JPH068344U - Magnetic levitation device - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a magnetic levitation device, and is particularly characterized in preventing damage to a permanent magnet provided on an electromagnet. [Structure] The magnetic levitation device according to the present invention comprises a permanent magnet (7a,
7b) a magnetic cover (11a, 11b) provided on the non-magnetic outer cover (12a, 12b) provided on the peripheral surface of the permanent magnet (7a, 7b) and the magnetic cover (11a, 11b) It consists of and.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic levitation device, and more particularly, to a new improvement for preventing damage to a permanent magnet provided on an electromagnet.

[0002]

[Prior art]

 There are various magnetic levitation devices of this type that have been used in the past, and a typical one of them will be described below. For example, the configuration disclosed in Japanese Patent Laid-Open No. 64-30406 shown in FIG. Can be disclosed. That is, the reference numeral 1 in FIG. 2 is a rail attached to a fixed portion 2 which is a ceiling, and is moved to the fixed portion 2 at a position below the rail 1 via a hanging means (not shown). An electromagnet 4 having a carriage 3 suspended freely is located.

Permanent magnets 7a and 7b having different polarities are provided on the pair of upper portions 6a and 6b of the yoke 6 having the exciting coil 5 of the electromagnet 4, and the electromagnet 4 and the permanent magnets 7a and 7b are provided. The magnetic levitation magnet 10 is constituted by the above. Therefore, in the above-mentioned configuration, the magnetic levitation magnet 10 causes the carrier truck 3 to levitate by the attraction force exerted on the rail 1, and the carrier truck 3 can be freely transported while being levitated from the rail 1. In FIG. 2, the linear motor structure for moving the carrier 3 is omitted.

[0004]

[Problems to be solved by the device]

 Since the conventional magnetic levitation device is configured as described above, there are the following problems. That is, since the permanent magnet provided on the yoke of the electromagnet was exposed, if the electromagnet was strongly attracted to the rail, the permanent magnet would directly collide with the rail, resulting in damage to the permanent magnet. The magnetic characteristics of the entire magnetic levitation device would be adversely affected.

The present invention has been made to solve the above problems, and in particular, it is an object of the present invention to provide a magnetic levitation device that prevents damage to a permanent magnet provided on an electromagnet. And

[0006]

[Means for Solving the Problems]

 In the magnetic levitation device according to the present invention, a magnetic levitation magnet that uses a permanent magnet and an electromagnet together is attached to a carrier truck, and the magnetic carrier is levitated by the attraction force exerted on the rail by the magnetic levitation magnet. The levitation device is configured to include a magnetic cover provided on the permanent magnet and a non-magnetic outer cover made of a non-magnetic material provided on the peripheral surfaces of the permanent magnet and the magnetic cover.

[0007]

[Action]

 In the magnetic levitation device according to the present invention, the magnetic levitation magnet is excited by exciting the electromagnet so that the attraction force exerted on the rail by the magnetic levitation magnet causes the carrier truck to levitate and the linear motor (not shown) to be energized. It is freely transported in a suspended state while maintaining a certain distance from the rail. Also, if the magnetic levitation magnet attracts too much force and the permanent magnet collides with the rail, the magnetic cover provided on the permanent magnet is only damaged, preventing damage to the permanent magnet. can do. Therefore, it is possible to always obtain a stable levitation of the carrier.

[0008]

【Example】

 Hereinafter, preferred embodiments of a magnetic levitation device according to the present invention will be described in detail with reference to the drawings. It should be noted that the same or equivalent parts as those of the conventional example are designated by the same reference numerals for description. FIG. 1 is a cross-sectional view showing a magnetic levitation device according to the present invention. In FIG. 1, reference numeral 1 is a rail attached to a fixed portion 2 which is a ceiling, and is movable to the fixed portion 2 at a position below the rail 1 via a hanging means (not shown). An electromagnet 4 having a carriage 3 suspended on it is located.

Permanent magnets 7 a and 7 b having different polarities are provided on the pair of upper portions 6 a and 6 b of the yoke 6 having the exciting coil 5 of the electromagnet 4, and on the permanent magnets 7 a and 7 b, respectively. Is provided with magnetic substance covers 11a and 11b made of a magnetic substance having the same planar shape as those of the permanent magnets 7a and 7b.

A pair of non-magnetic outer peripheral covers 12a, 12b made of a non-magnetic material are provided on the upper portions 6a, 6b of the yoke 6, and the respective non-magnetic outer peripheral covers 12a, 12b are used to remove the magnetic force The outer circumferences of the body covers 11a and 11b and the permanent magnets 7a and 7b are surrounded and protected.

Therefore, in the above-mentioned configuration, by exciting the electromagnet 4, the magnetic levitation magnet 10 causes the attraction force exerted on the rail 1 to levitate the carrier vehicle 3 and energize a linear motor (not shown). As a result, the magnetic levitation magnet 10 is freely conveyed in a suspended state while maintaining a constant distance from the rail 1.

Further, even when the attraction force of the magnetic levitation magnet 10 is too strong and the permanent magnets 7 a, 7 b collide with the rail 1, the magnetic body covers 11 a, 11 b provided on the permanent magnets 7 a, 7 b, respectively. It is possible to prevent the permanent magnets 7a and 7b from being damaged by the collision of 11b.

Further, since the permanent magnets 7a, 7b and the magnetic body covers 11a, 11b are provided with the non-magnetic outer peripheral covers 12a, 12b, the permanent magnets 7a, 7b are effectively prevented from coming off from the electromagnet 4.

[0014]

[Effect of device]

 Since the magnetic levitation device according to the present invention is configured as described above, the following effects can be obtained. That is, since the magnetic cover that is protected by the non-magnetic outer cover is provided on the yoke, even if the magnetic levitation magnet collides with the rail, the permanent magnet can be reliably prevented from being damaged. it can.

[Brief description of drawings]

FIG. 1 is a sectional view showing a magnetic levitation device according to the present invention.

FIG. 2 is a cross-sectional configuration diagram showing a conventional magnetic levitation device.

[Explanation of symbols]

 1 rail 3 carrier truck 4 electromagnet 7a, 7b permanent magnet 10 magnetic levitation magnet 11a, 11b magnetic material cover 12a, 12b non-magnetic outer peripheral cover

Claims (1)

[Scope of utility model registration request] 1. A magnetic levitation magnet (10), which is a combination of permanent magnets (7a, 7b) and an electromagnet (4), is attached to a carriage (3), and the magnetic levitation magnet (10) is mounted on a rail (1). In a magnetic levitation device that floats the carrier vehicle (3) by an exerted attractive force, a magnetic cover (11a, 11b) provided on the permanent magnets (7a, 7b), and the permanent magnets (7a, 7b) and a non-magnetic outer cover (12a, 12b) provided on the peripheral surface of the magnetic cover (11a, 11b) and made of a non-magnetic material.