JPH0517992U - Mounting structure of core to high frequency induction heating coil - Google Patents

Abstract

(57) [Summary] [Purpose] Even when the core bonded to the heating coil is unbonded, the core is prevented from falling off. [Structure] The core 21 is bonded to the conductor 12 of the heating coil, and is disposed on a core support plate 31 whose one end is brazed to the conductor 12.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for mounting a core on a high frequency induction heating coil (hereinafter, referred to as a high frequency induction heating coil when simply referred to as a heating coil). The core is attached to the conductor of the heating coil so as to concentrate most of the magnetic flux generated by the conductor on the surface to be hardened.

[0002]

[Prior Art]

 Conventionally, when attaching the core to the heating coil, it is common to adhere the core to the conductor of the heating coil using an adhesive.

[0003]

[Problems to be solved by the device]

 However, since the heating coil is often moved up and down and stopped, it receives a shock at this time, so if the core is not sufficiently adhered to the heating coil, the core will not move from the heating coil. May fall out. Further, the radiant heat from the heated work may deteriorate the adhesive and cause the core to fall off.

The present invention has been made in view of the above circumstances, and is a structure for attaching a core to a heating coil, which can prevent the core from falling off even if the core adhered to the heating coil is unbonded. Is intended to provide.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the structure for attaching a core to a heating coil according to the present invention is the same as the structure for attaching a core to a heating coil, wherein the core is adhered to the coil and one end portion of the coil is It is arranged on a brazed core support plate.

Another structure of attaching the core to the heating coil of the present invention is the same as the attaching structure of the core to the heating coil, wherein the core is bonded to the coil and one end of the core is attached to the coil. The other end portion is attached between the core fixing plates that are bent so as to press the core against the coil.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. First, an example of a heating coil to which the mounting structure of this embodiment is applied will be described. An example of the work heated by the heating coil is a multi-stage shaft used in a traveling system such as an automobile.

As shown in FIG. 12, the upper part of the multi-stage shaft 90 is provided with steps 94 and 95, so that a small diameter portion 91 and a middle diameter portion 92 are provided above and below the step difference 94, respectively. A medium diameter portion 92 and a large diameter portion 93 are formed respectively. To heat the small diameter portion 91, the step 94, the medium diameter portion 92, and the step 95 for quenching, the heating coil 100 shown in FIG. 11 is used.

The heating coil 100 includes conductors 11 to 19 connected in series between a pair of power supply conductors 10 and 20. While rotating the multistage shaft 90 around the shaft 90a, the conductor 11, 12, 18 and 19 heat the small diameter portion 91, the conductors 13 and 17 heat the step 94, the conductors 14 and 16 heat the medium diameter portion 92, and the conductor 15 heats the step 95.

U-shaped cores 21 and 22 are inserted and fixed in substantially straight central portions of the heating coil 100, for example, the conductors 12 and 18, respectively, as schematically shown in FIG. There is. Further, a substantially U-shaped core 23 is attached to the arc-shaped conductor, for example, the conductor 15, over substantially the entire length thereof.

As a first embodiment of the present invention, a mounting structure for mounting the U-shaped core 21 shown in FIG. 4 to a vertical linear conductor, for example, the conductor 12, will be described. The attachment of the core 22 to the conductor 18 is the same as the attachment of the core 21 to the conductor 12 and will therefore be omitted. Further, since the cores attached to the horizontal linear conductors 13 and 17 are adhesively disposed so as to straddle the conductors 13 and 17, respectively, even if the adhesive is removed, it is unlikely that they will fall off. Don't think of special support. Since the core 21 has a U-shape, a recess 211 into which the conductor 12 is inserted is formed.

As shown in FIG. 3, the core support plate 31 includes a flat plate-shaped core support part 311 and a flat plate formed by extending one end of the core support part 311 and bending the core support part 311 substantially at right angles. It is provided with a core holding part 312. In the core supporting portion 311, a cutout portion 313 having a shape corresponding to the cross-sectional shape of the conductor 12 is formed so that the conductor 12 can be inserted.

As shown in FIG. 2, in the core support plate 31, after the conductor 12 is inserted into the cutout portion 313 and coupled to the conductor 12, the cutout portion 313 and the contact portion 314 of the conductor 12 are brazed. Thus, the core support plate 31 is fixed to the conductor 12.

After the adhesive is applied to the upper surface of the core supporting portion 311, the side surface of the core holding portion, and the surface of the conductor 12 above the core supporting portion 311, the conductor 12 is inserted into the recess 211 of the core 21. As described above, the core 21 is disposed on the core supporting portion 311, and the core 21 is bonded to the conductor 12 and the core supporting plate 31, whereby the attachment of the core 21 to the conductor 12 is completed.

As a second embodiment of the present invention, an attachment structure for attaching the core 23 shown in FIG. 10 to an arc-shaped conductor, for example, the conductor 15, will be described. Since the core 23 is also substantially U-shaped, a recess 231 into which the conductor 15 is inserted is formed. Since the plurality of cores 23 are attached so as to be sequentially adjacent to the arc-shaped conductor 15, the recess 231 is formed more than the thickness t1 on the side where the recess 23 1 into which the conductor 15 is inserted is formed. The thickness t2 on the non-existing side is increased. Note that H is the width of the core 23, and L is the length of the core 23.

As shown in FIG. 7, the core fixing plate 33 has a shape substantially corresponding to the shape of the core 23, the width is equal to the width H of the core 23, and the length is the length of the core 23. It is set to be longer than L by providing the pressing portion 33 3. At one end portion of the core fixing plate 33, a cutout portion 332 having a shape corresponding to the cross-sectional shape of the conductor 15 is provided, such as a recess 231 provided in the core 23 so that the conductor 15 can be inserted. There is. The other end of the core fixing plate 33 is provided with two linear cuts 331, and the other end is divided into three pressing portions 333.

As shown in FIG. 8, after inserting the conductor 15 into the cutout portions 332 of the plurality of core fixing plates 33, the contact portions 334 between the core fixing plates 33 and the conductors 15 are brazed to each other. Fix 33 to conductor 15. However, the interval between the core fixing plates 33 is selected so that one core 23 is inserted between the adjacent core fixing plates 33 and the core fixing plates 33 contact both sides of the inserted core 23.

Next, after applying an adhesive to the surface of the conductor 15 and both surfaces of the core fixing plate 33, the core 23 is arranged between the core fixing plates 33 so that the conductor 15 is inserted into the recess 231 of the core 23. First, the core 23 is pressed against the conductor 15. After that, as shown in FIG. 9, the three pressing portions 333 of each core fixing plate 33 are bent at substantially right angles in opposite directions, and the pressing portions 333 press the core 23 toward the conductor 15. , The attachment of the core 23 to the conductor 15 is completed, as shown in FIGS.

[0019]

[Effect of the device]

 As described above, in the core mounting structure for the heating coil according to the present invention, the core is bonded to the heating coil, and the core is arranged on the core support plate whose one end is brazed to the heating coil. It is set up.

Further, in another structure for attaching the core to the heating coil of the present invention, the core is adhered to the heating coil, and one end portion is brazed to the heating coil and the other end portion is the core. The heating coil is arranged between the core fixing plates that are bent so as to press them.

Therefore, according to the attachment structure of the core to the heating coil of the present invention, it is possible to prevent the core from falling off the heating coil when the adhesion of the core to the heating coil is released.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a perspective view of an embodiment of the present invention. However, the core is excluded.

FIG. 3 is a perspective view of a core support plate according to an embodiment of the present invention.

FIG. 4 is a perspective view of a core.

FIG. 5 is a plan view of another embodiment of the present invention.

6 is a side view taken along the line AA of FIG.

FIG. 7 is a perspective view of a core fixing plate according to another embodiment of the present invention.

FIG. 8 is an explanatory view showing a state where a core fixing plate of another embodiment of the present invention is attached to a conductor.

FIG. 9 is a perspective view of the core fixing plate with the pressing portion bent.

FIG. 10 is a perspective view of a core.

FIG. 11 is a schematic perspective view of a heating coil.

FIG. 12 is a perspective view of an upper portion of a multistage shaft.

[Explanation of symbols]

 21, 23 core 31 core support plate 33 core fixing plate 100 heating coil 333 pressing part

Claims (2)

[Scope of utility model registration request] 1. A structure for attaching a core to a high frequency induction heating coil, wherein the core is adhered to the coil and disposed on a core support plate having one end portion brazed to the coil. A structure for attaching a core to a high-frequency induction heating coil, which is characterized in that 2. A structure for attaching a core to a high frequency induction heating coil, wherein the core is adhered to the coil, one end portion is brazed to the coil, and the other end portion is the core. A structure for mounting a core to a high-frequency induction heating coil, wherein the structure is mounted between core fixing plates that are bent so as to press the core.