JPS636512Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an electromagnetic coupling device that interrupts and interrupts the transmission of power. It is valid.

[Conventional technology]

The electromagnetic clutch conventionally used in the refrigerant compressor of automobile cooling systems is as shown in Figure 1.
The terminal 1a of the electromagnetic coil 1 and the lead wire 25 of the electrical connector 21 are soldered on the inner surface of the yoke 2 (position indicated by A in FIG. 1), and the lead wire 25 is supported by a rubber pusher 22. The yoke 2 and the fixing member 4 can be pulled out from the yoke 2 and the fixing member 4.

Therefore, in this conventional electromagnetic clutch, the soldering part A must be performed inside the yoke 2, and the soldering must be performed between the lead wire 25, which is relatively weak and difficult to securely position and hold. These factors combined with the fact that automatic assembly by machine was difficult. Therefore, manufacturing had to be done manually, resulting in poor operability.

[Purpose of invention]

The present invention was devised in view of the above points, and aims to provide an electromagnetic coupling device that allows easy assembly of electrical connectors and extremely easy connection to external circuits. .

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

In FIG. 2, 1 is an electromagnetic coil, and 2 is a yoke for housing the coil 1, which is formed from iron material into a ring shape with a U-shaped cross section. An epoxy resin 3 is filled between the yoke 2 and the coil 1 to fix and hold the coil 1 in a state where it does not come into contact with the yoke 2. Furthermore, a ring-shaped fixing member 4 is welded to the bottom of the yoke 2, and when this fixing member 4 fits into a holding groove 6 formed in the housing 5 of the refrigerant compressor, the yoke 2 is fixed.
Note that 7 is a circlip that prevents the fixing member 4 from slipping out from the holding groove 6.

Further, reference numeral 8 is a rotating body disposed so as to cover the outer surface of the yoke 2 with a small gap therebetween, and its inner surface is rotatably supported by the housing 5 via a bearing 9. A pulley groove 10 is formed to engage the V-belt. Therefore, the rotating main body 8 receives the driving force of an automobile engine (not shown) via a belt to rotate. Note that 11 is a circlip that holds the inner race of the bearing 9 in the housing 5.

12 is a ring-shaped armature that faces the side surface of the rotating main body 8 with a minute gap therebetween;
2 is a rivet 14 on an iron ring 13 with an L-shaped cross section.
The iron ring 13 and the armature 12 are connected to the hub 16 via a cushion rubber 15.
is connected to. The hub 16 is connected to a rotating shaft 17 of the refrigerant compressor by a key 18, and is further fixed to the rotating shaft 17 with a nut 20 via a washer 19. Therefore, the armature 12 is integrally connected to the rotating shaft 17 via the iron ring 13, the cushion rubber 15, and the hub 16.

Therefore, current flows through electromagnetic coil 1 and coil 1
When is excited, a magnetic flux flows as shown by the broken line in FIG. The signal is transmitted from the rotation shaft 17 to the rotating shaft 17. Further, when the electromagnetic coil 1 is no longer energized, the armature 12 is pulled back by the elastic force of the cushion rubber 15, and the rotation of the rotating main body 8 is caused by the armature 12.
will no longer be transmitted.

Note that electricity is supplied to the electromagnetic coil 1 from an on-vehicle power supply, and this electricity is supplied to the electromagnetic coil 1 through an electrical connector 21 disposed between the fixing member 4 and the housing 5 on the outer surface of the fixing member 4. It is done through.

The connection structure between the electrical connector 21 and the coil terminal 1a will be described in detail below. In FIGS. 3 to 6, through holes 2a and 4a are formed in the bottom surface of the yoke 2 and the fixing member 4, respectively.
The coil terminal 1a held by the rubber bushing 22 is made to protrude outward from the fixing member 4 through the through holes 2a, 4a.

On the other hand, the fixing member 4 has two sets of fixing claws 4b, 4.
Since b', 4c, and 4c' are cut and bent outward in advance, an electrical connection can be made between these two sets of fixing claws 4b, 4b' and 4c, and 4c', as shown in FIG. After inserting the tool 21, first the first fixing claw 4c,
4c' is bent inward to fix the electrical connector 21 to the fixing member 4. This fixing is for temporarily fixing the electrical connector 21.

Next, as shown in FIG. 5, the coil terminal 1a is
The plate-like locking portions 23a, 23a' of the electrical terminals 23, 23' of the electrical connector 21 are soldered or fusing on the outside of the fixing member 4. Here, the plate-like locking parts 23a, 23a' are connected to the electric terminals 23,
A part of 23' is formed by folding it into one piece.
These plate-like locking parts 23a, 23a' and the electric terminal 23,
The coil terminal 1a is held between the coil terminal 23' and the terminal 23'. Also,
The fusing includes plate-like locking portions 23a, 23.
a' is heated in the same manner as electric resistance welding, and the plate-shaped locking portions 23a, 23a' are thermocompression bonded to the coil terminal 1a.

Further, the above-mentioned electric terminals 23, 23' are connected to resin electric connectors 21, as shown in FIG.
They are embedded and electrically insulated from each other. The ends of the electrical terminals 23, 23' protrude into the concave space 21a of the electrical connector 21, forming plug portions 23b, 23b' for electrical connection with an external circuit. One end (fifth
The upper end of the figure) is open to the outside, so that the recessed electrical terminal of the electrical connector of the external circuit (the circuit for receiving electricity from the on-vehicle power source) and the plug portions 23b and 23b' are directly fitted. can be attached and electrically connected.

As described above, after connecting the electrical terminals 23, 23' and the coil terminal 1a, as shown in FIG. The metal cover lid 24 is placed, and then the second fixing claws 4b, 4
b' is inserted into the holding hole 24a of the cover lid 24, and the second fixing claws 4b, 4b' are pushed apart to open the cover lid 24.
is fixed to the fixing member 4 via the electrical connector 21. Therefore, this cover lid 24 and the fixing claws 4b, 4
The effect of b' allows the electrical connector 21 to be more firmly fixed to the fixing member 4.

According to the embodiment structure described above, the electromagnetic coil terminal 1a and the electrical terminal 23 of the electrical connector 21 are joined outside the fixing member 4, and both terminals 1a, 23, 23' to be joined are Among them, the electrical terminals 23 and 23' of the electrical connector 21 have considerable strength and are securely held by the electrical connector 21, so that the coil terminal 1a and the electrical terminal 2
3, 23' can be soldered or fusing extremely easily and reliably.

At the same time, the electrical connector 21 can be fixed by simply bending and pushing the fixing claws 4b, 4b', 4c, 4c' outward from the fixing member 4, making the fixing work extremely easy. Therefore, it becomes possible to fix the electrical connector 21 by automatic assembly using a machine.

In the above example, the electromagnetic coupling device of the present invention was used to transmit power to the refrigerant compressor of an automobile cooling system, but the device of the present invention may also be used to transmit power to other rotating machines, and the electromagnetic coupling device It may also be used as a brake.

As explained above, the device of the present invention connects the terminal of the electromagnetic coil and the electrical terminal of the electrical connector outside the fixed member, and connects the terminal of the electromagnetic coil and the electrical terminal of the electrical connector. Since the two terminals are directly connected to each other without using a lead wire or the like, the connector has the excellent effect of being extremely easy to assemble. Therefore, in the device of the present invention, it is also possible to automatically assemble electrical connectors by machine as necessary.

Furthermore, since the end of the electrical terminal provided on the electrical connector is configured to protrude into the concave space of the electrical connector to form a plug for electrical connection with an external circuit, this plug can be connected to an external circuit. This has a great practical effect in that an electrical connection tool can be directly fitted to make an electrical connection to an external circuit.

Furthermore, in the present invention, in addition to fixing the electrical connector 21 to the fixing member 4 using the first fixing claws 4c and 4c', the electrical connector 21 is further fixed together with the lid member 24 using the second fixing claws 4b and 4b'. Since it is fixed to the fixing member 4, the first fixing claw 4 is
Temporarily fasten the electrical connector 21 by fixing it with c and 4c', and then connect the electromagnetic coil terminal 1a and the electrical terminal 2.
3, 23' can be reliably performed in a stable state, and then, as a second step, the electrical connector 21 is fixed together with the lid member 24 by the second fixing claws 4b, 4b'. Even if a strong fixing force (caulking force) is applied to the electrical connector 21 made of resin, the electrical connector 21 will not be damaged due to the presence of the lid member 24. A fixing force can be applied to the portion, and as a result, the resin electrical connector 21 can be firmly fixed, which is a great effect.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the main parts of a conventional electromagnetic clutch, FIGS. 2 to 6 are views showing an example of the device of the present invention, and FIG.
Fig. 3 is a side view showing the device shown in Fig. 2 with the electrical connector removed, Fig. 4 is a sectional view taken along the arrow A--A in Fig. 3, and Fig. 5 is an electrical connection of the device shown in Fig. 2. It is a partial cross-sectional front view showing a state in which the cover is assembled.
4 shows the state before assembly. FIG. 6 is a front view of main parts showing the state after the cover lid 24 is assembled. 1... Electromagnetic coil, 1a... Coil terminal, 2...
...Yoke, 2a...Through hole, 4...Fixing member, 4a
...Through hole, 21...Electrical connection tool, 21a...Concave space, 23, 23'...Electrical terminal, 23b, 2
3b'...Plug part, 24...Cover lid (lid member).

Claims (1)

[Claims for Utility Model Registration] An electromagnetic coupling device comprising an electromagnetic coil, a yoke that accommodates the electromagnetic coil, and a fixing member made of a metal material that fixes the yoke to a member to be attached, comprising: A through hole is provided in the fixing member, a terminal of the electromagnetic coil is made to protrude from the through hole to the outer surface of the fixing member, and a first fixing claw and a second fixing claw are provided around the through hole in the fixing member. A resin electrical connecting tool is formed to protrude outwardly, and a resin electrical connecting tool is disposed in a portion of the outer surface of the fixing member from which the electromagnetic coil terminal projects so as to engage with the first fixing pawl, and this electrical connection is made. A tool is fixed to the outer surface of the fixing member by deformation of the first fixing claw, and the electrical connector has a concave space with one end open to the outside, and an external circuit and an electrical connection projecting into the concave space. an electrical terminal having a plug portion to which the electromagnetic coil terminal is connected directly to the electrical terminal, and further having a holding hole on the electrical connector in which the second fixing claw engages. A lid member made of material is arranged, and this lid member is inserted into the holding hole and the second
An electromagnetic coupling device characterized in that the lid member, the electric connector, and the fixing member are fixed by being fixed to the outer surface of the fixing member by engagement of fixing claws.