JP4537331B2 - Electric motor and ventilator - Google Patents

Description

  The present invention relates to an electric motor and a ventilation device that drives an impeller with the electric motor.

  As a conventional electric motor, an electrical component mounted on the frame, an electrical component wire wired to the electrical component, a terminal block provided on the frame, and a connector provided with terminals and mounted on the terminal block And a driving wire wired to the terminal, a frame-shaped portion that fits the terminal block and the connector, and forms a fitting space through which the driving wire is inserted, and this frame-shaped portion is on one side. A first holding portion that is formed in an extended shape and constitutes a wiring space through which the electric component wire is inserted, and has a U-shape, and the U-shaped opening is locked to the upper and lower edges of the frame-shaped portion. Wiring composed of a second holding portion that constitutes a wiring space through which the electric component electric wire inserted through the first holding portion is disposed at an edge of the fitting space near the first holding portion. Holding wire, and holding and fixing the drive wire and electrical component wire by the wiring holder. And, as an external force is not applied terminal even when an external force is applied, the wire bonding portion such as a connector to the wire, there is that as the wire bonding portion is not disengaged (e.g., see Patent Document 1).

Japanese Patent Laid-Open No. 10-336948

  However, according to the conventional technique, there is a problem that the number of parts constituting the electric motor such as the wiring holder increases, resulting in an increase in manufacturing cost. In addition, there is a problem that it is necessary to draw the electric wire around the wiring holder, and the wiring work requires time and effort.

  The present invention has been made in view of the above, and an object of the present invention is to obtain an electric motor and a ventilator that are difficult to come off, have low manufacturing costs, and are easily wired.

In order to solve the above-described problems and achieve the object, the present invention provides a lead wire formed by projecting a plurality of lead wires joined to a lead wire joint portion of an electric motor on a cover covering the lead wire joint portion. outside the drawer of the motor through the lead-out portion, the drawn-out lead wire inserted into the protective tube, the electric motor so as to protect the lead wire by inserting the ends of the protective tube to the lead wire outlet portion, said A lead wire joint is provided on a terminal block installed on one end side of the frame of the electric motor , and when the end of the protective tube is inserted into the lead wire lead-out portion, the end of the protective tube is joined to the lead wire a stopper to prevent the entering the position of the part near, characterized in that formed integrally with the terminal block so as to protrude its tip end the lead wire in the lead section from the terminal block of an outer peripheral portion

  According to the present invention, there is an effect that the number of parts constituting the electric motor is small, wiring work is easy, and an electric motor with a stable quality of the lead wire joint portion can be obtained.

  Embodiments of an electric motor and a ventilator according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
FIG. 1 is a partially broken side view showing an embodiment of an electric motor according to the present invention, FIG. 2 is a plan view of a cover, FIG. 3 is a perspective view of a terminal block, and FIG. FIG. 5 is an enlarged view of part A in FIG. 1 showing before the protection tube is inserted, FIG. 5 is an enlarged view of part A in FIG. 1 after the protection tube is inserted, and FIG. 6 is an embodiment of the ventilator according to the present invention. FIG.

  As shown in FIG. 1, an electric motor 10 according to an embodiment includes a cylindrical rear frame 3a having a bottom plate, a cylindrical front frame 3b having a bottom plate, and stators housed in front and rear frames 3a and 3b. A stator 1 around which a coil 1a is wound, a rotary shaft 2a rotatably supported by front and rear frames 3a and 3b via bearings 2c and 2d, and a rotary shaft 2a mounted on the rotary shaft 2a and inserted into the stator 1 And driven rotor 2. The front and rear frames 3a and 3b are fastened by flange portions 3c and 3d to constitute the frame 3.

  On the rear end side of the rear frame 3a as one end side of the frame 3, a disk-shaped terminal block 4 shown in FIG. A capacitor or the like is mounted in the central recess 4 a of the terminal block 4, and the stator coils 1 a and 1 a are connected to the terminals on the distribution terminal block 4. A plurality of (two) lead wires 5 and 5 as power supply lines are joined to this terminal by soldering or the like.

  The two lead wires 5 and 5 are separately passed through two wiring passages 4c and 4c (see FIG. 3) partitioned by a partition plate (insulating plate) 4b provided on the terminal block 4, and are external to the motor 10. (See FIG. 1). The terminal block 4 to which the lead wires 5 and 5 are joined is covered with a cylindrical cover 6 having a lead wire lead-out portion 6a and a bottom plate, and the flange portion 6b of the cover 6 is a flange portion of the front and rear frames 3a and 3b. Fastened to 3c and 3d.

  As shown in FIG. 2, the lead wire lead-out portion 6a is formed by projecting the outer peripheral portion of the cover 6 outward in a semi-cylindrical shape. As shown in FIG. 3, the stopper 4d formed as the outer end portion of the partition plate 4b protrudes about 2 mm outward from the outer peripheral portion of the terminal block 4 and enters the lead wire lead-out portion 6a to be described later. It becomes the stopper 4d of the tube 7. In other words, it can be said that the stopper 4d also functions as a partition plate.

  As shown in FIG. 4, the lead wires 5 and 5 drawn to the outside of the electric motor 10 through the lead wire lead portion 6a are inserted into a flexible resin protective tube 7, and the end portion 7a is slid by sliding the protective tube 7. To the entrance of the lead wire lead-out portion 6a of the cover 6. Subsequently, as shown in FIG. 5, the end portion 7a is inserted into the lead wire lead-out portion 6a and brought into contact with the stopper 4d. The protective tube 7 is prevented from entering the position near the lead wire joint (position P shown in FIG. 5) by the stopper 4d.

  The approach distance of the protective tube 7 into the lead wire lead-out portion 6a is about 4 mm. The outer diameter dimension of the protective tube 7 and the inner diameter dimension of the lead wire lead-out portion 6a are interference fit dimensions. If the protective tube 7 is inserted to the stopper 4d position, the protective tube 7 will not fall out due to frictional resistance. . Further, the interference fit dimension prevents foreign matters such as dust from entering between the protective tube 7 and the lead wire lead-out portion 6a.

  When the protective tube 7 enters the position P in the vicinity of the lead wire joint portion, an upward force in FIG. 4 acts on the lead wires 5 and 5 and acts so as to peel off the lead wire joint portion. Although the quality is deteriorated, in the electric motor 10 of the embodiment, the protective tube 7 does not enter the position P in the vicinity of the lead wire joint portion by the stopper 4d, so the quality of the joint portion is stabilized. In addition, there is no need for a component such as a wiring holder, and there is no need to route the lead wire around the wiring holder.

  As shown in FIG. 6, when the impeller 20 is mounted on the rotating shaft of the electric motor 10 of the embodiment, the electric motor 10 is attached to a frame 30 of a ventilation fan as a ventilation device, and the impeller 20 is driven by the electric motor 10. This is the ventilation device 50 of the embodiment. The ventilation device 50 has a small number of parts, easy wiring work, and the quality of the lead wire joint portion of the electric motor 10 is stable.

  In the electric motor 10 of the embodiment, the stopper 4d is provided on the terminal block 4. However, the stopper may be formed by protruding a part of the wall of the lead wire lead-out portion 6a inward.

  The electric motor according to the present invention is useful as an electric motor for a ventilator because the number of parts constituting the electric motor is small, wiring work is easy, and the quality of the lead wire joint is stable.

It is a partially broken side view showing an embodiment of an electric motor according to the present invention. It is a top view of a cover. It is a perspective view of a terminal block. It is the A section enlarged view of Drawing 1 showing protection tube insertion. It is the A section enlarged view of FIG. 1 which shows after protection tube insertion. It is side sectional drawing which shows embodiment of the ventilation apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator 2 Rotor 3 Frame 3a Rear frame 3b Front frame 4 Terminal block 4b Partition plate 4d Stopper 5 Lead wire 6 Cover 6a Lead wire lead-out portion 7 Protection tube 7a End portion P Position near lead wire joint portion 10 Motor 20 Blade Car 30 Ventilation fan frame 50 Ventilation fan (ventilator)

Claims (4)

A plurality of lead wires joined to the lead wire joint of the electric motor are drawn out to the outside of the motor through a lead wire lead-out portion formed on the cover that covers the lead wire joint, and the lead wires drawn out are used as protective tubes. In the electric motor that is inserted, and the end portion of the protective tube is inserted into the lead wire lead-out portion to protect the lead wire,
The lead wire joint portion is provided on a terminal block installed on one end side of the frame of the electric motor,
When inserting the end portion of the protective tube into the lead wire lead-out portion, a stopper that prevents the end portion of the protective tube from entering a position near the lead wire joint portion is provided from the outer peripheral portion of the terminal block. An electric motor characterized by being provided integrally with the terminal block so that a tip end portion thereof protrudes into a lead wire lead-out portion . The electric motor according to claim 1, wherein the stopper also functions as a partition plate that separates and insulates the plurality of lead wires in the cover.   The outer diameter dimension of the protective tube and the inner diameter dimension of the lead wire lead-out portion are interference fit dimensions, and foreign matter can be prevented from entering the motor from between the protective tube and the lead wire lead-out portion. The electric motor according to claim 1. A ventilator characterized in that the impeller is driven by the electric motor according to any one of claims 1 to 3 .

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