JP2009185874A - Electromagnetic connection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To take appropriate measures for abnormal sounds called scraping sounds generated when pressing an armature against a rotary plate. <P>SOLUTION: This electromagnetic connection device comprises the rotary plate 1 and the armature 2 as a pair of plates arranged facing each other on the same axial center m, and an electromagnetic drive means 3 for giving relative contacting/leaving operation to the rotary plate 1 and the armature 2 in the direction of the axial center m. To cope with the scraping sounds generated when pressing the armature 2 against the rotary plate 1 through the on/off operation of the electromagnetic drive means 3 in the condition that a relative angular velocity difference exists therebetween during disengagement, a first sound deadening plate 4 and a second sound deadening plate 5 are built up with each other and mounted on the face on the counter press-against side of the rotary plate 1 as an object in the condition that the contact faces of the sound deadening plates 4, 5 are partially adhered to each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electromagnetic coupling device that can be used as an electromagnetic brake, an electromagnetic clutch, or the like.

  As one using this type of electromagnetic coupling device, for example, a non-excitation operation type electromagnetic brake as shown in Patent Document 1 is known.

  The electromagnetic brake includes a rotating shaft attached to the induction motor, electromagnetic driving means fixed to the induction motor, a facing rotating plate attached to the rotating shaft, the electromagnetic driving means, and the rotating plate. And an armature serving as a braking plate mounted so as to be movable in the axial direction.

  And in order to solve the problem that the rotating shaft vibrates and generates a connecting sound when the brake is operated in this type of brake, the rigidity of the rotating plate is lowered to absorb the vibration of the rotating shaft. The structure which made the material of the rotation plate aluminum and provided the window opening is disclosed.

Alternatively, a slit is provided in the armature so as to absorb vibration by lowering the rigidity of the armature, and a slit and window opening are provided in the rotating plate so as to absorb vibration by reducing the rigidity of the rotating plate. There is also disclosed a configuration in which a damping plate is evenly attached to the entire surface of the contact surface via a viscoelastic double-sided adhesive tape and a slit is provided in the damping plate.
Japanese Patent Laid-Open No. 10-30658

  However, even when such measures are taken, there still remains a problem that a so-called squeal is generated when the electromagnetic drive means is excited and the armature is pressed against the rotating plate. As a result of studying this, this squealing sound is caused by frictional vibration (self-excited vibration) generated between the facing and armature during braking, and this frictional vibration becomes an annoying sound in the audible range due to the amplification effect of resonance. It is thought that.

  Such a problem is not limited to the induction motor described above, and generally a pair of plates arranged facing each other on the same axis, and electromagnetic drive means for relatively moving these plates in the axial direction. From the state in which there is a relative angular velocity difference between the two plates when dissociated, the entire apparatus is configured to press-contact both plates through the on / off switching operation of the electromagnetic driving means.

  It is an object of the present invention to newly provide an electromagnetic coupling device that effectively treats such a squeal.

  In order to achieve this object, the present invention takes the following measures.

  In other words, the electromagnetic coupling device of the present invention includes a pair of plates that face each other on the same axis, and electromagnetic driving means that relatively moves the plates in the axial direction. From the state in which there is a relative angular velocity difference at the time of dissociation between the plates, and having a configuration for electromagnetic coupling that presses both plates through the on / off switching operation of the electromagnetic drive means, at least one of the plates as an attachment target plate, It is characterized in that a silencer plate is attached to the surface on the counter pressure contact side in a state where the contact surfaces are partially adhered.

  In this way, by partially attaching the silencer plate to the plate that makes contact / separation operation, a portion of the silencer plate that is massed or not connected to the impact during pressure contact easily vibrates with the attachment target plate. Will be put in a state. By this vibration, the attenuation of the frictional vibration is increased, and the squealing noise is eliminated or suppressed.

  In this case, “on the same axis” may extend over two axes as long as the axes coincide. In the “relative contact / separation operation”, one of them may be rotated and the other may be stationary, or both may be rotating. The sound deadening plate does not necessarily have to be directly attached to the attachment target plate, and a mode of being indirectly attached via another member is also possible.

  “Through the on / off switching operation” includes a mode of dissociating when energized and being pressed when not energized, and a mode of being pressed when energized and dissociated when not energized.

  Alternatively, an electromagnetic coupling device having another configuration according to the present invention includes the above-described configuration for electromagnetic coupling, and at least one of the plates is an attachment target plate, and a plurality of silencer plates are provided on the surface opposite to the pressure contact side. Further, the present invention is characterized in that the contact surfaces of the sound deadening plates are attached by being superposed in a partially adhered state.

  In this case, the thing which the whole area between the contact surfaces of the sound deadening plate and the mounting target plate is bonded is also included.

  If comprised in this way, since attenuation | damping by interaction of a silencer plate can be anticipated between silencer plates, since diversity arises in the combination of mass and the combination of an attachment aspect, it is effective in pursuing the silence effect.

  There are various modes in which the sound deadening plate is partially bonded. In particular, it is desirable that the center of mass is substantially on the axis and that the bonding position is unbalanced around the axis.

In order to bond in an unbalanced manner around the axis, it is only necessary to make the bonding portions unevenly distributed. However, as a preferred mode, one in which a fan-shaped region with the axis as the base point is bonded can be mentioned.
Alternatively, as another mode of partial bonding, it is also preferable that the center of mass is substantially on the axial center and the bonding position is bonded in an unbalanced state between the inner diameter side and the outer diameter side. is there.

  In this case, in order to expect a large vibration in the sound deadening plate, it is desirable that the inner diameter side is bonded and the outer diameter side is opened without being bonded.

  Furthermore, the electromagnetic coupling device of the present invention having a configuration other than the above is provided with a configuration for electromagnetic coupling. At least one of the plates is an attachment target plate, and a silencer plate is provided on the surface opposite to the pressure contact side. The silencer plates that are attached in a state where the contact surfaces are partially connected using a connecting tool, and the partially connected silencer plate has the center of mass, including the connecting tool, substantially on the axis, and is connected by the connecting tool. Is mounted in an unbalanced state around the axis.

  Even if comprised in this way, the effect according to adhesion | attachment can be acquired.

  Alternatively, in a structure having a configuration for electromagnetic coupling, at least one of the plates is set as an attachment target plate, and a plurality of sound deadening plates are bonded to a surface on the counter pressure contact side, and the contact surfaces of the sound deadening plates are partially bonded. The sound deadening plates that are superposed and attached in a state are partially attached, and the center of mass including the connector is almost on the axis, and the connection position by the connector is attached in an unbalanced state around the axis. Even in this case, adhesion and circumstances are the same.

  Examples of application of the present invention include the following.

  One of the pair of plates is an electromagnetic brake in which one is a rotating plate that can rotate integrally with the rotating shaft of the motor, and the other is a braking plate that makes contact with and separates from the rotating plate by excitation to apply braking torque to the rotating plate. .

  Of the pair of plates, one is a drive side clutch plate that constitutes a clutch, and the other is a driven side clutch that is disposed so as to be relatively close to and away from the drive side clutch plate so as to transmit drive torque to the drive side clutch plate. Electromagnetic clutch as a plate.

  Among the pair of plates, one is a rotating disk that constitutes a disk brake, and the other is a set of braking disks that are arranged so that a separation distance can be changed so as to apply a braking torque with the rotating disk sandwiched from both sides. brake.

  Since the present invention has the above-described configuration, it is only a configuration in which a silencer plate is attached in a state in which vibration due to resonance amplification caused by frictional vibration generated when the plates are pressed against each other is easily oscillated on at least one of the plates. Thus, it is possible to provide an excellent electromagnetic coupling device that can be effectively suppressed, and that effectively reduces or eliminates the generation of abnormal noise called squeal.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  The electromagnetic coupling device of this embodiment is applied to a non-excitation operation type electromagnetic brake B for braking the rotation shaft S of the general-purpose induction motor M of FIG. As shown in FIGS. 1 and 6, the motor M has a rotating shaft S projecting from both end surfaces through the motor housing mh, and the electromagnetic brake B is formed on one shaft end s1 side. A load W that is a driving target is connected to the other shaft end s2 side.

  The electromagnetic brake B moves a pair of the rotating plate 1 and the braking plate 2 that are arranged on the axis m of the rotating shaft S so as to face each other and the two plates 1 and 2 relatively move in the axial direction. And electromagnetic driving means 3. The brake plate 2 forms an output end of the electromagnetic drive means 3 and is hereinafter referred to as an armature.

  The electromagnetic driving means 3 includes a yoke 31 fixed to the end face of the motor M, and a compression coil spring 32 elastically provided between the yoke 31 (or the end face of the motor M) and the armature 2. The compression coil spring 32 of FIG. 1 is schematically shown. The yoke 31 is made of a ferromagnetic material such as iron, and an exciting coil 31b is wound around the axis m. A plurality of connecting pins 33 are fixed to the end surface 31a of the yoke 31, and the tips protrude outward from the end surface 31a.

  The armature 2 is made of a ferromagnetic material such as iron. As shown in FIGS. 1 and 2, the armature 2 has a guide hole 21 at a position corresponding to the connecting pin 33, and the guide hole 21 is connected to the connecting pin 33. By engaging, it is possible to move only in the direction of the axis m with respect to the yoke 31. A magnetic path (not shown) is formed between the yoke 31 and the armature 2 when the exciting coil 32 is energized, and the magnetism is in a direction to attract the armature 2 to the end surface 31 a of the yoke 31 against the elastic force of the coil spring 32. Generate suction. When the energization to the exciting coil 32 is cut off, the armature 2 is elastically biased by the coil spring 32 and moves away from the yoke 31. The armature 2 is provided with notches 22 for lowering the rigidity toward the center at three equiangular positions on the outer peripheral side, and a shaft hole 23 for inserting the rotation shaft S in the center.

  As shown in FIGS. 1 and 3, the rotating plate 1 is mainly composed of a plate body 11 fixed to the rotating shaft S of the motor M and having an inner surface opposed to an end surface 31 a of the yoke 31. A facing (braking part) 12 that forms a friction surface is formed on the side surface. The plate body 11 has a boss portion 11a projecting therefrom, and has a shaft hole 11b extending from the plate body 11 to the boss portion 11a at the center. The rotation shaft S of the motor M is inserted into the shaft hole 11b. The fixing shaft 11c is fixed to the rotating shaft S. In the case of this embodiment, the facing 12 is configured by adhering a pad having a partial arc shape and a large friction coefficient to the inner side surface of the plate body 11 so as to be continuous in an annular shape, and is disposed opposite to the armature 2. The gap between the rotating plate 1 and the end surface 31a of the yoke 31 is adjusted by the mounting position of the boss portion 11a on the rotating shaft S. The plate body 11 is provided with an arcuate extraction window 13 for reducing the rigidity and a notch 14 for reducing the rigidity from three equiangular positions on the outer peripheral side toward the center.

  Accordingly, when the armature 2 is energized in the gap, the armature 2 moves from the state shown in FIG. 1 to the yoke 31 side and comes into close contact with the end surface 31a of the yoke 31, thereby opening the rotating plate 1 and demagnetizing the coil. The armature 2 is urged by the spring 32 to move to a position where the armature 2 abuts against the facing 12, and further, the armature 2 is elastically contacted with the rotating plate 1 through the facing 12 to apply a braking torque to the rotating plate 1.

  When the armature 2 is pressed against the rotating rotating plate 1 through the facing 12 during the braking operation, the facing 12 and the rotating plate 1 frictionally vibrate together with the armature 2 due to the frictional impact at that time. An abnormal sound called a squeal is generated by an amplification effect due to resonance at this time.

  Therefore, in the present embodiment, the rotating plate 1 is used as an attachment target plate, and a disk-shaped first silencing plate 4 (FIGS. 1 and 4) corresponding to the damping plate of Patent Document 1 is provided on the surface 1a on the pressure-contact side. Is attached via a double-sided tape 40 having substantially the same diameter as that of the first silencer plate 4, and a disc-shaped second silencer plate 5 (see FIGS. 1 and 5) is further provided thereon. These are pasted via a double-sided tape 50 having the same diameter as that of the second sound deadening plate 5 and divided into 1/3.

  As shown in FIGS. 1 and 4, the first silencing plate 4 is attached to the surface 1 a on the counter pressure contact side of the plate body 11 by fitting the insertion hole 4 a to the boss portion 11 a of the rotating plate 1. In order to reduce the rigidity, notches 41 are provided in the axial direction from three equiangular positions on the outer peripheral side so as to be adhered to the entire contact surface with respect to the plate body 11. More precisely, the double-sided tape 40 is provided in the entire area excluding the shaft hole 4a and the notch 41, as indicated by oblique lines in the right diagram of FIG. However, in consideration of the shape of the plate body 11 that is the bonding destination, the double-sided tape 40 does not have to exist in a portion that does not contact the plate body 11, that is, a portion corresponding to the extraction window 13 of the plate body 11. The first silencing plate 41 according to this embodiment is positioned by engaging the notch 41 with a pin 15 (see FIGS. 3 and 4) provided on a part of the plate body 11, but is essential for the present invention. It is not a configuration of.

  On the other hand, as shown in FIG. 1 and FIG. 5, the second silencing plate 5 has the insertion hole 5 a fitted into the boss portion 11 a of the rotating plate 1 and the first silencing on the surface 1 a on the counter pressure contact side of the plate body 11. It is arranged in a superposed manner via the plate 4 and attached to the first silencer plate 4 in a partially adhered state so as to be unbalanced around the axis m. This silencer plate 5 also has notches 51 at three equiangular positions on the outer peripheral side corresponding to the shape of the first silencer plate 4. In this embodiment, the notch 51 is the first silencer in the mounted state. The position of the notch 41 of the plate 4 is matched. When the second silencer plate 5 is partitioned into three substantially sectoral regions A by an imaginary line t passing through the center of the axis m and the notch 51, one of the sectoral regions A is shown on the right side of FIG. Is attached to the opposing surface 4b of the first silencer plate 4 using a fan-shaped double-sided tape 50 indicated by diagonal lines in FIG. 2, and the other two fan-shaped regions A and A are in an unbonded state. Since the mass of the double-sided tape 50 can be neglected based on the mass of the silencer plate 5 itself, the second silencer plate 5 is thus positioned with the center of mass approximately on the axis m, and the bonding position is the circle of the silencer plate 4. It is limited to only the 1/3 sector region in the circumferential direction, and is in an unbalanced adhesive state with respect to the axis m.

  FIG. 6 is a measurement configuration diagram configured to perform a vibration and noise test on the electromagnetic brake B having such a structure. In the measurement configuration diagram, the sound level meter C is opposed to the electromagnetic brake B, a predetermined load W is attached to the rotating shaft S, the output of the sound level meter C is recorded in the waveform recorder D, and fast Fourier transform (FFT) is used. Frequency analysis is performed. Further, in order to take out the vibration at the time of pressure contact, facing the armature 2 which is a stationary disk, an acceleration pickup E is attached to the housing Bh of the electromagnetic brake B, and the output from the acceleration pickup E is recorded in the waveform recorder D, Frequency analysis is performed by Fourier transform (FFT).

The test conditions were that the first silencing plate 40 (thickness 1.2 mm) was evenly applied to the entire contact surface with the rotating plate as described above, and the second silencing plate 50 (thickness 1.2 mm) was as described above. Partially affixing to the first silencing plate 40. Then, a load W having a load inertia of 1.15 × 10 ⁻⁴ kgm ² is attached, and the motor M and the electromagnetic brake B are energized at a voltage of 200 V and 60 Hz to maintain a steady rotational speed. Thereafter, the power sources of the motor M and the electromagnetic brake B are turned off at the same time, and the vibration waveform and the noise waveform generated at that time (with respect to the squealing sound) are measured using the acceleration pickup E and the sound level meter C.

  FIG. 9 shows measurement data when the above test is performed, and FIG. 8 shows measurement data when the same test is performed with the thickness of the first silencer plate 40 being 0.8 mm. FIG. 7 shows measurement data when a test is performed with only the first silencer plate 4 attached and the second silencer plate 5 removed as a comparative example.

  That is, in the case of being based on substantially the same structure as that of Patent Document 1 in which only one first silencing plate 4 is attached to the entire area of the contact surface with respect to the rotating plate 1, as shown in FIG. A squealing section of about 0.07 seconds occurred from the impact vibration at the time, and the noise level was about 87 dB.

  On the other hand, when the second silencer plate 5 is partially bonded to the slightly thinner first silencer plate 4, as shown in FIG. The noise level was reduced to about 59 dB.

  Further, when the second silencer plate 5 is partially adhered to the first silencer plate 4 which is not thinned, as shown in FIG. The noise level was reduced to about 50 dB.

  In terms of the correlation with the audibility level, it can be generally regarded that there is no squeal at 50 dB or less, low squeal at 50 to 60 dB, and high squeal at 60 dB or more. It was confirmed that the noise level could be effectively suppressed and that the squeal itself could be effectively eliminated in the case of FIG.

  Depending on the purpose and application, the required reduction level of squeal differs, but these data indicate that unbalanced bonding is more effective than bonding over the entire contact surface, and that the plates that are pressed against each other have some mass. It was confirmed that a certain person was more effective.

  As described above, the electromagnetic coupling device according to the present embodiment is a pair of the rotating plate 1 and the armature 2 that are arranged facing each other on the same axis m, and the rotating plate 1 and the armature 2 are arranged in the direction of the axis m. The electromagnetic drive means 3 that is relatively moved to and away from the rotating plate 1 and the armature 2 when there is a relative angular velocity difference at the time of dissociation, and the electromagnetic drive means 3 is brought into pressure contact through the on / off switching operation. In order to deal with squealing noise, the rotating plate 1 is used as a mounting target plate, and the first silencing plate 4 and the second silencing plate 5 are disposed on the surface 1a on the opposite pressure contact side between the contact surfaces of the silencing plates 4 and 5. Are attached by being polymerized in a partially adhered state.

  In this way, by attaching the silencer plate 5 indirectly or partially to the rotating plate 1 that moves toward and away, the portion of the second silencer plate 5 that has mass against the impact during pressure contact is not bonded. Therefore, the rotating plate 1 including the sound deadening plate 4 and the rotating plate 1 to be attached are placed in a state of being easily vibrated. By this vibration, the attenuation of the frictional vibration can be increased to effectively eliminate or suppress the squeal. In particular, when a sufficient adhesion area cannot be expected like the rotating plate 1 of the present embodiment, the second silencing plate 5 may be partially attached after the first silencing plate 4 is attached over the entire contact surface. In addition, even when there is a component corresponding to the silencer plate 4 from the beginning as in Patent Document 1, the present invention can be easily configured only by retrofitting the silencer plate 5. Of course, since the diversity of the combination of the masses of the silencer plates 4 and 5 and the combination of the attachment modes can be obtained, it is effective in pursuing a structure having a great silencing effect.

  Further, the second silencer plate 5 that is partially bonded has the center of mass substantially on the axis m and is attached in an unbalanced state around the axis m, so that the second silencer plate 5 is attached. While avoiding adversely affecting the rotation of the rotating plate 1, relatively large vibrations can be expected in the second silencing plate 5 itself due to the imbalance of the mounting position.

  Furthermore, in the case of adhesion, a certain degree of mounting strength and a certain degree of imbalance in the mounting position are required, but the second sound deadening plate 5 that is partially bonded is a fan-shaped region based on the axis m. Since A is bonded, it is possible to realize a mode in which both are effectively made compatible with a simple structure.

  As mentioned above, although one Embodiment of this invention was described, the specific structure of a motor or an electromagnetic brake is not limited only to embodiment mentioned above.

  For example, the plate window, the plate body, the armature, each notch provided in the sound deadening plate, etc. are not essential requirements of the present invention, and the number and position of the notches are not particularly limited. Absent.

  Moreover, in the said embodiment, the shape of a plate main body is considered and the 1st silencer plate 4 is adhere | attached on the whole contact surface in order to ensure the adhesion area, and the 2nd silencer plate 5 is partially attached to a contact surface. If there is no hindrance to the mounting strength even if it is partially bonded to the plate body, or if it is easy to bond partially, such as when there is no punch hole, the first silencer plate is partially It does not matter if the second sound deadening plate is not adhered to the plate body. Of course, it is also effective to increase the mass by further bonding the second silencing plate to the first silencing plate if a certain degree of mounting strength can be obtained even if the first silencing plate is partially bonded. . In this case, the second silencing plate can be bonded to the first silencing plate over the entire area or partially.

  Further, as a mode of partial bonding, the center of mass is substantially on the axis m as in the silencer plate 6 shown in FIG. 10, and the bonding position by the double-sided tape 60 is unbalanced between the inner diameter side and the outer diameter side. The sound deadening plate 6 is bonded to a mounting target plate (not shown) by the double-sided tape 60 partially arranged on the inner diameter side as in the illustrated example, and the outer diameter side is attached without being bonded. It is also effective to do. There is a similar effect in that the vibration of the sound deadening plate 6 itself can be caused. In particular, a better effect can be expected since the outer diameter side is more likely to vibrate than the inner diameter side.

  Moreover, although the double-sided tape is used in the above-described embodiment, the adhesive may of course be an adhesive other than the double-sided tape.

  Moreover, it is also possible to acquire the effect according to the said embodiment by aspects other than adhesion | attachment.

  For example, as shown in FIG. 11, the silencer plate 7 is attached to the surface on the counter pressure contact side with respect to the attachment target plate in a state where the contact surfaces are partially connected using a connecting tool 70 such as a bolt. You may do it. At that time, the partially silenced plates 7 are balanced by weight compensation means 61 such as a stealer or a balancer as necessary so that the center of mass including the coupler 70 is substantially on the axis m. And only the connection position by the connector 60 may be attached in an unbalanced state around the axis m.

  Also in this case, when a plurality of sound deadening plates 7 are attached to the surface to be attached to the plate to be attached, the above-described connecting tool is introduced between the contact surfaces of the sound deadening plates 7 to provide an axial center. A similar effect can be obtained by attaching the components in an unbalanced state.

  Furthermore, the application itself of the electromagnetic coupling device according to the present invention is not limited to the above embodiment.

  That is, in the electromagnetic brake B to which the electromagnetic coupling device of the above embodiment is applied, one of the pair of plates is the rotating plate 1 that can rotate integrally with the rotating shaft S of the motor M, and the other brakes the rotating plate 1. An armature 2 that is a braking plate that makes contact with and separates from the rotating plate 1 by excitation so as to apply torque, and a silencer plate on the surface opposite to the pressure-contact side of the rotating plate 1 and between the contact surfaces or a laminated silencer plate The plates were attached in a partially bonded state.

  On the other hand, as shown in FIG. 12, one of the pair of plates is a drive side clutch plate 101 constituting a clutch, and the other is to transmit drive torque to the drive side clutch plate 101. It is also effective to apply the present invention as the driven clutch plate 102 that is arranged so as to be relatively close to and away from. That is, at least the clutch plate 101, 102 (the driven clutch plate 102 in the figure) on the surface opposite to the pressure-contact side is provided with a silencer plate 105 via a leaf spring 103 and a retainer 104, and between the contact surfaces of the retainer 104 and the silencer plate 105. Is attached in a partially bonded or connected state, or when a plurality of silencer plates are introduced, it can be effectively used as a countermeasure against the noise of an electromagnetic clutch if the sound absorbing plates are attached in a partially bonded or connected state. be able to. In the illustrated example, the driven clutch plate 101 is attracted by the excitation of the electromagnetic drive means 103 and the shafts 106 and 107 are connected to each other, and is decoupled by the leaf spring 103 by demagnetization.

  Note that, as in this example, the sound deadening plate 105 is not limited to being directly attached to the attachment target plate 102 but may be indirectly attached. The same applies to the electromagnetic brake B and the like attached to the induction motor of the above embodiment.

  Alternatively, as shown in FIG. 13, one of the pair of plates can be a rotating disk 201 that constitutes an electromagnetic disk brake, and the other can be changed in distance so as to apply braking torque with the rotating disk 201 sandwiched from both sides. It is also effective to apply the present invention as a set of brake disks 202 and 202 to be arranged. That is, when the silencing plate 203 is attached to the surface opposite to the pressure-contact side of the brake disc 202 with the contact surfaces of the brake disc 202 and the silencing plate 203 partially bonded or connected, or a plurality of silencing plates are introduced. If it is attached in a state where the sound deadening plates are partially bonded or connected, it can be effectively used as a measure against the noise of the electromagnetic disc brake. In the illustrated example, the distance between the brake disks 202 and 202 is opened by the excitation of the electromagnetic drive means 203 and the rotary disk 201 is opened, and the distance between the brake disks 202 is reduced by a compression spring (not shown) by demagnetization. The rotating disk 201 is contracted together with the driven operation so that the rotating disk 201 is sandwiched between the braking disks 202 and 202 from both sides.

  Other configurations can be variously modified without departing from the spirit of the present invention.

The longitudinal cross-sectional view of the electromagnetic brake to which the electromagnetic coupling device which concerns on one Embodiment of this invention is applied. The block diagram of the armature which is a brake plate which comprises the electromagnetic brake. The block diagram of the rotating plate which comprises the electromagnetic brake. The block diagram of the 1st sound deadening plate which comprises the electromagnetic brake. The block diagram of the 2nd silence plate which comprises the electromagnetic brake. The block diagram which shows the measuring apparatus for the vibration and noise test with respect to the electromagnetic brake. The figure which shows the measurement data of the conventional structure using the apparatus of FIG. The figure which shows the measurement data of the same embodiment using the apparatus of FIG. The figure which shows the other measurement data of the same embodiment using the apparatus of FIG. The figure which shows the modification of this invention. The figure which shows the other modification of this invention. The figure which shows the other example of application of this invention. The figure which shows the further another example of application of this invention.

Explanation of symbols

1 ... Rotating plate 2 ... Brake plate (armature)
DESCRIPTION OF SYMBOLS 3 ... Electromagnetic drive means 4 ... 1st silence plate 5 ... 2nd silence plate 6 ... Silence plate 60 ... Connection tool 101,102 ... Plate 105 ... Silence plate 201, 202 ... Plate 203 ... Silence plate A ... Fan-shaped area m ... axis

Claims (11)

It has a pair of plates facing each other on the same axis, and electromagnetic drive means for moving these two plates relative to and away from each other in the axial direction, and there is a relative angular velocity difference between the plates when dissociating. In what is configured to press-contact both plates through on-off switching operation of electromagnetic drive means from the state,
An electromagnetic coupling device characterized in that at least one of the plates is used as an attachment target plate, and a silencer plate is attached to a surface on the side opposite to the pressure contact side in a state where the contact surfaces are partially adhered. It has a pair of plates facing each other on the same axis, and electromagnetic drive means for moving these two plates relative to and away from each other in the axial direction, and there is a relative angular velocity difference between the plates when dissociating. In what is configured to press-contact both plates through on-off switching operation of electromagnetic drive means from the state,
It is characterized in that at least one of the plates is set as a mounting target plate, and a plurality of sound deadening plates are attached to a surface on the side opposite to the pressure-welded side by being superposed in a state where the contact surfaces between the sound deadening plates are partially adhered. Electromagnetic coupling device. The electromagnetic coupling device according to claim 1, wherein the silencer plate to be partially bonded is attached in a state where the center of mass is substantially on the axis and the bonding position is unbalanced around the axis. The electromagnetic coupling device according to claim 3, wherein the silencer plate to be partially bonded is bonded to a fan-shaped region with the axis as a base point. 3. The electromagnetic wave according to claim 1, wherein the silencer plate to be partially bonded has a center of mass substantially on the axis and is bonded in an unbalanced state between the inner diameter side and the outer diameter side. Connecting device. 6. The electromagnetic coupling device according to claim 5, wherein the inner diameter side is bonded and the outer diameter side is opened without bonding. It has a pair of plates facing each other on the same axis, and electromagnetic drive means for moving these two plates relative to and away from each other in the axial direction, and there is a relative angular velocity difference between the plates when dissociating. In what is configured to press-contact both plates through on-off switching operation of electromagnetic drive means from the state,
At least one of the plates is used as a mounting target plate, and a silencer plate is attached to the surface opposite to the pressure-welding side in a state where the contact surfaces are partially connected using a connector. The silencer plate coupled to the electromagnetic coupling device is characterized in that the center of mass including the coupling tool is substantially on the axis, and the coupling position by the coupling tool is attached in an unbalanced state around the axis. It has a pair of plates facing each other on the same axis, and electromagnetic drive means for moving these two plates relative to and away from each other in the axial direction, and there is a relative angular velocity difference between the plates when dissociating. In what is configured to press-contact both plates through on-off switching operation of electromagnetic drive means from the state,
At least one of the plates is an attachment target plate, and a plurality of silencer plates are attached to the surface opposite to the pressure contact side by superposing them in a state where the contact surfaces of the silencer plates are partially adhered. The silencer plate coupled to the electromagnetic coupling device is characterized in that the center of mass including the coupling tool is substantially on the axis, and the coupling position by the coupling tool is attached in an unbalanced state around the axis. One of the pair of plates is a rotating plate that can rotate integrally with the rotating shaft of the motor, and the other is a braking plate that performs contact with and separation from the rotating plate by excitation so as to apply a braking torque to the rotating plate. Item 9. The electromagnetic coupling device according to any one of Items 1 to 8. Of the pair of plates, one is a drive-side clutch plate that constitutes a clutch, and the other is a driven side that is arranged so as to be able to contact and separate relatively to transmit drive torque to the drive-side clutch plate. It is a clutch board, The electromagnetic coupling device in any one of Claims 1-8. One of the pair of plates is a rotating disk constituting a disk brake, and the other is a set of braking disks arranged so that a separation distance can be changed so as to apply a braking torque with the rotating disk sandwiched from both sides. Item 9. The electromagnetic coupling device according to any one of Items 1 to 8.

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