JPS6152149A - linear motor - Google Patents

Abstract

PURPOSE:To readily supply a current to a winding even for a long stroke by providing a conductive plate which is fed in contact with a conductive cylinder in response to the cylinder connected with the winding. CONSTITUTION:Magnetic shafts 10a, 10b, 10c are sequentially excited by the first conductive plates 19a-19c, the first conductive cylinders 13a-13c, windings 12a-12c, the second conductive cylinders 15a-15c and the second conductive plates 21a-21c to move a movable element 9 in a direction of an arrow C. On the contrary, the shafts 10a, 10b, 10c are sequentially excited to move the element 9 toward the direction of an arrow D. Thus, even for a long stroke, the windings 12a-12c are readily energized and simply constructed.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a linear motor.

Conventional configuration and problems thereof A conventional linear motor is shown in FIGS. 3 and 4. That is, l is a mover, 2a, 2b, 2c are shafts made of magnetic material, 3a, 3b, 3c are bearings that rotatably attach the windings 4a + 4b, 4c and the shafts 2a, 2b, 2c, These windings 4a.

4b and 4c are held at a predetermined interval by a connecting plate 5. Reference numeral 6 denotes a stator, on which U-shaped iron cores 7a to 7g are fixed at regular intervals in the running direction of the movable element 1 by nonmagnetic bodies 8a to 8h. The end faces of the U-shaped cores 7a to 7g of the stator 6, which become the magnetic poles, are integrally formed into a flat surface with the nonmagnetic materials 8a to 8h, and these flat surfaces serve as a pair of running surfaces, and the shafts 2a to 2c of the mover l They are in rotatable contact.

A linear motor having such a configuration operates as follows.

When an exciting current is applied to the winding 4a in the state shown in Fig. 3, the shaft 2a
A magnetic circuit is formed through which magnetic flux passes through the U-shaped iron core 7b. As a result, the shaft 2a and the U-shaped iron core 7b are brought into close contact with each other by magnetic attraction and remain stationary at the illustrated position. Next, when the current in the winding 4a is cut off and the winding 4b is energized, a magnetic attraction force acts between the shaft 2b and the U-shaped iron core 7c, and the shaft 2b rotates on its own while moving above the stator 6 to the left as shown in the figure. direction, and comes to rest with the shaft 2b and the mouth-shaped iron core 7c in close contact with each other. By sequentially energizing the windings 4a, 4b, and 4c of the mover 1 in this way,
The mover 1 moves on the stator 6.

However, when this linear motor requires a particularly long stroke, a long power supply line must be used to supply power to the windings 4a to 4b, which not only makes the process complicated, but also causes the movement of the mover 1. This has the disadvantage that it causes a large load on the motor, reducing the overall output of the linear motor.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention provides a small linear motor with a simple configuration in which the movable element can wirelessly supply power to the windings without applying a load to the movable element even during long strokes. It is an object.

Structure of the Invention The present invention provides a movable element in which a plurality of magnetic shafts are supported in parallel at predetermined intervals and windings are wound around each of the magnetic shafts, and the magnetic shafts are mounted at two locations in the axial direction. a stator having a magnetic body each having a supporting running surface and forming a magnetic path between the running surfaces at a predetermined interval different from the arrangement spacing of the magnetic shafts; conductor rings arranged at different positions in the axial direction between body axes and electrically connected to the windings; and conductor rings arranged parallel to the stator in correspondence with the respective conductor rings. It is characterized by comprising a power supply linear conductor that runs in contact with the power supply. Therefore, it has the unique effect that power can be easily supplied to the windings with a simple configuration without increasing the load even with a long stroke.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 and 2. That is, 9 is a mover, 10a to 10c are magnetic shafts rotatably supported in parallel at predetermined intervals by a side plate 11, and 12a to 12c are magnetic shafts 103 to 10c.
The windings 13a to 1 are respectively wound and fixed on 10c.
3c is a first conductive cylinder connected to the starting ends of the windings 12a to 12c and fixed to the magnetic shafts 10a to 10C via the insulator 14, and 15a" and 15c are the terminal ends of the windings 12a to 12c. A second conductive cylinder 17 is connected to the magnetic shafts 10a to 10c through an insulator 16 and fixed to the magnetic shafts 10a to 10c, respectively.
A stator 19a to 19C having a pair of running surfaces 18 that rollably support the stator 19A to 19C are insulated and fixed in parallel with each other via an insulating material 20 along the stator 17. The first conductive plates 21a to 21C, which are in contact with parts of the cylinders 13a to 13c, respectively, are insulated and fixed parallel to the stator 17 via an insulating material 22, and are fixed to the second conductive cylinder 15. a-15c, second conductive plates 23a to 23a are provided so as to be in rolling contact with a part of a-15c, respectively;
Reference numeral 23r denotes a square-shaped iron core fixed at predetermined intervals in the running direction of the movable element 9 using non-magnetic materials 243 to 24g. Further, the end faces of the mouth-shaped iron cores 23a to 23f of the stator 17, which become the magnetic poles, are integrally formed into a flat surface with the nonmagnetic materials 23a to 23g, and this flat surface becomes a running surface, and the magnetic shafts 10a to 1 of the movable element 9
0c is in rotatable contact.

The operation of the near motor configured as described above will be explained below. First, in the state shown in FIG. 1 and FIG.
By flowing the magnetic flux through a circuit passing through the second conductive cylinder 15a and the second conductive plate 21a, magnetic flux passes through the magnetic shaft 10a and the mouth-shaped iron core 23b, forming a magnetic circuit. As a result, the magnetic shaft 10a and the mouth-shaped iron core 23b are brought into close contact with each other by magnetic attraction, and the excitation current to the zero-order winding 12a, which is stationary at the position shown in the figure, is cut off, and the first conductive plate 19b is controlled by a control device (not shown). , first conductive cylinder 13b.

Winding wire 12b, second conductive cylinder 15b, second conductive plate 2
1b, a magnetic attraction force acts between the magnetic shaft 10b and the head-shaped iron core 22c, and the magnetic shaft 10b rotates itself and attracts the stator 17.
moving in the direction of arrow C on the running surface 18 of the magnetic material axis tob.
and the mouth-shaped iron core 22c stand still in close contact with each other. In this way, the first conductive Fj, l9a to 19c, the first conductive cylinders 13a to 13C, the a lines 12a to 12c,
2nd conductive outer circle @] 5 a ~], 5 c, 2nd
The magnetic shafts 10a and 10b are
, loc, the mover 9 moves as shown by the arrow C.
direction, and vice versa, the magnetic material axes 10a, lOc, 10
By sequentially energizing b, the movable element 9 moves in the direction of the arrow.

As described above, according to this embodiment, the magnetic shafts 10a to IOC are rotatably supported in parallel at predetermined intervals, and the windings 12a are wound and fixed around the magnetic shafts 102 to LOc, respectively. ~12c and these windings 122~12G
first conductive cylinders 13a to 13C and second conductive cylinders 153 to 15C, which are connected to the starting end and the terminal αji1 and respectively fixed to the magnetic shafts 10a to 10c via insulators 14.16; a stator 17 having a running surface 18 that supports the magnetic shafts 10a to 10c in a freely movable manner; conductive cylinders 13a to 13C and second conductive cylinders 152 to 15C
The first conductive plates 19a to 19c and the second conductive plates Fj, 212 to 21c are provided so as to be in rolling contact with a part of the
By providing the windings 123 to 12G, it is possible to easily and simply supply power to the windings 12a to 12c even in the case of a long stroke, and not only does the load on the mover 9 not increase, but also the windings 123 to 12G The magnetic shafts 10a to 10C can be fixed, the mover 9 can be made wireless, and a small linear motor can be provided as a whole.

In addition, in this embodiment, the conductor for power feeding is connected to the conductive plates 19a to 19a.
9C and 21a to 21c, conductive wires supported at both ends with an insulator at a predetermined interval while applying a constant tension may also be used.

Effects of the Invention As described above, according to the present invention, power can be easily supplied to the windings even during long strokes with a simple configuration, the load does not increase, and the movable element is wireless. A small linear motor can be provided, and its practical effects are great.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a linear motor according to an embodiment of the present invention.
FIG. 2 is a side view thereof, FIG. 3 is a side view of a linear motor according to an embodiment of the conventional example, and FIG. 4 is a sectional view thereof.

Claims (1)

[Claims] A movable element that supports a plurality of magnetic shafts in parallel at predetermined intervals and has a winding wound around each of the magnetic shafts, and a running surface that supports each of the magnetic shafts at two locations in the axial direction. and a stator having a magnetic material that forms a magnetic path between running surfaces at a predetermined interval different from the arrangement spacing of the magnetic material shafts; Conductor rings arranged at different positions in the axial direction and electrically connected to the windings, and power supply lines arranged parallel to the stator and running in contact with the conductor rings corresponding to each conductor ring. A linear motor with a shaped conductor.