WO2020084857A1

WO2020084857A1 - Mounting member

Info

Publication number: WO2020084857A1
Application number: PCT/JP2019/030440
Authority: WO
Inventors: 拓也谷上; 康夫森
Original assignee: 星和電機株式会社
Priority date: 2018-10-22
Filing date: 2019-08-02
Publication date: 2020-04-30
Also published as: CN112805895A; TW202021221A; CN112805895B; JP6568287B1; JP2020068557A

Abstract

[Problem] To provide a mounting member which enables a ferrite core to be appropriately mounted to a ferrite core. [Solution] A holder 5 is for mounting a ferrite core 4 to a cap 2 of a cable ground 100. The cap 2 comprises: a cylindrical side circumferential wall portion 21; and a top wall 22 formed at one end of the side circumferential wall portion 21. A through hole 23 through which a cable 150 is passed is formed in the top wall 22. The holder 5 comprises: a circular plate portion 51 having a through hole 51a through which a cable 150 is passed; a mounting portion 52 positioned on one side of the plate portion 51 and mounted to the cap 2; and a holding portion 53 positioned on the other side of the plate portion 51 and which holds the ferrite core 4. The mounting portion 52 is formed on the inner rim of the plate portion 51 and the holding portion 53 is formed on the outer rim of the plate portion 51.

Description

Mounting member

The present invention relates to a mounting member.

Conventionally, a cable gland for attaching a cable to a case is known (for example, see Patent Documents 1 and 2).

The cable gland of Patent Document 1 includes a gland body that can be attached to a case, a cap that is fastened to the gland body, and a sleeve that is press-fitted between the gland body and the cable when the cap is fastened. In this cable gland, since the gap between the gland body and the cable is filled with the sleeve, it is possible to prevent foreign matter (for example, water, oil, and dust) from entering the case.

The cable gland of Patent Document 2 is formed in a cylindrical shape, a fixing screw portion is formed on the outer peripheral surface, and a ferrite core is attached to the inner peripheral surface. The ferrite core has a hole through which the cable is inserted. In this cable gland, the ferrite core can reduce the noise of the cable.

JP, 2008-98828, A Japanese Patent Laid-Open No. 2002-171612

Here, the above Patent Document 2 does not describe the mounting structure of the ferrite core to the cable gland, and there is room for improvement. For example, if the ferrite core falls off the cable gland, the ferrite core may be damaged.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a mounting member capable of properly mounting a ferrite core on a cap.

The mounting member according to the present invention is for mounting the ferrite core on the cap of the cable gland. The cap includes a cylindrical side peripheral wall portion and a top wall portion formed at one end of the side peripheral wall portion, and a first insertion hole through which a cable is inserted is formed in the top wall portion. The mounting member is a circular plate portion having a second insertion hole through which the cable is inserted, is disposed on one surface side of the plate portion, is attached to the cap, and is disposed on the other surface side of the plate portion. And a holding unit that holds the core. The attachment portion is formed on the inner edge portion of the plate portion, and the holding portion is formed on the outer edge portion of the plate portion.

With this configuration, it is possible to attach the ferrite core to the cap with the attachment portion while holding the ferrite core with the holding portion.

In the above mounting member, the mounting portion may have a snap-fit structure, and may be configured to be fitted into the first insertion hole of the top wall portion of the cap.

In the above mounting member, the holding portion may have a snap-fit structure and may be configured to hold the ferrite core from the outer peripheral surface side.

According to the mounting member of the present invention, the ferrite core can be properly mounted on the cap.

It is the perspective view which showed the cable gland by this embodiment. It is an exploded perspective view showing the cable gland of FIG. It is sectional drawing which showed the state which the cable gland of FIG. 1 has fixed the cable to the case. It is the perspective view which showed the cap of the cable gland of FIG. It is the perspective view which showed the holder of the cable gland of FIG. 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 where the holder of FIG. 6 is attached to a cap.

An embodiment of the present invention will be described below with reference to the drawings.

First, the structure of the cable gland 100 including the holder 5 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 7.

The cable gland 100 is provided for attaching the cable 150 to the case 160, as shown in FIG. The cable gland 100 is configured to fix the cable 150 inserted through the insertion hole 161 of the case 160 to the case 160. For example, the cable 150 is a power cable that connects a motor and an inverter (not shown), and the case 160 is an inverter case that houses the inverter. The side where the cable gland 100 is attached to the case 160 (X1 direction side) is the outside of the case 160, and the opposite side (X2 direction side) is the inside of the case 160.

As shown in FIG. 2, the cable gland 100 includes a gland 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" in the present invention.

[Grand body]
The ground body 1 is configured to be attachable to the case 160. This gland main body 1 is made of resin, for example, and has a cylindrical main body portion 11 through which the cable 150 is inserted, and a flange portion 12 that projects outward from the other end portion (end portion on the X2 direction side) of the main body portion 11. Is included. A male screw portion 13 with which the cap 2 is screwed is formed on the outer peripheral surface of the main 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 on the inner peripheral surface of the main body portion 11 so as to be continuous with each other. The large diameter portion 14a is arranged on one side (X1 direction side), the small diameter portion 14c is arranged on the other side (X2 direction side), and the reduced diameter portion 14b is arranged between the large diameter portion 14a and the small diameter portion 14c. There is. The reduced diameter portion 14b is formed so that the opening diameter gradually decreases toward the flange portion 12 side (X2 direction side).

The flange portion 12 is configured to be attachable to the case 160, and when the flange portion 12 is attached to the case 160, the small diameter portion 14c is fitted in the insertion hole 161 of the case 160. A bolt insertion hole 15 is formed in the flange portion 12 and a bolt insertion hole 162 is formed in the case 160, and a bolt (not shown) inserted in the

bolt insertion holes

15 and 162 is fastened. Thus, the flange portion 12 is attached to the case 160.

[cap]
The cap 2 is configured so that it can be fastened to the gland body 1. The cap 2 is made of resin, for example, and as shown in FIG. 4, a cylindrical side peripheral wall portion 21 and a top wall portion formed at one end portion (end portion on the X1 direction side) of the side peripheral wall portion 21. 22 and 22 are included. The top wall portion 22 has 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 side (X2 direction side) of the inner peripheral surface of the side peripheral wall portion 21. Further, the cap 2 is provided with an accommodating portion 25 in which the ferrite core 4 is accommodated between the top 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" in the present invention.

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

[Ferrite core]
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 vulnerable to impact and is formed into 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 housed in the housing portion 25 of the cap 2.

[holder]
The holder 5 is provided to attach the ferrite core 4 to the cap 2, as shown in FIG. 7. 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 material. The holder 5 is made of resin, for example, and includes a plate portion 51, a mounting portion 52, and a holding portion 53, as shown in FIG.

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 arranged on one surface side (X1 direction side) of the plate portion 51, and the holding portion 53 is arranged on the other surface side (X2 direction side) of the plate portion 51. The insertion hole 51a is an example of the "second insertion hole" in the present invention.

The attachment part 52 is configured to be attached to the cap 2. The mounting portions 52 are formed on the inner edge portion of the plate portion 51, and a plurality of mounting portions 52 are provided at predetermined intervals in the circumferential direction. That is, the plurality of mounting portions 52 are arranged in a circle so as to surround the insertion hole 51a. For example, the six mounting portions 52 are arranged at intervals of 60 degrees. Each of the mounting portions 52 has a pair of arm portions 521 extending from the plate portion 51 to one side (X1 direction side), a coupling portion 522 that couples the tips of the pair of arm portions 521, and a radial outward direction protruding from the coupling portion 522. And a claw portion 523 that operates. The arm portion 521 is configured to be elastically deformable in the radial direction. As shown in FIG. 1, the claw portion 523 is adapted to be engaged with the outer surface (the 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.

The holding portion 53 is configured to hold the ferrite core 4, as shown in FIG. The holding portions 53 are formed on the outer edge of the plate portion 51, and a plurality of holding portions 53 are provided at predetermined intervals in the circumferential direction. That is, the plurality of holding portions 53 are arranged in a circle so as to surround the plate portion 51. The holding portions 53 are arranged so as to be displaced in the circumferential direction with respect to the mounting portions 52, and the mounting portions 52 and the holding portions 53 are alternately arranged in the circumferential direction. For example, the six holding portions 53 are arranged at intervals of 60 degrees, and the holding portions 53 are displaced from the mounting portion 52 by 30 degrees. Each holding portion 53 has a pair of arm portions 531 extending from the plate portion 51 to the other side (X2 direction side), a connecting portion 532 that connects the tips of the pair of arm portions 531, and projects radially inward from the connecting portion 532. And a claw portion 533 that operates. The arm portion 531 is configured to be elastically deformable in the radial direction. The claw portion 533 is adapted to be engaged with the other surface (the 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.

-Cable gland assembly method-
Next, a method of assembling the cable gland 100 according to the present embodiment will be described with reference to FIGS. 1 to 7.

First, the ground body 1 (see FIG. 3) is attached to the case 160 (see FIG. 3). Specifically, the flange portion 12 of the ground body 1 is attached to the case 160 by fastening bolts (not shown) inserted into the bolt insertion hole 15 of the ground body 1 and the bolt insertion hole 162 of the case 160. . At this time, the small-diameter portion 14c of the gland body 1 is fitted into the insertion hole 161 of the case 160, and the internal space of the gland body 1 communicates with the inside of the case 160 via the insertion hole 161.

Further, as shown in FIG. 6, the holding portion 53 of the holder 5 holds the ferrite core 4. Specifically, by elastically deforming the arm portion 531 (see FIG. 5) of the holding portion 53 to the outside in the radial direction, the ferrite core 4 is moved to the plate portion 51 side with the claw portion 533 of the holding portion 53 being released. Pushed in. Then, when the ferrite core 4 is pushed in until it comes into contact with the plate portion 51, the arm portion 531 returns to the original position, and the claw portion 533 is engaged with the other surface (the surface on the X2 direction side) of the ferrite core 4. . Therefore, the holding portion 53 holds the ferrite core 4. When 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 portion 533 in the thickness direction, and the outer peripheral surface of the ferrite core 4 is surrounded by the arm portion 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 inner peripheral surface of the insertion hole 23 causes the claw portion 523 to be radially inward. The arm portion 521 is elastically deformed by being pushed by. Then, when the claw portion 523 leaves the insertion hole 23, the arm portion 521 returns to the original position, and the claw portion 523 is engaged 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 mounting portion 52 is mounted on the cap 2, the arm portion 521 is inserted into the insertion hole 23, and the top wall portion 22 is sandwiched between the plate portion 51 and the claw portion 523. That is, the arm portion 521 is arranged along the inner peripheral surface of the insertion hole 23, and the plate portion 51 is arranged along the inner surface (the surface on the X2 direction side) of the top wall portion 22. Further, the arm portion 531 of the holder 5 is arranged along the inner surface of the side peripheral wall portion 21 of the cap 2.

In this way, the ferrite core 4 is attached to the cap 2 by the holder 5. The ferrite core 4 attached to the cap 2 is housed in the housing portion 25 (see FIG. 4) of the cap 2.

Then, the cable 150 (see FIG. 3) is inserted through the insertion hole 161 of the case 160 and the main body portion 11 of the gland main body 1, and the sleeve 3 and the cap 2 are inserted through the cable 150. Since the ferrite core 4 is attached to the cap 2 via the holder 5, the cable 150 is inserted into the insertion hole 23 of the cap 2, the insertion hole 51 a 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 gland body 1 with the sleeve 3 fitted to the body portion 11 of the gland body 1. At this time, the sleeve 3 is pressed toward the flange 12 side (X2 direction side) by the ferrite core 4 in the cap 2. Therefore, the sleeve 3 is pushed between the reduced diameter portion 14b of the gland body 1 and the cable 150, and the sleeve 3 is elastically deformed and press-fitted. Therefore, the sleeve 3 fills the gap between the gland body 1 and the cable 150, so that foreign matter (for example, water, oil, and dust) is prevented from entering the case 160. Further, since the ferrite core 4 is pressed against the top wall portion 22 side of the cap 2 by the repulsive force of the sleeve 3, the position of the ferrite core 4 in the cap 2 is stabilized. The tightening amount of the cap 2 is adjusted according to, for example, the diameter of the cable 150. Further, when the cap 2 is fastened to the gland body 1, the top wall portion 22 of the cap 2 slides on the plate portion 51 of the holder 5.

-effect-
In the present embodiment, as described above, the attachment portion 52 is formed on the inner edge portion on the 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, thereby holding the plate portion 51. Since the ferrite core 4 is held by the portion 53 and attached to the cap 2 by the attaching portion 52, the ferrite core 4 can be properly attached to the cap 2. As a result, regardless of the posture of the assembling work, it is possible to prevent the ferrite core 4 from being damaged by being dropped or dropped from the cap 2. Further, it is possible to reduce an unbalanced load between the cap 2 and the ferrite core 4 and reduce sliding friction when the cap 2 rotates. Further, since the holder 5 is made of a thin plate-shaped material, it is possible to prevent the cable gland 100 from increasing in size.

Further, in the present embodiment, the holder 5 can be easily attached to and detached from the cap 2 because the mounting portion 52 has the snap-fit structure. Further, since the holding portion 53 has the snap fit structure, the ferrite core 4 can be easily attached to and detached from the holder 5. Then, the impedance characteristic 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 embodiment disclosed this time is an example in all respects, and is not a basis for a limited interpretation. Therefore, the technical scope of the present invention should not be construed only by the above-described embodiments, but should be defined based on the claims. Further, the technical scope of the present invention includes meanings equivalent to the scope of the claims and all modifications within the scope.

For example, in the above embodiment, an example in which the present invention is applied to the cable gland 100 that fixes the cable 150 that is a power cable that connects the motor and the inverter is shown, but the invention is not limited to this, and the motor and the inverter are connected. The present invention may be applied to a cable gland for fixing cables other than power cables.

Further, in the above-described embodiment, the example in which the present invention is applied to the cable gland 100 that fixes the cable 150 to the case 160 that is the inverter case is not limited to this, and the cable that fixes the cable to a case other than the inverter case is not limited to this. The present invention may be applied to the ground.

Further, in the above embodiment, an example in which the six mounting portions 52 are provided has been shown, but the number of mounting portions is not limited to this and may be any number. Similarly, an example in which six holding portions 53 are provided has been shown, but the number of holding portions is not limited to this and may be any number.

The present invention can be used as a mounting member for mounting a ferrite core on a cable gland cap.

2 Cap 4 Ferrite core 5 Holder (mounting member)
21 Side peripheral wall part 22 Top wall part 23 Insertion hole (first insertion hole)
51 plate portion 51a insertion hole (second insertion hole)
52 Mounting part 53 Holding part 100 Cable gland 150 Cable

Claims

A mounting member for mounting the ferrite core on the cable gland cap,
The cap includes a cylindrical side peripheral wall portion and a top wall portion formed at one end of the side peripheral wall portion, and a first insertion hole through which a cable is inserted is formed in the top wall portion. ,
A circular plate portion having a second insertion hole through which the cable is inserted;
An attachment portion arranged on one surface side of the plate portion and attached to the cap,
A holding portion arranged on the other surface side of the plate portion and holding the ferrite core,
The mounting portion is formed on an inner edge portion of the plate portion,
The attachment member is characterized in that the holding portion is formed on an outer edge portion of the plate portion.
The mounting member according to claim 1,
The mounting member has a snap-fit structure and is configured to be fitted into the first insertion hole of the top wall portion of the cap.
The mounting member according to claim 1 or 2,
The holding member has a snap-fit structure and is configured to hold the ferrite core from the outer peripheral surface side.