JPH04125412U - Excitation device for electromagnetic coupling device - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the productivity of an excitation device for an electromagnetic coupling device. [Structure] The coil bobbin 15 is formed into a cylindrical shape, and an annular groove 16 for storing the electromagnetic coil 13 and a diode 1 are provided on the outer periphery of the coil bobbin 15.
4. A storage groove 17 is provided. Additionally, a bobbin cover 30 that closes the groove 17 is attached. The inner circumferential wall and outer circumferential wall of the annular groove portion 16 are formed by projecting walls 18 and 19, and the concave groove 17
Resin introduction holes 20 and 21 are provided in the side wall of the housing. The temporarily assembled coil bobbin 15 was attached to the field core 12, and resin 34 was injected. The excitation device 5 can be assembled with only simple operations, and the sealing and fixing work of the diode 14 and electric wires and the adhesion and fixing work of the coil bobbin 15 can be performed all at once.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

In this invention, the coil bobbin that holds the electromagnetic coil and diode is Regarding the excitation device for the electromagnetic coupling device inserted and fixed in the annular groove for the bobbin of the core, This concerns the structure of Irbobin.

0002

[Conventional technology]

Conventionally, as an electromagnetic coupling device, surge voltage generated when the electromagnetic coil is de-energized Some are equipped with diodes to suppress this. This diode is an exciter It was connected to the electromagnetic coil inside, and was attached to the coil bobbin along with the electromagnetic coil. For example, an excitation device with a built-in diode is disclosed in Japanese Utility Model Application Publication No. 49-5645. Something has been disclosed. This device has an electromagnetic coil wound around the outer circumference of the coil bobbin. It is constructed by inserting this cylindrical coil assembly into the annular groove of the field core. was. The flange on the insertion side of the coil bobbin has a cylindrical part that protrudes in the insertion direction. is integrally provided, and the diode is housed in the annular space formed inside this cylindrical part. It had been.

0003 To assemble this excitation device, first wind the electromagnetic coil around the coil bobbin. Pass the lead part through the insertion side flange of the coil bobbin to store the diode. Leads to annular space. Then, connect the diode and power supply lead wire to the lead part. and place the diode and wiring part inside the annular space (inside the cylindrical part of the coil bobbin). Place it. After that, the annular space is filled with resin and the resin is used to form a diode. Insulate and fix the wire connections. The coil assembly assembled in this way is Assembly is completed by attaching it to the annular groove of the lead core.

0004

[Problem that the idea aims to solve]

However, in the conventional excitation device configured in this way, the coil bobbin is Before attaching the diode and lead wires to each other, use resin to connect the diodes and lead wires. The problem is that the number of assembly steps is high and productivity is low because the coil bobbin is insulated and fixed to the coil bobbin. was there. Also, a power supply is provided to position the diode in place during resin injection. The supply lead wire had to be temporarily held, and the work efficiency was low during assembly. . It is also possible to temporarily fix the diode with insulating tape, etc. , it is not effective because it increases the work of pasting the insulating tape.

[0005]

[Means to solve the problem]

The excitation device for an electromagnetic coupling device according to the present invention has a coil bobbin formed into a cylindrical shape. There is an annular groove on the outer periphery that opens toward one end in the axial direction and into which the electromagnetic coil is inserted. The groove is disposed at the bottom end of the annular groove in the cylinder bobbin and opens radially outward. a groove formed in a series in the circumferential direction, and the opening of the groove is closed. A circular bobbin cover is attached to the inner circumferential wall and outer wall forming the annular groove. The peripheral wall is constructed by arranging a plurality of projecting walls extending in the axial direction at intervals in the circumferential direction. a side wall of the concave groove, an opening at the bottom surface of the annular groove portion and at the end surface of the coil bobbin. A resin introduction hole is provided and the diode lead is engaged and held at the bottom of this groove. The diode support member is provided protrudingly, and the lead of the electromagnetic coil is guided from the annular groove into the concave groove. The connection part between the lead part, the diode lead, and the power supply lead wire is housed in the groove. With the bobbin cover attached and inserted into the bobbin annular groove of the field core. The coil bobbin is then felt by resin injected from the opening side of the annular groove. It is fixed to the docore.

[0006]

[Effect]

The diode is placed in the annular space formed by the groove and the bobbin cover before resin injection. It is stored and temporarily fixed to the coil bobbin, and then passes from the annular groove through the resin introduction hole into the concave groove. It is fixed to the coil bobbin by the resin introduced into the coil bobbin. Additionally, an annular groove is constructed. The resin that flows out through the gaps between the protruding walls forming the The coil bobbin becomes the field core due to the resin flowing out to one end of the coil bobbin. Fixed with adhesive.

[0007]

【Example】

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 1 to 18. Figure 1 is a sectional view of an electromagnetic clutch equipped with an excitation device according to the present invention, and Figure 2 is a cross-sectional view of an electromagnetic clutch equipped with an excitation device according to the present invention. 3 is a sectional view taken along the line III-III in FIG. 2, and FIG. 4 is a rear view of the excitation device according to the present invention. A front view of a coil bobbin used in such an excitation device, FIG. 5 is a side view, and FIG. 6 is a side view. 7 is a sectional view taken along line VII-VII in FIG. 4, and FIG. 8 is a sectional view taken along line VIII-VII in FIG. VIII line sectional view, Figure 9 is an enlarged view of a part of the coil bobbin; 6, the same figure (b) is a view in the direction of the B arrow, the same figure (c) is the view in the direction of the C arrow, the same figure (d ) is a view from arrow D. 10 is a sectional view taken along the line E-E in FIG. 6, and FIG. 12 is a sectional view taken along line GG in FIG. 6, and FIG. 13 is a sectional view taken along line GG in FIG. 6. 14 is a sectional view taken along line I-I in FIG. 6, and FIG. 15 is a sectional view taken along line I-I in FIG. 6. 16 is a sectional view taken along line J-J, and FIG. 16 is a power supply cable used in the excitation device according to the present invention. Figure 3 shows the grommet for supporting the cable, in which figure (a) is a front view, figure (b) is a bottom view, and figure (b) is a bottom view. Figure (c) is a rear view, and figure (d) is a sectional view taken along the line DD in figure (b). Figure 1 7 is an electric circuit diagram of the excitation device according to the present invention, and FIG. 18 is an electric circuit diagram used in the excitation device according to the present invention. Figure (a) is a front view, and figure (b) is the same as figure (a). FIG. 3(c) is a sectional view taken along line C-C in FIG. child In these figures, the symbol 1 indicates an electromagnetic coupling device according to the present invention. This electromagnetic clutch 1 is attached to the car air conditioner compressor 2 and is connected to the engine. The rotation of the compressor (not shown) is transmitted to the rotating shaft 3 of the compressor 2, or the transmission is interrupted. It is configured as follows. A pulley is connected to the cylindrical portion 2a of the compressor 2 via a bearing 2b. A rotor 4 is rotatably supported, and an excitation device 5, which will be described later, is installed in an annular groove of the rotor 4. is inserted.

[0008] The rotary shaft 3 of the compressor 2 is provided with an abutment for transmitting the rotation of the rotor 4 to the rotary shaft 3. - Mature assembly 6 is mounted on the shaft. This armature assembly 6 has a rotary shaft 3 An armature hub 7 connected to the shaft end of the armature hub 7, and a leaf spring attached to this armature hub 7. The armature 9 is elastically supported via the armature 8.

[0009] As shown in FIGS. 1 to 3, the excitation device 5 is connected to the compressor 2 via a disk portion 11. A substantially cylindrical field core 12 that is screwed together, an electromagnetic coil 13 and a diode An annular groove that holds the field core 14 and is formed in the cylindrical portion of the field core 12 The coil bobbin 15 is attached to the coil bobbin 12a. The coil bobbin 15 is made of synthetic resin and has a substantially cylindrical shape as shown in FIGS. 4 to 7. It is integrally molded into a shape. The outer periphery of this coil bobbin 15 has an axial direction An annular groove 16 for storing the electromagnetic coil opens at one end, and an annular groove 16 opens toward the outside in the radial direction. , and grooves 17 formed in series in the circumferential direction of the coil bobbin 15 are provided. Note that one side wall of this groove 17 is constituted by the bottom wall of the annular groove portion 16, and the other side wall is constituted by the bottom wall of the annular groove portion 16. The side wall constitutes the axial end edge of the coil bobbin 15. And this groove 17 The opening width is sufficient to accommodate the diode, power supply lead wire, etc. described later. It is said to be the dimensions.

0010 The inner circumferential wall and the outer circumferential wall constituting the annular groove portion 16 extend in the axial direction. It is formed by arranging a plurality of projecting walls 18, 19 at intervals in the circumferential direction. Ru. Note that in this embodiment, the protruding walls 18 and 19 extend from the outer periphery and inner periphery of the annular groove portion 16 to 9 As shown in FIG. 8, the projecting wall 18 located on the inner peripheral side They are arranged in a staggered manner so that they do not overlap in the radial direction with the protruding wall 19 located on the outer peripheral side. has been done. In addition, a field core is provided at the tip edge of the projecting wall 19 located on the outer peripheral side. The retaining protrusion 19a pressed against the outer circumferential wall of the twelve annular grooves 12a is radially outward. It protrudes toward the side.

[0011] Both side walls of the groove 17 (bottom wall of the annular groove 16 and edge of the coil bobbin 15) , a resin penetrating through each side wall and opening at the annular groove 16 and the end face of the coil bobbin 15. Introductory holes 20 and 21 are formed respectively. These resin introduction holes 20 and 21 are shown in FIG. As shown in FIG. 6, a large number of coil bobbins are provided in the circumferential direction of the coil bobbin 15. 22 is for guiding the lead part of the electromagnetic coil from inside the annular groove part 16 to the concave groove 17 side. This coil lead outlet 22 is connected to the ring of the groove 17. There are two holes bored in the side wall on the side of the groove. Note that on the other side wall of the groove 17 6 and 9(b), As shown in (d), a cutout 23 is formed to make it easier to pull out the lead part. has been completed.

0012 24 is a diode support for temporarily fixing the diode 14 to the coil bobbin 15 9(c) and 14, this diode support body 24 has a concave groove 1 as shown in FIG. 9(c) and FIG. A U-shaped cross section integrally protrudes from the bottom of the diode 7 and engages and holds the lead of the diode 14. An engagement groove 24a is provided. The diode 14 is attached to this diode support 24. When the diode 14 is installed in a part isolated from the electromagnetic coil, However, it may be temporarily fixed to the coil bobbin 15 until the resin injection process described later. Become. Note that the lead of the diode 14 is connected to the lead of the electromagnetic coil using a crimp terminal, etc. Connected by crimped fittings.

[0013] 25 is a lead for temporarily fixing the two lead wires 26a of the power supply cable 26. As shown in FIG. 9(a) and FIG. In the same way as the diode support 24, two grooves are provided at the bottom of the groove 17. It is. Further, the lead wire of the power supply cable 26 is also connected to the lead wire support 25. An engagement groove 25a having a U-shaped cross section is provided to engage and hold the engagement groove 26a. In addition, Figure 6 As shown in FIG. A power supply cable support group, which will be described later, is placed between the lead wire supports 25. A notch 28 into which the rommet 27 fits is formed. Power supply cable 26 The two lead wires 26a are attached to the coil bobbin 15 via a grommet 27. , are guided into the groove 17 through the grommet 27. Then, in the engagement groove 25a, They are press-fitted and temporarily fixed, and their tips are wired along the groove 17 and connected to the Connected to diode 14. Note that one of these two lead wires 26a is 6 is wired clockwise, the other wire is wired counterclockwise, and the tip of each lead wire 26a The end is co-tightened to the connector that connects the lead of the diode 14 and the lead of the electromagnetic coil. connected to them. This electrical circuit is shown in FIG. In Figure 17, 2 9 shows a fitting for connecting electric wires.

[0014] The grommet 27 is integrally molded entirely from rubber, and is shown in FIGS. 16(a) to 16(d). ), there is a fixing part 27a having a U-shaped cross section, and two protruding parts provided on this fixing part 27a. It is formed from a cylindrical lead wire support part 27b. Moreover, the fixed part 27a , the whole is curved along the groove 17 as the attachment point. This grommet 27 connects the power supply cable 26 to the lead wire support portion 27b. With the wire 26a inserted, the fixing portion 27a is inserted into the groove 17 of the coil bobbin 15. It is attached to the coil bobbin 15 by fitting it into the coil bobbin 15. When installing, please The fixing part 27a is fitted into the notch 28 formed on the edge of the cylinder bobbin 15. cormorant. Further, the lead wire 26a passes through the groove 27c of the fixing part 27a and this grommet 2. 7 on both sides.

[0015] 30 is a bobbin cover for closing the opening of the groove 17, and this bobbin cover 30 is integrally molded from synthetic resin, and as shown in FIG. It is formed in a substantially annular shape. Note that the width A of the released portion is the same as that of the grommet 27. The dimensions are such that the fixing portion 27a is inserted therein. Also, this bobbin cover 30 The width dimension (length in the axial direction) is the dimension in which this bobbin cover 30 fits into the groove 17. It is said that Furthermore, on the inner circumference of this bobbin cover 30, as shown in FIG. 18(b), A recess 30a having an arcuate cross section facing radially inward is provided over the entire circumference. There is. 31 is a protruding piece for closing the notch 23 of the coil bobbin 15, and 32 is a coil bobbin. A protrusion for positioning the bobbin cover that fits into the positioning hole 33 formed in the bottle 15. , these are all provided integrally with the bobbin cover 30 as shown in FIG. 18(c). It is. The bobbin cover 30 configured in this way has a concave groove on the coil bobbin 15. The state in which the lead wire 26a of the power supply cable 26 and the diode 14 are housed in 17 As shown in FIG. 3, it is fitted into the groove 17 and attached to the coil bobbin 15. the In this case, insert the protruding piece 31 into the notch 23 and the protruding piece 32 into the positioning hole 33. At the same time, the grommet 27 is made to face the released part.

[0016] Next, a procedure for assembling the excitation device 5 configured as described above will be explained. . To assemble the excitation device 5, first, insert a cylinder into the annular groove 16 of the coil bobbin 15. Insert the electromagnetic coil 13 wound into a shape, and insert the lead part of the electromagnetic coil 13 into the coil. The lead is led out from the lead outlet 22 to the concave groove 17 side. Next, attach a dab to the lead part. Connect the leads of the diodes 14 and the lead wires 26a of the power supply cable 26 to the connecting tool 2. 9 and connect the diode 14 to the diode support 24 in the groove 17. The lead wires 26a are temporarily fixed to the lead wire supports 25, respectively. In addition, lead wire 2 6a is inserted into the grommet 27 in advance before connection. Also, this grommet 2 7 is inserted into the groove 17 after connecting the lead wire 26a and is temporarily fixed to the coil bobbin 15. It will be done. After completing the wiring work in this way, attach the bobbin cover to the coil bobbin 15. 30 to close the groove 17. Then, this temporarily assembled coil bobbin 15 is It is inserted into the annular groove 12a of the field core 12 from the concave groove 17 side. In this case, the power supply Insert the lead wire 26a of the supply cable 26 into the cable hole 12b of the field core 12. Insert it in advance. Note that as the coil bobbin 15 is inserted, the projecting wall 1 The retaining protrusion 19a of No. 9 comes into contact with the opening edge of the annular groove 12a. By continuing to insert the bobbin 15, the tip of the protruding wall 19 will be moved inward in the radial direction. Since the coil bobbin 15 is bent to the side, the entire coil bobbin 15 is stored in the annular groove 12a as shown in FIG. can do. At that time, the lead wire support portion 27b of the grommet 27 is inserted into the cable hole 12b of the cable core 12. In this way, the coil bobbin 15 is When installed, the coil bobbin 15 has the retaining protrusion 19a attached to the field core 12. Since it is pressed against the annular groove 12a, it cannot easily come out from the annular groove 12a. In other words, The coil bobbin 15 can be temporarily fixed to the field core 12.

[0017] After temporarily fixing the coil bobbin 15 to the field core 12 in this way, as shown in FIG. A resin indicated by reference numeral 34 is injected into the annular groove 16 of the coil bobbin 15 and hardened. child The resin 34 passes from the annular groove 16 between the projecting walls 18 and between the projecting walls 19. It contacts the inner peripheral surface and outer peripheral surface of the annular groove 12a. In addition, a part of the resin 34 is annular. The resin flows from the groove 16 through the resin introduction hole 20 to the groove 17 and is filled in the groove 17, From there, the resin further passes through the resin introduction hole 21 and flows out of the coil bobbin. In other words, this When the resin 34 hardens, the coil bobbin 15 is attached to the field via this resin 34. It is adhesively fixed to the core 12, and the diode 14 and electric wires in the groove 17 are sealed. It will be fixed. Note that the grommet 27 is also attached to the coil bobbin by the resin 34. It is fixed at 15. After curing the resin 34 in this way, the assembly of the excitation device 5 is completed. do.

[0018] In the electromagnetic clutch 1 incorporating the excitation device 5 assembled in this way, the electromagnetic clutch When the coil 13 is demagnetized, the armature 9 is pulled by the leaf spring 8 as shown in FIG. Since the rotor 4 is stretched and separated from the rotor 4, in this case, the rotation of the rotor 4 is caused by the rotation axis 3. is not transmitted. Then, when the electromagnetic coil 13 is energized from this state, the rotor A magnetic flux is generated between 4 and armature 9 as indicated by Φ in the figure, and armature 9 moves toward the rotor. 4 is magnetically attracted. At this time, the rotation of the rotor 4 is rotated via the armature 9. The signal is now transmitted to the shaft 3.

[0019] In the excitation device 5 configured as described above, the diode 14 is is temporarily fixed to the coil bobbin 15 by the diode support 24, and the annular groove 16 The resin 34 introduced into the groove through the resin introduction hole 20 from the coil bobbin 1 Fixed to 5. Furthermore, the spaces between the projecting walls 18 constituting the annular groove portion 16 and The resin 34 that has flowed out between the two protruding walls 19 and the resin introduction hole 2 from the groove 17 The resin 34 flowing through the coil bobbin 15 to one end side of the coil bobbin 15 causes the coil bobbin to The tube 15 is adhesively fixed to the field core 12. Therefore, the excitation device 5 is temporarily assembled. All work other than the wiring work can be done by inserting. , just by pouring the resin 34 into the coil bobbin 15 after temporary assembly, the diode 14 It is possible to seal and fix wires and wires, and also to attach the coil bobbin 15 to the field core. It can be adhesively fixed to 12.

[0020]

[Effect of the idea]

As explained above, the excitation device for an electromagnetic coupling device according to the present invention has a coil bobbin. It is formed into a cylindrical shape, and an electromagnetic coil is inserted into the outer periphery with an opening toward one end in the axial direction. an annular groove, and a diameter of the coil bobbin. A concave groove that opens outward in the direction and is formed in a series in the circumferential direction. A substantially annular bobbin cover that closes the opening of the groove is attached to form the annular groove. The inner circumferential wall and outer circumferential wall of the The bottom surface of the annular groove and the coil bore are formed on the side wall of the groove. A resin introduction hole that opens on the end face of the bottle is provided, and a diode receptacle is installed at the bottom of this groove. A diode support member is provided that protrudes to engage and hold the diode, and the diode support member is guided from the annular groove into the concave groove. Connect the lead part of the electromagnetic coil, the lead of the diode, and the power supply lead wire. The bobbin cover is attached with the connecting part stored in the groove, and the field core bobbin is removed. The coil bobbin inserted into the annular groove for bottles is Because it was fixed to the field core with resin, the diode was placed in a groove before resin injection. and the bobbin cover, and are temporarily fixed to the coil bobbin. , the resin is introduced from the annular groove into the concave groove through the resin introduction hole, and the coil bobbin is Fixed to . In addition, the water flows out through the spaces between the protruding walls that make up the annular groove. and the resin that flowed from the concave groove to one end of the coil bobbin through the resin introduction hole. The coil bobbin is adhesively fixed to the field core. Therefore, the excitation system When temporarily assembling the unit, all work other than the wiring work can be done by inserting. Ru. Moreover, by simply pouring resin into the coil bobbin after temporary assembly, diodes and Electrical wires can be sealed and fixed, and the coil bobbin can be bonded to the field core. Can be fixed. Therefore, it is possible to assemble the excitation device 5 with only simple work. This improves work efficiency. What's more, you can die by simply injecting the resin and curing it. We carry out all the sealing and fixing work of cables and wires, as well as the gluing and fixing work of coil bobbins. Because you can do this, you can increase productivity. Also, the diode is inside the groove. Since it is sealed with resin and firmly fixed to the coil bobbin, it has excellent moisture resistance and It also has the effect of improving vibration resistance and vibration resistance.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an electromagnetic clutch equipped with an excitation device according to the present invention.

FIG. 2 is a rear view of the excitation device according to the present invention.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a front view of a coil bobbin used in the excitation device according to the present invention.

FIG. 5 is a side view of a coil bobbin used in the excitation device according to the present invention.

FIG. 6 is a rear view of a coil bobbin used in the excitation device according to the present invention.

7 is a sectional view taken along the line VII-VII in FIG. 4. FIG.

8 is a sectional view taken along line VIII-VIII in FIG. 5. FIG.

9 is an enlarged view of a part of the coil bobbin used in the excitation device according to the present invention, where (a) is a view in the direction of arrow A in FIG. 6, (b) is a view in the direction of arrow B in FIG. The figure (c) is a view in the direction of arrow C, and the figure (d) is a view in the direction of arrow D.

FIG. 10 is a sectional view taken along line E-E in FIG. 6;

11 is a sectional view taken along line FF in FIG. 6. FIG.

12 is a sectional view taken along line GG in FIG. 6. FIG.

13 is a sectional view taken along line H-H in FIG. 6. FIG.

14 is a cross-sectional view taken along the line II in FIG. 6. FIG.

15 is a sectional view taken along line J-J in FIG. 6. FIG.

FIG. 16 is a diagram showing a grommet for supporting a power supply cable used in the excitation device according to the present invention, where (a) is a front view, (b) is a bottom view, and (c) is a rear view. , (d) of the same figure is a sectional view taken along the line DD in figure (b).

FIG. 17 is an electrical circuit diagram of an excitation device according to the present invention.

FIG. 18 is a diagram showing a bobbin cover used in the excitation device according to the present invention, in which FIG. 18(a) is a front view, FIG. 18(b) is a sectional view taken along line B-B in FIG. c) is (a)
It is a sectional view taken along the line CC in the figure.

[Explanation of symbols]

1 Electromagnetic clutch 5 Excitation device 12 Field Core 12a Annular groove 13 Electromagnetic coil 14 Diode 15 Coil bobbin 16 Annular groove part 17 Groove 18 Projection wall 19 Projection wall 20 Resin introduction hole 21 Resin introduction hole 24 Diode support 26a Lead wire 30 Bobbin cover 34 Resin

Claims (1)

[Scope of utility model registration request] 1. An excitation device for an electromagnetic coupling device in which a coil bobbin holding an electromagnetic coil and a diode is inserted and fixed in a bobbin annular groove of a field core, wherein the coil bobbin is formed into a cylindrical shape, and an axial direction An annular groove that opens toward one end and into which the electromagnetic coil is inserted; and a recess that opens toward the outside in the radial direction and is formed in a series in the circumferential direction, and is disposed at the bottom end of the annular groove in this coil bobbin. a groove, and a substantially annular bobbin cover that closes the opening of the groove, the inner peripheral wall and the outer peripheral wall constituting the annular groove, and the protruding wall extending in the axial direction in the circumferential direction. Formed by arranging multiple pieces at intervals,
A resin introduction hole is provided on the side wall of the groove, and the resin introduction hole opens to the bottom surface of the annular groove and the end surface of the coil bobbin. A diode support member that engages and holds a diode lead is protruded from the bottom of the groove, and the groove is extended from the annular groove. The lead part of the electromagnetic coil guided inside, the lead part of the diode, and the connection part with the power supply lead wire are housed in the groove, the bobbin cover is attached, and the bobbin cover is inserted into the annular groove for the bobbin of the field core. An excitation device for an electromagnetic coupling device, characterized in that a coil bobbin is fixed to a field core by resin injected from the opening side of an annular groove.