CN104882242B - Electromagnet used for electronic multi-arm reading mechanism - Google Patents

Abstract

The invention discloses an electromagnet used for an electronic multi-arm reading mechanism. The electromagnet comprises a hollow electromagnetic coil, a permanent magnet and a movable iron core which is arranged in the hollow electromagnetic coil in a swingable manner, wherein the permanent magnet is arranged on the outer wall of the hollow electromagnetic coil and is positioned on the swinging plane of the movable iron core. The electromagnet is sensitive in action and quick in dynamic response, the action frequency of the electromagnet can be improved, the power weight ratio of the electromagnet is large, and the work heat stability is improved.

Description

Electromagnets for Electronic Dobby Reading Mechanisms

technical field

The invention relates to an electromagnet, in particular to an electromagnet used in an electronic multi-arm reading mechanism.

Background technique

The electronic dobby is one of the three major opening devices of the mechatronic loom. A part of the weaving signal of the loom fabric is processed by the computer in real time and becomes a heald signal, which is added to the electromagnet electromagnetic coil of the electronic dobby reading mechanism. The electromagnetic force generated by the iron is converted into the swing action of the moving iron core to drive other transmission mechanisms to lift the heald frame of the loom, and finally realize the opening of the warp yarn of the loom and the weaving of patterns.

At present, the electromagnets used have the following defects: first, the electromagnet adopts a U-shaped iron core, a single coil, and a structure in which the armature swings around the axis after the coil is energized, which consumes a lot of energy, increases the temperature, and has poor thermal stability. Secondly, the structural form of U-shaped iron core, single coil and armature swinging around the shaft cannot greatly increase the operating frequency of the electromagnet.

These above-mentioned problems affect the improvement of production efficiency and loom productivity, meanwhile, the poor thermal stability of the electromagnet also affects the improvement of fabric quality.

Contents of the invention

In view of the deficiencies of the above-mentioned prior art, the object of the present invention is to provide an electromagnet for an electronic dobby reading mechanism that meets the requirements of actual production, works stably, and whose operating frequency can be significantly improved.

The technical solution of the present invention is as follows: the electromagnet used for the electronic multi-arm reading mechanism includes a hollow electromagnetic coil, a permanent magnet and a moving iron core that is swingably arranged in the hollow electromagnetic coil, and the permanent magnet is arranged in the hollow electromagnetic coil. The outer wall of the coil is on the swing plane of the moving iron core.

Further, the hollow electromagnetic coil includes a hollow frame and a coil, the coil is wound on the hollow frame, the moving iron core is arranged in the hollow frame, and the lower end of the moving iron core is hinged to the hollow frame.

Further, it includes a casing, the hollow electromagnetic coil is fixedly linked with the casing, the casing is provided with an opening on one side, and the moving iron core protrudes out of the casing through the opening.

Preferably, both sides of the hollow electromagnetic coil are provided with limiting pieces that limit the swing range of the moving iron core.

Preferably, the housing is U-shaped, and the cross-section of the hollow skeleton is rectangular.

The advantage of the technical solution provided by the present invention is that the electromagnetic force of the electromagnet synthetic magnetic field produced by the electromagnetic coil and the permanent magnet directly drives the moving iron core to swing and drives the transmission part of the reading mechanism, which is sensitive in action and fast in dynamic response, thereby improving The operating frequency of the electromagnet. The power-to-weight ratio is large. Under the same size of the electromagnet, the drive current is small, the heating of the electromagnet is improved, and the thermal stability of the electromagnet is improved. The electromagnet has the advantages of simple structure, good manufacturability, reliable operation, and the cost is equivalent to U-shaped electromagnet.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a schematic diagram of the three-dimensional structure of the present invention.

Fig. 3 is a schematic diagram of the structure of the moving iron core swinging to the side of the permanent magnet.

Fig. 4 is a schematic diagram of the structure of the moving iron core swinging to the side away from the permanent magnet.

Figure 5 is a schematic diagram of the electrical system.

detailed description

The present invention will be further described below in conjunction with the examples, but not as a limitation of the present invention.

Please refer to FIG. 1 and FIG. 2 , the electromagnet used in the electronic multi-arm reading mechanism of the present invention includes a U-shaped housing 7 . A hollow electromagnetic coil 9 with a rectangular cross section is arranged in the U-shaped casing 7 , and a gasket 2 is arranged between the bottom of the hollow electromagnetic coil 9 and the casing 7 . The hollow electromagnetic coil 9 includes a hollow skeleton 1 with a rectangular cross section, and the coil 8 is wound on the hollow skeleton 1 . The cross-shaped moving iron core 4 is arranged inside the hollow skeleton 1, protruding from the opening side of the U-shaped housing 7, and one end of the moving iron core 4 is hinged with the hollow skeleton 1 through the rotating shaft 3, so that the moving iron core 4 can be in the hollow electromagnetic The coil 9 oscillates inside. A permanent magnet 6 is arranged on the outside of the hollow electromagnetic coil 9, the permanent magnet 6 is in the same plane as the swing plane of the moving iron core 4, and is close to the open end of the U-shaped housing 7, and knuckles are respectively set on the two outer sides of the hollow electromagnetic coil 9 The limiting piece 5 is used to limit the left and right swing range of the moving iron core 4.

3 to 5, the electromagnet uses an external switching power supply 10 and is controlled by an external electronic switch 11, and the electronic switch 11 is controlled on and off by an electronic dobby raising signal. The 48-volt voltage output by the switching power supply 10 is added to the two ends of the coil 8 through the electronic switch 11. When there is no lifting signal, the electronic switch 11 is turned on, and the coil 8 is not powered. At this time, no electromagnetic field is generated, and only the electromagnetic field exists in the magnetic circuit of the electromagnet. The magnetic field of the permanent magnet 6, under the magnetic force of the magnetic field of the permanent magnet 6, the moving iron core 4 swings around the rotating shaft 3 in the direction of the permanent magnet 6 side, and the moving iron core 4 does not drive other transmission parts of the electronic dobby to carry out the heald frame of the loom. When the lifting signal is added to the electronic switch, the electronic switch 11 is turned on, and the 48 volt voltage is added to the two ends of the coil 8 to generate an electromagnetic field opposite to the direction of the permanent magnet 6 magnetic field, and the intensity of this electromagnetic field is greater than the magnetic field of the permanent magnet 6, Therefore, under the magnetic field force of the synthetic magnetic field of the electromagnetic field and the permanent magnet 6 magnetic fields, the moving iron core 4 swings around the rotating shaft 3 in a direction deviated from the permanent magnet 6, and now the swing of the moving iron core 4 drives other transmission parts of the electronic dobby to complete the weaving Lifting of the heald frame, opening of the warp. Controlled by the hedging signal, the continuous reciprocating swing of the moving iron core 4 of the electromagnet realizes the braiding of the pattern fabric of the loom like this.

Claims (4)

1. an electromagnet for electronic multi-arm reading mechanism is characterized in that: comprise U-shaped housing (7), hollow electromagnetic coil (9), permanent magnet (6) and be arranged on hollow electromagnetic coil ( 9) the moving iron core (4) inside, the hollow electromagnetic coil (9) is fixedly connected with the U-shaped casing (7), the U-shaped casing (7) is provided with an opening on one side, and the permanent magnet (6 ) is arranged on one side of the outer wall of the hollow electromagnetic coil (9) close to the opening of the U-shaped housing (7), and is in the swing plane of the moving iron core (4), and the moving iron core (4) is Cross-shaped, the U-shaped housing (7) protrudes from the opening. 2. The electromagnet for electronic multi-arm reading mechanism according to claim 1, characterized in that: the hollow electromagnetic coil (9) comprises a hollow skeleton (1) and a coil (8), and the coil (8) Wound around the hollow frame (1), the moving iron core (4) is arranged in the hollow frame (1), and the lower end of the moving iron core (4) is hinged to the hollow frame (1). 3. The electromagnet for electronic multi-arm reading mechanism according to claim 1, characterized in that: the two sides of the hollow electromagnetic coil (9) are provided with limiting pieces ( 5). 4. The electromagnet for electronic multi-arm reading mechanism according to claim 2, characterized in that: the cross section of the hollow frame (1) is rectangular.