JPS60229665A - Assembling method of linear pulse motor - Google Patents

Abstract

PURPOSE:To facilitate an assembling and to improve the performance of a linear pulse motor by integrally securing a magnetic circuit to a magnetic circuit holder in a state that placed through a spacer on a stator, and then removing the spacer. CONSTITUTION:A movable element is divided into a magnetic circuit 21 and a magnetic circuit holder 22, the circuit 21 is formed of a yoke having a toothed portion, and placed through a spacer 7 on the upper surface of the stator 1 having many teeth 1a. Then, the holder 22 is coated on the circuit 21, and integrally secured with a bond. Then, the spacer 7 interposed between the stator 1 and the movable element is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for assembling a linear pulse motor, particularly for easily forming a constant gap between a mover and a stator with high precision. (Prior art) In general, a linear bar/l' motor is a motor in which a pulse current is passed and a mover moves linearly by a fixed distance for each l bulk.Basically, as shown in Figure 1, a stator (1)
The teeth (2a) of the mover (2J) are arranged opposite to the teeth (1a) of the mover (21) by ff1(4)' for a fixed distance of about 10 to 100 μm, and each phase (A phase, A phase, By sequentially passing a pulse current through the excitation coil tv (3) wound around the B phase, C phase, C phase, and sequentially exciting the coil from the A phase,
The mechanism is such that the mover (2J) is linearly moved one step at a time in the direction indicated by the arrow.The broken line in the figure shows the magnetic flux generated when a pulse current is applied to the A-phase excitation coil. In order to manufacture a linear pulse motor with such a mechanism, the movable element (2) should move linearly while keeping the gap (4) between the stator (1) and the movable element (2) constant. For this reason, conventionally manufactured linear pulse motors generally have a plurality of shafts (5) protruding horizontally from both sides of the mover (2I), as shown in FIG. A vertical roll (6) rotatably mounted on the shaft (5).
), by supporting the mover (2+) on the stator (1), the tooth portion (2a) of the mover (2) and the tooth portion (la) of the stator (1) opposite thereto. The structure is such that the gap (4) is kept constant and the movable element (2) can move linearly.Therefore, in such a linear pulse motor, the movable element (2) is sequentially connected to the axis (2). 5) Since the vertical roll (6) is installed and assembled, in order to form the gap (4) with high precision so that the gap (4) can always be maintained at a predetermined value, the movable element (2), the shaft (5), and the vertical roll It is necessary to assemble the shapes and dimensions of each component with high precision, which naturally increases costs and causes the price of the linear pulse motor itself to soar, and it is also difficult to make the size of the linear pulse motor very small. Therefore, there were limits to the improvement of motor characteristics. (Purpose) The present invention was made to eliminate the above drawbacks, and
By dividing the mover into a magnetic circuit section and a magnetic circuit holding section, and sequentially assembling the above two sections on the stator via a spacer, it is possible to always maintain a slight and accurate gap between the two sections. The purpose of the present invention is to provide a method for manufacturing a linear pulse motor at low cost with good performance and without making the shape and dimensions of each component part more precise than necessary, with extremely easy on-site assembly, and with good performance. (Structure) The method for assembling a linear pulse motor according to the present invention is as follows.
A magnetic circuit holding section that is equipped with a magnetic circuit section consisting of a yoke with teeth for holding the movable element in the motor, and a mechanism that holds the magnetic circuit section facing the stator with a certain gap and runs on the stator. The magnetic circuit section is placed on the stator with a spacer corresponding to the gap size interposed therebetween, and in this state, the magnetic circuit section and the magnetic circuit holding section are assembled and fixed together. , the spacer is removed to form a movable element. (Example) A method for assembling a linear pulse motor according to the present invention will be described in detail based on the following example. FIG. 3 shows an example of the method for assembling the linear pulse motor according to the present invention in the order of (3), ([31 and C
). That is, as is clear from the same figure (G), the linear pulse motor according to the present invention replaces the movable element (2) (see Fig. 2) in the conventional same motor with the magnetic circuit part Q◇ and the magnetic circuit holding part holder. To divide. The magnetic circuit section 01) is formed by a yoke having teeth, and the stator (01) is formed by a yoke having teeth as shown in the figure.
1) with a spacer (7) interposed therebetween. The thickness t of the spacer (7) is the most important dimension corresponding to the gap (4) between the mover (21 and stator (1)) in FIG. 2, and even when a load is applied to it, It is necessary to use a rigid body whose thickness It does not iodine.On the other hand, the magnetic circuit holding part @ has a gate-shaped shape as shown in the figure, and both ends VC thereof are provided with a traveling mechanism.In other words, as shown in the figure, a shaft (
5) and attach the vertical roll (6) through the stator (1).
can freely rotate and move on the surface. Further, a central hole is formed in the center thereof so that the magnetic circuit portion f2° C. fits therein. Therefore, it is sufficient that the dimensions of the central hole @ are processed to such an extent that no gap is formed at the joint surface between the magnetic circuit holding part (a) and the magnetic circuit part Vυ that significantly impedes the formation of a magnetic path. There is no need to finish it more precisely than necessary. When assembling the linear buffless motor according to the present invention, first place a spacer (7) with a thickness of t on the upper surface of the stator (1) as shown in FIG.
Place υ. Next, as shown in the same figure ◎, the magnetic circuit holding part■
After applying a suitable adhesive to the inner surface of the center hole of the magnetic circuit part D and the corresponding upper outer surface of the magnetic circuit part D, insert the center hole of the magnetic circuit holding part into the upper part of the magnetic circuit part D. After aligning the lower part of the holding part (a), vertically push down the holding part to fit it into the magnetic circuit part V, and the vertical row II (6) attached to both ends of the holding part (a) will be attached to the stator. (1) Even after contacting the top surface, they can be glued and fixed together while applying pressure in the direction of arrow C shown in the figure.The above pressure is applied after assembly is completed, and while the linear pulse motor is running. It is preferable that the vertical attraction force acting between the stator (1) and the movable element (2) be approximately equal to the distance between the magnetic circuit section υ and the magnetic circuit holding section (support) as described above. After the stator (1) and mover (2) are completely fixed,
) By removing the nullifier (7) interposed between the stator (1), the state shown in FIG. 3(C) is obtained. Above,
The VC can be assembled in a state in which linear movement is possible while maintaining a predetermined gap (4) accurately. It goes without saying that the method for assembling a linear pulse motor according to the present invention is not limited to the above-described embodiments, and may be modified as appropriate without departing from the gist thereof. For example, in FIG. 3 (5) and C) above, the mover (2
) is equipped with a magnetic force generation source such as an excitation coil (3) (?, see Figure 2), a permanent magnet (not shown), etc. Although the structure is not shown, the magnetic circuit part Qυ and the magnetic circuit are connected as described in n11. The magnetic force generation source may be placed after the holding part (goods) is fixed and integrated, or the magnetic force generation source may be installed in advance on the magnetic circuit part Q]) and then the magnetic circuit holding part is attached. There is no problem even if it is fixedly integrated with the magnetic circuit part
'l) and the division position, shape, etc. of the magnetic circuit holding part can be changed in various ways. Furthermore, the method of fixing the magnetic circuit part Q]) and the magnetic circuit holding part (a) is not limited to the method using adhesive as shown in the above embodiment.
Another method is to use screws and bolts. (Effects) As detailed above, according to the method for assembling a linear pulse motor according to the present invention, the conventional integrated mover is divided into a magnetic circuit section and a holding section equipped with a roll that can move freely in a straight line, and
Since the former is placed with an intervening Nuvaser which has been finished to a predetermined thickness in advance on the upper surface of the stator, it is possible to always accurately manufacture the gap between the mover and the stator. In other words, strict finishing accuracy is no longer required for each component as in the past, which greatly contributes to improving work efficiency and reducing costs. In addition, when adhesively fixing the magnetic circuit section and the holding section, a pressing force equivalent to the vertical suction force that acts between the stator and mover during actual linear pulse motor operation is applied, so it takes less time. pl (it becomes possible to make it as small as possible to 41,
Furthermore, it is extremely effective in improving the characteristics of the linear pulse motor itself.

[Brief explanation of drawings]

Figure 1 is a mechanical diagram showing the running principle of a linear pulse motor.
FIG. 2 is a schematic diagram showing the configuration of a conventional linear pulse motor, and FIGS. 3(2), (G), and (C) are schematic diagrams showing the assembly order of the linear pulse motor according to the present invention. In the figure, stator, 2: mover, 21: magnetic circuit section, 22
: Magnetic circuit holding part, 3: Excitation coil, 4: Gap, 6: Vertical roll, 7: Spacer Applicant Sumitomo Special Metals Co., Ltd. Representative Patent Attorney Seiyu Katamoto Weight=゛Color, :f'':,l'
%. No. Jim

Claims (1)

[Claims] (1) In assembling a linear pulse motor in which a plate-shaped movable element is disposed opposite to a plate-shaped stator with a fixed gap and moves linearly on the stator for each varnu current, the movable element is a magnetic circuit section consisting of a yoke having a section;
The magnetic circuit section is divided into a magnetic circuit holding section that holds the magnetic circuit section facing the stator with a certain gap and is equipped with a mechanism that runs on the stator, and the magnetic circuit section is provided with a spacer corresponding to the gap size. A linear pulse motor characterized in that the magnetic circuit part and the magnetic circuit holding part are assembled and fixed together in a state in which the spacer is placed on a stator with the spacer interposed therebetween, and then the spacer is removed to form a movable element. How to assemble.