JPS5920854Y2 - Rotor mounting device - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to motor-applied equipment, particularly to a mounting device for a cooking rotor such as a removable cutter attachment that rotates inside the cooking container of a cooking machine. be.

(B) Prior art A conventional rotor mounting device prior to the present invention, as disclosed in Japanese Utility Model Publication No. 50-22197, provided a groove into which a protrusion of the drive shaft fits into the shaft hole of the rotor. A contact portion is formed that is inclined toward the rotational direction of the drive shaft toward the inner part of the hole, and continuously applies a downward force to the rotor while the drive shaft is rotating.

However, in the above-mentioned conventional example, the width of the groove increases as it goes deeper into the shaft hole, and when the drive shaft is stopped, the rotor rotates in the opposite direction with respect to the drive shaft, and the protrusion separates from the contact part, and the rotor no longer lowers. There was a risk that it would not be able to receive the directional force and that it would be pulled out suddenly.

(c) Purpose of the invention The present invention was developed in view of the problems of the prior art as described above. When attaching a rotating member to a drive shaft, the rotating member can be reliably mounted with a simple structure without using screws or the like. It is an object of the present invention to provide a mounting device that can be mounted on a drive shaft and that prevents the rotating member from being easily pulled out during the rotation of the long drive shaft or when it is stopped.

(d) Structure of the invention A rotor is formed in which a narrow diameter part is formed at the tip of the drive shaft via a stepped part, and a protrusion for power transmission is formed on the circumferential surface of the narrow diameter part, and the rotor is fitted to the drive shaft. The shaft hole is formed with a retaining protrusion that is inserted and held between the power transmitting protrusion and the stepped portion, and the power transmitting protrusion is formed in the shape of a long rib in the axial direction. and is formed so that the distance from the stepped portion increases in the direction of rotation of the drive shaft, and is inserted between the drive transmitting projection of the engagement protrusion and the stepped portion. By forming the side in a wedge shape, the rotor can be attached and detached, and the rotor is reliably prevented from coming off while the tool part moving shaft is rotating and when it is stopped.

(E) Example Hereinafter, an example in which the present invention is used in a cooking machine that cuts cooking ingredients by rotating a vine device inside a cylindrical container with a bottom will be described with reference to the drawings.

1 is a cooking machine equipped with the mounting device of the present invention, with the -half part raised high;
It is composed of a base 2 with a low groin portion and a bottomed cylindrical container 3 removably placed on the base 2.

A motor 4 is housed in the high half of the base 2, and a drive shaft 5 is projected from the upper surface of the low half.

A large pulley 8 is attached to the lower end of the motor shaft 6 of the motor 4, and the rotational force of the motor 4 is transmitted to the drive shaft 5 by connecting both pulleys 7.8 with a belt 9.

A push button switch 10 for controlling the motor 4 and an electrical component mounting part 12 for mounting a safety switch and the like controlled by the attachment of the lid 11 of the container 3 are provided on the upper surface of the high half of the base 2. It is shaped.

Reference numeral 13 denotes a cover of the mounting portion 12 in which a protruding hole 14 for the operation portion of the switch 10 is formed,
A boss 16, 16 is provided vertically for holding down the mounting plate 15 of the switch 10, and for mounting a seesaw switch or the like of a different standard in place of the switch 10.

Reference numeral 17 denotes a synthetic resin sleeve that is press-fitted onto the portion of the drive shaft 5 that protrudes from the base 2.

A narrow diameter portion 19 is provided at the tip of the sleeve 17 via a stepped portion 18.
At the same time, power transmission protrusions 20 and 20 are formed at symmetrical positions on the circumferential surface of the narrow diameter portion 19.

The protrusions 20, 20 are shaped like knobs that are long in the axial direction, and are shaped so that the distance between the step portion 18 and the protrusions 20, 20 widens in the direction of rotation of the drive shaft 50, as indicated by the arrow in the figure. It is set up.

The lower end of the sleeve 17 is expanded to cover the insertion hole 21 of the drive shaft 5 on the upper surface of the base 2, thereby preventing liquid from entering the base 2 through this portion.

On the other hand, the container 3 has a cylindrical portion 22 integrally projecting from the center of its bottom surface, and when the container 3 is installed in a predetermined position, the drive shaft 5 with the sleeve 17 fitted inside the cylindrical portion 22 The upper half 17a of the sleeve 17
protrudes into the container 3 from the cylindrical portion 22 .

23 is a cutter attachment as a rotor that rotates within the container 3, and its central boss portion 24 is connected to the sleeve 1.
an upper boss portion 24a protrudingly provided with a fitting hole 25 as a shaft hole that fits into the upper half portion 17H of 7; and a lower boss portion that covers the outside of the cylindrical portion 22 with a slight gap. 24b and more.

A cutter attachment portion 26 extends from the lower end of the lower boss portion 24b, and a cutter blade 27.2 is provided on the upper and lower surfaces of the attachment portion 26.
7 is attached and fixed by pins 28, and the double-sided vine blades 27, 27 are made to protrude in the horizontal direction.

A stepped portion 18 of the sleeve 17 is provided on the circumferential surface of the fitting hole 25.
The power transmission protrusion 20 and the stepped portion 18
A locking protrusion 29, 29 is formed to be inserted between the two.

The locking protrusion 29.29 is connected to the power transmission protrusion 20.
The side that is sandwiched between the step portion 18 and the step portion 18 is wedge-shaped, and the side that comes into contact with the step portion 18 is wedge-shaped.

Next, the transmission of power from the drive shaft 5 to the attachment 23 will be explained.

The rotational power of the drive shaft 5 is transmitted through the sleeve 17.

When the attachment 23 is attached to the sleeve 17, the engagement protrusion 29 comes into contact with the stepped portion 18.

Therefore, the attachment 1-23 is held with an appropriate gap between the cutter blade 27 and the bottom surface of the container 3.

Thereafter, when the attachment 23 is turned in the direction opposite to the arrow in the figure, the engagement protrusion 29 moves from the widest to the narrowest distance between the power transmission protrusion 20 and the stepped portion 18,
The engagement protrusion 29 is pushed forward while being slightly deformed upward and is clamped, and is securely fixed by the elastic return force of the engagement protrusion 29.

Therefore, the attachment 23 will not come off even if it is pulled up in this state.

After attaching the attachment 23 to the sleeve 17 in this way, when the switch 10 is closed and the motor 4 is rotated,
The drive shaft 5 and thus the sleeve 17 rotate in the direction of the arrow in the figure.

At this time, the attachment 23 receives a force in the direction of preventing its rotation due to its own gravity and the material inside the container 3, so the retaining protrusion 29 is even stronger between the drive transmission protrusion 20 and the stepped portion 18. Since the protrusion 20 is deformed upward and pushed forward, the elastic restoring force against the amount of deformation is also large and the sleeve 17 is clamped more firmly, thereby strengthening the connection between the attachment 23 and the sleeve 17, which prevents the attachment 23 from rattling or floating during operation. There's nothing to do.

Further, in this embodiment, the side of the engagement protrusion 29 that is inserted into the engagement protrusion 29 and the side that abuts the step part 18 are wedge-shaped, and the distance between the power transmission protrusion 20 and the step part 18 is adjusted to 29 is narrowed in the direction in which it is inserted, the retaining protrusion 29 is strongly sandwiched by the wedge action between its own flat surface and the flat part of the drive transmission protrusion 20, and strongly abuts against the step 18. The bond becomes even stronger.

In addition, the upper half 1 of the sleeve 17 protruding from the cylindrical portion 22 of the container 3 connects the attachment 23 and the sleeve 17.
Since the lower half 17b of the sleeve 17 located inside the cylindrical part 22 is not involved in the connection, the cylindrical part 2
Since the distance between the container 2 and the sleeve 17 can be reduced, and the boss portion 24 can be made thinner, the cooking capacity of the container 3 can be increased.

In addition, the lower boss portion 24 b of the attachment 23 and the container 3
Even if cuttings get into the space between the cylindrical portions 22 during cooking, the lower boss portion 24b into which the cuttings have entered is a large-diameter hole, making it easy to clean after cooking.

(f) Effects of the invention As described above, the present invention forms a small diameter portion at the tip of the drive shaft via a step, and also forms a protrusion for power transmission on the circumferential surface of the narrow diameter portion. The shaft hole of the rotor that fits into the shaft is formed with a retaining protrusion that is inserted and held between the power transmitting protrusion and the step, wherein the power transmitting protrusion is formed in the shape of a long rib in the axial direction, and is formed so that the distance from the stepped portion increases in the rotational direction of the drive shaft, and the drive transmitting protrusion and the stepped portion of the engagement protrusion By forming the wedge-shaped side that is sandwiched between them, the engaging protrusion moves to fit between the drive transmission protrusion and the step part during rotation, and the engagement between both protrusions is firmly maintained and rotation is achieved. Power is reliably transmitted to the rotor without the child floating up.

Furthermore, when the drive shaft is stopped, the engagement between the two protrusions is maintained with almost no loosening, and the engagement between the two protrusions is released only by manually rotating the rotor in the detachment direction, so the drive shaft can be stopped. An extremely safe mounting device can be obtained without the rotor coming out even immediately after installation, which has a great practical effect.

[Brief explanation of drawings]

Figure 1 is a sectional view of a cooking machine equipped with the device of the present invention, Figure 2 is a sectional view of the device of the present invention, Figures 3 and 4 are partial side views of the drive shaft viewed from different directions, and Figure 5. 2 is a cross-sectional view taken along the line AA in FIG. 2, showing the connected state of the device of the present invention. 17... Sleeve (drive shaft) 18...
Stepped part, 19... Thin diameter part, 20.20...
・Protrusion for drive transmission, 23... Attachment (
rotor), 25... Fitting hole (shaft hole), 29.2
9... Engaging protrusion.

Claims (1)

[Scope of utility model registration request] A narrow diameter portion is formed at the tip of the drive shaft through a stepped portion, and a power transmission protrusion is formed on the circumferential surface of the narrow diameter portion, and the shaft hole of the rotor that fits into the drive shaft is provided with the A locking protrusion is formed between the power transmission protrusion and the stepped portion, and the power transmitting protrusion is formed in the shape of a long rib in the axial direction, and The engagement protrusion is formed so that the distance from the drive shaft increases in the direction of rotation of the drive shaft, and the side of the engagement protrusion that is inserted between the drive transmission protrusion and the stepped part is wedge-shaped. A rotor mounting device featuring: