JPS596743Y2 - cooking machine - Google Patents

Description

[Detailed Description of the Invention] 1a) Industrial Application Field The present invention relates to a cooking machine in which a cutter attachment is rotated by a drive shaft.

(B) Prior Art Conventionally, as shown in FIG. 4, a sleeve 12 that fits onto the drive shaft 8 protruding from the top surface of the base of the cooking machine and connects the drive shaft 8 with various cutter attachments has a D-shaped cross section. Therefore, when the drive shaft 8 rotates and the sleeve 12 rotates in the direction of the arrow, only one part C of the sleeve 12 comes into pressure contact with the inner peripheral surface of the boss part 18 of the cutter attachment, and force is intensively transmitted from this part. If a large force is locally applied to the boss portion 1B and a heavy load is applied, this portion may be destroyed.

In order to prevent this, it is conceivable to protrude a large number of protrusions 21 from the circumferential surface of the snowblade 12 as shown in FIG. 5, but this has the disadvantage that the boss portion 18 must be made thicker.

It is also possible to form the sleeve 12 into a polygonal shape as shown in FIG. 6, but if the wall thickness a at the corners is set to an appropriate thickness, the wall thickness b at other parts will be thinner and the strength will be weakened. If the wall thickness b of this portion is set to an appropriate value, the wall thickness a of the corner portion becomes large, which has the drawback that the boss portion 18 must also be made thicker.

(c) Purpose of the invention The present invention was developed in view of the shortcomings of the prior art as mentioned above. This prevents large forces from being applied.

(d) The structure of the invention is such that an outer shell is formed by a base with a motor mounted therein and a cooking container removably placed on the base, and the food is passed through an insertion hole drilled in the top surface of the base. A drive shaft with a partially flat circumferential surface on the tip side that passes through a cylindrical part bored in the center of the bottom of the cooking container is provided, and the drive shaft is fitted onto the drive shaft so that a part of its outer circumferential surface becomes the flat surface. A sleeve having a substantially cylindrical shape with substantially parallel surfaces and a longitudinal protrusion formed at the center of the parallel surfaces and whose lower end expands to cover the insertion hole; A cutter attachment is provided which is removably fitted into the fitting hole and has a groove formed in a part of the circumferential surface of the fitting hole into which the protrusion is fitted.

(e) Examples The present invention will be explained based on FIGS. 1 to 3. 1 is a cooking machine having a device of the present invention, a base 3 having a motor 2, etc. installed therein, and the base 3. A cooking container 4 is removably placed on top of the cooking container 3 to form an outer shell.

Reference numeral 5 denotes a plywood board installed in the base 3, and the base plate 5 integrally includes a half part 6 of the case of the motor 2, a bearing part 7 of the shaft of the motor 2, and a bearing part 9 of the drive shaft 8. It has an impressive shape.

The drive shaft 8 protrudes upward through an insertion hole 10 formed in the upper surface of the base 3, and a flat surface 11 is formed by cutting a portion of the circumferential surface of the protrusion of the drive shaft 8. The cross section is D-shaped.

Reference numeral 12 denotes a generally cylindrical sleeve made of plastic, which has flat portions 13 at several locations on its inner peripheral surface.When this sleeve 12 is fitted onto the drive shaft 8, each flat portion 13...
· is pressed against the outer circumferential surface of the drive shaft 8 to prevent the sleeve 12 from coming off.

The outer peripheral surface of this sleeve 12 has a surface 14 that is substantially parallel to the flat surface 11 of the drive shaft 8, and a vertical protrusion 15 is integrally formed in the center of the parallel surface 14. There is.

The lower end of the sleeve 12 is expanded to cover the insertion hole 10 of the drive shaft 8 to prevent liquid from entering the base 1 through the insertion hole 10.

On the other hand, the cooking container 4 has a cylindrical portion 16 extending from the center of the bottom surface thereof.
A drive shaft 8 with a sleeve 12 fitted therein passes through the cylindrical portion 16 when the cooking container 4 is mounted in a predetermined position.

Reference numeral 17 designates a cutter attachment, the central boss portion 18 of which is provided with a fitting hole 19 that fits into the sleeve 12.
A groove 20 is formed into which the protrusion 15 fits.

Therefore, when the motor 2 rotates and the drive shaft 8 rotates, the force is applied to the forceps attachment 1 through the sleeve 12.
Power is transmitted to the cutter attachment 17, and the cutter attachment 17 rotates.

The sleeve 12 has a flat surface 1 of the drive shaft 8.
Since the surface 14 parallel to 1 and the protrusion 15 are shaped,
When the sleeve 12 rotates, power is transmitted to the force vine attachment 17 mainly at two locations, one side edge A of the parallel surface 14 and one side B of the protrusion 15, that is, the force applied to the boss portion 18 is transmitted to the force vine attachment 17. Since the force is distributed at two locations, the boss portion 18 of the force vine attachment 17 will not be destroyed as would be the case if the force is applied concentratedly to only one location.

) Effects of the invention As explained above, the present invention has an outer shell formed by a base having a motor installed therein and a cooking container removably placed on the base, and a hole is formed on the top surface of the base. A drive shaft with a partially flat peripheral surface on the distal end side that passes through the insertion hole and into a cylindrical part protruding from the center of the bottom of the cooking container is provided, and the drive shaft is fitted onto the drive shaft and a part of the outer peripheral surface thereof is provided. a substantially cylindrical sleeve whose lower end is expanded to cover the insertion hole; Since the cutter attachment is provided with a boss portion that is removably fitted through the fitting hole and has a groove formed in a part of the circumferential surface of the fitting hole into which the protrusion is fitted, the cutter attachment There is no need to make the boss portion thicker, and since the protrusion is not directly attached to the metal drive shaft but is instead provided on the resin sleeve, processing is not difficult.

In addition, if flat parts are formed at multiple locations on the inner peripheral surface of the sleeve as in the embodiment, and these flat parts are crimped onto the outer peripheral surface of the drive shaft, even if there is a slight dimensional difference in the inner diameter of the sleeve, This sleeve can be crimp-fitted to the drive shaft, and it is neither too loose and easily dislodged, nor too tight that it cannot be fitted, making it an excellent method of reliably transmitting rotational drive from the drive shaft to the cutter attachment. It becomes an opportunity.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of a cooking machine according to an embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view of the main part near the sleeve, and Fig. 3 is a longitudinal cross-sectional view of a cooking machine according to an embodiment of the present invention.
The II-II sectional view, FIGS. 4, 5, and 6 are conventional examples corresponding to FIG. 3 shown for comparison with the present invention. 2...Motor, 1...Base, 4...Cooking container, 1
0... Insertion hole, 16... Cylindrical part, 11... Flat surface, 8... Drive shaft, 14... Parallel surface, 15... Projection, 12... Sleeve, 19... Fitting hole, 20...
・Groove, 18...Boss part, 17...Cut attachment.

Claims (1)

[Scope of utility model registration request] (1) A base with a motor installed inside and a cooking container removably placed on the base form an outer shell, and the bottom surface of the cooking container is inserted through an insertion hole drilled in the top surface of the base. A drive shaft is provided that passes through a cylindrical part protruding from the center and has a partially flat circumferential surface on the distal end side, and is fitted onto the drive shaft so that a part of its outer circumferential surface is substantially parallel to the flat surface. and a substantially cylindrical sleeve with a longitudinal protrusion formed at the center of the parallel surfaces and whose lower end expands to cover the insertion hole, and a sleeve that is detachably attached to the sleeve through the fitting hole. 1. A cooking machine provided with a cutter attachment having a boss portion that fits into the fitting hole and has a groove in which the protrusion fits into a part of the circumferential surface of the fitting hole. :2) The inner peripheral surface of the sleeve has a plurality of flat parts,
The cooking machine according to claim 1, wherein the flat portion is pressed against the outer circumferential surface of the drive shaft.