TW201419713A - Fixing device for core magnet of permanent-magnetism motor - Google Patents

Abstract

A fixing device for the core magnet of a permanent-magnetism motor mainly comprises a core body, a covering sheet, a plurality of magnets, and a plurality of positioning sheets, wherein the periphery of the core body is configured with insertion grooves arranged at intervals. The covering sheet is configured with positioning parts arranged at intervals while these positioning parts are configured with fixing holes. The positioning sheets are separately configured with tapped holes, so that the positioning sheets are inserted into the insertion grooves of the core body, and after a magnet body is adhered to the periphery of the core body, the covering sheet is set to cover the outer fringes of the magnets. By means of screws passing through the fixing holes to be locked into the tapped holes of the positioning sheets, the magnets are fixed, so that the magnets will not peel off due to the high-speed revolution.; and because the magnets are covered and fixed by the covering sheet, the magnetic force will not be impeded, which enhances the service life of the motor.

Description

Permanent magnet motor shaft magnet fixing device

The invention relates to a permanent magnet motor shaft magnet fixing device, in particular to a permanent magnet motor shaft magnet fixing device which tightly coats a magnet so as not to fall off due to high speed rotation, thereby improving the service life of the motor.

According to the difference in design of the general permanent magnet motor, although the structure is different, most of them have the loss of falling off when the magnet is detached at high speed. The reason is:

1. The embedding efficiency of the magnet is poor, and the magnetic force is hindered by the external iron.

2. In the case of glass fiber coating, the glass fiber is easily broken and the motor is damaged.

3. Covering with a round white iron will also cause looseness and damage the motor.

In view of this, the applicant has been adhering to the experience of the business for many years. After continuous research and experimentation, the company has improved the magnets of the permanent magnet motor so as not to loosen easily, so as to improve the service life of the motor.

The main object of the present invention is to provide a permanent magnet motor shaft magnet fixing device, which tightly coats the magnet of the outer edge of the shaft center so as not to fall off due to high-speed rotation, thereby improving the service life of the motor.

The above-mentioned permanent magnet motor axial magnet fixing device comprises a shaft core body, a covering sheet and a plurality of magnets, and a plurality of positioning pieces. Wherein, the shaft center system is provided with a groove arranged at intervals on the circumference, and the cover sheet is provided with a positioning portion arranged at intervals, and the positioning portion is fixed The holes, the positioning pieces are respectively provided with screw holes, so that the positioning pieces are embedded in the slot of the shaft body, and the magnet is attached to the periphery of the shaft body, and the cover sheet is wrapped around the outer edge of the magnet. The screw is fixed by screwing the fixing hole to the screw hole of the positioning piece, the magnet is fixed, so that the magnet does not fall off due to high-speed rotation, and since the magnet is covered and fixed by the wrapping piece, the magnetic force is not hindered. Thereby increasing the service life of the motor.

In the above-mentioned permanent magnet motor shaft magnet fixing device, the positioning portion of the wrapping sheet is U-shaped concave so as to be embedded in the gap between the magnets.

Please refer to both the first and second figures, which are perspective views of the present invention and a combined plan view. As shown, the present invention comprises a core body 1, a plurality of positioning pieces 2, a plurality of magnets 3, and a cover sheet 4. The axial center body 1 is provided with a groove 11 arranged at intervals on the circumference. The groove 11 is T-shaped, and a vertical protruding rib 12 is disposed on the outer edge of the groove 11. The positioning piece 2 is The width is equal to or slightly smaller than the recessed groove 11 and is provided with at least two screw holes 21; the cover sheet 4 is provided with spaced-apart positioning portions 41, and the positioning portions 41 are U-shaped concave portions. The positioning portions 41 are respectively provided with fixing holes 411; by the combination of the foregoing members, the positioning pieces 2 are respectively embedded in the slots 11 of the shaft body 1 and the magnets 3 are attached to the shaft body. The periphery of 1 is positioned by the protruding rib 12 to prevent the magnet 3 from being skewed, and the cover sheet 4 is wrapped around the outer edge of the magnet 3, and the fixing portion 41 is fixed by the screw 5. The hole 411 is locked to the screw hole 21 of the positioning piece 2, and the magnet 3 is tightly fixed so that the magnet 3 does not rotate at a high speed. And the falling off, and because the magnet is covered and fixed by the wrapping sheet, the magnetic force is not hindered, thereby improving the service life of the motor.

Please refer to the third figure, which is a partially enlarged perspective view of the combination of the present invention. Please cooperate with the first figure and the second figure. As shown in the figure, after the combination of the present invention, the positioning piece 2 is respectively embedded in the slot 11 of the shaft body 1, since the slot 11 is T-shaped. In order to facilitate the positioning of the positioning piece 2. The magnets 3 are respectively attached to the periphery of the shaft body 1 , and the cover sheet 4 is wrapped around the outer edge of the magnet 3 , and is fastened to the positioning piece 2 by the fixing hole 411 of the setting portion 41 by the screw 5 . Screw hole 21. However, since the positioning portion 41 of the cover sheet 4 is formed in a U-shaped recess, the positioning portion 41 can be fitted into the gap between the magnets 3, and the magnet 3 can be tightly bundled and fixed. In this way, the magnet 3 does not fall off due to high-speed rotation, and since the magnet is covered and fixed by the wrapping sheet, the magnetic force is not hindered, thereby increasing the service life of the motor.

Please refer to the fourth figure for a cross-sectional view of the present invention. Please cooperate with the first figure and the second figure. As shown in the figure, after the assembly of the present invention, the screw 5 is passed through the fixing hole 411 of the positioning portion 41 of the wrapping sheet 4, and is locked to the screw hole of the positioning piece 2. 21, the cover sheet 4 and the positioning piece 2 are tightly coupled, so that the protruding rib 12 provided on the shaft core body 1 is held by the positioning portion 41 of the cover sheet 4, and the magnet 3 can be pinned by the cover sheet 4. It will not be easy to loose.

The foregoing embodiments are merely illustrative of the preferred embodiments of the present invention, and are not intended to limit the scope of the invention.

In summary, the present invention comprises a shaft center body having a recessed groove, a positioning piece embedded in the recessed groove, and a covering piece coated on the magnet, thereby forming a permanent magnet motor shaft magnet fixing device, and the shaft center is The outer edge of the magnet is tightly coated so that it does not fall off due to high-speed rotation, thereby increasing the service life of the motor. For a practical design, it is an invention of novelty. If you apply for a patent in accordance with the law, you will be punished by the Bureau of Prosecution, and you will be granted a patent as soon as possible.

1‧‧‧Axis ontology

11‧‧‧Inlay

12‧‧‧ rib

2‧‧‧ Positioning film

21‧‧‧ screw holes

3‧‧‧ Magnet

4‧‧‧Wraps

41‧‧‧ Positioning Department

411‧‧‧Fixed holes

5‧‧‧ screws

The first figure is a perspective exploded view of the present invention.

The second drawing is a plan view of the combination of the present invention.

The third drawing is a partially enlarged perspective view of the combination of the present invention.

The fourth figure is a cross-sectional view of the present invention.

1‧‧‧Axis ontology

11‧‧‧Inlay

12‧‧‧ rib

2‧‧‧ Positioning film

3‧‧‧ Magnet

4‧‧‧Wraps

41‧‧‧ Positioning Department

5‧‧‧ screws

Claims (5)

A permanent magnet motor shaft magnet fixing device comprises: a shaft core body, which is provided with a groove arranged at intervals on the circumference; a plurality of positioning pieces are provided with at least two screw holes; the wrapping sheets are arranged at intervals The positioning portion is respectively provided with fixing holes in the positioning portions; the positioning pieces are respectively embedded in the slots of the shaft body, and the magnets are attached to the periphery of the shaft body to wrap the cover sheets The outer edge of the magnet is screwed into the fixing hole of the positioning portion, and is locked to the screw hole of the positioning piece, so that the magnet is tightly fixed, so that the magnet does not fall off due to high-speed rotation, and the magnet is covered by the package. The cover is fixed, so the magnetic force is not hindered, thereby increasing the service life of the motor. The permanent magnet motor shaft magnet fixing device according to claim 1, wherein the recessed groove provided in the shaft body has a T shape to facilitate the insertion of the positioning piece. The permanent magnet motor shaft magnet fixing device according to claim 1, wherein the outer edge of the slot of the shaft body is provided with a vertical protruding rib, so that when the magnet is attached to the periphery of the shaft body, It is possible to form a positioning by the ribs to prevent the magnet from being skewed. The permanent magnet motor shaft magnet fixing device according to claim 1, wherein the positioning piece has a width equal to or slightly smaller than the recessed groove. The permanent magnet motor shaft magnet fixing device according to claim 1, wherein the positioning portion of the wrapping sheet is formed in a U-shaped recess so as to be embedded in a gap between the magnets.