetic body receiving cylinder 36 (inner hole forming cylinder 50) to the other end (front end side) in the axial direction; and a positive electrode side support receiving portion 62, which is configured to include a pair of sidewall portions 60, 60 protruding upward from the left and right side edges of the insulating spacer wall 40. Each of these sidewall portions 60 is configured to extend continuously forward from the upper portions of the left wall portion 56 and the right wall portion 58 constituting the inner hole forming cylinder 50. That is, the positive electrode side support receiving portion 62 has a rectangular cross-section of the same size as the positive electrode side busbar receiving portion 42 within the inner hole 38, but the upper portion is not covered by the upper wall portion 52 and opens upward.

[0057] Furthermore, the positive electrode side busbar receiving portion 42 has an elastically engaged portion 64 that protrudes axially to one end (rear end side) within the magnetic body receiving cylinder portion 36 (inner hole forming cylinder portion 50). In Embodiment 1, a pair of elastically engaged portions 64, 64 are provided on both sides of the rear end portion of the inner hole forming cylinder portion 50 in the left-right direction. In particular, in Embodiment 1, the left elastically engaged portion 64 protrudes rearward from the rear end of the left wall portion 56, and the right elastically engaged portion 64 protrudes rearward from the right end portion of the upper wall portion 52 at the portion rearward of the flange plate portion 76 described later.

[0058] Each of these elastically engaged portions 64 is capable of elastic deformation in the thickness direction. The left elastically engaged portion 64 is capable of elastic deformation in the left-right direction, and the right elastically engaged portion 64 is capable of elastic deformation in the up-down direction. Furthermore, a locking claw 66 protruding inward (to the right) in the left-right direction is provided at the protruding end (rear end) of the left elastically engaged portion 64, and a locking claw 66 protruding inward (to the down) in the up-down direction is provided at the protruding end (rear end) of the right elastically engaged portion 64. The front end faces of the left and right locking claws 66 are flat surfaces that extend in a direction orthogonal to the front-back direction, and the rear end faces of each locking claw 66 are inclined surfaces that gradually increase in size towards the front and to the right or down.

[0059] Furthermore, when the positive-side busbar 12 is inserted into the positive-side busbar receiving portion 42 (described later), these elastically engaged portions 64 allow the positive-side busbar 12 to be inserted from one axial end (rear end) to the other axial end (front end) of the positive-side busbar receiving portion 42 through flexural deformation (elastic deformation in Embodiment 1). Additionally, as these elastically deformed elastically engaged portions 64 elastically recover, the engaging claws 66 of each elastically engaged portion 64 engage with the engaging portion (positive-side engaging portion 24) provided on the positive-side busbar 12, thereby preventing axial displacement of the positive-side busbar 12. In Embodiment 1, the engaging claws 66 of the left-side elastically engaged portion 64 engage with the left end of the curved portion 22 that bends upwards at the rear of the positive-side busbar 12, forming the positive-side engaging portion 24 at the left end of the curved portion 22.

[0060] Similarly, the busbar receiving portion (negative-side busbar receiving portion 44) provided on the other side of the insulating spacer 40 includes: an insulating spacer 40 protruding axially from the magnetic body receiving cylinder portion 36 (inner hole forming cylinder portion 50) to one end (rear end side); and a negative-side support receiving portion 68 serving as a support receiving portion, configured to include a pair of sidewall portions 60, 60 protruding downward from the left and right side edges of the insulating spacer 40. Each of these sidewall portions 60 is formed by continuously extending rearward from the lower portions of the left wall portion 56 and the right wall portion 58 constituting the inner hole forming cylinder portion 50. That is, the negative-side support receiving portion 68 has a rectangular cross-section of the same size as the negative-side busbar receiving portion 44 inside the inner hole 38, but the lower portion is not covered by the lower wall portion 54 and opens downward.

[0061] Furthermore, the negative electrode side busbar receiving portion 44 has an elastically engaged portion 70 that protrudes axially to the other end (front end) of the magnetic body receiving cylinder portion 36 (inner hole forming cylinder portion 50). In Embodiment 1, a pair of elastically engaged portions 70, 70 are provided on both sides of the front end portion of the inner hole forming cylinder portion 50 in the left-right direction. In particular, in Embodiment 1, each elastically engaged portion 70 is provided to protrude forward from the front end portion of the left wall portion 56 and the right wall portion 58. Each of these elastically engaged portions 70 can elastically deform in the thickness direction (left-right direction). Moreover, a locking claw 72 protruding inward in the left-right direction is provided at the protruding end (front end portion) of each elastically engaged portion 70. The rear end faces of the left and right locking claws 72, 72 are flat surfaces that extend in a direction orthogonal to the front-rear direction, and the front end faces of each locking claw 72, 72 are inclined surfaces whose protrusion size gradually increases towards the rear and inward in the left-right direction.

[0062] Furthermore, when the negative-side busbar 14 is inserted into the negative-side busbar receiving portion 44 (described later), these elastically engaged portions 70 allow the negative-side busbar 14 to be inserted from the other axial end (front end) to the axial end (rear end) of the negative-side busbar receiving portion 44 through flexural deformation (elastic deformation in Embodiment 1). Additionally, as these elastically deformed elastically engaged portions 70 elastically recover, the engaging claws 72 of each elastically engaged portion 70 engage with the engaging portion (negative-side engaging portion 26) provided on the negative-side busbar 14, thereby preventing axial displacement of the negative-side busbar 14.

[0063] Furthermore, a flange plate portion 76 is formed on one axial end side (rear end side) of the outer peripheral surface 74 (i.e., the outer surface of each of the wall portions 52, 54, 56, 58) of the inner hole forming cylinder portion 50, protruding outward and extending in a generally annular shape. In Embodiment 1, the flange plate portion 76 has a predetermined protrusion dimension outward and is formed continuously over a generally full circumference in the circumferential direction. The protrusion dimension outward of the flange plate portion 76 is not limited, for example, it is approximately equal to the radial width dimension of the ferrite core 16. Thus, when the ferrite core 16 is fitted onto the inner hole forming cylinder portion 50 as described later and the rear end face 30 of the ferrite core 16 abuts against the flange plate portion 76, as... Figure 4 , Figure 7 As shown, the outer peripheral surface 34 of the ferrite core 16 and the protruding end face of the flange plate portion 76 are located on the same curved surface that is formed into a generally elongated oval shape.

[0064] In particular, in Embodiment 1, a through hole 78 is formed in the portion of the flange plate portion 76 that protrudes upward from the upper wall portion 52 and extends through the plate thickness direction (front-back direction). This through hole 78 is located on the protruding base end side (inner circumferential side) of the flange plate portion 76, has a generally rectangular shape, and is formed in the central portion of the flange plate portion 76 and the upper wall portion 52 in the left-right direction. By forming the through hole 78 in the flange plate portion 76, when the ferrite core 16 and the cover portion 48 are fitted over the inner hole forming cylinder portion 50 (described later), air inside the ferrite core 16 and the cover portion 48 is discharged to the outside of the magnetic body fixing clamp 46 through the through hole 78.

[0065] Furthermore, an elastic locking portion 80 capable of flexing and deforming (elastic deformation in Embodiment 1) inward in a first orthogonal direction (vertical direction) is provided on the other axial end side (front end side) of the outer peripheral surface 74 of the inner hole forming cylindrical portion 50. In Embodiment 1, a pair of slits 82, 82 are provided separately in the left-right direction at the central portion of the front end of the upper wall portion 52, and each slit 82 extends rearward by a predetermined length dimension (front-rear direction dimension). An elastic locking portion 80 capable of elastic deformation in the vertical direction is formed between these slits 82 in the left-right direction, that is, the elastic locking portion 80 is provided protruding forward at the central portion of the front end of the upper wall portion 52 in the left-right direction.

[0066] Furthermore, a locking pawl 83 protruding upwards is formed at the protruding tip (front end) of the elastic locking portion 80. It should be noted that the rear end face of the locking pawl 83 is a flat surface 84 extending in a direction orthogonal to the front-rear direction, and the front end face of the locking pawl 83 is an inclined surface 85 whose protrusion gradually increases upwards as it faces rearwards. That is, the flat surface 84 of the locking pawl 83 and the upper portion of the flange plate portion 76 are positioned opposite each other at a predetermined distance in the front-rear direction. The relative distance A in the front-rear direction between the flat surface 84 and the front end face of the flange plate portion 76 (refer to...) Figure 4 The front-to-back dimension is larger than that of the ferrite core 16. Additionally, the front-to-back separation distance B between the flat surface 84 and the rear end face of the flange plate portion 76 (refer to...) Figure 4 It is slightly larger than the front-to-back dimension of the cover section 48.

[0067] <Cover section 48>

[0068] The cover portion 48 is a component formed independently of the magnetic body fixing clamp 46, covering the outer peripheral surface 34 and the end face (front end face 32) of the ferrite core 16, which is fitted onto the inner hole forming cylinder portion 50. Specifically, the cover portion 48 is generally an elongated cylindrical shape extending in the front-rear direction. The cover portion 48 includes: a peripheral wall portion 86, which extends continuously in the circumferential direction and has an elongated cross-section; and a generally annular front wall portion 88, which protrudes radially inward (inner peripheral side) from the front end of the peripheral wall portion 86. The inner diameter of the inner peripheral surface 89 of the peripheral wall portion 86 is slightly larger than the outer diameter of the ferrite core 16 and the outward protrusion of the flange plate portion 76. Furthermore, a central hole 90 is formed through the central portion of the front wall portion 88 in the thickness direction (front-rear direction), through which the inner hole forming cylinder portion 50 of the magnetic body fixing clamp 46 is inserted.

[0069] Therefore, when the sleeve portion 48 is assembled onto the magnetic body fixing clamp 46 on which the ferrite core 16 is fitted, the outer peripheral surface 34 of the ferrite core 16 is covered from the outer peripheral side by the peripheral wall portion 86 of the sleeve portion 48, and the front end surface 32 of the ferrite core 16 is covered from the front by the front wall portion 88 of the sleeve portion 48. In Embodiment 1, when the sleeve portion 48 is assembled onto the magnetic body fixing clamp 46 on which the ferrite core 16 is fitted, the rear end surface 30 of the ferrite core 16 abuts against the flange plate portion 76 (the ferrite core 16 is located at the assembly end position E), and the peripheral wall portion 86 of the sleeve portion 48 not only covers the ferrite core 16, but also covers the flange plate portion 76 from the outer peripheral side. In particular, in Embodiment 1, as Figure 4 As shown, the inner circumferential surface 89 of one axial end (rear end side) of the cover portion 48 is close to the protruding end face of the flange plate portion 76, and they are radially opposed with a small gap between them. It should be noted that the inner circumferential surface 89 of the rear end side of the cover portion 48 and the protruding end face of the flange plate portion 76 may also overlap each other.

[0070] In summary, the busbar assembly 10 with magnetic material in Embodiment 1 is generally a double-cylinder shape extending in the front-rear direction. The area between the cover portion 48 of the outer circumferential cylindrical body and the inner hole forming cylindrical portion 50 (magnetic material fixing clamp 46) of the inner circumferential cylindrical body is an annular magnetic material receiving cylindrical portion 36, which houses the ferrite core 16. Furthermore, the inner hole 38 of the magnetic material receiving cylindrical portion 36 is formed by the hole portion of the inner hole forming cylindrical portion 50, which extends axially through the inner circumferential cylindrical body. An insulating spacer 40 is disposed within the inner hole 38 to form the positive and negative busbar receiving portions 42 and 44. Therefore, the inner circumferential surface of the ferrite core 16 is covered by the inner hole forming cylindrical portion 50, and the outer circumferential surface 34 of the ferrite core 16 is covered by the peripheral wall portion 86 of the cover portion 48. Furthermore, the rear end face 30 of the ferrite core 16 is covered by the flange plate portion 76, and the front end face 32 of the ferrite core 16 is covered by the front wall portion 88 of the cover portion 48. Thus, in Embodiment 1, the ferrite core 16 is covered by the inner hole forming cylinder portion 50, flange plate portion 76, and cover portion 48 throughout the entire circumference.

[0071] The inward circumferential protrusion of the front wall portion 88 is not limited, but is, for example, approximately equal to the radial width of the ferrite core 16. Therefore, when the sleeve portion 48 is fitted over the ferrite core 16 and assembled into the magnetic body fixing clamp 46 as described later, as... Figure 4 As shown, the inner peripheral surface of the ferrite core 16 and the inner peripheral end face of the front wall portion 88 are located on the same surface with a generally rectangular shape, and the ferrite core 16 is sleeved on the inner hole to form a cylindrical portion 50.

[0072] It should be noted that, in Embodiment 1, an abutment rib 92 is provided on the inner circumferential surface 89 of the peripheral wall portion 86 of the cover portion 48. This abutment rib 92 protrudes inward and extends from the front end in the front-rear direction by a predetermined front-rear dimension. In particular, in Embodiment 1, a plurality of abutment ribs 92 are provided on the inner circumferential surface 89 of the peripheral wall portion 86, and each abutment rib 92 is arranged separately from each other in the circumferential direction. Thus, when the cover portion 48 is fitted onto the ferrite core 16, the protruding tip (inner circumferential end) of each abutment rib 92 abuts against the outer circumferential surface 34 of the ferrite core 16. That is, when the cover portion 48 is fitted onto the ferrite core 16 and assembled into the magnetic body fixing clamp 46, the protruding tip (inner circumferential end) of each abutment rib 92 slides in contact with the outer circumferential surface 34 of the ferrite core 16, and the cover portion 48 can be displaced axially (front-rear direction) relative to the magnetic body fixing clamp 46. This can suppress the shaking of the cover section 48 relative to the ferrite core 16.

[0073] Alternatively, a plurality of abutment ribs 94 may be provided on the outer peripheral surface of the peripheral wall portion 86 of the cover portion 48. The plurality of abutment ribs 94 protrude outward and extend in the vertical direction. For example, when the busbar assembly 10 with a magnetic body is installed in a vehicle (not shown), each abutment rib 94 abuts against the installed component.

[0074] Assembly Method of Magnetic Busbar Assembly 10

[0075] The following describes a specific example of the assembly method for the busbar assembly 10 with magnetic material. It should be noted that the manufacturing method of the busbar assembly 10 with magnetic material is not limited to the method described below.

[0076] First, bring the ferrite core 16 close from the rear. Figure 6 The magnetic clamp 46 shown is inserted into the internal space 27 of the ferrite core 16 by means of its front portion. The upper portion of the inner periphery of the ferrite core 16 abuts against the inclined surface 85 of the locking claw 83 of the elastic locking portion 80, which protrudes forward from the inner bore forming cylinder 50, causing the elastic locking portion 80 to elastically deform downwards, allowing further insertion of the magnetic clamp 46. The locking claw 83 of the elastic locking portion 80 passes through the internal space 27 of the ferrite core 16, causing the elastic locking portion 80 to elastically recover its deformation and return to its initial shape. The insertion of the magnetic clamp 46 into the internal space 27 of the ferrite core 16, i.e., the rearward displacement of the ferrite core 16 relative to the magnetic clamp 46, is limited by the abutment between the rear end face 30 of the ferrite core 16 and the flange plate portion 76. Figure 7 As shown, with the rear end face 30 of the ferrite core 16 abutting against the flange plate portion 76 (the ferrite core 16 is located at the assembly end position E), the ferrite core 16 is fitted into the inner hole of the magnetic body fixing clamp 46 to form a cylindrical portion 50. In this state, the front end face 32 of the ferrite core 16 abuts against the flat surface 84 of the locking claw 83, thereby preventing the ferrite core 16 from falling off the magnetic body fixing clamp 46.

[0077] After that, from Figure 7In the state shown (the state where the ferrite core 16 is located at the assembly end position E), the cover portion 48 approaches from the rear, and the front portion of the magnetic body retaining clamp 46 is inserted into the central hole 90 of the cover portion 48. The upper portion of the cover portion 48 abuts against the inclined surface 85 of the locking claw 83 of the elastic locking portion 80, causing the elastic locking portion 80 to elastically deform downwards, allowing further insertion of the magnetic body retaining clamp 46. The locking claw 83 of the elastic locking portion 80 passes through the central hole 90, causing the elastic locking portion 80 to elastically recover its deformation and return to its initial shape. The insertion of the magnetic body retaining clamp 46 into the central hole 90, i.e., the rearward displacement of the cover portion 48 relative to the magnetic body retaining clamp 46, is limited, for example, by the contact between the front wall portion 88 of the cover portion 48 and the front end face 32 of the ferrite core 16. Therefore, in Embodiment 1, the sleeve portion 48 that is fitted over the ferrite core 16 can be assembled from the other axial end side (front end side) of the inner hole forming sleeve portion 50 toward the axial end side (rear end side) by the elastic deformation of the elastic locking portion 80.

[0078] like Figure 8 As shown, with the rearward displacement of the cover portion 48 completed, the outer peripheral surface 34 and the front end surface 32 of the ferrite core 16 are covered by the cover portion 48. Specifically, in Figure 8 In the shown state, not only the ferrite core 16 but also the flange plate portion 76 is covered by the cover portion 48, and the inner peripheral surface 89 of the rear opening of the peripheral wall portion 86 is radially close to and opposite the protruding end face of the flange plate portion 76. Furthermore, in this state, the cover portion 48 is prevented from detaching from the magnetic body fixing clamp 46 by the contact between the front wall portion 88 of the cover portion 48 and the flat surface 84 of the locking claw 83. That is, the ferrite core 16 and the cover portion 48 are elastically restored to their initial shape by the elastic locking portion 80, thereby being positioned and held axially between the locking claw 83 of the elastic locking portion 80 and the flange plate portion 76. Thus, by assembling the cover portion 48 into the magnetic body fixing clamp 46, an insulation holding member 18 is constructed.

[0079] Then, from Figure 8 From the state shown, as Figure 9 As shown, the positive-side busbar 12 is inserted from the rear relative to the positive-side busbar receiving portion 42 of the insulation holding member 18. That is, the positive-side busbar 12 is inserted from above into the positive-side busbar receiving portion 42. Figure 8The rear portion of the insulating spacer 40 overlaps, causing the positive-side busbar 12 to slide forward. By pressing the positive-side busbar 12 forward, the elastically engaged portions 64, 64 on the left and right sides of the rear end of the positive-side busbar receiving portion 42 elastically deform to the left and upward, respectively, allowing further insertion of the positive-side busbar 12. Furthermore, the front portion of the positive-side busbar 12 is supported by the positive-side support receiving portion 62, and at the point when each elastically engaged portion 64 reaches each positive-side engaged portion 24, each elastically engaged portion 64 elastically recovers and engages with each positive-side engaged portion 24. This prevents axial displacement of the positive-side busbar 12 relative to the insulating retaining member 18.

[0080] Similarly, from Figure 8 From the state shown, as Figure 1 As shown, the negative-side busbar 14 is inserted from the front relative to the negative-side busbar receiving portion 44 of the insulation retaining member 18. That is, the negative-side busbar 14 overlaps with the front portion of the insulation spacer 40 from below, and the negative-side busbar 14 slides rearward. By pressing the negative-side busbar 14 rearward, the elastic engaging portions 70, 70 on the left and right sides of the front end of the negative-side busbar receiving portion 44 elastically deform outward in the left and right directions, allowing further insertion of the negative-side busbar 14. Furthermore, the rear portion of the negative-side busbar 14 is supported by the negative-side support receiving portion 68, and at the point when each elastic engaging portion 70 reaches each negative-side engaging portion 26, each elastic engaging portion 70 elastically recovers and engages with each negative-side engaging portion 26. This prevents the negative-side busbar 14 from displacing axially relative to the insulation retaining member 18. As a result, the busbar assembly 10 with a magnetic body in Embodiment 1 is completed.

[0081] In this type of magnetic busbar assembly 10, the ends (e.g., the rear ends) of the busbars 12 and 14 on the positive and negative sides along their length (front-rear direction) are electrically connected to a motor (not shown), and the ends (e.g., the front ends) on the other side along their length are electrically connected to a PCU (not shown). Furthermore, this magnetic busbar assembly 10 is fixed to an electrical connection box or similar fixture mounted in the vehicle. The aforementioned electrical connections and vehicle fixation are achieved, for example, by inserting bolts (not shown) into the bolt insertion holes 20. As a result, the noise generated during power transmission between multiple vehicle components connected by the magnetic busbar assembly 10 (e.g., between the motor and the PCU) can be suppressed by the ferrite core 16.

[0082] According to Embodiment 1, the busbar assembly 10 with a magnetic body has positive and negative side busbar receiving portions 42 and 44 that house the positive and negative side busbars 12 and 14, respectively, which are arranged with an insulating spacer 40 in between. This avoids the positive side busbar 12 and the negative side busbar 14 from coming into contact with each other and causing an electrical short circuit in the power supply path between vehicle components.

[0083] In particular, each busbar housing 42, 44 is a transversely elongated shape with a width dimension larger than its height dimension, and these transversely elongated busbar housings 42, 44 are stacked in a first orthogonal direction (vertical direction) that is the height direction. As a result, the space required to constitute each busbar housing 42, 44 can be reduced, especially in the width direction (horizontal direction). Consequently, miniaturization is achieved in the ferrite core 16 that is fitted over each busbar 12, 14, and thus in the busbar assembly 10 with magnetic material.

[0084] The magnetic clamp 46 includes an inner bore forming cylinder 50 forming each busbar receiving portion 42, 44, a flange plate 76, and an elastic locking portion 80. When the ferrite core 16 is fitted onto the inner bore forming cylinder 50, the elastic locking portion 80 elastically deforms downwards by fitting the ferrite core 16 onto the magnetic clamp 46 from the front. The elastic locking portion 80 then elastically returns to its original position through the internal space of the ferrite core 16, and the ferrite core 16 is locked in place by the locking claw 83. It should be noted that the ferrite core 16 reaches the assembly end position E by abutting against the flange plate 76. The ferrite core 16 at the assembly end position E is covered by a cover cylinder 48. The cover cylinder 48's fit over the ferrite core 16 is achieved using the elastic locking portion 80, similar to the ferrite core 16 described above. In this way, the ferrite core 16 and the cover section 48 can be easily assembled by using the elastic locking part 80.

[0085] In particular, with the shroud portion 48 fitted over the ferrite core 16, the inner peripheral surface 89 of the rear opening of the shroud portion 48 covers the protruding end face of the flange plate portion 76 from the outer peripheral side. In Embodiment 1, the inner peripheral surface 89 of the rear opening of the shroud portion 48 and the protruding end face of the flange plate portion 76 are close to each other. This ensures a relatively large creepage distance between the ferrite core 16 disposed inside the shroud portion 48 and the busbar (e.g., the positive side busbar 12) disposed outside the shroud portion 48, thus ensuring insulation between the ferrite core 16 and the positive side busbar 12. As a result, without increasing the separation distance between the ferrite core 16 and the positive side busbar 12, further miniaturization of the magnetic busbar assembly 10 can be achieved.

[0086] The positive-side busbar receiving portion 42 includes: a positive-side support receiving portion 62, configured to include an insulating spacer 40 and each side wall portion 60; and each elastically engaged portion 64, preventing displacement of the positive-side busbar 12 in the axial (front-rear direction). This allows the positive-side busbar 12 inserted into the positive-side busbar receiving portion 42 to be stably held. Similarly, the negative-side busbar receiving portion 44 includes: a negative-side support receiving portion 68, configured to include an insulating spacer 40 and each side wall portion 60; and each elastically engaged portion 70, preventing displacement of the negative-side busbar 14 in the axial (front-rear direction). This allows the negative-side busbar 14 inserted into the negative-side busbar receiving portion 44 to be stably held.

[0087] <Other Implementation Methods>

[0088] The above detailed description of Embodiment 1 is provided as a specific example of this disclosure, but this disclosure is not limited to this specific description. Modifications and improvements within the scope of achieving the purpose of this disclosure are included in this disclosure. For example, the following modifications of the embodiment are also included within the technical scope of this disclosure.

[0089] (1) In the above embodiment, a ferrite core 16 is exemplified as the annular magnetic body surrounding each busbar 12, 14, but it is not limited to this. The annular magnetic body can be, for example, a known annular magnetic body made of nanocrystalline soft magnetic material. It should be noted that the magnetic body does not need to be strictly annular, as long as the whole is annular. For example, the annular magnetic body can be a roughly C-shaped cross-section with a slit in a part of the circumferential direction, or it can be formed into an annular magnetic body by overlapping a pair of magnetic bodies formed into an open cylindrical shape.

[0090] (2) In the above embodiment, each busbar receiving portion 42, 44 is stacked in the first orthogonal direction (vertical direction), but a pair of busbar receiving portions may also be stacked in the second orthogonal direction (left-right direction). As in the above embodiment, each busbar receiving portion 42, 44 is stacked in the vertical direction, thereby achieving miniaturization in the left-right direction in the busbar assembly 10 with magnetic material. However, by stacking each busbar receiving portion in the left-right direction, miniaturization in the vertical direction is achieved in the busbar assembly with magnetic material.

[0091] (3) In the above embodiment, the rearward displacement of the cover portion 48 that is fitted over the ferrite core 16 is limited, for example, by the front wall portion 88 of the cover portion 48 abutting against the front end face 32 of the ferrite core 16. In the assembled state of the cover portion 48, the peripheral wall portion 86 of the cover portion 48 covers the flange plate portion 76 from the outer peripheral side, but it is not limited to this method. For example, the protrusion dimension of the flange plate portion to the outer peripheral side may be increased compared with the above embodiment, and the rearward displacement of the cover portion may be limited by the rear end face of the cover portion abutting against the flange plate portion.

[0092] (4) The specific shape of the pair of busbars (positive and negative side busbars 12 and 14) is not limited. In the above embodiment, a curved portion 22 that bends upward is provided at the rear of the positive side busbar 12. The curved portion 22 forms a positive side engaging portion 24 that engages with the elastic engaging portion 64. However, the positive side busbar may extend straight, or a positive side engaging portion with an opening to the left may be provided, which engages with the elastic engaging portion on the left. In addition, in the above embodiment, each busbar 12 and 14 is formed by overlapping two busbars of approximately the same shape. However, this is not a limitation. Each busbar may be formed by one busbar or by three or more busbars. Furthermore, in the above embodiment, each busbar 12 and 14 is inserted into each other from opposite directions relative to each busbar receiving portion 42 and 44. However, depending on the shape of each busbar, each busbar may be inserted into each other from the same direction relative to each busbar receiving portion.

[0093] Label Explanation

[0094] 10. Busbar assembly with magnetic material

[0095] 12. Positive side busbar (busbar)

[0096] 14. Negative side busbar (busbar)

[0097] 16 Ferrite cores (magnetic materials)

[0098] 18 Insulation retention components

[0099] 20 Bolt through holes

[0100] 22. Bending section

[0101] 24 Positive electrode side locking part (locking part)

[0102] 26 Negative electrode side locking part (locking part)

[0103] 27. Interior Space

[0104] 28 Zhou Bi

[0105] 30 Rear end face (the end face on one side of the axial direction)

[0106] 32. Front end face (the end face on the other side of the axial direction)

[0107] 34 Outer Peripheral Surface

[0108] 36. Magnetic Body Receiving Cylinder Section

[0109] 38 inner hole

[0110] 40 Insulating spacer

[0111] 42 Positive side busbar housing (busbar housing located on one side of the insulating partition wall)

[0112] 44 Negative side busbar housing (busbar housing located on the other side of the insulating partition wall)

[0113] 46 Magnetic Body Fixture

[0114] 48. Cover section

[0115] 50. Inner bore forms cylindrical section.

[0116] 52 Upper wall

[0117] 54 Lower wall portion

[0118] 56 left wall

[0119] 58 right wall

[0120] 60 Side wall portion

[0121] 62 Positive electrode side support and housing section (support and housing section)

[0122] 64. Elastic locking part

[0123] 66 Claws

[0124] 68 Negative electrode side support housing (support housing)

[0125] 70 Elastic locking part

[0126] 72 Claws

[0127] 74 Outer Peripheral Surface

[0128] 76 Flange plate portion

[0129] 78 Through Holes

[0130] 80 Elastic locking part

[0131] 82 Slits

[0132] 83 Locking claw

[0133] 84 Flat surface

[0134] 85 Inclined Surface

[0135] 86. Perimeter of the wall

[0136] 88 Anterior wall portion

[0137] 89 Inner circumferential surface

[0138] 90 Central Hole

[0139] 92, 94 Abutment Ribs

[0140] E. Assembly end position.

Claims

1. A busbar assembly with a magnetic material, wherein, The magnetic busbar assembly comprises: A pair of busbars; A ring-shaped magnetic body is fitted over the pair of busbars; and An insulating retaining member holds the pair of busbars and the magnet in a non-contact state. The insulation retaining member has: an annular magnetic body receiving cylinder portion for receiving the magnetic body; and a pair of bus bar receiving portions disposed apart by an insulating spacer wall, and respectively receiving the pair of bus bars, wherein the insulating spacer wall passes through the inner hole of the magnetic body receiving cylinder portion and extends axially.

2. The busbar assembly with a magnetic material according to claim 1, wherein, The pair of busbar receiving portions are stacked in a first orthogonal direction orthogonal to the axial direction of the magnetic body receiving cylinder portion, separated by the insulating spacer wall. Each busbar receiving portion has a height dimension that is larger than the plate thickness dimension of each busbar and is in the same direction as the first orthogonal direction. Each busbar receiving portion has a width dimension that is larger than the plate width dimension of each busbar and larger than the height dimension in a second orthogonal direction orthogonal to the first orthogonal direction.

3. The busbar assembly with a magnetic material according to claim 1 or claim 2, wherein, The magnetic body receiving cylinder portion of the insulation retaining member includes: The inner hole forms a cylindrical portion, and the inner hole constituting the magnetic body receiving cylindrical portion extends in the axial direction with a flat rectangular frame cross-section in a first orthogonal direction orthogonal to the axial direction; The flange plate portion protrudes from the outer peripheral surface of one axial end side of the inner hole forming cylinder portion to the outer peripheral side; An elastic locking portion, formed on the outer peripheral surface at the other end of the inner bore forming cylinder, is capable of flexing and deforming inward in the first orthogonal direction; and The cover section covers the outer peripheral surface of the magnetic body, which is a rectangular frame shape that is fitted over the inner hole forming the cylindrical section, and the end face on the other end side of the axial direction. The sleeve portion fitted onto the magnetic body can be assembled from the other axial end of the inner bore forming sleeve portion toward the first axial end side by means of the flexural deformation of the elastic locking portion. At the assembly end position where the end face of the magnetic body on one axial end abuts the flange plate portion, the elastic locking portion elastically recovers, and the magnetic body and the cover portion are positioned and held in the axial direction between the elastic locking portion and the flange plate portion, and the magnetic body is covered throughout the circumference by the inner hole forming the cylinder portion, the flange plate portion and the cover portion.

4. The busbar assembly with a magnetic material according to claim 3, wherein, The inner circumferential surface of the axial end of the cover portion covers the protruding end face of the flange portion from the outer circumferential side.

5. The busbar assembly with a magnetic material according to claim 1 or claim 2, wherein, The busbar receiving portion disposed on one side of the insulating spacer has: a support receiving portion configured to include the insulating spacer protruding toward the other axial end of the magnetic body receiving cylinder and a pair of sidewall portions protruding from both side edges of the insulating spacer; and an elastically engaging portion protruding toward one axial end of the magnetic body receiving cylinder, which allows the busbar to be inserted from one axial end of the busbar receiving portion toward the other axial end by means of flexural deformation, and engages with the engaging portion disposed on the busbar by means of elastic recovery, thereby preventing displacement of the busbar in the axial direction.

6. The busbar assembly with a magnetic material according to claim 1 or claim 2, wherein, The busbar receiving portion disposed on the other side of the insulating spacer has: a support receiving portion, configured to include the insulating spacer protruding toward one axial end of the magnetic body receiving cylinder and a pair of sidewall portions protruding from both side edges of the insulating spacer; and an elastically engaging portion, protruding toward the other axial end of the magnetic body receiving cylinder, which allows the busbar to be inserted from the other axial end of the busbar receiving portion toward one axial end by means of flexural deformation, and engages with the engaging portion disposed on the busbar by means of elastic recovery, thereby preventing displacement of the busbar in the axial direction.

Images