JPH07190094A - Connector integrated type stator for electromagnetic clutch - Google Patents

Abstract

PURPOSE:To prevent the deformation of a terminal accompanying the injection of a mold resin by setting the distance of carrying the mold resin from a resin injection hole to a holding part to a position where it is lower than a specified value of the longest distance between the resin injection holes in the circumferential direction of a housing part. CONSTITUTION:Resin injection holes of an injection molding machine are set in two positions of the closest position and farthest position to a connector 2, whereby the 1/2 distance between the resin injection holes in the circumferential direction of a housing part 9a is larger than the distance of carrying a mold resin 12 from the resin injection hole close to the connector 2 to the top end of a coupler 27. Thus, when the flowing speed of the mold resin 12 is assumed constant, the mold resin 12 is charged to the top end of the coupler 27 earlier than the charging of the mold resin 12 in the housing part 9a farthest from each resin injection hole. Namely, since the mold resin 12 charged in the coupler 27 starts to solidify, a terminal 25 is never deformed by pressure retaining.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector-integrated stator for an electromagnetic clutch.

[0002]

2. Description of the Related Art As shown in FIG. 16, a connector-integrated stator of an electromagnetic clutch is installed in a housing portion of a stator housing 103 in a state where a terminal 102a of a connector 102 is connected to a spool 101 around which an exciting coil 100 is wound. When the mold resin 104 is housed, and then the mold resin 104 is injected into the housing portion, the mold resin 104 causes the connector 10
The two couplers 102b are also molded at the same time. It should be noted that the injection ports (not shown) for the mold resin 104 to be injected into the accommodating portion are set at four equal intervals (intervals of 90 degrees) in the circumferential direction of the accommodating portion, and the mold filled in the accommodating portion. As shown in FIG. 17, four injection port marks 105 corresponding to the injection ports are formed on the surface of the resin 104.

[0003]

However, in the above-described connector-integrated stator, since the terminal 102a coupled to the spool 101 receives the pressure of the injected molding resin 104, the rigidity of the terminal 102a is low. As shown in FIG. 16, the terminal 102a is deformed, so that a predetermined dimension cannot be obtained, or a part of the terminal 102a is formed in the coupler 10.
There is a problem such as exposure to the outside of 2b. This is 1/2 of the distance between the injection port marks 105 in the circumferential direction of the container.
On the other hand, the distance from the injection port mark 105 set near the connector 102 to the coupler 102b is larger. That is, the mold resin 104 injected from each injection port trace 105 is filled in the entire housing portion earlier than the coupler 102b, and the coupler 102b becomes the final filling portion. Therefore, in the coupler 102b, a holding pressure (secondary molding pressure) is applied while the mold resin 104 is still in an unsolidified state. Therefore, by applying this holding pressure to the terminal 102a, the terminal 102a is deformed as described above. Cause The present invention has been made based on the above circumstances,
It is an object of the present invention to provide a connector-integrated stator for an electromagnetic clutch, which is capable of preventing deformation of terminals due to injection of molding resin.

[0004]

In order to achieve the above object, the present invention comprises a stator housing having an annular accommodating portion whose one end is opened, and a coil wire wound around a spool. An exciting coil housed in a housing portion, a terminal coupled to the spool and electrically connected to an end portion of the coil wire, and a connector including a holding portion holding the terminal, and resin injection In a connector-integrated stator of an electromagnetic clutch in which the holding portion is integrally formed on the other end side of the stator housing with a molding resin injected from the resin injection port of the means, the holding member corresponds to the resin injection port. The resin injection port of the accommodating portion has a distance that the mold resin flows from the resin injection port to the holding portion in the circumferential direction of the accommodating portion. The longest distance between fat inlet 1/2
The technical means is to set the following positions.

[0005]

According to the present invention having the above-mentioned structure, the connector holding portion is integrally formed on the other end side of the stator housing by the mold resin injected into the housing portion of the stator housing through the resin injection port of the resin injection means. Here, the resin injection port of the accommodating portion corresponding to the resin injection port of the resin injection unit is
The distance that the molding resin flows from the resin injection port to the holding portion of the connector is set to a position that is 1/2 or less of the longest distance between the resin injection ports in the circumferential direction of the accommodating portion. Therefore, when the mold resin is filled in the farthest position from the resin injection port in the circumferential direction of the housing portion, the holding portion is already filled with the mold resin.
That is, the holding portion does not become the final filling portion, and the position farthest from the resin injection port in the accommodation portion becomes the final filling portion.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electromagnetic clutch having a connector-integrated stator of the present invention will be described below with reference to the drawings.
FIG. 1 is a sectional view of an electromagnetic clutch. The electromagnetic clutch 1 of the present embodiment is mounted on a refrigerant compressor (not shown) of a vehicle refrigeration cycle, and a stator 3 integrally formed with a connector 2 and rotational power of an engine (not shown) are transmitted. The rotor 4 is configured to rotate, the armature 5 that faces the rotor 4 in the axial direction, the inner hub 7 that supports the armature 5 via the leaf spring 6, and the like.

The stator 3 comprises an exciting coil 8 which generates a magnetic force when energized and a stator housing 9 which supports the exciting coil 8. The exciting coil 8 is formed by winding a coil wire 11 (see FIG. 5 and FIG. 6) having an insulating coating on a spool 10 formed of a thermoplastic resin (for example, nylon), and after being housed in the stator housing 9. ,
It is fixed by the mold resin 12. The manufacturing method of the stator 3 will be described in detail below.

The stator housing 9 is made of a magnetic material such as iron, and forms the magnetic path of the exciting coil 8 together with the rotor 4 and the armature 5 which are also made of magnetic material. The stator housing 9 has an annular housing portion 9a (see FIGS. 7 and 8) whose one end side (the left end side in FIG. 1) is open, and the exciting coil 8 is housed in the housing portion 9a. The stator housing 9 is fixed to the other end surface (right end surface of FIG. 1) of the annular arm support 13 by welding, and the arm support 13 is fixed to the housing 15 of the refrigerant compressor by the circlip 14. Axial positioning is performed.

The rotor 4 has an annular U-shaped cross-section (inverted U-shaped in FIG. 1) for housing the stator 3, and a housing of the refrigerant compressor via a bearing 16 arranged on the inner periphery thereof. It is rotatably supported by 15. This rotor 4
Has a pulley 17 fixed to its outer peripheral portion by welding or the like, and is rotated by the rotational power of the engine transmitted via a multi-stage V-belt (not shown) that is wound around the pulley 17. Further, the rotor 4 has an armature 5
The one end face side in the axial direction opposite to is a friction face.

The armature 5 is composed of an inner ring 5a having an annular shape and an outer ring 5b having an annular shape arranged on the outer periphery of the inner ring 5a with a constant gap, and each ring 5a, 5b is made of a non-magnetic material. Each leaf spring 6 with rivets 18
Is fixed by. The armature 5 is arranged so as to face the friction surface of the rotor 4 in the axial direction, and the other end surface of each ring 5a, 5b (the surface facing the friction surface of the rotor 4).
Are considered to be friction surfaces.

The inner hub 7 has a plate portion 7a having a substantially triangular plan shape, and a cylindrical portion 7b provided in the central portion of the plate portion 7a. The cylindrical portion 7b is a rotating shaft of a refrigerant compressor. It is fitted with the end of 19 and the bolt 20
It is fixed by. The leaf spring 6 is the rivet 2
It is fixed to the plate portion 7 a of the inner hub 7 by 1. Therefore, the armature 5, the leaf spring 6, and the inner hub 7 rotate together with the rotary shaft 19 of the refrigerant compressor.

The leaf spring 6 urges the armature 5 in a direction away from the rotor 4 (leftward in FIG. 1) so as to eliminate frictional engagement between the armature 5 and the rotor 4 when the energization of the exciting coil 8 is stopped. . The plate portion 7a of the inner hub 7 is provided with a rubber stopper 22 for positioning the armature 5 biased by the leaf spring 6 when the energization of the exciting coil 8 is stopped.

At the inner circumference of the armature 5 (the inner circumference of the inner ring 5a), a rubber suction noise reducing member 23 is arranged in order to reduce the suction noise generated when the armature 5 is attracted to the rotor 4. ing. This suction noise reducing member 23
Is supported by a metal support member 24, and one end face side thereof is pressed by the leaf spring 6. The support member 24 is fixed to the plate portion 7a of the inner hub 7 by the rivets 21 together with the leaf spring 6.

Here, a method of manufacturing the stator 3 will be described with reference to FIG.
~ It demonstrates based on FIG. First, a metal (for example, copper alloy) terminal 25 is press-fitted into a terminal insertion hole (not shown) formed in the spool 10 (see FIG. 2). The terminal insertion hole has a rectangular cross section, and
Are provided at two predetermined positions in the circumferential direction.

As shown in FIGS. 3 and 4, the terminal 25 has a claw portion 25a for crimping and fixing the end portions 11a and 11b (see FIG. 6) of the coil wire 11 and is inserted into the terminal insertion hole. Saw-toothed projections 25c are provided on both sides of the rear end portion 25b (the left end portion in FIGS. 3 and 4) to prevent the terminal portion from coming off. Also, the claw portion 2
Two constricted portions 25d for bending the terminal 25 into a predetermined shape are provided on the tip side of 5a.

After inserting the terminal 25 into the terminal insertion hole, the coil wire 11 is wound around the spool 10 and the coil wire 11 is wound.
After both ends 11a and 11b of the winding start and the winding end are crimped and fixed by the claw portions 25a of the terminal 25, as shown in FIG. As a result, the insulating coating of the coil wire 11 is broken by heat generated when electricity is applied, and the coil wire 11 and the terminal 25 are electrically connected (see FIG. 6).

After the coil wire 11 and the terminal 25 are electrically connected, the exciting coil 8 together with the spool 10 is accommodated in the accommodating portion 9a of the stator housing 9 (see FIG. 7), and then the terminal 25 is constricted. It is bent into a predetermined shape at 25d (see FIG. 8). Finally, an injection molding machine (resin injecting means of the present invention) (not shown) injects the molding resin 12 into the housing portion 9a of the stator housing 9 to fix the exciting coil 8, and protects the terminal 25 with the molding resin 12. The tubular coupler 27 is simultaneously molded to integrally mold the connector 2 (see FIGS. 9 and 10).

Here, the molding resin 1 produced by the injection molding machine 1
The injection of 2 is performed at a position closest to the connector 2 and a position farthest from the connector 2 in the circumferential direction of the accommodating portion 9a.
It is performed from a resin injection port (not shown) set at a place. Therefore, the mold resin 1 filled in the housing portion 9a
As shown in FIG. 11, two injection hole traces 28 (resin injection holes of the present invention) corresponding to the resin injection holes of the injection molding machine are formed on the surface of No. 2. This injection mark 28
The cross-sectional shape of is shown in FIG.

As described above, the resin injection port of the injection molding machine is set at two positions, that is, the position closest to the connector 2 and the position farthest from the connector 2, so that the tip of the coupler 27 extends from the resin injection port near the connector 2. From the distance that the mold resin 12 flows up to 1 / the distance between the resin injection ports in the circumferential direction of the housing portion 9a.
The distance of 2 is larger. Therefore, the mold resin 12
Assuming that the flow velocity is constant, the mold resin 12 is filled up to the tip of the coupler 27 faster than the mold resin 12 is filled in the housing portion 9a farthest from each resin injection port. That is, since the coupler 27 portion does not become the final filling portion of the mold resin 12, the mold resin 12 filled in the coupler 27 has already begun to solidify when the injection process moves to the pressure holding process. The terminal 25 will not be deformed by the above.

Next, a second embodiment of the present invention will be described. FIG. 13 is a front view of the stator 3 viewed from the opening side of the housing portion 9a. In this embodiment, the resin injection port of the injection molding machine is
Only one position is set at the position closest to the connector 2. As a result, on the surface of the mold resin 12 of the housing portion 9a, as shown in FIG. 13, only one injection port mark 28 is formed at the position closest to the connector 2. In the case of the present embodiment, the distance from the resin injection port to the furthest accommodation portion 9a is further longer than that in the first embodiment, and therefore the coupler 27 portion is naturally not the final filling portion of the mold resin 12. Therefore, the deformation of the terminal 25 can be prevented as in the first embodiment. In this case, in order to prevent the spool 10 from being exposed on the surface due to the resin pressure, it is necessary to increase the number of spool retainers (not shown). The spool retainer may be provided with a convex portion on the mold of the injection molding machine, or the spool 10 may be provided with a convex portion.

Next, a third embodiment of the present invention will be described. FIG. 14 is a front view of the stator 3 as seen from the opening side of the housing portion 9a. In this embodiment, the resin injection port of the injection molding machine is
Two locations are provided near the connector 2 and one location is located farthest from the connector 2, for a total of three locations. As a result, the surface of the mold resin 12 of the accommodation portion 9a is not exposed to the state of FIG.
As shown in FIG. 3, three injection port marks 28 are formed at positions corresponding to the resin injection ports. Also in the case of this embodiment, the coupler 27
The portion does not become the final filled portion of the mold resin 12, and therefore, the deformation of the terminal 25 in the pressure holding step can be prevented.

Next, a fourth embodiment of the present invention will be described. FIG. 15 is a front view of the stator 3 viewed from the opening side of the housing portion 9a. In this embodiment, the resin injection port of the injection molding machine is
In this configuration, three positions are set at equal intervals in the circumferential direction of the housing portion 9a, and one of the resin injection ports is set to the position closest to the connector 2. As a result, three injection port marks 28 are formed on the surface of the mold resin 12 of the housing portion 9a as shown in FIG. In the case of the present embodiment, the distance between the resin injection ports is shorter than that in the first to third embodiments, but the half distance between the resin injection ports is still the connector 2
From the resin injection port set to the position closest to
Since the distance is larger than the distance that the mold resin 12 flows, the coupler 27 portion does not become the final filling portion of the mold resin 12, and therefore, the deformation of the terminal 25 in the pressure holding step can be prevented.

[0023]

According to the present invention, the distance that the molding resin flows from the resin injection port of the housing portion to the holding portion of the connector is the longest distance between the resin injection ports in the circumferential direction of the housing portion.
The holding portion does not serve as the final filling portion because the resin injection port is set at a position of / 2 or less. Therefore, in the pressure holding step, the mold resin already filled in the holding portion is solidified, so that it is possible to prevent the terminals from being deformed by the resin pressure. As a result, a predetermined terminal size can be secured without exposing a part of the terminal to the outside of the holding portion.

[Brief description of drawings]

FIG. 1 is a sectional view of an electromagnetic clutch.

FIG. 2 is a cross-sectional view showing a state where terminals are assembled to a stator housing.

FIG. 3 is a plan view of a terminal.

FIG. 4 is a side view of a terminal.

FIG. 5 is an explanatory diagram showing a process of electrically connecting a coil wire and a terminal.

FIG. 6 is a plan view showing an electrically connected state of a coil wire and a terminal.

FIG. 7 is a diagram showing a state where an exciting coil is housed in a stator housing.

FIG. 8 is a diagram showing a state in which a terminal is bent into a predetermined shape.

FIG. 9 is a cross-sectional view of the stator filled with a mold resin.

FIG. 10 is a plan view of the stator viewed from the connector side.

FIG. 11 is a plan view of the stator as seen from the opening side of the accommodating portion.

FIG. 12 is a sectional view of an injection port trace of a mold resin.

FIG. 13 is a plan view of the stator as seen from the opening side of the accommodating portion (second embodiment).

FIG. 14 is a plan view of the stator as seen from the opening side of the accommodating portion (third embodiment).

FIG. 15 is a plan view of the stator as seen from the opening side of the accommodating portion (fourth embodiment).

FIG. 16 is a sectional view of a connector portion of a connector-integrated stator according to a conventional technique.

FIG. 17 is a plan view of a stator according to the related art.

[Explanation of symbols]

 1 Electromagnetic Clutch 2 Connector 3 Connector Integrated Stator 8 Exciting Coil 9 Stator Housing 9a Housing 10 Spool 11 Coil Wire 11a End 11b End 12 Mold Resin 25 Terminal 27 Coupler (Holder) 28 Coupler (Holder)

Front page continued (72) Inventor Toshiko Takeda 1-8-1, Shimo-Meguro, Meguro-ku, Tokyo Du Pont Co., Ltd. (72) Inventor Takashi Akagi 1-4-1-1, Shimo-Meguro, Meguro-ku, Tokyo Du Inside Pong Co., Ltd.

Claims (1)

[Claims] 1. A stator housing having an annular housing portion whose one end is opened, a coil wire wound around a spool, and an exciting coil housed in the housing portion together with the spool, and coupled to the spool. A terminal electrically connected to the end of the coil wire, and a connector composed of a holding portion for holding the terminal, the mold resin being injected from the resin injection port of the resin injection means into the housing. In the connector integrated stator of the electromagnetic clutch in which the holding portion is integrally formed on the other end side of the stator housing, the resin injection port of the housing portion corresponding to the resin injection port is the resin injection port from the resin injection port. At a position where the distance that the mold resin flows to the holding portion is 1/2 or less of the longest distance between the resin injection ports in the circumferential direction of the accommodating portion. The stator integrated with the connector of the electromagnetic clutch, which has been set.