JPS62141958A - Vibration preventing mechanism for linear pulse motor - Google Patents

Abstract

PURPOSE:To accelerate settling at positioning time of a linear pulse motor by contacting under pressure a frictional member through an elastic member provided at a movable element with a stator to rapidly attenuate an unnecessary vibration to suppress a resonance when the motor is driven. CONSTITUTION:A guide roller 5 fixed to a movable element 1 is contacted with the side of a stator 2 to support one end of the stator 2. A frictional member 8 is contacted under pressure through an elastic member 7 provided at the element 1 to support the other end of the stator 2 to the other side of the stator 2 opposed to the contacting position of the roller 5. The stator 2 and the element 1 are braked therebetween by the pressure contact of the member 8.

Description

[Detailed Description of the Invention] [Summary] This is a vibration isolation mechanism for a linear pulse motor, which is configured to apply frictional braking in order to suppress resonance during motor drive and speed up settling during positioning, thereby eliminating unnecessary vibrations. This makes it possible to quickly attenuate the

[Industrial application field]

The present invention relates to a linear pulse motor, and more particularly to a vibration isolation mechanism for a linear pulse motor that is improved so as to quickly damp vibrations of a mover and a stator.

Linear pulse motors are increasingly being used, for example, for transporting carriages in printers and for accessing heads in floppy disk drives.

In order to improve the performance of printers and floppy disk drives, there is a need for higher-speed positioning capabilities for carriages and heads than ever before. In order to perform high-speed positioning, it is necessary to quickly damp the vibrations of the mover and stator of the linear pulse motor that drives the carriage and head, and an inexpensive and reliable method for this purpose is needed.

[Conventional technology]

3 and 4 show a sectional view and a back view of a guide mechanism of a conventional linear pulse motor.

Third. In FIG. 4, 1 is a movable element, 2 is a stator, 3 is a stator tooth, 4 is a transfer member for maintaining a minute gap between the stator 2 and the movable element 1, 5 is a guide roller, and 6 is a guide roller. 7 is a spring member.

As shown in the figure, the guide mechanism of the conventional linear pulse motor supports both sides of the stator 2 by a guide roller 5 directly attached to the movable element 1 on one side, and supports a spring member 7 on the other side. The movable part 1 is supported by guide rollers 6 attached to the movable part 1 through the movable part 1, and the transfer member 4 provided in the movable part 1 comes into contact with both sides of the stator 2, so that the fixed part 2 and the movable part 1 are
The structure maintains a predetermined distance between the two.

The stator 2 has a large number of stator teeth (slits) 3 made of magnetic material and formed in a direction perpendicular to the axial direction, and
The mover 1 is provided with a plurality of magnetic poles having mover teeth facing the slits 3 of the stator 2 and an excitation coil for exciting the magnetic poles (not shown).

The operation is such that a current corresponding to the direction of movement flows through the excitation coil of the mover 1, so that the magnetic poles of the mover 1 are excited, and the attractive force between the stator teeth 3 of the stator 1 and the magnetic poles causes the stator 1 to The mover 2 moves relatively.

[Problem that the invention seeks to solve]

As shown in FIGS. 3 and 4, the conventional linear pulse motor has a structure in which a movable element 1 and a stator 2 are supported by a rolling member 4 and guide rollers 5 and 6.

Therefore, in order to prevent resonance during motor drive and speed up settling during positioning, electrical braking must be performed.
Problems were caused by the complexity of the drive circuit and the stability of braking.

A method has also been proposed in which frictional braking is applied by supporting both side surfaces 2S+2s' of the stator 2 only by a sliding guide mechanism attached to the movable element 1. However, due to wear of the sliding guide mechanism, the sliding guide mechanism There have been problems such as rattling between the stators and displacement of the mover in a direction perpendicular to the side surface 2S of the stator.

The present invention was created in view of these points, and is a vibration-proofing method for linear pulse motors that quickly damps unnecessary vibrations during motor drive, suppresses resonance, and speeds up settling during positioning. The purpose is to provide a mechanism.

[Means for solving problems]

FIGS. 1 and 2 are a sectional view and a back view of a guide mechanism of a linear pulse motor of the present invention, and the linear pulse motor of the present invention includes
A rolling guide mechanism (5) is provided for regulating the movement of the mover in a direction perpendicular to the side surface, and a friction member (8) is provided on the mover that presses another side surface facing the side surface. The structure is such that it is provided via an elastic member (7).

[Effect]

A guide roller 5 fixed to the side surface of the stator 2 to the movable element 1
The other side of the stator 2 facing the contact position of the roller 5 is pressed against the friction member 8 via the elastic member 7 provided on the movable element 1. and supports the other end of the stator 1, and brakes the stator 2 by pressing the friction member 8.

Since the present invention applies braking using a friction member, there is no need for a special drive circuit for braking, and the stability is higher than that of electrical braking. It is possible to prevent backlash and displacement of the mover in a direction perpendicular to the side surface of the stator.

〔Example〕

1 and 2 show a sectional view and a back view of a guide mechanism of a linear pulse motor according to an embodiment of the present invention.

In the figure, ■ is a mover, 2 is a stator, 3 is a stator tooth,
4 is a rolling member for maintaining a minute gap between the stator 2 and the movable element 1; 5 is a guide roller; 7 is a spring member; and 8 is a friction member fixed to the spring member 7.

The friction member 8 is made of plastic or the like, and performs braking by friction with the stator 2 made of silicon steel, pure iron, or the like.

The braking operation is performed because one side of the stator 2 is supported by a rolling guide mechanism and the other side is supported by a spring member 7 attached to the movable element 1 via a friction member 8. Stable frictional braking can be obtained between the mover and the mover.

According to this embodiment, when the side surface 2S of the stator 2 supported by the guide roller 5 is used as the reference surface, the movable element 1 does not shift with respect to the stator 2 in the direction perpendicular to the reference surface 2S.

〔Effect of the invention〕

As explained above, according to the present invention, stable frictional braking is obtained between the stator and the mover, and even if the friction member wears out, the mover does not shift in the direction perpendicular to the side surface of the stator. do not have.

[Brief explanation of drawings]

1 and 2 are a sectional view and a back view of a guide mechanism of a linear pulse motor according to an embodiment of the present invention, and FIGS. 3 and 4 are a sectional view and a back view of a guide mechanism of a conventional linear pulse motor. It is. In the figure, 1 is a movable element, 2 is a stator, 2S and 2s' are side surfaces of the stator, 3 is a stator tooth, 4 is a transfer member, 5.6 is a guide roller, 7 is a spring member, and 8 is a friction member. It shows. 11 motion) 2) Each gFI/l -*kO'J ts Sunia ALZ stone-F Noah'4 t. 2nd
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Claims (1)

[Claims] Stator teeth made of magnetic material (
3), and a movable element (1) that moves in the movement direction with a required gap on the stator, a rolling guide mechanism is provided on the side surface of the stator. (5), and a structure in which a friction member (8) for press-contacting another side surface facing the side surface is provided via an elastic member (7) provided on the movable element. Anti-vibration mechanism for pulse motors.