JP4993098B2 - Electromagnetic coupling device and manufacturing method thereof - Google Patents

Description

  The present invention relates to an electromagnetic coupling device that transmits and blocks torque from a main drive side to a driven side by electromagnetic action, and a method for manufacturing the same.

2. Description of the Related Art Conventionally, an electromagnetic coupling device has been used to transmit and block torque from a main driving side, which 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. Yes.

  In such an electromagnetic coupling device, the following configuration can be considered in order to increase the transmitted torque as much as possible. That is, the outer edge portion of the rotor or amateur is protruded, and when the coil is energized, only the outer edge portion of each friction surface of the rotor and the amateur is brought into contact with the other inner region. That is, by providing a gap (clearance) between the inner regions during energization, the torque radius is increased as much as possible. Thereby, the whole torque can be increased.

Here, the rotor and the amateur need to be arranged as close as possible because the torque increases as the distance between the rotor and the amateur decreases. However, if the rotor and the amateur are brought too close together, the inner region of the rotor or amateur will bend, causing them to contact each other. And the amount of bending becomes so large that it approaches the center of a rotor or an amateur. In view of this, it is conceivable to provide a plurality of steps in the inner region of the rotor or amateur so that the distance between the rotors and the amateurs increases as the distance from the center increases. As a result, the inner region can be maintained in a non-contact manner even when the inner region of the rotor or the armature is bent during energization while bringing the rotor and the amateur as close as possible.
JP 2004-52985 A

  However, when providing a plurality of steps as described above, it is necessary to form the first step on the outside of the inner region of the rotor or the amateur, and then sequentially form the steps on the inside, which is troublesome to manufacture. There's a problem.

  This invention is made | formed in view of such a situation, Comprising: It aims at providing the electromagnetic coupling device which can be manufactured rapidly and easily, and its manufacturing method.

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 an outer edge portion of the opposing surface of the rotor and an outer edge portion of the opposing surface of the amateur are connected to each other by applying a predetermined current. And a coil for generating a magnetic flux for deflecting an inner region of the opposing surface of the rotor from the outer edge portion toward the amateur side, and an inner region of the opposing surface of the rotor. A plurality of rotor-side magnetic flux blocking portions that are provided in the circumferential direction of the rotor and block the magnetic flux in the radial direction of the rotor; and a plurality of rotor-side friction surfaces that are partitioned in the radial direction by the rotor-side magnetic flux blocking portion. provided, rotor-side inclined portion gradually away from the said armature from the radially outer side of the rotor inwardly is provided across the plurality of rotor-side friction face, before The rotor-side inclined portion is arranged so that the inner region is opposed to one of the amateurs when a predetermined current is passed so that the outer edge portions are not attracted to each other by the magnetic flux so as not to contact the opposing surfaces of the amateur. It is possible to calculate backward from a curve indicating the position when it is bent closest to the surface and not in contact with the facing surface of the amateur, and the energization is stopped from the position on the curve to It is provided in advance along a bending curve of the rotor, which is a curve indicating a position when the bending is released by the restoring force and the inner region is restored .

  According to the present invention, the rotor-side inclined portion that is gradually separated from the armature from the radially outer side to the inner side of the rotor is provided over the plurality of rotor-side friction surfaces, so that it can be manufactured quickly and easily. can do.

  Further, in the present invention, the rotor-side inclined portion is provided in advance along the bending curve of the rotor so that the outer edge portions are not attracted to each other when the outer edge portions are attracted by the magnetic flux. It is characterized by that.

  According to this invention, when energizing the coil, the inner region of the rotor can be made as close as possible to one of the main surfaces of the armature, but not brought into contact with one of the main surfaces.

  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, not only can the loop extending from the rotor to the amateur be surely made, but also the suction force can be increased over the entire radial direction.

Further, the present invention provides a rotor and an armature each having opposing surfaces arranged opposite to each other, and an outer edge portion of the opposing surface of the rotor and an outer edge portion of the opposing surface of the amateur by applying a current of a predetermined value. And a coil for generating a magnetic flux for deflecting an inner region of the opposite surface of the amateur to the rotor side of the outer edge portion of the opposite surface of the amateur, The region includes a plurality of armature-side magnetic flux blocking portions provided in the circumferential direction of the armature to block the magnetic flux in the radial direction of the armature, and armature-side friction divided in the radial direction by the armature-side magnetic flux blocking portion. A plurality of armature-side inclined portions that are gradually separated from the rotor from the radially outer side to the inner side of the armature. Provided over mature side friction surface, said armature-side inclined portion, such that the outer edges by the magnetic flux does not contact the opposing surface of the rotor when it is adsorbed, the armature side upon applying a predetermined current It is possible to calculate backward from the curve indicating the position when the inclined portion is bent closest to the opposed surface of the rotor and not in contact with the opposed surface of the rotor, and the energization is stopped from the position on the curved line. The armature is provided in advance along a bending curve of the amateur, which is a curve indicating a position when the armature-side inclined portion is returned to its original state after the bending is released by the restoring force of the amateur .

  According to the present invention, since the amateur-side inclined portions that are gradually separated from the rotor from the radially outer side to the inner side of the amateur are provided over the plurality of amateur-side friction surfaces, it is possible to manufacture quickly and easily. can do.

  Further, according to the present invention, the armature-side inclined portion is provided in advance along the deflection curve of the amateur so that the outer edge portions are not brought into contact with the opposing surfaces of the rotor when the outer edge portions are adsorbed by the magnetic flux. It is characterized by that.

  According to the present invention, when the coil is energized, the inner area of the armature can be made as close as possible to the bottom face of the rotor, but can not be brought into contact with the bottom face.

  Further, according to 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, and the diameter of the rotor A plurality of 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, not only can the loop extending from the rotor to the amateur be surely made, but also the suction force can be increased over the entire radial direction.

Further, the present invention provides a rotor and an armature each having opposing surfaces arranged opposite to each other, and an outer edge portion of the opposing surface of the rotor and an outer edge portion of the opposing surface of the amateur by applying a current of a predetermined value. And a coil for generating a magnetic flux for deflecting an inner region of the opposing surface of the rotor from the outer edge portion toward the amateur side, and an inner region of the opposing surface of the rotor A plurality of rotor-side magnetic flux blocking portions provided in the circumferential direction of the rotor to block the magnetic flux in the radial direction of the rotor; and a plurality of rotor-side friction surfaces partitioned in the radial direction by the rotor-side magnetic flux blocking portion; The plurality of rotor-side friction surfaces are processed over the plurality of rotor-side friction surfaces, from the radially outer side to the inner side of the rotor. Look including a processing step of forming a selfish gradually deeper comprising rotor-side inclined portion,
In the processing step, when the predetermined current is applied, the inner region is one of the opposing surfaces of the amateur so that the outer edges are not attracted to each other by the magnetic flux. Can be calculated backward from a curve indicating the position when the armature is bent in a state where it is closest to the armature and is not in contact with the facing surface of the amateur, and the energization is stopped from the position on the curve to restore the facing surface of the rotor. The rotor-side inclined portion is formed along a bending curve of the rotor, which is a curve indicating a position when the bending is released by force and the inner region returns to its original position .

  According to the present invention, since the inclined portion can be formed on the rotor-side friction surface in one step by inclining the bottom surface and pressing it against the processing surface, the number of steps during manufacturing can be reduced.

Further, the present invention provides a rotor and an armature each having opposing surfaces arranged opposite to each other, and an outer edge portion of the opposing surface of the rotor and an outer edge portion of the opposing surface of the amateur by applying a current of a predetermined value. And a coil for generating a magnetic flux for deflecting a region inward of the outer edge portion of the opposing surface of the rotor to the amateur side, the inner surface of the opposing surface on the amateur side. A plurality of armature-side magnetic flux blocking portions provided in the circumferential direction of the armature to block the radial magnetic flux of the armature, and an armature-side friction surface divided into the radial direction by the armature-side magnetic flux blocking portion. And manufacturing the plurality of armature-side friction surfaces over the plurality of armature-side friction surfaces. Look including a processing step of forming the armature-side inclined portion gradually becomes deeper toward the inside from the radially outward of said armature, in the processing step, the outer edges by the magnetic flux of the rotor when it is adsorbed The position when the armature-side inclined portion is bent closest to the opposed surface of the rotor and not in contact with the opposed surface of the rotor so as not to contact the opposed surface An amateur that is a curve that indicates the position when the armature-side inclined portion is restored to the original state after being deenergized by the restoring force of the amateur after stopping energization from the position on the curve The armature-side inclined portion is formed along the bending curve .

  According to the present invention, the inclined surface can be formed on the amateur side friction surface in one step by inclining the amateur main surface and pressing it against the machining surface, so that the number of steps in manufacturing can be reduced. .

  According to the present invention, the number of steps during production can be reduced, and therefore production can be performed quickly and easily.

(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. Six 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.

Further, in the present embodiment, as shown in FIG. 1, the outer edge portion 18 on the bottom surface 3 a side of the rotor 3 protrudes along the axis L direction. In a state where the coil 8 is not energized, the rotor-side outer peripheral friction surface 33 and the rotor-side inner peripheral friction surface 34 are immersed on the fixed portion 2 side with respect to the tip surface 21 of the outer edge portion 18 on the bottom surface 3a side. ing.
Further, on the tip surface 21, the rotor side outer peripheral friction surface 33, and the rotor side inner peripheral friction surface 34, a rotor side inclined portion 21a that is gradually separated from the armature 4 from the radially outer side to the inner side of the rotor 3; 33a and 34a are formed. That is, the bottom surface 3 a of the rotor 3 is inclined so as to gradually become deeper from the radially outer side to the inner side of the rotor 3. Therefore, in a state where the coil 8 is not energized, the distance dimension d1 in the direction of the axis L between the tip surface 21 and the one main surface 4a is between the rotor-side outer peripheral friction surface 33 and the one main surface 4a. The distance dimension d2 in the axis L direction is smaller than the distance dimension d3 in the axis L direction between the rotor-side inner peripheral friction surface 34 and the one main surface 4a. .
The rotor side inclined portions 21a, 33a, 34a are arranged on a straight line.

Further, when a predetermined current is passed through the coil 8 to generate a suction force between the bottom surface 3a and the one main surface 4a, the base portion 12 bends (elastically deforms) the inner region 23 toward the armature 4 side. ). The rotor-side inclined portions 21a, 33a, and 34a are disposed along the bending curve R1 of the rotor 3.
1 and 5, the bending curve R2 indicates that the inner region 23 is closest to one main surface 4a and flows into one main surface 4a when a predetermined current flows as described above. It is a curve which shows a position when bent to the state which is not contacting. On the other hand, the bending curve R1 is a curve indicating a position when the energization is stopped and the bending is released by the restoring force of the base portion 12 from the position on the bending curve R2, and the inner region 23 is restored. That is, the bending curve R1 can be calculated backward from the bending curve R2 in consideration of the shape, material, hardness, current magnitude of the coil 8 and the like of the rotor 3 and the armature 4.

  That is, the rotor side outer peripheral friction surface 33 and the rotor side inner peripheral friction surface 34 are bent closest to one main surface 4a and not in contact with one main surface 4a when a predetermined current is passed through the coil 8. It is arranged along a bending curve R1 calculated in advance so as to be arranged at a position on the curve R2.

Next, the manufacturing method of the electromagnetic clutch 1 in this embodiment is demonstrated.
First, as shown in FIG. 6, the rotor 3 having the bottom surface 3 a extending in the direction orthogonal to the axis L is formed. Then, the rotor 3 is rotated, and a cutting tool (not shown) is brought into contact with the bottom surface 3a of the rotor 3 to polish the bottom surface 3a (processing step). At this time, the cutting tool is moved along the bending curve R1. That is, by moving the cutting tool along the bending curve R1 from the front end surface 21 to the rotor side outer peripheral friction surface 33 and the rotor side inner peripheral friction surface 34, the front end surface 21, the rotor side outer peripheral friction surface 33, as shown in FIG. And the rotor side inner peripheral friction surface 34 is ground integrally. Then, the polishing is finished when the bottom surface 3a is arranged on the bending curve R1 calculated in advance. As a result, the same inclined portion is integrally formed from the tip surface 21 to the rotor side outer peripheral friction surface 33 and the rotor side inner peripheral friction surface 34. These inclined portions become the rotor-side inclined portions 21a, 33a, and 34a. These rotor side inclined portions 21a, 33a, and 34a are formed along a bending curve R1. Further, when viewed from the side, an angle θ1 formed by a line extending over the rotor-side inclined portions 21a, 33a, and 34a and an orthogonal axis N perpendicular to the axis L is set to be greater than 0 ° to 3 ° or less. Preferably, it is set to more than 0 ° to 1 ° or less.

  Then, the shaft portion 14 is inserted into the cylindrical hole 2a of the fixed portion 2, and the armature 4 is disposed to face the rotor 3, whereby the electromagnetic clutch 1 shown in FIG.

Next, the operation of the electromagnetic clutch 1 in this embodiment 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. 8, 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, as shown in FIG. 9, 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). Since the outer edge 18 protrudes from the bottom surface 3a, the outer edge 25 of one main surface 4a contacts the tip surface 21 at a certain timing. 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, the armature 4 comes into contact with the outer edge portion 18 of the rotor 3 by the attractive force due to the magnetic flux, and the base portion 12 has elasticity. The inner region 23 bends toward the amateur 4. At this time, since the rotor-side inclined portions 21a, 33a, and 34a are arranged along the bending curve R1 in advance, they are arranged along the bending curve R2, as shown in FIG. That is, the rotor side outer peripheral friction surface 33 and the rotor side inner peripheral friction surface 34 are closest to one main surface 4a of the armature 4 and are not in contact with one main surface 4a.
Therefore, the diameter dimension (torque radius) from the axis L to the contact point between the rotor 3 and the armature 4 (contact point between the outer edge portions 18 and 25) is maximized, and the overall torque is increased.

Here, when the electromagnetic clutch 1 is used in a system in which the additional voltage fluctuates, there is a possibility that a current equal to or greater than a predetermined current flows in the coil 8 when overvoltage occurs. In this case, an excessive load is applied to the electromagnetic clutch 1.
In the electromagnetic clutch 1 in the present embodiment, when a current equal to or greater than a predetermined current flows through the coil 8, the attractive force increases, and the bottom surface 3a and the one main surface 4a come into contact with each other.
Since the torque radius is determined by the contact point between the bottom surface 3a and the one main surface 4a from the axis L, when the suction force increases, the bottom surface 3a and the one main surface 4a contact each other in the radial direction, As a result, the overall torque radius decreases.
Therefore, the transmission torque can be reduced and torque limitation can be applied.

As described above, according to the electromagnetic clutch 1 of the present embodiment, since the inclined portion can be formed on the bottom surface 3a in one step, the number of steps at the time of manufacturing can be reduced. It can be manufactured easily.
Further, by forming the rotor side outer peripheral friction surface 33 and the rotor side inner peripheral friction surface 34 along the bending curve R1, the inner region 23 is formed on one main surface 4a of the armature 4 when the coil 8 is energized. It is possible to make it close and not in contact with one main surface 4a. 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.
Furthermore, even if a current larger than a predetermined current flows through the coil 8, the torque can be limited, so that the electromagnetic clutch 1 and the driven device can be protected and their durability can be improved.

(Embodiment 2)
Next, a second embodiment of the present invention will be described.
10 and 11 show a second embodiment of the present invention.
10 and 11, the same components as those shown in FIGS. 1 to 9 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 such elasticity that the distal end surface 21 and the one main surface 4a are in contact with each other when the coil 8 is energized, and the armature 4 bends toward the rotor 3 side. The armature side outer peripheral friction surface 37 and the armature side inner peripheral friction surface 38 are submerged on the other main surface side of the armature 4 with respect to the distal end surface 21 of the outer edge portion 18. Furthermore, the amateur-side outer peripheral friction surface 37 and the amateur-side inner peripheral friction surface 38 are formed with amateur-side inclined portions 37 a and 38 a that are gradually separated from the rotor 3 from the radially outer side to the inner side of the armature 4. ing. That is, one main surface 4a of the armature 4 is inclined so as to gradually become deeper from the radially outer side of the armature 4 toward the inner side. Therefore, in the state where the coil 8 is not energized, the distance dimension d1 in the direction of the axis L between the tip surface 21 and the one main surface 4a is the difference between the rotor side outer peripheral friction surface 33 and the amateur side inner peripheral friction surface 38. This distance dimension d2 is smaller than the distance dimension d3 between the rotor side inner peripheral friction surface 34 and the amateur side inner peripheral friction surface 38 in the axis L direction. It is getting smaller.
The amateur side inclined portions 37a and 38a are arranged on a straight line.

Further, the armature-side inclined portions 37a and 38a bend (elastically deform) to the rotor 3 side when a predetermined current is passed through the coil 8 to generate an attractive force between the bottom surface 3a and the one main surface 4a. It has such elasticity. The amateur-side inclined portions 37 a and 38 a are arranged along the bending curve R <b> 3 of the amateur 4.
The bending curve R4 is when the armature-side inclined portions 37a, 38a are closest to the bottom surface 3a and are not in contact with the bottom surface 3a when a predetermined current flows as described above. It is a curve which shows the position of. On the other hand, the bending curve R3 is a curve indicating a position when the armature-side inclined portions 37a and 38a are restored to their original positions by stopping energization from the position on the bending curve R4 and releasing the bending by the restoring force of the amateur 4. . That is, the bending curve R3 can be calculated backward from the bending curve R4 in consideration of the shape, material, hardness, current magnitude of the coil 8 and the like of the rotor 3 and the armature 4.

Next, the manufacturing method of the electromagnetic clutch 1 in this embodiment is demonstrated.
First, the amateur 4 shown in FIG. 12 is formed. Then, as shown in FIG. 13, the armature 4 is rotated, and a tool (not shown) is brought into contact with one main surface 4 a to polish one main surface 4 a (processing step). At this time, the cutting tool is moved along the bending curve R3. That is, by moving the cutting tool along the bending curve R3 from the outer edge 25 to the amateur side outer peripheral friction surface 37 and the amateur side inner peripheral friction surface 37, the outer edge 25 and the amateur side outer peripheral friction surface 37 are moved as shown in FIG. And the amateur side inner peripheral friction surface 38 is polished integrally. Then, when one of the main surfaces 4a is arranged on the bending curve R3 calculated in advance, the polishing is finished. Thereby, the same inclined part is integrally formed from the outer edge part 25 to the amateur side outer peripheral friction surface 37 and the amateur side inner peripheral friction surface 38. These inclined portions become amateur-side inclined portions 37a and 38a. These amateur-side inclined portions 37a and 38a are formed along a bending curve R3. Further, the angle θ2 formed by the line extending over the amateur-side inclined portions 37a and 38a when viewed from the side and the orthogonal axis N is set to be greater than 0 ° and less than or equal to 3 °. Preferably, it is set to more than 0 ° to 1 ° or less.

  As described above, according to the electromagnetic clutch 1 in the present embodiment, since the inclined portion can be formed in one main surface 4a in one step, the number of steps in manufacturing can be reduced. Can be manufactured quickly and easily.

In the first and second embodiments, the numbers and positions in the circumferential direction and the radial direction of the outer peripheral long hole 19, the inner peripheral long hole 20, and the armature side long hole 29 can be changed as appropriate.
In addition, when a predetermined current is passed through the coil 8 and the rotor 3 or the armature 4 is bent, the distance dimension (interval) between the inner regions 23 and 30 is made equal over the entire length in the radial direction in advance. The inclined portions 21a, 33a, 34a, 37a, and 38a may be set to predetermined angles θ1 and θ2. Thereby, the maximum torque can be generated.
Further, the tip end surface 21 may not be provided with the rotor-side inclined portion 21a. Thereby, the front end surface 21 and the outer edge part 25 can be made to contact reliably.
Moreover, although the polishing process has been described as an example of the machining process, the present invention is not limited thereto, and may be a machining process such as cutting.
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 clutch which concerns on this invention, Comprising: It is sectional drawing which fractures | ruptures an electromagnetic clutch to 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 a figure which shows the method of manufacturing the rotor of FIG. 1, Comprising: It is explanatory drawing which shows the state before grind | polishing the bottom face of a rotor. It is explanatory drawing which shows a mode that an inclination part is formed in the bottom face of FIG. 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. 8 moved to the rotor side, and the rotor bent to the amateur side. It is a figure which shows 2nd Embodiment of the electromagnetic clutch 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. 10 moved to the rotor side and bent to the rotor side. It is a figure which shows the method of manufacturing the amateur of FIG. 10, Comprising: It is explanatory drawing which shows the state before grind | polishing one main surface of an amateur. It is explanatory drawing which shows a mode that an inclination part is formed in one main surface of the amateur of FIG.

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)
33a Rotor side inclined portion 34 Rotor side inner peripheral friction surface (rotor side friction surface)
34a Rotor side inclined part 37 Amateur side outer peripheral friction surface (Amateur side friction surface)
37a Amateur side inclined part 38 Amateur side inner peripheral friction surface (Amateur side friction surface)
38a Amateur side slope

Claims (6)

A rotor and an amateur each having opposing surfaces arranged opposite to each other;
By applying a current of a predetermined value, the outer edge portion of the opposed surface of the rotor and the outer edge portion of the opposed surface of the amateur are attracted to each other, and the inner surface of the opposed surface of the rotor is inward of the outer edge portion. A coil for generating a magnetic flux for deflecting the region toward the amateur side,
In the inner area of the opposing surface of the rotor,
A plurality of rotor-side magnetic flux blocking portions that are provided in the circumferential direction of the rotor and block the magnetic flux in the radial direction of the rotor;
A plurality of rotor-side friction surfaces partitioned in the radial direction by the rotor-side magnetic flux blocking section;
A rotor-side inclined portion that is gradually separated from the armature from the radially outer side to the inner side of the rotor is provided across the plurality of rotor-side friction surfaces ,
The rotor-side inclined portion is configured so that when the predetermined current flows, the inner region of one of the amateurs is not in contact with the opposing surfaces of the amateur when the outer edge portions are adsorbed by the magnetic flux. It is possible to calculate backward from a curve indicating the position when it is bent closest to the facing surface and not in contact with the facing surface of the amateur, and the energization is stopped from the position on the curve, and the facing surface of the rotor The electromagnetic coupling device is provided in advance along a bending curve of the rotor, which is a curve indicating a position when the inner region is returned to its original state after the bending is released by the restoring force . 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;
By applying a current of a predetermined value, the outer edge portion of the opposed surface of the rotor and the outer edge portion of the opposed surface of the amateur are attracted to each other, and the inner surface of the opposed surface of the amateur is inward of the outer edge portion. A coil for generating a magnetic flux for deflecting the region toward the rotor,
In the inner area of the opposing surface on the amateur side,
A plurality of armature-side magnetic flux blocking portions that are provided in the circumferential direction of the armature and block the magnetic flux in the radial direction of the armature;
An amateur-side friction surface divided into a plurality of radial directions by the amateur-side magnetic flux blocking section;
An amateur-side inclined portion that is gradually separated from the rotor from the radially outer side to the inner side of the amateur is provided across the plurality of amateur-side friction surfaces,
The armature-side inclined portion is configured so that the armature-side inclined portion is opposed to the rotor-facing surface when a predetermined current is passed so that the outer edge portions are not attracted to each other by the magnetic flux. Can be calculated backward from a curve indicating the position when bent to a state where it is closest to the rotor and not in contact with the opposing surface of the rotor, and is deenergized from the position on the curve and bent by the restoring force of the amateur. The electromagnetic coupling device is provided in advance along a bending curve of the amateur, which is a curve indicating a position when the armature-side inclined portion is returned to its original state after being released . 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 opposing surface of the rotor, and a plurality of rotor-side magnetic flux blocking portions are provided in the circumferential direction of the rotor. And
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 . A rotor and an amateur each having opposing surfaces arranged opposite to each other;
By applying a current of a predetermined value, the outer edge portion of the opposed surface of the rotor and the outer edge portion of the opposed surface of the amateur are attracted to each other, and the inner surface of the opposed surface of the rotor is inward of the outer edge portion. A coil for generating a magnetic flux for deflecting the region toward the amateur side,
In the inner area of the opposing surface of the rotor,
A plurality of rotor-side magnetic flux blocking portions that are provided in the circumferential direction of the rotor and block the magnetic flux in the radial direction of the rotor;
A method of manufacturing an electromagnetic coupling device provided with a plurality of rotor-side friction surfaces divided in the radial direction by the rotor-side magnetic flux shielding part,
Processing the plurality of rotor-side friction surfaces over the plurality of rotor-side friction surfaces, and forming a rotor-side inclined portion that gradually becomes deeper inward from the radially outer side of the rotor,
In the processing step, when the predetermined current is applied, the inner region is one of the opposing surfaces of the amateur so that the outer edges are not attracted to each other by the magnetic flux. Can be calculated backward from a curve indicating the position when the armature is bent in a state where it is closest to the armature and is not in contact with the facing surface of the amateur, and the energization is stopped from the position on the curve to restore the facing surface of the rotor. In the electromagnetic coupling device, the rotor-side inclined portion is formed along a bending curve of the rotor, which is a curve indicating a position when the bending is released by force and the inner region is restored. Manufacturing method . A rotor and an amateur each having opposing surfaces arranged opposite to each other;
By applying a current of a predetermined value, the outer edge portion of the opposed surface of the rotor and the outer edge portion of the opposed surface of the amateur are attracted to each other, and the inner surface of the opposed surface of the rotor is inward of the outer edge portion. A coil for generating a magnetic flux for deflecting the region toward the amateur side,
In the inner area of the opposing surface on the amateur side,
A plurality of armature-side magnetic flux blocking portions that are provided in the circumferential direction of the armature and block the magnetic flux in the radial direction of the armature;
A manufacturing method of an electromagnetic coupling device provided with an armature side friction surface divided into a plurality in the radial direction by the armature side magnetic flux block,
Machining the plurality of armature-side friction surfaces over the plurality of armature-side friction surfaces to form an armature-side inclined portion that gradually becomes deeper inward from the radially outer side of the armature,
In the processing step, when the predetermined current is passed, the armature-side inclined portion is most opposed to the opposing surface of the rotor so that the outer edge portions are not attracted to each other by the magnetic flux. It is possible to calculate backward from the curve indicating the position when it is brought close and not in contact with the opposing surface of the rotor, and the bending is released by the restoring force of the amateur by stopping energization from the position on the curve Then, the armature-side inclined portion is formed along an armature deflection curve, which is a curve indicating a position when the armature-side inclined portion returns to its original position .

Images