RU2366065C1 - Linear stepper electromagnetic motor - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: invention relates to electronics and can be used for making a machine with discrete translational unrestricted motion of the actuating element. The device contains a stator, which consists of a side member (2) and a bottom part (1). A winding (9) is put into a stator bore. The armature is composite and consists of a cylindrical part (3) and has disc-shaped part (4) on the side of the guide housing (6). Between the bottom part of the stator (1) and the cylindrical part of the armature (3) there is recoil spring (10). The actuating element (13) can be in form of a rope, flexible bar or wire, let through the axial channel of the armature through an opening in the guide housing (6) and the bottom part of the stator (1). Power articulation of the actuating element with the armature in the working stroke is provided by spring-loaded keying on cone-shaped elements (11), for example in form of locking pieces, opened by a releasing mechanism in form of a double-arm swivelling lever (5) during the working stroke, put into the cavity of the disc-shaped part of the armature (4) with one arm, and on locking members (11) by the second arm. The lever has a through-hole where the actuating element is put. Coaxiality of the armature and the stator is provided by guide pins (8).

EFFECT: simpler design with widening of operating capabilities and field of use.

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Description

The invention relates to electrical engineering, in particular to linear stepper motors, and can be used to create machines with discrete translational unlimited movement of the working body.

Known electromagnetic linear motor for discrete movement (see AS USSR No. 1483563, MKI H02K 41/03, publ. 05/30/89, bull. No. 20), containing a housing inside which an electromagnet is located, an anchor located inside it with the main rod, locking elements on the housing that engage with the guide stops, additional rod, travel stop and flange.

However, in such an electric motor, the working body that performs discrete movement is the body of the electromagnet itself, which limits its scope.

Linear stepper motors are also known (see AS USSR No. 985893, MKI H02K 41/03, publ. 30.12.82, bull. No. 48; AS USSR No. 1363395, MKI H02K 41/03, publ. 30.12 .87, bull. No. 48.), in which the discrete movement of the working body is carried out under the influence of electromagnetic forces created alternately by several windings.

These devices have a complex design, require special electrical converters that control several windings, and cannot be used as power elements of the drive.

The closest analogue of the proposed technical solution is a linear stepper electromagnetic motor containing a stator, a winding, a combined armature made in the form of a cylinder with a disk part, a return spring and a guide housing. One end of the anchor has a cylindrical groove to accommodate the return spring, the other end is equipped with locking elements - doggies - in the form of flat, spring-loaded, radially movable sectors, the role of the guide rods and the working body of the engine is performed by the anchors placed in the through axial channel and discretely moved by it on each a working stroke with the help of dogs, a unidirectional gear rod, fixed from reverse movement when the anchor is returned by the spring and dogs on the motor stator (see RF patent for useful fashion . S № 59343, IPC H02K 41/03, published 10.12.2006, Bul № 34. - 3)..

The disadvantage of this solution is the need to manufacture a working body with a rigidly sustained longitudinal profile, which makes its manufacture more expensive and limits the area of engine use.

The objective of this solution is to develop a linear stepper electromagnetic motor with an axial channel, which can be used as power elements of the drive.

The technical result consists in simplifying the design while expanding the operational capabilities and applications of the device.

The task is achieved by the fact that in the proposed device the working body is made in the form of a smooth, flexible rod or cable of the required length passed into the engine’s axial channel, the transmission of the working force to the rod or cable is ensured by spring loaded against the armature working stroke, placed inside its conical groove and protruding above it with the disk part, locking elements jamming the cable or the rod, which are opened when the retracted anchor stops with the two-arm rotary lever on its disk part, made with the ability to provide an emphasis with one shoulder at the end of the stator, and with the other at the stop elements to ensure that they open when the retracted armature stops.

The drawing shows the design of the proposed linear stepper electromagnetic motor, where

1, 2 - stator;

3 - cylindrical part of the anchor;

4 - disk part of the anchor;

5 - rotary two-arm lever;

6 - a directing case;

7 - the outer arm of the lever;

8 - guide pins;

9 - winding;

10 - a return spring;

11 - locking elements in the form of cams;

12 - spring for spring locking elements;

13 - working body.

The device comprises a stator, consisting of a side part 2 and a lower part 1. A winding 9 is placed in the stator bore. The armature is combined and consists of a cylindrical part 3 and a flat disk part 4 from the side of the guide body 6. Between the lower part of the stator 1 and the cylindrical part of the armature 3, a return spring is placed 10. The working body 13 can be made in the form of a cable, a flexible rod or wire, passed into the axial channel of the armature through the holes in the guide housing 6 and the lower part of the stator 1. Power joint of the working body and the armature is provided on the working stroke the spring-loaded by a spring 12 is wedged conical elements 11, for example in the form of cams, which are placed inside the tapered bore formed in the disk portion of the armature 4, and extend above it (disc portion). The cams are opened during idling by the opening mechanism in the form of a two-shouldered pivot arm 5, placed with one shoulder in the groove of the disk part of the armature 4, and the second on the locking elements 11. The lever 5 has a through hole for accommodating the working body. The alignment of the armature and the stator is set by guide pins 8.

In the initial state, the anchor 3, 4 is pressed by the return spring 10 to the guide body 6, and the axially spring-loaded locking elements 11 fully enter the conical groove of the anchor and tightly surround the working body 13 along the lateral surface. When a supplying electric pulse from the source is supplied to the winding 9, the armature 3, 4 is pulled into the winding 9 by the action of electromagnetic force, compressing the return spring 10. Insignificant mutual axial movements of the locking elements 11 and the disk part of the armature 4 contacting along the conical surface create significant radial forces , reliably clamping the working body 13, which is moved by the working stroke anchor by a value of δ. After the armature is pulled into the winding, the lever 5 is supported by the external arm 7 on the end surface of the lateral part of the stator 2, axially displaces the locking elements 11 and, compressing the spring 12, opens the working element 13 and the armature, which at the end of the supply pulse returns spring 10 to the original position, and the cycle repeats.

Claims (1)

A linear stepper electromagnetic motor containing a guiding body in which a stator, a winding and a combined armature including cylindrical and disk parts, a working body located in the axial channel of the armature and equipped with locking elements with an opening mechanism and a return spring, characterized in that the working body made in the form of a smooth, flexible rod or cable, the locking elements are made in the form of conical elements, spring-loaded counter to the working stroke of the armature and placed inside the conical groove, made in the disk part of the anchor, and protruding above the disk part, the opening mechanism is a two-arm rotary lever located on the disk part of the armature, made with the possibility of providing an emphasis with one shoulder on the end face of the stator and the other in the stop elements to ensure their opening when the retractor stops anchors.