KR20220134285A - A magnetic coupling - Google Patents

Abstract

The present invention relates to a magnetic coupling. According to the present invention, the magnetic coupling comprises: a first coupler; and a second coupler that faces the first coupler in a non-contacting manner and forms a pair. The second coupler rotates by receiving rotational power from the first coupler by a magnetic force.

Description

Magnetic coupling {A MAGNETIC COUPLING}

The present invention relates to a magnetic coupling, and more particularly, to a magnetic coupling configured to transmit power in a non-contact manner using attractive and repulsive force of a magnet to realize noise-free, dust-free and semi-permanent lifespan.

Couplings are installed in power transmission devices such as industrial machines and automation equipment, and are widely used as shaft joint members that interconnect the drive shaft and the driven shaft and transmit power between them at a constant speed.

Such couplings include gear couplings such as splines, diaphragm couplings, flexible couplings, and magnetic couplings.

In addition, the mechanical gear of the coupling has a problem of deterioration of durability performance due to noise generated by meshing between the gears, dust due to meshing between the gears, and the need to periodically refuel.

Therefore, as a technology to replace the mechanical gear, a magnetic coupling that transmits power in a non-contact manner using magnetic attraction and repulsion has recently been developed and used.

This magnetic coupling is a device that transmits power in a non-contact manner using magnets to LCD manufacturing facilities, semiconductor manufacturing facilities, pharmaceutical facilities, and food manufacturing facilities that require high cleanliness in preparation for contamination by dust, metal particles, and noise. is being used as

Accordingly, the magnetic coupling is a coupling method that transmits rotational torque by connecting the shafts that are physically separated from each other through magnetic force.

This allows the magnetic coupling to physically separate the two shafts completely, and is widely used in applications that require airtightness between the shafts.

In addition, the magnetic coupling is used to manufacture and use magnets of different shapes and dimensions to correspond to each power transmission device in order to correspond to various output specifications of the power transmission device.

As described above, each magnetic coupling must be manufactured according to the output specifications of the power transmission device, which has a problem in that the commonality of using a magnet is deteriorated.

In addition, since the conventional magnetic coupling is manufactured differently according to output specifications, it acts as a factor in increasing the manufacturing cost of the magnetic coupling.

In addition, the conventional magnetic coupling causes damage to the permanent magnet due to contact or collision of the magnet parts when the repulsive force between the magnet parts for non-contact rotation is lost during operation. following problems arise.

Accordingly, the magnet constituting the coupler constitutes a main magnet disposed in the circumferential direction of the coupler and a split magnet disposed on the center side of the main magnet, and in particular, the split magnet part is magnetized by a surrounding permanent magnet and is a magnetic material made of steel. It is configured to include, and the magnet part is configured to rotate in a state in which attractive and repulsive forces are properly applied, so that it is possible not only to prevent the collision between the magnet parts during operation, but also to prevent contact or collision due to the loss of repulsive force. The development of a magnetic coupler is required to prevent the permanent magnet from being damaged due to the iron core protruding from the center of the magnetic material.

[Patent Document] KR 10-2018-0036182 (published on April 09, 2018)

In order to solve the above problems, the present invention includes an external magnet having a cylindrical shape in which divided magnetic poles are alternately magnetically coupled to an N pole and an S pole and an internal magnet disposed inside the external magnet, and the internal magnet By having a core magnetic body made of steel that is magnetized and surrounded by An object of the present invention is to provide a magnetic coupling capable of preventing damage between internal magnets by a magnetic material disposed on the center side during contact or collision.

Magnetic coupling according to an embodiment of the present invention for achieving the above object is a first coupler; and a second coupler that faces the first coupler in a non-contact manner and forms a pair, wherein the second coupler receives rotational power from the first coupler by magnetic force and rotates.

In addition, the first coupler and the second coupler according to the present invention is characterized in that it includes a magnet portion to which a plurality of permanent magnets are magnetically coupled along the circumferential direction.

In addition, the magnet part according to the present invention has a trapezoidal cross-section or a sector-shaped divided poles having an outer long arc and an inner short arc are alternately magnetically coupled to N and S poles to form an external magnet having a cylindrical shape; an inner magnet in a cylindrical shape disposed in the center of the outer magnet so as to be spaced apart from the outer magnet by a predetermined interval, and disposed as an N pole and an S pole by crossing the inside of the cylinder and the outside of the cylinder; and a core magnetic material disposed in the center of the inner magnet and magnetized by the inner magnet.

In addition, the inner magnet according to the present invention is characterized in that the diameter and thickness are configured to be smaller than the diameter and thickness of the outer magnet.

In addition, the external magnet of the first coupler according to the present invention is characterized in that a magnetic pole different from that of the external magnet of the second coupler is opposed and an attractive force acts.

In addition, the inner magnet of the first coupler according to the present invention is configured to have the same arrangement of magnetic poles as the inner magnet of the second coupler, so that the core magnetic body of the first coupler and the second coupler is magnetized with the same magnetic pole do.

In addition, the first coupler and the second coupler according to the present invention includes a holder on which the magnet part is seated; a housing enclosing the magnet unit and having one end connected to the holder; and a drive shaft connected to the holder.

According to the magnetic coupling according to the present invention as described above, the outer magnet arranged in the circumferential direction of the coupler and the inner magnet arranged on the center side of the outer magnet are constituted, and in particular, the central portion of the inner magnet is magnetized by a permanent magnet and magnetic It is configured to include a core magnetic material made of steel with When a collision occurs, there is an effect to prevent damage between the magnet parts by the magnetic core made of steel.

In addition, by transmitting the rotational power in a non-contact manner, it is possible to transmit power even when the shaft is twisted, and it is possible to prevent the rotational power stop phenomenon due to coupling breakage, as well as to ensure noise-free, vibration-free and semi-permanent lifespan.

1 is a configuration diagram showing the overall configuration of a magnetic coupling according to the present invention.
2 is a view showing the configuration of a magnet unit according to the present invention.
3 is a cross-sectional view showing the configuration of the magnet unit according to the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. First, it should be noted that the same components or parts in the drawings are denoted by the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related known functions or configurations are omitted so as not to obscure the gist of the present invention.

1 is a configuration diagram showing the overall configuration of a magnetic coupling according to the present invention.

Magnetic coupling (magnetic coupling) (1) according to the present invention means a coupling connected using the magnetic force of a permanent magnet, in order to dynamically connect a pair of shafts to each other, a pair of shafts A first coupler 100 coupled to any one and having a plurality of permanent magnets provided along the circumferential direction, and a plurality of permanent magnets coupled to the other of the pair of shafts and generating a magnetic force in the permanent magnets It may include a second coupler 200 provided along the circumferential direction.

Accordingly, the magnetic coupling 1 has the same configuration as the first coupler 100 and the first coupler 100 as shown in FIG. can be configured.

The first coupler 100 according to the present invention is configured so that attractive and repulsive forces act appropriately on the second coupler 200 , so that rotational power can be transmitted to the second coupler 200 .

Accordingly, the first coupler 100 and the second coupler 200 may include magnet units 110 and 210 , holders 120.220 , housings 130 and 230 , and drive shafts 140 and 240 .

2 is a view showing the configuration of the magnet part according to the present invention, Figure 3 is a cross-sectional view showing the configuration of the magnet part according to the present invention.

The magnet parts 110 and 210 are configured by magnetizing a plurality of permanent magnets along the circumferential direction.

In addition, the magnet parts 110 and 210 according to the present invention are configured to rotate in a state in which attractive and repulsive forces are properly applied as shown in FIGS. In addition to being able to prevent it, it is configured to prevent damage between the magnet parts 110 and 210 by the magnetic body made of steel when a contact or collision occurs due to loss of repulsive force.

Accordingly, the magnet units 110 and 210 may include external magnets 111 and 211 , internal magnets 112 and 212 , and magnetic cores 114 and 214 .

The external magnets 111 and 211 have a trapezoidal cross section or a sectoral-shaped split pole having an outer long arc and an inner short arc are alternately magnetized to N and S poles to have a cylindrical shape. do.

Specifically, the external magnets 111 and 211 are composed of a combination of a plurality of divided magnetic poles, and N poles and S poles are alternately arranged, and the plurality of divided magnetic poles are preferably 6 poles, 8 poles, 10 poles, and 12 poles. , may be configured by selecting any one of 14 poles or 16 poles.

In addition, the external magnets 111 and 211 are the shape of the divided magnetic poles that are sectoral, trapezoidal, circular, rectangular, or polygonal in cross section, or have a long arc on the outside and a short arc on the inside. can

Preferably, the cross section is configured in a sectoral shape having a long arc on the outside and a short arc on the inside. may have the advantage of being adjustable.

In addition, commercially available ferromagnetic materials such as NdFeB sintered magnets, SmCo sintered magnets, and NdFeB bonded magnets may be used as the material of the magnet used as the split magnetic pole.

In addition, in the magnetizing method of the N and S poles of the divided magnetic poles constituting the external magnets 111 and 211, when the outer layer of any one of the divided magnetic poles is the N pole, the inner layer is the S pole, and the outer layer of the left and right divided magnetic poles is the S pole. , the inner layer has a structure in which the N poles are alternately magnetized.

In addition, the external magnets 111 and 211 are arranged so that magnetic poles different from those of the opposite external magnets 111 and 211 face each other, so that the attractive force between the external magnets 111 and 211 of the first coupler 100 and the second coupler 200 is designed to work.

Therefore, the external magnets 111 and 211 are formed between the external magnets 111 and 211 of the first coupler 100 and the second coupler 200 after the first coupler 100 and the second coupler 200 are properly positioned. A force is applied to the second coupler 200 in the direction of the rotation tog of the first coupler 100 by the applied attractive force, so that the second coupler 200 has a structure in which the rotational force in a desired direction can be transmitted.

In addition, the outer magnets 111 and 211 have a larger diameter and thickness than the inner magnets 112 and 212 , and are joined to the housings 130 and 230 on one side and connected to the holders 120 and 220 on the other side.

In addition, the outer magnets 111 and 211 may be arranged so that the inner magnets 112 and 212 are spaced apart from each other by a predetermined interval toward the center.

The inner magnets 112 and 212 have a cylindrical shape disposed in the center of the outer magnets 111 and 211, and are configured such that the inner side of the cylinder and the outer side of the cylinder cross each other to form an N pole and an S pole.

Specifically, the inner magnets 112 and 212 are formed in a double structure in which the cylindrical shape constituting the inner magnets 112 and 212 has a cylindrical inner side and a cylindrical outer side, and an N pole or an S pole can be disposed in each structure.

Accordingly, the inner magnets 112 and 212 may be configured as an S pole on the outside of the cylinder if the inner side of the cylinder is an N pole as shown.

At this time, the inner magnets 112 and 212 may magnetize the core magnetic materials 114 and 214 in contact with the inner magnets 112 and 212 to the N pole.

In addition, although not shown, the inner magnets 112 and 212 may have an S pole inside the cylinder and an N pole outside the cylinder.

In this case, the inner magnets 112 and 212 may magnetize the core magnetic materials 114 and 214 in contact with the inner magnets 112 and 212 to the S pole.

In addition, the inner magnets 112 and 212 are arranged such that the same magnetic poles as the opposite inner magnets 112 and 212 face each other, so that the core magnetic bodies 114 and 214 of the first coupler 100 and the second coupler 200 have the same magnetic poles. is magnetized to allow a repulsive force to act between the inner magnets 112 and 212 .

Accordingly, the inner magnets 112 and 212 generate a repulsive force, thereby preventing the first coupler 100 and the second coupler 200 from approaching each other.

In addition, the inner magnets 112 and 212 may be configured to be adjacent to the core magnetic body 114 and 214 on the inner circumferential surface.

In addition, the inner magnets 112 and 212 are configured to have a smaller diameter and thickness than the outer magnets 111 and 211, and are bonded to the extensions 114a and 214a of the core magnetic body 114 and 214 to be described later on one side, and the holders 120 and 220 on the other side. ) to be connected to.

Accordingly, the inner magnets 112 and 212 can prevent the permanent magnet from being damaged by the core magnetic body 114 and 214 made of steel even when a contact or collision occurs due to loss of repulsive force during operation.

In addition, as the inner magnets 112 and 212, commercially available ferromagnetic materials such as NdFeB sintered magnets, SmCo sintered magnets, and NdFeB bonded magnets may be used.

The core magnetic material 114 and 214 may be a magnetic material disposed on the center side of the cylindrical inner magnets 112 and 212 .

In addition, the core magnetic body 114 and 214 may be magnetized by the inner magnets 112 and 212 surrounding the core magnetic body 114 and 214 .

Accordingly, the core magnetic bodies 114 and 214 may be made of a magnetizable steel material.

Specifically, as shown in the drawings, when the inner magnets 112 and 212 have N poles on the inside of the cylinder and S poles on the outside of the cylinder, the core magnetic materials 114 and 214 are in contact with the core magnetic materials 114 and 214 with the inner magnets 112 and 212 as shown. ) can be magnetized to the N pole.

In addition, although the core magnetic materials 114 and 214 are not shown, when the inner magnets 112 and 212 have S poles on the inside of the cylinder and N poles on the outside of the cylinder, the core magnetic materials 114 and 214 in contact with the inner magnets 112 and 212 are not shown. can be magnetized to the S pole.

At this time, the magnetic core 114 and 214 of the first coupler 100 and the second coupler 200 as the inner magnets 112 and 212 of the second coupler 200 are disposed with the same magnetic pole. The magnetized magnetic poles of the core magnetic bodies 114 and 214 are also generated in the same manner, and a repulsive force acts on the opposite poles.

In addition, the core magnetic body 114, 214 is a portion in contact with the housing 130, 230, the inner magnet (112, 212) surrounding the core magnetic body (114, 214) to cover the upper end of the protruding portion (114a, 214a). can

Accordingly, the core magnetic body 114, 214 is formed to protrude to cover one side of the upper end of the inner magnetic pole of the inner magnet 112, 212 surrounding the core magnetic body 114, 214 on one side portion in contact with the housing 130, 230. Extension parts 114a and 214a. By including, even if a contact or collision between the first coupler 100 and the second coupler 200 due to the loss of repulsive force occurs, it is possible to prevent damage to the inner magnets 112 and 212 .

In addition, the magnetic cores 114 and 214 may have a cylindrical shape or a polygonal column shape in which one side portion and the other side portion have the same extension line.

In this case, the core magnetic bodies 114 and 214 may be configured not to include the extension parts 114a and 214a.

The first coupler 100 and the second coupler 200 according to the present invention surround the holders 120 and 220 on which the magnet parts 110 and 210 are seated, the magnet parts 110 and 210, and one end is connected to the holders 120 and 220. It may include a housing 130 and 230 that is used and drive shafts 140 and 240 connected to the holders 120 and 220 .

The holders 120 and 220 are portions on which the magnet parts 110 and 210 are seated, and may be preferably made of a material that improves the characteristics of the coupler by preventing magnetic leakage.

The housings 130 and 230 are formed to completely surround one side of the magnet parts 110 and 210 , and serve to protect and fix the magnet parts 110 and 210 .

Accordingly, the magnet parts 110 and 210 are disposed in a non-contact manner in which the housings 130 and 230 and the holders 120 and 220 are coupled to face each other in a non-contact manner, and the driving shafts 140 and 240 are mounted on each side thereof.

In addition, the housings 130 and 230 may be made of a non-magnetic material such as aluminum, SUS, or PVC.

The driving shafts 140 and 240 are connected to the holders 120 and 220 , and the driving shaft 240 mounted on the second coupler 200 rotates by receiving the rotational force of the first coupler 100 and the second coupler 200 . It may be a driven shaft.

According to the magnetic coupling according to the present invention as described above, the outer magnet arranged in the circumferential direction of the coupler and the inner magnet arranged on the center side of the outer magnet are constituted, and in particular, the central portion of the inner magnet is magnetized by a permanent magnet and magnetic It is configured to include a core magnetic material made of steel with When a collision occurs, it is possible to prevent damage between the magnet parts by the magnetic core made of steel.

In addition, by transmitting the rotational power in a non-contact manner, it is possible to transmit power even when the shaft is twisted, and it is possible to prevent the rotational power from stopping due to coupling breakage, as well as to ensure noise-free, vibration-free and semi-permanent lifespan.

The terms and words used in the present specification and claims described above should not be construed as being limited to conventional or dictionary meanings, and the present inventors have adequately defined the concept of terms to describe their invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined in

Accordingly, the configurations shown in the drawings and embodiments described in this specification are only one of the most preferred embodiments of the present invention, and do not represent all the technical spirit of the present invention, so they can be substituted at the time of the present application. It should be understood that there may be various equivalents and variations that exist.

1: Magnetic coupling
100: first coupler 200: second coupler
110, 210: magnet part 111, 211: external magnet part
112, 212: inner magnet 114, 214: core magnetic material
114a, 214a: extension 120, 220: holder
130, 230: housing 140, 240: drive shaft
200: second coupler

Claims (7)

a first coupler; and
Including; a second coupler paired with the first coupler and facing non-contact
The second coupler,
Magnetic coupling, characterized in that it rotates by receiving rotational power from the first coupler by magnetic force.
The method of claim 1,
The first coupler and the second coupler,
a magnet unit to which a plurality of permanent magnets are magnetically coupled along a circumferential direction;
Magnetic coupling comprising a.
3. The method of claim 2,
The magnet part,
an external magnet having a cylindrical shape in which the divided poles of a trapezoidal cross section or a sectoral shape having a long arc on the outside and a short arc on the inside are alternately magnetically coupled to the N and S poles;
an inner magnet in a cylindrical shape disposed in the center of the outer magnet so as to be spaced apart from the outer magnet by a predetermined interval, the inner side of the cylinder and the outer side of the cylinder intersect to form an N pole and an S pole; and
a core magnetic body disposed in the center of the inner magnet and magnetized by the inner magnet;
Magnetic coupling comprising a.
4. The method of claim 3,
The inner magnet is
A magnetic coupling, characterized in that the diameter and thickness are smaller than the diameter and thickness of the external magnet.
4. The method of claim 3,
The external magnet of the first coupler,
Magnetic coupling, characterized in that the magnetic pole different from the external magnet of the second coupler is opposed to the attractive force.
4. The method of claim 3,
The inner magnet of the first coupler,
The arrangement of the internal magnet and magnetic pole of the second coupler is the same,
Magnetic coupling, characterized in that the core magnetic body of the first coupler and the second coupler is magnetized with the same magnetic pole.
The method of claim 1,
The first coupler and the second coupler,
a holder on which the magnet part is seated;
a housing enclosing the magnet unit and having one end connected to the holder; and
a drive shaft connected to the holder;
Magnetic coupling comprising a.

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