Spindle motor and disk drive apparatus
a technology of disk drive and spindle motor, which is applied in the direction of sliding contact bearings, recording information storage, instruments, etc., can solve problems such as wear, and achieve the effect of suppressing or minimizing the evaporation of lubrican
Inactive Publication Date: 2015-02-05
NIDEC CORP
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The present invention provides a spindle motor with a stationary portion and a rotating portion. The spindle motor has a continuous supply of lubricant that prevents evaporation and allows for smooth operation. The design of the spindle motor reduces the likelihood of lubricant evaporation, resulting in improved efficiency and durability.
Problems solved by technology
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0018]In the following description, an upper side in a direction of a central axis of a motor is simply referred to as an “upper side,” and a lower side in the direction of the central axis of the motor is simply referred to as a “lower side.” An up-down direction does not mean a positional relationship or direction at a time of incorporation into actual equipment. In addition, a direction that is parallel with the central axis and a direction that is substantially parallel with the central axis are referred to as an “axial direction,” a radial direction about the central axis is simply referred to as a “radial direction,” and a circumferential direction about the central axis is simply referred to as a “circumferential direction.”
[0019]FIG. 1 is a schematic cross-sectional view of a disk drive apparatus 1 that includes a spindle motor (hereinafter, simply referred to as a “motor”) according to a preferred embodiment of the present invention. The disk drive apparatus 1 is a so-calle...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| width | aaaaa | aaaaa |
| contact area | aaaaa | aaaaa |
| cylindrical shape | aaaaa | aaaaa |
Login to View More
Abstract
A first capillary seal portion is positioned on a radially outer side of a bearing portion. A second capillary seal portion is positioned higher in an axial direction than the bearing portion and further on radially inner side than the first capillary seal portion. A seal cap covers a portion of an opening of the first capillary seal portion and a portion of an opening of the second capillary seal portion. The maximum width of a first gap between the outer circumferential surface of the shaft and an inner circumferential surface of the seal cap in a radial direction and the maximum width of a second gap between an upper surface of the sleeve portion and a lower surface of the seal cap in an axial direction is smaller than the maximum width of the opening of the first capillary seal portion.
Description
BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a spindle motor for a disk drive apparatus.[0003]2. Description of the Related Art[0004]In the related art, spindle motors for disk drive apparatuses that include bearing mechanisms which use fluid dynamic pressure are used. In such a bearing mechanism, a shaft is supported by a sleeve via a lubricant. The bearing mechanism achieves low noise in this manner. In the bearing mechanism disclosed in JP-A-2005-155912, a side surface of an inner circumferential surface of a hole portion of a cover member is chamfered and is allowed to face an outer circumferential surface of a shaft such that a first tapered seal portion, which is a tapered seal on an inner side, is formed and a second tapered seal portion, which is a tapered seal portion on an outer side, is formed between an outer circumferential side surface of the cover member and an inner circumferential surface of a housing. The bearing ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(United States)
IPC IPC(8): G11B19/20H02K7/08
CPCH02K7/085G11B19/2036F16C33/745F16C17/107F16C2370/12G11B19/2009H02K3/46H02K5/04H02K5/225
Inventor SHIRAISHI, MASAHIROWATANABE, TSUCHITSUGU
Owner NIDEC CORP