JPS6130431Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a motor cooling device for a cooking machine or the like that transmits the rotation of a motor from a motor shaft to an output shaft via a pulley and a belt.

An embodiment of the present invention will be explained below with reference to the drawings. Reference numeral 1 denotes a cooking machine having the proposed structure, which is composed of a base 3 in which a motor 2 and the like are mounted, and a bottomed cylindrical container 4 mounted on the upper surface of the base 3 by bayonet connection. Reference numeral 5 denotes a base plate screwed into the base 3 with an elastic body interposed therebetween, and the base plate 5 includes a half part 6 of the motor case, a bearing part 8 of the motor shaft 7, and a base plate 3 protruding from the upper surface of the base 3. A bearing portion 10 of the output shaft 9 is integrally formed to support the motor 2, the motor shaft 7, and the output shaft 9. The upper end of the output shaft 9 protrudes into the container 4, and cutting blades 13 for cutting the material introduced from the material input cylinder 12 provided on the lid 11 are attached to the upper end so as not to rotate with respect to each other. A small pulley 14 is attached to the lower end of the motor shaft 7, a large pulley 15 is attached to the lower end of the output shaft 9, and both pulleys 14 and 15 are connected by a belt 16, so that the rotational force of the motor can be transferred. It is transmitted to the output shaft 9. A hanging wall 18 is formed integrally with the base plate 5 on the outer periphery of the belt 16 and the small pulley 14 to prevent wires to the switch 17 etc. from getting caught in these, and the lower edge of the hanging wall 18 is attached to the base. It is close to the back cover 19 attached to the bottom surface of the base 3. Ribs 21 are formed on the lower surface of the plurality of spokes 20 of the large pulley 15 to constitute a centrifugal fan. Note that the hanging wall 18 and the rib 21 are shown with diagonal lines in FIG. Further, a through hole 22 for sucking in cooling air is formed in the back cover 19 at a portion where the large pulley 15 is located.

Next, the action will be explained. When the motor 2 is operated to cut the material with the cutting blades 13, the large pulley 15 rotates. When the large pulley 15 rotates, cooling air is sucked in through the through holes 22 of the back cover 19 by a centrifugal fan made up of spokes 20 and blown in a radial direction. The cooling air thus blown is guided to the motor 2 by the hanging wall 18, passes through the motor, and is discharged to the outside of the base 3 through a through hole (not shown) formed in the side surface of the base. Since the large pulley 15 attached to the output shaft 9 constitutes a motor cooling fan, the amount of air blown can be significantly increased compared to the conventional cooling fan built into the motor, improving the cooling effect. do. Further, since the cooling air is guided to the motor using the hanging wall 18, no special parts are required, and since the hanging wall 18 is close to the back cover 19, the cooling air is not discharged to the outside of the base. The warm air flowing inside the stand is not used again as cooling air, and the cooling effect is good.

Note that when the large pulley 15 is attached to the motor shaft 7, the spokes of the large pulley may be made into a flat plate shape in the axial direction and twisted to form an axial flow fan.

As described above, in this proposal, the rotation of the motor is transmitted from the motor shaft to the output shaft by a pulley and belt, and the motor cooling fan is formed by the spokes of the pulley. This makes it possible to eliminate the cooling fan that was previously built into the motor, making the motor smaller, and also makes it possible to form the motor cooling fan without providing a separate cooling fan, reducing the number of parts, and if the diameter of the pulley is made larger than the diameter of the motor,
It is possible to install a fan with increased airflow,
This has great practical benefits, such as improved cooling effect. Furthermore, by installing a centrifugal fan on the large pulley, which rotates at a slow speed, it is possible to reduce the vibration of the large pulley caused by the resistance of the centrifugal fan to the air, and it is expected that this will have the effect of reducing the noise generated by the motor cooling device.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a cooking machine having the proposed structure;
FIG. 2 is a bottom view of the cooking machine shown in FIG. 1 with the back cover removed. 2... Motor, 7... Motor shaft, 9... Output shaft, 16... Belt, 14... Small pulley, 15
...Large pulley, 20...spokes, 5...base plate, 18...hanging wall.

Claims (1)

[Scope of utility model registration request] In devices that transmit the rotation of the motor from a small pulley attached to the motor shaft to a large pulley attached to the output shaft via a belt, the spokes of the large pulley on the output shaft side constitute a centrifugal fan for cooling the motor. A motor cooling device characterized in that a hanging wall integrally formed from a base plate supporting a motor and an output shaft surrounds the entire circumference or a part of the belt and guides cooling air into the inside of the motor.