JPS63210449A - Transmission - Google Patents

Abstract

PURPOSE:To transmit a large torque and save a rotation driving force by providing planetary rollers which are rotatably inscribed with the taper face of an outer ring, and using said outer ring which energizes a sun roller and said sun roller which are made of magnetic substance and said planetary rollers made of a permanent magnet. CONSTITUTION:With a center shaft 10 fixed and as an outer ring 1 is rotated as an input shaft, planetary rollers 15 revolves around a sun roller 11 while rotating on their own axes and, accompanying this, a planetary roller installing shaft 5 is rotated with a change speed with respect to the outer ring 1 serving as an output shaft. And, by connecting the output shaft of equipment to the outer ring 1 or the planetary roller installing shaft 5 or the center shaft 10 in accordance with the purpose of use, the output shaft at the time of operating while being fixed to one of the center shaft 10, the planetary roller installing shaft 5, and the outer ring 1 is determined the output shaft of the device. The planetary rollers 15 made of permanent magnet which are rotatably installed between the outer ring 1 and the sun roller 11 which are made of magnetic substance, are magnetically attracted to the outer roller 1 and the sun roller 11 enabling the transmission of large torque while enabling the rotation transmission driving force to be small for that amount, and enabling miniaturization.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transmission that has a large transmission torque and can be downsized by reducing rotational driving force.

``Prior Art'' Conventionally, a transmission is known in which a plurality of gears are meshed together to transmit the rotation of a human-powered shaft to an output shaft by decelerating or increasing the speed.

"Problems to be Solved by the Invention" However, in such conventional transmissions, there is backlash in the meshing part of the 1" seal wheel, which causes a large friction loss and reduces the transmitted torque. This requires extra driving force from the rotary drive source, and as a result, the rotary drive source becomes large, which also increases the size of the entire transmission, which also has the disadvantage of generating noise.

An object of the present invention is to provide a transmission that solves the above-mentioned problems of conventional transmissions.

"Means for Solving the Problems" The first invention has the following configuration to achieve the above object. That is, a cylindrical outer ring, a planetary roller mounting shaft rotatably provided within the outer ring with the roller mounting portion prevented from moving in the axial direction, and a planetary roller mounting shaft coaxial with and rotatable with the planetary roller mounting shaft. A sun which is fixedly attached coaxially to one end of the center shaft and whose outer peripheral surface is formed into a tapered surface whose diameter gradually decreases from one end of the center shaft to the other end of the center shaft. a roller, a tapered surface provided on the inner periphery of the outer ring so that the diameter gradually decreases from one end side to the other end side of the central shaft, and a roller mounting portion of the planetary roller mounting shaft rotatably mounted. ,
The outer circumferential surface is formed into a tapered surface whose diameter gradually becomes smaller as it goes from one end side to the other end side of the m central axis, and is rotatably inscribed in the tapered surface of the outer ring and rotatably circumscribed in the sun roller. A planetary roller and a biasing means provided to bias the IF sun roller from one end side to the other end side of the center shaft are provided.

Further, the second invention includes a cylindrical outer ring made of a magnetic material,
a planetary roller mounting shaft having a roller mounting portion and rotatably provided within the outer ring and prevented from moving in the axial direction; a center shaft coaxially and rotatably provided with the planetary roller mounting shaft; a sun roller made of a magnetic material, which is coaxially fixedly attached to one end of the central shaft, and whose outer circumferential surface is formed into a tapered surface whose diameter gradually decreases from one end of the central shaft to the other end; The outer ring is rotatably attached to a tapered surface provided on the inner periphery of the outer ring so that the diameter becomes gradually smaller from one end of the shaft to the other end, and the roller mounting portion of the planetary roller mounting shaft. It is formed into a tapered surface whose diameter gradually becomes smaller as it goes from one end of the central shaft to the other end, and is rotatably inscribed and magnetically attached to the tapered surface of the outer ring, and rotatably circumscribed and magnetically attached to the sun roller. A planetary roller made of a permanent magnet attached to the center shaft, and a biasing means provided to bias the sun roller from one end side to the other end side of the central shaft are provided. In the invention, the planetary roller has a tapered surface of the outer ring,
In the second invention, the planetary rollers surely enter between the tapered surface of the outer ring and the sun roller to prevent them from slipping between the sun roller and the tapered surface of the outer ring. When the tapered surface and the sun roller are securely contacted and magnetically attached, and in both the first and second inventions, the center shaft is fixed and the planetary roller mounting shaft is rotated as the input shaft,
The planetary roller revolves around the sun roller while rotating,
Along with this, the outer ring rotates at a variable speed relative to the planetary roller mounting shaft and becomes an output shaft.

When the center shaft is fixed and the outer ring l is rotated as an input shaft, the planetary rollers rotate and revolve around the sun roller, and accordingly, the planetary roller mounting shaft rotates at a variable speed relative to the outer ring and becomes an output shaft.

Furthermore, when the planetary roller mounting shaft is fixed and rotated using the center shaft as an input shaft, the planetary roller rotates and the outer ring rotates at a variable speed (deceleration) and becomes an output shaft.

Furthermore, when the planetary roller mounting shaft is fixed and rotated using the outer ring as an input shaft, the planetary roller rotates, and the central shaft rotates at a variable speed (increasing speed) and becomes an output shaft.

In addition, if the outer ring is fixed and rotated using the center axis as the input axis, the planetary roller will rotate and revolve around the sun roller.
Accordingly, the planetary port/-ra mounting shaft rotates at a variable speed and becomes an output shaft.

Furthermore, when the outer ring is fixed and the planetary roller mounting shaft is used as an input shaft to avoid rotation, the planetary roller rotates and revolves around the sun roller, and the central shaft rotates at a variable speed and becomes an output shaft.

"Embodiment" Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 3. 1 in Figure 1 is a magnetic material (iron) with a bottom 2
The inner circumferential surface of the opening 3 of the outer ring 1 has a bottom 2 extending from one end of the opening 3 of the outer ring 1.
A tapered surface 4 is formed that gradually becomes smaller in diameter as it approaches.

A planetary roller mounting shaft 5 is rotatably fitted to the outer ring 1 via a bearing 6.6. The planetary roller mounting shaft 5 has a flange (roller mounting portion) (arm) 8 at one end of a cylindrical shaft 7. The cylindrical shaft 7 is fitted into the bottom 2 of the outer ring l, and the flange 8 is inserted into the bottom part 2 of the outer ring l. It is loosely fitted into the opening 3. 9 is color.

Further, a center shaft 10 is rotatably fitted into the planetary roller mounting shaft 5 so as to be coaxial with the cylindrical shaft 7 of the planetary roller mounting shaft 5. Both ends of the central shaft 10 protrude from the planetary roller mounting shaft 5, and a magnetic (iron) sun roller it is fixed and coaxially attached to one end of the central shaft IO. 12 is a key. The outer periphery of the sun roller 11 is formed into a tapered surface that gradually becomes smaller in diameter from one end of the central shaft 10 toward the other end. The sun roller 11 is located within the opening 3 of the outer ring l.

A flange 13 is integrally provided at the other end of the central axis IO, and between this flange 13 and the planetary roller mounting shaft 5, a sun roller II is inserted from one end of the central axis IO to the other end. A spring (biasing means) 14 is provided for biasing.

Furthermore, three planetary rollers 15 are provided between the tapered surface 4 of the outer ring l and the sun roller 11.

As shown in FIG. 3, the planetary roller 15 is made up of a permanent magnet 16 made up of three ring plates and a ring-shaped non-magnetic material (synthetic resin) 17 provided between these three permanent magnets in a laminated manner. and are attached coaxially. The outer periphery of each planetary roller 15 is formed into a tapered surface that gradually becomes smaller in diameter as it goes from one end of the central axis IO to the other end. Each planetary roller 15 is arranged at three equal positions in the circumferential direction, and is rotatable by a roller shaft 18 on the flange 8 of the planetary roller mounting shaft 5 so as to be inscribed in the tapered surface 4 of the outer ring l and circumscribed in the sun roller 11. It is attached to the outer ring 1, is allowed to rotate, and is magnetically attached to the tapered surface 4 of the outer ring 1 and the sun roller 11.

A small gap is provided between the center hole of the planetary roller 15 and the roller shaft 18.

Next, the operation of the transmission configured as described above will be explained. In any of the cases described below, the planetary roller 1
5 is biased and pressed by the force of the spring 14 via the sun roller 11 from one end of the central shaft 10 to the other end, and is magnetically attached to the tapered surface 4 of the outer ring 1 and the sun roller 11 . Here, the planetary roller 15 has a slight gap between the center hole of the planetary roller 15 and the roller shaft 18, and the planetary roller 15 and the sun roller 11 are tapered rollers, and the force of the spring 14 causes the sun roller to 11 from one end side of the central axis lO toward the other end side, the tapered surface 4. It reliably enters between the sun rollers 11 and is magnetically attached. By the way, the sun roller 11 and the planetary roller 1
If 5 is a straight cylindrical roller, then
If the machining accuracy of these cylindrical rollers is not very high, there is a risk of slipping between these cylindrical rollers and poor rotation transmission, and special measures such as sealing oil between these rollers will be required. In the example, this is not necessary.

Therefore, first, when the central shaft 10 is fixed and the planetary roller mounting shaft 5 is rotated as a manual shaft, the planetary roller 15 rotates and revolves around the sun roller ti, and as a result, the outer ring 1 is rotated around the planetary roller mounting shaft. It rotates at variable speed relative to l0 and becomes an output shaft.

Furthermore, when the central shaft 10 is fixed and rotated using the outer ring l as an input shaft, the planetary roller 15 rotates and the sun roller II
The planetary roller mounting shaft 5 rotates at a variable speed with respect to the outer ring i and becomes an output shaft.

Further, when the planetary roller mounting shaft 5 is fixed and the center shaft 10 is rotated as a human power shaft, the planetary roller I5 rotates, and the outer ring 1 rotates at a variable speed (deceleration) and becomes an output shaft.

Further, when the planetary roller mounting shaft 5 is fixed and rotated using the outer ring 1 as an input shaft, the planetary roller 15 rotates, and the central shaft IO rotates at a variable speed (increasing speed) and becomes an output shaft.

Furthermore, when the outer ring 1 is fixed and the central axis IO is rotated as a manual shaft, the planetary roller 15 rotates on its own axis and revolves around the sun roller 11. Accordingly, the planetary roller mounting shaft 5 rotates at a variable speed and becomes an output shaft. .

Further, when the outer ring I is fixed and rotated using the planetary roller mounting shaft 5 as an input shaft, the planetary roller 15 rotates and revolves around the sun roller 11, and accordingly, the central shaft 10 rotates at a variable speed and becomes the output shaft. Become.

In addition, outer ring 1. Planetary roller mounting shaft5. Taiyo Roller II,
The rotation speed of the planetary roller 15 is calculated by a known calculation method for a planetary gear mechanism.

In addition, when using the transmission of this embodiment, the output shaft of the device is connected to the outer ring I, the planetary roller mounting shaft 5, or the center shaft 10, depending on the purpose of use. Planetary roller mounting shaft5. The output shaft during each operation with the outer ring l fixed may be used as the output shaft of the device.

According to this embodiment, although the structure is simple, the processing is simple without requiring precision, the friction loss in rotation transmission is extremely small, and the planetary roller! 5 is magnetically attached to the outer ring l and the sun roller 11, it is possible to transmit a large torque, and the rotational transmission driving force is correspondingly small. Therefore, a rotational drive source with a smaller rotational driving force than the conventional one can be used. This makes it possible to reduce the size of the transmission, which in turn allows the entire transmission to be made smaller.Since the rotation transmission means is based on line contact of the rollers, it is possible to prevent the generation of operational noise, and to reduce the size of the transmission. The scope of use can be greatly expanded.

In addition, in the above embodiment, the outer ring 1. sun roller 11
is made of a magnetic material, and the planetary roller 15 is made of a permanent magnet, but the invention is not limited to this, and these may be made of a material not particularly related to magnetism.

"Effects of the Invention" According to the first invention, a cylindrical outer ring, a planetary roller mounting shaft having a roller mounting portion and rotatably provided in the outer ring and prevented from moving in the axial direction; A central shaft coaxially and rotatably provided on the planetary roller mounting shaft, and a central shaft that is fixed coaxially to one end of the central shaft and whose outer peripheral surface gradually changes from one end of the central shaft to the other end. a sun roller formed on a tapered surface having a small diameter; a tapered surface provided on the inner periphery of the outer ring so that the diameter gradually becomes smaller from one end side to the other end side of the central shaft; and the planetary roller mounting shaft. is rotatably attached to the roller mounting portion of the outer ring, the outer circumferential surface is formed into a tapered surface whose diameter gradually becomes smaller as it goes from one end side of the central shaft to the other end side, and is rotatably inscribed in the tapered surface of the outer ring. The structure is made up of a planetary roller that rotatably circumscribes the sun roller, and a biasing means provided to bias the sun roller from one end of the central shaft to the other end. is simple and does not require precision, and the friction loss in rotational transmission is extremely small.As a result, large torque can be transmitted, and the rotational transmission driving force is correspondingly small.Therefore, the rotational driving force is smaller than before. It is possible to use a rotational drive source and to make it smaller, which in turn allows the entire transmission to be made smaller, and since the rotation transmission means is based on line contact of the rollers, the generation of operational noise is prevented. This greatly expands the range of applications for various devices.

Furthermore, in the second invention, in addition to the first invention, the outer ring and the sun roller are made of a magnetic material, and the planetary rollers are made of a permanent magnet. Not only do they make line contact, but they also magnetically attach to the tapered roller and the sun roller, so
sun roller.

The transmission of rotation between the a-star roller and the outer ring becomes more reliable, and the transmitted torque increases significantly.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a sectional view of the planetary roller. l...Outer ring, 2...Bottom, 5...
... Planetary roller mounting shaft, 8 ... Flange (roller mounting part) (arm), 10 ... Center shaft, 11 ...
... Sun roller, 14 ... Spring (biasing means)
, I5... Planetary roller.

Claims (2)

[Claims] (1) A cylindrical outer ring, a planetary roller mounting shaft that has a roller mounting portion and is rotatably provided within the outer ring and is prevented from moving in the axial direction, and that rotates coaxially with the planetary roller mounting shaft. A sun which is fixedly attached coaxially to one end of the center shaft and whose outer peripheral surface is formed into a tapered surface whose diameter gradually decreases from one end of the center shaft to the other end of the center shaft. a roller, a tapered surface provided on the inner periphery of the outer ring so that the diameter gradually decreases from one end side to the other end side of the central shaft, and a roller mounting portion of the planetary roller mounting shaft rotatably mounted. , an outer peripheral surface is formed into a tapered surface whose diameter gradually decreases from one end side to the other end side of the central shaft, and is rotatably inscribed in the tapered surface of the outer ring and rotatably circumscribed in the sun roller. A transmission comprising a planetary roller and a biasing means provided to bias the sun roller from one end side to the other end side of the central shaft. (2) A cylindrical outer ring made of a magnetic material, a planetary roller mounting shaft that has a roller mounting portion and is rotatably provided within the outer ring and is prevented from moving in the axial direction, and is coaxial with the planetary roller mounting shaft. A central shaft is rotatably provided in a shape, and a tapered surface that is coaxially fixed to one end of the central shaft and has an outer circumferential surface that gradually becomes smaller in diameter as it goes from one end of the central shaft to the other end. A solar roller made of a magnetic material formed;
a tapered surface provided on the inner periphery of the outer ring so that the diameter gradually decreases from one end side to the other end side of the central axis;
The planetary roller mounting shaft is rotatably attached to the roller mounting portion of the planetary roller mounting shaft, and the outer circumferential surface is formed into a tapered surface that gradually becomes smaller in diameter as it goes from one end of the center shaft to the other end, and rotates on the tapered surface of the outer ring. a planetary roller made of a permanent magnet that freely inscribes and magnetically attaches to the sun roller and rotatably circumscribes and magnetically attaches to the sun roller; A transmission characterized by comprising a biasing means provided in the transmission.