JPS6030858A - Rotary transmission system - Google Patents

Abstract

PURPOSE:To facilitate exchange of clutch by providing a clutch between a drive and inverted gears while energizing to the drive gear side then providing projections on the facing faces of said clutch and drive gear while forming an inclined face on one projection. CONSTITUTION:A clutch 18 is provided between a drive gear 16 and an inverted gear 17 while being energized by a compression coil spring 23 to the drive gear side 16 then projections 19, 21 are provided on the facing facies of the clutch 18 and the drive gear 16 and an inclined face 20 is formed on one of said projections 19, 21. Consequently, during stoppage of motor, the clutch 18 is separated from the inverted gear 17 to prevent transmission of rotation from the side to be driven to the motor. Consequently, safety is assured while exchange of clutch 18 is performed automatically by the inclined face 20 to facilitate exchange.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a conventional structure of a small electrical appliance such as a rotary cooker and its problems. As shown in the figure, a motor 2 is provided inside the main body 1, and the rotation of the motor 2 is controlled by a pinion 3. Intermediate gears 4, 5. The signal is transmitted to an output shaft 7 via a driven gear 6, and the output shaft 7 is configured to rotate a cone 8 provided at the upper part of the main body 1.

Note that 8' in the figure represents a container, and 9 represents a power plug.

Since this type of equipment is small, the motor 2, which is the drive source, has a simple structure and small size as shown in Fig. 2.
A small permanent magnet rotor type synchronous motor, which is inexpensive, is used. This small permanent magnet rotor type synchronous motor consists of a stator 1Q, a drive coil 11 mounted on the stator 10, and a permanent magnet rotor 13 rotatably provided at magnetic pole portions 12.12.

As is well known, in this small permanent magnet rotor type synchronous motor, the magnetic pole portion 12 is
．． 12 generates an alternating magnetic field, and there is a permanent power supply glove 9.
Remove the flexible magnet rotor 1 from the power outlet, etc.
When rotated, it functions as a generator. Therefore, for example, when the aforementioned cone 8 is turned by hand, the driven gears, intermediate gears 4, 6, . The speed is increased through the pinion 3 to rotate the permanent magnet rotor 13, and a high voltage is applied to the power plug 9 due to power generation. Therefore, there are 12 terms in which if you touch the power supply glove 9, you will receive an electric shock.

Possible countermeasures for this reversal of the motor include a method of interposing a relay between the power supply (III) and the drive coil 11, and a method of interposing a worm gear in the tooth row.However, the former method of using a relay is expensive. On the other hand, in the latter method using a worm gear, the helical winding angle of one worm gear must be made close to about 404" to completely prevent slippage, and when such a worm gear is used, the gear transmission efficiency is 1.
When the temperature deteriorates to 44 degrees, the problem arises that an increase in motor capacity is required, making it impossible to provide small and inexpensive products.

OBJECTS OF THE INVENTION The present invention has been made in consideration of the above-mentioned conventional problems, and an object of the present invention is to provide an inexpensive rotation transmission device that has a simple structure for disabling the rotation of the motor due to the rotation of the driven side. .

Structure of the Invention In order to achieve the above object, the present invention provides a clutch that is slidable in the axial direction between a drive gear and a driven gear that are rotatably provided on the same axis, and a compression coil spring is used to connect the clutch to the drive gear side using a compression coil spring. providing projections that engage with each other on opposing surfaces of the driving gear and the clutch, and forming an inclined surface for sliding guide at the base of one of the projections that engages with the pressure; The rotation transmission device is configured such that when the driving gear rotates, the corresponding protrusion slides on the inclined surface, thereby sliding the clutch toward the driven gear, thereby coupling the clutch and the driven gear to each other. It is. According to this configuration, when the driving gear side, that is, the motor, is not rotating, the clutch is separated from the driven gear, and it is possible to prevent rotation from the driven gear side from being transmitted to the motor. There are no accidents caused by power generation, the rotation transmission system is configured only when the motor is driven13, it is convenient to handle, and the clutches are switched automatically by devising the shape of the protrusions that engage with each other. , which has the advantage of being simple in structure.

Description of an Actual Gun Example An embodiment of the present invention will be described below with reference to FIGS. 3 to 7.

In the figure, 14 is a gear pivot shaft, with bosses 16 at both ends.
16, and a drive gear 16 and a driven gear 17 are fitted together to support them rotatably.

Further, a clutch 18 is provided between the driving gear 16 and the driven gear 17 so as to be slidable in the axial direction. The drive gear 16 meshes with a pinion (not shown) on the motor side, and the driven gear 17 meshes with a gear (not shown) on the drive side.

The drive gear 16 has a projection 19 on its upper surface, that is, the surface corresponding to the clutch 18, and this projection 19 has a. The clutch 18 has protrusions 21 and 22 on both sides, that is, on the surfaces corresponding to the driving gear 16 and the driven gear 17, respectively.
have. Furthermore, this clutch 18 is biased toward the driving gear 16 by a compression coil spring 23, and its four parts 18' are fitted into knurls 24 provided on the gear pivot shaft 14. Clutch 1 of the driven gear 17
The surface corresponding to 8 has a protrusion 26.

When the motor is stopped (section 31), the compression coil spring 23 maintains a gap A between the protrusion 22 of the clutch 18 and the protrusion 26 of the driven gear 17.

In the above configuration, when the motor is stopped, the third
In the state shown in the figure, the clutch 18 is pushed down by the compression coil spring 23 and disengaged from the upper driven gear 17. Therefore, even if the rotating member of the driven part 111 is rotated, the driven gear 17 will idle, and since the rotation and rotation of the gear 18 will not be affected, the motor will not rotate and no power will be generated. -Ash, -r
It is safe because lightning pressure is not applied to +8. In this state, since the clutch 18 is moving downward, the recess 18' at the bottom of the clutch 18 is engaged with the knurling 24, and even if the clutch 18 receives rotational force for some reason, its rotation will be prevented. is stopped.

Next, when the motor is rotated, the drive gear 16 rotates.

The protrusion 21 of the clutch 18, which is in contact with the upper surface of the drive gear 16 as shown in FIG. 6, runs over the inclined surface 20 of the base of the protrusion 190 due to the rotation of the drive gear 16 in the B direction, as shown in FIG. That is, the clutch 18 is slid in both directions by a height D, and the protrusion 20.2
1 is relevant. By sliding the clutch 18 upward, the upper protrusion 22 of the clutch 18 engages with the protrusion 25 of the driven gear 17, as shown in FIG. Therefore, the rotation of the motor is controlled by the drive gear 16. Clutch 18° Driven gear 17
The signal is transmitted to the required driven part via. At this time, due to the upward movement of the clutch 18, the concave portion 18' is
4, the clutch 18 can rotate.

Effects of the Invention As is clear from the description of the embodiments described above, according to the present invention, when the motor is stopped, the clutch automatically cuts off the rotation transmission path, and even if the rotated part is manually operated, the motor does not rotate, and the motor does not rotate. No voltage is applied to the power plug due to power generation, ensuring safety. Further, the clutch is automatically switched to form a rotation transmission system for motor operation, etc., and manual operation is not required for the switching. Furthermore, since the clutch is switched by an inclined surface at the engagement portion between the drive gear and the clutch protrusion, the structure is simple and the disadvantages of using a relay or worm as described in the conventional example are eliminated. The effect is significant.

Note that the inclined surface formed on the protrusion of the drive gear may be formed on the corresponding protrusion side of the clutch.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an orange squeezer having a conventional rotation transmission device, FIG. 2 is a plan view of a driving motor thereof, and FIG. 3 is a cross-sectional view of a rotation transmission device according to an embodiment of the present invention. Figure 4 is a sectional view of the rotation transmission device during rotation transmission, Figure 6 is a sectional view of main parts showing the relationship between the driven gear and the clutch, and Figures 6 and 7.
The figure is a sectional view showing the relationship between the clutch and the drive gear. 14... Gear pivot shaft, 16... Driving gear, 17... Driven gear, 18... Clutch, 19, 21° 22...・Protrusion, 23...
・Compression coil spring. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 5 Ia 8! Il! +'iFigure 6 Figure 7

Claims (1)

[Claims] If a latch is provided that is slidable in the axial direction between a drive gear and a driven gear that are rotatably provided on a gear pivot shaft, the clutch is biased toward the drive gear by a compression coil spring, and the drive gear is Protrusions that engage with each other are provided on the corresponding surfaces of the gear and the clutch, and protrusions are also provided on the corresponding surfaces of the clutch and the driven gear, and either one of the protrusions on the driving gear and the protrusion on the clutch is provided. A rotation mechanism in which a sloped surface for guiding a slide is formed on the base, and when the driving gear rotates, the clutch is slid through the corresponding projection by the sloped surface, and the clutch is engaged with the projection of the driven gear. transmission device.