CN201289738Y

CN201289738Y - Biaxial static pressure air suspension bearing of electric gramophone

Info

Publication number: CN201289738Y
Application number: CNU2008200599802U
Authority: CN
Inventors: 王涤涤
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-20
Filing date: 2008-06-20
Publication date: 2009-08-12
Anticipated expiration: 2018-06-20

Abstract

The utility model discloses a biaxial pressure-feed air suspension bearing of a phonograph. The pressure-feed air suspension bearing comprises a turntable of the phonograph, a turntable shaft, a turntable shaft sleeve, a compressed air orifice plug, a compressed air inlet and an air diaphragm, wherein, air with a certain pressure is input as a friction medium, that is, the air diaphragm, between the turntable shaft and the turntable shaft sleeve through an air pump, the air diaphragm is 5 microns thick in the radial direction and 10-20 microns thick in the axial direction, and the air diaphragm is arranged between the turntable shaft and the turntable shaft sleeve in order to form a friction-free vibration-free air suspension bearing structure. The utility model has the advantages of friction resistance, vibration resistance and long service life, and requires no lubrication.

Description

A kind of twin shaft of electric phonograph is to static pressure air suspension bearing

Technical field

The utility model belongs to the sound equipment field in the household electrical appliance, and especially a kind of twin shaft of electric phonograph in the sound system simulation audiogenic device that relates to is to static pressure air suspension bearing.

Background technology:

Electric phonograph is made up of rotating disk, tone arm, pickup, traditional disc record rotating mechanism all is that mechanical bearing constitutes, mechanical bearing in operation process owing to roll or the sliding friction meeting produces vibrations, vibrations cause the vibrations of disc by rotating disk, the disc vibrations will inevitably be sent into amplifier by pickup with music signal, cause the sound signal distortion, influence sound reproduction quality.

The bearing of present most electric phonograph rotating disks all is to adopt axle sleeve bearing (seeing figure-1), in order to reduce axle sleeve bearing friction power, the bottom of axle head is processed as taper shape, what also have is processed into sphere or is added with steel ball, in order to reduce friction, improve rigidity, the axle head of some high-grade axle sleeve bearings also use sapphire, ruby in addition with diamond as friction point, though certain effect has been received in this measure, contact friction can't fundamentally solve vibration problems; Though the basic structure of axle sleeve bearing be the axle with axle sleeve bottom surface of contact very little, because of the big friction of pressure still bigger; Radially contact area is bigger with axle sleeve for axle, and frictional resistance is also big; Vibrations are main from axial friction in the project organization of axle sleeve, in order to address this problem, air suspension technology has been adopted in the design of the high-grade electric phonograph of only a few, rotating disk is floated by air film, axle has not had with the axial rub of axle sleeve bottom, and the vibrations of rotating disk reduce many, and the structural design of this air suspension has solved axial rub, but radial friction still exists, (seeing figure-2).

The utility model content

The technical problems to be solved in the utility model is the defective that overcomes prior art, and the twin shaft that a kind of electric phonograph is provided is to static pressure air suspension bearing.

In order to overcome the shortcoming of above-mentioned technology, reduce the sound signal distortion, must overcome the fricative vibrations of rotating disk, traditional mechanical bearing has developed into a Limiting Level at present, the very difficulty of wanting to increase again; The utility model provides a kind of twin shaft of electric phonograph to static pressure air suspension bearing, comprise electric phonograph rotating disk, turntable shaft, rotating disk axle sleeve, pressure air orifice plug and pressure air air intake opening, it utilizes air to do friction media, friction factor is reduced to zero the level that approaches, the vibrations of rotating disk rotation also reduce thereupon significantly, because the rotating disk vibrations reduce, the signal to noise ratio (S/N ratio) that pickup picks up the disc sound signal improves, and distortion reduces; Described air bearing not only turntable shaft to floating with air, turntable shaft and rotating disk axle sleeve radially also at interval with air film, this twin shaft has fundamentally solved the problem of rotating disk friction vibrations to the structure of air suspension bearing.

The utility model designs between turntable shaft and rotating disk axle sleeve the pressure air air intake opening, and the air by air pump input certain pressure is as friction media, i.e. air diaphragms is controlled the pressure of air diaphragms by the pressure air orifice plug.

Described air diaphragms thickness radially is 5 microns, axially is the 10-20 micron;

Described turntable shaft and rotating disk axle sleeve axially and be provided with air diaphragms radially, do not have the shockproof air suspension bearing arrangement of friction thereby form.

Owing to adopt above-mentioned technical scheme, the utlity model has following beneficial effect:

1, fundamentally solved fricative vibration problem;

Improved the serviceable life of product when 2, having reduced distorted signals greatly;

3, air bearing utilizes air to do friction media, does not have contact friction, does not need grease lubrication,

In operation process, can not produce heat, therefore not wearing and tearing, long-term use need not be maintained.

Description of drawings

Fig. 1 is the sectional view of traditional electrical phonograph axle sleeve bearing;

Fig. 2 is that single shaft is to the air bearing sectional view;

Fig. 3 is the sectional view of the twin shaft of a kind of electric phonograph of the utility model to static pressure air suspension bearing.

In Fig. 3: 1. electric phonograph rotating disk, 2. turntable shaft, 3. rotating disk axle sleeve, 4. pressure air orifice plug, 5. pressure air air intake opening, 6. air diaphragms

Embodiment

Below in conjunction with embodiment the utility model is illustrated:

As shown in Figure 1, between the axle of rotating disk and axle sleeve axially and radially can produce the Mechanical Contact friction.

As shown in Figure 2, support (black arrow is depicted as pressure air and supports), removed the axial rub of axle, but axle is contact friction (white arrow is depicted as the Mechanical Contact friction) with axle sleeve still radially at the pressure air that axially utilizes of turntable shaft.

As shown in Figure 3, the utility model provides a kind of twin shaft of electric phonograph to static pressure air suspension bearing, comprise electric phonograph rotating disk 1, turntable shaft 2, rotating disk axle sleeve 3, pressure air orifice plug 4 and pressure air air intake opening 5, air diaphragms 6, it utilizes air to do friction media, friction factor is reduced to zero the level that approaches, and the vibrations of rotating disk rotation also reduce thereupon significantly, because the rotating disk vibrations reduce, the signal to noise ratio (S/N ratio) that pickup picks up the disc sound signal improves, and distortion reduces; Described air bearing not only at turntable shaft to floating with air, and turntable shaft 2 and rotating disk axle sleeve 3 radially also use air diaphragms 6 at interval, this twin shaft has fundamentally solved the problem of rotating disk friction vibrations to the structure of air suspension bearing.

The utility model designs between turntable shaft 2 and rotating disk axle sleeve 3 pressure air air intake opening 5, and the air by air pump input certain pressure is as friction media, and promptly air diaphragms 6, controlled the pressure of air diaphragms 6 by pressure air orifice plug 4.

The thickness of described air diaphragms 6 radially is 5 microns, axially is the 10-20 micron;

Described turntable shaft 2 and rotating disk axle sleeve 3 axially and be provided with air diaphragms 6 radially, do not have the shockproof air suspension bearing arrangement of friction thereby form.

It should be noted that at last: above embodiment only in order to the explanation the utility model and and the described technical scheme of unrestricted the utility model; Therefore, although this instructions has carried out comparatively detailed explanation with reference to the above embodiments to the utility model,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the utility model; And all do not break away from the technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in claim scope of the present utility model.

Claims

1, a kind of twin shaft of electric phonograph is to static pressure air suspension bearing, comprise electric phonograph rotating disk, turntable shaft, rotating disk axle sleeve, pressure air orifice plug, pressure air air intake opening and air diaphragms, it is characterized in that: described turntable shaft and rotating disk axle sleeve axially and be provided with air diaphragms radially.

2, the twin shaft of electric phonograph as claimed in claim 1 is characterized in that to static pressure air suspension bearing: described air diaphragms thickness radially is 5 microns, axially is the 10-20 micron.