JPH0591714A - Method for adjusting void length of linear motor - Google Patents

Abstract

PURPOSE:To easily obtain a void length which is needed by a linear motor, by providing a rolling part diameter of a rolling member stepwise. CONSTITUTION:A recessed groove is provided at the left and right of a stator 4, a rolling receiving member 3-1 is provided at this groove, and a rolling member 5 which is retained by a rolling retention member 2 is mounted on it, thus enabling the movable element 1 to be slid. For obtaining a needed void length 6 between the movable element 1 and the stator 4, a rolling part diameter which becomes a basis of the rolling member 5 is provided stepwise and confirmation of the void length 6 which is needed in combination selectively is performed by a shim (thin plate). If no needed void length 6 can be obtained, rearrangement is performed. In this case, the rolling part diameter of the rolling member 5 is classified in stages according to a color or a mark of the rolling- retention member 3-1 and the rolling member 5 with a proper color matching is selected, thus obtaining the needed void length 6. The stator 1 is formed by mold forming and scattering according to a mold is measured previously for a plurality of molds, thus obtaining the needed void length 6 according to combination of the rolling member 5 which matches the mold.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear motor, and more particularly to a method for adjusting the air gap length of a linear motor.

[0002]

2. Description of the Related Art Conventionally, in order to obtain the air gap length of this type of linear motor, as shown in FIG. 3, an air gap adjusting plate 7 is laid under the rolling bearing member 3-1 to obtain a required air gap length. Alternatively, as shown in FIG. 4, the rolling receiving member 3-2 is attached to the stator 14
The height was adjusted by the void adjusting screw 8 provided in the above to obtain the required void length.

[0003]

In the above-mentioned conventional linear motor, there is a method for adjusting the gap length by providing a gap adjusting plate having a stepwise thickness under the rolling receiving member to obtain a required gap length. However, since the gap adjusting plate is thin, the height changes due to deformation, the parallelism of the mover changes, and the characteristics deteriorate, and it takes time to correct this. Further, as another adjusting method, a method of obtaining a required void length with a void adjusting screw has a drawback that the height is changed due to loosening of the screw to deteriorate the characteristics and it takes time to correct.

[0004]

According to the method for adjusting the gap length of a linear motor of the present invention, a rolling receiving member for supporting a rolling member for supporting and movably supporting a movable element is provided on a stator, and In a linear motor that does not have a gap adjusting function with the stator, it is necessary to gradually provide the rolling portion diameter of the rolling member provided corresponding to the predicted adjustment range and selectively use the rolling member. It is characterized by obtaining a wide void length.

[0005]

The present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. FIG. 1A is a perspective view, FIG. 1B is a sectional view, FIG. 1C is a plan view without a mover, and FIG. It is a chart figure which shows the void correction flow of a present Example.

In this embodiment, recessed grooves for rolling receiving members are provided on the left and right sides of the stator 4, and the rolling receiving members 3-1 are provided in the grooves.
Is a linear motor in which the rolling element 5 held by the rolling holding member 2 is placed thereon, and the mover 1 is slidable. Gap length 6 required between mover 1 and stator 4
In order to obtain the above, the diameter of the rolling portion, which is the basis of the rolling member 5, is provided in stages, and the necessary gap length is confirmed by a shim (thin plate) by selectively combining them. If the required gap length cannot be obtained, the rearrangement is performed based on the gap correction flow of FIG. At this time, the rolling portion diameter of the rolling member 5 is divided in stages according to the color or mark and shape of the rolling holding member 3-1, and an appropriate rolling member 5 of a combination is selected, and it is easily required. Can be obtained. Further, the stator 1 is formed by molding, and in the case of plural moldings, the variation due to the mold is measured in advance,
The required gap length can be easily obtained by combining the rolling members 5 suitable for the mold.

[0008]

As described above, according to the present invention, by providing the rolling portion diameter of the rolling member in stages, the gap length required by the linear motor can be easily obtained, and any change or modification can be performed. Even if it does not deteriorate the parallelism of the mover, it has the effect that the required gap length can be obtained stably, and even when the stator is formed by molding, variations due to the mold are also measured during the initial measurement. It has an effect that it can be absorbed by setting the diameter stepwise.

[Brief description of drawings]

1A and 1B show an embodiment of the present invention, FIG. 1A is a perspective view, FIG. 1B is a sectional view, and FIG. 1C is a plan view without a mover.

FIG. 2 is a chart showing a flow for correcting voids according to the present embodiment.

FIG. 3 is a cross-sectional view showing an example of a conventional void adjusting method.

FIG. 4 is a cross-sectional view showing another example of a conventional gap adjusting method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mover 2 Rolling holding member 3-1, 3-2 Rolling receiving member 4,14 Stator 5 Rolling member 6 Gap length 7 Gap adjusting plate 8 Gap adjusting screw

Claims (2)

[Claims] 1. A linear motor having a rolling receiving member for supporting a movable member and a rolling member for movably supporting the movable member, wherein the rolling member is not provided with a gap adjusting function between the movable member and the stator. Gap length adjustment of a linear motor, characterized in that the rolling member diameter of the rolling member provided corresponding to the predicted range is provided in stages, and the required gap length is obtained by selectively using the rolling member. Method. 2. The air gap of the linear motor according to claim 1, wherein the rolling member diameter of the rolling member is divided stepwise by the color or marking and shape of the rolling holding member. How to adjust the length.