JPH0512972Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention [Industrial application field] The present invention aims at attaching the N and S poles to the surface of a ring-shaped permanent magnet used in small motors, etc., in the direction of the center of the ring-shaped permanent magnet. The present invention relates to a magnetizing device, and particularly to a permanent magnet magnetizing device that continuously and automatically magnetizes a ring-shaped permanent magnet.

[Conventional technology]

The mainstream of ring-shaped permanent magnets (hereinafter referred to as magnets) used in motors, etc. is a radial magnetized product in which the magnetization direction is multipolar magnetized on the outer circumference side in the direction of the magnet's central axis and on the inner circumference side. However, in order to improve the magnetizing magnetic field strength during magnetization, the magnetization is performed on the outer diameter side when performing inner diameter magnetization, and on the inner diameter side when performing outer diameter magnetization. It is necessary to arrange a yoke made of soft magnetic material and having a high saturation magnetic flux density so as to form a closed magnetic circuit. However, with a magnetizing yoke in which the outer diameter side yoke and the inner diameter side yoke are connected and fixed, it is impossible due to the structure of the device to insert the magnet from one side, magnetize it, and then eject it from the other side. It was necessary to take out the magnet, which resulted in a decrease in work efficiency.

Therefore, when actually magnetizing, the inner yoke and the outer yoke are separated and the magnets are inserted and ejected manually. Additionally, a device is used in which the inner yoke and outer yoke are fixed, and an air cylinder or the like is used to insert and eject from the same direction, but this requires complicated magnet supply methods, electrical equipment, etc. It also had the disadvantage of being larger.

[The problem that the idea aims to solve]

The present invention has the following advantages in magnetizing a ring-shaped permanent magnet:
The above-mentioned problem can be removed without requiring much manpower, and the magnet can be attached to the magnetizing device from above using its own weight, and after radial magnetization, the magnet can be removed from the magnetizing device using its own weight. discharge to. An object of the present invention is to provide a permanent magnet magnetizing device that is small and can efficiently magnetize.

B. Structure of the invention [Means for solving the problem] In order to magnetize a ring-shaped permanent magnet in the center of the device,
A cylindrical air gap in which an outer magnetized yoke is provided on the outer circumference of the magnet and an inner magnetized yoke core is provided on the inner circumference of the magnet, and a ring-shaped permanent magnet is inserted between the outer circumference magnetized yoke and the inner magnetized yoke center core. A ring-shaped permanent magnet is dropped from the top of the magnetizing device through a chute at a position where the radial direction of the magnet is perpendicular, and is temporarily stopped in the cylindrical gap in the center of the device.
A ring-shaped permanent magnet is moved from the left and right sides of the magnet by a cylindrical pusher that holds the magnet passing through the gap between the outer magnetizing yoke and the inner magnetizing yoke center core. The magnet is held and moved, and the left and right pushers that hold the permanent magnet are used to move it to the magnetizing yoke section, move it to the ejection position after magnetization, and then eject the magnet from the magnetization device. This is a permanent magnet magnetization device configured to automatically magnetize.

That is, the present invention is a permanent magnet magnetizing device that magnetizes the outer circumference and inner circumference of a ring-shaped permanent magnet with multiple poles toward the center of the ring-shaped permanent magnet. a first pusher made of a cylindrical non-magnetic material that moves in the horizontal direction due to the reaction force of the first cam and the second spring, and the first spring of the second pusher; a second pusher made of a non-magnetic material with a cylindrical outer shape and a partially bored side surface, which moves in the horizontal direction by the reaction force of a second cam driven by a motor and a first spring; the second of
A magnetizing device formed by an outer circumferential magnetizing yoke disposed on the outer circumference of the second pusher, and an inner circumferential magnetizing yoke core disposed on the inner circumference of the second pusher facing the magnetic pole of the outer circumferential magnetizing yoke. , a ring-shaped permanent magnet placed between the first pusher and the second pusher is gripped by its own weight via the chute by the drive of the first cam and the reaction force of the first spring and the second spring. , magnetizing the permanent magnet at the magnetized position by driving the first cam and the second cam, and temporarily stopping the second pusher at the permanent magnet ejection stop position by operating the second cam; Magnetizing a permanent magnet, characterized in that the ring-shaped permanent magnet is received, magnetized, and ejected by moving the second pusher to the permanent magnet shoot stop position by driving the second cam. It is a device.

[Effect]

At the center of the magnetizing device, there is an outer magnetizing yoke that fits around the outer periphery of the ring-shaped permanent magnet, and an inner magnetizing yoke core that fits around the inner periphery of the ring-shaped permanent magnet. A cylindrical gap is provided between the core and the ring-shaped permanent magnet to be inserted, and a ring-shaped permanent magnet to be magnetized is provided in the gap between the outer magnetized yoke and the inner magnetized yoke center core. and non-magnetic cylindrical pushers are installed on both the left and right sides of the permanent magnet, and the left and right cylindrical non-magnetic pushers hold the ring-shaped permanent magnet by cams and springs that are linked to motors, and move, magnetize, move, and eject the magnet. The operation is automatically repeated.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the permanent magnet magnetizing device according to the present invention, in which a magnet 10 is conveyed by a parts feeder or the like and is passed by its own weight in the direction of arrow h through a vertically arranged chute 1. and falls to the permanent magnet chute stop position point a.
Due to the rotation of the first cam 13 driven by the motor, the fallen magnet 10 is moved between the first pusher 2, which is made of a non-magnetic material and has a cylindrical shape, and which is placed in the horizontal direction and is interlocked with the first cam 13. a second spring 6 and a first spring 4 connected to a pusher 2;
, the first pusher 2 and the second pusher 3 are pushed toward the second pusher 3 which is made of a non-magnetic material and placed horizontally in a cylindrical shape with a hollowed-out side surface at the center. The first pusher 2 moves in the horizontal direction of arrow b, which is the moving direction of the first pusher 2, while being held by the first pusher 2. At this time, the second cam 14 that drives the second pusher 3 is the first cam 13.
Although the second pusher 3 rotates on the same axis as the second cam 14, it is in an idle state and the second pusher 3 is not restrained by the movement of the second cam 14.

The inner diameter and outer diameter of the permanent magnet 10 that has moved in the direction of arrow b are the outer circumferential magnetized yoke 5 and the inner circumferential magnetized yoke center core 9.
When the magnet is inserted into the gap between 1 pusher 2 is the 1st cam 1
3 and the reaction force of the second spring 6, and the reaction force of the first spring 4, the second pusher 3 moves in the direction of arrow d while gripping the permanent magnet.

When the magnet 10 reaches the permanent magnet ejection stop position e while moving in the direction of the arrow d, the second cam 14 is activated and the second pusher 3 is temporarily stopped, but the first
As for the pusher 2, the operation of the first cam 13 continues,
The magnet 10 continues to move in the direction of the arrow d due to the reaction force of the first cam 13 and the second spring 6, and the magnet 10 is released from the first pusher 2 and the second pusher 3 and is ejected at the permanent magnet ejection stop position e. It falls under its own weight from the exit 12 in the direction of arrow f and is ejected from the permanent magnet magnetization device.

After this, the second pusher 3 moves to the second cam 14.
Due to the rotation of , and the reaction force of the first spring 4, the first pusher 2 moves in the direction of the arrow d, and when the first pusher 2 reaches the position of the permanent magnet receiving port g, the next permanent magnet in the chute 1 is moved. falls to the permanent magnet chute stop position a, and returns to the starting point of operation. Thereafter, the above-described series of operations according to the present invention are performed continuously, and the operations of insertion, magnetization, and ejection are repeated.

In the permanent magnet magnetizing device of the present invention, the outer diameter and inner diameter of the first pusher 2 and the second pusher 3 are made larger than the outer diameter and smaller than the inner diameter of the permanent magnet 10 to be magnetized. Outer circumference magnetized yoke 5
is a yoke equipped with multiple magnetizing coils to enable multi-pole magnetization, and the center core of the inner magnetizing yoke on the inner diameter side is the same number of magnetizing yokes as the outer circumferential magnetizing yoke on the outer circumferential side, or it is simply made of soft iron. It may be a cylindrical yoke consisting of. The second pusher 3 is made of a non-magnetic material, has a cylindrical shape, and the central part of the cylindrical side is bored out at three places, and the center core of the inner circumferential magnetizing yoke is exposed to the magnetizing magnetic field from the bored window to the outside. The conductor that makes up the wire is pulled out.

C. Effects of the invention [Effects of the invention] According to the invention, it is now possible to automatically magnetize the outer and inner surfaces of a ring-shaped permanent magnet, which previously had to be done manually. Since this operation can be performed by two cams and two springs connected to a motor, it is possible to make the device extremely compact, and it is also possible to automate the radial magnetization of a ring-shaped permanent magnet. Therefore, it has become possible to provide inexpensive ring-shaped permanent magnets.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a permanent magnet magnetizing device for magnetizing a ring-shaped permanent magnet according to the present invention. 1... Shoot, 2... First pusher, 3
...Second pusher, 4...First spring, 5...Outer magnetized yoke, 6...Second spring, 7...Linear bearing, 8...Cam drive motor, 9...Inner circumference Magnetizing yoke center core, 10...
Ring-shaped permanent magnet, 11... air gap, 12... discharge port, 13... first cam, 14... second cam, a... permanent magnet chute stop position, b, d,
f, h...Arrow, c...Magnetized position, e...Permanent magnet ejection stop position, g...Permanent magnet receiving port.

Claims (1)

[Scope of utility model registration request] A permanent magnet magnetizing device that performs multi-pole magnetization on the outer circumference and inner circumference of a ring-shaped permanent magnet in the direction of the center of the ring-shaped permanent magnet. a first pusher made of a cylindrical non-magnetic material that moves horizontally by the reaction force of the second spring and the first spring of the second pusher; a second pusher made of a non-magnetic material with a cylindrical outer shape and a partially bored side surface, which moves in the horizontal direction due to the reaction force of the second cam and the first spring; a magnetizing device formed by an outer circumferential magnetizing yoke disposed on the outer circumference of the pusher; and an inner circumferential magnetizing yoke center core disposed on the inner circumference of the second pusher facing the magnetic pole of the outer circumferential magnetizing yoke; A ring-shaped permanent magnet disposed between the first pusher and the second pusher via the chute due to its own weight is gripped by the drive of the first cam and the reaction force of the first spring and the second spring, By driving the first cam and the second cam, the permanent magnet is magnetized at the magnetized position, and the second pusher is temporarily stopped at the permanent magnet ejection stop position by the operation of the second cam. A permanent magnet mounting device characterized in that the ring-shaped permanent magnet is received, magnetized, and ejected by moving the second pusher to the permanent magnet shoot stop position by driving the second cam. Magnetic device.