JPH0620027B2 - Electrolytic capacitor mounting structure - Google Patents

Description

The present invention relates to a mounting structure for an electrolytic capacitor.

[Conventional technology]

Conventionally, for large electrolytic capacitors, for example,
As shown in Fig. 4 of "-107980" Packaging box for electrolytic capacitor ", a mounting band is provided around the outer case as a means for mounting the electrolytic capacitor itself on a member to be mounted. Therefore, when an electrolytic capacitor is mounted on a circuit device or the like, it is radially projected to the mounting band with respect to the chassis or the board of the circuit device or the like 2-3.
Fixing is done using point attachment pieces.

[Problems to be Solved by the Invention]

By the way, for mounting an electrolytic capacitor using such a mounting band, a mounting band that is a separate component from the electrolytic capacitor is used, and since several screws and nuts are used, the mounting structure becomes complicated, The mounting work is complicated, and moreover, there are drawbacks that the mounting efficiency of the electrolytic capacitor is low because the screwing portion projects to the side of the electrolytic capacitor and a space for the screwing work is required. Such drawbacks become remarkable in proportion to the increase in the number of electrolytic capacitors installed.

Further, as a capacitor mounting structure that does not rely on such a band, there is, for example, Japanese Utility Model Laid-Open No. 1-83324 "Capacitor mounting structure". In this example, the electrode terminals are used as the fixing means, and at the installation location where vibration or impact force is applied, the stress acts on the electrode terminals to deteriorate the performance of the electrolytic capacitor, or cause inconvenience such as damage. is there.

Therefore, it is an object of the present invention to provide a mounting structure for an electrolytic capacitor, which simplifies the mounting structure and the mounting work, and has improved earthquake resistance and mounting efficiency.

[Means for Solving the Problems]

The mounting structure of the electrolytic capacitor of the present invention has an engaging projection on the sealing plate of the outer case, the electrode terminal is led out from a region inside at least the outer periphery of the engaging projection, and the engaging projection is formed. , An electrolytic capacitor having a pedestal in the periphery thereof, a first mounting plate installed on the sealing plate side of the electrolytic capacitor and having engaging portions formed at arbitrary intervals, and a bottom surface of an outer case of the electrolytic capacitor. A second mounting plate installed on the side, and the engaging projection of the electrolytic capacitor is engaged with the engaging portion of the first mounting plate, and the first mounting plate is attached to the pedestal. And a fixing means for fixing the first and second mounting plates with the electrolytic capacitor interposed therebetween by applying the second mounting plate to the bottom surface side of the outer case of the electrolytic capacitor. It is characterized by

[Work]

In this electrolytic capacitor mounting structure, first and second mounting plates for gripping and fixing the electrolytic capacitor to be mounted are used, and the sealing plate of the electrolytic capacitor to be mounted together with the engaging projections A pedestal portion is formed in the peripheral portion. Then, on the first mounting plate, arbitrary engaging holes that engage with the engaging protrusions of the electrolytic capacitor are formed at arbitrary intervals.

Therefore, the engaging projection is inserted into the engaging hole of the first mounting plate, the pedestal is applied to the peripheral portion of the engaging hole, and the second mounting plate is applied to the bottom surface side of the outer case. To be Then, the first and second mounting plates sandwiching the electrolytic capacitor are fixed by the fixing means, and an arbitrary electrolytic capacitor is fixed and mounted between the first and second mounting plates in a sandwiched state.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

FIG. 1 shows an embodiment of a mounting structure for an electrolytic capacitor according to the present invention.

The outer case 2 is formed into a cylindrical shape by using an aluminum plate or the like, and a cylindrical capacitor element 4 is housed inside the outer case 2. Capacitor element 4
As is well known, the separator paper is sandwiched between the electrode foils on the anode side and the cathode side, and is wound in a columnar shape, and the tape 6 is wound around the periphery to prevent rewinding. Further, on the end surface of the capacitor element 4, electrode connection tabs 8 and 10 on the anode side and the cathode side connected to the wound electrode foils on the anode side and the cathode side are drawn out.

A step portion 12 having a small diameter portion is formed from the outside by a rolling process on the opening side of the outer case 2 accommodating the capacitor element 4, and a sealing plate 14 which is positioned by the step portion 12 and seals the outer case 2. Has been inserted. The sealing plate 14 is formed by molding a hard insulating plate such as a thermosetting synthetic resin into a shape that matches the opening of the outer case 2, for example, a disk shape.

The sealing plate 14 is provided with a circular flat portion 16 which is parallel to the back surface and has a circular shape. A concave portion 18 is formed around the flat portion 16 and the inner surface of the concave portion 18 has a V shape. Character-shaped ridges and the like are formed. An elastic ring 20 made of rubber or the like is fitted into the recess 18, and the opening end of the outer case 2 curved by the curling process is fitted into the elastic ring 20. Therefore,
The outer case 2 is sandwiched between the end portion of the outer case 2 and the step 12 with the elastic ring 20 interposed and the sealing plate 14 is fixed, so that the outer case 2 is sealed with sufficient airtightness. It will be.

On the flat portion 16 of the sealing plate 14, the end portion of the insulating sleeve 22 that covers the outer peripheral surface of the outer case 2 is installed. The insulating sleeve 22 has a cylindrical shape made of heat-shrinkable resin, and a protective plate 23 made of synthetic resin or the like is applied to the bottom surface side of the outer case 2 to cover the periphery thereof for protection and insulation.

Further, the flat portion 16 of the sealing plate 14 is formed with a pedestal portion 26 having a contact surface 25 which is set to be slightly higher than the curved portion 24 of the outer case 2 with a specific width, and the pedestal portion 26 is attached to the pedestal portion 26. Engagement protrusions 28 are formed for engaging the members to attach the electrolytic capacitors. The engagement protrusion 28 protrudes from the sealing plate 14, and the engagement protrusion 28 has electrode terminals 30, 3 at least in a region inside the outer periphery thereof.
2 has been derived. In this embodiment, the pedestal portion 26 is formed integrally with the sealing plate 14, so that the engaging projection 28 is integrally formed with the pedestal portion 26 on the sealing plate 14.

The anode-side and cathode-side electrode terminals 30 and 32 led out from the inside of the engagement protrusion 28 are fixed to the sealing plate 14 in a penetrating state by molding of the sealing plate 14 and have a columnar shape. A screw portion 34 for fixing the terminal screw is formed at the outer end of the case 2, and a rivet portion 36 having a smaller diameter is formed at the inner end thereof.
Therefore, the electrode connection tabs 8 and 10 of the capacitor element 4 are respectively attached to the electrode terminals 30 and 32 by the washers 38.
Are electrically connected to each other by caulking the rivet portion 36.

In addition, the engaging protrusion 28 has a thick portion where the electrode terminals 30 and 32 are led out, and the peripheral wall portion 40 is formed by the thick portion.
A recess 42 surrounded by the peripheral wall 40 is formed, and an explosion-proof valve 46 is inserted from the inner surface side of the outer case 2 into a through hole 44 formed in the recess 42.

Then, the first and second hard insulating plates, metal plates, and the like as attached members for attaching the electrolytic capacitor
The mounting plates 48 and 50 are installed. An engaging hole 52 is formed in the mounting plate 48 as an engaging portion for allowing the engaging protrusion 28 to penetrate therethrough at an arbitrary position for fixing the electrolytic capacitor.
Further, an engaging recess 54 is formed in the mounting plate 50 at a position corresponding to the engaging hole 52 so as to correspond to the bottom surface of the outer case 2. Further, each of the mounting plates 48 and 50 is formed with a plurality of through holes 58 through which bolts 56 as fixing means for fixing the both are penetrated.

Therefore, the mounting plate 50 is placed on the bottom surface side of the exterior case 2 of the electrolytic capacitor in the engaging recess 54 of the electrolytic capacitor, and the engaging projections 28 of the sealing plate 14 of the electrolytic capacitor engage the engaging holes 52 of the mounting plate 48. Then, attach the bolt 56 to each mounting plate 48, 50 with the washer 5
Insert 9 and penetrate. A nut 64 is inserted through a washer 62 into the threaded portion 60 of the bolt 56 that penetrates the mounting plate 48.
When is tightened, the electrolytic capacitor is gripped and mounted between the mounting plates 48 and 50.

With the above configuration, since the engagement protrusion 28 is formed on the sealing plate 14, the electrolytic capacitor can be attached to the attachment plate 48, which is a member to be attached, by using the engagement protrusion 28. Further, since the engagement protrusion 28 is formed, the substantial thickness of the sealing plate 14 is increased, the mechanical strength of the sealing plate 14 is increased correspondingly, and the electrode terminals 30, 32 are provided.
The airtightness between the sealing plate 14 and the sealing plate 14 can be increased. Therefore, the portion where the sealing plate 14 is inserted into the outer case 2 can be reduced, and the volume efficiency of the outer case 2 can be improved.

Then, a pedestal portion 26 having a contact surface 25 that abuts the mounting plate 48 on the sealing plate 14 is provided around the engaging protrusion 28, and the mounting plate 48 is attached to the pedestal portion 26 to mount the pedestal portion 26. A space is formed between the mounting plate 48 and the curved portion 24 of the outer case 2, so that the mounting plate 48 is attached to the outer case 2.
However, the outer case 2 can be protected from damage due to direct contact. Further, the impact force acting on the mounting plate 48 can be buffered by the pedestal portion 26, so that the protective function of the outer case 2 is enhanced and the bumper effect is obtained.

The engaging projections 28 of the sealing plate 14 are inserted into the engaging holes 52 formed in the mounting plate 48, and the bottom surface of the outer case 2 is placed in the engaging recesses 54 of the mounting plate 50. By tightening the mounting plates 48, 50 with bolts 56 and nuts 64 that are fixing means, the electrolytic capacitor is fixed and mounted between the mounting plates 48, 50 in a sandwiched state.

In the embodiment, since the engaging recess 54 is formed on the mounting plate 50 side, positioning of the electrolytic capacitor is performed by the engaging recess 54, and the electrolytic capacitor is strong together with the engaging hole 52 on the mounting plate 48 side. The mounted state is realized. By the way, when the parallelism of the mounting plates 48 and 50 is secured by tightening the bolts 56 and the nuts 64, which are fixing means, and a sufficient mounting strength is obtained, the engagement recess 54 on the mounting plate 50 side is omitted. Good.

If a sufficient elasticity is obtained by using an elastic plate for the protection plate 23, the elasticity increases the mounting strength of the electrolytic capacitor.

Then, for example, as shown in FIG. 2, if a plurality of engaging holes 52 are formed on the side of the mounting plate 48 at arbitrary intervals, the engaging protrusions 28 of the electrolytic capacitor are formed for each engaging hole 52. By engaging with each other, a plurality of electrolytic capacitors can be attached to the two attachment plates 48 and 50 in a gripped state to form a unit.

The mounting plates 48 and 50 can be firmly mounted by fixing means such as bolts 56 and nuts 64 according to the mounting strength, and by utilizing the mechanical strength of the mounting plates 48 and 50. It is possible to simplify.

In particular, since the electrolytic capacitor has the engagement protrusion 28 formed on the sealing plate 14 and is attached using the engagement protrusion 28, the electrolytic capacitor is structurally attached when the attachment band is used, or in the attachment work. There is no inconvenience, and moreover, the space between the adjacent electrolytic capacitors can be brought close to the limit allowed for heat dissipation, and the mounting efficiency can be improved.

Then, in the mounting work, after the engaging holes 52 are formed in the mounting plate 48 according to the size of the electrolytic capacitor, the mounting interval, etc., the mounting can be easily performed by using a fixing means such as several bolts 56 and nuts 64. It is possible to reduce the number of working steps.

Next, FIG. 3 shows a sealing plate of the electrolytic capacitor used in the mounting structure of the electrolytic capacitor of the present invention.

In the above-mentioned embodiment, the pedestal portion 26 is formed integrally with the sealing plate 14, but as shown in FIG. 3, the pedestal portion 27 which is annular as a separate body from the sealing plate 14 may be detachably formed.

In this case, the width of the flat portion 16 is increased so that the flat portion 16
To form an engaging protrusion 28, and the pedestal 27 is detachably installed on the engaging protrusion 28.

Then, the sealing body 1 formed of a hard member such as a hard insulating plate
On the other hand, if the pedestal portion 27 is made of a material having a relatively high elasticity, a higher bumper effect can be obtained.

If the pedestal portion 27 is formed separately from the sealing plate 14, the thickness of the pedestal portion 27 can be arbitrarily formed separately from the sealing plate 14, and the mounting height and the like can be adjusted.

In the embodiment, the mounting plates 48, 50 are used as the members to be mounted.
However, any member can be used as long as it can be attached by using the engaging projection 28, and the engaging hole 52 formed in the attaching plate 48 for attachment is also used. It may be a recess that can be engaged with the abutting portion 28.

〔The invention's effect〕

As described above, according to the present invention, the following effects can be obtained.

(a) According to the mounting structure of the electrolytic capacitor of the present invention, the mounting work can be facilitated and speeded up by simplifying the structure and fixing means, and the mounting structure is simpler than the conventional mounting structure using a mounting band or the like. And the mounting efficiency can be improved, and the electrode terminals can be protected by the engaging projections, and the earthquake resistance can be improved.

(b) Further, according to the electrolytic capacitor mounting structure of the present invention, a plurality of electrolytic capacitors can be collectively mounted between the first and second mounting plates, and the mounting states of the plurality of electrolytic capacitors are uniform. It becomes stronger and the reliability of the mounting state can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the mounting structure of the electrolytic capacitor of the present invention, FIG. 2 is a partial perspective view showing a concrete embodiment of the mounting structure of the electrolytic capacitor of the present invention, and FIG. FIG. 3 is an exploded perspective view showing a sealing plate of an electrolytic capacitor used in the mounting structure of the electrolytic capacitor of the present invention. 2 ... Exterior case 4 ... Capacitor element 14 ... Sealing plate 25 ... Abutment surface 26 ... Pedestal part 28 ... Engaging protrusions 30, 32 ... Electrode terminal 48 ... First mounting plate (covered) Mounting member) 50 ... Second mounting plate (attached member) 52 ... Engaging hole (engaging portion) 56 ... Bolt (fixing means) 64 ... Nut (fixing means)

Claims (1)

[Claims] 1. An engagement protrusion is provided on a sealing plate of an outer case,
An electrolytic capacitor in which an electrode terminal is led out from at least a region inside the outer periphery of the engaging projection and a pedestal is provided around the engaging projection, and an electrolytic capacitor is installed on the sealing plate side of the electrolytic capacitor, which is optional. A first mounting plate on which engaging portions are formed at intervals, a second mounting plate installed on the bottom surface side of the outer case of the electrolytic capacitor, and the engaging portion of the first mounting plate on the engaging portion. By engaging the engaging protrusion of the electrolytic capacitor, applying the first mounting plate to the pedestal, and applying the second mounting plate to the bottom surface side of the exterior case of the electrolytic capacitor. Fixing means for fixing the first and second mounting plates with the electrolytic capacitor interposed therebetween, and a mounting structure for an electrolytic capacitor.