JPH01103137A - Motor - Google Patents

Abstract

PURPOSE:To obtain a motor on which radiation fins are easily mounted with less time by forcedly fitting a radiation sleeve formed a plurality of radiation fins on the periphery thereof on a motor frame. CONSTITUTION:A radiation sleeve 6 as another component is forcedly fitted on the periphery of a motor frame 3. The radiation sleeve 6 has the plural row of radiation fins 7 in the shape of a waveform in the direction of the width and is a barrel body of a belt-like material on which a top section and a bottom section are alternately arranged. The internal diameter of the radiation sleeve 6 is smaller than that of the motor frame 3, the inside of each radiation fin forms a groove 8, and is expanded elastically by expansion of the groove 8. At the time of force fit, the radiation sleeve 6 expands in the radial direction, but the return-force is the holding force after force-fit was made. A waveform- like construction of the radiation sleeve 6 is so designed that the inside of each radiation fin has an open hollow at the end section, so that this construction works effectively in terms of radiation effect.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric motor having radiation fins on the outer periphery of a motor frame.

[Prior Art] Conventionally, heat dissipation fins provided on the outer periphery of a motor frame of an electric motor are either integrally molded with the motor frame 10 or configured as a separate part, and fixed to the motor frame 10 by means such as welding. ing. An electric motor having the latter configuration has a cross section U as shown in FIGS. 4 and 5, for example.
In this structure, a plurality of heat dissipating fin members 11 formed into a letter shape or other shape convenient for heat dissipation and installation are fixed to the outer periphery of the motor frame 10 at intervals in the circumferential direction.

Heat associated with the operation of the electric motor is radiated to the outside by heat radiating fins arranged around the outer periphery of the motor frame 10 and arranged in a row.

[Problems to be Solved by the Invention] The conventional heat radiation fin member 11 described above is used in the motor frame 1.
In the electric motor configured to be fixed to the outer periphery of the heat radiation fin member 11, there is a problem that attachment of the radiation fin member 11 to the electric motor frame 10 is troublesome and time-consuming. That is, in order to constitute a radiation fin, each radiation fin member 1 formed individually must be
1 on the motor frame 10 using a positioning jig or the like, and then each radiation fin member 11 must be individually fixed to the outer periphery of the motor frame 10 by welding or the like.

This invention was made in order to solve such conventional problems, and the object is to obtain a motor in which a plurality of heat dissipation fins are collectively configured on the motor frame, and the heat dissipation fins can be easily installed and do not require much time. do.

[Means for Solving the Problems] In the electric motor according to the present invention, a heat dissipation sleeve having a plurality of radially protruding heat dissipation fins formed on the outer periphery is press-fitted into a motor frame.

[11: For] In this invention, the necessary number of heat dissipation fins are formed in a series of continuous configurations on the heat dissipation sleeve, so that a plurality of heat dissipation fins can be installed simply by press-fitting the heat dissipation sleeve onto the outer periphery of the motor frame. They can be configured all at once, and by attaching them to the motor frame with one heat radiation fin or a part of the heat radiation sleeve as a reference, the positional relationship between the motor frame and all of the heat radiation fins is determined.

[Embodiment] Figures 1 and 2 both show an electric motor as an embodiment of the present invention. That is, the rotating shaft 2 integrated with the rotor 1 is rotatably supported at both ends via bearings 4 by a motor frame 3 that constitutes the outer shell of the motor.

A stator 5 is fixed to the inner periphery of the motor frame 3 and faces the outer periphery of the rotor 1 with a gap therebetween.

Furthermore, as shown in FIG. 3, a heat dissipation sleeve 6 configured as a separate component is fixed to the outer periphery of the motor frame 3 by press fitting. The heat dissipation sleeve 6 is made of metal, and has double rows of heat dissipation fins 7 formed in a folded shape in the width direction, and the ends of the band material are joined by butting each other with peaks and valleys arranged alternately. It is obtained by either forming a cylinder into a cylinder, or by integrally molding the above structure using another molding means. The inner diameter of the heat dissipation sleeve 6 is formed to be slightly smaller than the outer diameter of the motor frame 3, but since the inner diameter of each heat dissipation fin 7 is approximately 8 mm, it expands elastically by expanding and contracting the grooves 8. obtain.

Therefore, if the heat dissipation sleeve 6 is press-fitted on the outer periphery of the motor frame 3 using one heat dissipation fin 7 or a part of the heat dissipation sleeve 6 as a reference, a plurality of radii with fixed positional relationships can be formed on the outer circumference of the motor frame 3. The radiation fins 7 that protrude in the direction are collectively constituted. During press-fitting, the heat dissipating sleeve 6 expands in the radial direction, but its return force becomes the holding force after press-fitting. The folded L-shaped structure of the heat dissipation sleeve 6 is
As described above, this is not only convenient for attachment to the motor frame 3, but also has an advantageous effect on heat radiation because the inside of each radiation fin 7 is a cavity open at the end.

[Effects of the Invention] As is clear from the above description of the embodiments, the electric motor of the present invention has a heat dissipation sleeve having a plurality of radially protruding heat dissipation fins formed on the outer periphery press-fitted into the motor frame. Since several heat dissipation fins are formed in a series of continuous configurations on the heat dissipation sleeve, multiple heat dissipation fins can be configured at once by simply press-fitting the heat dissipation sleeve onto the outer periphery of the motor frame. If the heat dissipation fin or a part of the heat dissipation sleeve is attached to the motor frame as a reference, the positional relationship between the motor frame and all the heat dissipation fins is determined. Therefore, the heat dissipation fin
It is possible to obtain an electric motor that is easy to size and does not require much time.

[Brief explanation of the drawing]

FIG. 1 is a front view partially including a cross section showing the configuration of an electric motor as an embodiment of the present invention, and FIG. 2 is a side view thereof.
3 is an end view showing only the heat dissipation sleeve, FIG. 4 is a front view partially including a cross section showing the structure of a conventional electric motor, and FIG. 5 is a side view thereof. , 1 is a rotor, 3 is a motor frame, 6 is a heat radiation sleeve, and 7 is a heat radiation fin. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent: Masuo Oiwa (2 people) Figure 2, Figure 3, Figure 4, Figure 3.

Claims (2)

[Claims] (1) An electric motor characterized in that a heat dissipation sleeve having a plurality of radially protruding heat dissipation fins formed on the outer periphery is press-fitted into an electric motor frame constituting an outer shell. (2) The electric motor according to claim 1, wherein the heat dissipation fin has an integral structure in which the outer peripheral portion of the heat dissipation sleeve is folded.