JPS61196758A - Two-surface type linear pulse motor - Google Patents

Abstract

PURPOSE:To increase a thrust and to facilitate maintenance and management by placing a movable element which bridges an edge line on a crest-shaped stator in which traveling surfaces are disposed on both sides of the edge line to form the element in a fluid floating structure. CONSTITUTION:A movable element 19 which bridges over traveling surfaces 20A and 20B is placed oppositely on a stator 18 formed with the surfaces 20A and 20B on both sides of a crest-shaped edge line 20C connected linearly with the edge line 20C. Pole teeth trains of the prescribed pitch are arranged near at a right angle to the edge line 20C on the surfaces 20A and 20B of the stator 18. The element 19 has a permanent magnet, a core contacted with the magnet and an exciting coil, and a plurality of injecting pores of pressurized air directed toward the surfaces 20A and 20B of the stator 18.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a linear pulse motor that can be freely controlled to stop by adjusting the number of pulses, and particularly relates to a linear pulse motor that has excellent acceleration and deceleration performance. Ru.

[Conventional technology]

A conventional linear pulse motor that allows the mover to run reliably along a straight line is as shown in Figure 5.6.
A stator l made of a ferromagnetic material has two running surfaces LA% IBY sandwiching an angle of 900 mm, on which a magnetic pole tooth row 2 is carved.

The movable element 3 facing this has an iron core 5 connected to the pole of a permanent magnet 4, and the legs of the iron core 5 are energized.

The coil 6 may be wound around the leg end of the iron core 5 so that only the surface in the direction of the magnetic pole tooth row z faces the pole Y of the permanent magnet 4). The front and rear ends of this movable element 3 have running surfaces IA and 1B on the outside surface.
Support rollers 8A and 8BY are provided in contact with the moving surfaces IA and IB, and a support p-scilla 80 is provided approximately in the center of the movable element 3 in contact with the intersection of the running surfaces IA and IB.

Permanent magnet 4 magnetically attracts mover 3 to running surfaces IA and IB.

trying to wear it. The support rollers 8A, 80 are the mover 3
The movable element 3 is movably supported so as to maintain a distance between the movable member 3 and the running surface IA. The movable element 3 is movable so that the support roller 8B maintains a gap between the movable element 3 and the running surface IB.
support. The exciting coil 6 is connected to the field teeth 7 via the iron core 5.
The forward and backward movement, acceleration, and stopping of the movable element 3 are controlled by adjusting the bias magnetic flux supplied between the magnetic pole tooth row 2 and the magnetic pole tooth row 2. (Such a technique is also described in JP-A-58-1924632).

Another technique is explained with reference to Figure 7.8.
Regular spacing between a pair of horizontally long plate-shaped side yokes '110! Therefore, both ends of the yoke are fixed to the fixing plate 14 so as to hold the center yoke 12, magnets 13 are arranged on the inner wall surface of the side yoke 11 to form the stator 10, and a minute gap is formed around the outer periphery of the side yoke 11. Ki with.

A movable coil 16 is provided in the carrier 15 to fit around the outer periphery of the center yoke 12 with a minute gap, and several zelkova 111 are fitted on the inner surface of the carrier 15.
It has 17 small exhaust holes. In this way, a gas layer is generated on the sliding surface between the stator lO and the carrier 15, and the running resistance of the carrier 15 is greatly reduced. [Problems to be Solved by the Invention] In the first prior art, in order to support the movable element 7, the stator does not have support roller running surfaces on both sides of the magnetic pole tooth row. If the angle of the running surfaces IA, 1B6Q exceeds 180"7', the mover will extend laterally more than the stator, making the space occupied by the linear motor even larger, which will limit the space it occupies. Therefore, it was not possible to create a motor with large thrust.

The second prior art is a side-type device in which only both ends are fixed.

Since the distance between the yoke and the center yoke easily changes due to deflection, short and small linear motors are limited, and long motors cannot be obtained.

The object of the present invention is to provide a long linear pulse motor with a large thrust. 1. .

[Means for solving problems]

In the present invention, gonads are arranged in two planes on a stator having planes formed on both sides of a chevron-shaped gonad in which gonads are arranged in a straight line.

The movable element is equipped with a permanent magnet that supplies bias magnetic flux to the movable unit facing each plane, an iron core and an excitation coil in contact with the permanent magnet, and is provided with a plurality of small jet holes for pressurized air directed toward the plane of the stator.
:l11,3 According to the above configuration, the combination of the air floating structure movable element and the chevron shaped stator is fixed by the fumes.

The movable element can be moved by easily removing dust and foreign objects on the element.

By eliminating the running surface of the support roller from the stator, the frictional resistance is greatly reduced. The magnetic pole teeth can be arranged on the entire surface of the stator, and the thrust can be greatly increased. A reinforcing member can be freely attached to the back of the stator, resulting in a strong and highly accurate stator, which stabilizes the running of the movable element.

〔Example〕

One embodiment of the present invention! l' is shown in Fig. 1, Fig. 2 is a view cut at right angles to the moving direction of the mover, Fig. 3 is a view taken along arrow D-D in Fig. 2, and Fig. 4 is a view taken along arrows in Fig. 2. View i-m is shown. In FIG. 1, the movable element 19 is placed across the wedge line of the chevron-shaped stator 18. Stator 18. ,.

15200, a non-magnetic solid material is embedded between and around the magnetic pole teeth, and the upper surface thereof is formed into a flat surface.

(The lower sides of the running surfaces 20A and 20B are vertical bars, covers, etc. 4.

A connecting member 22 may also be provided. ) The mover 19 has a magnetic pole tooth row 21A in a non-magnetic case 23.
.

Movable units facing 2113) 24A,
24B and a fluid pressure pipe 25 are installed inside. Movable unit) 24A, 28BY winding, field teeth 29A% 2913Y protruding from the leg ends of the iron core opposite to the magnetic pole tooth row 21. Field teeth 29A, 2 in the legs of the iron core, 27A, 27B
The pinch of 9B is equal to the pitch P of the magnetic pole teeth, and the iron core ji!
'7A, 2? E The pitch between the inner legs is I'(N+”/2)
The iron cores 2'7A in the permanent magnets 26A and 26B,
The pitch between the permanent magnets 26AS26B is PxQ, and each permanent magnet 26A, 26B has a movable unit 24A.
, 24B Y configuration.

A pressure pipe 25 is arranged between and to the side of the iron cores 2'7A and 27B in the case 23, and from this pipe 25 to the excitation coil 2f3, the running surface 2CA passes between :2BB,
A small ejection hole 30 is provided opposite to the case 20B, and a filling layer 31 of a non-magnetic fixing material is formed in the space inside the case 23.
1 is a surface 31A facing parallel to the running surface 20AS20B,
A pocket 32 is formed in 31B with the small jet hole 30 in the center.

The operation of each part of the embodiment will be explained.

The chevron-shaped stator effectively removes the dead weight of foreign matter. Yamagata's side dish, magnetic pole tooth row arranged close to each other.

Then, the field poles of the movable elements facing each other come close to each other, and the linear motor is assembled into a small unit.

In the movable element placed across the n-line, magnetic absorbing coins on the two running surfaces act in the direction of the movable element to eliminate lateral vibration. By creating a pressure air floating structure for the movable element that straddles the trowel wire, not only does the friction between the stator and the movable element disappear, but also side slipping is eliminated by the convergence line, and the flow rate is greater than when the 31B and 31B are independent. The amount of air becomes smaller, and the outflowing air collects on the stator and blows foreign matter, which can be easily removed from the stator.In addition, the chevron-shaped stator allows reinforcement members to be attached freely to the underside of the stator. Strength glue can be made into a near motor.

〔Effect of the invention〕

In this invention, a movable element that straddles the soft line Y is placed on a chevron-shaped stator with running planes arranged on both sides of the red line, and the movable element has a fluid floating structure. Even if the mover floats up, it eliminates side slippage of the mover, eliminates contact friction, and has a small axis between the running surface and the mover.

Even if dirt or foreign matter adheres to the running surface while the operation is stopped,
The flow can be removed with a small amount of ejected fluid, making it possible to create a highly accurate, high-speed linear pulse motor that is easy to maintain and manage.

[Brief explanation of drawings]

Fig. 1 is an external view of the present invention, Fig. 2 is a sectional view thereof, Fig. 3 is a view taken along arrow D-D in Fig. 2, and Fig. 4 is a view taken from the 1° arrow in Fig. 2.
-Figure E and Figure 5 are diagrams of the conventional two-plane linear motor, E6
The drawings are a view taken along the line A-A in FIG. 5, a view taken along the arrow B-B in FIG. 7, and FIG. 7 a view of a conventional air support linear motor. 18: Stator, 19: Mover, 2OA, %20B=running surface, 2oO: tilting, kite, 21E=magnetic pole tooth row 526A, 2
6B: Permanent grinding stone, 2'7A, 2'7B: Iron core, 2
8A, 28B: Excitation coil, 29A, 29B:
Field tooth, 30: Ejection hole. , 8

Claims (1)

[Claims] An iron core with an excitation coil wound around a permanent magnet is connected to a mover facing the magnetic pole tooth row arranged on the stator, and the iron core is opposed to each other so that a bias magnetic flux is created between the field teeth of the iron core and the magnetic pole tooth row. A linear pulse motor is characterized in that a stator has a running plane having a magnetic pole tooth row arranged on both sides of a ridgeline, and a movable element that straddles the ridgeline is provided with a plurality of small ejection holes facing the running surface. Two-sided linear pulse motor.