JPS6325216B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an excitation device for an electromagnetic coupling device, and its purpose is to provide a function to prevent the rotor of a bobbin around which an excitation coil is wound, and to prevent a terminal block, which is a power supply terminal of the excitation coil, from rotating. The purpose is to achieve the holding function with a simple and inexpensive configuration.

Hereinafter, a coil rotating type magnetic particle type electromagnetic coupling device will be described in detail with reference to FIGS. 1 to 6 as an example.

In each figure, 1 is a drive rotor having a connecting part that is a yoke that houses and holds an excitation coil, which will be described later.A pair of rotor members 1a and 1b each having a ring-shaped recess formed on one side are welded together. It is configured by being fixed by etc. A through hole 1c is formed in one side of one rotor member 1b, and an oval-shaped recess 1d is formed in one side of the recess so as to surround the through hole 1c. An excitation coil 2 is housed in a recess 3 formed in the drive rotor 1 and fixed to the recess 3 with resin 4, and is wound around a bobbin 5 made of synthetic resin. This bobbin 5 has a pair of flanges 5a and 5b, and a protrusion 5 extending in the axial direction is provided on the outer surface of one of the flanges 5b on the de-excitation coil side.
c are provided at two locations on the circumference, and these protrusions 5
c is provided with an insertion hole 5d into which a terminal block to be described later is inserted, and the protruding portion 5c is provided with notches 5e ₁ and 5e ₂ that communicate in the radial direction, and a notch 5e ₂ on the outer peripheral side.
penetrates the collar 5b in the axial direction. In addition, the protrusion 5c
A pair of protrusions 5f are provided on the outer side thereof, and an extraction hole 5g for taking out one outlet 2a of the excitation coil 2 is provided at the lower part of one of the collars 5b. These protruding portions 5c insertion holes 5d, notches 5e ₁ ,
5e ₂ , the protrusions 5f are formed at two symmetrical positions on one collar 5b. 5h is a pair of tsuba 5a,
These are arcuate recesses formed at several locations in 5b. 6
1 and 62, two outlet portions 2a (only one is shown) of the excitation coil 2 are connected by solder to the bobbin 5.
As shown in FIGS. 5a and 5b, the two terminal blocks are inserted into and held in the insertion holes 5d of each protruding part 5c.
b is formed. The bobbin 5 on which the excitation coil 2 is wound is placed in the recess 3 of the drive rotor 1 with a resin 4.
The terminal blocks 61 and 62 are inserted into the insertion hole 5d of the protrusion 5c, and are fixed with the resin 4 with the female screw 6b side exposed to the outside of the drive rotor 1. At this time, the gap between the terminal blocks 61, 62 and the peripheral wall of the through hole 1c is filled with the resin 4, and the terminal blocks 61, 62 are insulated and supported with respect to the rotor 1. 7 is a driven rotor which is the second connection main body, and there is an annular gap g between it and the driving rotor 1.
, and magnetic particles 8 are enclosed in this annular gap g. 9, this driven rotor 7 is connected to the bolt 1
An unillustrated shaft is fixed with the driven shaft fixed by 0. A bracket 11 is fixed to the other side of one rotor member 1b by a screw 12, and a bearing 13 is pressed and fixed between the bracket 11 and the driven shaft 9.

14 is a holder fixed to the side of the bracket 11 with a screw 16 via a plate 15;
18 is a pair of slip rings attached to the holder 14 via a molding material 19; 20 is one lead terminal for electrically connecting one slip ring 17 and one terminal block 61; and 21 is the other slip ring 18. and the other terminal block 62, and these lead terminals 20,
21 uses a rectangular plate made of aluminum material. One end of each of these lead terminals 20, 21 is welded to a slip ring 17, 18, respectively.

22 is a screw for attaching each other end of each lead terminal 20, 21 to the terminal block 61, 62, and 23 is an insulating tube inserted into and covering each lead terminal 20, 21.

Next, the operation will be explained.

Slip springs 17, 1 are connected to a power supply (not shown).
8, lead terminals 20, 21, terminal blocks 61, 62,
When a current is passed through each outlet 2a and the excitation coil 2 is excited, a magnetic flux Φ flows through the magnetic path shown by the dotted line, and this magnetic flux Φ solidifies the magnetic particles 8, so that the driving rotor 1 and the driven rotation The children 7 are connected and power is transmitted.

Here, the rotation prevention structure of the bobbin 5 including the excitation coil 2 relative to the recess 3 of the drive rotor 1 and the holding structure of the terminal blocks 61 and 62, which are the power supply terminals of the excitation coil 2, will be explained.

First, when winding a winding around the bobbin 5, the beginning of the winding, that is, one outlet 2a of the excitation coil 2 is taken out from the outlet hole 5g, and the winding is wound to form the excitation coil 2. form. After winding, one end of one outlet 2a is inserted into the groove 6a of the terminal block 61 and connected by soldering, and the other outlet (end of winding) is also inserted into the groove of another terminal block 62. 6
Insert into a and connect.

Next, the groove 6a side of each terminal block 61, 62 is inserted into the insertion hole 5d of each protrusion 5c and temporarily fixed. At this time, one outlet 2a is guided and held in the notch _5e1 between the protrusions 5c, and the other outlet is guided and held in the notch _5e2 between the protrusions 5c. Then, the bobbin 5 to which the terminal blocks 61 and 62 are temporarily fixed and containing the excitation coil 2 is stored in the ring-shaped recess of one rotor member 1a, and then the bobbin 5 containing the excitation coil 2 is stored in the ring-shaped recess of the other rotor member 1b.
is butted against one rotor member 1a, and the bobbin 5 is housed in the recess 3 of the drive rotor 1. At this time, each terminal block 61, 62 is inserted into the through hole 1c of the other rotor member 1b, and a part of the female screw 6b side protrudes to the outside. Moreover, each protrusion 5c has a second
As shown in the figure, it fits into the oval-shaped recess 1d of the other rotor member 1b, and its protrusion 5f engages with the left and right inner sides of the oval-shaped recess 1d with a predetermined elastic force, and the bobbin for the drive rotor 1 is fitted into the oval-shaped recess 1d. It performs the anti-rotation function of 5.
In the above state, liquid resin is injected into the recess 3 of the drive rotor 1 from several external locations to fill the gaps between the excitation coil 2 and the drive rotor 1, the gap between the bobbin 5 and the drive rotor 1, etc. Fill it and heat the liquid resin to harden it. As a result, the bobbin 5 containing the excitation coil 2 is housed and fixed in the recess 3 of the drive rotor 1 by the hardened resin 4, and at the same time the terminal block 6
1 and 62 are fixed to the through hole 1c of the drive rotor 1 with the hardened resin 4 with the female screw 6b side exposed to the outside.

By the way, when connecting the driving rotor 1 and the driven rotor 7, not only each connecting part but also the driving rotor 1
The temperature of the driven rotor 7 increases to an extremely high temperature due to heat generation. In particular, the drive rotor 1 is significantly heated by the Joule heat generated in the excitation coil 2 and the above-mentioned heat generation, and therefore the resin 4 in the recess 3 is softened by the above-mentioned heating, and the bobbin 5 and The fixation of the terminal blocks 61 and 62 is released. Therefore, the bobbin 5 and the terminal blocks 61, 62 move within the recess 3 and through hole 1c due to the rotational action of the drive rotor 1. and terminal blocks 61 and 62 (6th soldering part)
(24 parts shown in the figure), and furthermore, large stress acts on the terminal blocks 61, 62 and the fixing parts of the lead terminals 20, 21, resulting in disconnection of each outlet part 2a, and the soldering part 2.
4 and lead terminals 20 and 21 to break.As a result, the excitation coil 2 cannot be excited and a connection operation cannot be obtained.

However, in this embodiment, there are protrusions 5c at two locations on the collar 5b of the bobbin 5 around which the excitation coil 2 is wound.
These protrusions 5c are fitted into the oval-shaped recesses 5d of the drive rotor 1, and the outer part 2 of the protrusions 5c is
Since the bobbin 5 is positioned at a predetermined position in the recess 3 of the drive rotor 1 by engaging the protrusions 5f at the left and right inner sides of the oval-shaped recess 5d, the bobbin 5 will not move even if the resin 4 softens. There's nothing to do. Moreover,
Since the terminal blocks 61 and 62 are inserted and held in the insertion holes 5d between the protrusions 5c, each terminal block 61 and 62 is positioned at a predetermined position in the through hole 1c of the drive rotor 1 in conjunction with the positioning of the bobbin 5 described above. Therefore, each outlet 2a, each outlet 2a, and the terminal blocks 61, 62
There is almost no large stress acting on the soldered parts 24 and the fixing parts of the terminal blocks 61, 62 and the lead terminals 20, 21, and each outlet part 2a
Disconnection of the excitation coil 2, peeling of the soldered part 24, and breakage of the lead terminals 20 and 21 can be prevented.
can be reliably excited. In addition, the terminal block 6
1 and 62 are inserted and held in the insertion hole 5d of the protruding part 5c, and are located approximately in the center of the through hole 1c of the drive rotor 1. Therefore, the resin 4 of a predetermined thickness is placed around the terminal blocks 61 and 62. The layer can be reliably formed, and the layer of resin 4 allows the terminal block 6, both of which are conductive materials, to be formed.
1, 62 and the drive rotor 1 can be reliably protected from insulation. In addition, the protrusion 5c, insertion hole 5d, protrusion 5f, and notches 5e ₁ and 5e ₂ that function to prevent the bobbin 5 from rotating can be integrally formed by molding when the bobbin 5 is formed, so they can be manufactured easily and inexpensively without any increase in cost. It's not what it is.

Although the coil rotating type magnetic particle type electromagnetic coupling device has been described above, it can also be applied to a hysteresis type eddy current type, friction type, etc. other than the magnetic particle type, and similar effects can be obtained.

As described above, according to the present invention, by engaging the protrusion provided on the bobbin with the recess provided in the recess of the rotor, the bobbin can be reliably prevented from rotating and can be held fixed at a predetermined position. In addition, by inserting and holding the terminal block to which the excitation coil outlet is connected to the insertion hole provided in the protrusion so that one end is exposed outside the rotor, the bobbin is fixed and held. Similarly to the bobbin, the terminal block can also be fixed and held in place. Therefore, damage such as disconnection of each outlet can be prevented, and the resin can reliably insulate between the rotor made of conductive material and the terminal block, and special fixing means for the terminal block can be used. becomes unnecessary.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is an inside view of the rotor member 1b, FIG. 3 is an outside view of the bobbin 5, and FIG. 4 is a cross section taken along the line of FIG. 5A and 5B are a sectional view and a left side view of the terminal blocks 61 and 62, and FIG. 6 is a structural diagram showing the soldering portion 24 between the terminal blocks 61 and 62 and the outlet portion 2a. In the figure, 1 is the drive rotor, 1c is the through hole, 1
d is an oval recess, 2 is an excitation coil, 2a is an outlet, 3 is a recess, 4 is resin, 5 is a bobbin, 5c is a protrusion, 5d is an insertion hole, 5e ₁ and 5e ₂ are notches, 5
f is a protrusion, 5g is an extraction hole, 61 and 62 are terminal blocks,
7 is a driven rotor. Note that the same reference numerals in each figure indicate the same parts.

Claims (1)

[Claims] 1. A rotor having a recess inside, a through hole formed on the side in communication with the recess, and a recess formed around the inner surface of the through hole, this rotor and a gap The coupling body is arranged opposite to each other and connected to the rotor, and has a protrusion protruding toward the outer periphery and an insertion hole formed in the protrusion. a bobbin disposed with a protrusion engaged with the recess; an excitation coil wound around the bobbin to generate magnetic flux to connect the rotor and the coupling body; A terminal block made of a conductive material, the other end of which is exposed and extended with a gap from the peripheral wall of the through hole, is inserted into the insertion hole, and is connected to the outlet of the excitation coil, and the rotor. 1. An electromagnetic coupling device comprising a resin that is filled inside the bobbin and fixes the bobbin and the terminal block and insulates and supports the terminal block with respect to the rotor.