JP2905887B2 - Transformer fixing device and transformer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer fixing device suitable for fixing a transformer using a ferrite core and a transformer using the transformer fixing device.

[0002]

2. Description of the Related Art Conventionally, as a transformer fixing device for fixing a transformer and a transformer fixed by such a transformer fixing device, a transformer disclosed in JP-A-5-135960 is known. In this transformer, a one-turn cut-type wound core around which a coil is wound is sandwiched by a pair of iron core holding hardware, and the two iron core holding hardware are connected and fixed by a connecting member using a stud and a nut.

[0003]

However, conventional transformers (transformer fixed units), including the above-described transformer, have the following problems.

First, many components such as a pair of iron core holding hardware and a plurality of connecting members including studs and nuts are required, resulting in a decrease in assemblability and an increase in cost.

Second, the rigidity and stability of the transformer fixing device become insufficient, and when a ferrite core that is easily cracked is used for the core portion, the core portion cannot be sufficiently protected and accurate positioning cannot be performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems existing in the prior art, and can improve the assemblability and reduce the cost, and can sufficiently protect and position the core unit. And the provision of transformers.

[0007]

A transformer fixing device 1 according to the present invention comprises a bottom plate 2 and four side plates 3a, 3b, 3c, 3d bent from the edge of the bottom plate 2 as one plate material. By integrally forming with K, a pair of opposing side plate portions 3a and 3b, 3c and 3d are provided in the orthogonal direction, and a transformer body To is provided at both ends of the pair of side plate portions 3a and 3b arranged on one side. Core holding portions 5ac, 5ad, 5bc, 5 each having a locking portion 6 at its tip.
bd and a pair of side plates 3c arranged on the other side.
And 3d are provided at both ends of a fixing device body 1s provided with locked portions 7 to which the locking portions 6 are locked, and inside the side plate portion 3c (3d) having the locked portions 7. Core holder 11 (1
2) and a fixing screw N screwed into a screw hole 9 provided in one of the side plate portions 3c having the locked portions 7...

In this case, according to the most preferred embodiment, the core holding portions 5ac, 5ad, 5bc, 5bd are provided with support pieces 8 for supporting the lower surface of the core Co of the transformer body To. Further, one core holder 11 is provided with a positioning portion 11s into which a tip Ns of a fixing screw N screwed into the screw hole 9 of the side plate portion 3c is fitted.
Is provided with a positioning portion 12s in which the positioning portion 14s provided on the other side plate portion 3d is fitted. The core holders 11 are further provided with slidable auxiliary holders 21.
May be attached.

In the transformer T according to the present invention, the transformer main body To is accommodated in such a fixing device main body 1s, and the side plate portion 3c (3d) having the locked portions 7. Between the core portions Co of the core holder 11 (1
2) and fixed to the transformer main body To by screwing into a screw hole 9 provided in one of the side plate portions 3c having the locked portions 7... And by tightening a fixing screw N whose tip Ns contacts the core holder 11. It is characterized in that the vessel body 1s is fixed. In this case, the fixing screw N forms the fastening part P.
The core Co uses a ferrite core.

[0010]

The transformer fixing device 1 and the transformer T according to the present invention
According to the present invention, the fixing device main body 1s includes a bottom plate 2 and the bottom plate 2
Four side plates 3a, 3b, 3 bent upright from the edge of
c and 3d, which are integrally formed by a single plate material K. In this case, one side plate portions 3a and 3b face each other, and the other side plate portions 3c and 3d also face each other, and are arranged in orthogonal directions. The locking portions 7 provided at both ends of the pair of side plate portions 3a and 3b are locked to the locked portions 7 provided at both ends of the pair of side plate portions 3c and 3d provided at the other side. Then, each side plate part 3a, 3b, 3c and 3d
Are connected together.

On the other hand, the transformer body To can be accommodated in the fixing body 1s from above. After containment,
The core part Co of the transformer body To is made up of the core holding parts 5ac,
The lower surface of the core portion Co is supported by supporting pieces 8 provided on the core holding portions 5ac, 5ad, 5bc, 5bd.

When the fixing screw N screwed into the screw hole 9 provided in the one side plate portion 3c is tightened, the locking portions 6 are not disengaged from the locked portions 7, and the transformer body To is fixed to the fixing device. It is fixed to the main body 1s. At this time, the transformer body To
Since the core holder 11 (12) is attached to the core portion Co, the core portion Co is protected. Also, fixing screw N
The tip Ns is positioned by fitting into a positioning portion 11s provided on one of the core holders 11, and the portion to be positioned 14s provided on the side plate portion 3b is positioned on the other core holder 1.
The positioning is performed by fitting to the positioning portion 12s provided in the second position. Further, if the auxiliary holders 21 are slidably mounted on the core holders 11, the displacement of the core holding portions 5ac, 5ad, 5bc, 5bd when the fixing screw N is tightened is absorbed.

Therefore, basically, since the transformer fixing device 1 suffices with the fixing device main body 1s and the fixing screw N which are integrally formed,
The number of parts is greatly reduced, and assemblability is improved and cost is reduced. Further, the fixing device main body 1s includes coil holding portions 4a and 4b and core holding portions 5ac, 5ad, 5bc,
Since 5bd is integrally provided, rigidity and stability are enhanced, and sufficient protection and accurate positioning of the core portion Co are performed.

[0014]

Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

First, the configuration of a transformer fixing device 1 according to the present embodiment will be described with reference to FIGS.

The transformer fixing device 1 has a fixing device main body 1s shown in FIGS. The fixing device main body 1s is integrally formed by a single sheet material K formed by punching as shown in FIG. In addition,
Aluminum, stainless steel, spring steel materials (silicon manganese, manganese chromium, chromium vanadium, etc.), beryllium copper, phosphor bronze, nickel silver, and the like can be used as the material for forming the fixing body 1s.

The fixing device main body 1s includes a rectangular bottom plate portion 2;
Four side plates 3a, 3 extending from four sides of the bottom plate 2
b, 3c, 3d, and each side plate portion 3a, 3b, 3c, 3
d is bent at a right angle from the edge of the bottom plate 2. As a result, two pairs of opposed side plate portions 3a and 3b and 3c and 3d are arranged in the orthogonal direction. In addition, 31 ... mounting holes provided near the four corners of the bottom plate portion 2.

A pair of side plates 3a and 3
As shown in FIG. 1, b includes coil holding portions 4a and 4b for holding the coil portions Ci and Cj of the transformer body To and core portions Co of the transformer body To which extend from both ends of the coil holding portions 4a and 4b. And a locking portion 6 at the tip.
The core holding parts 5ac, 5ad, 5bc, 5bd having the following are provided. In this case, the coil holding portions 4a, 4b are bent in a U-shape in plan view along the coil portions Ci, Cj of the transformer body To, and the core holding portions 5ac, 5ad,
5bc and 5bd are formed in a band shape having a relatively narrow vertical width, and are bent along the core portion Co. As shown in FIG. 4, the locking portions 6 are provided with core holding portions 5ac, 5a.
d, 5bc, and 5bd are formed to protrude in the vertical direction from the tips. Further, the core holding parts 5ac, 5ad, 5bc, 5b
On the lower side of d, the core part Co is bent at a right angle.
Are provided. The support pieces 8 support the lower surface of. In the figure, 32 ...
Is an opening provided in each side plate portion 3a and 3b in consideration of weight reduction and heat dissipation.

On the other hand, a pair of side plates 3c and 3
At both ends of d, locked portions 7 to which the locking portions 6 are locked are bent at right angles. The locked parts 7 are the side plate parts 3c and 3d.
Are formed at both ends of each of them in a vertically separated manner. Also,
A screw hole 9 is provided in one side plate 3c. In this case, the screw hole 9 may be formed directly in the side plate portion 3c, or a nut 33 formed of a different material on the inner surface of the side plate portion 3c as in the embodiment.
May be fixed by welding or the like. On the other hand, on the side plate portion 3d, the positioning portion 14 having a taper swelling inwardly is formed.
s is provided. In the figure, reference numerals 34 indicate rib portions bent at right angles from the upper ends of the side plates 3c and 3d.

Further, the transformer fixing device 1 includes a pair of core holders 11 for holding the core portion Co of the transformer body To,
12 (see FIGS. 1 and 5). One core holder 11 is made of a thin and elastic stainless steel plate or the like.
It is integrally formed as shown in FIGS. Core holder 11
Is a back plate 41, an upper plate 42, a lower plate 43, and a left plate 44.
And a right side plate portion 45, and the back plate portion 41 is provided with a pair of core pressing portions 46 formed on the inner surface side, and has a screw hole in the side plate portion 3c in the center as shown in FIG. 9 is provided with a positioning portion 11s formed by a concave taper into which the tip end Ns of the fixing screw N screwed into 9 is fitted. Therefore, the fixing screw N
Is also provided with a taper that fits into the positioning portion 11s. Also, the upper plate portion 42, the lower plate portion 43, and the left plate portion 44
The right side plate portion 45 is appropriately bent so as to press and hold the core portion Co. The other core holder 12
Is basically formed in the same manner as the core holder 11, but FIG.
As shown in the figure, at the center of the back plate portion 46 of the core holder 12,
The difference is that a positioning portion 12s having a concave taper that fits the positioning portion 14s provided on the side plate portion 3d is provided.

Next, a method of using the transformer fixing device 1 according to the present invention and a structure of the transformer T will be described with reference to FIGS.

First, the fixing device body 1s shown in FIGS. 3 to 5 is manufactured from the plate material K shown in FIG. In this case, the side plates 3a, 3b, 3c and 3d are bent with respect to the bottom plate 2 and rise up at a right angle, and the locking portions 6 provided on the side plates 3a and 3b.
Can be locked to the locked portions 7 provided on the side plate portions 3c and 3d, and can be manufactured very easily.

Next, as shown in FIG. 5, the transformer body To is housed in the fixing device body 1s from above. The transformer body To has a core Co as shown in FIG.
The core Co is composed of a U-shaped core Cou and an I-shaped core Coi.
Of the core portions Cou, Coi
Also use a ferrite core. On the other hand, on the U-shaped core part Cou, two coil parts Ci and Cj each having a wire wound around a coil bobbin Bi and Bj are mounted, and the coil parts Ci and Cj are mounted.
The core holder 12 is mounted on the core portion exposed from Cj. The other I-shaped core portion Coi has a core holder 11.
Attach. And first, in the fixing device body 1s,
The U-shaped core portion Cou to which the coil portions Ci and Cj are mounted is housed, and the positioning portion 12s of the core holder 12 is fitted to the positioning portion 14s of the side plate portion 3d.
The shaped core part Coi is accommodated in the fixing device main body 1s, and the core holder 11 is opposed to the side plate part 3c.

Thus, the coil portions Ci and Cj of the transformer body To are held by the coil holding portions 4a and 4b, and the core portion Co is held by the core holding portions 5ac and 5a.
d, 5bc, 5bd, and furthermore, the core portion C
The lower surface of the core holding portions 5ac, 5ad, 5bc, 5b
are supported by the support pieces 8. Note that, in this case, the coil portions Ci and Cj are connected to the coil holding portions 4a and 4b.
It is not always necessary to make contact with.

Then, a fixing screw N is screwed into the screw hole 9 of the side plate portion 3c, and if the fixing screw N is tightened, the core portion Co is also tightened by the fixing screw N. As a result, the core portion Co is fixed, and the locking portions 6.
… It won't come off. At this time, the tip Ns of the fixing screw N is fitted to the positioning portion 11s of the side plate 3c. Thus, the assembly is completed. In FIG. 1, reference numerals 61...
Shows a leader line from i, Cj.

Therefore, since the transformer fixing device 1 suffices with the integrally formed fixing device main body 1s and the fixing screw N, the number of parts is greatly reduced, and the assembling property is improved and the cost is reduced. Further, the fixing device main body 1s includes the coil holding portions 4a, 4
b and the core holding portions 5ac, 5ad, 5bc, 5bd are integrally provided, so that rigidity and stability are enhanced, and the core portion C
O is sufficiently protected, and accurate positioning is performed.

FIGS. 10 and 11 show a modified embodiment. In the modified embodiment, auxiliary holders 21 formed in a U-shape are slidably mounted on the outer surfaces of the core holders 11. Thereby, as shown in FIG. 11, when the fixing screw N is tightened, even if the core holding portion 5bc is shifted to the position 5bs indicated by the imaginary line, only the core holders 11 are relative to the auxiliary holder portions 21. The displacement is absorbed by the displacement.

By the way, the shape of the side plates 3b is as shown in FIG.
As shown by the imaginary line 3s, the coil portion Cj... Or the core portion Co can be held without necessarily being along the coil portion Cj... Or the core portion Co, but the coil bobbin Bj.
Unnecessarily high stress is applied to the end of, and cannot be adopted.

The embodiment has been described in detail above.
The present invention is not limited to such an embodiment.
For example, the other core holder 12 does not necessarily need to be used. Also, a plate piece or the like is bonded to the I-shaped core portion Coi,
The tip of the fixing screw N may be applied to this plate piece.
Furthermore, in the embodiment of the core portion Co, a cut core of a silicon steel plate or an amorphous copper band can be used, and the shape of the core portion Co is exemplified by the UI type. I type, EE type and the like can be used. Of course, such an embodiment of the core portion Co and the shape of the core portion Co can be arbitrarily combined.
In addition, the configuration, shape, material, quantity, and the like of the details can be arbitrarily changed without departing from the gist of the present invention.

[0030]

As described above, in the transformer fixing device according to the present invention, the bottom plate portion and the four side plate portions bent from the edge of the bottom plate portion are integrally formed by one plate material, thereby forming two sets. A pair of side plate portions facing each other are provided in the orthogonal direction, and a core holding portion that holds the core portion of the transformer body and has a locking portion at the tip is provided at both ends of the pair of side plate portions arranged on one side, and the other. A fixed body provided with locked portions at both ends of a pair of side plate portions provided with a locking portion, a core holder provided inside the side plate portion having the locked portion, A fixing screw which is screwed into a screw hole provided in one side plate portion having a stop portion, and a tip of which is in contact with a core holder, is provided.The transformer according to the present invention includes a transformer main body in such a fixing device main body. Between the side plate part that houses and has the locked part and the core part of the transformer body Along with disposing the holder, it is screwed into a screw hole provided in one side plate portion having a locked portion, and the tip of the transformer body and the fixing device body are fixed by tightening a fixing screw corresponding to the core holder, It has the following remarkable effects.

Since the transformer fixing device requires only the fixing device main body formed integrally and one fixing screw, the number of parts can be significantly reduced, and the assemblability can be improved and the cost can be reduced.

[0032] Since the fixing device main body is integrally provided with the coil holding portion and the core holding portion, rigidity and stability are increased,
Even when a ferrite core that is easily cracked is used for the core, sufficient protection and accurate positioning for the core can be performed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view of a transformer according to the present invention (A in FIG. 4).
-A line position),

FIG. 2 is a cross-sectional configuration diagram of a portion to be positioned in a transformer fixing device according to the present invention;

FIG. 3 is a plan view of the transformer fixing device,

FIG. 4 is a front view of the transformer fixing device,

FIG. 5 is a left side view of the transformer fixing device including a cross-sectional view of the transformer main body,

FIG. 6 is a plan view of a plate material used for the transformer fixing device.

FIG. 7 is a front view of a core holder used in the transformer fixing device.

FIG. 8 is a partial cross-sectional plan view of the core holder,

FIG. 9 is a side view of the core holder,

FIG. 10 is a sectional side view of a core holder according to a modified embodiment of the present invention,

FIG. 11 is a plan view showing a part of a transformer using the core holder;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transformer fixing device 1s Fixing device main body 2 Bottom plate part 3a ... Side plate part 5ac ... Core holding part 5bc ... Core holding part 6 ... Locking part 7 ... Locked part 8 ... Support piece part 9 Screw hole 11 Core holder 11s Positioning part 12 Core holder 12s Positioning part 14s Positioned part 21 ... Auxiliary holder K Plate material T Transformer To transformer body Ci ... Coil part Co Core part N Fixing screw Ns Tip of fixing screw P Tightening part

Claims (7)

(57) [Claims] 1. By integrally forming a bottom plate portion and four side plate portions bent from an edge of the bottom plate portion with one plate material,
A pair of opposed side plate portions are provided in the orthogonal direction, and at both ends of a pair of side plate portions arranged on one side, a core holding portion holding the core portion of the transformer body and having a locking portion at a tip is provided. Provided, a fixed body provided with a locked portion to which the locking portion is locked at both ends of a pair of side plate portions arranged on the other side,
A core holder provided inside the side plate portion having the locked portion, and a fixing screw which is screwed into a screw hole provided in one side plate portion having the locked portion and whose tip abuts the core holder. A transformer fixing device. 2. The transformer fixing device according to claim 1, wherein the core holding portion has a support piece that supports a lower surface of the core portion of the transformer body. 3. The transformer fixing device according to claim 1, wherein one of the core holders has a positioning portion into which a tip of a fixing screw screwed into a screw hole of the side plate portion is fitted. 4. The transformer fixing device according to claim 1, wherein the other core holder has a positioning portion to which a positioning portion provided on the other side plate portion having the locking portion is fitted. 5. The transformer fixing device according to claim 1, wherein the core holder has an auxiliary holder slidably mounted. 6. By integrally forming a bottom plate portion and four side plate portions bent from the edge of the bottom plate portion with one plate material,
A pair of opposed side plate portions are provided in the orthogonal direction, and at both ends of a pair of side plate portions arranged on one side, a core holding portion holding the core portion of the transformer body and having a locking portion at a tip is provided. A transformer main body is housed in a fixing device main body provided with a locked portion on which the locking portion is locked at both ends of a pair of side plate portions provided on the other side, and the locked portion is provided. Disposing a core holder between the side plate portion and the core portion of the transformer main body, and screwing into a screw hole provided in one of the side plate portions having the locked portion, and tightening a fixing screw having a tip corresponding to the core holder. A transformer, wherein the transformer body and the fixing device body are fixed. 7. The transformer according to claim 6, wherein the core is a ferrite core.