JPS5936133Y2 - Rotating electric machine with heat pipe - Google Patents

Description

[Detailed description of the invention] This invention is an improved rotating shaft with a heat pipe that has a simple structure in which multiple disc-shaped heat dissipation fins can be fitted to the rotating shaft at regular intervals without tilting. Regarding electrical equipment.

Generally, in a rotating electrical machine with a heat pipe, a plurality of disc-shaped heat dissipating fins 2 are fitted to the heat dissipating part of a rotating shaft 1 formed by a heat pipe to efficiently dissipate heat, as shown in FIGS. 1 and 2. There is.

Conventionally, a boss 2a is formed by extrusion processing in the axial direction at the center of the heat dissipating fin 2, and a plurality of heat dissipating fins 2 are rotated through a cylindrical sleeve 3 while maintaining a distance from each other by the boss 2a. It was attached to shaft 1.

Although such a structure is simple, the axial dimension of the boss 2a is not constant due to the extrusion process, and as a result, the heat dissipation fins 2 cannot be arranged at regular intervals, resulting in a decrease in heat dissipation efficiency. If the heat dissipating fins 2 are bent and installed at an angle, vibrations will be generated as the rotary shaft 1 rotates, and a large number of steps will be required to attach the large number of heat dissipating fins 2.

In order to eliminate the above-mentioned drawbacks, this invention has a heat pipe with a simple structure in which a plurality of disc-shaped heat dissipation fins can be fitted onto a rotating shaft at regular intervals without tilting. The purpose is to provide electric motors.

In order to achieve the above object, this invention provides a rotating electric machine with a heat pipe in which a plurality of disc-shaped heat dissipation fins are fitted to the heat dissipation part of a rotating shaft formed by a heat pipe. , is formed by extruding a boss that fits on the rotating shaft in the axial direction, and by providing a plurality of cut and raised pieces in the axial direction that overlap the outer periphery of the boss of the adjacent heat dissipation fin on the opposite side of the boss. Ru.

Hereinafter, embodiments of this invention will be described based on the drawings.

FIGS. 3 and 4 show the main parts of the rotary electric machine with a heat pipe according to this invention, and the parts indicated by the same reference numerals as in FIGS. 1 and 2 are the same parts.

The rotating electric machine in these figures has a disc-shaped heat dissipating fin 33 attached to an external protrusion of a rotating shaft 1, in which a rotor 32 enclosed in a stator 31 is fitted with a gap therebetween, via a cylindrical sleeve 3. are fitted multiple times.

The rotating shaft 1 is formed by a heat pipe having a heat absorbing part for absorbing the heat generated by the rotor 32 in the rotor 32 fitting part and a heat radiating part in the cut-out external projecting part, and the heat generated by the rotor 32 is mainly Heat is radiated from the surface of the heat radiation fin 33.

An air guide 35 is attached to the outer periphery of the bracket 34 that rotatably supports the rotating shaft 1, covering the heat radiating fins 33. A cooling fan 36 is provided that blows air orthogonally to the cooling fan 1 .

A cylindrical bore X33a for fitting into the sleeve 3 is formed in the center of the radiation fin 33 by extrusion processing in the axial direction from the other plate side on one plate side, and Boss 3 of radiation fin 33 adjacent to the plate surface side
A plurality of cut and raised pieces 33b in the axial direction are provided which overlap the outer periphery of 3a.

This cut and raised piece 33b has an axial length from the plate surface of the boss 33.
The cut and raised piece 33b is formed with a size slightly larger than a.
The tip of the radiating fin 33 comes into contact with the plate surface of the adjacent radiation fin 33.

Incidentally, the cut-and-raised piece 33bIIi is not necessary for the radiation fin located on the inside (the rightmost side in FIG. 3), so it is not necessary to provide it.

According to the above embodiment, the axial dimension of the cut and raised piece 33b formed by cutting and raising can be formed to be constant, so the heat dissipation fin is attached to the sleeve so that the tip of the cut and raised piece 33b touches the previous heat dissipation fin. If they are fitted, the intervals between the plurality of radiation fins 33 will be constant, and the raised pieces 33b of each radiation fin 33 will be fixed.
presses down the boss 33a of the adjacent heat dissipation fin from above, so the heat dissipation fin 33 is mounted at right angles to the rotating shaft 1,
It doesn't tilt.

Furthermore, by overlapping the boss 33a and the cut-and-raised piece 33b of the adjacent radiation fin 33, the required number of radiation fins 33 can be integrally assembled in advance. becomes easier.

In this case, as shown in FIGS. 4 and 5, the cut and raised pieces 3
When assembled by alternately shifting the positions of the parts 3b in the circumferential direction, the rigidity of the parts as a whole increases, so that they can be easily handled.

Furthermore, the cut and raised piece 33b, the boss 33a, and the radiation fin 3
Each heat dissipation fin 3 due to contact friction with the plate surface of 3
The effect of the rotation stopper in step 3 can be increased.

As described above, according to this invention, a boss that fits on the rotating shaft is pushed in the axial direction into the center of a plurality of disc-shaped heat radiating fins that fit on the heat radiating part of the rotating shaft formed by a heat pipe. The rotating electric machine with a heat pipe is constructed by providing a plurality of cut and raised pieces in the axial direction that overlap with the bosses of the adjacent heat dissipation fins on the opposite side of this boss. It can be fitted onto the rotating shaft without tilting, and therefore not only can heat be dissipated efficiently, but also vibrations caused by rotation can be prevented.

Furthermore, since the required number of heat dissipation fins can be pre-assembled integrally, the fitting operation becomes easier and the effect of preventing rotation of the individual heat dissipation fins can be increased.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view showing the main parts of a conventional rotating electrical machine with a heat pipe, Figure 2 is a vertical cross-sectional view taken along the line ■-■ in Figure 1, and Figure 3 is a rotating electrical machine with a heat pipe according to this invention. FIG. 4 is a vertical cross-sectional view taken along line IV--IV in FIG. 3, and FIG. 5 is an enlarged vertical cross-sectional view of the portion indicated by the symbol A in FIG. 3. 1...Rotating shaft, 33...Radiating fin, 33a...
Boss, 33b...cut and raised piece.

Claims (1)

[Scope of utility model registration request] In a rotating electrical machine with a heat pipe in which a plurality of disk-shaped heat dissipation fins are fitted to the heat dissipation part of a rotating shaft formed by a heat pipe, a boss that is fitted to the rotating shaft is placed in the center of the heat dissipating fin in the axial direction. It is formed by extruding to one side, and has a plurality of cut and raised pieces in the axial direction that overlap the outer periphery of the boss of the adjacent heat dissipation fin on the opposite side of this boss, and the tips of these cut and raised pieces are attached to the adjacent heat dissipation fins. A rotating electrical machine with a heat pipe, characterized in that it is brought into contact with the plate surface of the heat pipe.