JPS5814701Y2 - Magnetic flux generator for linear pulse motor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mechanism of a magnetic flux generator forming the primary side of a permanent magnet type linear pulse motor.

Generally, a linear pulse motor has a magnetic flux generator on the primary side and two
It has a scale on the next side, the scale is fixed, and the magnetic flux generator is configured to reciprocate as a slider along this scale.

As shown in FIG. 1, this linear pulse motor has a scale 1 whose cross section has irregularities at equal intervals, and toothed iron cores 2b1 each having a half pitch larger than the pitch of the scale 1 at both ends of a permanent magnet 2a. 2b2 is attached, and the toothed cores 2b1 and 2b2 of each pole face a magnetic flux generating device 2 equipped with a winding 2C that is excited with different polarities, and the direction of the excitation of the winding 2C is alternately reversed. The magnetic flux generating device 2 as a slider is moved by one pitch at a time.

Since this linear pulse motor can travel a distance proportional to the number of input pulses, it is particularly useful for simple open-loop control of control systems, and is widely used in drive parts of computers, numerical control devices, printers, etc. It has been adopted.

However, this type of permanent magnet type linear pulse motor has a toothed iron core of 2bt.

2b2 have different polarities, so they must be magnetically insulated and cannot be punched out as one piece.

For this reason, conventionally, the assembly of the two tooth cores 2b1 and 2b2 to maintain a constant ratio of the tooth spacing between the two tooth cores 2b1 and 2b2 to the tooth spacing of the scale 1 is extremely troublesome work and requires a complicated configuration. This is what I used to do.

The purpose of this invention is to permanently fix the toothed iron cores, which are magnetically insulated from each other, to both side plates made of non-magnetic material with a predetermined spacing based on caulking pins, with a very simple process and structure. An object of the present invention is to provide a magnetic flux generating device for a magnet type linear pulse motor.

The illustrated embodiment will be specifically described below.

Figure 2 is a component configuration diagram of a linear pulse motor magnetic flux generator with windings omitted, and Figure 3 is a partially cutaway side view of the finished product.
In each figure, reference numerals 11 and 12 indicate toothed iron cores, each of which is constructed by punching out steel plates and laminating them.
It is assumed that a, 12a and positioning holes 11b, 12b are formed in advance when punching a steel plate.

Reference numerals 13 and 14 denote side plates made of a non-magnetic material, for example, formed by punching and laminating thin plates.

The side plates 13 and 14 have positioning holes 11b and 12 for regulating the mounting position of the tooth cores 11 and 12.
b is formed, and the toothed core 11.b is formed by the caulking pin 15.
12 and side plates 13 and 14 are integrally fixed.

At this time, shaft holes 13 a and 14 a that are continuous with the wheel shaft holes 11 a and 12 a are formed in each of the side plates 13 and 14 .

A permanent magnet 16 is magnetized with the polarity shown in FIG. 2, and is attracted to the back surface of the tooth core 11 and 12.

17 is a magnetic path iron plate, which is the toothed iron core 11.12 of the permanent magnet 16.
It is attracted to the side that is not in contact with.

An excitation winding 18 is wound around each tooth of the tooth core 11 and 12.

Reference numeral 19 denotes a guide wheel for the magnetic flux generator as a slider, and its axes are formed in shaft holes 11 a , 12 a , and 13 a formed in the tooth core 11.12 and the side plates 13.14.
and 14a, which are supported by passing through holes that are in a straight line.

20 is a scale forming the secondary side of the linear pulse motor.

In the above configuration, when the two tooth cores 11.12 are fixed to the side plates 13.14 based on the caulking pins, each tooth of each tooth core 11.12 is in a predetermined position in a magnetically insulated state. The magnetic flux of the permanent magnet 16 is regulated from the tooth core 11 to the scale 20 to the tooth core 12 to the permanent magnet 1.
6 → magnetic path iron plate 17 → passes through permanent magnet 16.

Under this condition, the excitation winding 18 is switched and excited in accordance with the principle shown in FIG. The magnetic flux generator as a slider initiates a walking motion.

In this way, the magnetic flux generator moves guided by the wheels 19 by a distance directly proportional to the number of excitation pulses applied to the excitation winding 18.

As described above, the device according to the present invention has a plurality of toothed iron cores to be magnetically insulated from each other, with the positioning holes facing each other in the side plate made of a non-magnetic material that is abutted from both sides. The toothed iron core is fixed to both side plates using caulking pins.

Based on this configuration, a permanent magnet type linear pulse motor is formed on the toothed core by punching or the like as a positioning means for maintaining a constant spacing while providing magnetic insulation from each other. A hole opposite to the positioning hole is formed in the side plate, and the spacing between each toothed core can be determined with high precision by mechanically tightening without requiring any skill. Therefore, it is possible to obtain a magnetic flux generating device for a linear pulse motor that requires fewer assembly steps without creating any complicated structure.

[Brief explanation of drawings]

FIG. 1 is a principle diagram of a linear pulse motor, FIG. 2 is a component diagram of the linear pulse motor according to the present invention, and FIG. 3 is a partially cutaway side view of the linear pulse motor according to the present invention. 11.12...Tooth core, llb, 12b...
...Positioning hole, 13.14...Side plate, 1
3 b, 14 b...Positioning hole, 15...
...Caulking pin, 16...Permanent magnet, 18
...Excitation winding.

Claims (1)

[Scope of utility model registration request] Positioning holes are formed in the lateral direction for a plurality of toothed cores, and when the toothed cores on both side plates made of non-magnetic material are magnetically insulated from each other and are spaced apart from each other at a predetermined distance. A positioning hole is formed in the position where the positioning holes of each of the tooth cores face each other, and a caulking pin is formed in each of the positioning holes of each tooth core and both side plates that are arranged in a straight line. In addition to penetrating
A linear pulse motor fixed by caulking, the toothed iron core having an excitation winding for regulating magnetic flux generating teeth, and a permanent magnet bonded to the back surface of the toothed iron core which does not have teeth. magnetic flux generator.