JPH04131555A - Friction gearing method using magnet and device therefor - Google Patents

Abstract

PURPOSE:To obtain a friction gearing allowing a moderate slip at the overloaded time and enabling highly accurate positioning using magnetism by providing a motive power roll with magnetic force so as to attract a passive body to the motive power roll by the magnetic force, and transmitting power by the generated friction holding force. CONSTITUTION:A magnetic pulley 1 is provided with magnetic pole plates 4, 5 made of ferromagnetic material fixed to both sides of a disc magnet 3 magnetized in such a way that the S-pole appears on one side and the N-pole appears on the other side, and the peripheral surface of the magnetic pole plate 4 is made the S-pole and that of the magnetic pole plate 5 is made the N-pole. The peripheral surface of the magnetic pulley 1 is recessed into circular arc shape of the same diameter as that of a rail 2 so as to correspond to the circular cross section shape of the rail 2, and the rail 2 is formed into a round bar made of ferromagnetic material. The rail 2 is attracted to the magnetic pulley 2 by the magnetic force generated from the magnetic pole plates 4, 5, and when the magnetic pulley 1 is rotated receiving the torque on the drive source side, the rail 2 is conveyed by the frictional force generated by the attractive force of the rail 2 to the magnetic pulley 1.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a friction transmission method using magnetism and an apparatus therefor.

"Prior Art and Problems to be Solved by the Invention" In general, the following methods are known as power transmission methods.

■ A method of transmitting power using various gear groups.

■ Various balls, rollers, etc. are sandwiched between the driving side and the driven part, and the space between the driving side member and the driven member is pressed by a spring, etc., and the mutual distance between the driving side member and the driven member obtained by this pressing force is A method of transmitting power by creating frictional resistance.

However, method (■) above is widely used (
Although it is used, because there is a harakrash in the mechanism,
Precise starting and stopping, that is, positioning to a predetermined position is not easy. Also, the method of ■ above has fewer bancranches, but
It is a mechanism that mainly uses a spring to press between the driving side member and the driven member to obtain frictional resistance for power transmission. The inch structure results in a complicated structure, and the number of parts is large, and furthermore, during high-speed operation, there is a risk that vibrations may occur due to the followability of the spring.

In view of the above-mentioned circumstances, the present invention has been developed to prevent backlash (and to reduce the complexity of the structure by pressing a spring or the like between the driving member and the driven member to obtain frictional resistance for power transmission). To provide a friction transmission method using magnetism and a device therefor, which can have a simple structure and allow for moderate slip at the time of overload without causing damage, and can also perform ultra-precise positioning.

"Means for Solving the Problems" The present invention has been made to achieve the above object, and in claim (1), magnetic force is applied to the driving roll when receiving the passive body and transmitting power. This is a friction transmission method using a magnet, characterized in that the passive body is attracted to the drive roll by its magnetic force, and power is transmitted by its friction holding force. In claim (2), in the above claim (1),
It is characterized by changing the diameter of a driving roll in each part, and transmitting power by magnetically attracting a repositionable passive roll to the circumferential surface of the driving roll whose diameter changes. be. Claim (3) is characterized in that the driving roll that receives the passive body and transmits power is composed of a disk-shaped magnet and a ferromagnetic plate attached to the magnet, and the passive body is formed of a ferromagnetic material. This is a friction transmission device that uses magnets. Claim (4) provides that, in the above claim (3), the passive body is formed in a roll shape and includes a polar magnet that attracts the magnet of the driving roll, and a ferromagnetic plate attached to the magnet. It is characterized by:

According to a fifth aspect of the present invention, in the above-mentioned aspect of the present invention, the driving roll is formed by alternately layering a plurality of magnets and ferromagnetic plates. According to claim (6), in the above-mentioned claim (4), a passive roll is magnetically attracted to the circumferential surface of a driving roll whose roll diameter differs in each part so as to be repositionable. . According to a seventh aspect of the invention, in the fourth aspect of the invention, the passive roll is formed by alternately layering a plurality of magnets and ferromagnetic plates. Claim (8) states that in Claim (4), the passive roll has a threaded portion that is attracted by the magnetic force of the driving roll, and is arranged to be rotatable and movable in the thrust direction. This is a characteristic feature. In claim (9), according to claim (4), the circumferential surface of a passive roll is repositionably attracted to the end surface of the driving roll by magnetic force, and the end surface of the second passive roll is attached to the circumferential surface of the passive roll. It is characterized by being attracted by magnetic force.

"Embodiments" Below, embodiments of the friction transmission method and device using magnetic force according to the present invention will be described based on the drawings. First, the apparatus and method of the first embodiment shown in FIGS. 1 and 2 will be explained. In FIGS. 1 and 2, 1 is a magnetic pulley;
2 is a rail.

The magnetic pulley 1 has magnetic pole plates 4.5 made of ferromagnetic material fixed to both sides of a disk-shaped magnet 30. The magnet 3 is magnetized so that the S pole appears on both sides and the N pole appears on the other side, so that the circumferential surface of one magnetic pole plate 40 is magnetized to the S pole, and the other magnetic pole plate 5 is magnetized. The circumferential surface of is magnetized to the north pole. As described above, the circumferential surface of the magnetic pulley 1 consisting of the magnet 3 and the magnetic pole plate 4.5 is recessed into an arc shape with the same diameter to match the circular cross-sectional shape of the rail 2.

On the other hand, the rail 2 is formed into a round bar shape made of ferromagnetic material. A rotating shaft 6.7 is provided protruding from the magnetic pole plate 4.5.
The rotating shaft 6.7 is connected to a rotating shaft on the drive source side. It is also possible to drill a shaft hole in the rotation center of the magnetic pulley 1 and fit the rotation shaft on the drive source side into the shaft hole.

Next, to explain the transmission method, the rail 2 is attracted to the magnetic pulley 1 by the magnetic force generated from the magnetic pole plate 4.5, and when the magnetic pulley 1 is rotated by the rotational force of the drive source,
The rail 2 is conveyed by the frictional force generated by the attraction force of the rail 2 to the magnetic pulley 1. At this time, the magnetic circuit is
It is a closed magnetic path that returns from the magnet 3 to the magnet 3 via one magnetic pole plate 5, the rail 2, and the other magnetic pole plate 4.

The friction torque generated by the magnetic force is related to the size of the magnetic pulley 1 and the strength of the magnetic force of the magnet 3. When the friction torque causes a large passive force on the rail side to become overloaded, the magnetic pulley 1 and It is also possible to prevent damage to equipment on the driving source side due to overload caused by slipping between the rails 2. Of course, the opposite method in which the rail 2 is moved linearly and the magnetic pulley 2 is rotated can also be adopted.

The shape of the magnetic pulley 1 is formed to match the shape of the rail 2 as shown in FIGS. 3 and 4 when the object to be transported has a polygonal cross section such as a square or hexagon. Further, as shown in FIG. 5, if the rail 2 has a groove 8 with a circular cross section and a semicircular arc cut out, the circumferential surface of the magnetic pulley 1 should be shaped to match the shape of the groove 8. It is also possible to protrude in a semicircular arc shape.

The 6th session shows the second embodiment, in which two magnetic pulleys 1 shown in FIGS. 1 and 2 are arranged oppositely with the rail 2 in between, and the attraction force due to the magnetic force of the magnetic boot I71 to the rail 2. In this case, either one of the magnetic pulleys 1 is rotationally driven by a drive source, or both magnetic pulleys 1 are rotated.
It is possible to use any method in which both are rotationally driven by a driving source.

Conversely, it is also possible to linearly move the rail 2 using an air cylinder or the like, thereby rotating each magnetic pulley 1. The rest is the same as the first embodiment.

In this case, since the rail 2 has a circular cross section, the angle difference (inclination angle) between one magnetic pulley 1 and the other magnetic pulley 1 can be freely set as shown in FIG.

FIG. 7 shows a third embodiment, in which a rail 2 of the same shape is arranged in the opposite direction on the other side of the magnetic pulley 1 shown in FIG. When moving in one direction, the other rail 2 moves in the opposite direction, and the rest is the same as the first embodiment.

FIG. 9 shows a fourth embodiment, in which, like the magnetic pulley 1, the rail 9 is connected to a long magnetic pole plate l0111 and a magnet 1, respectively.
It has a three-layer structure with 2 attached. The magnet 12 is magnetized so that the side to which one magnetic pole plate 10 is attached is the S pole, and the side to which the other magnetic pole plate 11 is attached is magnetized to the N pole. Therefore, the magnetic pulley of the one magnetic pole plate IO is The end surface that attracts 1 is the S pole, and the magnetic pulley 1 of the other magnetic pole plate 11
The end faces that are attracted to are respectively magnetized to N poles. Each magnetic pole plate 4.5 of the magnetic pulley 1 is arranged so that each magnetic pole plate 10.11 of the rail 9 faces each other with different polarities, so that an attractive force acts on the magnetic pulley 1 and the rail 9. A closed magnetic circuit is formed between the two.

The rest is the same as the first embodiment.

In addition to the hexagonal shape shown in FIG. 9, the shape of the magnetic pulley 1 and the rail 9 is such that the rail 9 shown in FIG. 10 has a square cross section and the magnetic pulley 1 has a shape that matches the shape of the rail 9. As shown in FIG. 2, the rail 9 has a circular cross section, and the magnetic pulley 1 can be shaped to match the shape of the rail 9. Even if the rail 9 has a rectangular cross section as shown in FIG. 12, it is also possible to simply flatten the peripheral surface of the magnetic pulley 1 that receives the rail 9. Furthermore, as shown in FIG. It is also possible to form the flange 13 on one side of the circumferential surface. Furthermore, as shown in FIG.
and magnetic throat 3.12 of rail 9 and magnetic plate 1O21
The number of magnetic pulleys 1 and 1 is increased to form a multilayer structure, thereby increasing the adhesion force between the magnetic pulley 1 and the rail 9, that is, the frictional resistance force, thereby increasing the transmitted force. The rest is the same as the first embodiment.

FIG. 15 shows a fifth embodiment, and shows the first to fourth embodiments.
Rubber, synthetic resin, or rust-proof metal film is formed on the mutually adhering surfaces of the magnetic pulley 1 and rail 2.9 shown in the example, so as to increase the coefficient of friction and obtain a rust-preventing effect. The rest is the same as each embodiment.

FIG. 16 shows a sixth embodiment, in which the magnetic pulley 1 has a multilayer structure in which a large number of magnets 3 and magnetic pole plates 4.5 are laminated, and its circumferential surface is formed in the shape of a series of many chevrons, while the rail 2 As in the first embodiment, the surface which is made of a ferromagnetic material and attracts the magnetic pulley 1 is formed in a shape that matches the circumferential shape of the magnetic pulley 1. The rest is the same as the first embodiment and the fourth embodiment. Further, as shown in FIG. 17, it is also possible to use a rotating pulley 14 made of a ferromagnetic material in place of the rail 2. The rotary pulley 14 is formed in a shape matching the circumferential shape of the magnetic pulley 1.

18 and 19 show a seventh embodiment, in which a rotating boulier 4 made of a ferromagnetic material is disposed on a magnetic pulley 1 having the same configuration as that shown in the first embodiment, and The magnetic force is used to attract the rotary pulley 14, and the frictional resistance at the time of attraction causes the rotary pulley 14 to follow and rotate as the magnetic pulley 1 rotates. At this time, as shown in FIG. 20, the rotary pulley 14 is circular in cross section, and the peripheral surface of the magnetic pulley l, which is attracted between the rotary pulley 14 and the rotary pulley 14, is formed into a shape that matches the rotary pulley 14. By doing so, it is also possible to rotate the magnetic pulley 1, which is rotationally driven by the motor 15, with respect to the rotary boob IJ 14 to set an angular difference (inclination angle) as desired.

FIG. 21 shows an eighth embodiment, in which a cylinder 16 is rotatably supported on a bearing 17 so as to be movable in the thrust direction, and a spring 18 made of a ferromagnetic material is wound around the circumferential surface of the cylinder 16. It is equipped. The spring 18
The same magnetic pulley 1 as in each of the above embodiments, which is driven by a motor 15, is attracted thereto. When the magnetic pulley l is rotated by the motor 15, the spring 18 is attracted to the magnetic pulley 1 and rotates due to its frictional resistance.
At this time, the cylinder 16 moves in the thrust direction according to the rotation angle of the spring 18. In other words, the cylinder 16 can obtain a predetermined rotation angle and a predetermined movement amount simultaneously with the rotation of the magnetic pulley 1, and nonlinear movement control is possible.

The shape of the cylinder 16 is not limited to a cylindrical shape, and various shapes such as a cylindrical shape and a cone shape can be adopted, and the spring 18 can be wound along such a shape.

FIG. 22 shows a ninth embodiment, in which the magnetic pulley l of each of the above embodiments is utilized as a driving roller to cause a ferromagnetic plate 20 provided with an adsorption friction surface 19 on a curved end face to move nonlinearly. The magnetic pulley 1 is attracted to the attraction friction surface 19 of the ferromagnetic plate 20 by its magnetic force, and as the driving roller rotates, the attraction friction surface 19 is drawn from the solid line to the dashed line in FIG. The non-linear movement is performed according to the shape of the end face of 19.

FIG. 23 shows a tenth embodiment, in which a curved roller 22 made of a ferromagnetic material and having a concave curved surface 21 is rotatably supported on a bearing 23. One or more of the magnetic pulleys 1 of each of the above-mentioned embodiments having a magnetic pulley 1 are attracted by their magnetic force so as to be freely repositionable. Then, when the curved roller 22 is rotated, the magnetic pulley 1, which is attracted to the curved surface 21, rotates as in each of the above embodiments. At this time, if the magnetic pulley 1 is rotated in the inclination direction to change the attraction position with the curved surface 21, the diameter of the curved surface 21 at the position where the magnetic pulley 1 attracts changes, so the rotation speed of the curved roller 22 remains the same. However, the rotational speed of the magnetic pulley l can be varied, that is, it can be used as a transmission. magnetic pulley 1
The rotational force can be extracted from the universal joint. or,
Conversely, the bending roller 22 is rotated by rotating the magnetic pulley 1 side.
It is also possible to rotate.

The 24th time shows the 11th embodiment, in which a cone roller 24 made of a ferromagnetic material is rotatably supported on a bearing 23, and the cone roller 24 is equipped with the magnetic pulley 1 of each of the above embodiments.
is adsorbed so that it can be repositioned freely. When the cone roller 24 is rotated, the magnetic pulley l attracted to the circumferential surface of the cone roller 24 also rotates in the same manner as in each of the above embodiments. When the cone roller 24 is moved along the magnetic pulley 1, the diameter of the cone roller 24 at the position where the magnetic pulley 1 attracts changes. Therefore, even if the rotation speed of the cone roller 24 is constant, a so-called speed change mechanism is provided in which the rotation speed of the magnetic pulley 1 changes when the adsorption position with the cone roller 24 changes. In this case, it is also possible to rotate the magnetic pulley 1 side.

FIG. 25 shows a twelfth embodiment, in which two ferromagnetic disks 25, 26 are arranged facing each other in a rotatable manner with a bearing 23 at an interval, and between each ferromagnetic disk 25, 26, In this embodiment, one or more magnetic pulleys 1 having a structure as in each of the embodiments described above are arranged to be rotatable and movable in directions toward and away from the center of rotation of each ferromagnetic disk 25,260. As in the above embodiment, the magnetic pulley 1 is attracted to the surface of the ferromagnetic disks 25 and 26 by its magnetic force. When one of the ferromagnetic discs 25 is driven to rotate, the magnetic pulley 1 that attracts the ferromagnetic disc 25 rotates. The rotation directions of the magnetic pulleys 1 facing each other around the center of rotation of the ferromagnetic disk 25 are opposite to each other. Furthermore, the other ferromagnetic disk 26 that is attracted to the magnetic pulley l also rotates, but in the opposite direction to the rotation direction of the one ferromagnetic disk 25. If the magnetic pulley l is moved toward or away from the center of rotation of the ferromagnetic disk 25.26, the distance from the center of rotation of the ferromagnetic disk 25.260 to which the magnetic boo 'J 1 is attracted will depend. When the rotation speed of the magnetic boo U1 changes 1. It has a speed change function.

The other ferromagnetic disk 26 performs the same operation as described above even when it is not included.

FIG. 26 shows a thirteenth embodiment, in which two magnetic pulleys 1 having the same structure as in each of the above embodiments are used like a so-called bevel gear, and the rest is the same as in the above second embodiment. .

"Effects of the Invention" As described above, according to the friction transmission method using magnets and its device according to the present invention, frictional resistance for power transmission is obtained by using attraction force by magnetism. , it is possible to freely set the slip value between the transmission members against overload by changing the strength of the magnetic force,
There is no backlash and no gear vibration occurs as with conventional gears. Furthermore, compared to conventional systems in which the friction of poles, etc. interposed between transmission members, or frictional resistance, is adjusted using pressing members such as springs, the structure does not become complicated, and vibrations do not occur during high-speed drive. Nor. In addition, the control position of the rotation angle and the like can be determined extremely accurately, which is very convenient for use.

[Brief explanation of drawings]

The drawings show an embodiment of the friction transmission method using magnets and its device according to the present invention, FIG. 1 is a side view of the device showing the first embodiment, FIG. 2 is a longitudinal sectional view of FIG. 1, and FIG. 5 to 5 are structural diagrams showing modifications of the apparatus shown in FIGS. 1 and 2,
FIG. 6 is a configuration diagram of the device showing the second embodiment, and FIG.
8 is a configuration diagram of an apparatus showing a third embodiment, FIG. 9 is a configuration diagram of an apparatus showing a fourth embodiment,
10 to 14 are configuration diagrams of the device showing a modification of FIG. 9, FIG. 15 is a configuration diagram of the device showing the fifth embodiment, and FIG.
FIG. 6 is a configuration diagram of the device showing the sixth embodiment, and FIG. 17 is the first embodiment.
A configuration diagram showing a modification of the device shown in FIG. 6, and FIG.
19 and 20 are configuration diagrams showing a modification of the apparatus shown in FIG. 18, FIG. 21 is a configuration diagram of the apparatus showing the eighth embodiment, and FIG. FIG. 23 is a configuration diagram of the device showing the 9th embodiment, FIG. 23 is a configuration diagram of the device showing the 10th embodiment, FIG. 24 is a configuration diagram of the device showing the 11th embodiment, and FIG. Block diagram of the device shown, No. 26
The figure is a configuration diagram of an apparatus showing a thirteenth embodiment. 1...Magnetic pulley 2.9...Rail 3.12
... Magnet 4.5.10.11 ... Magnetic pole plate 14 ... Rotating pulley 16 ... Cylinder 18 ...
・Spring 20... Ferromagnetic pole plate 22... Curved roller 24... Cone roller 25.26... Ferromagnetic disc Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 9 Figure 17 Figure 15 Figure 18 Figure 19 Figure 2σ

Claims (9)

[Claims] (1) When receiving a passive body and transmitting power, a magnetic force is applied to the driving roll, and the passive body is attracted to the driving roll by the magnetic force, and the power is transmitted by the frictional holding force. A friction transmission method using a magnet, which is characterized by: (2) The diameter of the drive roll is changed in each part, and the drive roll is magnetically attracted to the circumferential surface where the diameter of the drive roll changes so that the drive roll can be repositioned, thereby transmitting power. A friction transmission method using a magnet according to claim (1). (3) The driving roll that receives the passive body and transmits power is composed of a disk-shaped magnet and a ferromagnetic plate attached to the magnet, and the passive body is formed of a ferromagnetic material. Friction transmission device that uses magnets. (4) The passive body according to claim (3), characterized in that it is formed into a roll shape and includes a polar magnet that attracts the magnet of the driving roll, and a ferromagnetic plate attached to the magnet. Friction transmission device that uses magnets. (5) The friction transmission device using magnets according to claim (3), wherein the driving roll is formed by alternately layering a plurality of magnets and ferromagnetic plates. (6) The friction transmission device using magnets according to claim (4), wherein the circumferential surface of the drive roll, which has different roll diameters at each portion, attracts the passive roll magnetically so as to be repositionable. (7) The friction transmission device using magnets according to claim (4), wherein the passive roll is formed by alternately layering a plurality of magnets and ferromagnetic plates. (8) The magnet according to claim (4), wherein the passive roll has a threaded portion that is attracted by the magnet of the driving roll, and is arranged to be rotatable and movable in the thrust direction. Utilize friction transmission. (9) The circumferential surface of a passive roll is magnetically attracted to the end surface of the driving roll in a repositionable manner, and a second
5. The friction transmission device using a magnet according to claim 4, wherein the end face of the passive roll is attracted by magnetic force.