JPS5939626B2 - Drum that can change outer diameter while rotating - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drum whose outer diameter can be changed while rotating.

If the outer diameter or circumferential length of a drum changes, the number of rotations and rotational speeds of other drums in contact with that drum will change.

However, such adjustment requires that the rotation of the drum be stopped and replaced with a drum of a different diameter.

In such a case, the present invention enables the outer diameter and circumferential length of the drum to be expanded or contracted without stopping the rotation of the drum.

Next, Example E will be explained.

<A> Divided torus The divided torus 1, which is obtained by dividing a donut-shaped torus into a plurality of parts along the vertical radiation plane from the center, is a member having arcuate surfaces inside and outside. When brought into contact, one circular ring is completed, and at that time, the group of 12 outer curved surfaces forms a drum.

The inner arcuate surface 13 of the split ring 1 is inclined upward with respect to the central vertical axis of the ring, and a vertical groove 14 is vertically recessed in the center thereof.

Further, the upper part of the divided ring 1 has an upper slope 15, and the lower part has a lower slope 1.
form 6.

Both the upper and lower slopes 15 and 16 are slopes that intersect with the outer curved surface 12 at obtuse angles.

<Mouth> The cylindrical inverted conical tube 2, in which the diameter of the upper surface 21 of the inverted conical tube is larger than the diameter of the lower surface 22, is formed as an oblique peripheral surface 23 whose circumferential surface is inverted.

Guide plates 24 are provided perpendicularly to the oblique circumferential surface 23 in a number corresponding to the number of divided rings 1.

This guide plate 24 fits into the vertical groove 14 of the split ring 1.

<C> Focusing ring 3 is pressed from above the group of divided rings in order to focus the group of divided rings, each of which is in a separate state, to form one ring.

The focusing ring 3 has an inwardly directed inner slope 32 formed on the lower surface of the ring wire 31 that overlaps its periphery, and has a through hole 33 in the center that passes through a threaded cylinder 5, which will be described later.

This inner slope 32 contacts the upper slope 15 of the divided ring 1, applies pressure from above, and acts to focus the divided ring 1 group.

<2> Saucer The first group of divided rings is placed on the upper surface of the saucer 4.

The saucer 4 has an inwardly directed inner slope 41 formed at the periphery of its upper surface, and receives the lower slope 15 of the split ring 1 at the inner slope 41.

In the center of the saucer 4, there is a support hole 42 for inserting the rotating cylinder 6, which will be described later.
will be established.

<E> The threaded cylinder 5 with the thread 51 formed on the inner surface of the threaded cylinder has a flange 52 on its upper part.
is located above the focusing ring 3.

A spring 53 is interposed between the lower surface of the collar 52 and the upper surface of the focusing ring 3.

<To> Rotating cylinder The hollow rotating cylinder 6 that is rotationally driven has a threaded portion 61 on its upper part, and engages with the screw 51 of the threaded cylinder 5.

The saucer 4 is fixed to the rotary cylinder 6 via a key 43 or the like.

The inverted conical cylinder 2 has a vertical groove 25 on the inner surface of the slide hole 26 in the center.
A vertical guide key 62 protruding from the rotary cylinder 6 is fitted into the rotary cylinder 6.
Attaches so that it can slide freely only in the vertical direction.

At this time, a push-up spring 44 is interposed between the lower surface of the inverted conical tube 2 and the upper surface of the saucer 4, so that an upward force is constantly applied to the inverted conical tube 2.

Furthermore, a drum drive gear 63 is fixed to the lower end of the rotary cylinder 6.

Therefore, the drum portion is always rotating as long as the drum drive gear 63 is rotating.

<G> Center axis A central shaft 7 is provided passing through the hollow part of the rotary cylinder 6.

The upper part of the central shaft 7 is exposed above the rotary cylinder 6, and a flange plate 71 is fixedly protruded from the exposed part.

Then, the flange plate 71 and the flange 52 of the threaded cylinder 5 are fixed with vertical bolts 54.

On the other hand, below the central shaft 7, two diameter adjusting gears and three electromagnetic clutches are attached.

The two gears, namely the diameter enlarging gear 72 and the diameter reducing gear 73, are loosely fitted around the central shaft 7 so as to be freely rotatable.

The configuration of each gear 72, 73 will be described later.

The electromagnetic clutch has a friction plate that is slidable only in the axial direction on the central shaft 7 and cannot be rotated in the circumferential direction, and when a signal is input, the friction plate is slid in the axial direction on the central shaft 7 by an electromagnet. , is a known clutch that transmits and releases the rotation of the gear to the central shaft 7.

:) The constant velocity rotation transmission clutch rotary cylinder 6 is constantly rotated by the rotation of the drum rotation gear 63.

A constant velocity rotation transmission clutch 74 transmits and releases rotation at the same speed as this rotation to the central shaft 7.

ii) High-speed rotation transmission clutch The high-speed rotation transmission clutch 75 transmits or releases rotation to the central shaft 7 that is faster than the rotation speed of the rotary tube 6 that rotates at a constant speed.

This clutch 75 has a structure in which when it comes into contact with the diameter expanding gear 72 freely rotating on the center shaft 7, it transmits the rotation of the gear 72 to the center shaft 7, and when it separates, it cancels the transmission.

111) Low-speed rotation transmission clutch The low-speed rotation transmission clutch 76 transmits and releases rotation to the central shaft 7 at a slower rate than the rotational speed of the rotating tube 6 which rotates at a constant speed.

. This clutch 76 is structured to transmit the rotation of the gear 73 to the center shaft 7 when it comes into contact with the diameter reducing gear 73 freely rotating on the center shaft 7, and to release it when it is separated.

A drive shaft 8 connected to a drive shaft motor is located parallel to the central shaft 7, and fixes three gears.

i) Equal number gear The equal number gear 81 is a gear that meshes with the drum drive gear 63, and the number of teeth is equal to the number of teeth of the drum drive gear 63.

For example, if the drum drive gear 63 has 100 teeth, the equal number gear 81 also has 100 teeth.

11) Addend gear The addend gear 82 meshes with the diameter expansion gear 72, and the number of teeth (
For example, 101 teeth) is greater than the number of teeth of the diameter enlarging gear 72 (for example, 99 teeth) and the number of teeth of the equal number gear 81 (100 teeth).

111) Reduction gear The reduction gear 83 meshes with the diameter reduction gear 73, and the number of teeth (
For example, 99 pieces) is the number of diameter reduction gears 73 (for example, 101 pieces).
(100 pieces) than the number of equal gears 81 (100 pieces).

Next, the operation will be explained.

First of all, as long as the drive shaft 8 is rotating, the number of gears 8 is equal.
1. The drum portion, such as the divided ring 1, continues to rotate at a constant speed via the drum drive gear 63.

The diameter of the drum increases or decreases depending on whether the central shaft 7 is rotated faster or slower than this rotation speed.

<A> The normal rotation constant velocity rotation transmission clutch 74 is in contact with the drum drive gear 63, and the other clutches 75 and 76 are in the released state.

Then, the same rotation as the equal number gear 81 is given to the central shaft 7, and there is no change in the drum portion.

<Opening> Only the diameter expansion high-speed rotation transmission clutch 75 is brought into contact with the diameter expansion gear 72, and the other clutches 74 and 76 are released.

Then, the rotation of the addend gear 82 is transmitted to the central shaft 7, and the central shaft 7 rotates at a slightly higher speed than the rotary cylinder 6 which is rotating at a constant speed.

Then, the screw tube 5 rotates and descends via the collar plate 71, and the lower end of the screw tube 5 pushes down the upper surface of the inverted conical tube 2.

Then, the oblique peripheral surface 23 pushes out the divided ring 1, and as a result, the outer diameter of the drum formed by the group of curved arc surfaces 12 increases.

The expanded shape is stable because the focusing ring 3 is pressed down from above by the force of the spring 53, and the divided rings 1 do not come apart.

<C> Only the diameter reduction low-speed rotation transmission clutch 76 is brought into contact with the diameter reduction receiving gear 73, and the other clutches 74 and 75 are released.

Then, the rotation of the reduction gear 83 is transmitted to the central shaft 7, and the central shaft 7 rotates at a constant speed slightly slower than the rotating cylinder 6, which is rotating at a constant speed.

Then, the threaded cylinder 5 slowly rotates and rises, and the force of the push-up spring 44 causes the inverted conical cylinder 2 to rise.

Since the split ring 1 is pressed by the focusing ring 3 and the force is concentrated at the center, the drum diameter is reduced smoothly.

As described above, the present invention applies a focusing force to the center of a circle by dividing a torus whose outer curved surface forms a cylinder into a large number of divided torus bodies in the radial direction, and An inverted conical cylinder is formed into a sloped shape, and an inverted conical cylinder that slides in contact with this group of inner slopes is fitted into the rotating cylinder so that it can slide freely only in the axial direction of the cylinder. A penetrating central shaft is connected to a threaded cylinder that presses the upper surface of the inverted conical cylinder, and the central shaft is configured to be able to rotate at the same speed as the rotating cylinder or at a different speed.

Therefore, while giving constant speed rotation to the rotating cylinder and drum part,
By giving the central shaft a different speed than the rotating cylinder, the diameter of the drum part can be expanded or reduced while it continues to rotate.

Therefore, even when working directly on the outer curved surface of the divided ring group as a drum, or when bringing other rubber rollers etc. into contact with the drum surface to extract rotation, the circumference length can be changed or rotated while continuing rotation. It is a drum that can change speed and has an extremely wide range of applications.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of the Ni drum part, Figure 2 is a perspective view of the overall configuration of Figure 3, vertical sectional view, 1: split ring, 2: inverted conical cylinder, 3: focusing ring, 6: rotating cylinder, 7: Central shaft, 74, 75, 76: Electromagnetic clutch.

Claims (1)

[Scope of Claims] 1. A torus whose outer curved surface forms a cylinder is divided in the radial direction into a large number of divided torus bodies, and the outer surface of the group of divided toric bodies constitutes a drum and a circular shape. Applying a focusing force to the center, the inner slope of each divided toric body is brought into contact with the inverted conical tube, and the inverted conical tube is fitted into the rotating tube so that it can slide only in its axial direction, and the rotating tube has a constant speed. A threaded cylinder that applies rotation and pressurizes the top surface of the inverted conical cylinder is connected to a central shaft that penetrates the rotating cylinder, and when the central axis is given a rotational speed different from that of the rotating cylinder, The inverted conical tube is slid in the axial direction of the rotating tube, and the divided torus around the inverted conical tube is moved in a direction perpendicular to the axis of the rotating tube, and the outer diameter can be changed during rotation. drum.