JPH0340749A - Low-speed rotating device - Google Patents

Abstract

PURPOSE:To simplify the structure of the title device and facilitate the manufacture of the same by a method wherein a plurality of electromagnets are arranged along the circumferential direction of a conical stator so as to form several rows and an elastically deformable rotator is arranged concentrically in the fixed body while the rotator is provided with an electromagnetic attraction member. CONSTITUTION:The title device is constituted so that a rotator 12 is made of a thin magnetic plate 13 coated by a flexible synthetic resin material through laminate process and electromagnets 7, fixed to the inner circumferential surface of a fixed housing 2, are electrified or the electrification of the same is stopped whereby only the rotating body 12 is deflected with an output shaft 16 kept vertical. According to this method, when the rotating body 12 is rotated based on a difference between the radius (r2) of a conical surface (c) constituted of the cores 8 of the electromagnets 7 and the radius (r1) of the rotator 12, the output shaft 16 will never be inclined toward the electromagnets 7 which are conducted and is retained on a given center line 0-0 at all times. Accordingly, the output shaft 16 can be supported by bearings 4, 6 which are used usually whereby the structure of a motor 1 may be simplified.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a low speed rotating device.

[Prior Art] Generally, as a low-speed rotating device, there is one shown in FIG. 4, for example. This motor has a cone-shaped housing 21 made of a non-magnetic material fixedly arranged therein, and
A rotor 22 made of a magnetic material and having a diameter smaller than that of the housing 21 is disposed within the housing 21 and is rotatably supported in the circumferential direction by an output shaft 26 integral with the rotor 22 . In a magnetic seal case 27 provided on the outer peripheral surface of the housing 21, electromagnets 25 each having a coil wire 24 wound around an iron core 23 are arranged in a row in the circumferential direction, and the electromagnets 25 are sequentially energized. , a part of the circumferential surface of the rotor 22 is successively attracted to the electromagnet 25 side, and the rotor 22 rotates while the circumferential surface of the rotor 22 contacts the housing 21 .

At this time, the radius of the rotor 22 is rl, and the same rotor.

22 is in surface contact with the housing 21 and the distance from its outer end to the center is r2, the amount of rotation of the output shaft 26 of the rotor 22 when the electromagnets 25 arranged in a row in the housing 21 complete one cycle is ((r2 -ri)/rt) ・
It is expressed in 360 degrees. Therefore, the output shaft 26 can be rotated once at a very low speed.

[Problems to be Solved by the Invention] However, the rotor 22 rotates along a conical path defined by the inner peripheral surface of the housing 21 according to the order of energization of the electromagnets 25, and its rotational posture is shows blurring as shown by the two-dot chain line.

Along with this, the rotation axis is also displaced, and the output shaft 26 does not always rotate coaxially, but instead rotates in an oblique posture as shown by the two-dot chain line.

Therefore, in order to allow the attitude of the output shaft 26 to change during rotation, it is necessary to support the base end of the output shaft 26 with a special ball bearing 28 as shown in FIG. 5, which complicates the structure and makes manufacturing difficult. This becomes complicated and causes a rise in manufacturing costs.

This invention was made in order to solve the above-mentioned problems, and its purpose is to have a simple structure and easy manufacture without requiring any special members, thereby reducing manufacturing costs. The purpose of the present invention is to provide a low-speed rotating device.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes a plurality of electromagnets arranged in a row in the entire circumferential direction of a funnel-shaped fixed body, and a plurality of electromagnets with a smaller diameter than the funnel-shaped fixed body. The gist is that a funnel-shaped elastically deformable rotating body is arranged coaxially with a fixed body, and that the rotating body is provided with suction members that are attracted by electromagnets all over the circumference.

[Operation] By employing the above-described means, the present invention employs the above-mentioned means, so that when the electromagnets are sequentially energized, the rotating body is deformed to the side of the electromagnet and rotates while contacting the inner circumferential surface of the fixed housing, thereby producing an output that rotates together with the rotating body. The axes rotate on the same center line.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 to 3.

In FIG. 1, a fixed housing 2 as a fixed body of a motor 1 is formed of a non-magnetic material into a funnel shape, and its upper part is closed with a disc-shaped lid 3, and a cylinder is provided in the center of the lid 3. An upper bearing 4 is formed by fitting the shaped body. A cylindrical body having the same diameter as the upper bearing 4 is fitted in the horizontal bottom portion 5a of the fixed housing 2 at its center so as to correspond to the upper bearing 4, thereby forming a lower bearing 6.

As shown in FIG. 2, on the inner surface of the oblique bottom portion 5b of the fixed housing 2, a plurality of electromagnets 7 are arranged in rows on the circumference of each inner and outer row concentric with the lower bearing 6. The electromagnet 7 is constructed by winding a coil wire 9 around an iron core 8, and a lead wire 10 extending from the coil wire 9 is connected to an external power source through a lead-out hole 11 provided in the slanted bottom portion 5. electromagnet 7
are turned on and off sequentially in a clockwise direction.

As shown in FIG. 1, inside the fixed housing 2 is a rotating body 12 having a funnel shape with a smaller diameter and a larger opening.
is arranged on the same center line O-0 as the fixed housing 2. The rotating body 12 is formed by laminating a funnel-shaped magnetic plate 13 of high magnetic flux density such as an amorphous alloy with a highly flexible synthetic resin such as 6-6 nylon in a bottom shape. The upper part of the rotating body 12 is opened, and the magnetic plate 13 is exposed on the inner surface of the oblique part 14.

Furthermore, a fixing hole 15 formed at the center of the bottom of the rotating body 12
An output shaft 16 having a smaller diameter than the inner diameter of the upper and lower bearings 4.6 is fitted into the upper and lower bearings 4.6, and this output shaft 16 extends vertically upwardly and downwardly through the bearings 4.6. is rotatably supported by well-known bearings 4 and 6 in a vertical state at all times.

The electromagnets 7 are sequentially energized in the circumferential direction (for example, from electromagnet E7a to electromagnet 7b), and when the energized electromagnet 7 is stopped, the adjacent electromagnet 7 is energized.

Now, the operation of the low-speed rotating device configured as described above will be explained below.

Now, when the electromagnet 7a of the fixed housing 2 is energized, a magnetic circuit is formed between the magnetic plate 13 of the rotating body 12 and the iron core 8 of the electromagnet 7a, and the magnetic plate 13 is attracted to the electromagnet 7a. Therefore, as shown by the two-dot chain line in FIG. 1, the part of the oblique bottom 5 of the rotating body 12 that corresponds to the electromagnet 7a is bent, and its outer surface comes into contact with the iron core 8 of the electromagnet 7a of the fixed housing 2. .

Next, immediately before stopping the energization of the electromagnet 7a, the electromagnet 7 adjacent to the electromagnet 7a in the clockwise direction is energized, and the corresponding portion of the rotating body 12 is bent until it comes into contact with the iron core 8 of the electromagnet 7. In this way, by sequentially energizing and de-energizing from the electromagnet 7a to the electromagnet 7b,
The oblique portion 14 of the rotating body 12 is bent in the clockwise direction in FIG. 2 and comes into contact with the electromagnet 7.

That is, the outer circumferential surface of the oblique portion 14 of the rotating body 12 sequentially contacts the iron cores 8 of the electromagnets 7a to 7b arranged clockwise at )Q. Therefore, as shown in FIG. 3, the maximum radius of the inclined portion 14 of the rotating body 12 is rl, the maximum radius of the inclined portion when in surface contact with the iron core 8 of the electromagnet 7 is r2, and the conical surface C The upper surface is sequentially contacted in the entire circumferential direction. Therefore, by energizing and de-energizing the electromagnets 7a to 7b, the rotating body 12 rotates by C(r2-rt)/rl) ・360°-α in the circumferential direction, and the output shaft accordingly rotates. 16
will also rotate by α°.

By repeating this, the output shaft 16 continues to rotate at a low speed, and the driven side equipment is rotated at a low speed via the output shaft 16.

As described above, in this embodiment, the rotating body 12 is made of a thin magnetic plate 13 made of a flexible synthetic resin material, and the electromagnet 7 fixed to the inner peripheral surface of the fixed housing 2 is energized and de-energized. As a result, only the rotating body 12 is bent while the output shaft 16 is held vertically. As a result, a conical surface C formed by the iron core 8 of the electromagnet 7
When the rotating body 12 rotates based on the difference between the radius r2 of Retained. Therefore, the output shaft 16 only needs to be supported by the normally used bearings 4 and 6, and the structure of the motor 1 can be simplified.

Note that the present invention is not limited to the embodiments described above, and for example, (1) the rotating body 12 is formed in a synthetic resin material with a t-sized porcelain powder, or (2) the rotating body 12 is made of a magnetic material that can be elastically deformed. form in the body, etc.
Any changes can of course be made without departing from the spirit of the invention.

[Effect 1] As described in detail above, the present invention exhibits an excellent effect in that it does not require special members, has a simple structure, is easy to manufacture, and can reduce manufacturing costs.

[Brief explanation of drawings]

FIG. 1 is a side sectional view embodying the low-speed rotation device of the present invention, FIG. 2 is a plan sectional view taken along line nn in FIG. 1, and FIG. 3 is a principle diagram showing the rotational operation of the output shaft. FIG. 4 is a sectional side view showing a conventional low-speed rotating device, and FIG. 5 is a schematic side view showing the structure of a conventional bearing.

Claims (1)

[Claims] 1. A plurality of electromagnets are arranged in a row along the circumferential direction of a fixed body having a funnel shape, and an elastically deformable rotating body having a smaller diameter and having a funnel shape is arranged coaxially with the fixed body, A low-speed rotating device comprising a suction member that is attracted to the rotary body by an electromagnet in the entire circumferential direction.