JP2938534B2 - motor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a motor.

(Prior art)

Conventionally, in a motor that does not have a drive circuit or a control circuit in the motor body, a required (signal) power is supplied to an armature coil (stator coil). The structure is led out of the housing by a method.

Usually, this coil wire is composed of a plurality of wires, and is electrically connected to, for example, a lead wire or one end of a flexible substrate inside the motor. The lead wire or the flexible board is led out of the housing, and is connected to an external device by a connector such as a connector attached to the other end. According to such a method, not only is the man-hour required for the electrical connection between the coil wire and the lead wire or the flexible substrate, but also a wiring method for leading these to the outside of the housing, and insulation treatment with the housing. You also need to consider the above.

As a method of directly leading the coil wire to the outside of the housing, there is a method of attaching a bush on a tube using an insulating material to a lead-out opening of a bracket, and leading the coil wire through the outlet. A method is also known in which the outlet is filled and fixed with an adhesive or a resin mold to fix and lead the coil wire.

In the former method, when deriving a plurality of coil wires, it is difficult to define and determine a predetermined coil wire, and not only requires time and effort when directly connecting to an external device in a later process, There is a possibility of incorrect wiring.

On the other hand, according to the latter method, the above-mentioned problem is solved because the plurality of coil wires are fixed at predetermined positions. However, the time required for fixing the adhesive or the resin mold is required, and since the root of the coil wire is fixed, it is necessary to consider work man-hours and handling such as causing a breakage accident due to metal fatigue due to bending.

[Problems to be solved by the invention]

The present invention has been made in view of the above-described facts, and a main object of the present invention is to make it possible to easily lead each of a plurality of coil wires drawn from an amateur coil to the outside of a housing while ensuring electrical insulation. Another object of the present invention is to provide a motor that can easily determine a derived coil wire.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a housing, a rotor rotatable relative to the housing, a rotor magnet mounted on the rotor, and a rotor magnet opposed to the rotor magnet. A motor having an attached stator, wherein the housing is provided with a coil holding member for leading a coil wire from an armature coil of the stator to the outside of the housing, and the coil holding member is provided in the housing. A bottom wall mounted on the side and a top wall disposed opposite to the bottom wall, and a coil formed by the amateur coil disposed between the bottom wall and the top wall. An outlet space for guiding the line is defined, and a slit communicating with the outlet space is provided between a side portion of the bottom wall portion and a side edge of the top wall portion, and the bottom wall portion and the top wall portion are provided with a slit. One or both coil conductors On the exit side, there are provided guide projections forming openings for individually leading out the coil wires from the lead-out space, and the guide projections provided on the bottom wall or the top wall are provided with the guide projections. The slit and the opening formed by the guide protrusion are communicated between the top wall portion or the bottom wall portion, and the coil wire is inserted into the lead-out opening through the slit, and at the same time, the coil wire is removed from the slit. A gap for guiding to the opening is formed.

[Action]

In the above-described motor, when the coil wire from the armature coil of the stator is derived using the coil holding member provided in the housing, the coil wire is moved from the slit between the top wall portion and the bottom wall portion to the bottom wall. At the same time as inserting the coil wire into the lead-out space between the bottom wall and the top wall, guide this coil wire through the slit through the gap between the guide projection provided on the bottom wall or the top wall and the top wall or the bottom wall. By guiding the coil wire to the opening by the projection, the coil wire is led out of the opening through the lead-out space of the coil holding member.

In this case, it is possible to individually guide the plurality of coil wires from the amateur coil to the opening, and since the individual coil wires can be guided to the opening or the lead-out space through the slit, the coil wire processing is very easily performed. Become
Moreover, the coil wire is not restricted firmly only by its guide opening being defined, and there is play, so that a breakage of the coil wire and the like can be avoided.

〔Example〕

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

FIG. 1 is a sectional view of a motor showing one embodiment of the present invention. Such a motor is, for example, a spindle motor that is used to rotationally drive a 2.5-inch magnetic disk and is incorporated in a magnetic disk device. In addition, the present invention
The same can be applied to other motors other than the spindle motor.

1 is a hub, 2 is a housing, 3 and 4 are bearings, 5 is a stator, 6 is a rotor magnet, 7 is a coil holding member, 8 is an elastic member, 9 is a bearing protection cap, 10 is a magnetic disk, 11 is a clamp member, 12 is a mounting screw.

The donut plate-shaped magnetic disk 10 is mounted on the hub 1, and the periphery of the center hole of the magnetic disk 10 is clamped by the clamp member 11. Then, attach the mounting screw 12 to the female screw hole of the hub 1.
By screwing to 1a, the clamp member 11 is fixed,
As a result, the magnetic disk 10 is fixed to the hub 1.

The hub 1 is made of an aluminum material, a stainless steel material, or the like, and is formed integrally with the shaft portion 1b.

The hub 1 is rotatably supported by the shaft portion 1b and the bearings 3 and 4 fitted on the inner peripheral surface 2a of the cylindrical portion of the housing 2. A rotor magnet 6 is disposed on the inner peripheral surface 1c of the hub 1, and a stator 5 is fixed to the outer peripheral surface 2b of the cylindrical portion of the housing 2 to face the rotor magnet 6. Due to the relative rotation between the rotor magnet 6 and the stator 5, the magnetic disk 10 is driven to rotate integrally with the hub 1.

Generally, the inside of a disk chamber (a chamber for accommodating a magnetic disk) is filled with clean air. Spherical elastic member 8
Closes the through hole 1d of the hub 1 to prevent grease or the like scattered from the bearings 3 and 4 from entering the disk chamber via the female screw hole 1a.

The bearing protection cap 9 is used to prevent foreign matter, rubber, and the like from adhering to the bearing 4 from the outside (the lower region of the housing 2), and to increase the airtightness of the housing 2 by tightly plugging the housing 2 so that the inside of the hub 1 is improved. Of the unclean air and gas remaining in the magnetic disk chamber through the lower part 1e of the hub 1 is prevented. Reference numeral 7 denotes a coil protection member using a resin material such as PBT (polybutylene terephthalate), which is mounted to lead the coil wire 51 drawn out of the stator 5 to the outside of the housing 2.

The coil wire 51 is variously drawn from the stator 5 in accordance with the configuration of the motor. In the present embodiment, for example, X-, Y-, and Z-phase coil wires 51a, 51b, and 51c as a three-phase winding star connection, and a common phase A total of four coil wires 51d (three coil wires are bundled) are drawn out.

FIG. 2 is an enlarged perspective view of a main part of the motor of FIG. 1,
This shows a state in which the hub 1 and the magnetic disk 10 are removed, and the motor is viewed from diagonally above. FIG. 3 is a perspective view of the coil holding member 7 as viewed from the back, and FIG. 4 is a perspective view of the coil holding member 7 of FIG. 2 cut along the line IV-IV. The numbers given to the respective members indicate the same numbers for the same members as those used in FIG.

In FIG. 2, a coil holding member 7 is mounted on the housing 2 and a coil wire pulled out from the stator 5.
51 is led out of the housing 2 through the coil holding member 7.

The coil holding member 7 will be described with reference to FIGS. 3 and 4 together with FIG. 2. The illustrated coil holding member 7 has a substantially triangular bottom wall 71, and is provided at one corner of the bottom wall 71. Is provided with an extension 72 extending linearly. An elongated opening 73 is formed in the bottom wall 71 in the circumferential direction of the motor (FIG. 3).
A top wall portion 74 is arranged corresponding to the opening 73. Protrusions 74a and 74b are provided substantially at the center of the top wall 74. One protrusion 74a protrudes from one end (peripheral end side) of the bottom wall 71, and the other protrusion 74b protrudes from the bottom wall. It protrudes from the other end of 71 (extended portion 72 side). In the embodiment, the lower surface of the top wall portion 74 is located somewhat lower than the upper surface of the bottom wall portion 71.

Press-fit members 7a and 7b that are press-fitted into through holes formed in the housing 2 are provided on the lower surfaces of the top wall 74 and the extension 72. The press-fitting portions 7a and 7b are constituted by a pair of substantially semi-cylindrical projections and are provided with slits so that they can be somewhat elastically deformed in the circumferential direction.
Further, guide walls 75 and 76 projecting upward are provided at the side end portions of the bottom wall portion 71 and the extension portion 72 of the coil holding member 7, and these guide walls 75 and 76 extend along the side end portions. ing.
There are gaps between one guide wall 75 and the top wall 74 and between the other guide wall 76 and the top wall 74, and these gaps serve as slits for inserting coil wires. Guide projections 77 and 78 located on both sides of the protrusion 74a are provided on the bottom wall 71 on the downstream side in the coil wire lead-out direction. Guide protrusion
77 and 78 are substantially elliptical.

When the coil holding member 7 is attached to the housing 2, as can be easily understood from FIGS. 1 and 4, one lead-out space is provided on one side of the press-fitting member 7 a between the bottom wall 71 and the top wall 74. Is defined, and the other outgoing space is defined on the other side.

As can be understood from FIGS. 1 and 4, the X-phase coil wire 51a and the Y-phase coil wire 51b are led out of the housing 2 through one of the lead-out spaces.
And 51b are inserted into the lead-out space through a slit between one end of the top wall portion 74 and the guide wall 75. X-phase coil wire 51a
Is guided from the slit to the opening between the guide projection 77 and the guide wall 75 communicating with the gap through the gap between the top wall portion 74 and the outer end side of the guide wall 75, and the coil wire 51a passes through the opening. Derived outside. Further, the Y-phase coil wire 51b passes through the gap described above from the slit and the gap between the top wall portion 74 and the guide projection 77, and the guide projection 77 and the projection communicate with this gap.
The coil wire 51b is guided to the opening between the opening 74a and the coil wire 51b, and is led out through this opening.

The Z-phase coil wire 51c and the common coil wire 51d are led out of the housing 2 through the other lead-out space, and these coil wires 51c and 51d pass through a slit between the top wall 74 and the other guide wall 76. Inserted into the derived space. The Z-phase coil wire 51c passes through the gap between the top wall 74 and the outer end side of the guide wall 76 and the gap between the top wall 74 and the guide projection 78 from the slit to project the projection 74a and the other guide projection. Guided to the opening between 78 and derived from this opening, common coil wire 51d
Is led out of the slit through a gap between the top wall portion 74 and the outer end side of the guide wall 76 through an opening between the guide projection 78 and the guide wall 76.

As described above, each of the coil wires 51a to 51d is led out from the corresponding portion, so that sufficient insulation can be ensured and the efficiency of the coil wire connection work in the next step is improved. Further, since each of the coil wires 51a to 51d can move relatively to the coil holding member 7, metal fatigue or the like is hardly generated even with a slight movement of the coil wire.

In the embodiment, an auxiliary top wall portion 79 is further provided at a predetermined portion of the guide wall 75. The auxiliary ceiling part 79 is an opposing guide wall
A slit extends between the auxiliary top wall portion 79 and the guide wall 76, and the coil wires 51a to 51d are inserted into the lead-out space through the slit.

In the embodiment, the guide projections 77 and 78 are provided on the bottom wall 71 of the coil holding member 7, but may be provided on the top wall 74 instead. You may make it provide in both of the parts 74.

Further, in the illustrated embodiment, the present invention is applied to a configuration in which four coil wires 51a to 51d are drawn from the stator 5, but the present invention is similarly applicable to a configuration in which three or six coil wires are drawn. it can.

〔The invention's effect〕

Since the present invention has the above-described configuration, the following effects can be obtained.

In the coil holding member provided in the housing, the coil wires can be separated individually and led out of the housing, electrical insulation can be ensured, and no breakage of the coil wire will occur.
In addition, the coil wire can be led out from a desired position using a slit formed between the bottom wall portion and the top wall portion and a gap continuous with the slit, so that the operation is simple, and the workability is improved. A highly reliable motor can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a motor according to the present invention,
FIG. 2 is an enlarged perspective view of a main part of the motor of FIG. 1, FIG. 3 is a perspective view of the coil holding member used in FIG. 2 as viewed from the back, and FIG. It is sectional drawing. DESCRIPTION OF SYMBOLS 1 ... Hub, 2 ... Housing, 3, 4 ... Bearing, 5 ... Stator, 6 ... Rotor magnet, 7 ... Coil holding member,
10 ... magnetic disk, 51a, 51b, 51c, 51d ... coil wire, 71 ...
Bottom wall part, 74 ... top wall part, 77, 78 ... guide projection.

Claims (1)

(57) [Claims] 1. A housing, a rotor rotatable relative to the housing, a rotor magnet mounted on the rotor, and a stator mounted on the housing so as to face the rotor magnet. In the motor, a coil holding member for leading a coil wire from an armature coil of the stator to the outside of the housing is provided in the housing, and the coil holding member is provided on a bottom wall attached to the housing. Portion and a top wall portion disposed opposite to the bottom wall portion, and between the bottom wall portion and the top wall portion, a lead-out space for guiding the coil wire from the amateur coil is provided. A slit communicating with the lead-out space is provided between a side portion of the bottom wall portion and a side edge of the top wall portion, and one or both coils of the bottom wall portion and the top wall portion are led out. On the side, is the derived space Guide projections forming openings for individually leading out the coil wires are provided, and the guide projections provided on the bottom wall or the top wall and the top wall or the bottom wall are provided. A gap for communicating the slit with the opening formed by the guide projection, inserting the coil wire into the lead-out opening through the slit, and simultaneously guiding the coil wire from the slit to the opening. A motor characterized by the following.