JP2002233094A - Rotating electric appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the miniaturization of a rotating electric appliance 1 by simplifying the connection method of the lead wire 2c and the leader line 7 of a stator winding 2a and reducing their connection man-hours and the number of parts. SOLUTION: The lead wire 2c and the leader line 7 of the stator winding 2a are electrically connected by caulking a metal sleeve 8 inserting them, the sleeve 8 is pushed in the holding part 9a of a bush 9 comprising an insulation material rich in elasticity while the bush 9 is elastically deformed, and the sleeve 8 is fixed on the bush 9 by the elastic force of the bush 9. Thereby the connection working man-hours and the part number of the lead wire 2c and the leader line 7 of the stator winding 2a can be reduced. Furthermore, since the height size A of the bush 9 is smaller than the height size B of the conventional terminal base, the axial length of the rotating electric appliance 1 is reduced and its frame can be miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating electric machine such as a generator or an electric motor, and more particularly to a structure of a connecting portion between a stator winding and a lead wire.

[0002]

2. Description of the Related Art Conventionally, there is a structure as shown in FIG. 4 as a structure of a connecting portion for electrically connecting a lead wire and a lead wire of a stator winding in a rotating electric machine.

In the rotating electric machine 100 according to the prior art, a terminal 102 made of resin in which a terminal 102 is integrally formed is provided.
1 is fixed on the outer surface of the rear frame 5 of the rotary electric machine 100, and the lead wire 2c of the stator winding 2a and the lead wire 7 are joined to the terminal 102 by soldering or fusing.

[0004]

According to this method, the number of components such as the terminal block 101 and the like and the number of assembling steps are increased, and the physical size (length in the axial direction) of the rotary electric machine 100 is increased. .

[0005] The present invention has been made in view of the above problems, and simplifies the connection between a stator winding and a lead wire.
It is an object of the present invention to reduce the number of assembly steps and the number of parts and to reduce the size of a rotating electric machine.

[0006]

The present invention employs the following technical means to achieve the above object.

According to the rotating electric machine according to the first aspect of the present invention, the stator winding and the lead wire are electrically connected by caulking a sleeve through which both are inserted, and the sleeve is It is configured to be held in a groove provided in the bush. Thus, the number of assembly steps and the number of parts of the rotating electric machine can be reduced, and the rotating electric machine can be downsized.

According to the rotating electric machine according to the second aspect of the present invention, the sleeve is inserted into the groove of the bush by elastically deforming the bush, and the sleeve is held by the bush by the elastic force of the bush. Thus, the sleeve can be easily attached to the bush, and the sleeve can be securely fixed to the bush.

According to the rotating electric machine of the third aspect of the present invention, the groove has an opening and a holding portion, and the cross-sectional shape orthogonal to the axial direction of the holding portion is rectangular or circular, and its width dimension or inner diameter. The dimensions were set smaller than the outer diameter of the sleeve, and the width of the opening perpendicular to the axial direction was set smaller than the width or inner diameter of the holding part. Thus, when the sleeve is mounted on the bush, the bush can be securely elastically deformed, so that the sleeve can be securely fixed to the bush. Further, it is possible to prevent the sleeve from falling off from the bush when assembling or using the rotating electric machine.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals.

FIG. 1 is an axial sectional view of a rotating electric machine according to an embodiment of the present invention. The rotary electric machine 1 includes a stator 2, a rotor 3, a drive frame 4 that supports one end of the rotor 3 and fits and fixes the stator 2, and a drive frame that supports the other end of the rotor 3. A rear frame 5 and the like fitted and fixed coaxially with the frame 4 are provided.

The stator 2 includes a stator winding 2a and a stator core 2b, and is fitted and fixed to the inner peripheral side of the drive frame 4. A plurality of slots (not shown) are provided in the stator core 2b so as to accommodate the multi-phase stator winding 2a.
Are formed. The stator winding 2a provided in the slot of the stator core 2b is formed of a copper wire having a circular or rectangular cross section.

[0013] The stator winding 2a is connected to the rear frame 5 through a through hole 9c of a bush 9 to be described later.
Has been extended outside. And the lead wire 2c is
It is electrically connected to the lead wire 7 via the sleeve 8. The lead wire 7 is connected to an external electric device (not shown), and the stator winding 2a is electrically connected to the external electric device via the lead wire 7.

The rotor 3 rotates integrally with the shaft 3a. A gear or pulley for transmitting torque generated by the rotor or driving the rotor is fixed to one end of the shaft 3a.

The sleeve 8 is a cylindrical good conductor metal of electricity,
For example, the stator winding 2 a
By caulking in a state where the lead wire 2c and the lead wire 7 are inserted, both wires are electrically connected.

The bush 9 is formed of an elastic insulating material, for example, resin or rubber, and is attached to the outer surface of the rear frame 5. The bush 9 is provided with a fitting portion 9e that fits into the through hole 5a of the rear frame 5, and a locking portion 9f that locks with the projection 5b of the rear frame 5, and the fitting portion 9e fits with the through hole 5a. And the locking portion 9f is
b, the bush 9 is connected to the rear frame 5.
Is held. The bush 9 has a holding portion 9a which communicates with the opening 9b to receive and hold the sleeve 8, and a fitting portion 9e.
A through-hole 9c for extending the lead wire 2c of the stator winding 2a to the outside of the rear frame 5 and a guide groove 9d communicating the through-hole 9c and the holding portion 9a are provided substantially coaxially. . The lead wire 2c goes out of the rear frame 5 through the through hole 9c and is connected to the sleeve 8 held by the holding portion 9a via the guide groove 9d. Here, the cross-sectional shape of the holding portion 9 a orthogonal to the axial direction is circular, and the diameter is set smaller than the outer diameter of the sleeve 8. The width of the opening 9b is set smaller than the diameter of the holding portion 9a. Further, the bush 9 is provided with a projection 9g. When the cover 10 is fixed, the projection 9g is pressed and compressed by the cover 10, so that the bush 9 is prevented from moving in the axial direction.

The cover 10 is formed by press-forming a metal plate, for example, an aluminum plate, and protects the bush 9 and the sleeve 8 arranged outside the rear frame 5.

Next, a process of connecting the lead wire 2c of the stator winding 2a and the lead wire 7 will be described. The assembling of the rotating electric machine 1 is almost completed, and a connection process is performed before the cover 10 is attached. At this point, the lead wire 2 of the stator winding 2a
c is drawn out to the outside of the rear frame 5 through the through hole 5 a of the rear frame 5.

First, the bush 9 is mounted on the rear frame 5. At this time, the lead wire 2c is connected to the through hole 9c of the bush 9.
After passing through the fitting portion 9e of the bush 9,
The engagement portion 9f of the bush 9 is fitted to the through hole 5a.
To the projection 5b of the rear frame 5. That is, the bush 9 can be easily fixed by the operator pushing it in with his / her finger.

Next, after the lead wire 2c is inserted from one end of the sleeve 8 and the lead wire 7 is inserted from the other end of the sleeve 8, the sleeve 8 is caulked to connect the lead wire 2c and the lead wire 7. Subsequently, the lead wire 2c is fitted into the guide groove 9d of the bush 9, and the sleeve 8 is pushed in while pushing the opening 9b of the bush 9 until it fits in the holding portion 9a. FIG. 3 is a partial cross-sectional view showing a state in which the sleeve 8 is attached to the holding portion 9a of the bush 9. At this time, since the inner diameter of the holding portion 9a is smaller than the outer diameter of the sleeve 8, the bush 9 is elastically deformed, and the sleeve 8 is firmly held by the bush 9 by the elastic force. Further, as shown in FIG. 3, since the width W of the opening 9 b is smaller than the outer diameter D of the sleeve 8, the sleeve 8 is prevented from falling off from the bush 9. Here, the inner diameter of the holding portion 9a is set such that the elastic force (that is, the holding force) acting on the sleeve 8 becomes a predetermined magnitude. The width of the opening 9b is set to such a size that the sleeve 8 does not fall off from the bush due to external force such as vibration during use of the rotary electric machine 1 and that the sleeve 8 can be easily attached to the holding portion 9a in the connection process. Is set. Further, the height dimension of the bush 9 (A in FIG. 1)
May be the sum of the outer diameter of the sleeve 8 and the thickness required to insulate the sleeve 8 from the rear frame 5 and the cover 10. Therefore, the height of the terminal block 101 of the conventional rotary electric machine 100 (B in FIG. 4) can be significantly reduced.

In the rotating electric machine 1 according to the present embodiment described above, the lead wire 2c and the lead wire 7 of the stator winding 2a are electrically connected by caulking the sleeve 8 through which both are inserted. Further, the sleeve 8 is pushed into the holding portion 9 a provided on the bush 9 while elastically deforming the bush 9.
Is fixed to the bush 9. Thereby, the connection step (stator winding 2a and terminal 10
2, the lead wire 7 and the terminal 102) are caulked once for the sleeve 8, and the screw tightening work for fixing the terminal block 101 to the rear frame 5 is as simple as pushing the bush 8 with fingers. The man-hour and the number of parts can be reduced. Furthermore, since the height A of the bush 9 is smaller than the height B of the conventional terminal block, the axial length of the rotary electric machine 1 can be shortened and the physical size can be reduced.

In the rotating electric machine 1 according to the embodiment of the present invention described above, the cross-sectional shape of the holding portion 9a of the bush 9 perpendicular to the axial direction is circular, but it may be rectangular.

In this embodiment, the number of the stator windings 2a, that is, the number of the lead wires 7 is three.
This may be increased or decreased according to the specification of the rotating electric machine to be applied.

[Brief description of the drawings]

FIG. 1 is an overall sectional view in the axial direction of a rotating electric machine 1 according to an embodiment of the present invention.

FIG. 2 is a view taken in the direction of the arrow in FIG. 1 and shows a state in which a cover 6 is removed.

FIG. 3 is a sectional view taken along line III-III of the bush 9 in FIG.

FIG. 4 is an overall cross-sectional view in the axial direction of a rotating electric machine 100 according to the related art.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rotating electric machine 2 stator 2a stator winding 2b stator core 2c lead wire 3 rotor 3a shaft 4 drive frame 5 rear frame 5a through hole 5b projection 6 cover 7 lead wire 8 sleeve 9 bush 9a holding portion (groove) 9b Opening (groove) 9c Through hole 9d Guide 9e Fitting 9f Engagement 9g Projection 100 Rotating machine 101 Terminal block 102 Terminal A Height B Height D D Outside diameter W Width

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H604 AA08 BB01 BB08 BB10 BB14 CC01 CC05 DA14 DB16 DB17 PB03 PC03 PC05 QB03 QB16 5H605 AA08 BB05 BB10 CC06 EC01 EC02 EC04 FF06 FF08 GG03

Claims (3)

[Claims] 1. A stator having a stator winding wound thereon, and a lead wire electrically connected to the stator winding and connecting the stator winding to an external electric device. In the rotating electric machine, the stator winding and the lead wire are electrically connected by caulking a sleeve through which both are inserted, and the sleeve is housed and held in a groove provided in a bush. Characteristic rotating electric machine. 2. The rotating electric machine according to claim 1, wherein the bush is elastically deformed, the sleeve is inserted into the groove, and the sleeve is held by the bush by an elastic force of the bush. 3. The groove has an opening and a holding portion, and has a rectangular or circular cross section orthogonal to the axial direction of the holding portion, and has a width or an inner diameter smaller than an outer diameter of the sleeve. 3. The rotating electric machine according to claim 2, wherein a width dimension orthogonal to the axial direction of the opening is set smaller than a width dimension or an inner diameter dimension of the holding section. 4.