JPH0719685B2 - Electromagnetic clutch coil connection structure - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil connection structure for an electromagnetic clutch, and more particularly to an electromagnetic clutch for intermittently transmitting the rotational force of an engine to a refrigerant compressor of a refrigeration system for automobile air conditioners. It is suitable for use in the exciting coil of.

[Conventional technology]

Conventionally, the coil connection structure of this type of electromagnetic clutch is as shown in FIG. 9, in which the exciting coil of the electromagnetic clutch is housed in the housing 110, and the holes 103 and 104 formed in the housing 110 are used to The winding start line 101 and the winding end line 102 of the exciting coil are guided to the outside.

On the other hand, the mounting bracket 106 connected to the lead wire connector 105 is arranged along the plane of the housing 110 in the normal direction (radial direction) of the outer peripheral surface of the housing 110 and fixed on the outer surface of the housing 110. In FIG. 9, 44 is a housing 11
A ring-shaped fixing plate that is integrally fixed to 0
Is attached to the compressor case, and the connector 105 and the mounting bracket 106 are arranged in the notch of the fixing plate 44.

The winding start line 101 and the winding end line 102 guided to the outside from the holes 103 and 104 were bent parallel to the plane of the housing 110 and then crimped and fixed to the crimped portions 107 and 108 of the mounting bracket 106.

[Problems to be Solved by the Invention]

In the conventional structure described above, the connector 105 and the mounting bracket 106 are arranged on the outer surface (flat surface portion) of the housing 110 in the normal direction to the outer peripheral surface (circular surface) of the housing. The structure projects from the surface to the outside. As a result, if an external force is applied to this projecting portion by an external force for some reason such as an assembly process in a factory or after mounting on a vehicle, this projecting portion has a low rigidity and is easily deformed, so that the mounting bracket 106 and The connecting part with the coil lead wires 101, 102 has come off, or the coil lead wires 101, 102
There were cases where problems such as cutting off occurred.

Further, in the electromagnetic clutch, since the rotor is arranged close to the outer peripheral side of the housing 110 with a minute gap therebetween, there may occur a problem that the lead wire of the connector 105 comes into contact with this rotor (rotating body). Further, although the rotor is provided with a pulley for receiving power from the vehicle engine, there is a problem that the installation site of the pulley is significantly restricted by the presence of the protruding portion.

Although it is conceivable to increase the outer diameter of the housing 110 in order to solve the above-mentioned problem, this measure is not practical because it causes an increase in the weight and size of the electromagnetic clutch.

Further, in the conventional structure, since the caulked portions 106 and 107 of the mounting bracket 106 and the coil lead wires 101 and 102 are directly exposed to the outside, these portions are easily scratched by contact with external foreign matter, and due to water from the outside or the like. Coil leader 10
There is a problem such as an electrical short between 1 and 102.

It is an object of the present invention to provide a coil connection structure for an electromagnetic clutch that can solve the above-mentioned problems.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides: (1) (a) a ring-shaped housing having a recess for accommodating a coil of an electromagnetic clutch; and (b) a recess in the housing. (C) a hole provided in the housing so as to pass through the outer surface of the housing and the recess, and (d) fixed in the hole of the housing, A coil end supporter that supports the end of the lead wire; and (e) is supported on the outer surface of the housing by the coil end supporter and is arranged so as to face the tangential direction of the outer peripheral surface of the housing, A mounting member for fixing the wire; (f) a lead wire connected to the mounting member so as to face in a tangential direction of the outer peripheral surface of the housing; (g) the mounting metal on the outer surface of the housing. Adopt the technical means of a cover which to consist fixed insulating material so as to cover the connection portion between the fixing portion and the mounting member and the lead wire of the lead wire.

[Advantageous effects of the invention]

According to the above technical means, since the mounting metal fitting and the lead wire are arranged on the outer surface of the housing that houses the coil so as to face the tangential direction of the outer peripheral surface of the housing, the mounting metal fitting and the lead wire are disposed on the outer peripheral surface of the housing. Does not project radially from the surface.

As a result, an external force is not applied to the protruding portion as in the conventional structure, and a problem such as cutting of the coil lead wire does not occur.

Further, since there is no protruding portion unlike the conventional structure, there is no restriction on the installation site of the pulley installed on the rotor, and the pulley can be installed closer to the outer surface side of the housing.

In addition, the fixed part between the mounting bracket and the coil lead wire and the connecting part between the mounting bracket and the lead wire are covered with an insulating cover to prevent them from being exposed to the outside. It is possible to surely protect from an electric short circuit, and also to prevent an electric short circuit accident due to water.

〔Example〕

Next, an embodiment in which the present invention is applied to an exciting coil of an electromagnetic clutch for intermittently transmitting a rotational force of an engine to a refrigerant compressor of an automobile air-conditioning refrigeration system will be described with reference to the drawings.

FIG. 2 shows a cross-sectional view of the electromagnetic clutch 1, which includes a first rotating portion 2 that is driven by an engine (not shown) to rotate,
The second rotating part 3 that drives a refrigerant compressor (not shown) that is a driven device, and the first rotating part 2 that generates a magnetic force when energized.
And an exciting coil portion 4 for engaging the second rotating portion 3 with each other.

The first rotating portion 2 has a concave portion 21 that opens to the side (left side in FIG. 2).
A rotor 21 having a ring shape having a U-shaped cross section having a is provided. The rotor 21 is made of a magnetic iron material,
It is rotatably supported by a ball bearing 22 on a cylindrical protrusion formed on the case (not shown) of the refrigerant compressor. Further, a pulley 23 that engages with a V-belt (not shown) that is constantly driven by the engine is fixed to the outer periphery of the rotor 21 by joining means such as welding. Therefore, the rotor 21 receives the rotational force of the engine via the V-belt and rotates.

The second rotating portion 3 includes a ring-shaped friction plate 31 that faces the right side surface of the rotor 21 in the drawing with a minute gap therebetween. The friction plate 31 is made of an iron material which is a magnetic material, and is connected to an iron ring 33 by a rivet 32. The ring 33 has an L-shaped cross section having a flange portion 33a whose inner circumference is parallel to the axial direction, and a ring-shaped cushion member 34 made of rubber or the like has an adhesive agent on the inner circumference of the flange portion 33a. It has been fixed using. A rotary plate 35 having a flange portion 35a parallel to the flange portion 33a of the ring 33 is fixed to the inner circumference of the cushion member 34 using an adhesive. The cushion member 34 plays a role of separating the friction plate 31 from the rotor 21 when the exciting coil unit 4 does not generate a magnetic force, and also elastically deforms when the friction plate 31 is connected to the rotor 21 to mitigate the impact at the time of rotation start. Play a role in. On the other hand, the inner periphery of the rotary plate 35 is non-rotatably fitted to the drive shaft (not shown) of the refrigerant compressor,
The drive shaft is integrally fastened with a bolt (not shown). As described above, when the rotor 21 and the friction plate 31 are engaged with each other, the rotational power transmitted to the rotor 21 is transmitted to the drive shaft, and the refrigerant compressor is driven.

The excitation coil unit 4 includes a coil 42 formed by winding a single wire (enamel wire) applied with enamel paint around a resin winding frame 41 to form a ring shape.

The housing 43 is made of iron to form a part of the magnetic circuit, and is formed in a ring shape with a U-shaped cross section having a recess 43a opening to the side (right side in FIG. 2). The winding frame 41 holding the coil 42 is housed in the recess 43a of the housing 43, and the winding frame 41 is fixed by the resin 41a.
The housing 43 is arranged in the recess 21a of the rotor 21 with a minute gap. A ring-shaped iron fixing plate 44 is joined to the side of the housing 43 (left side in the drawing) by welding, and the fixing plate 44 is fixed to the case of the refrigerant compressor. That is, the housing 43 is fixed to the fixed plate 44.
Is fixed to the case of the compressor via.

Next, a connection structure between the coil 42 and a lead wire for supplying a current to the coil 42 will be described with reference to FIGS.

Outer surface of housing 43 (flat surface on the left side in FIG. 2) and recess 43a
A hole 43b penetrating the inside and the inside is provided in the housing 43, and a resin coil integrally formed with the winding frame 41 as shown in FIGS. 1, 2, and 3 is provided in the hole 43b. An end support 6 is provided. A winding start line 42a and a winding end line 42b, which are lead lines of the coil 42, project outside the housing 43 through the support 6.

Here, the coil end supporter 6 supports the respective ends of the winding start line 42a and the winding end line 42b of the coil 42 protruding from the housing 43 in a direction substantially perpendicular to the outer surface of the housing 43. The ends of the winding start line 42a and the winding end line 42b are supported side by side in the radial direction of the housing 43 by guide grooves 61a and 61b formed in the coil end support 6, as shown in FIG. In addition, the coil end support 6 includes a first mounting member 71a and a second mounting member 71a which are connected to lead wires 51a and 51b, which will be described later.
Metal fitting holding grooves 62a, 62b for supporting the mounting metal fitting 71b (Fig. 3)
Are formed.

The first mounting bracket 71a and the second mounting bracket 71b are made of a conductive material such as copper, and as shown in FIG. 4 and FIG.
The front end is provided with a first caulking portion 72a and a second caulking portion 72b that sandwich the ends of the winding start line 42a and the winding end line 42b, and the first mounting bracket 71a and the second mounting bracket 71b are The projections 73a and 73b to be inserted into the metal fitting holding grooves 62a and 62b of the coil end support 6 are integrally provided. Therefore, by inserting the protrusions 73a and 73b into the metal fitting holding grooves 62a and 62b of the support 6, the first caulking portion 72a and the second caulking portion 72b are supported in a direction substantially perpendicular to the outer surface of the housing 43. At the same time, the ends of the winding start line 42a and the winding end line 42b are arranged on the first caulking portion 72a and the second caulking portion 72b (see FIG. 1). Furthermore, the first lead wire 51a and the second lead wire 51b are attached to the first mounting bracket 71a and the second mounting bracket 71b.
Insulating portion fixing portions 74a, 74b for crimping the insulating portions 52a, 52b of the first and second metal wires 53a, 53b of the first lead wire 51a and the second lead wire 51b.
Metal wire fixing portions 75a and 75b for crimping are integrally provided. The other end of the first lead wire 51a has a coupler 54 connected to the controller of the refrigeration system as shown in FIG.
a is attached, and the other end of the second lead wire 51b is attached with a ground metal fitting 54b connected to the vehicle body. The first mounting bracket 71a and the second mounting bracket 71b are previously assembled integrally with the resin fixture 8.

The resin fixture 8 includes a first holding portion 81 for sandwiching and holding the metal wire fixing portions 75a and 75b obtained by crimping the metal wires 53a and 53b.
The second holding portion 8 that holds the lead wire insulating portions 52a and 52b by sandwiching them.
2 and 1 are integrally molded, and the first caulking portion of the metal fitting 71a
As shown in FIG. 4, between the 72a and the second caulking portion 72b of the metal fitting 71b, the first and second caulking portions 72a, 72b are formed so as to have an appropriate opening angle, for example, an angle of 60 ° to 120 °. The shape is formed. Further, in this fixture 8, a fitting groove 83 to be fitted with a locking piece 44a formed on the fixing plate 44 shown in FIG.
Are formed.

Next, the assembling of the coil 42 and the lead wires 51a and 51b will be described.

First, the winding frame 41 is mounted on the winding machine, the winding start line 42a of the coil 42 is guided to the guide groove 61a of the coil end support 6, and the winding frame
The coil 42 is wound inside 41. Then, the end of the winding end line 42b of the coil 42 is guided to the guide groove 61a of the coil end support 6.

Next, remove the reel 41 from the winding machine,
Is fitted into the recess 43a of the housing 43, and the coil 4 is fixed in the housing 43 with the resin 41a. When the coil 42 is fitted into the recess 43a of the housing 43, the ends of the winding start line 42a and the winding end line 42b of the coil 42 are formed in the holes of the housing 43.
It projects from the outer side 43b, is lined up in the radial direction of the housing 43, and is taken out in a direction perpendicular to the outer surface of the housing 43.

On the other hand, the first mounting metal fitting 71a and the second mounting metal fitting 71b are made up of the first lead wire 51a and the second lead wire at the insulation fixing parts 74a and 74b.
The insulating portions 52a, 52b of the 51b are caulked, and then the metal wire fixing portion 75a,
The metal wires 53a and 53b are crimped at 75b. Thus the first lead wire
First mounting bracket 71a connecting 51a and second lead wire 51b
And the second mounting bracket 71b, the first holding portion 81, the second holding portion 82
It is attached to the fixture 8.

Next, the fitting groove 83 of the fixture 8 having the first mounting bracket 71a and the second mounting bracket 71b fitted therein is fitted into the locking piece 44a of the fixing plate 44, and the first mounting bracket 71a and the second mounting bracket 71b are The protrusions 73a and 73b are inserted into the metal fitting holding grooves 62a and 62b of the coil end support 6.

As described above, the first mounting bracket 71a and the second mounting bracket 71b are mounted on the housing 43, and the coil 42 is provided in the first crimping portion 72a and the second crimping portion 72b of the first mounting bracket 71a and the second mounting bracket 71b. Winding start line 42a and winding end line 42b
Are arranged.

Next, the opposing surfaces of the first caulking portion 72a and the second caulking portion 72b are supported and fixed by a jig from the arrow A, B side shown in FIG. 6, and the first caulking portion 72a and the 2 Apply force to the caulked portion 72b. As a result, the winding start line 42a and the winding end line 42b are sandwiched between the first crimp portion 72a and the second crimp portion 72b. The first caulking portion 72a and the second caulking portion 72b
Workability can be significantly improved by simultaneously performing the caulking work.

Next, by energizing the first crimping portion 72a and the second crimping portion 72b, the enamel wire is melted to start winding the coil 42, the winding end wires 42a, 42b, the first crimping portion 72a, and the second crimping portion 72b. Weld (fading).

Finally, the cover 9 that covers the first mounting bracket 71a, the second mounting bracket 71b, and the fixture 8 is fixed to the housing 43 with an adhesive so that the first mounting bracket 71a and the second mounting bracket 71b.
And the fixture 8 is fixed to the housing 43.

As described above, the winding start line 42a and the winding end line 42b of the coil 42 projecting from the housing 43 can be connected to the first mounting bracket 71a and the second mounting bracket 71b without bending, and thus project from the housing 43. Even if the winding start line 42a and the winding end line 42b are subjected to excessive vibration, there is no fear of disconnection.

Further, since the first crimping portion 72a and the second crimping portion 72b of the first mounting metal fitting 71a and the second mounting metal fitting 71b are supported almost vertically to the outer surface of the housing 43, the first mounting metal fitting 71a
Also, the second mounting bracket 71b can be downsized.

Furthermore, the ends of the winding start line 42a and the winding end line 42b of the coil 42 are supported side by side in the radial direction of the housing 43, so that when compared with the case of supporting side by side in the circumferential direction of the housing 43, Since the lead wire does not project in the radial direction of the housing 43, the electromagnetic clutch 1 can be made compact.

(Modification) In addition, a mounting bracket 71a connected to the winding start wire 42a of the coil 42
The mounting bracket 71b connected to the end-of-winding wire 42b may be independent, instead of being paired.

Further, the ends of the winding start line 42a and the winding end line 42b of the coil 42 may be supported so as to be aligned in the circumferential direction of the housing 43.

Further, the present invention can be applied to the connection of the exciting coil of the electromagnetic clutch that connects and disconnects the supercharger.

[Brief description of drawings]

1 to 8 show an embodiment of the present invention.
FIG. 1 is a side view of a fitting for connecting a coil and a lead wire, FIG. 2 is a sectional view of an electromagnetic clutch, FIG. 3 is a front view of a coil end support, and FIG. 4 is a lead wire connection. FIG. 5 is a top view of the mounting bracket, FIG. 5 is a side view of the mounting bracket to which the lead wire is connected, FIG. 6 is a front view of the mounting bracket for connecting the coil and the lead wire, and FIG. 7 is a front view of the exciting coil. FIG. 8 is a perspective view of the exciting coil, and FIG. 9 is a front view of a conventional fitting for connecting the coil and the lead wire. In the figure, 1 ... Electromagnetic clutch, 2 ... First rotating part, 3 ... Second rotating part, 4 ... Excitation coil part, 6 ... Coil end support, 62a, 62b
...... Groove, 8 ...... Fixture, 9 ...... Cover, 21 ...... Rotor, 31 ......
Friction plate, 42 ... Coil, 42a ... Winding start line, 42b ... Winding end line, 43 ... Housing, 43a ... Recess, 43b ... Hole, 51a
...... First lead wire, 51b ...... Second lead wire, 71a ...... First mounting bracket, 71b ...... Second mounting bracket, 73a, 73b ...... Protrusion.

Claims (3)

[Claims] 1. A ring-shaped housing having a recess for accommodating a coil of an electromagnetic clutch, (b) a coil disposed in the recess of the housing, and (c) an outer surface of the housing. A hole provided in the housing so as to penetrate the recess, and (d) a coil end supporting member that is fixed to the hole portion of the housing and supports an end of the lead wire of the coil, (e) A mounting member which is supported on the outer surface of the housing by the coil end support and is arranged so as to face the tangential direction of the outer peripheral surface of the housing, and which fixes the lead wire; (f) the mounting member, A lead wire connected so as to face the outer peripheral surface of the housing in a tangential direction, and (g) a fixing portion between the mounting bracket and the lead wire, and the mounting bracket and the lead wire on the outer surface of the housing. Coil connection structure of the electromagnetic clutch and a cover made of a fixed insulating material so as to cover the connection portion. 2. The electromagnetic wave according to claim 1, wherein the lead wire of the coil is fixed to the mounting member while being supported by the coil end support in a direction perpendicular to the outer surface of the housing. Clutch coil connection structure. 3. The mounting member has a protrusion projecting toward the coil end support, and the protrusion is inserted into a groove formed in the coil end support to allow the mounting fixture to support the coil end support. A coil connection structure for an electromagnetic clutch according to claim 1 or 2, which is supported by a tool.