JPH0226200Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a small motor, more specifically, a rotor plate having a plurality of magnetic poles magnetized along the circumferential direction, and a stator coil that forms the magnetic path of the stator coil. A yoke with a plurality of magnetic poles along the yoke,
This invention relates to the structure of a so-called inductor motor that rotates by passing an alternating current through a stator coil.

[Background technology]

As shown in FIGS. 5 and 6, conventional small motors of this type include a casing 10a that houses the stator coil 5, a rectangular body frame 51 surrounding the stator coil 5, and an axis of the stator coil 5. A motor constructed of an upper base plate 52 and a base plate 53 that close both sides of the main body frame 51 on both sides in the direction is provided, and in a motor with this structure, the main body frame 51, the upper base plate 52, and the base plate 53 are combined. In order to do this, a support 54 is integrally provided on the base plate 53, and the support 54 is inserted into a fixing hole 55 formed through the main body frame 51 in the thickness direction.
4 is connected to the top plate 52. Incidentally, a pair of struts 54 are arranged on one diagonal of the casing 10a, and on the other diagonal there is a mounting hole 12 through which a fixing device such as a screw is inserted in order to attach the casing 10a to another device.
a is provided to penetrate in the thickness direction. Also,
A terminal 11a of the stator coil 5 is drawn out from one side of the main body frame 51. The fixing hole 55 provided in the main body frame 51 and the mounting hole 12a have different opening diameters because the support 54 is inserted into one and the fixing tool is inserted into the other. It cannot be inserted into the attachment hole 12a. Therefore, if you try to attach this motor to a device with the terminal 11a of the stator coil 5 rotated 90 degrees in the circumferential direction of the motor, the device will have to adjust the position of the fixing tool and the mounting hole. It becomes necessary to make changes and installation becomes troublesome. Therefore, it is conceivable to provide the struts 54 at the four corners of the casing, but the struts 54 are
Even though books provide sufficient support strength,
Providing four holes is wasteful, and the mounting holes 12a
Another problem arises in that it takes time and effort to fix the motor to the equipment because it is not provided with a motor. Furthermore, in order to obtain rotation in the opposite direction with this motor, it is necessary to install the motor itself upside down in the thickness direction of the casing 10a, but in this case, the positions of the support column 54 and the mounting hole 12a are interchanged. In the end, the positions of the fixtures and mounting holes on the equipment side had to be changed, and the design of the mounting part on the equipment side was different depending on the motor that rotates forward and the motor that rotates reversely.
Installation is troublesome.

As this type of motor, those having the structure shown in FIGS. 7 and 8 are also provided, and in this motor, a casing 10b containing a stator coil is provided with a casing 10b having a structure that spans both sides in the axial direction of the stator coil. The caulk body 2b and the casing 10b are installed by disposing the yoke body 2a formed in a substantially U-shape, and inserting a fixing device such as a screw into a mounting hole 12b provided through the casing 10b and the yoke body 2b. At the same time, the motor is attached to the equipment. A pair of mounting holes 12b are provided at the base of legs covering both sides of the stator coil in the axial direction in the yoke body 2a, and these holes correspond to a pair of adjacent corners of the casing 10b. Since this yoke body 2b is formed using an iron plate with a thickness of approximately 0.3 mm, the yoke body 2b may be deformed if the fixture is inserted with force, and the deformation due to the fixture inserted into the mounting hole 12b may occur. In order to prevent this, it is necessary to provide attachment holes 12b near the bases of the leg pieces reinforced by the body pieces. Therefore, it is not possible to provide the mounting holes 12b at the four corners of a motor with this structure, and if you try to install it by rotating it by 90 degrees in the circumferential direction, the motor will be installed in the same way as the motor with the above-mentioned structure. The design of the mounting parts on the sides will be different, making installation difficult.

[Purpose of invention]

The present invention was developed in view of the above points, and its main purpose is to attach the casing to the equipment with the casing rotated 90 degrees in the circumferential direction. The purpose is to provide a small motor that does not require changing the positions of holes or fixtures, and another purpose is to provide a motor that rotates in the forward direction and a motor that rotates in the reverse direction, both of which can be constructed from the same material, and which has a mounting structure. An object of the present invention is to provide a small motor in which the same values are achieved.

[Disclosure of invention]

In the present invention, the yoke includes a yoke tube that is inserted into the stator coil, a yoke body that is magnetically coupled to one end of the yoke tube and formed in a substantially U-shape along the outer circumference of the casing, and a yoke body that is magnetically coupled to one end of the yoke tube and formed in a substantially U-shape along the outer periphery of the casing. It consists of a yoke plate that is magnetically coupled and arranged to straddle between both legs of the yoke body, and a plurality of locks are provided at either the tip of both legs of the yoke body or the side edge of the yoke plate. The pawls are provided protrudingly, and a plurality of locking grooves are formed on one of the other at positions corresponding to the locking pawls, and when the locking pawls are caulked and fixed to the locking grooves, the yoke body and the yoke plate are connected to the casing. The casing is joined together in a manner that retains the casing, and each corner of the casing is provided with a mounting hole that penetrates in the thickness direction of the casing. Disclosed is a small motor that does not require changing the position of a mounting hole or fixture provided on the equipment side when it is attached to the equipment.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. The coil block 1 is constructed by housing a stator coil (not shown) in a casing 10.
As shown in FIG. 1, the casing 10 has a thin box shape with a substantially square bottom, and the stator coil is wound around an axis perpendicular to both bottoms. From one side of the casing 10, the terminal 1 of the stator coil
1 is drawn. Attachment holes 12 passing through the casing 10 in the thickness direction are formed at the four corners of the bottom surface of the casing 10, and a locking step 13 is formed at one end of the attachment hole 12, and a locking step 13 is formed at the other end. A holding protrusion 14 is provided on the surface of the casing 10 in a protruding manner. A shaft hole 1 penetrating in the thickness direction is provided in the center of the bottom surface of the casing 10.
5 is open, and a yoke tube 21 formed of a magnetic material is inserted into the shaft hole 15. The yoke cylinder 21 constitutes the yoke 2 by a yoke body 22 and a yoke plate 23 disposed at both ends in the axial direction. The yoke body 22 is formed in a substantially U-shape that is open in the axial direction of the yoke tube 21, and a fitting hole 24 that fits into one end of the yoke tube 21 is formed in the center of the body piece. Two locking claws 25 extend from the tips of each piece. On the other hand, locking grooves 26 are provided at positions corresponding to the locking claws 25 of the yoke body 22 on both left and right edges of the yoke plate 23.
is formed. A fitting hole 27 that fits into the other end of the yoke tube 21 is formed in the center of the yoke plate 23, and a plurality of magnetic pole pieces 2 are formed on the periphery of the fitting hole 27.
8 are formed along the circumferential direction. magnetic pole piece 28
As shown in FIG. 4, a part of the yoke plate 23 is punched out in a labyrinth shape to have magnetic pole pieces 28 protruding alternately from the inside and outside of the yoke plate 23. Pole piece 28 and its pole piece 2
8, the spacing between adjacent magnetic pole pieces 28 in the circumferential direction is different on the left and right sides. Furthermore, a bridge portion 29 is provided at a suitable location on the yoke plate 23, and the inner and outer portions of the yoke plate 23 are communicated via the bridge portion 29. However, when fixing the yoke 2 to the casing 10, the yoke cylinder 21 is inserted into the shaft hole 15 of the casing 10, and the leg pieces of the yoke body 22 are inserted into the holding grooves 31 formed on both sides of the casing 10. The yoke body 22 is fitted to the casing 10
When the locking claws 25 of the yoke body 22 are fitted into the locking grooves 26 of the yoke plate 23 and swaged, the yoke tube 21, the yoke body 22, and the yoke plate 23 are integrated while holding the casing 10. It will be transformed into Here, since the legs of the yoke body 22 fit into the holding grooves 31, the yoke body 22 is prevented from wobbling. Further, on one surface of the casing 10 where the yoke plate 23 is disposed, ribs 16 are provided on both sides perpendicular to the locking groove 26 to connect the holding protrusions 14, and the yoke plate is provided between both ribs 16. 23 prevents the yoke plate 23 from wobbling. The yoke plate 23 has cutout grooves 32 at the four corners.
is formed, and this notch groove 32 corresponds to the attachment hole 12 of the casing 10. As described above, a magnetic path is closed by the yoke tube 21, the yoke body 22, and the yoke plate 23, and when the stator coil is energized, the magnetic pole pieces 28 adjacent in the circumferential direction become magnetic poles of different polarities. A bearing 33 is inserted through the yoke cylinder 21, and one end of a rotating shaft 34 is inserted through the bearing 33. A disk-shaped rotor plate 35 is integrally fixed to the rotating shaft 34 to constitute the rotor 3.
5 is magnetized into a plurality of poles (for example, 16 poles) along the circumferential direction. A rotor 35 is provided at the other end of the rotating shaft 34.
A pinion 36 is provided for taking out rotational output. With the rotating shaft 34 inserted into the bearing 33, the magnetic poles of the rotor plate 35 and the magnetic pole pieces 28 of the yoke plate 23
are arranged to face each other, and when an alternating current is applied to the stator coil, the rotor plate 35 rotates in synchronization with the alternating current. The rotor 3 is a rotating shaft 34
It is prevented from coming off by appropriate means such as attaching an E-ring to the. The yoke plate 23 can be attached with the front and back reversed, and when the front and back are reversed, the arrangement of the magnetic pole pieces 28 is reversed, and the direction of rotation of the rotor 3 can be reversed. That is, the direction of rotation of the rotor 3 can be reversed by simply turning over the yoke plate 23. Therefore, when attaching a motor to a device, it is possible to attach a motor that rotates in either forward or reverse direction by using the same mounting structure.

As shown in FIG. 2, the motor A configured as described above has a thin box shape, and the pinion 36 for taking out the output protrudes from one bottom surface of the casing 10, and the four corners have mounting holes protruding in the thickness direction. 12. However, when attaching it to a desired device, such as when using it as a motor to drive a timer of a rice cooker, a hook 41 is formed at the tip end from the mounting surface of the device 40, as shown in FIG. If the mounting leg 42 is inserted into the mounting hole 12 of the motor A, the hook 41 is locked to the locking step 13, and the tip surface of the holding protrusion 14 is The motor A contacts the device 40 and is fixed to the device 40 so that it does not wobble. Here, the mounting legs 42 are 4 of motor A.
Four holes may be provided corresponding to all of the mounting holes 12, or only two holes may be provided corresponding to one diagonal mounting hole 12. In either case, the tip surface of the holding projection 14 is By coming into contact with the device 40, the motor A is fixed to the device 40 without wobbling.

[Effects of the Invention] As described above, the present invention includes a yoke tube in which the yoke is inserted into the stator coil, and a yoke body magnetically coupled to one end of the yoke tube and formed in a substantially U-shape along the outer circumference of the casing. , and a yoke plate which is magnetically coupled to the other end of the yoke cylinder and is arranged to straddle between both legs of the yoke body, and between the tips of both legs of the yoke body and the side edges of the yoke plate. A plurality of locking pawls are provided protrudingly on one of the two, a plurality of locking grooves are formed on the other at positions corresponding to the locking pawls, and the locking pawl is caulked and fixed in the locking groove. As a result, the yoke body and the yoke plate are integrally connected while holding the casing, and each corner of the casing is provided with a mounting hole that penetrates in the thickness direction of the casing. It has the advantage that when it is attached to a device in a rotated form, there is no need to change the position of the mounting hole or fixture provided on the device side. In addition, since the yoke is composed of a yoke tube, a yoke body, and a yoke plate,
By reversing the front and back sides of the yoke plate, the direction of rotation of the rotor can be reversed, and a motor that rotates forward and a motor that rotates reverse can be easily configured using the same member, and as a result, This has the advantage that a motor that rotates forward and a motor that rotates reverse can be attached to the same mounting structure.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
Figure 2 is a perspective view of the same as the above after assembly, Figure 3 is a partial sectional view showing the attachment part to the equipment of the same, Figure 4 is an exploded view showing the structure of the magnetic pole piece of the yoke plate used in the above. 5 is a perspective view showing a conventional example, FIG. 6 is an exploded perspective view of the same as the above, FIG. 7 is a perspective view of another conventional example, and FIG. 8 is an exploded perspective view of the same. 1 is a coil block, 2 is a yoke, 3 is a rotor, 10 is a casing, 12 is a mounting hole, 21 is a yoke cylinder, 22 is a yoke body, 23 is a yoke plate, 25
26 is a locking pawl, 26 is a locking groove, 28 is a magnetic pole piece, 34 is a rotating shaft, and 35 is a rotor plate.

Claims (1)

[Scope of utility model registration request] A coil block in which a stator coil is held in a box-shaped casing forms a magnetic path for the magnetism generated by the stator coil, and a plurality of magnetic poles are arranged along the circumferential direction on one end surface in the axial direction of the stator coil. a rotor having a rotating shaft passing through a rotor plate which is arranged substantially parallel to the magnetic poles of the yoke and has a plurality of magnetic poles magnetized along the circumferential direction, and the yoke is inserted into a stator coil. a yoke body that is magnetically coupled to one end of the yoke tube and formed in a substantially U-shape along the outer periphery of the casing, and a yoke body that is magnetically coupled to the other end of the yoke tube and straddles between both legs of the yoke body. A plurality of locking pawls are provided on one of the tips of both legs of the yoke body and a side edge of the yoke plate, and a plurality of locking claws are provided on one of the ends of the legs of the yoke body and a side edge of the yoke plate. A plurality of locking grooves are formed at positions corresponding to the locking pawls, and by caulking and fixing the locking pawls to the locking grooves, the yoke body and the yoke plate are joined together while holding the casing, and the casing A small motor having mounting holes penetrating through the casing in the thickness direction at each corner of the casing.