JP5966336B2 - Electromagnetic coupling device - Google Patents

Description

  The present invention relates to an electromagnetic coupling device that has a simple structure and optimizes the attachment of a coil bobbin.

  Conventionally, in an electromagnetic coupling device, as a structure for fixing a coil bobbin to a yoke, there has been known a method in which resin or adhesive is poured into a coil bobbin around which a coil is wound and these coils and coil bobbin are integrally fixed to the yoke. For example, it is disclosed also in patent document 1. FIG.

  Further, as a structure not using resin, as disclosed in Patent Document 2, a yoke called a brake core for housing a bobbin is provided with a locking portion for fixing a coil bobbin, or a yoke. There is known a method of knurling any one of the contact surfaces between the coil bobbin and the coil bobbin and press-fitting the coil bobbin into the yoke.

JP-A-7-238958 JP-A-5-256330

  However, the structure in which a resin, an adhesive, or the like is poured into the coil bobbin has a problem that it takes time until the resin, the adhesive, etc. are cured, and also costs for the use of the resin material, the number of man-hours, and the drying furnace are required.

  In addition, the structure disclosed in Patent Document 2 not only takes time for parts processing but also prevents dust and conductive friction powder generated during friction of the friction plate of the electromagnetic coupling device. Can not. In addition, the coil bobbin may be cracked or a copper wire film may be damaged.

  An object of the present invention is to provide an electromagnetic coupling device that eliminates such problems and eliminates the troublesome processing and fixing of a resin bobbin or the like when fixing a coil bobbin to a yoke.

  The present invention takes the following measures in view of the above problems.

  That is, the electromagnetic coupling device of the present invention includes a coil bobbin having a pair of flanges at the ends and a coil wound between the flanges, and an annular shape opened to one side between the shaft center part and the peripheral wall part. A yoke having the coil bobbin mounted in the recess, an armature disposed opposite to the yoke, a disk and an end plate disposed at positions opposed to the armature, and between the end plate and the yoke. A collar that secures an armature and a disk to be moved through and a connecting member that connects the end plate and the yoke via the collar, and at least a part of the collar. Is provided in a relative positional relationship so as to prevent the coil bobbin from coming off from the concave portion of the yoke.

  In this way, since the coil bobbin can be prevented from coming off only by the positional relationship of the existing parts, it is possible to eliminate the need for injection of resin, adhesive, etc., including processing for fixing the coil bobbin to the yoke.

  Here, the retaining of the coil bobbin means that the collar is prevented from being pulled out by interfering with the bobbin at least a part of which is intended to be pulled out from the concave portion of the yoke.

In addition, in order to prevent dust and brake wear powder from entering the coil bobbin, the present invention is such that the outer peripheral edge portion of the flange portion of the coil bobbin is overlapped in the radial direction with respect to the inner peripheral wall of the yoke. It is characterized by .

Further, the present invention in order to eliminate the thrust direction of the backlash of the coil bobbin is characterized in that is brought into contact with an end portion of the collar to the flange portion of the coil bobbin.

In addition, the present invention is characterized in that a second collar part in the thrust direction is provided on the outer peripheral edge of the collar part of the coil bobbin in order to prevent generation of a gap due to distortion deformation of the coil bobbin.

  Furthermore, in order to fix the coil bobbin appropriately with the yoke, it is desirable that the second collar portion is provided with a notch portion that engages with the outer peripheral surface of the collar.

  As described above, according to the present invention described above, the coil bobbin can be prevented from coming off simply by adjusting the positional relationship of the existing parts, and injection of resin, adhesive or the like including troublesome processing for fixing the coil bobbin to the yoke is possible. It is possible to provide an electromagnetic coupling device that is unnecessary.

The perspective view which shows the state which mounted | wore with the coil bobbin in the yoke which comprises the electromagnetic coupling device of this embodiment. The whole perspective view which shows the electromagnetic coupling device in an assembly state. FIG. 3 is a longitudinal side view taken along the line AA in FIG. 2 of the electromagnetic coupling device. The perspective view which shows the yoke before coil bobbin mounting | wearing in the same electromagnetic coupling device. The perspective view which shows the coil bobbin in the same electromagnetic coupling device.

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

  As shown in FIG. 2 and FIG. 3, the electromagnetic coupling device 1 of the present embodiment is open to one side between the coil 4, the coil bobbin 3 around which the coil 4 is wound, and the shaft center portion 21 and the peripheral wall portion 22. It has a bottomed annular recess 2f (see FIG. 4) and a yoke 2 on which a coil bobbin 3 is mounted. The yoke 2 constitutes one side end portion of the electromagnetic coupling device 1, and an end plate 5 as a side plate is located on the side end portion opposite to the yoke 2. Between the yoke 2 and the end plate 5, the armature 6 and the disk 10 are arranged from the yoke 2 side, and three collars 8 to 8 for securing the armature 6 and the disk 10 to move are provided with the end plate 5. It is interposed between the yokes 2. Further, three screws 7 to 7 which are connecting members for connecting the end plate 5 and the yoke 2 through the collars 8 to 8 are provided. The connecting tool is not limited to this, and other connecting tools such as bolts may be used.

  The yoke 2, the armature 6, the disk 10, and the end plate 5 are all annular members, and are configured such that a rotating shaft 14 is inserted into the inner diameter portion from the outside. The rotary shaft 14 is rotatably fixed.

  As shown in FIG. 5, the coil bobbin 3 is made of a flexible material such as resin or plastic, and includes a cylindrical portion 3 a and annular flange portions 3 b and 3 c that expand at both ends thereof. The coil 4 (see FIG. 3) is wound around a recess formed in a state of opening and turning between the cylindrical portion 3a and the flange portions 3b and 3c. Here, the flange part of the coil bobbin 3 located on the opening side of the yoke 2 when mounted on the yoke 2 is 3b, and the opposite flange part is 3c.

  The yoke 2 on which the coil bobbin 3 is mounted as shown in FIG. 1 is a ferromagnetic material such as iron. As shown in FIG. 4, the end face 2a on the armature 6 (see FIG. 2) side of the yoke 2 has a coil spring CS (see FIG. 1). 3) are provided at six locations, each of which accommodates a coil spring CS, and these six coil springs CS are arranged opposite to the end plate 5 side. 6 is always urged away from the yoke 2. In addition, as shown in FIG. 1, the end face 2a of the yoke 2 has a collar mounting groove for accommodating collars 8 to 8 (only two are shown in the drawing) at three positions at intervals of 120 degrees in the circumferential direction. 2d to 2d are provided.

  As shown in FIG. 2, an armature 6, which is a magnetic body, is disposed in opposition to the yoke 2 in a state of being urged by the yoke 2, and a collar mounting groove of the yoke 2 is disposed on the outer peripheral edge of the armature 6. Three cutout portions 6a for engaging the collar 8 are provided at positions corresponding to 2d.

  A disk 10 is disposed opposite to the end plate 5 side of the armature 6. The disk 10 is an annular flat plate, and is a non-magnetic material having a substantially square inner periphery.

  A hub 11 whose outer shape is an annular member having a substantially quadrangular prism shape and whose inner peripheral shape is circular is fitted to a substantially rectangular inner peripheral portion of the disk 10.

  The hub 11 is connected to an external rotary shaft 14 (see FIG. 3) by, for example, a key or gear teeth (not shown), and the disk 10 is also configured to be rotatable via the hub 11.

  The end plate 5 is located at the side end of the electromagnetic coupling device 1, and three screw holes are provided at positions corresponding to the screw holes in the notch 6 a of the armature 6 and the collar mounting groove 2 d of the yoke 2.

  The collar 8 is a hollow cylindrical member, which is made of stainless steel, for example, and is an auxiliary member for fixing a member with a gap by inserting a screw or the like through the hollow portion as shown in FIG. Here, the outer peripheral surface is 8a and the end is 8b. The shape and material of the color are not limited to this, and can be variously changed according to the use environment.

  When the end plate 5 is fixed to the yoke 2, as shown in FIG. 1, the collar 8 is mounted in the collar mounting groove 2d, and the notch 6a of the armature 6 is engaged with the collar 8 as shown in FIG. 3 together with the disk 10 fixed to the external rotary shaft 14 shown in FIG. 3 through the hub 11, and the rotary shaft 14 is inserted into the inner diameter portion of the yoke 2. Finally, the collar 8 is inserted into the screw hole of the end plate 5. The other end portion 8b is matched, and the screw 7 is inserted into the collar 8 and screwed into a screw hole provided in the groove bottom of the collar mounting groove 2d of the yoke end surface 2a to be fixed. At this time, by engaging the collar 8 with the notch 6a of the armature 6 between the end plate 5 and the yoke 2, the armature 6 is fixed so as to be movable in the thrust direction and not rotatable in the circumferential direction. The The disk 10 that is rotatably fixed to the rotary shaft 14 via the hub 11 is sandwiched between the armature 6 and the end plate 5, and the diameter is limited so as not to contact the collar 8.

  In such a configuration, the present embodiment further employs the following configuration.

As shown in FIG. 5, a thrust rising is provided from the outer peripheral edge of the flange 3b of the coil bobbin 3 to the outside of the coil bobbin 3, and this is used as the second flange 3d. Three cutout portions 3g to 3g are provided at the place of placement. Further, as shown in FIG. 4, the inner peripheral wall of the yoke 2 is recessed on the outer peripheral side, and a meat stealing is provided vertically from the yoke end surface 2a over the length L to newly provide a step 2c between the original inner periphery and the step 2c. The original inner peripheral wall described above is referred to as a first inner peripheral wall 2e ₁ , and the newly formed inner peripheral wall is referred to as a second inner peripheral wall 2e ₂ . Here, as shown in FIG. 5, the length L is set to be approximately equal to the length of the outer portion 3 e of the second flange portion 3 d of the coil bobbin 3.

  Also, as shown in FIGS. 1 and 3, the collar 8 is moved in the inner diameter direction of the yoke 2, and at least a part of the outer peripheral portion 8a of the collar 8 is the outermost diameter portion of the coil bobbin 3, that is, the first It is configured to be located inside the outer portion 3e (see FIG. 5) of the second flange portion 3d. At this time, the screw 7 through which the collar 8 is inserted is fixed to the yoke 2 by screwing as usual.

On the other hand, with the movement of the installation position of the collar 8, the shape is newly changed on the side of the yoke 2 corresponding thereto. Specifically, as shown in FIGS. 1 and 4, the installation position of the collar 8 is moved to the inner diameter side of the yoke 2, and the collar 8 is positioned so as to protrude inside the second inner peripheral wall 2 e ₂ of the yoke 2. As described above, the collar mounting grooves 2d to 2d are partially opened on the yoke end surface 2a, and are provided at three locations at 120 degree intervals in the circumferential direction.

  In accordance with this, the shape of the notch 3g of the second flange portion 3d of the coil bobbin 3 described above with reference to FIG. 5 is adapted to the shape of the collar 8 protruding inward from the yoke 2 as shown in FIG. At the time of installation, the end 8b of the collar 8 is simultaneously engaged with the notch 3g and the collar mounting groove 2d. That is, both are arranged so that the collar 8 has a relative positional relationship with the coil bobbin 3 so as to prevent the coil bobbin 3 from coming off.

  The operation of the electromagnetic coupling device 1 in this embodiment configured as described above is basically the same as that of the conventional electromagnetic coupling device, and is installed in the six coil spring holes 2b to 2b of the yoke end surface 2a when not energized. The armature 6 on which the six coil springs CS are opposed to each other is urged toward the disk 10, and the armature 6 presses the disk 10 to exert a braking effect. On the other hand, when energized, a magnetic field is generated in the coil 4 of FIG. 3 and the armature 6 is attracted to the yoke 2 against the urging force of the coil spring CS, so that the armature 6 releases the pressure contact with the disk 10. Then, the disk 10 rotates together with the rotating shaft 14.

In the present embodiment, as shown in FIG. 4, a step 2c formed on the inner peripheral wall of the yoke 2, the second second inner circumferential wall 2e ₂ and the coil bobbin 3 in the recess formed by the step 2c formed thereby By engaging the flange portion 3d (see FIG. 5), the step 2c of the yoke 2 serves as a strong back support for the second flange portion 3d of the coil bobbin 3 that is easily bent, and the deformation of the coil bobbin 3 is prevented.

  In addition, as an excellent point of the present embodiment, the structural change of the present embodiment can be formed by a slight additional processing by a cutting machine such as a lathe or a milling machine, and these two cutting machines can be used for processing of a conventional yoke. Because it was also used, the man-hour for setting is not added, and the cost is hardly increased.

  As described above, the electromagnetic coupling device 1 according to the present embodiment includes the coil bobbin 3 having the pair of flange portions 3b and 3c at the ends and the coil 4 wound between the flange portions 3b and 3c, and the shaft. A yoke 2 having an annular recess 2f opened on one side between the core portion 21 and the peripheral wall portion 22 and having the coil bobbin 3 attached to the recess 2f, an armature 6 disposed opposite to the yoke 2, and the armature 6, the disk 10 and the end plate 5 that are arranged at opposite positions, a collar 8 that is interposed between the end plate 5 and the yoke 2 and secures a margin for movement of the armature 6 and the disk 10, and the collar 8 The collar 8 is provided with a screw 7 which is a connecting member for connecting the end plate 5 and the yoke 2, and at least a part of the collar 8 is a coil bobbin from the recess 2 f of the yoke 2. The coil bobbin 3 can be prevented from being removed by the collar 8 by slightly changing the positional relationship of the existing parts, so that the coil bobbin 3 can be prevented from coming off. It is possible to eliminate the need for injection of a resin, an adhesive, etc., as well as processing for fixing to the yoke 2.

  Further, in the electromagnetic coupling device 1 according to the present embodiment, the outer peripheral edge portion of the flange portion 3b of the coil bobbin 3 is provided so as to overlap in the radial direction with respect to the inner peripheral wall of the yoke 2, so that the coil bobbin 3 and the yoke 2 It is possible to close the gap between them, and it is possible to prevent dust, brake wear powder, and the like from entering the coil bobbin 3. The coil bobbin 3 is usually made of a flexible resin or plastic, and since it is difficult to accurately measure the dimensions in manufacturing and is easily distorted by heat, the outer peripheral edge of the flange 3b of the coil bobbin 3 is thus formed. If the stepped portion 2c of the inner peripheral wall of the yoke 2 is overlapped in the radial direction, even if a slight dimensional error occurs in the flange portion 3b of the coil bobbin 3, a gap will not be generated, so It is effective to wrap.

  Further, in the electromagnetic coupling device 1 according to the present embodiment, the end portions 8b to 8b of the collar 8 are brought into contact with the flange portion 3b of the coil bobbin 3, and the coil bobbin 3 is thrust in the recess 2f of the yoke 2 on which the coil bobbin 3 is mounted. Since the movement in the direction is restricted, the coil bobbin 3 is not rattled in the same direction, and can be more securely fixed to the yoke 2. If the coil bobbin 3 is loose, for example, the lead wire 13 connected to the coil 4 may be broken, so that the end portions 8b to 8b of the collar 8 are brought into contact with the flange portion 3b of the coil bobbin 3 in this way. Has an excellent effect.

  Furthermore, since the electromagnetic coupling device 1 according to the present embodiment includes the second collar part 3d in the thrust direction on the outer peripheral edge of the collar part 3b of the coil bobbin 3, the strength of the collar part 3b is increased by the second collar part 3d. Even if it rises, even if the flange 3b of the coil bobbin 3 is distorted due to heat generation and tilted toward the coil 4, the second flange 3d is engaged with the step 2c of the yoke 2 to prevent the generation of a gap. It becomes possible to do.

  In addition, since the electromagnetic coupling device 1 according to the present embodiment is configured by including the notches 3g to 3g in the second flange portion 3d, the coil bobbin 3 is prevented from rotating in the circumferential direction. It became possible to fix to the yoke 2 appropriately through the collars 8-8.

  As mentioned above, although one Embodiment of this invention was described, the specific structure of each part is not limited only to embodiment mentioned above.

  For example, in the above embodiment, the outer peripheral edge portion of the flange portion of the coil bobbin is provided by being overlapped in the radial direction with respect to the inner peripheral wall of the yoke. There may be a gap between the outer peripheral edge of the flange and the inner peripheral wall of the yoke.

  Further, in the above embodiment, the end of the collar is fixed in contact with the flange of the coil bobbin, but if the coil bobbin is slightly loose in the axial direction, the end of the collar is You may just make it adjoin to the collar part of the said coil bobbin.

  Furthermore, when a certain degree of strength can be expected at the flange portion of the coil bobbin, it is always necessary to provide a second flange portion on the outer peripheral edge portion of the flange portion, or to provide a notch portion on the second flange portion. do not do.

  Furthermore, in this embodiment, in order to fix the end plate 5 to the yoke 2, the end plate 5 and the yoke 2 are provided with three places of the collars 8 to 8. However, if a desired effect can be obtained. Or, on the contrary, if a stronger fixation is required, some of the collar mounting portions can be omitted or added according to the use environment. Accordingly, the cutout portion of the armature at the position corresponding to the above can be omitted or added.

  In addition, in this embodiment, the notches 6a to 6a for engaging the collars 8 to 8 are provided in the armature 6. However, if the braking force of the disk may be sacrificed somewhat, the diameter of the disk is reduced. Then, the cutout portion of the armature may be a through hole.

  In addition to the above, the specific configuration of each part is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Electromagnetic coupling device 2 ... Yoke 2e ₁ ... (inner peripheral wall) 1st inner peripheral wall 2f ... Recessed part 3 ... Coil bobbin 3b, 3c ... collar part 3d ... 2nd collar 3g ... Notch 4 ... Coil 5 ... End plate 6 ... Armature 7 ... Connecting tool (screw)
8 ... Collar 8b ... End 10 ... Disc 21 ... Axle 22 ... Peripheral wall

Claims (4)

A coil bobbin having a pair of flanges at the ends and having a coil wound between the flanges;
A yoke having an annular recess opened on one side between the shaft center portion and the peripheral wall portion, and the coil bobbin mounted on the recess;
An armature disposed opposite the yoke;
A disk and an end plate disposed at opposite positions of the armature;
A collar that is interposed between the end plate and the yoke to secure the armature and the disk to move;
In what comprises the connecting tool that connects the end plate and the yoke through this collar,
The collar is provided in a relative positional relationship such that at least a part thereof serves to prevent the coil bobbin from coming off from the concave portion of the yoke ,
An electromagnetic coupling device , characterized in that an outer peripheral edge portion of a flange portion of the coil bobbin is provided by being overlapped in a radial direction with respect to an inner peripheral wall of the yoke . A coil bobbin having a pair of flanges at the ends and having a coil wound between the flanges;
A yoke having an annular recess opened on one side between the shaft center portion and the peripheral wall portion, and the coil bobbin mounted on the recess;
An armature disposed opposite the yoke;
A disk and an end plate disposed at opposite positions of the armature;
A collar that is interposed between the end plate and the yoke to secure the armature and the disk to move;
In what comprises the connecting tool that connects the end plate and the yoke through this collar,
The collar is provided in a relative positional relationship such that at least a part thereof serves to prevent the coil bobbin from coming off from the concave portion of the yoke,
An electromagnetic coupling device , wherein an end portion of the collar is brought into contact with a collar portion of the coil bobbin . A coil bobbin having a pair of flanges at the ends and having a coil wound between the flanges;
A yoke having an annular recess opened on one side between the shaft center portion and the peripheral wall portion, and the coil bobbin mounted on the recess;
An armature disposed opposite the yoke;
A disk and an end plate disposed at opposite positions of the armature;
A collar that is interposed between the end plate and the yoke to secure the armature and the disk to move;
In what comprises the connecting tool that connects the end plate and the yoke through this collar,
The collar is provided in a relative positional relationship such that at least a part thereof serves to prevent the coil bobbin from coming off from the concave portion of the yoke,
An electromagnetic coupling device , wherein a second hook part in the thrust direction is provided on an outer peripheral edge part of the hook part of the coil bobbin . The electromagnetic coupling device according to claim 3, wherein a cutout portion that engages with the outer peripheral surface of the collar is provided in the second collar portion .

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