CN112823458A

CN112823458A - Cable connector

Info

Publication number: CN112823458A
Application number: CN201980067075.2A
Authority: CN
Inventors: 谷上拓也; 森康夫
Original assignee: Seiwa Electric Mfg Co Ltd
Current assignee: Seiwa Electric Mfg Co Ltd
Priority date: 2018-10-22
Filing date: 2019-08-02
Publication date: 2021-05-18
Anticipated expiration: 2039-08-02
Also published as: JP6616875B1; JP2020068556A; TW202017274A; CN112823458B; WO2020084856A1

Abstract

The invention provides a cable joint which can inhibit foreign matters from entering a housing and reduce noise of a cable. The cable connector 100 is used to attach the cable 150 to the housing 160, and includes a connector body 1 attachable to the housing 160, a cap 2 fastened to the connector body 1, a sleeve 3 press-fitted between the connector body 1 and the cable 150, and a ferrite core 4 for reducing noise of the cable 150. The ferrite core 4 is mounted on the cap 2.

Description

Cable connector

Technical Field

The present invention relates to a cable joint.

Background

Conventionally, cable splices for attaching cables to housings are known (for example, see patent documents 1 and 2).

The cable connector of patent document 1 includes a connector main body that can be attached to a housing, a cap that is fastened to the connector main body, and a sleeve that is press-fitted between the connector main body and a cable by fastening the cap. In this cable joint, since the gap between the joint body and the cable is filled with the sleeve, it is possible to suppress the entry of foreign matter (for example, water, oil, and dust) into the housing.

The cable terminal of patent document 2 is formed in a cylindrical shape, and has a screw portion for fixing formed on an outer peripheral surface and a ferrite core mounted on an inner peripheral surface. A hole through which a cable is inserted is formed in the ferrite core. In this cable joint, the noise of the cable can be reduced by the ferrite core.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2018-98828

Patent document 2: japanese patent laid-open publication No. 2002-171612

Disclosure of Invention

Problems to be solved by the invention

However, the cable head of patent document 1 described above has a problem that noise of the cable cannot be reduced although intrusion of foreign matter into the housing can be suppressed. In addition, in the cable connector of patent document 2, although noise of the cable can be reduced, foreign matter may enter from a gap between the ferrite core and the cable.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a cable connector capable of reducing noise of a cable while suppressing intrusion of foreign matter into a housing.

Means for solving the problems

The cable connector according to the present invention is used for mounting a cable to a housing, and includes a connector body that can be mounted to the housing, a cap that is fastened to the connector body, a sleeve that is press-fitted between the connector body and the cable, and a ferrite core that reduces noise of the cable. The ferrite core is mounted on the cap.

With this configuration, the gap between the joint body and the cable can be filled with the sleeve, and therefore, intrusion of foreign matter into the housing can be suppressed. In addition, the noise of the cable can be reduced by the ferrite core.

In the cable head, the cap may include a cylindrical side peripheral wall portion and a top wall portion formed at one end portion of the side peripheral wall portion, the top wall portion may be formed with a first insertion hole through which the cable is inserted, the inner peripheral surface of the side peripheral wall portion may be formed with an internal thread portion on the other end portion side, and the ferrite core may be formed in an annular shape so as to allow the cable to be inserted, and may be disposed between the top wall portion and the internal thread portion in the side peripheral wall portion of the cap.

The cable joint in which the ferrite core is disposed between the top wall portion and the female screw portion may further include a mounting member for mounting the ferrite core to the cap.

In the cable head including the above-described mounting member, the mounting member may include a circular plate portion having a second insertion hole through which the cable is inserted, an attachment portion disposed on one surface side of the plate portion, and a holding portion disposed on the other surface side of the plate portion, the attachment portion may be formed at an inner edge portion of the plate portion and attached to the cap, and the holding portion may be formed at an outer edge portion of the plate portion and holds the ferrite core.

In the cable terminal in which the attachment member includes the attachment portion and the holding portion, the attachment portion may have a snap (snap fit) structure and be configured to be fitted into the first insertion hole of the top wall portion of the cap.

In the cable head in which the attachment member includes the attachment portion and the holding portion, the holding portion may have a snap-fit structure and be configured to hold the ferrite core from the outer peripheral surface side.

In the cable joint in which the ferrite core is disposed between the top wall portion and the female screw portion, the joint main body may include a cylindrical main body portion through which the cable is inserted and a flange portion protruding outward from the other end portion of the main body portion, the flange portion may be configured to be attachable to the housing, the male screw portion that is screwed into the female screw portion may be formed on an outer peripheral surface of the main body portion, the sleeve may be configured to be formed into a cylindrical shape so that the cable can be inserted, and the sleeve may be pressed between the main body portion and the cable by fastening the cap to the joint main body, whereby the sleeve is pressed by the ferrite core.

Effects of the invention

According to the cable connector of the present invention, noise of the cable can be reduced while suppressing intrusion of foreign matter into the housing.

Drawings

Fig. 1 is a perspective view showing a cable terminal according to the present embodiment.

Fig. 2 is an exploded perspective view illustrating the cable connector of fig. 1.

Fig. 3 is a cross-sectional view showing a state in which the cable connector of fig. 1 fixes the cable to the housing.

Fig. 4 is a perspective view illustrating a cap of the cable connector of fig. 1.

Fig. 5 is a perspective view showing a holder of the cable terminal of fig. 1.

Fig. 6 is a perspective view showing a state where the ferrite core is held by the holder of fig. 5.

Fig. 7 is a perspective view showing a state in which the holder of fig. 6 is attached to the cap.

Detailed Description

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

First, the structure of the cable terminal 100 according to one embodiment of the present invention will be described with reference to fig. 1 to 7.

As shown in fig. 3, the cable connector 100 is provided to attach the cable 150 to the housing 160. The cable connector 100 is configured such that the cable 150 inserted through the insertion hole 161 of the housing 160 is fixed to the housing 160. For example, the cable 150 is a power cable for connecting an inverter to a motor, not shown, and the case 160 is an inverter case for accommodating the inverter. The side (X1 direction side) on which the cable connector 100 is mounted to the housing 160 is the outside side of the housing 160, and the opposite side (X2 direction side) is the inside side of the housing 160.

As shown in fig. 2, the cable connector 100 includes a connector body 1, a cap 2, a sleeve 3, a ferrite core 4, and a holder 5. The holder 5 is an example of the "mounting member" of the present invention.

[ Joint main body ]

The joint main body 1 is configured to be attachable to the housing 160. The joint body 1 is made of, for example, resin, and includes a cylindrical body portion 11 through which the cable 150 is inserted, and a flange portion 12 extending outward from the other end portion (end portion on the X2 direction side) of the body portion 11. An external thread portion 13 to which the cap 2 is screwed is formed on the outer peripheral surface of the body portion 11. As shown in fig. 3, a large diameter portion 14a, a reduced diameter portion (tapered portion) 14b, and a small diameter portion 14c are formed continuously on the inner peripheral surface of the body portion 11. The large diameter portion 14a is disposed on one side (the side in the X1 direction), the small diameter portion 14c is disposed on the other side (the side in the X2 direction), and the reduced diameter portion 14b is disposed between the large diameter portion 14a and the small diameter portion 14 c. The reduced diameter portion 14b is formed such that the opening diameter gradually decreases toward the flange portion 12 side (the side in the X2 direction).

The flange portion 12 is configured to be attachable to the housing 160, and when the flange portion 12 is attached to the housing 160, the small diameter portion 14c is fitted into the insertion hole 161 of the housing 160. The flange portion 12 is formed with a bolt insertion hole 15, the housing 160 is formed with a bolt insertion hole 162, and the flange portion 12 is attached to the housing 160 by fastening a bolt (not shown) inserted through the bolt insertion hole 15 and the bolt insertion hole 162.

[ Cap ]

The cap 2 is configured to be fastened to the joint main body 1. The cap 2 is made of, for example, resin, and includes, as shown in fig. 4, a cylindrical side peripheral wall portion 21 and a top wall portion 22 formed at one end (end on the X1 direction side) of the side peripheral wall portion 21. The top wall portion 22 is formed with an insertion hole 23 through which the cable 150 is inserted. A female screw portion 24 that is screwed into the male screw portion 13 is formed on the other end portion side (the X2 direction side) of the inner peripheral surface of the side peripheral wall portion 21. In addition, in the cap 2, an accommodating portion 25 that accommodates the ferrite core 4 is provided between the ceiling wall portion 22 and the female screw portion 24 in the side peripheral wall portion 21. The insertion hole 23 is an example of the "first insertion hole" of the present invention.

[ Sleeve ]

As shown in fig. 2, the sleeve 3 is made of rubber, for example, and is configured to be elastically deformable. The sleeve 3 is formed in a cylindrical shape so that the cable 150 can be inserted therethrough. The sleeve 3 is press-fitted between the body 11 of the joint body 1 and the cable 150.

[ ferrite cores ]

The ferrite core 4 is made of a magnetic material and is provided to reduce noise of the cable 150. The ferrite core 4 is weak against impact and is formed in an annular shape so that the cable 150 can be inserted therethrough. The ferrite core 4 is attached to the cap 2 by the holder 5 and is accommodated in the accommodating portion 25 of the cap 2.

[ holding Member ]

As shown in fig. 7, the holder 5 is provided for attaching the ferrite core 4 to the cap 2. That is, the holder 5 is interposed between the cap 2 and the ferrite core 4, and is made of, for example, a thin plate-like material. The holder 5 is made of, for example, resin, and includes a plate portion 51, a mounting portion 52, and a holding portion 53, as shown in fig. 5.

The plate portion 51 is formed in a substantially circular shape, and has an insertion hole 51a in the center thereof through which the cable 150 is inserted. The mounting portion 52 is disposed on one surface side (the side in the X1 direction) of the plate portion 51, and the holding portion 53 is disposed on the other surface side (the side in the X2 direction) of the plate portion 51. The insertion hole 51a is an example of the "second insertion hole" of the present invention.

The mounting portion 52 is configured to be mounted to the cap 2. The mounting portions 52 are formed on an inner edge portion of the plate portion 51, and a plurality of the mounting portions are provided at predetermined intervals in the circumferential direction. That is, the plurality of mounting portions 52 are arranged in a circular shape so as to surround the insertion hole 51 a. For example, six mounting portions 52 are arranged at 60-degree intervals. Each mounting portion 52 includes a pair of arm portions 521 extending from the plate portion 51 to one side (the side in the X1 direction), a coupling portion 522 coupling the tips of the pair of arm portions 521, and a claw portion 523 projecting radially outward from the coupling portion 522. The arm 521 is configured to be elastically deformable in the radial direction. As shown in fig. 1, the claw portion 523 engages with an outer surface (surface on the X1 direction side) of the top wall portion 22 of the cap 2. That is, each mounting portion 52 has a snap-fit structure and is configured to be fitted into the insertion hole 23 of the top wall portion 22 of the cap 2.

As shown in fig. 6, the holding portion 53 is configured to hold the ferrite core 4. The plurality of holding portions 53 are formed at the outer edge of the plate portion 51 and are provided at predetermined intervals in the circumferential direction. That is, the plurality of holding portions 53 are arranged in a circular shape so as to surround the plate portion 51. The holding portions 53 are arranged so as to be circumferentially offset from the mounting portions 52, and the mounting portions 52 and the holding portions 53 are alternately arranged in the circumferential direction. For example, six holding portions 53 are arranged at 60-degree intervals, and the holding portions 53 are shifted by 30 degrees with respect to the mounting portion 52. Each of the holding portions 53 has a pair of arm portions 531 extending from the plate portion 51 to the other side (the side in the X2 direction), a coupling portion 532 coupling the distal ends of the pair of arm portions 531, and a claw portion 533 projecting radially inward from the coupling portion 532. The arm portions 531 are configured to be elastically deformable in the radial direction. The claw portions 533 engage with the other surface (surface on the X2 direction side) of the ferrite core 4. That is, each holding portion 53 has a snap-fit structure, and is configured to hold the ferrite core 4 from the outer peripheral surface side.

Method for assembling cable terminal

Next, an assembling method of the cable head 100 according to the present embodiment will be described with reference to fig. 1 to 7.

First, the joint body 1 (see fig. 3) is attached to the housing 160 (see fig. 3). Specifically, the flange portion 12 of the joint main body 1 is attached to the housing 160 by fastening bolts (not shown) inserted through the bolt insertion holes 15 of the joint main body 1 and the bolt insertion holes 162 of the housing 160. At this time, the small diameter portion 14c of the joint body 1 is fitted into the insertion hole 161 of the housing 160, and the internal space of the joint body 1 communicates with the inside of the housing 160 through the insertion hole 161.

As shown in fig. 6, the ferrite core 4 is held by the holding portion 53 of the holder 5. Specifically, the arm portions 531 (see fig. 5) of the holding portion 53 are elastically deformed outward in the radial direction, and the ferrite core 4 is pushed toward the plate portion 51 with the claw portions 533 of the holding portion 53 retracted. When the ferrite core 4 is pushed into contact with the plate portion 51, the arm portions 531 return to the original positions, and the claw portions 533 engage with the other surface (surface on the X2 direction side) of the ferrite core 4. Therefore, the ferrite core 4 is held by the holding portion 53. In a state where the ferrite core 4 is held by the holding portion 53, the ferrite core 4 is sandwiched by the plate portion 51 and the claw portions 533 in the thickness direction, and the outer peripheral surface of the ferrite core 4 is surrounded by the arm portions 531.

Next, as shown in fig. 7, the holder 5 holding the ferrite core 4 is attached to the cap 2. Specifically, when the attachment portion 52 (see fig. 2) of the holder 5 is inserted into the insertion hole 23 (see fig. 2) of the cap 2, the claw portion 523 is pressed radially inward by the inner peripheral surface of the insertion hole 23, and the arm portion 521 is elastically deformed. Then, when the claw portion 523 passes through the insertion hole 23, the arm portion 521 returns to the original position, and the claw portion 523 engages with the outer surface (the surface on the X1 direction side) of the top wall portion 22 of the cap 2. Therefore, the attachment portion 52 (see fig. 1) is attached to the cap 2 (see fig. 1). When the attachment portion 52 is attached to the cap 2, the arm 521 is inserted into the insertion hole 23, and the top wall 22 is sandwiched between the plate 51 and the claw 523. That is, the arm portion 521 is disposed along the inner peripheral surface of the insertion hole 23, and the plate portion 51 is disposed along the inner surface (surface on the X2 direction side) of the top wall portion 22. Further, the arm portions 531 of the holder 5 are arranged along the inner surface of the side peripheral wall portion 21 of the cap 2.

Thus, the ferrite core 4 is attached to the cap 2 via the holder 5. The ferrite core 4 attached to the cap 2 is accommodated in the accommodating portion 25 of the cap 2 (see fig. 4).

Then, the cable 150 (see fig. 3) is inserted through the insertion hole 161 of the housing 160 and the body portion 11 of the joint body 1, and the sleeve 3 and the cap 2 are inserted into the cable 150. Since the ferrite core 4 is attached to the cap 2 via the holder 5, the cable 150 is inserted through the insertion hole 23 of the cap 2, the insertion hole 51a of the holder 5, and the ferrite core 4.

Next, as shown in fig. 3, the female screw portion 24 of the cap 2 is fastened to the male screw portion 13 of the joint body 1 in a state where the sleeve 3 is fitted to the body portion 11 of the joint body 1. At this time, the sleeve 3 is pressed toward the flange portion 12 (toward the X2) by the ferrite core 4 in the cap 2. Therefore, the ferrule 3 is pressed between the reduced diameter portion 14b of the joint main body 1 and the cable 150, and the ferrule 3 is elastically deformed and pressed in. Therefore, since the gap between the joint body 1 and the cable 150 is filled with the sleeve 3, the entry of foreign matter (for example, water, oil, and dust) into the housing 160 is suppressed. Further, the ferrite core 4 is pressed toward the top wall portion 22 side of the cap 2 by the repulsive force of the sleeve 3, and thus the position of the ferrite core 4 in the cap 2 is stabilized. Further, the screwing amount of the cap 2 is adjusted according to, for example, the diameter of the cable 150 or the like. When the cap 2 is fastened to the joint body 1, the top wall portion 22 of the cap 2 slides with respect to the plate portion 51 of the holder 5.

Effects-

In the present embodiment, as described above, the gap between the connector body 1 and the cable 150 can be filled by press-fitting the sleeve 3 between the connector body 1 and the cable 150, and therefore, intrusion of foreign matter into the housing 160 can be suppressed. In addition, by mounting the ferrite core 4 on the cap 2, the noise of the cable 150 can be reduced. Therefore, noise of the cable 150 can be reduced while suppressing intrusion of foreign matter into the housing 160.

In the present embodiment, since the ferrite core 4 is accommodated in the accommodating portion 25 of the cap 2, the ferrite core 4 can be protected by the cap 2, and thus damage to the ferrite core 4 can be suppressed.

In addition, in the present embodiment, the ferrite core 4 can be easily attached to the cap 2 by providing the holder 5.

In the present embodiment, since the mounting portion 52 is formed on the inner edge portion on one surface side of the plate portion 51 and the holding portion 53 is formed on the outer edge portion on the other surface side of the plate portion 51, the ferrite core 4 can be appropriately mounted on the cap 2 by the mounting portion 52 while holding the ferrite core 4 by the holding portion 53. Thereby, regardless of the posture of the assembly work, it is possible to suppress the breakage of the ferrite core 4 caused by the falling or falling of the ferrite core 4 from the cap 2. In addition, the offset load between the cap 2 and the ferrite core 4 can be reduced, and the sliding friction during rotation of the cap 2 can be reduced. Further, since the holder 5 is formed of a thin plate-like material, the cable terminal 100 can be prevented from being enlarged.

In the present embodiment, the mounting portion 52 is formed in a snap-fit structure, whereby the holder 5 can be easily attached to and detached from the cap 2. Further, the holding portion 53 is formed in a snap-fit structure, whereby the ferrite core 4 can be easily attached to and detached from the holder 5. Further, the impedance characteristics can be changed by changing the material and shape of the ferrite core 4 (for example, the opening area of the hollow portion).

Other embodiments

The embodiments disclosed herein are all examples, and are not intended to be construed as limiting. Therefore, the technical scope of the present invention is defined not by the above-described embodiments but by the claims. The technical scope of the present invention includes the meaning equivalent to the claims and all modifications within the scope.

For example, in the above-described embodiment, the present invention is applied to the cable connector 100 that fixes the cable 150 that is the power cable connecting the motor and the inverter, but the present invention is not limited to this, and the present invention may be applied to a cable connector that fixes a cable other than the power cable connecting the motor and the inverter.

In the above embodiment, the example in which the present invention is applied to the cable connector 100 in which the cable 150 is fixed to the case 160 that is the inverter case is shown, but the present invention is not limited to this, and the present invention may be applied to a cable connector in which a cable is fixed to a case other than the inverter case.

In addition, in the above-described embodiment, an example in which six mounting portions 52 are provided is shown, but the number of the mounting portions may be any number. Likewise, an example is shown in which six holding portions 53 are provided, but the number of holding portions may be any number.

Industrial applicability

The present invention can be used for a cable connector for mounting a cable to a housing.

Description of the reference numerals

1: a connector body;

2: a cap;

3: a sleeve;

4: a ferrite core;

5: a holder (mounting member);

11: a main body portion;

12: a flange portion;

13: an external threaded portion;

21: a side peripheral wall portion;

22: a top wall portion;

23: an insertion hole (first insertion hole);

24: an internal thread portion;

51: a plate portion;

51 a: an insertion hole (second insertion hole);

52: an installation part;

53: a holding section;

100: a cable joint;

150: a cable;

160: a housing.

Claims

1. A cable connector for mounting a cable to a housing,

the cable connector includes a connector main body attachable to the housing, a cap fastened to the connector main body, a sleeve press-fitted between the connector main body and the cable, and a ferrite core for reducing noise of the cable,

the ferrite core is mounted on the cap.

2. The cable fitting of claim 1,

the cap includes a cylindrical side peripheral wall portion and a top wall portion formed at one end of the side peripheral wall portion,

a first insertion hole through which the cable is inserted is formed in the top wall portion,

an internal thread portion is formed on the inner peripheral surface of the side peripheral wall portion on the other end portion side,

the ferrite core is formed in an annular shape so as to allow the cable to be inserted therethrough, and is disposed between the top wall portion and the internal thread portion in the side peripheral wall portion of the cap.

3. The cable fitting of claim 2,

the cable connector includes a mounting member for mounting the ferrite core to the cap.

4. The cable fitting of claim 3,

the mounting member includes a circular plate portion having a second insertion hole through which the cable is inserted, a mounting portion disposed on one surface side of the plate portion, and a holding portion disposed on the other surface side of the plate portion,

the mounting portion is formed on an inner edge portion of the plate portion and mounted to the cap,

the holding portion is formed at an outer edge portion of the plate portion and configured to hold the ferrite core.

5. The cable fitting of claim 4,

the mounting portion has a snap-fit structure and is configured to be fitted into the first insertion hole of the top wall portion of the cap.

6. Cable joint according to claim 4 or 5,

the holding portion has a snap-fit structure and is configured to hold the ferrite core from an outer peripheral surface side.

7. Cable joint according to any one of claims 2 to 6,

the joint body includes a cylindrical body portion through which the cable is inserted and a flange portion extending outward from the other end portion of the body portion,

the flange portion is configured to be attachable to the housing,

an external thread part screwed with the internal thread part is formed on the outer peripheral surface of the main body part,

the sleeve is formed in a cylindrical shape so that the cable can be inserted therethrough,

by fastening the cap to the joint main body, the sleeve is pressed by the ferrite core, thereby pressing the sleeve between the main body and the cable.