JPS60170069A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To eliminate the tilt of a spindle owing to the vibrations, heat and impacts and to avoid an off-track phenomenon, by forming a through hole to a housing base through a bearing housing and setting a spring to said through hole. CONSTITUTION:A motor and a magnetic head disk assembly 3 are set on a base plate 1. The assembly 3 contains housing bases 4 and 5, a spindle 6, a carriage 7, a magnetic circuit 8, a baring housing 10 and a magnetic disk group 16. A through hole 18 is formed to the base 4 for linkage to the housing 10. The radial load is applied to a bearing 13 from a spring 20 put into a through hole 19 via the housing 10. This prevents the tilt of the spindle 6 owing to the vibrations, heat or external impacts which are produced during revolutions of the spindle 6. Therefore an off-track phenomenon can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a magnetic disk device, and particularly to the construction of a spindle of a magnetic disk device.

(Prior art) Conventionally, in this Hinoki magnetic disk drive, the outer periphery of the bearing housing fixed to the spindle shaft via the bearing and the fitting hole of the housing base were fitted with a gap.
,! 7) The spindle axis is tilted due to vibrations, heat, or shocks from the outside due to spindle rotation, and the fW report data on the magnetic disk group is changed to data gf, and the relative positional relationship with the magnetic head group is changed from place to place. However, there was a drawback that an off-track phenomenon occurred, making it impossible to read data.

(Objective of the Invention) It is an object of the present invention to overcome such drawbacks in conventional magnetic disk drives, eliminate the inclination of the spindle axis due to vibration, heat, and impact, and prevent off-track phenomena. Our goal is to provide disk devices.

(Components of the Invention) According to the present invention, two housing bases each holding two bearings disposed at both shaft ends of a spindle that supports and rotates a group of Mi air disks, and ten thousand outer rings of said bearings are provided. and a bearing housing that holds the 10,000 fitting holes of the housing base, an fc through hole provided in the housing base so as to communicate with the bearing housing, and a hole provided in the hole for the bearing. A magnetic disk device including a spring and a t which apply a radial load is advantageous.

(Example) Next, Example V of the present invention will be described with reference to the drawings.

FIG. 1 shows a front view of a magnetic disk drive according to an embodiment of the present invention, and FIG. 2 shows a partial sectional view of this embodiment. 11 and 2, in this embodiment, a motor 2 and a magnetic head/disk assembly 3 are mounted on a base plate 1-1. This magnetic head disk assembly 3 has a housing base 4. housing base 5
．． Spindle 6, carriage 7, magnetic circuit 8, cover 9.
It consists of a bearing housing 10 and a magnetic disk group 16.

The spindle 6 is Kuyafu)11. Spindle Hough '12
．． Bearings 13 and 14. A magnetic disk group 16 is fixed to the spindle hub 12 by a clamp ring 18 via a spacer ring 17'.

Further, a through hole 19 is provided in the center of the housing base 4, which fixes and holds the outer ring of the shaft support 13, and which communicates with the outer periphery of the bearing housing IO that contacts the fitting hole of the housing base 4. A spring 20 is mounted in the through hole 19, and the bearing housing 10 is configured to apply a radial force to the bearing 13 as a gold valve.

A magnetic head #21 is mounted on the carriage 7, and the magnetic field of the magnetic circuit 8 and the coil 22 attached to the carriage 7
Due to the repulsion between the magnetic field and the magnetic field generated by applying the magnetic field 11i to Performs linear reciprocating motion.

The magnetic disk group 16, which is attached to the spindle hub 12, rotates the motor 2 disposed on the base plate 1 by the motor pulley 23. The belt 24 is rotated nine times by being transmitted to the spindle 6 via the spindle pulley 15t.

Thus, in an uninvented embodiment, the housing base 4
A through hole 19 communicating with the intermediate bearing housing 1o is provided in the through hole 1o, and a spring 20 inserted into the through hole 19 applies a radial load i to the bearing 13 via the bearing housing lQ, so that the spindle 6 rotates. The effect is that the spindle 6 does not have at<C due to vibration, heat, or impact QC of the external force 1, so that no off-track phenomenon occurs.

2. In Kio's example, the spring 2o that gives the radial load to the hatchet 13 is placed at one location, but even if several springs 20 are arranged 1, the same effect as the upper 6 spring effect can be obtained.

(Infant of the invention) As explained above, the invention has a simple structure in which the housing base 4 is provided with a through hole 19 which is connected to the bearing housing LO, and the spring 20Q is fitted into the through hole 19. Eliminate +m+al of spindle 6 and create a young fruit that can stop the off-track phenomenon by 1 soj.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a plan view showing a local town [aIt] showing this embodiment. l...base plate, 2...motor, 3...magnetic head disk assembly, 4,5...
...Housing base, 6...Spindle, 7...Ear ridge.

Claims (1)

[Claims] Two housing bases each holding two bearings placed at both ends of a spindle that supports and rotates a group of magnetic disks, and holding an outer ring τ of 8 front bearings, and
A bearing housing in contact with the 10,000 fitting holes of the housing base is provided in the housing space with a through hole provided so as to communicate with the bearing housing, and a through hole provided in the through hole to apply a radial load to the bearing. A Mi disk device comprising a spring.