JP2653333B2 - How to attach the spindle motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spindle motor mounting method, and more particularly to a spindle motor mounting method capable of easily mounting a spindle motor at an accurate position on a frame.

[0002] A magnetic disk is mounted on a rotating shaft of a spindle motor mounted on a frame. Therefore, in assembling the magnetic disk drive, the positional accuracy of the rotating shaft of the spindle motor is important.

[0003]

2. Description of the Related Art FIG. 8 shows an example of a conventional motor mounting method when a spindle motor 10 for rotating a magnetic disk is mounted on a frame. In the figure, 1 is a frame on which a spindle motor 10 is mounted, 2 is a drive unit, 3 is a spindle rotated by the drive unit 2, 4 is a spindle shaft, 5 is a flange of the drive unit 2, 6 is a drive unit 2.
Is a control board on which a coil and other wiring constituting the above are arranged.

[0004] In the spindle motor 10 described above,
The flange portion 5 and the control board 6 correspond to a stator portion fixed to the frame 1, and the main body 2a of the drive portion 2, the spindle 3, and the spindle shaft 4 correspond to a rotor portion rotating with respect to the stator portion.

[0005] The frame 1 is formed with an opening 1a having a shape into which the flange 5 is fitted. Therefore, the spindle motor 10 is positioned with respect to the frame 1 by fitting the flange portion 5 into the opening portion 1a as shown by an arrow A in the figure, and is fixed to the frame 1 with mounting screws (not shown) in this state. Is done.

[0006]

In the conventional method for mounting the spindle motor 10, the flange 5 of the spindle motor 10 is fitted into the opening 1a of the frame 1 so that the spindle which is the center of rotation of the magnetic disk is rotated. The positioning of the shaft 4 with respect to the frame 1 is performed.

The spindle shaft 4 and the flange 5
Between the spindle shaft 4 and the flange portion 5, there is an interposition such as a bearing, a member for joining the bearing and the flange portion 5, and so on. It is easily affected by processing accuracy.

Therefore, even if the mounting position accuracy of the flange portion 5 with respect to the frame 1 is increased, there is a problem that the mounting position accuracy of the spindle shaft 4 with respect to the frame 1 cannot be increased so much due to the accuracy error caused by the above-mentioned inclusions. Was.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to provide a motor mounting method capable of improving the mounting position accuracy of a rotary shaft of a spindle motor with respect to a frame.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a spindle motor having a rotating shaft, a front surface of which is provided with an engaging portion for engaging a disk, A spindle motor having a space for accommodating the disk and having a plurality of reference portions provided on a rear side thereof as a reference for determining a target position for arranging the rotation axis of the spindle motor; An attachment method, wherein a shaft engaging portion that engages with the rotating shaft of the spindle motor and a plurality of reference engaging portions that respectively engage with a plurality of reference portions of the frame are connected to the positioning member in the frame. Using a position setting jig integrally provided corresponding to the positional relationship between the joint target arrangement position and the plurality of reference portions, the spindle motor is mounted on the rear side of the frame by the frame. Approaching the position setting jig from the rear side of the arm to engage the positioning engagement portion with the positioning portion of the spindle motor, and the plurality of reference engagement portions to the plurality of reference portions, respectively. The position setting jig is mounted on the back side of the frame so as to engage with the frame, the rotation axis of the spindle motor is positioned at the arrangement target in the frame, and in this state, the spindle motor is moved to the frame. It was decided to screw it from the back side.

[0011]

According to the above construction, the rotating shaft of the spindle motor mounted on the frame is positioned at the target position for disposing the frame by the positional relationship between the shaft engaging portion of the position setting jig and the plurality of reference engaging portions. Since it is arranged, the position accuracy of the rotating shaft of the spindle motor is determined by the position setting jig, and is not affected by other parts constituting the spindle motor.

Further, since the position setting jig is configured to be engaged from the rear side of the frame and the spindle motor,
The risk of accidentally damaging the spindle shaft during the process of attaching the spindle motor to the frame is eliminated.

Further, since the spindle motor is screwed from the back side of the frame, the step of attaching the spindle motor to the frame is completely unaffected by the step of attaching other parts.

[0014]

1 shows an embodiment of a method for mounting a spindle motor according to the present invention. In the figure, reference numeral 20 denotes a frame on which a spindle motor is mounted, reference numeral 30 denotes a spindle motor for rotating a magnetic disk, and reference numeral 40 denotes a position setting jig for setting the position of the spindle motor 30 with respect to the frame 20. Parts indicated by other reference numerals are those in FIG.
5 to FIG.
This will be described with reference to FIGS.

The plan view of FIG. 2 shows the frame of FIG. 1, and the same components as those of FIG. 1 are denoted by the same reference numerals. In the figure, a frame 20 is formed by machining a screw integral portion or a portion requiring high precision from a cast integral molded product such as an aluminum die cast.

The frame 20 has a bottom surface 21 and both side surfaces 2.
2 and 23, and a rear surface portion 24. The side surface portion is not provided only on the insertion side of the magnetic disk (not shown) (the insertion direction of the magnetic disk is indicated by an arrow C).

A circular drive opening 2 for exposing the drive 31 of the spindle motor 30 is formed in the bottom 21.
1a and reference engagement pins 41 and 4 of the position setting jig 40.
Reference holes 21b and 21c, which are reference portions into which 2 (described later) are inserted and removed, are formed at predetermined positions.
Portions requiring high accuracy in the frame 20, including the drive unit opening 21a, are all reference holes 21b and 2d.
It is processed and formed with 1c as a reference position.

The spindle motor 30 to be mounted is
In order to expose various electronic components mounted on the control board 34 (described later), a large number of component openings 21d are formed, and the drive unit opening 21a is located on the side of the disk insertion direction, that is, on the C direction side in the drawing. Is a carriage setting section 21e for setting a head carriage (not shown) for supporting the magnetic head and positioning it on the recording track of the magnetic disk.
Are drilled.

Further, screw holes for screwing the control board 34 to the bottom portion 21 are provided at a total of five places, three places around the drive section opening 21a and two places near the component openings 21d located at the corners. A machined screw hole 21f is formed.

Then, the rotation shaft of the spindle motor 30 is positioned at an arrangement target position 33A in the figure by a position setting jig described later.

The inserted magnetic disk is mounted on both sides 22 and 23 of the drive unit 3 of the spindle motor 30.
A disk cartridge mounting mechanism (not shown) for mounting the disk cartridge on the upper spindle 32 is provided. A groove or a screw hole for mounting a stepping motor (not shown) for driving the head carriage and the like is formed on the rear surface 24 as necessary.

FIG. 3 is a plan view showing the spindle motor shown in FIG. In the figure, a spindle motor 30 includes a drive unit 31 that rotates in close contact with a magnetic disk, on a control board 30a on which conductive wiring is printed on an insulating layer uniformly laminated on the surface of a thin iron plate. It is configured by disposing various electronic components 35 for controlling the rotation of the drive unit 31 and the like.

The control board 30a includes a frame 20.
The insertion holes 3 through which mounting screws (not shown) are inserted corresponding to the five screw holes 21f formed in the bottom surface portion 21 of the above.
6 are drilled in five places. This insertion hole 36 has no thread groove and has a diameter slightly larger than the diameter of the mounting screw. Further, a notch 30b is formed so that the control board 30a does not interfere with the reference engagement pin 41 when the spindle motor 30 is mounted on the frame 20.

FIG. 4 shows the structure of the spindle motor in FIG. 3. FIG. 4A is an enlarged plan view of the spindle 32 in the drive unit 31, and FIG. 4B is a sectional view taken along line S1-S1 in FIG. Are respectively shown. However, FIG. 4B shows a state in which the spindle motor 30 is attached to the frame 20.

4 (A) and 4 (B), the stator portion of the drive portion 31 is constituted by a bearing 31a and a coil 31b disposed on a control board 30a, and the rotor portion is supported by the bearing 31a. It comprises a supported spindle shaft 33, a rotor case 31c fixed to the spindle shaft 33, and a magnet 31d adhered to the rotor case 31c so as to face the coil 31b.

In FIG. 4B, an opening is formed at the center of the spindle shaft 33 along the axial direction on the side opposite to the side of the control board 30a facing the magnetic disk (hereinafter referred to as the "back side"). The engagement hole 33a is formed as described above, and as described later, the position setting jig 40 is used when the spindle motor 30 is attached to the frame 20.
The shaft engaging pin 43 (see FIG. 5) is inserted (see FIG. 5).

On the upper surface of the spindle 32, a magnet 31e for fixing an iron hub (not shown) provided near the rotation center of the magnetic disk by magnetic attraction,
A drive pin 37 is provided which is engaged with a positioning hole provided at a position slightly distant from the rotation center of the hub and transmits the rotation of the drive unit 31 to the hub.

FIG. 5 is a perspective view showing the position setting jig in FIG. In the figure, 41 and 42 are reference engagement pins as reference engagement portions, 43 is a shaft engagement pin as a shaft engagement portion, and 44 is a reference engagement pin 41 and 42 and the shaft engagement pin 43 are predetermined. It is a jig base integrated so as to have a positional relationship of.

The position setting jig 40 is formed by processing a metal.
1, 42 and 43 are mounted so as to be exactly vertical. Each of the engagement pins 41, 42, and 43 has an outer diameter dimension to be engaged with the corresponding hole 21a, 21b, 21c without a gap, has a strength not to bend by the engagement, and is easily inserted. As described above, the tip portion is substantially sharp.

Jig base 4 for reference engagement pins 41 and 42
The arrangement position in 4 is a position corresponding to the arrangement position of the reference holes 21b and 21c in the frame 20 shown in FIG.

In FIG. 2, the position of the shaft engaging pin 43 on the jig base 44 corresponds to the target position 33 A of the spindle 33 on the frame 20 and the reference hole 2.
The positions have the same positional relationship as the positional relationship with 1b and 21c.

Next, a method of positioning and attaching the spindle motor 30 to the frame 20 will be described with reference to FIG.

First, the spindle motor 30 is approached from the side opposite to the side shown in FIG. 2 of the frame 20 (hereinafter referred to as “back side”), and the drive unit 31 of the spindle motor 30 drives the frame 20. The spindle motor 3 is mounted on the back side of the frame 20 so that the spindle motor 3 is inserted into the opening 21a.
Put 0.

Second, the position setting jig 40 is mounted on the frame with the side where the reference engaging pins 41 and 42 and the shaft engaging pin 43 of the position setting jig 40 protrude face the rear side of the frame 20. 20, the reference engagement pin 41 is inserted into the reference hole 21 b of the frame 20, the reference engagement pin 42 is inserted into the reference hole 21 c of the frame 20, and the shaft engagement pin 43.
Are fitted into the engaged holes 33a of the spindle motor 30, respectively, and the position setting jig 40 is attached in close contact with the rear side of the frame 20.

Thus, the spindle shaft 33 of the spindle motor 30 is positioned corresponding to the positional relationship between the reference engagement pins 41, 42 and the shaft engagement pin 43 in the position setting jig 40, and is disposed on the frame 20. It is accurately positioned with respect to the target position 33A (see FIG. 2). 6 shows a state in which the position setting jig 40 is fitted to the frame 20 and the spindle motor 30 as described above.

Third, while maintaining the above-mentioned fitting state,
Attach the mounting screw 51 to the control board 30 of the spindle motor 30.
The screw is screwed into the screw hole 21f provided in the frame 20 through the insertion hole 36 provided in the frame a. As described above, since the inner diameter of the insertion hole 36 is configured to be slightly larger than the outer diameter of the mounting screw 51, the spindle motor 30 is fixed to the frame 20 while maintaining the state accurately positioned by the position setting jig 40. Is done.

Finally, the step of attaching the spindle motor 30 to the frame 20 is completed by removing the position setting jig 40 from the rear side of the frame 20 on which the spindle motor 30 is accurately positioned and fixed. FIG.
2 shows a rear side of the frame 20 to which the spindle motor 30 is attached.

As described above, the accuracy of the mounting position of the spindle shaft 33 of the spindle motor 30 with respect to the frame 20 is determined by the reference engagement pins 41 and 42 of the position setting jig 40.
And the accuracy of the positional relationship between the shaft engaging pins 43, that is, only the processing accuracy of the position setting jig 40, so that errors due to inclusions do not accumulate as in the related art, and the mounting position accuracy can be improved. it can.

Further, since the position setting jig 40 is engaged from the rear side of the frame 20 and the spindle motor 30, there is a danger that the spindle shaft 33 may be erroneously damaged during the process of attaching the spindle motor 30 to the frame 20. Therefore, the quality of the manufactured magnetic disk drive can be improved.

Further, the spindle motor 30 is screwed from the back side of the frame 20 to provide a structure.
Since the attachment process of the spindle motor 30 to the frame 20 is completely unaffected by the attachment process of other parts, the timing for performing the attachment process of the spindle motor 30 can be arbitrarily determined.
Alternatively, replacement and position adjustment of the motor mechanism in the operating disk device can be performed.

In addition, in this embodiment, since the reference engagement pin 41 has a semi-cylindrical shape and the reference engagement pin 42 has a cylindrical shape, the reference holes 21b and 21c to be engaged during the mounting operation are erroneously inserted. There is no difference, and the working efficiency can be improved.

In the above-described embodiment, the holes 21b, 21c and 33a are formed in the reference portion provided in the frame 20 and the spindle shaft 33 provided in the spindle motor 30, and the reference engagement portion provided in the position setting jig 40. Although the pins (protrusions) 41, 42, and 43 are formed on the shaft engaging portion, other configurations may be employed as long as the reference portion and the reference engaging portion and the spindle shaft and the shaft engaging portion are fitted. Locking means.

[0043]

As described above, according to the present invention, the position accuracy of the rotary shaft of the spindle motor is determined by the position setting jig, and is not affected by other components constituting the spindle motor. There is a feature that the position accuracy of the rotating shaft can be improved as compared with the conventional case where the position is set via a portion that performs the rotation.

Further, since there is no danger of accidentally damaging the spindle shaft during the step of attaching the spindle motor to the frame, the quality of the magnetic disk drive manufactured can be improved.

Further, the process of attaching the spindle motor to the frame is completely unaffected by the process of attaching other parts, so that the timing of performing the process of attaching the spindle motor can be arbitrarily determined and the spindle motor can be completed or already completed. It is also possible to perform replacement and position adjustment of the motor mechanism in the operating magnetic disk device.

[Brief description of the drawings]

FIG. 1 is an exploded configuration view showing an embodiment of a spindle motor mounting method according to the present invention.

FIG. 2 is a plan view showing a frame in FIG. 1;

FIG. 3 is a plan view showing a spindle motor in FIG. 1;

FIG. 4 is a view showing a structure of a spindle motor in FIG. 3;

FIG. 5 is a perspective view showing a position setting jig in FIG. 1;

FIG. 6 is a configuration diagram showing a state in which a position setting jig is fitted to a frame and a spindle motor.

FIG. 7 is a plan view showing the rear side of the frame to which the spindle motor is attached.

FIG. 8 is a view showing an example of a conventional spindle motor mounting method.

[Explanation of symbols]

 Reference Signs List 20 Frame 21 Bottom part 21a Drive opening 21b, 21c Reference hole 21f Screw hole 30 Spindle motor 30a Control board 31 Drive 31c Rotor case 33 Spindle shaft 33a Engagement hole 36 Insertion hole 40 Position setting jig 41, 42 Reference engagement pin 43 Shaft engagement pin 44 Jig base

Claims (1)

(57) [Claims] 1. A disk having a rotating shaft and a disk
A spindle motor provided with an engaging portion for engaging the disk has a space on the front side for accommodating the disk, and a rear side.
The target position of the rotation axis of the spindle motor is determined.
Frame with multiple reference parts
How to attach a spindle motor that is fixed and fastened
A law, and the shaft engaging portion engaged with the rotary shaft of the spindle motor, a plurality of the reference engaging portions respectively engaging the plurality of reference portions of the frame, the positioning engaging in said frame Using a position setting jig integrally having a position corresponding to the positional relationship between the arrangement target portion and the plurality of reference portions, wherein the spindle motor is provided on the rear side of the frame, A position setting jig is brought close to the position so that the positioning engagement portion is engaged with the positioning portion of the spindle motor, and the plurality of reference engagement portions are respectively engaged with the plurality of reference portions. The position setting jig is mounted on the back side of the frame, and the rotation axis of the spindle motor is positioned at the arrangement target in the frame. Mounting method for a spindle motor, characterized in that screwed from the back side of the frame over data.