JPH0478353A - Magnet type planetary friction disk wheel device - Google Patents

Abstract

PURPOSE:To suppress the generation of local abrasion and reduce noise while heightening rotating accuracy and corresponding to overload by working magnetic suction force on a planetary disc to push a planetary roller into a gap, thereby generating frictional force between the planetary roller and a power transmission disc, and between the planetary roller and a power transmitted disc. CONSTITUTION:When a ring electromagnet 7 is excited, a planetary disc 5 is sucked through a small gap, and a planetary roller 3 approaches along the tapered peripheral surface 2a of a power transmission disc 2 and the tapered inner face 8a of a power transmitted disc 8 to press hard. With this pressing force, frictional force is generated between the power transmission disc peripheral surface 2a and the planetary roller 3, and between the planetary roller 3 and the power transmitted disc inner face 8a. With this frictional force, the power of a transmission shaft 1 is transmitted to a transmitted shaft 9, whereas decelerating action is performed to the transmitted shaft 9 by releasing the driving of the power transmission shaft 1. When the excitation of the ring electromagnet 7 is cut off, the pressing force generated by the planetary roller 3 becomes extinct, and thereby power transmission and decelerating action are stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic planetary friction wheel device for smooth power transmission.

[Conventional technology]

Conventionally, in the case of power transmission that requires a large reduction ratio,
Planetary gearing is used.

Such a planetary gear device usually has a planetary gear between a sun gear and an internal gear that have the same center of rotation, and transmits the rotation of the sun gear to the internal gear via the planetary gear.
It is used in a wide range of fields including transmissions.

C Invention or problem to be solved] By the way, in such a planetary gear device, power is transmitted by meshing teeth, so localized wear is likely to occur due to the load being applied to one point, and backlash can cause problems. There was a problem in that the rotational accuracy was easily lost, and therefore high manufacturing accuracy was required for the gears. Also,
Even if an overload is applied, the force cannot be released, so
In some cases, the teeth were damaged and could not handle overload. Furthermore, in order to prevent gear wear due to meshing and ensure smooth transmission of power, it is absolutely necessary to use gears immersed in oil, so it is necessary to replace lubricating oil and replace worn gears. In this case, it is extremely troublesome and expensive, and it is impossible to avoid the generation of considerable noise due to the meshing of the gears and the gears.

The present invention is intended to solve the above problems, and is less likely to cause local wear, has no backlash, has high rotational accuracy, can handle overload, and can be replaced even if lubricating oil is used. The purpose of the present invention is to provide a magnetic planetary friction wheel device that is long-lasting, can further reduce noise, and has a simple structure.

[Means to solve the problem]

To this end, the present invention provides a power transmitting disk fixed to a power transmitting shaft and a transmitted disk fixed to a transmitted shaft. A plurality of planetary rollers rotatably supported by a planetary disk are provided in a gap formed on the inner surface of the peripheral edge of the disk, and each of the disks and the planetary rollers are arranged in a case. In the vehicle device, at least one of the surfaces forming the gap and the planet roller are provided with a taper, and a magnetic attraction force is applied between the planetary disk and the case or between the planetary disk and the other disk. A friction force is generated between the planetary roller, the power transmission disk, and the transmitted disk by providing a magnet that generates magnetic attraction force to the planetary disk and pushing the planetary roller into the gap. It is characterized by what it did.

Further, a third power transmission disk consisting of a pair of disks fixed to the power transmission shaft at a distance and connected to each other by a plurality of axes parallel to the power transmission shaft; A second power transmission disk consisting of a pair of disks through which a shaft passes through with a gap and is provided in a pair of disk tubes of the first power transfer disk; The two planetary disks are inserted into the gap formed by the circumferential surfaces of the pair of disks and the inner surface of the circumferential edge of the transmitted disk that protrudes opposite the circumferential surfaces and is fixed to the transmitted shaft. A planetary friction wheel device is provided with a plurality of planetary rollers rotatably supported at both ends, and each of the disks and the planetary rollers are arranged in a case, wherein one of the second power transmission disks The circumferential surfaces of the pair of disks are tapered so that the disk diameter becomes smaller on the side facing each other, and a magnet is provided on one opposing surface of the l pair of disks, and the planetary roller is A taper is formed so that the diameter becomes smaller toward both ends,
By moving the pair of discs of the second power transmission disc closer to each other using magnetic attraction force and pressing the tapered surfaces of the discs against the planetary disc, the planetary roller and the second power transmission disc are It is characterized in that a frictional force is generated between the plate and the transmitted disc.

[Effect]

The present invention arranges a planetary roller between a power transmission disc and a transmitted disc, and forms a taper on the surface of the power transmission disc and the transmitted disc that contacts the planetary roller, and on the planetary roller, and uses magnetic attraction force. Frictional force is generated by pressing the planetary roller against the power transmission disk and the transmitted disk, and power is transmitted by the two frictional forces. On the contrary, it becomes impossible to obtain frictional force, so there is no need for it. Iron particles due to wear will be attracted to the magnet, and even if the planetary roller is worn, the magnetic attraction force will cause the force to flow between the power transmitting disc and the transmitted disc along the taper. Since it is pressed against the surface, it can be used for a long period of time, and it is also possible to reduce noise.

〔Example〕

Examples will be described below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the magnetic planetary friction wheel device of the present invention. In the figure, 1 is a power transmission shaft, 2 is a power transmission disc, 3 is a planetary roller, 4 is a roller shaft, 5 is a planetary disc, 7
is a ring-shaped electromagnet, 8 is a transmitted disk, 9 is a transmitted shaft, 1
0 is a bearing, and 11 is a case.

The planetary friction wheel device is held in a case 11, and the power transmitting disc 2 and the transmitted disc 8 are arranged opposite each other, and the power transmitting disc 2, the power transmitting shaft 1 to which the transmitted disc 8 is fixed, and the transmitted disc 8 are The fixed transmission shafts 9 are rotatably supported by bearings 10, respectively. The periphery of the transmitted disc 8 is the power transmission disc 8
The inner surface 8a of the peripheral edge is tapered so as to widen toward the tip, and the power transmission disk 2 is housed in the recess surrounded by this projecting peripheral edge. The surface 2a faces the inner surface 8a of the peripheral portion of the transmitted disc 8. And the peripheral surface 2a of the power transmission disk 2
It is also formed into a tapered shape, and the distance between the tapered inner surface 8a and the tapered peripheral surface 2a becomes narrower from the tip of the peripheral edge of the transmitted disk 8 toward the root. A plurality of planetary rollers 3 having a tapered circumferential surface are inserted between the tapered inner surface 8a and the tapered circumferential surface 2a, and the planetary rollers 3 are attached to the circumferential edge of the planetary disc 5. It is rotatably attached to a provided roller shaft 4. At least the peripheral edge of the planetary disc 5 is formed from a magnetic material such as an iron plate, and a ring-shaped electromagnet 7 is disposed opposite to the peripheral edge with a small gap therebetween and is fixed to the case 11. Then, when the ring electromagnet 7 is excited, the planetary disk 5 is attracted,
As a result, the planetary roller 3 is pushed between the tapered peripheral surface 2a of the power transmission disk 2 and the tapered inner surface 8a of the transmitted disk 8.

In such a configuration, when the ring-shaped electromagnet 7 is excited, the planetary disk 5 is sucked through a small gap, and the planetary roller 3 or the tapered peripheral surface 2a of the power transmission disk 2 and the transmitted disk 8 It enters along the tapered inner surface 8a of and is strongly pressed. Due to this pressing force, a frictional force is generated between the circumferential surface of the power transmission disk and the planetary roller, and between the planetary roller and the transmitted disk, and due to this frictional force, the power of the power transmission shaft 1 is transferred to the transmitted shaft 9. On the other hand, if the drive of the power transmission shaft 1 is released, a deceleration effect is performed on the transmitted shaft 9. Furthermore, if the ring-shaped electromagnet 7 is de-energized, the pressing force by the planetary rollers will be eliminated, and power transmission and deceleration will no longer occur.

In this way, it is possible to transmit power and turn deceleration ON and OFF by turning the electromagnet ON and OFF.If the excitation intensity of the electromagnet can be changed continuously, the pressing force of the planetary roller can be applied continuously. Since it can be made variable, it is possible to smoothly transmit power during startup and the like.

In the above embodiment, the diameter of the transmitted disc was made larger than the diameter of the power transmission disc, but it is also possible to make the diameter of the power transmission disc side larger than the diameter of the transmitted disc so that the peripheral edge protrudes. The transmission target disk may be housed in a recess formed by this peripheral edge, and in that case, the positional relationship between the planetary disk and the electromagnet may be reversed.

FIG. 2 is a diagram showing another embodiment of the magnetic planetary friction wheel device of the present invention, and the same numbers as in FIG. 1 indicate the same contents. Note that 6 is a ring-shaped permanent magnet.

In this embodiment, a ring-shaped permanent magnet 6 is provided on the peripheral edge of the transmitted disk 8 and is opposed to the peripheral edge of the planetary disk 5.

In this embodiment, the ring-shaped permanent magnet 6 constantly attracts the planetary disk 5, and as a result, the planetary roller is attached to the tapered peripheral surface 2a of the power transmission disk 2 and the tapered inner surface 8a of the transmitted disk 8. The shaft enters along the shaft and is strongly pressed, and this pressing can transmit and decelerate power between the power transmitting shaft 1 and the transmitted shaft 9 by the frictional force caused by the force.

Incidentally, as in the case of Fig. 1, the diameter of the power transmission disk may be made larger, a ring-shaped permanent magnet may be provided on the periphery, and the planetary disk may be provided on the side of the transmitted disk. Needless to say.

FIG. 3 is a diagram showing another embodiment of the magnetic planetary friction wheel device of the present invention. In addition, in the figure, 2a, 2b, 12a, 12
b is a power transmission disk, 5a and 5b are planetary disks, 6' is a ring-shaped permanent magnet, and 13 is a shaft.

In this embodiment, the power transmission disks 2a and 2b are connected to the power transmission shaft 1.
The power transmission disks 2a are provided facing each other with a gap between them.
, 2b are tapered on their circumferential surfaces so that the diameter of the disk becomes smaller toward the opposing surfaces,
A ring-shaped permanent magnet 6'' is provided on one opposing surface of the power transmission discs 2a, 2b.In addition, the power transmission discs 2a,
The power transmission shaft 1 is connected by a plurality of shafts 13 passing through the
power transmission disks +2a and 12b fixed to the
, 2b are movable along the power transmission axis l so that they can approach each other. The planetary roller 3 is rotatably supported by planetary disks 5a and 5b on both sides, and has a cylindrical central portion and a beer barrel shape with a diameter decreasing toward the ends. A tapered surface is formed that matches the tapered peripheral surface of the power transmission disks 2a and 2b. The peripheral edge of the transmitted disc 8 is adapted to engage with the planetary roller 3 from the outside.

In such a configuration, the power transmission discs 2a and 2b move along the power transmission axis l and approach each other due to the attractive force of the permanent magnet 6', and the tapered peripheral surfaces of the power transmission discs 2a and 2b engage the planetary roller. 3 is pressed and a frictional force is generated. the result,
Power is power transmission shaft 1 → power transmission circle + ff I 2 a,
The power is transmitted as follows: 12b → shaft 13 → power transmission discs 2a, 2b → planetary roller 3 → transmitted disc 8. Note that a closed magnetic path is formed via the planetary roller 3, so if the planetary roller 3 tries to slip, the magnetic flux will be cut and a Lorentz force will be generated, which acts as a resistance force against slippage and causes the planetary roller to roll. Therefore, a function for relocating the planetary rollers 3 is added. Furthermore, since the ring-shaped permanent magnet 6' is attached to the power transmission disk 2, the diameter of the planetary friction wheel can be reduced.

〔Effect of the invention〕

■Since no gears are used, the configuration is simple and economical.

■Since it uses frictional force, there is no backlash, which increases rotational accuracy and reduces noise.

■Because the load is applied to a line rather than a point, it is difficult to cause local wear, and as there is almost no wear, it is possible to handle the load sufficiently without soaking the equipment in oil, and even when lubricating oil is used, it is lubricated. It is possible to have very long oil change intervals. Even if wear occurs, the planetary roller is pressed between the power transmitting disc and the transmitted disc along the taper and operates effectively, and the generated iron particles are attracted by magnets, so it can be used for a long time. becomes.

■Since it uses frictional force, there is no risk of slipping and damage due to excessive loads.

■If an electromagnet is installed on the fixed case side, it becomes possible to transmit and stop power by turning on and off the excitation of the electromagnet.

[Brief explanation of drawings]

Fig. 1 is a diagram showing one embodiment of the magnetic planetary friction wheel device of the present invention, Fig. 2 is a diagram showing another embodiment in which a ring-shaped permanent magnet is provided on the transmitted disk, and Fig. 3 is a diagram showing the power It is a figure which shows the other Example which provided the permanent magnet in the transmission disk. 1... Power transmission shaft, 2.2a, 2b, 12a, 12b
... Power transmission disk, 3 ... Planetary roller, 4 ... Roller shaft, 5 ... Planetary disk, 6.6', 7 ... Ring-shaped electromagnet, 8 ... Transmitted Disc, 9...transmitted shaft,
10 bearing, 11... case, 13... shaft. Figure 2 Figure 3

Claims (4)

[Claims] (1) The circumferential surface of one of the power transmitting disks fixed to the power transmitting shaft and the transmitted disk fixed to the transmitted shaft, and the other disk protruding to face the circumferential surface. A planetary friction wheel device in which a plurality of planetary rollers rotatably supported by planetary disks are provided in a gap formed on the inner surface of the peripheral edge of the device, and each of the disks and the planetary rollers are arranged in a case. At least one of the surfaces forming the gap and the planetary roller are provided with a taper, and a magnet that generates a magnetic attraction force is provided between the planetary disk and the case, and the magnetic attraction force is applied to the planetary disk. A magnetic planetary friction wheel device, characterized in that by forcing the planetary roller into the gap, a frictional force is generated between the planetary roller, the power transmission disk, and the transmitted disk. (2) The magnetic planetary friction wheel device according to claim 1, wherein the magnet is constituted by a ring-shaped electromagnet, and is driven and stopped by turning on and off the excitation of the electromagnet. (3) A circumferential surface of one of the power transmitting disks fixed to the power transmitting shaft and a transmitted disk fixed to the transmitted shaft, and the other disk protruding to face the circumferential surface. A planetary friction wheel device in which a plurality of planetary rollers rotatably supported by planetary disks are provided in a gap formed on the inner surface of the peripheral edge of the device, and each of the disks and the planetary rollers are arranged in a case. At least one of the surfaces forming the gap and the planet roller are provided with a taper, and a magnet that generates a magnetic attraction force is provided between the planetary disk and the other disk, and the magnetic attraction force is applied to the planetary disk. A magnetic planetary friction wheel device characterized in that a frictional force is generated between the planetary roller, the power transmission disk, and the transmitted disk by forcing the planetary roller into the gap by acting on a plate. (4) a first power transmission disk consisting of a pair of disks fixed to the power transmission shaft at a distance and connected to each other by a plurality of axes parallel to the power transmission shaft; a second power transmission disk consisting of a pair of disks, the shaft of which passes through the disk with a gap therebetween, and which is provided in a pair of disk tubes of the first power transfer disk; Two planetary disks are placed in a gap formed by the circumferential surface of the pair of disks and the inner surface of the circumferential edge of the transmitted disk that protrudes opposite the circumferential surface and is fixed to the transmitted shaft. A planetary friction wheel device is provided with a plurality of planetary rollers rotatably supported at both ends thereof, and each of the disks and the planetary rollers are arranged in a case, the device comprising: a second power transmission disk; The circumferential surfaces of the pair of disks are tapered so that the disk diameter becomes smaller on the opposing surfaces, and a magnet is provided on one opposing surface of the pair of disks, and the planetary roller is , a taper is formed so that the diameter becomes smaller toward both ends,
By moving the pair of discs of the second power transmission disc closer to each other using magnetic attraction force and pressing the tapered surfaces of the discs against the planetary disc, the planetary roller and the second power transmission disc are A magnetic planetary friction wheel device characterized by generating frictional force between a plate and a transmitted disc.