CN2453421Y

CN2453421Y - Vibration balancing device

Info

Publication number: CN2453421Y
Application number: CN 00263527
Authority: CN
Inventors: 郭立华
Original assignee: Lite On IT Corp
Current assignee: Lite On IT Corp
Priority date: 2000-12-05
Filing date: 2000-12-05
Publication date: 2001-10-10
Anticipated expiration: 2010-12-05

Abstract

The utility model relates to a vibration balancing device, which is composed of a rotary body, at least a track, and multiple rollers. The tracks take a rotary shaft of a rotary body as a center of a circle, and the tracks are arranged on the rotary body. The rollers is formed by multiple steel balls with different friction coefficient and multiple Teflons, or multiple ceramic rollers. The steel balls, the Teflons, or ceramic rollers are arranged on the tracks in the crossing form. The utility model can reduce the frictional force among the rollers for improving the sensitivity of unbalance to a system and reducing vibration and noise. The operating accuracy and service life can be improved.

Description

Vibrating balancer

The relevant a kind of vibrating balancer of the utility model refers to a kind of high speed rotating that is applicable to CD-ROM drive especially, and it utilizes Teflon or ceramic roller to place between two steel balls, to reduce the friction force between the roller.

In the application scenario of high multiple CD-ROM drive, owing under the influence of laying particular stress on the vibration that the heart and high speed rotating produce of disc, make it to cause data read-write equipment normally to operate, and cause the failure of reading and writing.Yet, as shown in Figures 1 and 2, in order to reduce the vibration that heart rotation is caused of laying particular stress on of disc 10a, disc 10a upper end or lower end in CD-ROM drive 1a are provided with a vibrating balancer 2a, this vibrating balancer 2a utilizes the roller of a plurality of steel ball 20a to use as balance, and these steel balls 20a is arranged in the track 22a of a rotary body 21a, this rotary body 21a can rotate with the driving of a motor 11a, after this rotary body 21a is higher than a certain critical rotary speed, these steel balls 20a can be rolled into the position of balance automatically along with the size of lopsidedness, and reduces vibration, the purpose of noise.

The general employed steel ball 20a of vibrating balancer 2a, it need have more than two at least, otherwise single steel ball 20a itself promptly is the source of laying particular stress on the heart, and under the very little situation of original system lopsidedness, can increase amount of unbalance on the contrary, and produce bigger vibration; Moreover traditional vibrating balancer 2a is for improving the sensitivity of steel ball 20a to system's amount of unbalance, mostly to reduce the friction force between this steel ball 20a and the track 22.But, since this steel ball 20a not only have only single, so, when the original system amount of unbalance is big, these steel balls 20a mostly concentrates on the same area and is in contact with one another, and under the influence of the mutual friction force of these steel balls 20a, also can cause the instable increase of vibration.So as from the foregoing, above-mentioned traditional vibrating balancer on reality is used, obviously has inconvenience and exists with defective, and can wait to be improved.

Fundamental purpose of the present utility model provides a kind of vibrating balancer, it utilizes Teflon or ceramic roller to put mutually with the staggered of steel ball, it has and separates two steel balls and make it to be indirect contact, to reduce the friction force between the roller, and the raising roller is to the sensitivity of system's amount of unbalance, and then reduce vibration and noise, to increase running precision and serviceable life.

The purpose of this utility model is achieved in that a kind of vibrating balancer, it is characterized in that: comprising: a rotary body; At least one track, all the turning axle with this rotary body is the center of circle, and these tracks are to be arranged on this rotary body; And a plurality of rollers, be that a plurality of first rollers and a plurality of second roller by different coefficients of friction constituted, these first rollers and these second prodigals are crisscross arranged in these tracks, and the mutual friction force of this first roller and this second roller is much smaller than the mutual friction force of two first rollers.

This rotary body is fixed on the spindle motor, and this rotary body can drive with spindle motor and rotate.

The material of this first roller is the steel material, and the material of this second roller is Teflon or pottery.

The utility model is a kind of vibrating balancer, include a rotary body, at least one track and a plurality of roller, these tracks are the center of circle with the turning axle of this rotary body all, and these tracks are arranged on this rotary body, these rollers are a plurality of first rollers and a plurality of second rollers of different coefficients of friction (also can be different sizes), these first rollers are steel balls of general usefulness, these second prodigals are Teflon or ceramic roller, these first rollers and these second rollers are to be crisscross arranged in these tracks, because the mutual friction force of this first roller and this second roller is much smaller than the mutual friction force of two first rollers, so, can improve the sensitivity of roller to system's amount of unbalance.

Describe feature of the present utility model and technology contents in detail below in conjunction with accompanying drawing:

Fig. 1 is the top plan view of traditional vibrating balancer.

Fig. 2 is the side cutaway view of traditional vibrating balancer.

Fig. 3 is the top plan view of the utility model vibrating balancer.

Fig. 4 is the side cutaway view of the utility model vibrating balancer.

Please consult Fig. 3 and shown in Figure 4 simultaneously, wherein, one CD ROM read-write device: include a spindle motor 10, be connected with a disc bearing dish 12 on the rotor 11 of this spindle motor 10, this disc bearing dish 12 can be in order to carry a disc 13, above this disc bearing dish 12, be provided with a disc press fit device 14 in addition, this disc press fit device 14 can be pressed on this disc 13, so that utilize this disc bearing dish 12 and this disc press fit device 14 that this disc 13 is clamped, drive via this spindle motor 10 again, and make this disc 13 rotations, in order to the CD ROM read-write device for reading data.

The utility model mainly provides a vibrating balancer 2, this vibrating balancer 2 is connected in rotor 11 and this disc bearing dish 12 of this spindle motor 1, this vibrating balancer 2 has a rotary body 20, this rotary body 20 is socketed on the rotor 11 of this spindle motor 1, it is the circuit orbit 22 in the center of circle that this rotary body 20 is provided with a turning axle 21 with this rotary body 20, this track 22 is a toroidal cavity shape, these tracks 22 are arranged on this rotary body 20, and this rotary body 20 also can be provided with the track 22 more than two or two, the number of this track 22 does not limit, and the cross sectional shape of this track 22 can be the plane, shape such as arc or V-type.In this track 22, be provided with a plurality of rollers 23 in addition, the shape of these rollers 23 can be circle symmetric shapes such as sphere, cylindrical, taper shape, these rollers 23 are a plurality of first rollers 230 and a plurality of second roller 231 of unlike material and friction factor (also can be different sizes), wherein the material of these first rollers 230 is the steel material, the material of this second roller 231 is Teflon or pottery, and these first prodigals 230 and these second prodigals 230 are crisscross arranged in this track 22.Wherein, this first roller 230 and this second prodigal's 231 friction force is much smaller than the friction force of two first rollers 230, so, can improve the sensitivity of 23 pairs of system's amount of unbalances of these rollers, and after this rotary body 20 was higher than a certain critical rotary speed, these rollers 23 can be along with the size of lopsidedness, and was rolled into the position of balance automatically, thereby reach minimizing vibration, noise, and improve the running accuracy and the purpose in serviceable life.

In sum, the utility model is to utilize the staggered of roller of differentiated friction power to put mutually, in order to the friction between the reduction roller, and improves the sensitivity of roller to system's amount of unbalance, thereby reach minimizing vibration, noise, and improve advantages such as running precision and serviceable life.

Claims

1, a kind of vibrating balancer is characterized in that: comprising: a rotary body; At least one track, all the turning axle with this rotary body is the center of circle, and these tracks are to be arranged on this rotary body; And a plurality of rollers, be that a plurality of first rollers and a plurality of second roller by different coefficients of friction constituted, these first rollers and these second prodigals are crisscross arranged in these tracks, and the mutual friction force of this first roller and this second roller is much smaller than the mutual friction force of two first rollers.

2, vibrating balancer as claimed in claim 1 is characterized in that: this rotary body is fixed on the spindle motor, and this rotary body can drive with spindle motor and rotate.

3, vibrating balancer as claimed in claim 1 is characterized in that: the material of this first roller is the steel material, and the material of this second roller is Teflon or pottery.