KR101101917B1 - Magnetic levitation conveyance device - Google Patents

Abstract

The magnetic levitation conveying apparatus according to an embodiment of the present invention is installed on a track fixed to the ground and on the track so as to reduce power consumption, and is mounted on the bogie and floats on the track and attached to the lower surface of the track. A vehicle side electromagnet fixed to the ground side electromagnet and the bogie and installed so as to face the ground side electromagnet, wherein the vehicle side electromagnet surrounds the core and a permanent magnet disposed to contact the protrusions and protrusions formed on the core; It includes, the ground-side electromagnet has a plurality of projections.

Conveying, permanent magnet, branch, track, magnetic levitation

Description

Magnetic levitation conveying device {MAGNETIC LEVITATION CONVEYANCE DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic levitation conveying apparatus, and more particularly, to a conveying apparatus for performing floating and conveying using a linear motor.

Conventional automated transport systems used to transport semiconductor wafers, PDP panels, or LCD panels mainly utilize conveyor systems such as belt conveyors and roller conveyor vibration conveyors. Such a system obtains rotational force by an electric motor and applies a deceleration system in the middle to convert rotational motion into linear motion to transfer raw materials and products.

However, these existing systems are limited in speed and regulation of the mechanism of the components and friction occurs at each component change depending on the application of the machinery, so noise, vibration and dust generation are inevitable. In order to prevent such noise, vibration, dust reduction and failure due to wear, periodic inspections of components, replacement of parts, and repairs must be performed periodically, leading to an increase in maintenance costs. In particular, if branching is performed while the product is loaded, the product may rotate or cross, and the product may be scratched by friction.

Magnetic levitation propulsion refers to the propulsion by floating to a certain height from the track using the electric magnetic force. The magnetic levitation conveying device includes a track and a bogie that floats and propels in a non-contact manner on the track.

The magnetic levitation system applies an attraction force or repulsion force by an electromagnet between the bogie and the track to propel the bogie away from the bogie. As such, the magnetic levitation system is propelled in a non-contact state with the track, so that the noise and vibration are low and high speed propulsion is possible.

The magnetic levitation method includes a suction method using the attractive force of the magnet and a repulsion type using the repulsive force of the magnet.

In addition, in the method of injury of magnetic levitation, there are a superconducting method and a phase conducting method according to the principle of the electromagnet. The superconducting method is applied to high speed trains because there is no electric resistance and strong magnetic force can be obtained, and the phase conduction method is applied to medium speed stop trains.

There are two types of repulsions: permanent magnet repulsions using repulsive force acting between permanent magnets of the same pole, and inductive repulsions that are caused by magnetic field repulsive force caused by induced current of ground coil induced by the movement of magnet attached to the vehicle. Equation does not need to control, suction has the advantage that the injury can be controlled by controlling the amount of current even at stop and low speed.

In particular, the induced repulsion formula using the superconducting magnet in the vehicle to obtain the flotation force is not sensitive to the change of the load and is suitable for the high speed, the cryogenic cooling technology is required to maintain the superconducting state, there is a disadvantage that the expensive installation cost is required.

The present invention has been made to solve the problems as described above, the object of the present invention is to use the magnetic force of the permanent magnet in the magnetic levitation conveying device as a floating force, to minimize the power consumption for the injury of the vehicle body, linear motor Promoting by using to compensate for the shortcomings in terms of friction, dust, noise and maintenance of the existing conveyor type conveying device, to maximize the efficiency of factory automation operation and improve cleanliness.

The magnetic levitation conveying apparatus according to an embodiment of the present invention is a track fixed on the ground and a trolley mounted on the track and floating on the track and fixed to the trolley and the ground side electromagnet attached to the lower surface of the track. And a vehicle side electromagnet installed to face the ground side electromagnet, wherein the vehicle side electromagnet includes a vehicle side coil surrounding the core and a permanent magnet disposed to contact the protrusions and protrusions formed on the core, and the ground side electromagnet Has a plurality of protrusions.

A feed coil may be installed on the track, and the pick-up unit having a pickup coil may be installed on the truck to face the feed cable, and the feed cable may be made of a litz cable. In addition, the pick-up unit may be formed with a groove into which the feed cable is inserted.

A bogie top plate may be installed on the bogie frame, and a loading plate may be installed through a damper module on the bogie top plate, and the damper module may include two dampers that are inclined in opposite directions with respect to the bogie top plate.

The track is installed between a track extending in one direction and a track extending in the other direction, and may include a branch connected to a track extending in one direction or a track extending in another direction according to the rotation. In addition, the branch portion may include a girder, a lower pillar supporting the girder, a driving portion for rotating the lower pillar, and a stopper having a protrusion inserted into the lower pillar to finely control the rotation of the circumferential pillar. .

As described above, the conveying apparatus according to the exemplary embodiment of the present invention may reduce the consumption of electric power to obtain a floating force by installing a permanent magnet in the vehicle-side electromagnet.

In addition, unlike the conveying system such as a conveyor, the linear motor is used to transfer the truck, so that the acceleration and deceleration and the constant speed operation by the inverter are possible, so that the product transfer can be made faster, thereby improving productivity.

In addition, since the trolley floats and transports with a hybrid magnetic levitation force using a permanent magnet and an electromagnet, there is no friction, and thus there is little noise, vibration, and dust. In addition, since the independent operation is possible in the balance unit, the whole system is not stopped when the balance is stopped. Thus, it is possible to repeatedly stop, operate, and operate the balance unit, thereby improving productivity.

Since the turntable method of branching is applied, the direction of the product can always be aligned at the time of branching, and there is no need for a device for rotating the product. As the product rotates together with the bogie on the bogie, damage can be prevented.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

1 is a cross-sectional view of the magnetic levitation conveying apparatus according to an embodiment of the present invention cut in the width direction, Figure 2 is a cross-sectional view taken along the line II-II in Figure 1, Figure 3 is an embodiment of the present invention It is a top view which shows the magnetic levitation conveying apparatus which concerns on this.

1 to 3, the magnetic levitation conveying apparatus 100 according to the present embodiment includes a trolley 110 and a track 120 through which the trolley 110 moves, and a loading plate installed on the trolley. 130).

The truck 110 according to the present embodiment is placed on the track 120 or propelled by rising from the track 120.

The track 120 is formed to extend in one direction and includes a pillar 123 formed on the upper surface and a pillar 121 disposed below the girder 123 to support the girder 123 from the ground. The bracket 127 is installed at the side end of the girder 123, and the ground side electromagnet 180 is disposed under the bracket 127.

The trolley 110 includes a trolley top plate 116 disposed above and supporting a trolley top plate 116 and a trolley frame 112 disposed below the trolley top plate 116, and the trolley frame 112 has an upper portion. And a projection 112a, a vertical plate 112b vertically extending toward the ground, and a lower protrusion 112c protruding inward from the lower end of the receiver plate 112b. The upper protrusion 112a and the lower protrusion 112c protrude toward the center of the track and are arranged in parallel, and the bogie frame 112 has a substantially 'c' shape.

Four bogie frames 112 are installed on the bogie top plate 116 to support the bogie top plate.

The bogie 110 is installed on the girder 123 so that the bracket 127 is inserted between the upper protrusion 112a and the lower protrusion 112c. Accordingly, the bracket 127 and the ground side electromagnet 180 are disposed between the upper protrusion 112a and the lower protrusion 112c of the trolley. The vehicle side electromagnet 140 is installed on the lower protrusion 112c, and the ground side electromagnet 180 and the vehicle side electromagnet 140 are disposed to face each other.

In the present embodiment, the ground side electromagnet 180 is installed above, and the vehicle side electromagnet 140 is installed below so that the ground side electromagnet and the vehicle side electromagnet are attracted to each other. However, the present invention is not limited thereto, and the magnetic levitation conveying apparatus according to the present embodiment may be made of a repulsive type.

The ground side electromagnet 180 is formed to extend in the longitudinal direction of the track 120, and includes a core 181 and the ground side coil 182 surrounding the core 181. A plurality of protrusions 181a are formed on a surface of the ground side electromagnet 180 facing the vehicle side electromagnet 140. In addition, the groove between the protrusions 181a of the ground side electromagnet 180 is provided with a ground side coil 182 surrounding the protrusion 181a.

The vehicle side electromagnets 140 are installed on the upper surface of the lower protrusion 112c, and include a vehicle side coil 145 installed to surround the outer circumference of the core 141 and the core 141. The core 141 has a structure in which a plurality of steel sheets installed on the lower protrusion 112c are stacked.

The core 141 has a structure in which a plurality of protrusions 141a are spaced apart from each other with a groove 141b interposed therebetween, and a permanent magnet 143 is installed on the protrusions 141a. At this time, the magnetization direction of the permanent magnet 143 installed on one side protrusion 141a and the permanent magnet 143 installed on the neighboring protrusion 141a is installed to be opposite. The vehicle side coil 145 is installed to surround the protrusion 141a and the permanent magnet 143 together. Since the vehicle side coil 145 is wound around the core 141 and the permanent magnet 143, the magnetic force of the permanent magnet is added to the magnetic force of the electromagnet, thereby reducing power consumption. In the magnetic levitation conveying device, the power consumption is very important because the conveyance truck is operated in a non-contact manner, so that the power supply is also performed in a non-contact inductive manner. Unlike the direct power supply, the induction power supply consumes a lot of power, and according to the present embodiment, power consumption may be minimized.

In addition, the ground-side electromagnet 180 is a magnetic force concentrated in the protruding portion attracts the adjacent vehicle-side electromagnet 140, thereby generating a suction force and a driving force. On the other hand, when the injury of the trolley 110 is stopped below the upper protrusion 112a, an auxiliary wheel 190 that is in contact with the bracket 127 is installed.

At the center of the girder 123, two feed cables 126 are formed to extend along the longitudinal direction of the track, and at the center of the lower surface of the trolley top plate 116, the pick-up unit 114 receives electric power from the feed cable 126. Is installed fixed. The feed cable 126 is made of a Litz cable, and a high frequency alternating current flows through the feed cable 126. When the feed cable 126 is made of a Litz cable as in this embodiment, the surface effect can be reduced to prevent waste of power.

The pickup unit 114 is disposed at the center of the upper plate plate 116, and a groove is formed in the pickup unit 114 so that the feed cable 126 can be partially inserted into the pickup unit 114. A pickup coil is obtained which obtains the induced current generated by 126. The current stored in the pickup coil is transferred to the vehicle side coil 145. As such, when the groove is formed in the pickup unit 114, the pickup coil and the power feeding cable may be in close contact with each other to more efficiently transmit power.

Accordingly, the trolley 110 can propel the injury and movement without the electrical connection. On the other hand, the loading plate 130 is installed on the upper plate of the trolley through the damper module 150, four damper module 150 is installed on the upper plate of the trolley 116. The damper module 150 is composed of two dampers installed inclined in the opposite direction with respect to the top plate 116, so that a pair of dampers are arranged in a substantially 'V' shape. At this time, the damper may be made of a hydraulic damper.

Thus, when the dampers are inclined in the opposite direction, the dampers can sufficiently withstand the vibrations and shocks acting in the lateral direction of the carrying plate. Since the semiconductor wafer, the LCD panel, and the PDP panel are very vulnerable to external shocks, when the damper module 150 is installed as in the present embodiment, the cargo loaded on the loading plate 130 may be protected.

4 is a plan view showing a branch of the track according to an embodiment of the present invention, Figure 5 is a schematic longitudinal cross-sectional view showing a branch of the track according to an embodiment of the present invention.

Referring to FIGS. 4 and 5, when the trolley proceeding to one side track 120 enters the branch section 160 requiring the change of direction, the branch section 160 is rotated and continues in another direction. ). To this end, the branch 160 includes a girder 162, a lower pillar 165 supporting the girder, a driving unit 161 for rotating the lower pillar 165, and a stopper 167 for finely controlling the rotation. . The driving unit 161 includes a motor and the like, and is connected to the lower pillar 165 to rotate the lower pillar 165. The stopper 167 has a protrusion inserted into the lower pillar 165, and when the lower pillar 165 is rotated to a set position, the stopper 167 is inserted into the lower pillar 165 so that the lower pillar 165 does not rotate any more. It plays a role. On the other hand, the lower pillar 165 may be freely rotated by being located in the outer case through the bearing 163.

As described above, when the branch unit 160 according to the present embodiment rotates, the trolley 110 may enter the track 120 'facing the other direction and may stably change the direction. In addition, the branch part 160 can be rotated precisely using the drive part 161 and the stopper 167. FIG. In addition, since the branch portion is redirected so that the traveling direction and the trajectory of the product are always in the same direction, it is possible to prevent the load from being damaged since the load does not move during the change of direction.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but many variations and modifications may be made without departing from the spirit and scope of the invention. And it goes without saying that they belong to the scope of the present invention.

1 is a cross-sectional view of the magnetic levitation conveying apparatus according to an embodiment of the present invention cut in the width direction.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.

3 is a plan view showing a magnetic levitation conveying apparatus according to an embodiment of the present invention.

Figure 4 is a plan view showing a branch of the track according to an embodiment of the present invention.

5 is a schematic longitudinal sectional view showing a branch of a track according to an embodiment of the present invention.

<Description of reference numerals for main parts of the drawings>

100: magnetic levitation conveying device 110: cart

112: balance frame 114: pickup section

116: bogie top 120: track

121: pillar 123: girder

126: feed cable 127: bracket

130: loading plate 140: vehicle-side electromagnet

141: core 143: permanent magnet

145: vehicle side coil 150: damper module

160: branch portion 161: driving portion

162: girder 163: bearing

165: lower pillar 167: stopper

180: ground side electromagnet 181: core

182: ground side coil 190: auxiliary wheel

Claims (8)

Fixed tracks against the ground; A trolley mounted on the track and floating on the track; A ground side electromagnet attached to the lower surface of the track; A vehicle side electromagnet fixed to the vehicle and installed to face the ground side electromagnet; Including, The vehicle-side electromagnet includes a core protruding toward the ground-side electromagnet, the core including a plurality of protrusions spaced apart in the longitudinal direction of the track and a permanent magnet disposed on and contacting an upper surface of the protrusion; And a vehicle side coil surrounding the permanent magnet and the protrusion together. And the ground-side electromagnet including a core having a plurality of protrusions protruding toward the vehicle-side electromagnet and spaced apart in the longitudinal direction of the track, and a ground-side coil surrounding the protrusion. The method according to claim 1, A magnetic levitation conveying apparatus, on which the feed coil is provided, and the pick-up portion in which the pick-up coil is built in the cart is opposed to the feed cable. The method of claim 2, The feed cable is a magnetic levitation carrier device consisting of a litz cable (litz cable). The method of claim 2, The magnetic levitation conveying apparatus, wherein the pick-up portion has a groove into which the feed cable is inserted. The method according to claim 1, A trolley top plate is installed on the trolley frame, and a loading plate is provided on the trolley top plate via a damper module. 6. The method of claim 5, The damper module is a magnetic levitation conveying device consisting of two dampers installed inclined in a V-shape with respect to the upper plate of the bogie. The method according to claim 1, The track is installed between the track continued in one direction and the track connected in the other direction, the magnetic levitation conveying device including a branch connected to the track continued in one direction or the track continued in the other direction according to the rotation. 8. The method of claim 7, The branch part is provided with a girder and a stopper disposed below the girder and having a lower pillar supporting the girder, a driving portion for rotating the lower pillar, and a protrusion inserted into the lower pillar to control the rotation of the lower pillar. Magnetic levitation conveying device comprising a.

Images