JPH062982U - Disk drive motor - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a disk drive motor that can be disassembled without losing mechanical accuracy. [Structure] A base portion 1 is provided with a cylindrical portion 2 erected substantially orthogonally thereto, and a rotary shaft 3 is laid on the cylindrical portion 2 substantially along a central axis direction and rotatably supported via a bearing 4. In the disk drive motor having the substantially cup-shaped hub holder 5 for holding the disk that rotates integrally with the rotating shaft, the disk clamp hole 6 is provided in the hub holder 5 near the end surface of the cylindrical portion 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disk drive motor that can be used in, for example, a hard disk drive device.

[0002]

[Prior art]

 An example of a disk drive motor used in a conventional hard disk drive device or the like will be described with reference to the drawings. In FIG. 3, the base portion 21 has a cup-shaped outer peripheral wall, and a protrusion portion 22 protruding upward is formed in the central portion. A stator core 29 is fitted and fixed to the lower portion of the protrusion 22 and inside the outer peripheral wall. A plurality of salient poles is formed radially on the stator core 29, and a coil 30 is wound around each salient pole. An inner ring of the bearing 24 is fixed to the upper portion of the protrusion 22, and a hub 25 is fitted to the outer ring of the bearing 24 so as to be rotatable with respect to the protrusion 22. The lower portion of the hub 25 is formed in a cup shape and has an outer peripheral wall 25a, and a drive magnet 28 is attached inside the outer peripheral wall 25a.

The drive magnet 28 faces the salient poles of the stator core 29 attached to the lower portion of the protrusion 22 with a gap, and the drive magnet 28 is controlled by energizing the coil 30 wound around the stator core 29. Is urged, and the hub 25 containing the drive magnet 28 is rotationally driven.

[0004]

[Problems to be solved by the device]

 Disk drive motors used in hard disk drive devices and the like have extremely high mechanical precision, and are therefore extremely difficult to disassemble. In particular, it is difficult to remove the hub 25 without affecting the bearing 24 and the hub 25. If a disc drive motor is found to be defective and must be disassembled unavoidably, the bearing 24 inside the disc drive motor will still be affected by the force applied during removal, even if it is carefully disassembled. Parts such as the hub and the hub 25 are damaged or deformed, and mechanical precision such as dimensions is deteriorated. For this reason, if a defect is found in the finished disk drive motor, it is often discarded as is.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a disk drive motor that can be disassembled without losing mechanical accuracy.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention has a cylindrical portion that is erected substantially orthogonal to a base portion, and has a rotating shaft substantially aligned with the central axis direction in the cylindrical portion and is rotated by a bearing. In a disk drive motor that has a substantially cup-shaped hub for disk holding that is supported at the same time and rotates integrally with the rotating shaft, a disk clamp hole is provided on the hub near the end surface of the cylindrical portion. It was

[0007]

[Action]

 A disk drive motor is inserted by inserting a rod from the disc clamp hole provided in the hub base and the base side of the cylindrical part, and pushing the cylindrical part standing upright to the base part with the rod. Can be disassembled.

[0008]

【Example】

 An embodiment of a disk drive motor according to the present invention will be described below with reference to the drawings. In FIG. 1, a cylindrical portion 2 is integrally formed at the center of a base portion 1 of the disk drive motor, and a stator core 9 is fitted and fixed to the outer peripheral side of the cylindrical portion 2. . The stator core 9 has a plurality of salient poles radially, and a coil 10 is wound around each salient pole. The outer ring of the bearing 4 is fixed to the hole formed through from the upper end to the lower end of the cylindrical portion 2 by press fitting adhesion or insertion bonding, and the rotary shaft 3 is bonded to the inner ring of the bearing 4, and the rotary shaft 3 is the bearing. It is rotatably supported by 4.

The rotary shaft 3 is integrally formed with a cup-shaped hub base 5. On the upper surface of the hub base 5, a plurality of disc clamp holes 6 used for clamping the disc are formed. The disc clamp hole 6 is sealed from the cylindrical portion 2 side with a sealant 7 such as a polyester film or an iron plate, and has a structure that prevents dust and dirt from entering the inside of the motor. The edge of the cylindrical portion 2 is positioned below the disc clamp hole 6 with a gap.

The hub base 5 also serves as a rotor case of the disk drive motor, and a drive magnet 8 is attached to the inside of the outer peripheral wall of the hub base 5. Since the inner peripheral surface of the drive magnet 8 faces the salient poles of the stator core 9 with a gap, when the coil 10 wound around the stator core 9 is energized and controlled, the drive magnet 8 is energized to drive the drive magnet 8. The built-in hub base 5 is rotationally driven.

When disassembling the disk drive motor as in the above embodiment, as shown in FIG. 2, the disk drive motor is turned upside down, and one end of the push rod 11 is inserted into each disk clamp hole 6 to form a cylinder. The other end of the push rod 11 is erected on the pedestal 12 while being brought into contact with the edge of the shaped portion 2. Further, in FIG. 2, the push rod 11 ′ is inserted into the cylindrical portion 2 from the upper portion, that is, the base portion 1 side and brought into contact with the rotary shaft 3, and the push rod 11 ′ is pushed toward the pedestal 12 side. By pushing the push rod 11 ′, the push rod 11 ′ pushes the hub base 5 and the push rod 11 pushes the cylindrical portion 2 of the base portion 1 from opposite directions, so that the hub base 5 is driven by the disk. It can be removed from the motor. The outer ring of the bearing 4 is fixed by press-fitting and does not come off, but the inner ring is fixed to the rotating shaft 3 only by attachment, so the strength is not so high and it can be easily removed. Further, since the hub base 5 can be removed without applying an excessive force to the rotary shaft 3, the hub base 5 and other parts, the rotary shaft 3, the hub base 5 and other parts are adversely affected by deformation and damage. Nothing.

As in the above-mentioned embodiment, the push rod 11 is inserted into the penetrating disc clamp hole 6 and the push rod 11 ′ is inserted into the cylindrical portion 2 on the base portion 1 side to push the push rods 11 and 11 ′, respectively. By matching them, it is possible to disassemble while maintaining the mechanical accuracy of the parts without damaging the parts such as the rotating shaft 3, the hub base 5, and the bearings 4, so a defect etc. was found in the disk drive motor. Even in this case, it is possible to disassemble and replace only the defective part without discarding the expensive disk drive motor itself.

[0013]

[Effect of device]

 According to the present invention, since the disc clamp hole is formed through the hub base of the disc drive motor, the push rod is inserted into the disc clamp hole and the cylindrical portion on the base side, and the push rods press each other to drive the disc. It is possible to disassemble the parts that make up the motor without losing the mechanical accuracy.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a disk drive motor according to the present invention.

FIG. 2 is a sectional view showing an example of disassembling the drive motor of the same as above.

FIG. 3 is a sectional view showing an example of a conventional disk drive motor.

[Explanation of symbols]

 1 Base part 2 Cylindrical part 3 Rotating shaft 4 Bearing 5 Hub stand 6 Disc clamp hole

Claims (1)

[Scope of utility model registration request] 1. A base portion has a cylindrical portion which is erected substantially orthogonal to the base portion, and a rotation shaft is laid on the cylindrical portion substantially along a central axis direction so as to be rotatably supported by a bearing, and the rotation is performed. A disk drive motor having a substantially cup-shaped hub for disk holding which rotates integrally with a shaft, wherein a disk clamp hole is provided in the hub near the end face of the cylindrical portion. .