JPH059184U - Eddy current coupling device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an eddy current coupling capable of easily and accurately adjusting the transmission torque. In an eddy current coupling, an adjustment flat plate having a predetermined magnetic property, which has an opening of a predetermined shape, is provided on a permanent magnet of a first plate on the driving side, and the permanent magnet and the adjustment flat plate are provided. It was configured to adjust the mounting position on the circumference of.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention is applied in various film or thin wire processing or processing processes. In the mechanism that requires tension such as unwinding or winding operation, Transfers the torque required to obtain a predetermined tension from a rotary drive machine such as Eddy current coupling, especially the transmission torque can be easily adjusted according to the purpose. Relates to adjustable eddy current couplings.

[0002]

[Prior art]

  For tension control, powder clutches and hysteresis type clutches are used. Eddy current couplings of simple construction can be used to control small tensions. It   The conventional eddy current coupling has a structure as shown in FIGS.   FIG. 6 is an upper half sectional view of a conventional eddy current coupling viewed from the side. In Figure 6 2 is the drive side mechanism of this eddy current coupling, The first rotating plate 3, which is a rotor, is connected to the input shaft 4. Also, 5 is this vortex The driven side mechanism of the current coupling, which is for the surface of the first rotating plate 3 A second rotating plate, which is a driven-side rotating plate, is separated by a gap GP having a predetermined size in the axial direction. The rolling plate 6 is connected to the output shaft 7.   A plurality of permanent magnets 8 are provided on the first rotating plate 3 via a magnetic member 9. On the rotating plate 3 of No. 1, S poles and N poles are alternately arranged facing the surface. It   The second rotating plate 6 is made of a magnetic material, and is opposed to the permanent magnet 8. A conductive flat plate 11 made of a conductive material is attached to the facing position.   FIG. 7 shows the surface of the first rotary plate 3 viewed in the direction of arrow AA in FIG. Therefore, FIG. 8 is an enlarged cross-sectional view of FIG. 6 developed in the direction of arrow BB. Figure 7 In FIG. 8, 8N1 is a permanent magnet whose facing surface to the second rotating plate 6 is an N pole, 8S1 is a permanent magnet having an S pole on the surface facing the second rotary plate 6, The pair of permanent magnets 8 consisting of N and S poles is shown.   Although only a pair of permanent magnets is shown in FIGS. 7 and 8, a plurality of permanent magnets The surface of the rolling plate 3 is circumferentially surrounded and arranged as shown by 8n.   With the configuration described above, the magnetic flux Φ by the pair of permanent magnets 8N1 and 8S1 is Permanent magnet 8N1, gap GP, conductive flat plate 11, magnetic material of the second rotating plate 6 Section, conductive plate 11, gap GP to permanent magnet 8S1, magnetic member 9, permanent magnet Cycles with stone 8S1.   The magnetic flux Φ that penetrates the conductive flat plate 11 generates an eddy current EC in the conductive flat plate 11. Let   Therefore, when the drive side mechanism 2 is rotated in the desired direction by the rotating shaft 4, the above-mentioned magnetic The driven side mechanism 5 is also driven and rotated by the interaction between the bundle Φ and the eddy current EC.

[0003]

[Problems to be solved by the device]

  By the way, according to the structure described above, the conventional eddy current coupling is In order to adjust the torque according to the application without adjusting means, the phase on the drive side and the driven side must be adjusted. It is necessary to adjust the pair rotation speed. The transmission torque is changed by the eddy current coupling itself. When trying to do so, the permanent magnet surface of the first rotating plate or the second rotating plate Cutting the conductor surface of the first rotating plate or the second rotating plate By devising the method of fixing each to the rotating shaft, the first rotating plate and the second rotating plate It is necessary to be able to change the gap with the rotating plate of. These means However, all of them had a problem that they were difficult to adjust with high accuracy.   The present invention solves the above-mentioned problems, and easily and accurately adjusts the transmission torque. The challenge is to obtain an eddy current coupling that can

[0004]

[Means for Solving the Problems]

  In order to solve the above problems, in the eddy current coupling in the present invention, The permanent magnet arranged on the magnetic member of the first rotating plate on the moving side has a predetermined shape. An adjusting flat plate having a predetermined magnetic characteristic having an aperture is provided, and the permanent magnet and the adjusting plate are adjusted. The relative position to the flat plate was set so as to be rotationally moved.   To make the relative position between the permanent magnet and the adjustment flat plate rotate and move, The plate is fixed to the first rotating plate, and the plate is attached to the opposite surface of the magnetic member on which the permanent magnet is arranged. Arc attached to the first rotary plate body to which the magnetic member is attached It is effective to move the bolt along an elliptical circle. Also, a permanent magnet It is also possible to rotate the adjusting plate which is fixed and provided with the openings.

[0005]

[Action]

  As mentioned above, the eddy current coupling based on the present invention is The magnetic flux from the permanent magnet through the conductive flat plate placed on the second rotating plate is adjusted It leaks to the board and decreases. By rotating the relative position of the permanent magnet and the adjustment plate Therefore, the relative position between the permanent magnet and the aperture provided in this adjusting plate changes, and The bundle can change. Therefore, the magnetic flux penetrating the conductive plate can be controlled arbitrarily, The torque that can be transmitted by this eddy current coupling can be set arbitrarily and appropriately. I can.   To rotate and move the relative position between the permanent magnet and the adjustment plate, fix the adjustment plate. ， Mount the bolt that is fixed to the magnetic member on which the permanent magnet is arranged, to the magnetic member. It moves along the arc-shaped ellipse provided on the first rotating plate body By fixing it, the permanent magnet and the hole in this adjustment plate can be easily and reliably The pair position can be changed. Also, fix the permanent magnet and rotate the adjustment plate. Even if it makes it possible, the same effect can be obtained.

[0006]

【Example】

  First embodiment:   Next, a first embodiment of the eddy current coupling according to the present invention will be described with reference to FIGS. A detailed description will be given with reference.   FIG. 1 is a side view of an upper half of a side view of an eddy current coupling 1 according to the present invention. It   In FIG. 1, reference numeral 2 denotes a drive side mechanism of the eddy current coupling 1, which is a drive side mechanism. A first rotating plate 3, which is a rotating plate, is connected to the input shaft 4. Also, 5 is a driven side mechanism of this eddy current coupling 1, The driven side rotating plate is separated from the surface by an axial gap GP of a predetermined size. A second rotating plate 6 is connected to the output shaft 7.   A plurality of permanent magnets 8 are provided on the first rotating plate 3 as described later in detail. On the magnetic member 9 formed by the magnetic member mounted on the first rotating plate 3. It is installed in. The surface of the permanent magnet 8 is molded with a magnetic material, the details of which will be described later. An adjustment flat plate 10 having a predetermined opening is attached.   A plurality of bolts 1 are mounted on the back surface of the magnetic member 9 on which the permanent magnets 8 are mounted at predetermined intervals. 2 is stuck.   The first rotating plate 3 corresponds to the bolt 12 so as to fix the magnetic member 9. The elliptical hole 13 is provided at the position where the bolt 12 is fitted into the hole 13. By tightening and fixing the nut 14, the permanent magnet is attached to the first rotating plate 3. The magnetic member 9 having the stone 8 attached thereto is fixed.   The second rotating plate 6 is made of a magnetic material and is located at a position facing the permanent magnet 8. A conductive flat plate 11 molded of a conductor is attached to the.   FIG. 2 shows the surface of the first rotary plate 3 viewed in the direction of arrow AA in FIG. ing. In FIG. 2, 8N1 has a surface facing the second rotating plate 6 which is an N pole. The permanent magnet 8S1 is a permanent magnet whose surface facing the second rotary plate 6 has an S pole.   Although only a pair of permanent magnets is shown in FIG. The surface of the rolling plate 3 is circumferentially surrounded and arranged as shown by 8n.   The surface of this permanent magnet 8 is molded with a magnetic material into a predetermined shape and thickness, A predetermined number of openings 10a having a fixed shape and size are provided, and a fixing protrusion 10 is provided on the periphery. The adjustment flat plate 10 provided with a predetermined number of b is attached to the first rotary plate 3 by the bolt 10c. It is fixed.

[0007]   Next, the operation of the eddy current coupling 1 in the above structure will be explained with reference to FIG. Reveal FIG. 3 is an enlarged cross-sectional view of FIG. 1 developed in the direction of arrow BB. Facing the second rotary plate 6 on the magnetic member 9 mounted on the rotary plate 3 of FIG. And the surface facing the second rotating plate 6 is the S pole. The permanent magnets 8S1 are arranged in pairs, and the adjustment flat plate 10 is described above on the surface of the permanent magnets of this pair. It is fixed as shown.   A predetermined axial gap GP is provided on the surface of the adjusting flat plate 10 to guide it to the surface. A second rotating plate 6 having an electrically conductive flat plate 11 mounted thereon is configured.   Therefore, all the magnetic flux Φ due to the pair of permanent magnets 8N1 and 8S1 is generated by the magnetic member 9. Although it passes, the adjustment flat plate 10 causes leakage flux Φ1 flowing through the adjustment flat plate 10 , Flows from the gap GP through the conductive flat plate 11 to the second rotary plate 6 and again The magnetic flux Φ2 that penetrates the conductive flat plate 11 and returns from the gap GP to the permanent magnet 8 is separated. Be done.   The magnetic flux Φ2 that penetrates the conductive plate 11 generates an eddy current EC in the conductive plate 11. Therefore, when the drive side mechanism 2 is rotated by the rotating shaft 4 in a desired direction, the magnetic flux Φ The driven side mechanism 5 is driven to rotate by the interaction between 2 and this eddy current EC.   The torque transmitted to the driven mechanism 5 is proportional to the magnetic flux Φ2, and the overall magnetic flux Φ is constant. Therefore, it can be adjusted by changing the magnetic flux φ1 leaking to the adjustment plate 10. You can   The change of the magnetic flux Φ1 leaking to the adjusting plate 10 is caused by the opening 10a provided in the adjusting plate 10. This can be achieved by changing the overlapping position of the and the permanent magnet 8 surface.   That is, the above-mentioned ratio of the leakage magnetic flux Φ1 and the magnetic flux Φ2 is equal to The magnetic member 9 is loosened by loosening the nut 14 for tightening the bolt 12 provided on the elastic member 9. The structural dimensions of this eddy current coupling 1 can be changed by changing the mounting position on the circumference of And the size and position of the opening 10a of the adjusting plate 10 and the cross-sectional shape of the permanent magnet 8 and its It can be adjusted according to the dimensions. Therefore, to obtain the desired transmission torque. You can

[0008]   Second embodiment:   Next, a second embodiment will be described with reference to FIGS.   4 is a diagram corresponding to the first embodiment shown in FIG. 1, and FIG. 5 is an arrow in FIG. The figure seen from the view AA is shown. In the second embodiment, the permanent magnet 8 is mounted in the first embodiment. Rotate the magnetic member 9 and fix it in place with bolts 12 and nuts 14. By doing so, the permanent magnet 8 is rotationally moved, while the second embodiment is Is mounted on the circumference of the adjusting plate 20 by a friction wheel 15 that contacts the circumference of the adjusting plate 9. The position is adjusted.   The reference numerals used in FIGS. 4 and 5 refer to the adjustment flat plate 20 provided with the apertures 20a for the first rotation. The first rotary plate 3 is installed so as to be rotatably held with respect to the rotary plate 3. 1 to 3 except for the groove 3a and the friction wheel 15.

[0009]   The above description describes two embodiments of the present invention, and other applications It can be modified.   For example, the nut for fixing the adjusting plate in the first embodiment is illustrated as a double nut. However, in addition to using wing nuts for the above nuts, etc., rotate the permanent magnet or adjustment plate. In addition to the above-described embodiment, the means for making it possible can be freely set.   In addition, the transmission torque corresponding to the change in the relative position between the permanent magnet and the hole provided in the adjustment flat plate. In order to obtain the desired characteristics of the change of the Luk, the cross-sectional shape and adjustment of the permanent magnet should be adjusted. The shape of the opening provided on the flat plate is appropriate for the relative rotation angle between the permanent magnet and the adjustment flat plate. You can set it to off.

[0010]

[Effect of device]

  As mentioned above, in the eddy current coupling of the present invention, the second rotation from the permanent magnet is performed. The magnetic flux penetrating the conductive flat plate placed on the plate leaks to the adjusting flat plate by the desired amount and decreases. Since it is configured as described above, it has excellent effects as described below. By rotating the relative position between the permanent magnet and the adjustment flat plate, The relative position to the aperture provided in the adjustment plate changes, and the above-mentioned reduced magnetic flux can be changed. The torque that can be transmitted by this eddy current coupling can be adjusted arbitrarily. In this case, the permanent magnet is used to rotationally move the relative position between the permanent magnet and the magnetic flat plate. A circular arc provided on the first rotating plate body with a bolt fixed to the magnetic member Fixed along with the permanent magnet by moving along the oval The relative position with respect to the aperture provided in the adjusting flat plate can be easily and surely changed. Furthermore, if the permanent magnet is fixed and the adjustment plate is rotated, the adjustment plate will be Since it continuously rotates, the transmission torque can be continuously adjusted. As described above, according to the present invention, the transmission torque can be adjusted with high accuracy by a simple operation. Therefore, the desired tension required by the load can be easily obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a first embodiment of an eddy current coupling according to the present invention.

FIG. 2 is a side view of the first rotating plate as viewed in the direction of arrow AA in FIG.

FIG. 3 is an enlarged cross-sectional view of the essential portions of the eddy current coupling shown in FIG. 1, showing the relationship between the first rotary plate and the second rotary plate as viewed in the direction of arrow BB.

FIG. 4 is a vertical sectional front view of a second embodiment of the eddy current coupling according to the present invention.

5 is a side view of the first rotating plate as viewed in the direction of arrow AA in FIG.

FIG. 6 is a vertical front view of a half portion of a conventional eddy current coupling.

FIG. 7 is a side view of the first rotating plate as viewed in the direction of arrow AA in FIG.

FIG. 8 is an expanded cross-sectional view of essential parts showing the relationship between the first rotating plate and the second rotating plate as viewed in the direction of arrow BB in FIG.

[Explanation of symbols]

1: Eddy current coupling 2: Drive side mechanism 3,6: Rotating plate 5: Driven side mechanism 8: Permanent magnet 9: Magnetic member 10, 20: Adjustment plate 11: conductive flat plate 12: bolt 13: Open hole 14: Nut 15: Friction car

Claims (3)

[Scope of utility model registration request] 1. A first rotating plate provided with a magnetic body member in which permanent magnets of N poles and S poles are alternately arranged toward the surface of a circular rotating body formed of a magnetic body, and a magnetic body. A second rotary plate having a conductive flat plate disposed on the surface of the circular rotary member so as to face the permanent magnet;
In the eddy current coupling configured by providing a predetermined gap between the rotating plate of the first rotating plate and the first rotating plate, a predetermined shape in which an opening of a predetermined shape is provided on the permanent magnet of the first rotating plate is provided. An eddy current coupling device, characterized in that an adjusting flat plate having magnetic characteristics is provided and the relative position between the permanent magnet and the adjusting flat plate is formed so as to rotate and move. 2. In order to rotationally move the relative position between the permanent magnet and the adjusting flat plate, the adjusting flat plate is fixed to the first rotating plate, and the permanent magnet is arranged in the magnetic member in which the permanent magnet is arranged. A bolt having a predetermined size is fixed to the opposite surface, and the bolt is moved along an arc-shaped ellipse provided on the first rotating plate body on which the magnetic member is mounted and fixed by a nut at a predetermined position. The eddy current coupling device according to claim 1, wherein 3. In order to rotate the relative position between the permanent magnet and the adjusting flat plate so as to rotate, an adjustment having a predetermined magnetic characteristic by providing an opening of a predetermined shape on the permanent magnet of the first rotating plate. The eddy current coupling device according to claim 1, wherein the flat plate is configured to rotate.