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Split Guide for Head-disk Assembly Vibration Isolation

IP.com Disclosure Number: IPCOM000061151D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Elliott, JF: AUTHOR [+3]

Abstract

Vibrations in the head-disk assembly are caused by pulsations in the spindle motor which are transmitted to the assembly through the spindle drive belt. The vibration is dampened by mounting the assembly to the drive frame with a guide having a resilient portion to absorb the peak energy of the vibrations.

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Split Guide for Head-disk Assembly Vibration Isolation

Vibrations in the head-disk assembly are caused by pulsations in the spindle motor which are transmitted to the assembly through the spindle drive belt. The vibration is dampened by mounting the assembly to the drive frame with a guide having a resilient portion to absorb the peak energy of the vibrations.

In Fig. 1, the head-disk assembly 10 has two mounting feet 12 and 14. Foot 12 rests on surface 15 of mounting bracket 16 on drive frame 18. Since the assembly is vertically positioned, the vertical load represented by the weight of the assembly and the tension in the spindle drive belt 20, which is load B, is taken up by surface 15.

Foot 14 is held in place by mounting bracket 22 on drive frame 18. Bracket 22 contains spring member 24, spacer 26 and split guide 28. Force from spring member 24 and force resulting from the tension in belt 20 make up load C which holds foot 14 against split guide 28.

In operation, motor 30 drives belt 20 which rotates spindle shaft 32. In Fig. 2, tension in belt 20 indicated by load D has a component, load A, which in part results in loads B and C (Fig. 1). When the motor is driving the belt, pulsations in the motor are transmitted to load A and therefore to loads B and C.

Split guide 28 has a portion 34 against which foot 14 rests. Portion 34 is spaced 0.5 mm from the surface of frame 18. Therefore, pulsations in load C may be absorbed and dampened by portion 34 of split guid...