JP2008309265A - Electromagnetic coupling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic coupling device capable of providing the possible largest torque with a simple constitution. <P>SOLUTION: This electromagnetic coupling device has a rotor 3 and an armature 4 having mutually oppositely arranged opposed surfaces 3a and 4a, respectively, and a coil 8 for generating a magnetic flux for mutually attracting the opposed surface 3a of the rotor 3 and the opposed surface 4a of the armature 4, and is characterized in that rotor side magnetic flux cutoff parts 19 and 20 and rotor side friction surfaces 33 and 34 partitioned into a plurality in the radial direction by the rotor side magnetic flux cutoff parts 19 and 20, are arranged in an inner area in the radial direction of the rotor 3 among the opposed surface 3a of the rotor 3, and the rotor 3 has preset elasticity so that the rotor side friction surfaces 33 and 34 contact by following the opposed surface 4a of the armature 4 when deflecting to the armature 4 side by a magnetic flux of the coil 8. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electromagnetic coupling device that transmits and interrupts torque from a main drive side to a driven side by electromagnetic action.

2. Description of the Related Art Conventionally, an electromagnetic coupling device has been used to transmit and block torque from a main driving side that is a power source to a driven side (see, for example, Patent Document 1).
An electromagnetic coupling device is generally provided with a rotor fixed to a shaft, an amateur disposed opposite to the rotor, and a coil for generating magnetic flux. Then, the coil is energized and the rotor is attracted to the rotor by the magnetic flux generated from the coil, or the energization is released and the rotor and the amateur are separated to transmit / cut off the torque. .

Here, in order to increase the transmitted torque as much as possible, the following two configurations are conceivable.
One is a configuration in which when the coil is energized, only the outer edge portion of each friction surface between the rotor and the armature is brought into contact with the other inner region. That is, by providing a gap (clearance) between the inner regions during energization, the overall torque radius is increased as much as possible. Thereby, the whole torque can be increased.

Second, when the coil is energized, the friction surfaces of the rotor and the amateur are all brought into contact with each other, not only the outer edge. That is, the magnetic resistance is reduced as much as possible by eliminating the gap between the inner regions during energization. As a result, the overall torque radius is reduced, but the overall magnetic flux is increased. Thereby, the whole torque can be increased.
JP 2004-52985 A

However, in the two configurations as described above, there is a problem that individual differences such as contact or non-contact of the respective inner regions occur when the coil is energized due to a manufacturing error of the rotor or the amateur. is there.
Furthermore, in order to reduce the manufacturing error as much as possible, it is conceivable to process the rotor or the armature with high accuracy, but there is a problem that the manufacturing cost increases as the processing accuracy increases.

  This invention is made | formed in view of such a situation, Comprising: It aims at providing the electromagnetic coupling device which can obtain as much torque as possible by simple structure.

In order to solve the above problems, the present invention provides the following means.
According to the present invention, a rotor and an amateur each having opposing surfaces arranged opposite to each other, and a magnetic flux for adsorbing the opposing surface of the rotor and the opposing surface of the amateur to each other when a predetermined current is applied. A rotor-side magnetic flux blocking portion that blocks a magnetic flux in the radial direction of the rotor, and a rotor-side magnetic flux blocking portion in an inner region in the radial direction of the rotor of the opposing surface of the rotor. A rotor-side friction surface divided into a plurality of portions in the radial direction by a portion, and when the rotor bends to the armature side by the magnetic flux of the coil, the rotor-side friction surface becomes a surface facing the armature. It has the elasticity preset so that it may touch, and it is characterized by the above-mentioned.

In the present invention, when a predetermined current is applied to the coil, a magnetic flux is generated, and the opposing surfaces of the rotor and the amateur are attracted to each other by this magnetic flux.
At this time, even if a gap is partially generated between the facing surfaces due to manufacturing errors, the rotor has a predetermined elasticity, so that the rotor-side friction surface becomes the facing surface of the amateur. Touch.
Accordingly, when a predetermined current is applied to the coil, the rotor-side friction surface and the amateur facing surface can be reliably brought into contact with each other.

  Further, according to the present invention, there are provided a plurality of the rotor-side magnetic flux blocking portions in the radial direction of the rotor, and an amateur side that blocks the magnetic flux in the radial direction of the amateur in an inner region of the facing surface of the amateur A plurality of magnetic flux blocking portions are provided in the circumferential direction, and the rotor side magnetic flux blocking portions and the armature side magnetic flux blocking portions are alternately arranged in the radial direction.

  According to the present invention, since the rotor-side magnetic flux blocking portions and the amateur-side magnetic flux blocking portions are alternately arranged in the radial direction, the magnetic flux can be alternately passed in the radial direction of the rotor and the amateur, and the rotor The adsorption power between the armature and the amateur can be increased.

  In addition, the present invention provides a rotor and an armature each having opposing surfaces arranged opposite to each other, and applying a predetermined current to adsorb the opposing surface of the rotor and the opposing surface of the amateur to each other. A coil for generating a magnetic flux, and an armature-side magnetic flux blocking portion for blocking the magnetic flux in the radial direction of the armature in an inner region in the radial direction of the armature, of the opposing surface on the armature side, and the armature An armature-side friction surface divided into a plurality of portions in the radial direction by a side magnetic flux blocking portion, and when the armature is bent toward the rotor by the magnetic flux of the coil, the armature-side friction surface is opposed to the rotor. It is characterized by having elasticity set in advance so as to follow the surface.

In the present invention, when a predetermined current is applied to the coil, a magnetic flux is generated, and the opposing surfaces of the rotor and the amateur are attracted to each other by this magnetic flux.
At this time, even if there is a gap between the opposing surfaces due to manufacturing errors, the amateur has a predetermined elasticity, so that the amateur friction surface becomes the opposing surface of the rotor. Touch.
Thus, when a predetermined current is applied to the coil, the armature-side friction surface and the opposing surface of the rotor can be reliably brought into contact with each other.

  Further, in the present invention, a plurality of rotor-side magnetic flux blocking portions that block the magnetic flux in the radial direction of the rotor are provided in the inner region of the opposed surface of the rotor in the circumferential direction of the rotor, A plurality of magnetic flux blocking portions are provided in the radial direction of the amateur, and the rotor side magnetic flux blocking portions and the amateur side magnetic flux blocking portions are alternately arranged in the radial direction.

  According to the present invention, since the rotor-side magnetic flux blocking portions and the amateur-side magnetic flux blocking portions are alternately arranged in the radial direction, the magnetic flux can be alternately passed in the radial direction of the rotor and the amateur, and the rotor The adsorption power between the armature and the amateur can be increased.

  Further, the present invention is characterized in that at least one of the rotor-side magnetic flux blocking section and the armature-side magnetic flux blocking section is provided in at least three in the circumferential direction of the rotor or the amateur.

  According to this invention, since at least one of the rotor-side magnetic flux blocking portion and the amateur-side magnetic flux blocking portion is provided in the circumferential direction of the rotor or the amateur, the inner region of the rotor or the amateur Can be made uniform in the circumferential direction. Thereby, a rotor and an amateur can be made to contact reliably.

  Further, the present invention is characterized in that at least one of the rotor-side magnetic flux blocking section and the amateur-side magnetic flux blocking section is arranged at equal intervals in the circumferential direction of the rotor or the amateur.

According to the present invention, since at least one of the rotor-side magnetic flux blocking section and the amateur-side magnetic flux blocking section is arranged at equal intervals in the circumferential direction of the rotor or the amateur, the inner area of the rotor or the amateur Can be made more uniform in the circumferential direction. Thereby, a rotor and an amateur can be made to contact reliably.

  According to the present invention, when the coils are energized, the opposing surfaces can be reliably brought into contact with each other, so that a larger torque can be easily obtained with a simple configuration. In addition, since the processing accuracy may be low, the cost is reduced.

(Embodiment 1)
Hereinafter, an electromagnetic coupling device according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows an example in which the electromagnetic coupling device according to the first embodiment of the present invention is applied to an electromagnetic clutch, and is a sectional view showing only a half side of an axis.

As shown in FIG. 1, the electromagnetic clutch 1 includes a fixed portion 2 formed in a substantially cylindrical shape, a rotor 3 supported so as to be rotatable with respect to the fixed portion 2, and a substantially disk-shaped armature 4. I have.
The fixed portion 2, the rotor 3, and the armature 4 are made of a magnetic member.
The fixing portion 2 is formed with a recess 7 extending over the entire length in the circumferential direction and sinking from the rear end toward the front end. The recess 7 is provided with a coil 8 that generates a magnetomotive force when energized.

  The rotor 3 includes a disk-shaped base portion 12. The outer edge 18 of the base 12 is provided with a side wall 13 that is raised from the entire circumference of the outer edge 18. A cylindrical shaft portion 14 extending in parallel with the side wall portion 13 is provided at the center portion of the base portion 12. The rotor 3 is supported so as to be rotatable about the axis L extending in the length direction of the shaft portion 14 with respect to the fixing portion 2 by inserting the shaft portion 14 into the cylindrical hole 2 a of the fixing portion 2. Yes.

Further, as shown in FIG. 2, in the base region 12, the inner region 23 on the radially inner side (axial center side, center side) of the outer edge portion 18 along the circumferential direction of the base portion 12. An extended outer peripheral long hole (rotor side magnetic flux blocking part) 19 and an inner peripheral long hole (rotor side magnetic flux blocking part) 20 are formed. The outer circumferential long hole 19 is formed on the radially outer side (outer edge portion 18 side), and the inner circumferential long hole 20 is formed on the radially inner side (axial center side, shaft portion 14 side). . In addition, the outer peripheral long hole 19 and the inner peripheral long hole 20 are formed with a uniform interval in the circumferential direction. That is, the connection region 19a provided between the circumferential long holes 19 and the connection region 20a provided between the circumferential long holes 20 are adjacent to each other in the circumferential direction. It is arranged at an angle of 120 degrees.
Furthermore, the outer peripheral long hole 19 and the inner peripheral long hole 20 are alternately shifted in the circumferential direction. That is, the connection area 19a and the connection area 20a are not arranged on a straight line extending in the radial direction of the base portion 12, but are shifted in the circumferential direction. Furthermore, the connection region 20 a is disposed at a position facing the central portion in the circumferential direction of the outer peripheral long hole 19.

  The inner region 23 is divided into a plurality of portions in the radial direction of the base portion 12 by the outer peripheral long hole 19 and the inner peripheral long hole 20. Of these divided regions, the region between the outer peripheral long hole 19 and the inner peripheral long hole 20 in the radial direction is a rotor side outer peripheral friction surface (rotor side friction surface) 33, and the outer peripheral surface of the shaft portion 14 in the radial direction. And the inner peripheral long hole 20 is referred to as a rotor side inner peripheral friction surface (rotor side friction surface) 34.

  As shown in FIG. 1, one main surface (opposing surface) 4 a of the armature 4 is disposed opposite to the bottom surface (opposing surface) 3 a of the rotor 3, and the armature 4 is axially disposed with respect to the rotor 3. It is supported so as to be movable in the direction of approaching and separating in the L direction. Note that a biasing member (not shown) is attached to the armature 4, and the armature 4 is always biased in a direction away from the rotor 3. Therefore, in a natural state where the coil 8 is not energized, the armature 4 is not in contact with the rotor 3. The urging member may not be provided.

As shown in FIG. 3, a circular opening 28 is formed at the center of the armature 4. Further, in the inner region 30 on the inner side (center side) in the radial direction from the outer edge portion 25 of the armature 4, there is an armature side long hole (amateur side magnetic flux blocking portion) 29 extending along the circumferential direction of the armature 4. Is formed. Three amateur side long holes 29 are formed at equal intervals in the circumferential direction.
Further, the inner region 30 is divided into a plurality in the radial direction of the amateur 4 by the amateur side long holes 29. Of these divided areas, an area between the outer edge 25 in the radial direction and the amateur side long hole 29 is an amateur side outer peripheral friction surface (an amateur side friction surface) 37, and the amateur side long hole 29 and the opening in the radial direction are opened. A region between the portions 28 is referred to as an amateur-side inner peripheral friction surface (an amateur-side friction surface) 38.

  Under such a configuration, when one of the main surface 4a and the bottom surface 3a are arranged to face each other and the armature 4 and the rotor 3 are arranged coaxially with each other, as shown in FIG. The side long holes 29 and the inner peripheral long holes 20 are arranged alternately in the radial direction of the armature 4 and the rotor 3 so as not to overlap. That is, the outer peripheral long hole 19, the armature side long hole 29, and the inner peripheral long hole 20 are arranged in this order from the radially outer side to the inner side.

  Furthermore, as shown in FIG. 1, when the base portion 12 in the present embodiment causes a predetermined current to flow through the coil 8 to generate a suction force between the bottom surface 3 a and the one main surface 4 a, the inner region 23. Has such elasticity that it bends (elastically deforms) toward the amateur 4 side. That is, when a predetermined current is passed through the coil 8, the one main surface 4a and the bottom surface 3a come into contact with each other, and as shown in FIG. 5, temporarily between the one main surface 4a and the bottom surface 3a. Even if a gap is generated, the inner region 23 bends toward the armature 4 side, so that the entire rotor side outer peripheral friction surface 33 and the rotor side inner peripheral friction surface 34 (all friction surfaces) The main surface 4a is contacted without a gap. That is, the elasticity of the rotor 3 is set in advance in consideration of the shape, material, hardness, current magnitude of the coil 8 and the like of the rotor 3 and the armature 4. Specifically, the rotor side outer peripheral friction surface 33 straddles the amateur side long hole 29 and contacts the armature side outer peripheral friction surface 37 and the amateur side inner peripheral friction surface 38, and the rotor side inner peripheral friction surface 34 is It contacts the amateur side inner friction surface 38. At this time, the rotor-side outer peripheral friction surface 33 and the rotor-side inner peripheral friction surface 34 are in close contact with the one main surface 4a of the armature 4 without a gap so that the rotor-side outer peripheral friction surface 33 and the rotor-side inner peripheral friction surface 34 are in contact with each other. A taper may be provided in advance.

Next, the operation of the electromagnetic clutch 1 in the present embodiment configured as described above will be described.
First, the main machine is driven, and the rotor 3 is rotated about the axis L. At this time, since the armature 4 connected to the driven device side is not in contact with the rotor 3, the torque from the driven device is not transmitted to the driven device side.
When a predetermined current is passed through the coil 8 from this state, a magnetomotive force is generated by the coil 8. Therefore, a magnetic flux is generated around the coil 8. In FIG. 6, a symbol M indicates a loop of the magnetic flux.

The magnetic flux will be described with reference to FIG.
For example, the magnetic flux passes from the starting point S1 of the fixed portion 2 to the side wall portion 13 and the base portion 12 of the rotor 3. In the base portion 12, the magnetic resistance is transmitted to the armature 4 because the radially inner magnetic resistance is increased by the outer peripheral long hole 19. This magnetic flux travels inward in the radial direction from the armature 4, but since the armature side long hole 29 is provided, the magnetic flux breaks to the rotor 3 side at a point S 2 before the armature side long hole 29. It is transmitted to the rotor side outer peripheral friction surface 33. In the rotor side outer peripheral friction surface 33, the magnetic flux goes inward in the radial direction. However, since the inner peripheral long hole 20 is provided, it is folded to the amateur 4 side at the point S3 before the inner peripheral long hole 20, and again the amateur. It is transmitted to 4. Then, the magnetic flux travels radially inward from the armature 4 and is transmitted from the inner edge portion of the armature 4 to the inner edge portion S4 of the rotor side inner peripheral friction surface 34. Further, it travels from the inner edge portion S4 through the shaft portion 14 to the point S5 of the fixed portion 2. Then, it proceeds through the fixed portion 2 and returns to the start point S1. As a result, a magnetic flux loop M is obtained.

  A space between the bottom surface 3a and one main surface 4a through which the magnetic flux passes is a magnetic pole. That is, the first magnetic pole M1, the second magnetic pole M2, the third magnetic pole M3, and the fourth magnetic pole M4 are formed from the radially outer side to the inner side. Thereby, a suction force is generated between the bottom surface 3a and the one main surface 4a. Therefore, the armature 4 moves in the direction of the axis L toward the rotor 3 against the biasing force of a biasing member (not shown). And one main surface 4a contacts bottom surface 3a. Thereby, the rotor 3 and the armature 4 are locked, and the armature 4 rotates around the axis L. And the torque by rotation of this amateur 4 is transmitted to a follower apparatus.

On the other hand, when energization of the coil 8 is stopped, the magnetic flux disappears and the lock between the rotor 3 and the armature 4 is released. Therefore, the armature 4 moves in a direction away from the rotor 3 by the urging force of the urging member, whereby the torque from the main driving device is interrupted.
In this way, by turning on / off the energization of the coil 8, torque transmission / interruption from the main driving device to the driven device is performed.
When there is no urging member, when energization of the coil 8 is stopped, the rotor 3 and the armature 4 are unlocked, and even if a part of each other is in contact, torque from the main driving device is not transmitted. Rotate only on the drive side. Thereby, the torque from the main machine is interrupted.

In the present embodiment, when a predetermined current is passed through the coil 8, one main surface 4 a of the armature 4 comes into contact with the bottom surface 3 a of the rotor 3 by an attractive force due to the magnetic flux. Here, a gap may partially occur between the one main surface 4a and the bottom surface 3a due to a manufacturing error of the amateur 4 or the rotor 3. Even in this case, since the base portion 12 has a predetermined elasticity set in advance, the rotor-side outer peripheral friction surface 33 straddles the amateur-side long hole 29 and the amateur-side outer peripheral friction surface 37 and the amateur-side inner surface. It contacts the circumferential friction surface 38 without a gap. Further, the rotor-side inner peripheral friction surface 34 contacts the amateur-side inner peripheral friction surface 38 without a gap.
Therefore, the gap between the bottom surface 3a of the rotor 3 and one main surface 4a of the armature 4 is eliminated, and the magnetic resistance is reduced. Therefore, the overall magnetic flux increases, and as a result, the overall torque increases.

As described above, according to the electromagnetic clutch 1 of the present embodiment, since the base portion 12 is set to a predetermined elasticity in advance, the rotor-side outer peripheral friction surface 33 and the rotor-side inner peripheral friction surface 34 are connected to one of the main clutches when energized. The surface 4a can be reliably brought into contact with. Therefore, a larger torque can be easily obtained with a simple configuration.
Further, since the outer peripheral long holes 19, the inner peripheral long holes 20, and the armature side long holes 29 are alternately arranged in the radial direction, not only the loop extending from the rotor 3 to the amateur 4 can be surely made, but also the radial direction The suction force can be increased over the whole.

(Embodiment 2)
Next, a second embodiment of the present invention will be described.
8 and 9 show a second embodiment of the present invention.
8 and 9, the same components as those shown in FIGS. 1 to 7 are denoted by the same reference numerals, and the description thereof is omitted.
This embodiment and the first embodiment have the same basic configuration, and only the differences will be described here.

  The armature 4 in the present embodiment has elasticity such that when a predetermined current is applied to the coil 8, the bottom surface 3 a comes into contact with the one main surface 4 a and the armature 4 is bent toward the rotor 3 side. That is, as shown in FIG. 9, even if there is a manufacturing error in the rotor 3 or the armature 4, the entire surface (all friction surfaces) of the armature side outer peripheral friction surface 37 and the armature side inner peripheral friction surface 38 are The elasticity of the armature 4 is set in advance so as to be in contact with the bottom surface 3a of the armature 3 in consideration of the shape, material and hardness of the rotor 3 and the armature 4, the magnitude of the current flowing through the coil 8, and the like. Specifically, the amateur-side outer peripheral friction surface 37 straddles the outer peripheral long hole 19 and contacts the outer edge 18 and the rotor-side outer peripheral friction surface 33, and the amateur-side inner peripheral friction surface 38 is connected to the inner peripheral long hole 20. The rotor side outer peripheral friction surface 33 and the rotor side inner peripheral friction surface 34 are in contact with each other. At this time, the armature side outer peripheral friction surface 37 and the armature side inner peripheral friction surface 38 are previously tapered so that the armature side outer peripheral friction surface 37 and the armature side inner peripheral friction surface 38 are in close contact with the bottom surface 3a of the rotor 3 without a gap. You may make it provide.

Thus, since the amateur 4 has a predetermined elasticity set in advance, even if there is a manufacturing error in the rotor 3 or the armature 4, the amateur side outer peripheral friction surface 37 and the amateur side inner peripheral friction surface 38 are energized. Sometimes it can be reliably brought into contact with the bottom surface 3a of the rotor 3.
As mentioned above, according to the electromagnetic clutch 1 in this embodiment, there can exist an effect similar to the said 1st Embodiment.

In the first and second embodiments, the numbers and positions of the outer peripheral long hole 19 and the inner peripheral long hole 20 in the circumferential direction and the radial direction can be changed as appropriate.
For example, as shown in FIG. 10, six outer peripheral long holes 19 and six inner peripheral long holes 20 may be provided. In this case, each installation angle of the connection areas 19a and 20a adjacent in the circumferential direction is 60 degrees. Thereby, the installation space | interval of connection area | region 19a, 20a can be made small, Therefore, the bending of the inner area | region 23 can be made uniform in the circumferential direction of the base part 12. FIG. Therefore, the inward region 23 can be reliably brought into close contact with the one main surface 4a. Note that the more the connection regions 19a and 20a are increased, the more uniform the bending of the inner region 23 is. However, when the connection regions 19a and 20a are increased, the leakage magnetic flux is increased. Therefore, the elasticity of the base portion 12 is set in advance so that the torque is maximized based on the relationship between the amount of deflection of the inner region 23 and the leakage magnetic flux. For example, the number of connecting regions 19a and 20a, the outer peripheral long hole 19, and the inner peripheral long hole 20 are set so as to maximize the torque as described above.

Further, it is preferable that six outer peripheral long holes 19 and six inner peripheral long holes 20 are provided, and the outer peripheral long holes 19 and the inner peripheral long holes 20 are arranged at equal intervals in the circumferential direction of the base portion 12. .
In addition, the number of the outer periphery long hole 19 and the inner periphery long hole 20 is not restricted to six, These installation numbers can be changed suitably and can provide at least three. It is particularly preferable that the number is 4 to 6.
Further, as shown in FIG. 12, a circumferential groove 40 that extends over the entire circumference in the circumferential direction of the rotor 3 may be provided. That is, you may provide the perimeter connection part 43 which connects the inner area | region 41 and the outer area | region 42 of the rotor 3 over a perimeter. The thickness dimension of the all-around connecting portion 43 is smaller than the thickness dimension of the inner region 41 and the outer region 42. Thereby, the circumferential groove 40 can be made to function as a rotor side magnetic flux interruption part, and also the bending of the inner area | region 41 can be made uniform in the circumferential direction. Therefore, when the amateur-side friction surface and the rotor-side friction surface are attracted by the attractive force due to the magnetic flux, the deformation state of the friction surface due to the attractive force is stabilized, and the torque characteristics can be improved. Moreover, the processing man-hour of the rotor 3 can be reduced.
The all-around connecting portion 43 may be formed integrally with the inner region 41 and the outer region 42 or may be provided as a separate member. Further, a magnetic flux blocking member may be provided in the circumferential groove 40. Further, the circumferential groove 40 and the entire circumferential connecting portion 43 may be provided in the amateur 4.

Moreover, in the said 1st and 2nd embodiment, the number of the circumferential direction of the armature side long hole 29 and the number of radial direction can be changed suitably.
For example, as shown in FIG. 11, six amateur side long holes 29 may be provided. In this case, each installation angle of the connection areas 29a adjacent in the circumferential direction is 60 degrees. Thereby, the installation space | interval of the connection area | region 29a can be made small, and the bending of the inner area | region 30 can be made uniform in the circumferential direction. Further, as described above, the elasticity of the armature 4 is set in advance so that the torque is maximized in relation to the amount of deflection of the inner region 30 and the leakage magnetic flux. For example, the number of connecting regions 29a and the armature side long holes 29 that provide the largest torque as described above are provided.

In addition, it is preferable that six amateur side long holes 29 are provided, and further, the amateur side long holes 29 are arranged at equal intervals in the circumferential direction.
The number of amateur side long holes 29 is not limited to six, and the number of installations can be changed as appropriate, and at least three can be provided. It is particularly preferable that the number is 4 to 6.
Moreover, although the electromagnetic clutch 1 has been described as an example of the electromagnetic coupling device, the electromagnetic coupling device is not limited to this and can be changed as appropriate. For example, the present invention can be applied to an electromagnetic brake as an electromagnetic coupling device.
Moreover, although the main drive device and the rotor 3 were connected and the driven device and the amateur 4 were connected, it is not restricted to this, You may provide a main drive device and a driven device reversely.
The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

It is a figure which shows 1st Embodiment of the electromagnetic coupling device which concerns on this invention, Comprising: It is sectional drawing which fractures | ruptures an electromagnetic coupling device in an axial direction and shows the half side of an axis. It is a top view which expands and shows the rotor of FIG. It is a top view which expands and shows the amateur of FIG. It is a top view which expands and shows a mode that the rotor and amateur of FIG. 1 were piled up. It is explanatory drawing which shows a mode that the rotor of FIG. 1 bent to the amateur side. It is explanatory drawing which shows the loop of the magnetic flux which passes along the fixing | fixed part, rotor, and amateur of FIG. It is explanatory drawing which shows a mode that the amateur of FIG. 6 moved to the rotor side, and the rotor bent to the amateur side. It is a figure which shows 2nd Embodiment of the electromagnetic coupling device which concerns on this invention, Comprising: It is sectional drawing which shows the part corresponding to FIG. It is explanatory drawing which shows a mode that the amateur of FIG. 8 moved to the rotor side and bent to the rotor side. It is a top view which shows the modification of the rotor of FIG. It is a top view which shows the modification of the amateur of FIG. It is a figure which shows the other modification of a rotor, Comprising: It is a perspective view which shows a mode that a part of circumferential direction was interrupted | blocked.

Explanation of symbols

1 Electromagnetic clutch (electromagnetic coupling device)
3 Rotor 3a Bottom (opposite surface)
4 Amateur 4a One main surface (opposite surface)
8 Coil 19 Perimeter long hole (rotor side magnetic flux block)
20 Inner perimeter long hole (rotor side magnetic flux block)
29 Amateur side slot (Amateur side magnetic flux block)
33 Rotor side outer peripheral friction surface (rotor side friction surface)
34 Rotor side inner peripheral friction surface (rotor side friction surface)
37 Amateur side outer friction surface (Amateur side friction surface)
38 Amateur side inner friction surface (Amateur side friction surface)

Claims (6)

A rotor and an amateur each having opposing surfaces arranged opposite to each other;
A coil that generates a magnetic flux for adsorbing the opposing surface of the rotor and the opposing surface of the amateur by applying a current of a predetermined value;
Of the opposed surfaces of the rotor, in the radially inner region of the rotor,
A rotor-side magnetic flux blocking section that blocks the radial magnetic flux of the rotor;
A rotor-side friction surface divided into a plurality of radial directions by the rotor-side magnetic flux shielding portion;
The electromagnetic coupling device according to claim 1, wherein the rotor has a predetermined elasticity so that the rotor-side frictional surface comes into contact with the opposing surface of the armature when bent by the magnetic flux of the coil. . A plurality of the rotor-side magnetic flux shielding portions are provided in the radial direction of the rotor;
A plurality of armature-side magnetic flux blocking portions that block the radial magnetic flux of the armature are provided in the inner region of the facing surface of the armature,
2. The electromagnetic coupling device according to claim 1, wherein the rotor-side magnetic flux blocking section and the amateur-side magnetic flux blocking section are alternately arranged in the radial direction. A rotor and an amateur each having opposing surfaces arranged opposite to each other;
A coil that generates a magnetic flux for adsorbing the opposing surface of the rotor and the opposing surface of the amateur by applying a current of a predetermined value;
Of the opposing surface on the amateur side, in the radially inner region of the amateur,
An armature-side magnetic flux blocking section that blocks the magnetic flux in the radial direction of the amateur;
An amateur-side friction surface divided into a plurality of radial directions by the amateur-side magnetic flux blocking section;
The electromagnetic coupling device according to claim 1, wherein the armature has a preset elasticity so that the armature-side friction surface comes into contact with the opposing surface of the rotor when the armature is bent by the magnetic flux of the coil. . A plurality of rotor-side magnetic flux blocking portions that block the magnetic flux in the radial direction of the rotor are provided in the inner region of the opposed surface of the rotor in the circumferential direction of the rotor,
A plurality of the armature-side magnetic flux shielding portions are provided in the radial direction of the armature;
4. The electromagnetic coupling device according to claim 3, wherein the rotor-side magnetic flux blocking section and the amateur-side magnetic flux blocking section are alternately arranged in the radial direction.   5. The device according to claim 1, wherein at least one of the rotor-side magnetic flux blocking section and the amateur-side magnetic flux blocking section is provided in a circumferential direction of the rotor or the amateur. The electromagnetic coupling device according to claim 1.   6. The device according to claim 1, wherein at least one of the rotor-side magnetic flux blocking section and the amateur-side magnetic flux blocking section is arranged at equal intervals in a circumferential direction of the rotor or the amateur. The electromagnetic coupling device according to claim 1.

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