Shield bracket

Abstract

To provide a shield bracket having a simple structure and capable of being manufactured inexpensively by simple processing.SOLUTION: A shield bracket 4 comprises: a main body portion 5 being cylindrical and having a weld portion 6 extending in a longitudinal direction; and a vehicle body attachment portion 7 formed in one end portion of the main body portion 5, being in a flat plate shape, and having a vehicle body fastening hole 8. The shield bracket 4 connected to a braided wire 10 of a shield wire 3 is fixed to a vehicle body by setting up a fixing tool such as a bolt (not shown) in the vehicle body fastening hole 8. The shield bracket may be fixed to a member connected to a vehicle body ground other than the vehicle body. For example, it can also be connected to a housing ground of a unit or the like such as a battery pack housing or a PCU, using the fastening hole of the shield bracket attachment portion.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a shield bracket. [Background Art]

[0002] Conventionally, in high-voltage wire circuits used in electric vehicles, a shielded wire in which the electric wire is surrounded by a braided wire serving as a shield member is sometimes used for noise countermeasures. In this case, the braided wire is connected to a metal layer via a connecting member such as a shield shell to ground the shield.

[0003] Patent Document 1 discloses a method for fixing a shielded wire to a connecting member, in which a core wire and an insulating coating of the shielded wire are passed through a shield shell having a seamless main body portion and a small-diameter portion, the small-diameter portion is covered with an end of the braided wire and crimped by a shield ring, and an inner holder through which the core wire and the insulating coating pass is fixed inside the main body portion of the shield shell. [Prior Art Literature] [Patent Literature]

[0004] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2010-268562 [Summary of the Invention] [Problem to be Solved by the Invention]

[0005] However, the above-described shield shell has a structure that secures a mounting portion for grounding while holding the inner holder at the same time, so the shape is complicated. Manufacturing a shield shell with a complex tubular shape from a metal member requires press equipment for drawing, and the manufacturing process is also complicated. In addition, when forming into a tubular shape, the shielding performance at the seam may become uncertain. Furthermore, the inner holder for protecting the internal electric wires is expensive because it uses a dedicated resin part.

[0006] This invention has been made in view of the aforementioned problems, and its objective is to provide a shield bracket that has a simple structure and can be manufactured inexpensively with simple processing. [Means for solving the problem]

[0007] To achieve the aforementioned objectives, the present invention comprises a main body portion which is cylindrical and has a welded portion extending along its longitudinal direction, and a vehicle body mounting portion which is formed at one end of the main body portion, is flat in shape, and has a vehicle body fastening hole. Furthermore, it comprises a wire retaining portion connected to the vehicle body mounting portion, and the wire retaining portion and the vehicle body mounting portion are capable of holding the wire that passes through the main body portion from the outside of the wire protection material arranged on the outer circumference of the wire. This shield bracket is characterized by the following features.

[0008] The main body is further provided with a fixing portion formed at the other end, which is cylindrical and has a welded portion extending along the longitudinal direction, wherein the outer surface of the fixing portion is located inward from the outer surface of the main body when viewed from the longitudinal direction, and it is desirable that a braided wire, which is arranged on the outer circumference of the electric wire passed through the fixing portion, can be fixed to the outer surface of the fixing portion with a metal member.

[0009] It is preferable that the aforementioned welded joint be formed by laser processing.

[0010] before The wire retaining portion may be formed integrally with the vehicle body mounting portion, or it may be formed separately from the vehicle body mounting portion and connected to the vehicle body mounting portion using the vehicle body fastening hole.

[0011] According to the shield bracket of the present invention, the main body is joined in a cylindrical shape by welding, and the main body and the vehicle body mounting portion are integrally formed from a single metal plate. Therefore, the structure is simple, it can be easily manufactured by pressing, etc., and can be manufactured inexpensively with simple processing.

[0012] Furthermore, if the fixing portion formed at the end of the main body is joined to the main body by welding in the same way, the fixing portion and the main body can be manufactured as a single unit from a single metal plate with simple processing. If the outer surface of the fixing portion is located inward from the outer surface of the main body when viewed from the longitudinal direction, the metal band will not protrude significantly outward from the main body when the braided wire is fixed to the fixing portion with a metal member.

[0013] By using laser processing for the welded parts, the main body and fixing parts can be reliably formed into a tubular shape, ensuring shielding performance.

[0014] Furthermore, by protecting the wires with existing general-purpose wire protection materials and allowing the wires to be held from the outside of the wire protection material at the vehicle mounting part and the wire retaining part, the wire fixing structure can be simplified. In addition, compared to using a dedicated inner holder for wire protection, costs can be reduced, and the work of positioning and temporarily holding the inner holder is eliminated. [Effects of the Invention]

[0015] According to the present invention, a shield bracket can be provided that has a simple structure and can be manufactured inexpensively with simple processing. [Brief explanation of the drawing]

[0016] [Figure 1] A diagram showing vehicle body 1. [Figure 2] Perspective view of shield bracket 4. [Figure 3] (a) is a side view of the shield bracket 4, and (b) is a top view of the shield bracket 4. [Figure 4] (a) is a cross-sectional view along line AA shown in Figure 3(b), and (b) is a cross-sectional view along line BB shown in Figure 3(b). [Figure 5] (a) is a side view of the shield bracket 4a, and (b) is a top view of the shield bracket 4a. [Figure 6] Figure 5 shows the shield bracket 4a viewed from the left side. [Figure 7](a) is a side view of the shield bracket 4b, and (b) is a view of the shield bracket 4b seen from the left side of (a). [Figure 8] Figure showing the shield bracket 4c. Mode for Carrying Out the Invention

[0017] First Embodiment Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. Figure 1 is a diagram showing a vehicle body 1 in which the shield bracket 4 of the first embodiment is used. Figures 2 to 4 are diagrams showing the shield bracket 4 connected to a shielded electric wire 3.

[0018] In the example shown in Figure 1, various devices in the vehicle body 1 are connected to each other by the shielded electric wires 3. The shielded electric wire 3 is formed by covering an electric wire 12 with a braided wire 10 as shown in Figures 2 to 4. The shield bracket 4 is used for connecting the braided wire 10 of the shielded electric wire 3 to the metal housing 2 having shielding properties (see Figure 1) to achieve grounding.

[0019] As shown in Figures 2 to 4, the shield bracket 4 comprises a main body portion 5, a vehicle body attachment portion 7, a fixing portion 9, and the like. The main body portion 5 is cylindrical and has a welded portion 6 extending along the longitudinal direction. The vehicle body attachment portion 7 has a flat plate shape, and is formed at one longitudinal end of the main body portion 5 so as to protrude in the longitudinal direction of the main body portion 5 and in a direction orthogonal to the longitudinal direction. The vehicle body attachment portion 7 has a vehicle body fastening hole 8 in a portion protruding in a direction orthogonal to the longitudinal direction of the main body portion 5.

[0020] The fixing portion 9 is formed at the other longitudinal end of the main body portion 5. The fixing portion 9 is cylindrical and has a welded portion 6 extending along the longitudinal direction. As shown in Figure 4(a), the outer diameter of the fixing portion 9 is smaller than the outer diameter of the main body portion 5. Therefore, a step 14 is formed between the outer peripheral surface 15 of the main body portion 5 and the outer peripheral surface 16 of the fixing portion 9. That is, as shown in Figure 4(b), when viewed from the longitudinal direction (the shielded electric wire 3 side), the outer peripheral surface 16 of the fixing portion 9 is located inside the outer peripheral surface 15 of the main body portion 5.

[0021] The shield bracket 4 is formed from a single metal plate, comprising the main body 5, the vehicle body mounting portion 7, and the fixing portion 9. The metal plate is, for example, a steel plate that has been zinc-plated. It is desirable that the welded portion 6 of the main body 5 and the fixing portion 9 be formed by laser processing. By using laser processing, the welded portion 6 can be formed without special processing even if there is a step 14 between the outer surface 15 of the main body 5 and the outer surface 16 of the fixing portion 9.

[0022] To manufacture the shield bracket 4, a metal plate is press-formed to create cylindrical shapes for the main body 5 and the fixing part 9. Then, the welding part 6 is welded using laser processing, and the fixing part 9 is reduced in diameter to form a step 14 between it and the main body 5. Alternatively, a metal plate may be press-formed to create cylindrical shapes for the main body 5 and the fixing part 9. Then, the fixing part 9 may be reduced in diameter to form a step 14, and the welding part 6 may be welded using laser processing.

[0023] To connect the shield bracket 4 to the shield wire 3, as shown in Figures 2 to 4, first, the wire 12 is inserted through the braided wire 10. The wire 12 exposed from the braided wire is inserted through the fixing part 9 and the main body part 5, and at least the portion inserted through the fixing part 9 and the main body part 5 is covered with wire protection material 13. That is, the wire protection material 13 is longer than the total length of the main body part 5 and the fixing part 9. The braided wire 10 is fixed to the fixing part 9 by covering the outer surface 16 of the fixing part 9 near its end and crimping it with a metal band 11.

[0024] The metal component used for crimping is not limited to the metal band 11; a metal clamp may also be used. Furthermore, instead of a metal band, joining may be done by welding, brazing, adhesive, or other methods.

[0025] Furthermore, the wire protection material 13 can be, for example, a twisted tube, and does not have to be a resin molded product; any material capable of protecting the wire 12 is acceptable. In addition, the wire protection material 13 may be a vinyl tube or vinyl sheet with a certain degree of flexibility.

[0026] The shield bracket 4, connected to the braided wire 10 of the shielded wire 3, is fixed to the metal housing 2 by installing fasteners such as bolts (not shown) in the vehicle body fastening holes 8. The wire 12 extending from the main body 5 of the shield bracket 4 towards the vehicle body mounting portion 7 is connected to the connecting device to be connected.

[0027] Thus, in the first embodiment, the shield bracket 4 is formed by joining the main body 5 and the fixing part 9 in a cylindrical shape by a welded part 6, and the main body 5 and the vehicle body mounting part 7 are integrally formed. Therefore, the structure is simple and it can be manufactured inexpensively with simple processing. In addition, since the welded part 6 is laser processed, the main body 5 and the fixing part 9 can be reliably formed into a tubular shape to ensure shielding performance, and the equipment costs for press processing can also be reduced.

[0028] When viewed from the longitudinal direction, the outer circumferential surface 16 of the fixing portion 9 of the shield bracket 4 is located inward from the outer circumferential surface 15 of the main body portion 5. Therefore, when the braided wire 10 is fixed to the fixing portion 9 with the metal band 11, the metal band 11 does not protrude significantly outward from the main body portion 5. As a result, when fixing the shield bracket 4 to the metal housing 2, the metal band 11 does not interfere with the fixing.

[0029] Furthermore, the welded joint 6 is not limited to laser processing; it may be processed by other methods as well. For example, resistance welding or ultrasonic welding can result in a superior appearance after welding and allow for a thinner weld.

[0030] [Second Embodiment] Next, a second embodiment will be described. Figures 5 and 6 show the shield bracket 4a connected to the shield wire 3 according to the second embodiment. In the following description, components that perform the same function as in the first embodiment will be denoted by the same reference numerals as in Figures 1 to 4, and redundant explanations will be omitted.

[0031] The shield bracket 4a of the second embodiment has substantially the same configuration as the shield bracket 4, but differs from the shield bracket 4 of the first embodiment in that it has a wire retaining portion 17.

[0032] As shown in Figures 5 and 6, the shield bracket 4a has a wire retaining portion 17 that is integrally formed with the vehicle body mounting portion 7. The wire retaining portion 17 is formed by bending a metal plate that extends from the vehicle body mounting portion 7 in the opposite direction to the vehicle body fastening hole 8, so that its end portion 18 is located on the side of the vehicle body fastening hole 8. The space enclosed by the wire retaining portion 17 and the vehicle body mounting portion 7 communicates with a part of the interior of the main body portion 5.

[0033] The wire retaining portion 17 has spring properties. Therefore, when a force is applied to the end portion 18 in a direction away from the vehicle body mounting portion 7, the space enclosed by the wire retaining portion 17 and the vehicle body mounting portion 7 can be expanded, and when the force is removed from the end portion 18, it returns to its original state. The wire retaining portion 17 may also be made freely bendable. For example, it may be freely plastically deformable to expand or close the space.

[0034] To connect the shield bracket 4a to the shielded wire 3, as shown in Figures 5 and 6, the wire 12 protected by the wire protection material 13 is placed in the space enclosed by the wire retaining portion 17 and the vehicle body mounting portion 7. The wire retaining portion 17 and the vehicle body mounting portion 7 can hold the wire 12, which is routed through the main body portion 5, from the outside of the wire protection material 13.

[0035] The shield bracket 4a of the second embodiment has the same effects as the shield bracket 4 of the first embodiment. Furthermore, the shield bracket 4a can hold the electric wire 12, which is protected by an existing general-purpose electric wire protection material 13, from the outside of the electric wire protection material 13 by the vehicle body mounting portion 7 and the electric wire holding portion 17, thus simplifying the fixing structure of the electric wire 12. In addition, compared to the case in which a dedicated inner holder is used to protect the electric wire 12, costs can be reduced and the work of positioning and temporarily holding the inner holder is not required.

[0036] [Third Embodiment] Next, a third embodiment will be described. Figure 7 shows a shield bracket 4b connected to the shield wire 3. The shield bracket 4b of the third embodiment differs from the shield bracket 4 of the first embodiment in that it has a wire retaining portion 17a.

[0037] As shown in Figure 7, the shield bracket 4b has a wire retaining portion 17a connected to the vehicle body mounting portion 7. The wire retaining portion 17a is separate from the vehicle body mounting portion 7 and is formed by bending a metal plate. The wire retaining portion 17a is connected to the vehicle body mounting portion 7 by installing a fastener 19 for fixing the shield bracket 4b to the metal housing 2 in the vehicle body fastening hole 8. The space enclosed by the wire retaining portion 17a and the vehicle body mounting portion 7 communicates with a part of the interior of the main body portion 5.

[0038] To connect the shield bracket 4b to the shielded wire 3, as shown in Figure 7, the wire 12 protected by the wire protection material 13 is placed in the space enclosed by the wire retaining portion 17a and the vehicle body mounting portion 7. The wire retaining portion 17a and the vehicle body mounting portion 7 can hold the wire 12, which is routed through the main body portion 5, from the outside of the wire protection material 13.

[0039] The shield bracket 4b of the third embodiment has the same effect as the shield bracket 4a of the second embodiment. Furthermore, by using the shield bracket 4b, the shield bracket 4b can be fixed to the metal housing 2 using the fastener 19, and at the same time, the wire retaining portion 17a can be connected to the vehicle body mounting portion 7.

[0040] In the first to third embodiments, the main body 5 and the fixing part 9 are cylindrical, but the main body 5 and the fixing part 9 may be cylindrical in shapes other than circular. Also, the vehicle body mounting part 7 is not limited to protruding in the longitudinal direction of the main body 5 and in a direction perpendicular to the longitudinal direction.

[0041] Figure 8 shows the shield bracket 4c. The main body 5a of the shield bracket 4c is a rectangular cylinder with rounded corners. The vehicle body mounting portion 7a protrudes only in the longitudinal direction of the main body 5a. The vehicle body fastening hole 8 of the vehicle body mounting portion 7a is provided in a position that does not interfere with the electric wire 12. The shield bracket 4c has a different shape from the shield bracket 4 of the first embodiment, but has the same effect.

[0042] Preferred embodiments of the present invention have been described above with reference to the attached drawings, but the present invention is not limited to these examples. It will be obvious to those skilled in the art that various modifications or alterations can be conceived within the scope of the technical idea disclosed herein, and these will naturally also fall within the technical scope of the present invention.

[0043] For example, in the above-described embodiment, an example was explained in which a vehicle body fastening hole is formed in the vehicle body mounting portion to connect the shield bracket to the vehicle body. However, the shield bracket of the present invention may be fixed to a member connected to the vehicle body ground other than the metal housing 2 of the vehicle body 1. For example, the fastening hole in the mounting portion of the shield bracket can be used to connect to the housing ground of a battery pack housing or a unit such as a PCU. Furthermore, the configuration of the shield wire 3 is not limited to that described above, and multiple wires may be arranged inside the braided wire 10.

[0044] Furthermore, it goes without saying that the configurations in each of the embodiments described above can be combined with each other. [Explanation of Symbols]

[0045] 1... Vehicle body 2…Metal casing 3…Shielded wires 4, 4a, 4b, 4c... Shield brackets 5, 5a……Main body 6... Welded section 7, 7a... Mounting part for the vehicle body 8………Vehicle body fastening holes 9……Fixed part 10……braided wire 11… Metal band 12……Electric wire 13…Wire protection material 14... Step 15, 16……outer surface 17, 17a... Wire clamping section 18………End 19... Fixtures

Claims

1. A cylindrical body having a welded portion extending along its longitudinal direction, A mounting portion is formed at one end of the main body portion, is flat in shape, and has fastening holes, It is equipped with, The mounting portion is further equipped with a wire retaining portion connected to the aforementioned mounting portion, The shield bracket is characterized in that the wire holding portion and the mounting portion can hold the wire that is passed through the main body portion from the outside of the wire protection material arranged on the outer circumference of the wire.

2. The main body portion is further provided with a fixing portion formed at the other end, which is cylindrical and has a welded portion extending along its longitudinal direction. The outer circumferential surface of the fixing portion is located inward from the outer circumferential surface of the main body when viewed from the longitudinal direction. The shield bracket according to claim 1, characterized in that a braided wire, which is arranged on the outer circumference of an electric wire passed through the fixing portion, can be fixed to the outer circumference of the fixing portion with a metal member.

3. The shield bracket according to claim 1 or 2, characterized in that the welded portion is made by laser processing.

4. The shield bracket according to claim 1, characterized in that the wire retaining portion is formed integrally with the mounting portion.

5. The shield bracket according to claim 1, characterized in that the wire retaining portion is formed separately from the mounting portion and connected to the mounting portion using the fastening hole.

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