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CN-122029949-A - Bus bar assembly with magnetic body

CN122029949ACN 122029949 ACN122029949 ACN 122029949ACN-122029949-A

Abstract

Disclosed is a bus bar assembly with a magnetic body, which can suppress contact between a pair of bus bars. A magnetic bus bar assembly (10) is provided with a pair of bus bars (12, 14), an annular magnetic body (16) which is externally fitted to the pair of bus bars (12, 14), and an insulating holding member (18) which holds the pair of bus bars (12, 14) and the magnetic body (16) in a mutually non-contact state, wherein the insulating holding member (18) has an annular magnetic body accommodating tube portion (36) which accommodates the magnetic body (16), and a pair of bus bar accommodating portions (42, 44) which are arranged with an insulating partition wall (40) interposed therebetween and which accommodates the pair of bus bars (12, 14), respectively, and the insulating partition wall (40) penetrates an inner hole (38) of the magnetic body accommodating tube portion (36) and extends in the axial direction.

Inventors

  • Nakanaka Shota
  • TAKEUCHI TAKAYUKI
  • Ban Qianchun

Assignees

  • 株式会社自动网络技术研究所
  • 住友电装株式会社
  • 住友电气工业株式会社

Dates

Publication Date
20260512
Application Date
20241030
Priority Date
20231101

Claims (6)

  1. 1. A bus bar assembly with magnetic body, wherein the bus bar assembly with magnetic body comprises: A pair of bus bars; A ring-shaped magnetic body sleeved on the pair of bus bars, and An insulating holding member for holding the pair of bus bars and the magnetic body in a state of non-contact with each other, The insulating holding member includes an annular magnetic body housing tube portion housing the magnetic body, and a pair of bus bar housing portions disposed with insulating partition walls interposed therebetween and housing the pair of bus bars, respectively, the insulating partition walls penetrating an inner hole of the magnetic body housing tube portion and extending in an axial direction.
  2. 2. The magnetic body-equipped bus bar assembly according to claim 1, wherein, The pair of bus bar housing portions are stacked in a first orthogonal direction orthogonal to the axial direction of the magnetic body housing tube portion via the insulating partition wall, each of the bus bar housing portions has a height dimension larger than a plate thickness dimension of each of the bus bars and in the same direction as the first orthogonal direction, and each of the bus bar housing portions has a width dimension larger than a plate width dimension of each of the bus bars and larger than the height dimension in a second orthogonal direction orthogonal to the first orthogonal direction.
  3. 3. The bus bar assembly with magnetic body according to claim 1 or claim 2, wherein, The magnetic body housing tube portion of the insulating holding member includes: an inner hole forming tube portion that constitutes the inner hole of the magnetic body housing tube portion, extending in the axial direction in a rectangular frame section flat in a first orthogonal direction orthogonal to the axial direction; A flange plate portion protruding from an outer peripheral surface of the inner hole forming cylinder portion on one axial end side toward an outer peripheral side; an elastic locking part formed on the outer peripheral surface of the other end side of the inner hole forming cylinder part in the axial direction and capable of flexing and deforming inward in the first orthogonal direction, and A cover tube part covering the outer peripheral surface of the magnetic body and the end surface on the other end side in the axial direction, the outer peripheral surface being in the shape of a rectangular frame which is sleeved outside the inner hole forming tube part, The cover tube portion that is externally fitted to the magnetic body can be assembled from the other end side in the axial direction of the inner hole forming tube portion toward the one end side in the axial direction by flexural deformation of the elastic locking portion, The elastic locking portion is elastically restored at an assembly end position where an end face of the magnetic body on the axial one end side is in contact with the flange plate portion, the magnetic body and the cap cylinder 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 over the entire circumference by the inner hole forming cylinder portion, the flange plate portion, and the cap cylinder portion.
  4. 4. The bus bar assembly with magnetic body according to claim 3, wherein, An inner peripheral surface of the cap tube portion on the one axial end side covers a protruding end surface of the flange plate portion from an outer peripheral side.
  5. 5. The bus bar assembly with magnetic body according to claim 1 or claim 2, wherein, The bus bar housing portion provided on one side of the insulating partition wall includes a support housing portion configured to include the insulating partition wall protruding toward the other axial end side of the magnetic body housing tube portion and a pair of side wall portions protruding from both side edge portions of the insulating partition wall, and an elastic engaged portion protruding toward the one axial end side of the magnetic body housing tube portion, and to allow insertion of the bus bar from the one axial end side to the other axial end side of the bus bar housing portion by flexural deformation, and to engage with an engagement portion provided on the bus bar by elastic recovery, thereby preventing displacement of the bus bar in the axial direction.
  6. 6. The bus bar assembly with magnetic body according to claim 1 or claim 2, wherein, The bus bar housing portion provided on the other side of the insulating partition wall has a support housing portion configured to include the insulating partition wall protruding toward the one axial end side of the magnetic body housing tube portion and a pair of side wall portions protruding from both side edge portions of the insulating partition wall, and an elastic engaged portion protruding toward the other axial end side of the magnetic body housing tube portion, and to allow insertion of the bus bar from the other axial end side of the bus bar housing portion toward the one axial end side by flexural deformation, to engage with an engagement portion provided on the bus bar by elastic recovery, thereby preventing displacement of the bus bar in the axial direction.

Description

Bus bar assembly with magnetic body Technical Field The present disclosure relates to a busbar assembly with a magnetic body. Background In a vehicle such as an electric vehicle or a hybrid vehicle that runs by being driven by a motor, a bus bar through which a large current flows is arranged. In patent document 1, in order to remove noise from such a bus bar, a bus bar assembly with a magnetic body is proposed in which a ring-shaped magnetic body such as a ferrite core is externally attached to the bus bar. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2019-186406 Disclosure of Invention Problems to be solved by the invention However, in the bus bar assembly disclosed in patent document 1, a pair of bus bars constituting a through circuit are inserted and arranged in a single inner hole of an annular core housing portion housing a ferrite core in a parallel state with a gap therebetween. Therefore, the bus bars are separated from each other only by a space, and therefore there is a possibility that a pair of bus bars contact each other due to vibration, unexpected impact, or the like at the time of mounting the vehicle. Accordingly, a bus bar assembly with a magnetic body capable of suppressing contact between a pair of bus bars is disclosed. Means for solving the problems The disclosed bus bar assembly with magnetic body is provided with a pair of bus bars, an annular magnetic body which is sheathed on the pair of bus bars, and an insulating holding member which holds the pair of bus bars and the magnetic body in a mutually non-contact state, wherein the insulating holding member is provided with an annular magnetic body accommodating cylinder part which accommodates the magnetic body, and a pair of bus bar accommodating parts which are arranged with insulating partition walls therebetween and respectively accommodate the pair of bus bars, and the insulating partition walls penetrate through inner holes of the magnetic body accommodating cylinder part and extend in the axial direction. Effects of the invention According to the bus bar assembly with a magnetic body of the present disclosure, contact between a pair of bus bars can be suppressed. Drawings Fig. 1 is a perspective view showing a busbar assembly with a magnetic body according to embodiment 1. Fig. 2 is a plan view of the magnetic-body-equipped busbar assembly shown in fig. 1. Fig. 3 is a bottom view of the magnetic-body-equipped busbar assembly shown in fig. 1. Fig. 4 is a sectional view of IV-IV in fig. 2. Fig. 5 is a longitudinal sectional view showing the V-V section in fig. 2 in an enlarged manner. Fig. 6 is a perspective view showing a magnetic body fixing jig constituting an insulating holding member of the busbar assembly with magnetic body shown in fig. 1. Fig. 7 is a perspective view showing a state in which a magnetic material is fixed to the magnetic material fixing jig shown in fig. 6. Fig. 8 is a perspective view showing a state in which the magnetic material shown in fig. 7 is externally coated on the cover tube portion and the magnetic material is accommodated in the insulating holding member. Fig. 9 is a perspective view showing a state in which one of the pair of bus bars is assembled to the insulating holding member shown in fig. 8. Detailed Description < Description of embodiments of the present disclosure > First, embodiments of the present disclosure will be described. In the bus bar assembly with a magnetic body of the present disclosure, (1) Comprises a pair of bus bars, a ring-shaped magnetic body sleeved on the bus bars, and The insulating holding member holds the pair of bus bars and the magnetic body in a state of being non-contact with each other, and includes an annular magnetic body accommodating tube portion accommodating the magnetic body, and a pair of bus bar accommodating portions arranged with insulating partition walls penetrating through inner holes of the magnetic body accommodating tube portion and extending in an axial direction, and accommodating the pair of bus bars, respectively. According to the bus bar assembly with a magnetic body of the present embodiment, the pair of bus bars and the magnetic body constituting the through circuit are held in a state of being non-contact with each other by the insulating holding member. Further, the insulating holding member is provided with a pair of bus bar receiving portions, each of which receives each of the bus bars, through an insulating partition wall that extends in the axial direction and penetrates an inner hole of the magnetic body receiving cylinder portion. Therefore, as compared with the conventional structure in which the pair of bus bars inserted through the inner hole are separated by only the space, the risk of the pair of bus bars coming into contact with each other can be suppressed or avoided. As the annular magnetic material, a known annular magnetic material such as a ferrite core or a na