JPH079053U - Rotating electric machine - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the gap between the rotor and the stator base plate to reduce the axial dimension of the rotating electrical machine. A wire harness lead-out projection 14 having a notch 14a is provided on an outer peripheral portion of a stator base plate 2, and a wire harness 4 led out from a winding of a stator is notched 14a.
It is led out to the outside while being inserted inside. Wire harness 4
The lead-out portion is bound to the protrusion 14 by the binding band 15 and fixed to the stator base plate 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotating electric machine provided with a wire harness that is connected to a winding of a stator attached to a stator base plate and is led out from an outer peripheral portion of the stator base plate.

[0002]

[Prior art]

 For example, in a rotary electric machine such as a flywheel magnet generator that is attached to an internal combustion engine and is used as a power source for ignition, lighting, and charging of the engine, a stator fixed to a stator base plate attached to the engine , A magnet rotor that is attached to the rotating shaft of the engine and that rotates outside the stator.

In this type of rotating electric machine, generally, a multi-pole stator core is used, and a plurality of armature coils wound around salient pole portions of the stator core are assigned to a predetermined number of loads, and Since the lead wires are individually drawn from the armature coil, the number of lead wires that are drawn out often increases.

When many lead wires are drawn out from the rotating electric machine as described above, a wire harness is constructed by bundling a large number of lead wires and inserting them all together into an insulating tube, and the wire harness is fixed to the stator base plate. It is designed to be led out from the outer peripheral portion of the. In this case, the lead-out portion of the wire harness from the stator base plate is fixed to the stator base plate in a state of being oriented substantially along the plate surface of the stator base plate.

FIGS. 7 and 8 show an example of a conventional rotary electric machine of this type. In these figures, 3 is a fixed base plate fixed to a stator base plate 2 attached to a crankcase of an internal combustion engine. A stator 5 is a magnet rotor of a flywheel type which is attached to a rotary shaft 6 of the engine and rotates outside the stator 3, and 4 is fixed by being connected to a winding of an armature coil provided in the stator 3. It is a wire harness led out from the outer peripheral portion of the slave base plate 2. As shown in FIG. 8, the wire harness 4 is formed by inserting a plurality of lead wires 4a into an insulating tube 4b all together, and in a conventional rotating electric machine, the wire harness 4 is formed on the upper surface side of the stator base plate 2 ( It is arranged along the plate surface (on which the stator is attached) and held by a clamp member 16 at a position near the outer peripheral portion of the stator base plate 2, and the clamp member 16 is fixed by a screw 17 to the stator base. It was screwed to the plate 2.

[0006]

[Problems to be solved by the device]

 The conventional rotating electric machine has the following problems.

(A) Since the wire harness 4 is fixed by the clamp member 16 and is led out to the outside in a state where the wire harness 4 is arranged along the plate surface of the stator base plate 2, the upper surface of the stator base plate 2 and the rotor 5 It was necessary to set the gap g between the end surface of the wire harness 4 and the opening side end surface in the axial direction larger than the outer diameter of the wire harness 4 and the height of the clamp member 16. Therefore, it is inevitable that the total length of the rotating electric machine in the axial direction becomes large, the rotating electric machine becomes large-sized, and the space required for mounting the rotating electric machine becomes large.

(B) Since the clamp member 16 for fixing the wire harness 4 is fixed to the stator base plate 2 with the screw 17, it is necessary to provide a screw hole for screwing the screw 17 into the stator base plate 2. As a result, the man-hours for processing the stator base plate increase, and the manufacturing cost increases.

The object of the present invention is to reduce the gap between the stator base plate and the axial end surface of the rotor to reduce the axial length of the rotating electric machine, and to use the wire harness without using screws. An object of the present invention is to provide a rotary electric machine that can be fixed to a stator base plate to reduce the space required for mounting the rotary electric machine and reduce the number of processing steps.

[0010]

[Means for Solving the Problems]

 The present invention includes a stator base plate, a stator attached to the stator base plate, and a wire harness connected to a winding of the stator and led out from an outer peripheral portion of the stator base plate. In addition, it relates to a rotating electric machine in which the lead-out portion of the wire harness from the stator base plate is fixed to the stator base plate in a direction substantially along the plate surface of the stator base plate. .

In the present invention, a wire harness lead-out projection having a groove or a notch into which the wire harness can be inserted is formed on the outer periphery of the stator base plate, and the groove or cut of the projection is formed. The lead-out portion of the wire harness is inserted into the cutout portion, and the lead-out portion of the wire harness inserted into the groove or the cutout portion is bound to the protruding portion by the binding means.

As the binding means, a binding band used for gathering general electric wiring may be used, or a wire binding thread or the like may be used.

[0013]

[Action]

 As described above, when the lead-out part of the wire harness is led out to the outside while being inserted into the groove or notch formed in the wire harness lead-out protrusion, the protruding length of the lead-out part of the wire harness from the stator base plate Is approximately equal to the sum of the outer diameter of the wire harness and the thickness of the binding means, minus the depth of the groove or notch in the wire harness lead-out projection. Therefore, it is possible to reduce the gap between the stator base plate and the axial end face of the rotor as compared with the conventional rotating electric machine in which the lead-out portion of the wire harness is aligned with the plate surface of the stator base plate. The overall length of the rotating electric machine in the axial direction can be shortened to reduce the size of the rotating electric machine.

Further, with the above structure, the wire harness can be fixed to the stator base plate only by binding the lead-out portion to the wire harness lead-out protrusion, so that the wire harness for fixing the wire harness is fixed to the stator base plate. There is no need to provide screw holes. Therefore, the number of working steps of the stator base plate can be reduced, and the manufacturing cost can be reduced.

[0015]

【Example】

 1 to 4 show an embodiment in which the present invention is applied to a flywheel magnet generator mounted on an internal combustion engine and used as an ignition power source, a lighting power source, and a charging power source of the engine.

In FIG. 1, reference numeral 1 denotes a stator assembly attached to a crankcase of an internal combustion engine (not shown). The stator assembly 1 includes a stator 3 attached to a stator base plate 2 and a stator 3 of the stator. A wire harness 4 connected to the winding of the armature coil and led out to the outside. Reference numeral 5 denotes a flywheel-type magnet rotor that is attached to a rotary shaft 6 of the engine and rotates outside the stator 3. The magnet rotor 5 includes a flywheel 7 having a substantially cup shape, and a flywheel 7 of the flywheel 7. A permanent magnet 8 disposed on the inner circumference of the peripheral wall portion and having magnetic poles facing the magnetic pole portion of the stator 3, and a boss portion provided at the center of the bottom wall portion of the flywheel 7 and fitted to the rotary shaft 6 of the engine. It consists of 9. The stator assembly 1 and the magnet rotor 5 constitute a flywheel magnet generator.

As shown in FIG. 2, the stator 3 has a stator core (laminated iron core) having a yoke portion 11a and four salient poles 11b, 11b, ... Radially protruding from the yoke portion. 11 and armature coils 13a to 13d wound around the salient pole portions 11b, 11b, ... Of the stator core via the bobbin 12. The yoke portion 11a of this stator is fixed by screws 10 to a stator mounting portion 2a projecting from the central portion of a stator base plate 2 formed in a substantially disc shape. Among the armature coils 13a to 13d, for example, the armature coil 13a is used as an exciter coil for an ignition power source with one end grounded, and the armature coils 13b to 13d are connected in series to charge a battery. Used as.

In this example, one end of an armature coil 13a forming an exciter coil is grounded to the iron core, and one end of one lead wire 4a is connected to the other end of the armature coil 13a. Further, one ends of lead wires 4a, 4a are connected to both ends of the series circuit of the armature coils 13b to 13d, respectively, and a total of three lead wires 4a are collectively inserted into the insulating tube 4b to form the wire harness 4. ing. The wire harness 4 is led out from the outer peripheral portion of the stator base plate.

As shown in FIG. 3, a wire harness lead-out notch for opening the outer periphery of the stator base plate 2 to the outer periphery of the stator base plate 2 at a position where the wire harness is led out, as shown in FIG. A portion 14a and notch portions 14b and 14b respectively formed on both sides of the notch portion 14a are formed, and a protrusion 14c is formed between the notch portion 14a and the notch portions 14b and 14b on both sides thereof. 14c is formed. The width W of the wire harness lead-out notch 14a is selected to be approximately the same as the outer diameter of the wire harness 4, and recesses 14d and 14d for inserting a binding band are formed on the outer surfaces of the protrusions 14c and 14c, respectively. Has been done. In this example, the wire harness lead-out notch 14a and the protrusions 14c and 14c form the wire harness lead-out protrusion 14.

The lead-out portion of the wire harness 4 from the stator base plate 2 is inserted into the notch portion 14a of the wire harness lead-out projection 14 as shown in FIG. 4, and is inserted into the notch portion 14a. The lead-out portion of the wire harness is bound to the wire harness lead-out projection 14 by the binding band 15 made of resin inserted in the binding bunt insertion recesses 14d, 14d. As the binding band 15, it is well known that a locking portion 15b having a hole for inserting and locking the band 15a is integrally provided at one end of a band 15a having a number of teeth formed along the length direction. Can be used. This type of binding band is generally used for gathering electrical wiring, and when the band 15a deformed into a loop shape is inserted into the hole of the locking portion 15b, the teeth provided on the band 15a. The portion of the band 15a is engaged with the tooth portion formed on the inner surface of the hole of the engaging portion 15b so that the band 15a is engaged with the engaging portion 15b.

As described above, when the lead-out portion of the wire harness is bound to the protrusion 14 by using the binding band 15, the lead-out portion of the wire harness is fixed to the stator base plate 2 without using screws. Therefore, it is not necessary to provide a screw hole for fixing the wire harness on the stator base plate.

As described above, when the lead-out portion of the wire harness is inserted into the cutout portion 14a, the axial end surface 7a (see FIG. 1) on the opening side of the flywheel 7 and the fixed base plate 2 are provided. Since the gap g between and can be set smaller than the value obtained by adding the thickness of the binding band 15 to the outer diameter of the wire harness 4, the axial dimension of the rotating electric machine can be reduced.

In the above embodiment, as shown in FIGS. 2 to 4, the tip end surface of the wire harness lead-out protruding portion 14 is located on substantially the same surface as the outer peripheral surface of the stator base plate 2. As shown in FIG. 5, the wire harness lead-out projection 14 is formed so that its tip projects further outward than the outer peripheral surface of the stator base plate 2. You may.

In the above-described embodiment, the wire harness lead-out protrusion 14 is constituted by the pair of protrusions 14c and 14c and the notch 14a formed between the protrusions 14c and 14c, and the wire harness is provided in the notch 14a. Although the lead-out portion of the harness is inserted, as shown in FIG. 6, the wire is formed by the protrusion 14c formed between the notches 14b and 14b and the bottomed groove 14e provided in the protrusion 14c. The harness lead-out projection 14 may be configured. Also in this case, the lead-out portion of the wire harness inserted into the groove 14e is fixed to the stator base plate 2 by binding the lead-out portion of the wire harness to the wire harness lead-out protrusion 14 by the binding band 15. can do.

In the above embodiment, the flywheel magnet generator is taken as an example of the rotating electric machine. However, the outer rotor type of the outer rotor type is configured so that the rotor rotates outside the stator attached to the stator base plate. The present invention can be widely applied to pulling out the wire harness from the armature coil of the rotating electric machine.

In the above embodiment, the binding band is used as the binding means, but a cotton thread, a resin thread, or the like used for binding the wiring may be used as the binding means.

[0027]

[Effect of device]

 As described above, according to the present invention, the wire harness guiding protrusion formed on the outer peripheral portion of the stator base plate is provided with the groove or notch into which the wire harness can be inserted, and the inside of the groove or notch is provided. Since the lead-out part of the wire harness inserted into the wire harness is fixed by binding it to the wire harness lead-out protrusion, the gap between the stator base plate and the end face in the axial direction of the rotor is made smaller than before. By setting it small, the size of the rotating electric machine in the axial direction can be reduced. Further, in the present invention, by fixing the lead-out portion of the wire harness to the stator base plate by using a binding means, it is not necessary to provide a screw hole for fixing the wire harness in the stator base plate. There is an advantage that the manufacturing cost can be reduced by reducing the man-hours for processing the slave base plate.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a schematic structure of an embodiment of a rotating electric machine of the present invention.

FIG. 2 is a front view of a stator assembly used in an embodiment of the present invention.

FIG. 3 is a front view showing a wire harness lead-out protrusion of a stator base plate used in an embodiment of the present invention.

FIG. 4 is a perspective view showing a lead-out portion of the wire harness according to the embodiment of the present invention.

FIG. 5 is a perspective view showing another embodiment of the wire harness lead-out protrusion in the present invention.

FIG. 6 is a perspective view showing still another embodiment of the wire harness lead-out protrusion of the present invention.

FIG. 7 is a vertical sectional view showing a schematic structure of a conventional rotary electric machine.

FIG. 8 is a perspective view showing a lead-out portion of a wire harness in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator assembly 2 Stator base plate 3 Stator 4 Wire harness 5 Magnet rotor 14 Wire harness lead-out projection 14a Notch 14e Groove 15 Binding band

Claims (1)

[Scope of utility model registration request] 1. A stator base plate, a stator attached to the stator base plate, and a wire harness connected to a winding of the stator and led out from an outer peripheral portion of the stator base plate. And a rotation portion fixed to the stator base plate in a state in which a lead-out portion of the wire harness from the stator base plate is oriented substantially along a plate surface of the stator base plate. In the electric machine, a wire harness leading-out projection having a groove or a notch into which the wire harness can be inserted is formed on an outer peripheral portion of the stator base plate, and the wire harness leading-out projection is formed in the groove or the notch of the projection. A rotating electrical machine, wherein the lead-out portion of the wire harness is inserted, and the lead-out portion of the wire harness inserted into the groove or notch is bound to the protrusion by a binding means.