WO2018131539A1

WO2018131539A1 - Protective member

Info

Publication number: WO2018131539A1
Application number: PCT/JP2018/000078
Authority: WO
Inventors: 真治柳井
Original assignee: 住友電装株式会社
Priority date: 2017-01-11
Filing date: 2018-01-05
Publication date: 2018-07-19
Also published as: JP2018113786A

Abstract

A protective member 1 for protecting a wire harness W has a pipe 10 that encases and protects the wire harness W, and a cover 20 comprising a rubber molded article and attached to the outer circumferential surface 11 of the pipe 10. In the portion of the cover 20 covering the pipe 10, an attachment part 25 is formed to which a clamp 30 for holding the pipe 10 to a vehicle body is attached. A plurality of convex sections 25a and concave sections 25b is formed on the attachment part 25 in alternating fashion in the longitudinal direction of the pipe 10, and the clamp 30 has projections 34 that engage the concave sections 25b of the attachment part 25.

Description

Protective member

The present invention relates to a protective member for protecting a wire harness arranged in a vehicle.

Hybrid vehicles and electric vehicles employ a structure in which the wire harness is passed through a pipe in order to protect the wire harness that connects the battery pack and the electrical components that are spaced apart from each other from foreign matter. This pipe is fixed to the vehicle body by a clamp. For example, the clamp of Patent Document 1 includes a holding portion into which a cylindrical pipe can be inserted, and a vehicle body fixing portion that extends from the holding portion.

JP 2010-2105010 A

In the above clamp, when a force along the longitudinal direction of the pipe is applied to the pipe, the relative position between the pipe and the clamp in the longitudinal direction of the pipe may change. For example, the relative position between the pipe and the clamp may deviate from a preset position.

An object of the present invention is to provide a protective member that can suppress the displacement of the relative position between the pipe and the clamp.

The protective member according to one aspect of the present invention includes a pipe that externally protects the wire harness, and a cover that is made of a rubber molded product and is attached to the outer surface of the pipe. An attachment part to which a clamp for holding the pipe on the vehicle body is attached is formed, and one of the attachment part and the clamp has a plurality of recesses and projections alternately formed in the longitudinal direction of the pipe, and the attachment part The other of the clamps has a protrusion that engages the recess.

According to this configuration, since the projection on the other side of the clamp and the cover is engaged with the concave portion on one side of the clamp and the cover, the projection and the convex portion come into contact with each other when the cover and the clamp are about to move relative to each other. The relative movement between the clamp and the pipe is limited. Therefore, the shift of the relative position between the pipe and the clamp can be suppressed.

In the protective member, it is preferable that a clearance is formed between the protrusion and the protrusion adjacent to the protrusion.
According to this configuration, the clamp and the cover can be moved relative to each other by the clearance between the protrusion and the convex portion. For this reason, after the clamp is attached to the vehicle body, the positions of the cover and the pipe relative to the vehicle body can be adjusted by the clearance.

In the protective member, it is preferable that the attachment portion is formed with the concave portion and the convex portion, and the clamp has the protrusion.
In the protective member, the convex portion is preferably a solid convex portion.

According to this configuration, since the plurality of convex portions of the cover are solid convex portions, when the vibration from the clamp propagates to the convex portion of the cover, the convex portion easily absorbs the vibration. Therefore, generation | occurrence | production of the unusual noise resulting from the vibration of a clamp can be suppressed.

In the protective member, the portion of the cover that protrudes from the pipe in the longitudinal direction has a folding bellows portion for bending the cover, and the pitch of the plurality of convex portions of the mounting portion is The pitch is preferably shorter than the pitch of the convex portions of the folding bellows.

According to this configuration, the mounting portion is less likely to bend than the folding bellows portion. For this reason, it is easy to insert a pipe into the mounting portion. In addition, the position of the clamp with respect to the cover can be finely adjusted.

According to the protective member of the present invention, the displacement of the relative position between the pipe and the clamp can be suppressed.

Sectional drawing of 1st Embodiment of a protection member. FIG. 2 is a partially enlarged view of FIG. 1. The perspective view of a clamp. Sectional drawing which shows 2nd Embodiment of a protection member.

(First embodiment)
A first embodiment of the protective member will be described with reference to FIGS.
The protective member 1 shown in FIG. 1 includes a pipe 10 that protects the wire harness W from the exterior and a cover 20 that is attached to the outer peripheral surface 11 at the end of the pipe 10. A clamp 30 for holding the pipe 10 to the vehicle body is attached to the cover 20. The protection member 1 is attached to the lower surface of the floor panel of the vehicle body, for example. The protective member 1 suppresses the noise of the wire harness W from affecting the electrical components of the vehicle, and protects the wire harness W from stones and foreign matters that are splashed from the road surface during traveling. The wire harness W connects an electronic control unit (ECU) that controls an electric motor for driving the vehicle and a battery pack (battery).

The pipe 10 is made of metal, and is formed of, for example, an aluminum alloy. The cross-sectional shape of the pipe 10 cut by a plane perpendicular to the longitudinal direction of the pipe 10 is a circle. The pipe 10 is disposed along the lower surface of the floor panel. A wire harness W is inserted into the pipe 10. The pipe 10 protects the wire harness W from stones and foreign substances and shields the noise of the wire harness W. The wire harness W protrudes from the end of the pipe 10 on the ECU side. The end of the braided wire 40 is connected to the end of the pipe 10 on the ECU side by a metal caulking ring 50. The braided wire 40 covers the wire harness W protruding from the pipe 10. Thereby, the noise of the wire harness W which protrudes from the pipe 10 is shielded. The braided wire 40 is inserted into the corrugated tube 60. The end of the corrugated tube 60 on the pipe 10 side is arranged with a gap from the pipe 10. The pipe 10 may be made of resin. In this case, the pipe 10 has a function of protecting the wire harness W from stones and foreign matters, but does not have a function of shielding the noise of the wire harness W.

The cover 20 covers a connecting portion between the pipe 10 and the braided wire 40 and a connecting portion between the braided wire 40 and the corrugated tube 60. The cover 20 is a rubber molded product, and is formed of, for example, ethylene propylene diene rubber (EPDM). The shape of the cover 20 is substantially cylindrical. The pipe 10 is inserted into one end of the cover 20, and the end of the braided wire 40 and the end of the corrugated tube 60 are inserted into the other end of the cover 20. For this reason, the cover 20 can change the direction of the corrugated tube 60 with respect to the pipe 10 by being bent. Further, the cover 20 suppresses the entry of foreign matter such as water between the pipe 10 and the cover 20, and suppresses the entry of foreign matter between the corrugated tube 60 and the cover 20.

The cover 20 includes a first connection portion 21 into which the corrugated tube 60 is inserted, a second connection portion 22 into which the pipe 10 is inserted, and an intermediate portion 23 between the first connection portion 21 and the second connection portion 22. Have The 1st connection part 21, the 2nd connection part 22, and the intermediate part 23 are integrated. The pipe 10 is inserted from the second connection portion 22 to the middle of the intermediate portion 23. The braided wire 40 is inserted from the first connecting portion 21 to the middle of the intermediate portion 23. The caulking ring 50 is accommodated in the intermediate portion 23. The inner diameter of the intermediate part 23 is larger than the inner diameter of the first connection part 21 and the inner diameter of the second connection part 22.

Four seal lips 21 a are formed at a constant pitch on the inner peripheral side of the first connection portion 21. Each seal lip 21 a is formed over the entire circumference of the inner peripheral surface of the first connection portion 21. The seal lip 21 a is fitted into an uneven valley formed on the outer peripheral surface of the corrugated tube 60. A tie band 24 is attached to the outer peripheral surface of the first connection portion 21. Thereby, the corrugated tube 60 and the cover 20 are fixed. Further, since the seal lip 21a is strongly compressed by the corrugated tube 60, the sealing performance between the cover 20 and the corrugated tube 60 is enhanced.

The second connection part 22 has an attachment part 25 and a connection end part 26. The attachment portion 25 is formed on the intermediate portion 23 side in the second connection portion 22. A clamp 30 is attached to the attachment portion 25. Four seal lips 26 a are formed at a predetermined pitch on the inner peripheral side of the connection end portion 26. Each seal lip 26 a is formed over the entire circumference of the inner peripheral surface of the connection end portion 26. A tie band 27 is attached to the outer peripheral surface of the connection end portion 26. Thereby, the pipe 10 and the cover 20 are fixed. Further, since the seal lip 26a is strongly compressed by the pipe 10, the sealing performance between the cover 20 and the pipe 10 is improved.

As shown in FIG. 2, the attachment portion 25 has a plurality of convex portions 25 a and concave portions 25 b formed alternately in the longitudinal direction of the pipe 10. The convex portion 25 a is formed in an annular shape when viewed from the longitudinal direction of the pipe 10. The inner peripheral surface of the attachment portion 25 is formed by a flat surface having no irregularities. For this reason, the thickness of the convex part 25a is thicker than the thickness of the concave part 25b. Each convex part 25a is a solid convex part.

As shown in FIG. 3, the clamp 30 has a first portion 31 and a second portion 32. The end portion of the first portion 31 on the second portion 32 side and the end portion of the second portion 32 on the first portion 31 side are connected to each other by a connecting portion 33. The clamp 30 is configured such that the first portion 31 and the second portion 32 can be opened and closed with the connecting portion 33 as a fulcrum. The clamp 30 is made of resin, and is formed so that the first portion 31, the second portion 32, and the connecting portion 33 are integrated.

The first portion 31 and the second portion 32 are formed in a substantially semicircular shape. Each of the first portion 31 and the second portion 32 has a pair of protrusions 34. Each protrusion 34 may be a long protrusion extending in a substantially semicircular shape. The pair of protrusions 34 of the first portion 31 protrudes from the inner surface 31a of the first portion 31 curved in a substantially semicircular shape. The pair of protrusions 34 of the second portion 32 protrudes from the inner surface 32a of the second portion 32 curved in a substantially semicircular shape. The pair of protrusions 34 are arranged with a space therebetween. The pair of protrusions 34 are provided on the inner surfaces 31 a and 32 a so as to be substantially annular when the first portion 31 and the second portion 32 are combined. The first portion 31 has a pair of lock claws 31b. The second portion 32 has a pair of lock receiving portions 32b. The pair of lock claws 31b and the pair of lock receiving portions 32b are coupled to each other by a snap-fit method. As a result, the first portion 31 and the second portion 32 are locked together.

The second portion 32 has an attachment portion 35 for attaching to the lower surface of the floor panel of the vehicle body. An insertion port 35 a is opened on the end surface of the attachment portion 35. The floor panel bracket 100 is inserted into the insertion slot 35a. An opening 101 is formed in the bracket 100. A claw portion 35b is formed in the insertion port 35a. When the bracket 100 is inserted into the insertion port 35a, the opening 101 and the claw portion 35b of the bracket 100 are coupled to each other by a snap-fit method. Thereby, the protection member 1 is hold | maintained at a floor panel.

As shown in FIG. 1, the clamp 30 is attached to the attachment portion 25 of the cover 20. The inner surface 31 a of the first portion 31 and the inner surface 32 a of the second portion 32 are opposed to the tip surfaces of the plurality of convex portions 25 a of the attachment portion 25. As shown in FIG. 2, the pair of protrusions 34 of the clamp 30 are inserted into the recesses 25b between the adjacent protrusions 25a. A clearance C is formed between the pair of protrusions 34 inserted into the recesses 25b and the protrusions 25a adjacent to the pair of protrusions 34. As shown in FIG. 1, the length Lc of the region where the plurality of convex portions 25 a are formed is longer than the length Lp between the pair of protrusions 34.

Next, the operation of this embodiment will be described.
As shown in FIG. 2, when the clamp 30 is attached to the attachment portion 25 of the cover 20, the pair of protrusions 34 of the clamp 30 is inserted into the recess 25 b of the attachment portion 25. The clamp 30 is attached to the lower surface of the floor panel through the bracket 100. In this state, for example, when a worker attaches the protection member 1 to the floor panel, when a force that moves the pipe 10 in the longitudinal direction of the pipe 10 is applied to the pipe 10, the cover 20 is moved together with the pipe 10 against the clamp 30. An attempt is made to move in the longitudinal direction of the pipe 10. Further, when a force for moving the pipe 10 in the longitudinal direction of the pipe 10 is applied to the pipe 10 due to vibration during vehicle travel, the cover 20 tends to move in the longitudinal direction of the pipe 10 together with the pipe 10 with respect to the clamp 30. However, the movement of the cover 20 in the longitudinal direction of the pipe 10 is limited by the pair of protrusions 34 of the clamp 30 coming into contact with the convex portion 25 a of the attachment portion 25. For this reason, the shift | offset | difference of the relative position of the pipe 10 and the clamp 30 can be suppressed.

According to this embodiment, the following effects can be achieved.
(1) The attachment portion 25 of the cover 20 is located between the clamp 30 and the pipe 10. For this reason, even if the vibration of the floor panel propagates to the clamp 30, the rubber molded product cover 20 absorbs the vibration of the clamp 30. For this reason, it is possible to suppress the vibration of the clamp 30 from propagating to the pipe 10. Further, since the clamp 30 does not directly contact the metal pipe 10, it is possible to suppress the generation of abnormal noise that is a contact sound between the clamp 30 and the pipe 10 due to vibration of the clamp 30.

(2) Since the clearance C is formed between the pair of protrusions 34 of the clamp 30 and the adjacent protrusions 25a of the mounting portion 25, the clamp 30 and the cover 20 can be moved relative to each other by the clearance C. It becomes. For this reason, after the clamp 30 is attached to the bracket 100 of the floor panel, the positions of the pipe 10 and the cover 20 with respect to the floor panel can be adjusted in the clearance C.

In addition, since the relative rotation between the clamp 30 and the cover 20 is enabled by the clearance C, the relative position between the cover 20 and the clamp 30 in the circumferential direction of the cover 20 can be adjusted.

(3) Since the convex part 25a of the attachment part 25 is a solid convex part, the vibration of the clamp 30 is easily absorbed by the attachment part 25. Therefore, it is possible to further suppress the generation of abnormal noise due to the vibration of the clamp 30.

(4) Since the length Lc of the region where the plurality of convex portions 25a are formed is longer than the length Lp between the pair of protrusions 34, the position of the clamp 30 relative to the attachment portion 25 in the longitudinal direction of the pipe 10 can be adjusted. . Therefore, the degree of freedom of the position of the clamp 30 with respect to the cover 20 can be increased.

(Second Embodiment)
With reference to FIG. 4, 2nd Embodiment of the protection member 1 is described. The protection member 1 according to the present embodiment is different from the protection member 1 according to the first embodiment in that the first connecting portion 21A of the cover 20A extends so as to cover the entire braided wire 40, and the corrugated tube 60. Differences are omitted. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted as appropriate. Further, the description of the relationship between the same constituent members will be omitted as appropriate.

The first connection portion 21A of the cover 20A is connected to a connector 110 of the ECU, for example. A braided wire 40 is connected to the end of the connector 110. The first connecting portion 21 </ b> A covers the connector 110 and the braided wire 40. 21 A of 1st connection parts have the connector connection part 28 and the bellows part 29 for bending. The connector connecting portion 28 constitutes an opening on the connector 110 side in the first connecting portion 21A. A connector 110 is inserted into the connector connecting portion 28. A plurality of irregularities are alternately formed in the bending bellows portion 29 in the longitudinal direction of the pipe 10. The plurality of irregularities are formed over the entire circumference of the folding bellows portion 29. The unevenness of the folding bellows portion 29 is formed on both the outer peripheral surface and the inner peripheral surface of the folding bellows portion 29. Thereby, the folding bellows portion 29 is easily bent.

The bending bellows portion 29 is longer than the attachment portion 25 in the longitudinal direction of the pipe 10. The outer diameter of the attachment portion 25 is smaller than the outer diameter of the first connection portion 21A. The pitch Pt1 between the adjacent convex portions 25a of the mounting portion 25 is shorter than the pitch Pt2 between the adjacent convex portions of the folding bellows portion 29. For this reason, it is easy to insert the pipe 10 into the mounting portion 25. In addition, when the clamp 30 is attached to the attachment portion 25, the position of the clamp 30 in the longitudinal direction of the pipe 10 can be finely adjusted.

(Modification)
In addition, each said embodiment can also be changed and implemented as follows.
In each of the above embodiments, the cross-sectional shapes of the pipe 10, the cover 20 and the like cut along a plane orthogonal to the longitudinal direction of the pipe 10 can be arbitrarily changed. For example, the cross-sectional shapes of the pipe 10 and the cover 20 may be elliptical.

In the above embodiments, the number and shape of the protrusions 34 of the clamp 30 can be arbitrarily changed. For example, the number of protrusions 34 in each of the first portion 31 and the second portion 32 may be one or three or more. The number of protrusions 34 in the first portion 31 may be different from the number of protrusions 34 in the second portion 32. The shape of the protrusion 34 may be an arc shape shorter than a semicircle. A plurality of arc shapes shorter than the semicircle may be formed in the circumferential direction of the attachment portion 25. In short, the shape of the protrusion 34 may be a shape that can be inserted into the concave portion 25 b of the attachment portion 25.

In each of the above embodiments, the length Lc of the region where the plurality of convex portions 25a are formed may be equal to the length Lp between the pair of protrusions 34.
In each of the embodiments described above, the attachment portion 25 may have an uneven shape similar to the uneven shape of the folding bellows portion 29.

In each of the above embodiments, the plurality of convex portions 25 a and the plurality of concave portions 25 b of the attachment portion 25 may be formed only on a part of the cover 20 in the circumferential direction.
In each of the above embodiments, the mounting portion 25 may have a pair of protrusions, and the clamp 30 may be configured such that a plurality of convex portions and concave portions are alternately formed in the longitudinal direction of the pipe 10. The pair of protrusions of the attachment portion 25 are formed with an interval in the longitudinal direction of the pipe 10.

In each of the above embodiments, the pipe 10 is a single material member made of metal or resin, but the pipe 10 is a composite member in which a conductive shield layer is laminated or embedded in a non-metallic pipe body. May be.

The present disclosure encompasses the following implementation examples. The reference numerals of the constituent elements of the embodiment are given for the purpose of understanding but not limitation.
[Supplementary Note 1] The protective member (1) of some mounting examples is
A pipe (10) having an open end for insertion of one or more electrical wires (W) and an outer surface (11) and configured to function as an electromagnetic shield and / or mechanical protector;
An elongated cylindrical cover joint (20) having an axis and an outer surface, wherein the pipe (10) overlaps the outer surface (11) of the pipe (10) at least at the opening end. The cover joint (20) connected in-line with the pipe (10);
A clamp (30) for fixing the cover joint (20) to the pipe (10), including an inner surface (31a, 32a) fastened to the outer surface of the cover joint (20). )When,
A plurality of outward positioning protrusions (25a) protruding outward from the outer surface of the cover joint (20);
A plurality of inward positioning protrusions (34) protruding inwardly from the inner surface of the clamp (30), wherein at least one of the plurality of inward positioning protrusions (34) is the plurality of the cover joint (20). Engaging with at least one of the outward positioning protrusions (25a).

[Supplementary Note 2] In the protection member (1) of some mounting examples, the plurality of outward positioning protrusions (25a) of the cover joint (20) are first along the axis of the cover joint (20). The inward positioning protrusions (34) of the clamp (30) are formed at a second constant pitch along the axis of the cover joint (20), The second constant pitch is an integer multiple of the first constant pitch.

[Appendix 3] In the protective member (1) of some mounting examples, each of the plurality of inward positioning protrusions (34) is one of the plurality of outward positioning protrusions (25a) of the cover joint (20). Engage with one.

[Appendix 4] The protection member (1) of some mounting examples further includes a flexible tube (60) for inserting the one or more electric wires (W), and the cover joint (20) It is configured to overlap the flexible tube (60) and connect the flexible tube (60) and the pipe (10) in-line.

[Appendix 5] In some implementation examples, the one or more wires (W) are connected to an electrical connector member (110), and the cover joint (20) overlaps the electrical connector member (110). The electrical connector member (110) and the pipe (10) are connected in-line.

[Appendix 6] In some implementation examples, the plurality of outward positioning protrusions (25a) define a plurality of recesses (25b), and each of the recesses (25b) corresponds to the plurality of inward positioning protrusions (34). One can be accepted loosely.

[Appendix 7] In some implementation examples, the outermost end of each outward positioning protrusion (25a) is in direct contact with the inner surface (31a) of the clamp (30).
[Appendix 8] In some implementation examples, the innermost end of each inward positioning protrusion (34) is not in contact with the outer surface of the cover joint (20).

[Appendix 9] In some implementation examples, the cover joint (20) is a weather resistant seal made of synthetic rubber.
[Supplementary Note 10] In some implementation examples, the cover joint (20) is a one-piece sleeve made of synthetic rubber.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the technical concept thereof. For example, some of the parts described in the embodiment (or one or more aspects thereof) may be omitted, or some parts may be combined. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

DESCRIPTION OF SYMBOLS 1 ... Protective member, 10 ... Pipe, 11 ... Outer peripheral surface (outer surface), 20, 20A ... Cover, 25 ... Mounting part, 25a ... Convex part, 25b ... Concave part, 29 ... Bending bellows part, 30 ... Clamp, 34 ... Protrusion, W ... wire harness, C ... clearance, Lc, Lp ... length, Pt1, Pt2 ... pitch.

Claims

A pipe that protects the wire harness from the exterior;
A cover made of a rubber molded product and attached to the outer surface of the pipe;
Have
An attachment portion to which a clamp for holding the pipe on the vehicle body is attached is formed on a portion of the cover that covers the pipe,
In one of the attachment portion and the clamp, a plurality of concave portions and convex portions are alternately formed in the longitudinal direction of the pipe,
The other of the attachment portion and the clamp has a protrusion that engages with the recess.
The protection member according to claim 1, wherein a clearance is formed between the protrusion and the protrusion adjacent to the protrusion.
In the attachment portion, the concave portion and the convex portion are formed,
The protective member according to claim 1, wherein the clamp has the protrusion.
The protective member according to claim 3, wherein the convex portion is a solid convex portion.
The portion of the cover that protrudes in the longitudinal direction of the pipe from the pipe has a folding bellows portion for bending the cover,
The protective member according to claim 3 or 4, wherein a pitch of the plurality of convex portions of the attachment portion is shorter than a pitch of the convex portions of the bending bellows portion.