JPH0689832A - Fixing device for electrolytic capacitor - Google Patents

Abstract

PURPOSE:To acquire a fixing device of an electrolytic capacitor whose fixing strength and aseismatic capacity are improved by holding a compressed elastic ring inserted in a body. CONSTITUTION:This device is provided with a circular body 10 fitting to a body part of an electrolytic capacitor 2 to be fixed, an elastic ring 20 inserted between a tapered surface 14 formed in an inner peripheral surface of a member (chassis) 8 to be fixed to make the electrolytic capacitor 2 pass through or the circular body 10, and the body part of the electrolytic capacitor 2 and a fixing cover 30 fixed to the member 8 covering the circular body 10 and holds the elastic ring 20 compressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device for an electrolytic capacitor used on a moving object such as a train which is accompanied by vibration.

[0002]

2. Description of the Related Art An electrolytic capacitor is roughly classified into one in which an electrode terminal of the electrolytic capacitor is also used as a fixing device and one in which another member is attached to the electrolytic capacitor to form a fixing device. When the electrode terminal is also used as a fixing device, a small and lightweight one has sufficient earthquake resistance, but the stress applied to the electrolytic capacitor has a large effect on the electrode terminal, so it is not suitable for fixing a large electrolytic capacitor. And is dangerous. Further, in a fixing device that is a member separate from the electrolytic capacitor, there are problems such as fixing strength, easiness of handling, versatility, reliability, and manufacturing cost.

[0003]

Conventionally, the related arts of fixing devices for electrolytic capacitors are known in Japanese Utility Model Publication No. 34-7546 “Electric field storage device”, Japanese Utility Model Publication No. 49-38769 “Electrical component mounting device” and Japanese Utility Model Publication No. No. 52-169046 “Parts mounting device”, No. 60-59523 “Suitable tool for electrolytic capacitor”, etc. can be used.

An overview of these technologies from the viewpoint of seismic resistance, versatility, and ease of handling, etc.
No. 7546 "Electric field storage device" uses an annular metal fitting to fix the electrolytic capacitor, which is simple, but it is a technology that uses a large diameter part of the electrolytic capacitor. Not suitable for fixing capacitors.

Next, in Japanese Utility Model Publication No. 49-38769, "Electrical Component Mounting Device", a structure is used in which a capacitor case is installed on a mounting base, a cover is placed on the mounting case, and the cover and the mounting base are screwed together. However, such a fixing device also has an indispensable relationship with the mounting base, and thus lacks versatility.

[0006] Japanese Utility Model Laid-Open No. 52-169046 "Parts Mounting Device" uses a fixing band and is fixed to the cut-and-raised piece of the chassis, but the strength of the cut-and-raised piece is electrolytic. It affects the support of capacitors and is not suitable for fixing large electrolytic capacitors. In addition, since it is necessary to perform tightening and fixing of the band in separate steps, the ease of handling is impaired, and the protruding portion of the fixed portion of the band may also reduce the mounting efficiency of components.

In Japanese Utility Model Laid-Open No. 60-59523 “Electrolytic Capacitor Mounting Tool”, the electrode terminal of the electrolytic capacitor is used as a fixing means, and an elastic member is interposed between the chassis and the electrolytic capacitor to fix them. In such a fixing structure, an impact force applied to the chassis may be applied to the electrode terminals, which may reduce reliability such as deterioration of airtightness of the electrolytic capacitor.

As described above, although there are various types of techniques relating to the electrolytic capacitor fixing device, there are problems in relation to the form of the electrolytic capacitor, the form of the member to be fixed, the seismic strength, etc. From the viewpoint of reliability, it cannot be used for fixing an electrolytic capacitor used for a power supply of an object or a control device.

Therefore, an object of the present invention is to provide a fixing device for an electrolytic capacitor in which the fixing strength of the electrolytic capacitor is increased and the vibration resistance is improved.

[0010]

A fixing device for an electrolytic capacitor according to the present invention has an annular body (10) fitted to the body of an electrolytic capacitor (2) to be fixed, as illustrated in FIG. 1 or 7. And an elastic ring that is sandwiched between a fixed member (chassis 8) that penetrates the electrolytic capacitor or a tapered surface (14, 16) formed on the inner peripheral surface of the annular body and the body of the electrolytic capacitor. 20) and a fixed cover (30) which covers the annular body and is fixed to a fixed member and holds the elastic ring in a compressed state.

Further, the electrolytic capacitor fixing device of the present invention comprises first and second annular bodies (10, 12) fitted to the body of the electrolytic capacitor (2) to be fixed, and these first and second annular bodies.
And an elastic ring (20) sandwiched between the tapered surface (14, 16) formed on the inner peripheral surface of at least one of the second annular body and the body of the electrolytic capacitor, and the first and the second. A fixed cover (30) which covers the second annular body and is fixed to a fixed member (chassis 8) and holds the elastic ring in a compressed state is provided.

Further, in the electrolytic capacitor fixing device of the present invention, a concave portion (5) is formed on the body of the electrolytic capacitor to be fixed.
6) may be formed, and the elastic ring may be fitted into the recess.

[0013]

The electrolytic capacitor fixing device of the present invention uses the elastic ring as a part of the fixing element of the electrolytic capacitor to be fixed to the member to be fixed such as the chassis, and fixes the deformation and frictional force due to the compression. I am trying. Therefore, as a means for compressing and deforming the elastic ring, a tapered surface is formed on the annular body or the fixed member, the deformation and the pressing direction are restricted by the tapered surface, and the pressing force is held by the fixed cover.

In the electrolytic capacitor fixing device of the present invention as defined in claim 2, since the tapered surfaces formed on the first and second annular bodies are inclined surfaces toward the electrolytic capacitor side, both A space having a substantially triangular cross section is formed therebetween. An elastic ring is inserted into this space and sandwiched between the tapered surfaces. And the first and second
The annular body is covered, and a part of it is fixed to the fixed member side.
That is, when a pressure is applied between the tapered surfaces, the elastic ring is deformed into a space shape between the tapered surfaces while being compressed by the pressure, and a pressure contact state is formed between the inner wall surfaces thereof. If the fixed cover is mechanically fixed to the fixed member with a strength that overcomes the restoring force of the elastic ring, the electrolytic capacitor is fixed by the elastic ring and the fixed cover enclosed in the first and second annular bodies. It is firmly and elastically fixed to the member. In this case, a large frictional force that overcomes stress such as vibration acts between the elastic ring and the electrolytic capacitor in a compressed state, so that there is no inconvenience due to loosening of screws such as a fixing band.

Such a fixed state is irrelevant to the electrode terminals, and if the fixed portion is set at the position of the center of gravity of the electrolytic capacitor, the fixability and stability will be higher. In addition, since the elastic ring is interposed, even if the fixed member side receives vibration, the vibration is alleviated, so that the influence on the electrolytic capacitor can be avoided.

Further, in the electrolytic capacitor fixing device according to the third aspect of the present invention, the concave portion is formed in the body of the electrolytic capacitor to be fixed, and the elastic ring is fitted into the concave portion to fix the electrolytic capacitor. It is possible to stabilize the fixed state while facilitating the setting of the position.

[0017]

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

FIG. 1 shows an embodiment of the electrolytic capacitor fixing device of the present invention. The electrolytic capacitor 2 fixed by the fixing device of this embodiment is relatively large, but the present invention is not limited to a large electrolytic capacitor. The electrolytic capacitor 2 is provided with electrode terminals 4 and 6 for connection with an external circuit. A chassis 8 made of metal, synthetic resin or the like is used as an example of a member to be fixed to which the electrolytic capacitor 2 is fixed.

The fixing device is provided with first and second annular bodies 10 and 12 having an inner diameter corresponding to the outer diameter of the electrolytic capacitor 2 to be fixed. Each of the annular bodies 10 and 12 is made of a material that is lightweight and has mechanical strength, that is, synthetic resin is integrally molded in this embodiment, but may be formed of aluminum alloy or the like. Then, the taper surfaces 14, 16 facing the electrolytic capacitor 2 side are provided on the opposed surface portions of the respective annular bodies 10, 12.
Are formed. An elastic ring 20 formed of an elastic material such as rubber having appropriate elasticity is installed in the space 18 formed by the tapered surfaces 14 and 16.

The large diameter portion 2 is provided in each of the annular bodies 10 and 12.
Small diameter portions 26 and 28 are formed by providing steps 2 and 24. The small diameter portions 26, 28 are formed with an appropriate width according to the electrolytic capacitor 2 to be fixed, surround the body of the electrolytic capacitor 2, and contribute to increase the fixing strength.

A fixed cover 30 is installed as a means for fixing the annular bodies 10 and 12 to the chassis 8.
The large-diameter portion 24 on the annular body 10 side has a sufficient thickness,
The step 32 is used for mechanically connecting the fixed cover 30. Side plates 36 are formed on the fixed cover 30 at the side portions required to balance the planar shape of the octagonal fixed plate 34 that covers the stepped portion 32 side of the annular body 10, for example. A fixing piece 40 for penetrating the fixing hole 38 of the chassis 8 is formed on each of the fixing pieces 40, and a through hole 41 is formed on each fixing piece 40 for convenience of processing. In this embodiment, after the fixing piece 40 penetrates the fixing hole 38 of the chassis 8, it is prevented from coming off from the chassis 8 by swirling around 90 degrees.

Next, each component will be described in detail. FIG. 2 shows details of the annular bodies 10 and 12 and the elastic ring 20. On the inner surface portion of the annular body 10, a tapered surface 14 is formed which is continuous from the small diameter portion 26 and has a large diameter at a constant angle.
The taper surface 14 is formed up to about the middle of the large diameter portion 22,
The lower portion is formed with a fitting portion 42 having a larger wall thickness than the small diameter portion 26 and having the same diameter. On the other hand, the large-diameter portion 24 on the side of the annular body 12 is formed with a step portion 46 on the periphery thereof, together with an insertion portion 44 that is inserted into the fitting portion 42 on the side of the annular body 10. Therefore, the connection between the two is made by the fitting portion 42 and the insertion portion 4
4 and the stepped portion 46 to prevent the displacement in the plane direction. In such a connected state, since the inner surfaces of the fitting portion 42 are added in addition to the tapered surfaces 14 and 16 of the annular bodies 10 and 12, the cross-sectional shape of the space portion 18 is roughly triangular, to be precise. , An irregular pentagon. And
The elastic ring 20 confined in the space 18 is an O-ring having a perfect circular cross section.

Further, as shown in FIG. 3, the chassis 8 has a flat plate shape, and a circular through hole 48 necessary for penetrating the electrolytic capacitor 2 to be fixed is formed in the chassis 8 and A thin fixing hole 38 through which the fixing piece 40 of the fixing cover 30 can penetrate is formed in the cross direction of the through hole 48.

A through hole 50 for allowing the small diameter portion 26 of the annular body 10 to penetrate is formed at the center of the octagonal fixing plate 34 of the fixing cover 30. Also, the fixing plate 3
The side plates 36 and the bent portions 52 are alternately formed on each side portion of the No. 4, and the bent portions 52 are for increasing the mechanical strength of the fixed plate 34. Can be made thinner and lighter weight can be expected.

Next, a method of fixing the electrolytic capacitor 2 will be described. As shown in FIG. 4, the annular capacitors 10, 12, the elastic ring 20, and the fixed cover 30 are attached to the electrolytic capacitor 2 to be fixed.
After mounting, the elastic ring 20 is positioned corresponding to the fixed position of the capacitor 2, the annular body 12 is placed along this elastic ring 20, and then the electrolytic capacitor 2 is put into the chassis 8.

The annular body 10 is slid so as to cover the elastic ring 20, and the fixed cover 30 is positioned thereon.
The fixed cover 30 is rotated, and the fixed piece 40 is inserted in alignment with the fixed hole 38 of the chassis 8. Then, the fixing piece 40 is pulled out from the fixing hole 38 to the rear surface side of the chassis 8, and the through hole 41 portion is exposed to the rear surface side of the chassis 8.

As shown in FIG. 5 (A), the tip of the fixing piece 40 projecting to the rear side of the chassis 8 is adjusted by using an adjusting tool 54 such as a driver having a U-shaped tip portion. Hook the part and swivel about 90 degrees to fix the fixed piece 4
0 is deformed on the back side of the chassis 8. In this case, the turning of the adjusting tool 54 is performed by the arrow P on the fixing plate 34 of the fixing cover 30.
The pressure is applied in the direction indicated by, and the adjustment tool 54 side is indicated by the arrow T.
While pulling in the direction indicated by. As a result, as shown in FIG. 5B, the annular bodies 10 and 12 are joined and the distance between the two is narrowed. As a result, the elastic ring 20 is confined in the state of being compressed in the shape of the space 18, and A restoring force is applied between the annular bodies 10 and 12.

As described above, by fixing the fixed cover 30 to the chassis 8, the elastic ring 20 is compressed through the annular bodies 10 and 12 and pressed against the peripheral surface portion of the electrolytic capacitor 2. As a result, the electrolytic capacitor 2 is chassis. 8 is firmly and elastically fixed, and a fixed state with sufficient earthquake resistance is obtained.

In the embodiment, the fixing cover 30 is fixed to the chassis 8 with the fixing piece 40.
This is advantageous in that the fixing process is simple and contributes to the reduction of the number of fixing parts. However, as the fixing means, a fixing means such as a screw and a nut or welding may be used.

In the embodiment, the electrolytic capacitor 2 having a flat body has been described as an example. However, as shown in FIG. 6, if a recess 56 for fixing the elastic ring 20 is formed, the electrolytic capacitor 2 can be formed. The fixed position is fixed, and the anti-slip effect can be expected, and the reliability of the fixed state can be further enhanced. The concave portion 56 may be formed at several positions on the body of the electrolytic capacitor 2, and in that case, the fixing position can be arbitrarily selected.

Further, the recess 56 for fixing formed on the electrolytic capacitor 2 includes the elastic ring 20, the annular body 10,
A recess corresponding to 12 may be used, and a recess or the like of the stopper is also effective.

Next, FIG. 7 shows another embodiment of the electrolytic capacitor fixing device of the present invention. In the above embodiment,
Since the tapered surfaces 14 and 16 are formed on both the annular bodies 10 and 12, the deformation space of the elastic ring 20 is enlarged, and the contact area between the elastic ring 20 and the body of the electrolytic capacitor 2 is enlarged. There is an advantage that can be done, for example,
As shown in FIG. 7A, the electrolytic capacitor 2 can be fixed to the chassis 8 even when the tapered surface 14 is formed only on the annular body 10 side and the other annular body 12 side is a flat surface. .

When the tapered surface 14 is selectively formed as described above, it may be provided on either side of the annular bodies 10 and 12 to be formed, and as shown in FIG. The tapered surface 16 may be formed on the side, and the facing surface on the other annular body 10 side may be a flat surface. In this case, the annular bodies 10, 12
The relationship between the fitting portion 42 and the stepped portion 46 as a means for coupling the two may be relatively determined, and as shown in this modification,
Even if the fitting portion 43 is formed on the side of the annular body 12 and the step portion 47 corresponding to the fitting portion 43 is formed on the side of the annular body 10, the strength and accuracy of the connection between the two will not be impaired.

Since the fixing device of the electrolytic capacitor of the present invention uses the pressure contact by the deformation of the elastic ring 20 under the pressure condition as a fixing principle, as shown in FIG. 7C, the annular body 12 is attached to the chassis. It is also possible that the ring member 12 is also used and the annular member 12 is omitted in terms of the configuration. By doing so, the number of parts can be reduced by omitting the annular body 12.

Further, as shown in FIG. 7D, when the chassis 8 as the member to be fixed can have a sufficient thickness, the chassis 8 has a tapered surface toward the body of the electrolytic capacitor 2. 17 may be formed and the annular body 10 without the tapered surface 14 may be used.

[0036]

As described above, according to the present invention,
Since the fixing strength of the electrolytic capacitor is increased and the fixed state is elastic due to the interposition of the elastic ring, it is possible to improve the seismic resistance, and it is used for a vibrating object such as a train to prevent the fixing reliability and the deterioration of electrical characteristics. it can.

Further, since the recess for fixing the elastic ring is formed in the body of the electrolytic capacitor, the fixing position of the elastic ring can be made uniform and the fixing strength can be further enhanced.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a fixing device for an electrolytic capacitor of the present invention.

2 is a perspective view showing an annular body and an elastic ring in one embodiment of the electrolytic capacitor fixing device shown in FIG. 1. FIG.

3 is a perspective view showing a fixed cover and a chassis in an embodiment of the electrolytic capacitor fixing device shown in FIG. 1. FIG.

FIG. 4 is a sectional view showing the fixing device for the electrolytic capacitor shown in FIG. 1 before being fixed.

5 is a cross-sectional view showing a fixing method of the fixing device for the electrolytic capacitor shown in FIG.

FIG. 6 is a cross-sectional view showing another embodiment of the electrolytic capacitor fixing device of the present invention.

FIG. 7 is a cross-sectional view showing another embodiment of the electrolytic capacitor fixing device of the present invention.

[Explanation of symbols]

 2 Electrolytic Capacitor 10 First Annular Body 12 Second Annular Body 14, 16 Tapered Surface 20 Elastic Ring 30 Fixed Cover 56 Recess

Claims (3)

[Claims] 1. A ring-shaped body fitted to the body of an electrolytic capacitor to be fixed, a fixed member for penetrating the electrolytic capacitor or a tapered surface formed on the inner peripheral surface of the ring-shaped body, and a body of the electrolytic capacitor. A fixing device for an electrolytic capacitor, comprising: an elastic ring sandwiched between and, and a fixing cover that covers the annular body and is fixed to a fixed member to hold the elastic ring in a compressed state. 2. A first and second annular body fitted into a body of an electrolytic capacitor to be fixed, and a taper formed on the inner peripheral surface side of at least one of the first and second annular bodies. An elastic ring sandwiched between the surface and the body of the electrolytic capacitor; a fixed cover that covers the first and second annular bodies and is fixed to a fixed member to hold the elastic ring in a compressed state; A fixing device for an electrolytic capacitor, comprising: 3. The fixing device for an electrolytic capacitor according to claim 1, wherein a recess is formed in the body of the electrolytic capacitor, and the elastic ring is fitted in the recess.