JP2647973B2 - Linear pulse motor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a linear pulse motor, and more particularly to a linear pulse motor used as a motor for driving a magnetic head of a magnetic recording apparatus.

[Conventional technology]

 FIG. 2 shows a conventional example.

In the conventional example shown in FIG. 2, a pair of primary cores 51 around which a drive winding 50 is wound, and a primary core
The magnets 52 disposed between each other, the primary core magnetic pole teeth 53 provided on the upper surface of each primary core 51, the primary core 51 and the magnet
And a base 54 on which 52 is mounted.
The lower rolling member guide groove member 55 described above is fixed by the fixing agent 56. On the other hand, as the mover 101, a pair of primary iron core magnetic pole teeth 5
3 and a pair of secondary core magnetic pole teeth 57 facing the lower rolling member 3 and an upper rolling member guide groove 58 provided facing the lower rolling member guide groove 55. A rolling member 59 is provided between the lower rolling member guide groove 55 of the stator 100 and the upper rolling member guide groove 58 of the mover 101.

[Problems to be solved by the invention]

However, in the above-described conventional example, since the dimensional allowance such as the gap amount and the parallelism with the secondary core magnetic pole teeth opposed to the primary core magnetic pole teeth is narrow, all parts related to these dimensions are used. Since it must be manufactured with high precision, there is a disadvantage that quality control is difficult in manufacturing. Further, since the member forming the lower rolling member guide groove and the member forming the stator are separate parts, the strength and dimensional accuracy when the lower rolling member guide groove is fixed vary. Inconvenience had occurred.

[Object of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a linear pulse motor capable of improving the inconvenience seen in such a conventional example, facilitating quality control, and improving productivity and reducing assembly costs by reducing the number of assembly steps. To provide.

[Means for solving the problem]

In the present invention, a pair of primary iron cores around which the drive winding is wound,
The magnets disposed between the primary cores, the primary core magnetic pole teeth provided on the upper surface of each primary core, the base on which the primary core and the magnet are mounted, and the base provided on a part of the base One or more lower rolling member guide grooves form a stator. On the other hand, the mover is constituted by the secondary iron core magnetic pole teeth facing the primary iron core magnetic pole teeth and the upper rolling member guide grooves arranged opposite to the lower rolling member guide grooves. A rolling member is provided between the lower rolling member guide groove of the stator and the upper rolling member guide groove of the mover. Further, the primary iron core of the stator, the magnet, and the lower rolling member guide groove are integrally formed on a base with a synthetic resin, and the lower rolling member guide groove is formed in a rectangular shape. The method employs a method of disposing two round bars as wear-resistant members inside. This aims to achieve the above-mentioned object.

[Action]

Each time the excitation condition changes due to a pulse signal input to the drive winding, the mover linearly moves on the stator at exactly a fixed pitch. The rolling member is provided with two round bars, which are wear-resistant members disposed in the rectangular lower rolling member guide groove, and a V-shaped upper rolling member guide groove, for example, so as not to fall off from the regular position. It is sandwiched between. When the mover moves, the vertical rolling member guide groove slides across the rolling member so as to accurately move linearly on the stator. The inner surface of the lower rolling member guide groove is provided with two round bars, which are abrasion-resistant materials, in order to withstand abrasion with the rolling member caused when the mover moves.

Here, a strong attractive force by a permanent magnet acts between the mover and the stator, and this attractive force is generated by the rolling member through the rolling member.
The two round bars are urged toward the lower rolling member guide groove side.
No special fastening means is required to attach the round bar.

(Example of the invention)

One embodiment of the present invention will be described with reference to FIG. Here, the same reference numerals are used for the same components as those in the conventional example described above.

In the embodiment shown in FIG.
A pair of primary iron cores 51 around which the drive windings 50 are wound, magnets 52 disposed between the primary iron cores 51, primary core magnetic pole teeth 53 provided on the upper surface of each primary iron core 51, It comprises a base 54 on which the iron core 51 and the magnet 52 are mounted, and one or more lower rolling member guide grooves 55A provided on a part of the base 54. On the other hand, the mover 101 is
And the lower rolling member guide groove 55A
And upper rolling member guide grooves 58 provided opposite to the upper rolling member. Further, the lower rolling member guide groove 55A of the stator 102
Rolling member 59 between the upper rolling member guide groove 58 and the movable element 101
Equipped. And the primary core 51 of the stator 102,
The magnet 52 and the lower rolling member guide groove 55A are
In addition to being integrally formed on the upper part 4, two round bars 1a and 1b as wear-resistant members are provided on the inner surface of the lower rolling member guide groove 55A.

Here, as the lower rolling member guide groove 55A, the primary iron core 51 is used.
A rectangular groove integral with the base 54 is provided on both sides of the base 54, and a pair of round bars 1a and 1b are disposed on the inner surface thereof as wear-resistant members. Further, a V-shaped notch is provided as an upper rolling member guide groove 58 on the lower surface of the mover 101 so as to face one lower rolling member guide groove 55A. And the vertical rolling member guide groove 55A
Between them, a round bar-shaped rolling member 59 is provided.

Here, the rolling member 59 is not limited to the present embodiment, and may be a general spherical member as compared with the related art.

 Next, the operation will be described.

The primary core magnetic pole teeth 53 of the stator 102 and the secondary core magnetic pole teeth 57 of the mover 101 face each other with a certain small gap. When the excitation conditions change due to the pulse signal input to the drive winding 50, the magnetic fields of the primary and secondary core magnetic pole teeth 53, 57 change, and the positions of the magnetic pole teeth attracting each other change.
Thus, the mover 101 linearly moves on the stator 102 at exactly a fixed pitch. At this time, the mover 101 is moved straight by the two rolling members 59 and the vertical rolling member guide grooves 55A and 58. The rolling member 59 is
Since it is not fixed to either upper or lower rolling member guide groove 55A, 58, the upper rolling member guide groove 58 formed by a V-shaped notch and the lower rolling It is sandwiched between two round bars 1a and 1b inside the member guide groove 55a. When the mover 101 moves, the upper and lower rolling member guide grooves 55A and 58 slide across the rolling member 59 so as to move accurately on the stator 102. Round rods 1a and 1b are provided on the inner surface of the lower rolling member guide groove 55A as wear-resistant materials in order to withstand abrasion with the rolling member 59 generated when the mover 101 moves.

Here, a strong attractive force by a permanent magnet acts between the mover and the stator, and this attractive force is generated by the rolling member through the rolling member.
The two round bars are urged toward the lower rolling member guide groove side.
No special fastening means is required to attach the round bar.

As described above, according to this embodiment, the primary core, the magnet, and the lower rolling member guide groove of the stator are integrally formed on the base with the synthetic resin, so that the primary core magnetic pole teeth and the secondary core are formed. Accuracy can be improved in setting the gap amount and the parallelism with the magnetic pole teeth. Further, since the rolling member guide groove is not fixed to the base, the number of assembling steps can be reduced, so that productivity can be improved and assembling cost can be reduced.

Further, since the lower rolling member guide groove is rectangular, and two round bars are provided as wear-resistant members inside the lower rolling member guide groove, the permanent magnet working between the mover and the stator can be used. Due to the strong suction force, the two round bars are urged toward the lower rolling member guide groove side through the rolling members, and no special fixing means is required for mounting the two round bars, which is Accordingly, it is possible to provide an unprecedented excellent linear pulse motor in which the manufacturing process of fixing the wear-resistant member to the lower rolling member guide groove can be reduced, and the manufacturing cost can be further reduced. it can.

Here, in each of the above embodiments, the rolling member 59 may have a generally spherical shape as compared with the related art.

〔The invention's effect〕

As described above, according to the present invention, the primary core of the stator, the magnet, and the lower rolling member guide groove are integrally formed on the base with a synthetic resin, and the inner surface of the lower rolling member guide groove is resistant. Equipped with wear members. As a result, it is possible to improve the accuracy in setting the gap amount and the parallelism between the primary core magnetic pole teeth and the secondary core magnetic pole teeth. Further, since the rolling member guide groove is not fixed to the base, the number of assembling steps can be reduced, so that productivity can be improved and assembling cost can be reduced.

Further, since the lower rolling member guide groove is rectangular, and two round bars are provided as wear-resistant members inside the lower rolling member guide groove, the permanent magnet working between the mover and the stator can be used. Due to the strong suction force, the two round bars are urged toward the lower rolling member guide groove side through the rolling members, and no special fixing means is required for mounting the two round bars, which is Accordingly, it is possible to provide an unprecedented excellent linear pulse motor in which the manufacturing process of fixing the wear-resistant member to the lower rolling member guide groove can be reduced, and the manufacturing cost can be further reduced. it can.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional example. 1a, 1b: wear-resistant member, 50: drive winding, 51: primary core, 52: magnet, 53: primary core magnetic pole teeth, 54: base,
55A: Lower rolling member guide groove, 57: Secondary core magnetic pole teeth, 58
... upper rolling member guide groove, 59 ... rolling member, 102 ... stator, 101 ... mover.

Claims (1)

(57) [Claims] 1. A pair of primary cores wound with a drive winding, a magnet disposed between the primary cores, a primary core pole tooth provided on an upper surface of each of the primary cores, and the primary core. And a stator having a base on which a magnet is mounted and one or more lower rolling member guide grooves provided in a part of the base; and a pair of secondary faces facing each of the primary iron core magnetic pole teeth. A mover having an iron core magnetic pole tooth and an upper rolling member guide groove provided opposite to the lower rolling member guide groove; and a lower rolling member guide groove of the stator and an upper rolling of the mover. A linear pulse motor having a rolling member provided between a member guide groove and a primary core of the stator, a magnet, and a lower rolling member guide groove integrally formed on a base with a synthetic resin. In addition, the lower rolling member guide groove is formed in a rectangular shape, and the inside of the lower rolling member guide groove has wear resistance. Linear pulse motor, characterized in that were provided with two round rods as wood.