JPH09291314A - Spacer holder for heating coil for crank shaft and heating coil for crank shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the development of wearing at one side of a spacer without inclining a spacer caused by the rotation of a crank shaft. SOLUTION: This spacer holder 100 for a heating coil for the crank shaft is the one for holding the spacer 300 which keeps a gap between a heating conductor 210 of the coil body 200 for heating the crank shaft as a work and the surface to be heated of the crank shaft to a constant. Further, the spacer holder 100 is provided with a side plate connecting part 110 fixed to a coil side plate 400 interposing the coil body 200 and a spacer fixing part 120 fixing the spacer 300, and the side plate connecting part 110 and the spacer fixing part 120 are integrally formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spacer holder for a crankshaft heating coil that holds a spacer that maintains a constant gap between the heating conductor of the coil body that heats the crankshaft and the heated surface of the crankshaft. ,
The present invention relates to a crankshaft heating coil using this spacer holder.

[0002]

2. Description of the Related Art A conventional spacer holder for a crankshaft heating coil of this type will be described with reference to FIG. The crankshaft heating coil is for subjecting the journal or pin as a heated surface of the crankshaft to induction hardening, and is a semi-open saddle type coil body 200 (however, the coil body 200 itself is shown in FIG. 6). And only the heating conductor 210 is shown) and this coil body 2
00, and a spacer 3 attached to the coil side plate 400 for maintaining a constant distance between the heating conductor 230 of the coil body 200 and the crankshaft journal or the like as the work.
00 and a spacer holder 500 attached to the spacer 300.

The spacer 300 is made of a material having insulation, abrasion resistance and heat resistance, such as ceramics. Among such spacers 300, those that come into contact with the top of a journal or the like are the pair of coil side plates 400
One is attached to each.

A spacer 300 is provided on each coil side plate 400.
Is provided on the inner side surface of the guide portion 420 for restricting the mounting position of the. The guide portion 420 is a downwardly protruding substantially concave vein, and its interval is set to be equal to the width dimension of the spacer 300 to be attached. Therefore,
The guide portion 420 is adapted to contact both side surfaces and the upper surface of the spacer 300.

The spacer holder 500 is connected to the spacer 300 by a bolt and a nut in a state of being sandwiched between a pair of spacers 300 whose mounting positions are regulated by the guide portion 420 of each coil side plate 400. That is, the through holes of the coil side plate 400, the through holes of the spacer 300, and the through holes of the spacer holder 500 are aligned, and the nuts are screwed into the bolts penetrating these through holes, whereby the coil side plates 400, the spacers 300 and spacer holder 50
The 0s are connected together.

[0006]

However, the above-mentioned conventional spacer holder has the following problems. That is, since the spacer is in contact with the crankshaft, which is the work, a force is applied in the direction of rotation of the crankshaft. Due to this force, the spacer is tilted and worn away, and the gap between the heated surface of the crankshaft and the heating conductor of the coil body cannot be maintained constant.
As a result, the quench depth of the heated surface of the crankshaft may differ from the designed value.

The present invention was devised in view of the above circumstances, and the spacer is not tilted by the rotation of the crankshaft, and the spacer is not evenly worn, and the heated surface of the crankshaft and the coil body are constantly To provide a spacer holder for a crankshaft heating coil and a crankshaft heating coil such that a quenching depth of a heated surface of a crankshaft has a designed value by maintaining a constant gap between the heating conductor and the heating conductor. It is an object.

[0008]

A spacer holder for a crankshaft heating coil according to claim 1 maintains a constant gap between a heating conductor of a coil body for heating the crankshaft and a heated surface of the crankshaft. A spacer holder for a crankshaft heating coil that holds a spacer, which has a side plate connecting part fixed to a coil side plate sandwiching the coil body, and a spacer fixing part to which the spacer is fixed. The connecting portion and the spacer fixing portion are integrally formed.

Further, in the crankshaft heating coil spacer holder according to a second aspect of the present invention, the side plate connecting portion includes a first connecting portion fixed to one of opposing coil side plates.
And a second connecting portion fixed to the other.
The two connecting parts are arranged symmetrically with respect to the spacer fixing part.

In the spacer holder for a crankshaft heating coil according to a third aspect of the present invention, the spacer fixing portion is provided with a guide portion that abuts at least a side surface of the spacer.

On the other hand, a crankshaft heating coil according to a fourth aspect of the present invention includes a spacer for maintaining a constant gap between a coil body for heating the crankshaft and a heated surface of the crankshaft, and a spacer for holding the spacer. A holder and a coil side plate sandwiching the coil body are provided, and the spacer holder has a side plate connecting part fixed to the coil side plate and a spacer fixing part to which the spacer is fixed. The side plate connecting portion and the spacer fixing portion are integrally formed.

Further, in the crankshaft heating coil according to the fifth aspect, the side plate connecting portion includes a first connecting portion fixed to one of the opposing coil side plates and a second connecting portion fixed to the other. The two connecting portions are arranged point-symmetrically with respect to the spacer fixing portion.

Further, in the crankshaft heating coil according to the sixth aspect, the spacer fixing portion is provided with a guide portion that abuts at least a side surface of the spacer.

[0014]

1 is a schematic perspective view of a crankshaft heating coil spacer holder according to an embodiment of the present invention, and FIG. 2 is a crankshaft heating coil spacer holder according to an embodiment of the present invention. A schematic front view of the crankshaft heating coil used, FIG. 3 is a schematic partial bottom view of the crankshaft heating coil using the spacer holder of the crankshaft heating coil according to the embodiment of the present invention, and FIG. FIG. 5 is a schematic perspective view of a coil body used in a spacer holder for a crankshaft heating coil according to an embodiment of the present invention. FIG. 5 shows a spacer held by a spacer holder for a crankshaft heating coil according to an embodiment of the present invention. It is a schematic perspective view. It is to be noted that parts and the like that are substantially the same as those of the related art are denoted by the same reference numerals and described.

In the crankshaft heating coil spacer holder 100 according to the embodiment of the present invention, a gap is provided between the heating conductor 210 of the coil body 200 for heating the crankshaft, which is a workpiece, and the heated surface of the crankshaft. A coil side plate 400 for holding the spacer 300 that is maintained constant and sandwiching the coil body 200.
The side plate connecting part 110 fixed to the spacer 300 and the spacer 300.
And a spacer fixing portion 120 to which is fixed, and the side plate connecting portion 110 and the spacer fixing portion 120 are integrally formed.

The coil body 200 is of a so-called semi-open saddle type, and has four heating conductors 210 of substantially 1/4 arc shape along the circumferential surface of the heated surface of the journal or the pin of the crankshaft, and this heating. It has a connecting conductor 220 for connecting the conductors 210, and a pair of power feeding conductors 230 for connecting the coil body 200 and a power source (not shown).

The coil body 200 is formed by bending a square pipe made of copper or the like, and a cooling liquid flows through the inside thereof. The cooling liquid flows from one power feeding conductor 230 to the other power feeding conductor 230 via the heating conductor 210 and the connecting conductor 220.

A pair of feeding conductors 2 of the coil body 200
30 and the middle S-shaped connecting conductor 220 are bent to form a space between them, into which a substantially wedge-shaped spacer 300 described later can be inserted (FIG. 3).
reference).

The heating conductor 2 of the coil body 200
An appropriate core is attached to 10 as required.

A pair of coil side plates 400 are attached to the coil body 200 described above. Such coil side plate 4
00 is a plate material having heat resistance, and is used for the coil body 20.
It is attached to the coil main body 200 by an attachment screw (not shown) provided at 0.

The coil side plate 400 is formed with a downward curved cutout portion 410 as shown by a chain double-dashed line in FIG. The curved notch portion 410 is provided in the coil body 200.
Of the heating conductor 210. That is, the curved notch 410 is set so that the heating conductor 210 can be slightly seen through the curved notch 410 when the coil body 200 is attached to the coil side plate 400. The curved notch 410 is also set so that the tip 310 of the attached spacer 300 can be seen.

Further, on the inner surface of the coil side plate 400,
A downward-facing generally concave guide portion 420 for positioning the spacer 300 is formed (however, not shown in FIG. 2 but shown in FIG. 3). The space between the guide portions 420 is the spacer 30 to be attached.
It is set equal to the width dimension of 0. Therefore, the guide portion 420 is in contact with both side surfaces and the upper surface of the spacer 300. Furthermore, this coil side plate 400
Two bolt holes (not shown) are formed in the through hole 122 of the spacer holder 100 and the through hole 320 of the spacer 300, which will be described later.

On the other hand, the spacer 300 is made of a material having insulating properties, abrasion resistance and heat resistance, such as ceramics. As shown in FIG. 4, the spacer 300 has a tip portion 310 that protrudes to the front side and is thinner than the base end portion. Because of the protruding tip portion 310, the spacer 300 is formed in a substantially L shape when viewed in the lateral direction. Further, two through holes 320 are formed on the front surface of the spacer 300.

As shown in FIG. 1, the spacer holder 100 for holding the spacer 300 has a coil side plate 400.
The side plate connecting portion 110 that is fixed by contacting the inner surface of the above is integrally formed with the spacer fixing portion 120 that fixes the two spacers 300, and is formed in a generally crank shape in plan view as a whole. .

The spacer fixing portion 120 is a portion to which the two spacers 300 are fixed, and a pair of guide portions 121 are provided on both front and back surfaces. The guide portions 121 are formed at intervals such that the spacers 300 fit therein, and the spacers 30 are provided between the guide portions 121.
It inserts 0. In addition, this spacer fixing portion 12
Two through holes 122 are opened at 0. The through hole 122 is a portion through which a bolt (not shown) is integrated with the through hole 320 of the spacer 300 fitted between the guide portions 121.

The side plate connecting portion 110 is a first connecting portion 110A fixed to one of the coil side plates 400 facing each other.
And a second connecting portion 110B fixed to the other. The two connecting portions 110A and 110B are arranged point-symmetrically with respect to the spacer fixing portion 120. The two connecting portions 110A and 110B, including the guide portion 121, are formed so as to project from the side plate connecting portion 110. That is, the pair of coil side plates 400
In the spacer holder 100 sandwiched between the coil side plate 4 and the first connecting portion 110A and the second connecting portion 110B.
The spacer fixing portion 120 does not come into contact with the coil side plate 400 in the state of being in contact with the inner surface of the coil 00.

Bolt holes 111 are formed in the first connecting portion 110A and the second connecting portion 110B constituting the side plate connecting portion 110 (however, the second connecting portion 1).
10B is not shown). This bolt hole 111
Is a portion into which bolts (not shown) that connect the spacers 100 to the coil side plates 400 are screwed.

The two spacers 300 are fitted into the spacer fixing portion 120 of the spacer holder 100. At this time, the through hole 320 of the spacer 300 and the spacer holder 1
00 through holes 122 are aligned. In this state,
Each spacer 300 projects from the first connecting portion 110A and the second connecting portion 110B of the spacer holder 100.

In this state, the spacer holder 100 is sandwiched between the pair of coil side plates 400. Then, the first connecting portion 110A and the second connecting portion 110B respectively contact the inner surface of the coil side plate 400. At the same time, the tip portion 310 of the spacer 300 contacts the edge portion of the curved cutout portion 410 of the coil side plate 400. Further, the spacer 30
0 is sandwiched between the guide portions 420 of the coil side plate 400. At this time, the through holes 122, 32
0 and the bolt hole of the coil side plate 400 are matched.

Then, a nut (not shown) is screwed into the bolt hole (not shown) penetrating the bolt hole and the through holes 122 and 320 of the coil side plate 400, and the bolt hole 11
By screwing a bolt (not shown) to 1, the spacer holder 100 is incorporated into the crankshaft heating coil together with the spacer 300.

On the other hand, the heating coil 200 located between the coil side plates 400 is connected to the coil side plate 400 by a connecting means (not shown) provided on the heating conductor 210 or the like. The feeding conductors 230 of the heating coil 200 pass near the spacer holder 100, but do not interfere with each other as shown in FIG.

Further, this crankshaft heating coil has two more sets of spacers 600A and 600B. That is, the spacers 600A and 6A shown in FIG.
00B. The spacers 600 </ b> A and 600 </ b> B are in lateral contact with the surface to be heated of the crankshaft and are attached to the coil side plate 400.

The operation of the spacer holder 100 of the crankshaft heating coil thus constructed will be described. When the crankshaft heating coil incorporating the spacer holder 100 as described above is used to heat the crankshaft journal, the crankshaft is rotationally driven while the spacer 300 is in contact with the journal. With the rotation of the crankshaft, a force is applied to the spacer 300 in the direction of arrow A shown in FIG. 2, that is, in the direction of rotation of the crankshaft. The spacer 300 is connected to the coil side plates 400 on the front and back sides of the spacer holder 100.
Since the spacers 500 are fixed to the spacers 500, the spacers 500 are not displaced and tilted as compared with the conventional type in which the spacers 500 are between the two spacers 300 (see FIG. 5). Therefore, the spacer 300 is not worn down, and the possibility that the quenching depth of the heated surface of the crankshaft due to the wear is different from the designed value is reduced.

In the crankshaft heating coil according to the above-mentioned embodiment, the guide portion 420 formed on the coil side plate 400 is formed in the downward concave shape, but the present invention is not limited to this. It is not limited. It is sufficient if the spacer 300 can be positioned with respect to the coil side plate 400 and the inclination of the spacer 300 due to the rotation of the crankshaft can be prevented, so that a pair of vertical parallel protrusions matching the width dimension of the spacer 300 can be used. It may be.

However, if the guide portion 420 is formed in a downward concave shape, it is more convenient because the spacer 300 can be easily positioned in the vertical direction.

[0036]

The crankshaft heating coil spacer holder according to the first aspect of the present invention holds a spacer for maintaining a constant gap between the heating conductor of the coil body for heating the crankshaft and the heated surface of the crankshaft. A spacer holder for a crankshaft heating coil, comprising: a side plate connecting part fixed to a coil side plate sandwiching the coil body; and a spacer fixing part fixing the spacer to the side plate connecting part and the spacer. The fixed portion is formed integrally.

That is, according to this spacer holder,
The spacer is connected to the coil side plate via the spacer holder. Therefore, the force in the direction of rotation due to the rotation of the crankshaft with which the spacer is in contact is also received by the coil side plate through the spacer holder, so that the spacer may or may not be tilted by the force. Is also much smaller than the conventional one. As a result, the spacer is always in contact with the crankshaft in a normal position, so there is no uneven wear of the spacer, and the quenching depth due to uneven wear does not differ from the design value. Alternatively, heating is possible.

The side plate connecting portion of the spacer holder of the crankshaft heating coil according to the second aspect is a first connecting portion fixed to one of the opposing coil side plates and a second connecting portion fixed to the other. And the two connecting portions are arranged point-symmetrically with respect to the spacer fixing portion.

Therefore, no matter which direction the crankshaft is rotated, the inclination of the spacer can be prevented.

Furthermore, the spacer fixing portion of the spacer holder of the crankshaft heating coil according to the third aspect is provided with a guide portion that abuts at least the side surface of the spacer.

Since such a guide portion is provided, the spacer can be easily and accurately positioned with respect to the spacer holder, and the spacer can be more firmly fixed to the spacer holder, so that the spacer is always in a normal position with respect to the crankshaft. Can be contacted with.

On the other hand, a crankshaft heating coil according to a fourth aspect of the present invention includes a spacer for maintaining a constant gap between a coil body for heating the crankshaft and a heated surface of the crankshaft, and a spacer for holding the spacer. A holder and a coil side plate sandwiching the coil body are provided, and the spacer holder has a side plate connecting part fixed to the coil side plate and a spacer fixing part to which the spacer is fixed. The side plate connecting portion and the spacer fixing portion are integrally formed.

Therefore, according to this crankshaft heating coil, the spacer is connected to the coil side plate through the spacer holder. Therefore, the force in the direction of rotation due to the rotation of the crankshaft with which the spacer is in contact is also received by the coil side plate through the spacer holder, so that the spacer may or may not be tilted by the force. Is also much smaller than the conventional one.
As a result, the spacer is always in contact with the crankshaft in a normal position, so that the spacer is not worn out.
The quenching depth due to uneven wear does not differ from the design value, and higher quality quenching or heating becomes possible.

Further, in the crankshaft heating coil according to the fifth aspect, the side plate connecting portion of the spacer holder is fixed to one of the opposing coil side plates, and
And a second connecting portion fixed to the other.
The two connecting parts are arranged symmetrically with respect to the spacer fixing part.

Therefore, in this crankshaft heating coil, the inclination of the spacer can be prevented regardless of which direction the crankshaft is rotated.

Further, in the crankshaft heating coil according to the sixth aspect, the spacer fixing portion is provided with a guide portion that abuts at least the side surface of the spacer.

Therefore, since such a guide portion is provided, the spacer can be easily and accurately positioned with respect to the spacer holder, and the spacer can be more firmly fixed to the spacer holder, so that the spacer is always kept normal to the crankshaft. It can be contacted at any position.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a spacer holder for a crankshaft heating coil according to an embodiment of the present invention.

FIG. 2 is a schematic front view of a crankshaft heating coil using a crankshaft heating coil spacer holder according to an embodiment of the present invention.

FIG. 3 is a schematic partial bottom view of a crankshaft heating coil using a crankshaft heating coil spacer holder according to an embodiment of the present invention.

FIG. 4 is a schematic perspective view of a coil body used in the spacer holder of the crankshaft heating coil according to the embodiment of the present invention.

FIG. 5 is a schematic perspective view of a spacer held by a spacer holder of the crankshaft heating coil according to the embodiment of the present invention.

FIG. 6 is a schematic partial bottom view of a crankshaft heating coil in which a spacer holder for a conventional crankshaft heating coil is used.

[Explanation of reference numerals] 100 spacer holder 110 side plate connecting part 110A first connecting part 110B second connecting part 120 spacer fixing part 121 guide part 200 coil body 210 heating conductor 300 spacer 400 coil side plate

Claims (6)

[Claims] 1. A spacer holder for a crankshaft heating coil, which holds a spacer for maintaining a constant gap between a heating conductor of the coil body for heating the crankshaft and a heated surface of the crankshaft, the coil body comprising: It has a side plate connecting part fixed to the coil side plate to be sandwiched and a spacer fixing part to which the spacer is fixed, and the side plate connecting part and the spacer fixing part are integrally formed. Spacer holder for crankshaft heating coil. 2. The side plate connecting part has a first connecting part fixed to one of the coil side plates facing each other and a second connecting part fixed to the other side plate, and the two connecting parts. 2. The spacer holder for the crankshaft heating coil according to claim 1, wherein the spacer holder is arranged symmetrically about the spacer fixing portion. 3. The spacer holder for a crankshaft heating coil according to claim 1, wherein the spacer fixing portion is provided with a guide portion that abuts at least a side surface of the spacer. 4. A coil body for heating a crankshaft, a spacer for maintaining a constant gap between a heated surface of the crankshaft, a spacer holder for holding the spacer, and a coil side plate for sandwiching the coil body. The spacer holder has a side plate connecting part fixed to the coil side plate and a spacer fixing part to which the spacer is fixed, and the side plate connecting part and the spacer fixing part are: A crankshaft heating coil, which is formed integrally. 5. The side plate connecting part has a first connecting part fixed to one of the coil side plates facing each other and a second connecting part fixed to the other, and the two connecting parts. The crankshaft heating coil according to claim 4, wherein is arranged symmetrically with respect to the spacer fixing portion. 6. The crankshaft heating coil according to claim 4, wherein the spacer fixing portion is provided with a guide portion that abuts at least a side surface of the spacer.