JP4536664B2 - Condenser mounted induction motor and ventilator - Google Patents

Description

  The present invention relates to an internal-rotation condenser-mounted induction motor and a ventilator using the same as a drive machine.

  Usually, in a capacitor-mounted induction motor, a terminal block is provided inside a bracket that forms an outer shell on the non-load side of the motor, and a capacitor is mounted on the terminal block. However, when the electric motor is downsized, the rotating shaft gets in the way and it is impossible to provide a condenser inside. Therefore, a configuration is adopted in which a terminal block is provided outside the bracket, a capacitor is mounted on the terminal block, and the outside is covered with a cover. When a capacitor is mounted on a terminal block outside the bracket, a hole must be made in the bracket to electrically connect the winding and the terminal block, and a conductive pin connected to the winding must be penetrated. Since many brackets are made of metal conductors, it is necessary to insulate the conductive pins from the brackets. Insulator cylinders are provided on the terminal block, and the conductive pins are passed through them to insulate the brackets. Yes. This type of prior art is disclosed in Patent Document 1.

JP-A-3-203551

  However, since the conductive pin that penetrates the bracket is very long and thin, if the root of the conductive pin is tilted even a little, the tip is greatly shaken and it is difficult to pass through the hole of the bracket or the terminal block. In addition, when the conductive pins are joined with solder on the terminal block, if the solder drips from the hole through which the conductive pin passes, the bracket and the solder come into contact with each other, resulting in poor insulation. That is, this type of conventional condenser-mounted induction motor has a problem that it is troublesome to assemble and has low productivity.

  The present invention has been made in order to solve the above-described problems, and the object of the present invention is to obtain a capacitor-mounted induction motor that can be easily assembled and promotes downsizing with good productivity, and stable quality. The purpose is to obtain a small-sized and excellent performance ventilation device using the condenser-mounted induction motor.

In order to solve the above-mentioned problems, the present invention relates to a capacitor-mounted induction motor in which a capacitor is arranged on the outer surface in the axial direction of a bracket that constitutes the outer shell on the anti-load side, and rigidity is provided between the winding end of the stator and the bracket. Yes and an insulating member covering the winding end of the stator, its insulating member, integrally a sleeve through which conductive pins lead wire has been tied in the windings of the rolled out stator through the bracket The means provided in is adopted.

Other invention to solve the above problems, a condenser disposed in the axial outer table bracket constituting an outer shell of the anti-load side, have a rigidity between the winding end and the bracket of the stator the fixed an insulating member covering the winding end of the child provided, condenser that the insulating member, having a sleeve through which conductive pins lead wire has been tied in the windings of the rolled out stator through the bracket together A means for driving the impeller by the mounted induction motor is adopted.

  According to the present invention, a conductive pin can be guided and inserted through a sleeve of an insulating member, and even a long conductive pin can be assembled while correcting a fall, and a stable capacitor-mounted induction motor with high productivity can be obtained. .

  Moreover, according to another invention, the ventilation apparatus which can be reduced in size and the improvement of air volume performance is obtained.

  The condenser-mounted induction motor of the present invention is an internal rotation type. The rotor is supported by a bearing mounted on a metal bracket and a frame whose rotating shaft constitutes the outer shell. The bearing on the opposite side of the bearing is fitted in a bearing housing formed on the bracket. A terminal block having a diameter substantially equal to the diameter of the bracket is mounted on the coaxial line on the end surface in the axial direction of the bracket. The terminal block is formed of an insulating resin in a circular shallow container shape, and a capacitor is housed in the center thereof. The terminal block is covered with a cover fitted to the bracket. A ventilation device that drives the impeller is configured using the condenser-mounted induction motor as a drive.

Between the winding end of the stator and the bracket, an insulating member made of resin and having rigidity is provided. The insulating member has a ring shape, and is fitted and attached to an axial end of an insulator that insulates the winding from the stator core and is locked by side claws. The insulator, the conductive pin in the axial direction is provided with press-fit into the hole, the base of the conductive pins of the winding lead wire is entwined and soldered. The insulating member is provided with a recess in the axial direction that avoids contact with and disconnection from the lead wire of the winding entangled with the conductive pin, and further extends through a hole opened in the bracket so that it is connected to the terminal block. A sleeve reaching up to is formed integrally. The sleeve is formed in a taper shape whose inner diameter gradually decreases from the beginning to the end, and a conductive pin is inserted through the sleeve, and is joined to the terminal by solder at a tip portion penetrating the terminal block. The terminal is installed on the terminal block and electrically connects the capacitor, the lead wire and the conductive pin.

In this condenser-mounted induction motor, the conductive pin penetrates the bracket and becomes long during assembly. Therefore, there is no need for trouble such as correction and adjustment of the conductive pins. Moreover, even if the winding is loosened and a floating line is generated that floats from the insulator, the floating line does not contact the bracket because it is covered with the insulating member. Although the distance between the winding and the bracket has been increased as a countermeasure against floating lines, it is not necessary to reduce the axial dimension of the motor, and further miniaturization can be promoted. Since the insulating member recess for avoiding contact with the lead wire of the winding is tied to the conductive pin is provided, a trouble that would cut the windings of the lead wire when mounting the insulating member Can also be avoided. This condenser-mounted induction motor is reduced in size, and the motor performance can be improved by increasing the capacity of the condenser. And as a ventilator which turns an impeller by using this as a drive machine, size reduction and improvement of air flow performance can be promoted.

Embodiment 1 FIG.
The present embodiment shown in FIGS. 1 to 7 relates to a ventilator. 1 is a cross-sectional view of a ventilator, FIG. 2 is a cross-sectional view of a condenser-mounted induction motor that moves an impeller of the ventilator, and FIG. 3 is a perspective view showing a stator portion of the condenser-mounted induction motor with an insulating member removed. 4 is a perspective view showing a stator portion of a capacitor-mounted induction motor, FIG. 5 is a perspective view showing a state where a bracket of the capacitor-mounted induction motor is covered, and FIGS. 6 and 7 are enlarged sectional views showing the shape of the sleeve. FIG.

  In this ventilation device 1 shown in FIG. 1, the drive source that rotates the impeller 2 is constituted by a condenser-mounted induction motor 3 having the configuration shown in FIGS. 2 to 4. The condenser-mounted induction motor 3 is an internal rotary type in which a rotor 4 rotates in a stator 5, and an insulator 6 made of an insulating material whose outer peripheral portion is curved in a slot formed by a plurality of teeth. And the stator 5 around which the winding 7 is wound. The iron core of the stator 5 includes a tooth and an outer ring yoke portion, and the outer ring yoke portion is press-fitted into the tooth.

  The rotor 4 is supported by a bearing 12 attached to a metal bracket 9 and a frame 10 whose rotating shaft 8 forms an outer shell. The bearing 12 on the opposite side of the bearing 12 is fitted in a bearing housing formed on the bracket 9. A terminal block 13 having a diameter substantially equal to the diameter of the bracket 9 is mounted on the coaxial line on the end surface of the bracket 9 in the axial direction. The terminal block 13 is formed of an insulating resin in a circular shallow container shape, and a capacitor 14 is accommodated in the center thereof. The terminal block 13 is covered with a cover 15 that is joined to the joining flange of the bracket 9.

Between the winding end 7a of the stator 5 and the bracket 9, an insulating member 16 made of resin and having rigidity is provided. The insulating member 16 has a ring shape, and is fitted and attached to the axial end of the insulator 6 that insulates the winding 7 and the stator core as shown in FIG. A plurality of conductive pins 17 are press-fitted into the holes in the insulator 6 in the axial direction, and lead wires 7b of the windings 7 are entangled and soldered to the bases of the respective conductive pins 17 (FIG. 2). reference). The insulating member 16 is provided with a concave portion 18 on the inner side in the axial direction for avoiding contact with the lead wire 7b of the winding 7 entangled with the conductive pin 17, and further penetrates the hole 19 opened in the bracket 9. A sleeve 20 that extends to the terminal block 13 is integrally formed. The sleeve 20 is formed in a taper shape in which the inner diameter gradually decreases from the beginning to the end, and the conductive pin 17 is inserted into the sleeve 20 and joined to the terminal 21 and the solder 22 at the tip of the pin penetrating the terminal block 13. ing. For example, the sleeve 20 has a minimum inner diameter of 1.2 mm and a taper angle of 30 degrees with respect to the pin diameter of the conductive pin 17 of 0.6 mm. This prevents the tip of the conductive pin 17 from being inserted out of the hole 19 in the bracket 9 and cannot be inserted out of the hole in the terminal block 13, so that the assembly operation can be performed smoothly. The terminal 21 is installed on the terminal block 13 and electrically connects the capacitor 14 and the lead wire to the conductive pin 17.

  As shown in FIG. 6, the distal end of the sleeve 20 may have a tapered outer periphery. By making the hole of the terminal block 13 in accordance with the shape, the sleeve 20 can be easily inserted. Even if the position accuracy of 19 is poor, it can be assembled smoothly. In addition, as shown in FIG. 7, a concave solder pool 23 may be provided at the penetrating tip of the conductive pin 17 of the sleeve 20. The solder pool 23 is opened larger than the hole of the terminal block 13. Thereby, even if the solder 22 leaks from the hole of the terminal block 13, it stays in the solder pool 23 and does not conduct with the bracket 9 due to the leaked solder.

In this condenser-mounted induction motor 3, the conductive pin 17 is long because it penetrates the bracket 9 in the assembly. Since correction is made by gradual reduction, there is no need for trouble such as correction and adjustment of the conductive pins 17. Even if the winding 7 is loosened and a floating line floating from the insulator 6 is generated, the floating line does not come into contact with the bracket 9 because it is covered with the insulating member 16. Up to now, the distance between the winding 7 and the bracket 9 has been increased as a countermeasure against floating lines, but this is no longer necessary, the axial dimension of the motor can be reduced, and further miniaturization can be promoted. Since the insulating member 16 recess 18 to avoid contact with the lead wire 7b of the winding 7, which is tied to the conductive pin 17 is provided, the output wires 7b of the winding 7 when mounting the insulating member 16 The trouble that cuts off can be avoided. The condenser-mounted induction motor 3 is reduced in size, and the motor performance can be improved by increasing the capacity of the capacitor 14. And as ventilation apparatus 1 which rotates impeller 2 using this as a drive machine, size reduction and improvement in air volume performance can be promoted.

It is sectional drawing of a ventilation apparatus. (Embodiment 1) It is sectional drawing of the condenser mounting induction motor which moves the impeller of a ventilation apparatus. (Embodiment 1) It is a perspective view which removes an insulating member and shows a stator part of a capacitor loading induction motor. (Embodiment 1) It is a perspective view which shows the stator part of a capacitor | condenser mounting induction motor. (Embodiment 1) It is a perspective view of the state which covered the bracket of the induction motor with a capacitor. (Embodiment 1) It is an expanded sectional view which shows the shape of a sleeve. (Embodiment 1) It is an expanded sectional view which shows another shape of a sleeve. (Embodiment 1)

DESCRIPTION OF SYMBOLS 1 Ventilator, 2 Impeller, 3 Condenser induction motor, 4 Rotor, 6 Insulator, 7 Winding, 7a Winding end, 7b Lead wire, 9 Bracket, 13 Terminal block, 14 Condenser, 16 Insulating member, 17 Conductive pin, 18 recess, 20 sleeve, 23 solder pool

Claims (5)

A condenser mounted induction motor arranged a condenser in the axial direction outside the table bracket constituting an outer shell of the anti-load side, the windings of the stator have a stiffness between the winding end and the bracket of the stator an insulating member covering an end provided, wherein the insulating member is a condenser mounted induction motor provided integrally with the sleeve through the conductive pins lead wire has been tied windings of extending out said stator through said bracket . A condenser mounted induction motor according to claim 1, a condenser mounted induction motor is gradually decreased inner diameter of the sleeves. 3. The capacitor-mounted induction motor according to claim 1 , wherein a concave solder pool is provided at a leading end portion of the sleeve passing through the conductive pin. A condenser mounted induction motor according to any one of claims 1 to 3, wherein the insulating member is provided with a recess to avoid contact between the lead wire which is tied to the conductive pins in the axial direction Induction motor with condenser. A ventilator configured to drive an impeller by the condenser-mounted induction motor according to any one of claims 1 to 4 .

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