JPH0237257Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention connects a wire harness connected to a lead wire drawn out from the armature coil of a rotating electrical machine such as a magnet generator or an electric motor to the case of the rotating electrical machine or This invention relates to a device that is fixed to a fixed part such as a cover.

[Prior Art] Generally, in a rotating electric machine, cords are connected to a plurality of lead wires drawn out from an armature coil, respectively, and the cords are led out as a wire harness. Figure 9 shows, as an example, the lead-out structure of the wire harness connected to the armature that constitutes the stator of a magnet generator.
is a ring-shaped yoke part 2 to a large number of coil winding parts 3,
This armature is formed by winding an armature coil 5 around each coil winding part 3 of a star-shaped annular iron core 4 having a structure in which 3,... are extracted radially.
It is fixed to the stator mounting part of the magnet generator by a bolt inserted into a bolt insertion hole 2a provided in the magnet generator. A pole piece part 3a is provided at the tip of each coil winding part 3, and each pole piece part is arranged to face the magnetic pole of a magnet rotor (not shown) with a predetermined gap interposed therebetween.
Lead wires (consisting of coil conductors) 6, 6, ... are drawn out from the terminal parts of the armature coils 5, 5, ...,
A core wire of a cord 7 is connected to each lead wire 6 by soldering or the like. Each leader wire 6 is made of a magnet wire constituting the coil 5 and generally has a small diameter, so if tension is applied to the leader wire 6 through the cord 7, there is a risk that the leader wire will break.
Therefore, in the conventional armature, each code 7
The connecting portions between the lead wires 6 and the lead wires 6 are covered with an insulating tube 8, and the joint portions between the multiple lead wires 6, 6, ... and the cords 7, 7, ... are covered with the insulating tube 8, and as shown in FIG. Clamp fitting 9 fixed to yoke part 2
are clamped all at once. A plurality of cords 7, 7, ... connected to a plurality of lead wires are inserted all at once into the insulating tube 10 to constitute a wire harness 11, and this wire harness is attached to a fixed part such as the cover 12 of the generator. It is led out to the outside through an attached grommet 13.

[Problems to be solved by the invention] As mentioned above, in the conventional wire harness fixing device, in order to fix the connection part between the cord making up the wire harness and the lead wire from the armature coil, Since it was necessary to attach the clamp fitting 9 to the iron core, there was a problem in that the number of assembly steps increased and the cost increased.

An object of the present invention is to provide a wire harness fixing device for a rotating electric machine that can fix the connecting portion between a wire harness and a lead wire from an armature coil without attaching a clamp fitting to the armature core. There is a particular thing.

[Means for Solving the Problems] The present invention provides a wire harness equipped with grommets for fixing a wire harness consisting of a plurality of cords each connected to a plurality of lead wires drawn out from an armature coil of a rotating electric machine. This fixing device is designed to fix the connecting portion between the wire harness and the lead wire from the armature coil without using a clamp fitting.

Therefore, in the present invention, there is provided a cord through hole through which the cord constituting the wire harness is passed through the grommet to support it, and an end face which is open at one end of the cord through hole, and a lead wire from the armature coil. Both the insertion hole and the insertion hole into which the connection part with the cord is inserted one by one are provided.

[Function of the invention] When the grommet as described above is used, the connection between the wire harness cord and the lead wire from the armature coil can be fixed without attaching a clamp fitting to the armature core. Therefore, the number of parts can be reduced and assembly man-hours can be reduced.
It is possible to reduce the cost of the rotating electric machine.

[Embodiments] Examples of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the present invention. In the figure, the same parts as those of the conventional example shown in FIG. 9 are given the same reference numerals. This is exactly the same as the example shown in FIG.

In the present invention, the wire harness 20 is made up of a plurality of cords 21, 21, ... inserted into an insulating tube 22, and the cords 21, 2
The core wires 1, . . . are connected to lead wires 6, 6, . . . drawn out from the armature coil 5, respectively. In this embodiment, each cord 21 is connected to the lead wire 6 by a crimp terminal fitting 23 as shown in FIG. 5, but this connection may be made by other means such as soldering. It is also possible to connect two or more lead wires to one cord 21.

As shown in FIG. 2, the cover 12 of the rotating electrical machine consists of two halves 12A and 12B, and the cover 12 is assembled with both halves being tightened in a direction toward each other by a tightening means (not shown). There is. U-shaped notches 12a and 12b are provided in the half portions 12A and 12B of the cover 12, respectively, and a rectangular grommet mounting hole 25 is formed by these notches. A grommet 26 is attached to this grommet attachment hole 25, and the vicinity of one end of the wire harness 20 is fixed by this grommet, and the wire harness 20
The connection between the cord 21 and the lead wire 6 from the armature coil is fixed.

The grommet 26 is made of an integrally molded product made of an elastic insulating material such as rubber, and as shown in FIGS. 3A and 3B, the grommet 26 has a substantially rectangular base 27 and a sleeve-shaped part protruding from the base 27 toward the surface thereof. The base 2 includes a wire harness holding part 28 and a protruding part 29.
A groove 30 into which the inner peripheral edge of a grommet mounting hole 25 provided in the cover (fixed part) 12 is fitted is provided around the side surface of the cover (fixing part) 7 . A required number of cord insertion holes 31 (three in this example) are provided to penetrate the base 27 and communicate with the inside of the wire harness holding part 28 , and a cord insertion hole 31 is provided that penetrates the base from the back side of the base 27 and communicates with the inside of the wire harness holding part 28 . A required number of bottomed insertion holes 32 (three in this example) are provided. The cord insertion hole 31 is provided so that the cord 21 can be passed through it tightly, and the insertion hole 32 is provided so that the connecting portion between the cord 21 and the lead wire 6 can be inserted tightly.

The grommet 26 has a mounting hole 2 in its groove 30.
5 is attached to the attachment hole 25 in a state where the inner peripheral edges of the cord 21 and the lead wire 6 are connected to each insertion hole 3.
2 are inserted one by one. Also each code 2
1 is led out to the outside through one of the cord insertion holes 31, and the end of the insulating tube 22 is tightly fitted into the wire harness holding part 28. Then, the grommet 26 is tightened so that the halves 12A and 12B of the cover 12 are tightened toward each other and the diameters of the cord insertion hole 31 and the insertion hole 32 are reduced.
is tightened, thereby connecting the cord 21 and the leader line 6.
The connecting portion and the cord 21 are prevented from coming off.

In the above embodiment, the cord through hole 31 and the wire harness holding portion 28 constitute a cord through hole.

As mentioned above, according to the present invention, the grommet 2
6 fixes the cord 21 of the wire harness 20 and also fixes the connecting portion between the cord 21 and the leader wire 6, so there is no need to attach a clamp fitting to the armature core 2. Therefore, the number of man-hours in the process of fixing the wire harness can be reduced, and costs can be reduced.

In the above embodiment, the cord insertion hole 31 provided in the grommet 26 was provided for each cord, but as shown in FIG. 4A and B, a single cord insertion hole 31 is provided in the grommet 26.
It is also possible to have a structure in which a plurality of cords 21 are inserted at once in 1'.

FIG. 6 shows another embodiment of the present invention.
In this embodiment, a grommet 26 is arranged to close a mounting hole 25 provided in a cover 12 of the rotating electrical machine and is fixed to the cover 12 with a screw 35. In this embodiment, a substantially horseshoe-shaped tightening fitting 36 is provided which integrally has an arc-shaped tightening portion 36a and arm portions 36b, 36b provided with screw insertion holes h as shown in FIG. 3
The tightening part 36a of 6 is the protruding part 2 of the grommet 26.
9, the arm portions 36b, 36
b is fixed to the cover 12 with screws 29. With this tightening fitting, the protrusion 2 of the grommet
9 is tightened to reduce its diameter, thereby reducing the diameter of the insertion hole 32 and preventing the connecting portion between the cord 21 and the lead wire 6 from coming off. This embodiment is similar to the embodiment shown in FIG. 1 in that the wire harness cords 21, 21, . . . are tightly inserted and fixed into the cord insertion holes of the grommets.

FIG. 8 shows an embodiment in which the present invention is applied to an electric motor. In this embodiment, the case 40 of the electric motor is
is divided into half parts 40A and 40B, and a ring-shaped star-shaped armature core 41 is fixed to one half part 40A with screws 39. A rotating shaft 44 is supported by bearings 42 and 43 supported at the center of the bottom of the half parts 40A and 40B of the cover 40, respectively, and a permanent magnet 46 is fixed to the inner circumference of a cup-shaped rotating body 45 on this rotating shaft. A magnet rotor 47 configured as shown in FIG. As in the example shown in FIG. 2, the grommet 26 is fitted into a mounting hole provided at the joint between the case halves 40A and 40B, and is pulled out from the armature coil 48 wound around the armature core 41. A connecting portion between the drawn out wire 6 and the cord 21 constituting the wire harness 20 is inserted into an insertion hole provided in the protruding portion 29 of the grommet 26.
In addition, a cord 21 constituting the wire harness 20,
21, ... is a grommet wire harness holding part 2
It is inserted into a cord insertion hole provided so as to communicate with the inner hole of 8 and is fixed. case 40
The halves 40A and 40B are tightened and connected together by the screw 49 in the direction in which they are drawn toward each other, thereby tightening the grommet 26 and tightening the cord 2.
1 and the lead wire 6 from coming off, and the wire harness 20 from coming off. The cords 21, 21, . . . of the wire harness 20 are connected to a connector 50, and the wire harness 20 is connected to a drive circuit of an electric motor via this connector.

In each of the above embodiments, at least a portion of the grommet 26 is tightened to prevent the connection between the cord 21 and the lead wire 6 from coming off, and to prevent the cord and insulating tube of the wire harness 20 from coming off. These can also be fixed to the grommet with adhesive to prevent them from coming off.

The number of connections between the cords fixed to the grommet and the lead wires and the number of cords constituting the wire harness are arbitrary.

[Effects of the invention] As described above, according to the invention, there is a cord through-hole through which a cord constituting a wire harness is passed and supported, and an insertion hole through which a connecting portion between the lead wire from the armature coil and the cord is inserted. Since both the hole and the hole are provided in the grommet, the connection between the wire harness cord and the lead wire from the armature coil can be fixed without attaching a clamp fitting to the armature core. Therefore, the number of parts can be reduced, the number of assembly steps can be reduced, and the number of coils in the rotating electric machine can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a partially cross-sectional configuration diagram showing the configuration of the main part of the embodiment of the present invention, and Fig. 2 is a schematic diagram showing the shape of the grommet mounting hole provided in the cover in the embodiment of Fig. 1. FIGS. 3A and 3B are front and bottom views of the grommet used in the present invention, respectively, and FIGS. 4A and B are front and bottom views showing other examples of the grommet used in the present invention, respectively. 5
The figure is a front view showing an example of the connection between the cord constituting the wire harness and the lead wire from the armature coil, FIG. 6 is a sectional view showing the main part of another embodiment of the present invention, The figure is a perspective view showing an example of a fastening fitting used in the embodiment of Fig. 6, Fig. 8 is a half sectional view showing an embodiment in which the present invention is applied to an electric motor, and Fig. 9 is a main part of the conventional example. FIG. 10 is an explanatory diagram showing the clamp structure of the connecting portion between the lead wire and the cord in the example of FIG. 9. 1... Armature, 2... Yoke part, 3... Coil winding part, 4... Armature core, 5... Armature coil,
6... Lead wire, 20... Wire harness, 21
... Code, 26 ... Grommet, 31, 31'
...Cord insertion hole, 32...Insertion hole.

Claims (1)

[Claims for Utility Model Registration] Wire harness 20 consisting of a plurality of cords 21, 21... connected to a plurality of lead wires 6, 6... drawn out from an armature coil 5 of a rotating electrical machine, respectively.
In a wire harness fixing device including a grommet 26 for fixing an end of the wire harness 26, the grommet 26
Cord through holes 31, 31', 28 through which the cords 21, 21... constituting the cords 21, 21... are passed through and supported; , 6 . . . and an insertion hole 32 into which the connecting portions of the cords 21, 21 . . . are inserted one by one.