JP2008253108A - Drive guide device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drive guide device in which heat is more efficiently dissipated from heat dissipating fins in the guide device with the heat dissipating fins in order to dissipate the heat generated in a moving member using a linear motor as a drive source. <P>SOLUTION: The drive guide device includes a movable unit 100 which moves by being guided to rails 230 by the liner motor. In the drive guide device, the movable unit 100 includes: a moving member 140 in which a magnet field is generated by current-supply; a table 110 provided on the side opposite to a base 210 for fixing the rails 230 thereon across the moving member 140; and the heat dissipating fins 150 in order to dissipate the heat generated in the moving member 140 which is provided between the table 110 and the movable member 140, the heat dissipating fins 150 includes: first heat dissipating fins 151; and second heat dissipating fins 152 of which the height is lower than that of the first heat dissipating fins 151, and the second heat dissipating fins 152 are each disposed between the first dissipating fins 151. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a drive guide device including a heat radiation fin that radiates heat generated on the energization side of a linear motor.

  2. Description of the Related Art Conventionally, a drive guide apparatus including a moving unit that moves relative to a base on which a guide guide is provided is known. In addition, such a driving guide device using a linear motor as a driving source of the moving unit is known. Patent Document 1 discloses a configuration of a drive guide apparatus that uses a linear motor as a drive source.

  A drive guide device using a linear motor as a drive source includes a mover that generates a magnetic field when energized, a moving unit, a stator having a magnet in a portion of the base facing the mover, and the mover By being energized and generating a magnetic mutual force between the mover and the stator, the moving unit is guided by the guide guide and moves relative to the base.

  According to this configuration, since the moving unit moves in a state where the mover and the stator are not in contact with each other, there is almost no noise, vibration, etc. caused by the contact between the mover and the stator in the moving process of the moving unit. As a result, it is possible to reduce the noise and vibration of the drive guide device. Furthermore, since friction does not occur between the mover and the stator, the acceleration performance of the moving unit can be improved.

  FIG. 11 shows a schematic configuration of a conventional drive guide apparatus disclosed in Patent Document 1 using a linear motor as a drive source. As shown in FIG. 11, the drive guide apparatus includes a moving unit 100 including a table 110, a moving block 120, and a mover 140. The base 210 is provided with a stator 220.

  In addition, a rail 230 (guide guide) for guiding the movement of the moving unit 100 is fixed to the base 210, and the moving block 120 provided in the moving unit 100 is attached to the rail 230. At this time, the moving block 120 is generally attached to the rail 230 with a certain amount of preload applied via rolling elements such as balls and rollers. The act of applying the preload is performed so as not to cause play between the moving block 120 and the rail 230.

  Further, as shown in FIG. 11, the moving unit 100 is provided with a heat sink 130 between the mover 140 and the table 110, and a plurality of radiating fins 150 are formed on the heat sink 130 (FIG. 12). A heat insulating material 400 is provided between the heat sink 130 and the table 110.

  The heat dissipating fins 150 and the heat insulating material 400 are provided to prevent heat generated from the mover 140 from being transmitted to the table 110 when the mover 140 is energized to move the moving unit 100.

  That is, when the heat generated in the mover 140 when the mover 140 is energized is transmitted to the table 110, the table 110 undergoes thermal expansion and deforms. When the table 110 is thermally expanded with the moving block 120 attached to the rail 230, the table 110 is bent and the attached state between the moving block 120 and the rail 230 is changed.

  As a result, there is a problem that the play is generated between the moving block 120 and the rail 230 to generate vibration and noise, and the life of the drive guide device is shortened.

On the other hand, in the drive guide apparatus according to the conventional example, the heat insulating material 400 is provided between the table 110 and the mover 140 in order not to transfer the heat generated in the mover 140 to the table 110. Furthermore, a heat dissipating fin 150 is provided between the mover 140 and the table 110, and the heat generated in the mover 140 is dissipated by the heat dissipating fin 150.
JP 2004-88981 A

  However, when the mover 140 that generates a larger magnetic field is used, for example, for the purpose of increasing the thrust of the moving unit 100, the amount of heat generated in the mover 140 increases, and in the conventional configuration, the heat is reduced. The heat cannot be sufficiently insulated or radiated and heat is transferred to the table 110.

  As described above, when heat is transferred to the table 110 and the table 110 is thermally expanded, the mounting state of the moving block 120 and the rail 230 changes, and a backlash occurs between the moving block 120 and the rail 230, causing vibration. Noise is generated and the life of the drive guide device is shortened.

  As a solution to this, it is conceivable to increase the heat dissipation efficiency of the heat dissipating fins 150. In general, in order to increase the heat dissipating efficiency of the heat dissipating fins, it is necessary to increase the total surface area of the plurality of heat dissipating fins. Specifically, the distance between adjacent radiating fins is narrowed to increase the number of radiating fins installed per unit length, or the height of the radiating fins is increased to increase the surface area per radiating fin. , Etc. can be considered.

  However, if the distance between the heat sink fins is reduced or the height of the heat sink fins is increased, air convection may not easily occur between adjacent fins. Efficiency is reduced.

  That is, as shown in FIG. 12, the heat radiation fins 150 in the conventional example have the same height as the heat radiation fins 150. Therefore, in order to increase the heat radiation efficiency, the intervals between the adjacent heat radiation fins 150 are reduced or the heat radiation fins 150 are disposed. Even if the height of 150 is increased, not only the desired heat dissipation effect cannot be obtained, but conversely, the heat dissipation efficiency is lowered and the thermal expansion of the table 110 cannot be prevented.

  The present invention has been made in view of such a situation, and in a drive guide device that uses a linear motor as a drive source and includes a radiation fin for radiating heat generated by the mover, heat radiation from the radiation fin is performed. An object of the present invention is to provide a drive guide device that is more efficiently performed.

  In order to achieve the above object, according to the present invention, there is provided a drive guide device including a moving unit that is moved by being guided by a guide guide by a linear motor, wherein the moving unit generates a magnetic field when energized. And a table provided on the opposite side of the base on which the guide guide is fixed with respect to the mover, and a plurality of heat dissipating heat generated in the mover, provided between the table and the mover. In the drive guide device comprising a heat radiation fin, each of the plurality of heat radiation fins includes a plurality of first heat radiation fins and a plurality of second heat radiation fins having a height lower than that of the first heat radiation fin, A second radiating fin is disposed between the first radiating fin and the first radiating fin.

  According to this configuration, since the second heat radiation fin having a height lower than these is provided between the first heat radiation fin and the first heat radiation fin, the heat radiation surface of the heat radiation surface is increased by the first heat radiation fin having a higher height. While securing the area, the second radiating fin is installed between the first radiating fin and the first radiating fin, so that the first radiating fin is also radiating heat by the second radiating fin. It is possible to ensure a space in which air convects between the first heat dissipating fin and the first heat dissipating fin.

  Further, the first fins and the second fins may be arranged alternately.

  Moreover, it is also preferable that the said radiation fin is the structure where the normal line direction of the radiation surface of the said radiation fin is orthogonal to the moving direction of the said table.

  According to this configuration, air easily passes through the radiation fins as the table moves, so that heat radiation from the radiation fins is performed more effectively.

  Moreover, it is also preferable that the table has holes formed in portions facing the plurality of heat radiating fins.

  According to this configuration, by forming the hole in the portion of the table that faces the plurality of radiating fins, the heat radiated from the radiating fin can easily escape to the outside of the table through the hole.

  It is also preferable that the hole is a long hole that is long in a direction orthogonal to the moving direction of the table.

  According to this configuration, by increasing the hole area by using the hole shape as a long hole, the amount of heat escaping to the outside of the table through the hole is increased, and the shape of the long hole is orthogonal to the moving direction of the table. By making the shape long in the direction, it is possible to ensure rigidity compared to the case where the long hole is made long in the moving direction of the table.

  As described above, according to the present invention, the second heat radiation fin having a height lower than the first heat radiation fin is provided between the first heat radiation fin and the first heat radiation fin. The heat radiating fins secure the area of the heat radiating surface, and the second heat radiating fin is installed between the first heat radiating fin and the first heat radiating fin, so that heat is also radiated by the second heat radiating fin. However, it is possible to secure a space in which air convects between the first radiating fin and the first radiating fin. Therefore, in a drive guide device that uses a linear motor as a drive source and has a heat radiation fin for radiating heat generated by the mover, it is possible to provide a drive guide device in which heat radiation from the heat radiation fin is performed more efficiently. It becomes possible.

  The best mode for carrying out the present invention will be exemplarily described in detail below based on the embodiments with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. Absent.

  Hereinafter, with reference to FIGS. 1-10, the drive guide apparatus which concerns on embodiment of this invention is demonstrated.

[Configuration of mobile unit and base]
1 and 2 show a schematic configuration of the drive guide apparatus according to the present embodiment. FIG. 1 is a perspective view of a schematic configuration of the drive guide apparatus according to the present embodiment. FIG. 2 is a schematic configuration diagram in a cross section of the drive guide apparatus according to the present embodiment.

  As shown in FIGS. 1 and 2, the drive guide apparatus according to the present embodiment includes a moving unit 100 and a base 210 to which a rail 230 as a guide guide for guiding the moving direction of the moving unit 100 is fixed. Prepare.

  The moving unit 100 includes a mover 140 that generates a magnetic field when energized, a table 110, and a moving block 120.

  The mover 140 has an unillustrated electromagnetic core and electromagnetic coil. Further, a heat sink 130 provided with a plurality of heat radiation fins 150 is provided between the mover 140 and the table 110. Note that the configuration of the heat sink 130 with the fins will be described later.

  The mover 140 is provided on the lower surface of the heat sink 130, and a plurality of heat radiation fins 150 are provided on the upper surface of the heat sink 130. Further, the heat sink 130 is fixed to the table 110 with bolts or the like. In addition, moving blocks 120 are provided at both ends of the table 110 in the width direction.

  On the other hand, a pair of rails 230 are fixed to the base 210 in parallel to each other as a guide for guiding the movement of the moving block 120. In addition, the base 210 is provided with a stator 220 having a magnet or the like at a portion facing the mover 140. A gap is provided between the stator 220 and the mover 140.

  The moving unit 100 is configured to be movable along the rail 230 by attaching the moving block 120 to the rail 230. The configuration of the attachment part of the moving block 120 and the rail 230 will be described later.

  In the drive guide apparatus configured as described above, when the mover 140 is energized from a power source (not shown), the mover 140 generates a magnetic field. Then, the moving unit 100 provided with the mover 140 moves along the rail 230 by the magnetic interaction with the magnetic field formed by the stator 220.

  That is, in the drive guide apparatus in the present embodiment, the moving unit 100 is moved with respect to the base 210 by the linear motor configured by the mover 140 and the stator 220.

[Configuration of moving block and rail mounting part]
In the present embodiment, a rolling guide that allows the moving block 120 to move while being guided by the rail 230 by interposing rolling elements (balls, rollers, etc.) between the moving block 120 and the rail 230. It was set as the structure which has. Hereinafter, with reference to FIGS. 3-5, the structure of the attachment part of the moving block 120 and the rail 230 is demonstrated. Here, a case where a ball is used as an example of a rolling element will be described.

  As shown in FIG. 4, two rail rolling grooves 231 are formed on the left and right side surfaces of the rail 230 along the longitudinal direction as rolling element rolling surfaces. On the other hand, the moving block 120 is formed with an infinite circulation path including a load rolling groove 121 that forms a load rolling element rolling path facing the ball rolling groove 231.

  A plurality of balls 232 that roll and circulate between the ball rolling groove 231 and the load rolling groove 121 as the moving block 120 moves relative to the rail 230 are arranged and accommodated in the infinite circulation path. ing.

  As shown in FIG. 3, the moving block 120 includes a load rolling groove 121 and a moving block main body 120a having a ball return path parallel to the load rolling groove 121, and a pair of ends coupled to both ends of the moving block main body 120a. An end cap 120b. The end cap 120b connects the load rolling groove 121 and the ball return path.

  The load rolling groove 121 formed on the moving block 120 is formed to face each ball rolling groove 231 formed on the rail 230, and between the load rolling groove 121 and the ball rolling groove 231. There are a plurality of balls 232 interposed therebetween.

  Then, the plurality of balls 232 are sent to the ball return path through the direction changing path formed in the end cap 120b as the moving block 120 moves, and are led to the load rolling groove 121 again, and are infinitely circulated. Circulate the road.

  As shown in FIG. 5, the plurality of balls 232 are rotatably held by the holding member 235. The holding member 235 includes spacers 122 arranged alternately with balls 232 and a thin plate-like flexible belt 234 connecting the spacers 122.

  As shown in FIG. 4, seal members 125 and 126 are disposed between the upper surface of the rail 230 and the moving block 120 and between the side surface of the rail 230 and the moving block 120.

  The seal members 125 and 126 are provided to prevent leakage of the lubricant filled between the ball rolling groove 231 and the load rolling groove 121 to the outside or entry of dust from the outside.

  In the above description, the configuration of the rolling guide in which the rail 230 and the moving block 120 are relatively movable via a rolling element such as a ball (ball or roller) has been described. The configuration is not limited to this, and a sliding guide configuration may be employed.

  FIG. 8 is a diagram illustrating a schematic configuration example of a drive guide apparatus including a sliding type guide mechanism.

  As shown in FIG. 8, the sliding-type guide mechanism has a rail 230 having a rectangular cross section, and a movable block 120 that is mounted on the upper surface of the rail 230 so as to be able to move relative to the rail 230. A pair of left and right is provided on the base 210.

  The rail 230 and the moving block 120 are incorporated in a sliding guide, that is, slidably in contact with each other without a rolling element interposed therebetween.

[Configuration of heat dissipation fins]
6 and 7 are enlarged views of the attachment portion of the radiation fin 150 in the drive guide apparatus according to the present embodiment shown in FIGS.

  As shown in FIGS. 6 and 7, in the drive guide device configured as described above, when the mover 140 is energized and generates heat, the heat dissipating fins 150 are provided for radiating the generated heat. did.

  Specifically, a plurality of heat radiation fins 150 are provided on the upper surface of the heat sink 130. Moreover, in this Embodiment, the radiation fin 150 shall include the 1st radiation fin 151 and the 2nd radiation fin 152 from which height differs.

  The first radiating fin (higher fin) 151 and the second radiating fin (lower fin) 152 are alternately provided. Further, the heat radiating fins 150 are arranged in parallel with the moving direction of the moving unit 100. By doing so, the normal line direction of the heat radiating surface of the heat radiating fin 150 is configured to be orthogonal to the moving direction of the table 110.

  Further, the height of the first radiating fin 151 is increased as much as possible so that the surface area thereof is increased. On the other hand, in consideration of dimensional tolerances and the like, the upper surface is set to a height that does not contact the lower surface of the table 110.

  Next, the heat dissipation mechanism will be described. First, the heat generated in the mover 140 along with the driving of the linear motor is transmitted to the heat sink 130 with fins described above. For example, a heat sink with a radiation fin having a known configuration in which a heat pipe is disposed is used.

  The heat transmitted to the heat sink 130 is radiated from the heat radiation fins 150 provided on the heat sink 130. As shown in FIGS. 6 and 7, in the present embodiment, as the heat radiation fins 150, the first heat radiation fins 151 and the second heat radiation fins 152 having different heights are used. The second fin (lower fin) is provided between the two fins.

  In general, as a technique for increasing the heat radiation efficiency of the heat radiation fins, it is conceivable to increase the surface area of the heat radiation fins. In particular, in the case where a plurality of radiating fins are arranged in parallel, it is possible to increase the radiating efficiency by increasing the total surface area of the entire radiating fins. Specifically, it is conceivable to increase the surface area by increasing the size of each radiating fin, or to increase the number of radiating fins per unit length by narrowing the interval between the radiating fins arranged.

  However, if the surface area of the radiating fins is increased by increasing the height of each radiating fin as much as possible, or the distance between the radiating fins is decreased to increase the number of radiating fins per unit length, Air becomes difficult to convect in the space.

  Therefore, in the present embodiment, a second heat radiation fin 152 having a height lower than these is provided between the first heat radiation fin 151 and the first heat radiation fin 151, and the first heat radiation having a higher height. While securing the area of the heat radiation surface by the fin 151, the second heat radiation fin 152 is installed between the first heat radiation fin 151 and the first heat radiation fin 151. In addition, a space in which air convects between the first radiating fins 151 and the first radiating fins 151 is secured while radiating heat.

  As a result, it is possible to secure a space in which air can be convected between the radiation fins while increasing the number of radiation fins per unit length by narrowing the interval between the radiation fins, and it is possible to increase the radiation efficiency.

  Further, the heat sink 130 with the fins is fixed by the upper surface of the wall portion 170 provided on the heat sink 130 coming into contact with the lower surface of the table 110. As shown in FIG. 6, in the present embodiment, three wall portions 170 are provided, and the upper surface of each wall portion 170 is fixed to the lower surface of the table 110.

  In addition, both the first and second heat dissipating fins 151 and 152 are lower than the upper surface of the wall 170 so that both the first and second heat dissipating fins 151 and 152 have their upper surfaces. Is configured not to contact the lower surface of the table 110. The upper surface of the wall 170 is fixed to the lower surface of the table 110 with a bolt or the like.

  Further, in the present embodiment, heat is transmitted from the heat sink 130 to the table 110 through the wall portion 170 so that the table 110 can dissipate heat. With such a configuration, when heat cannot be radiated by the radiating fins 150, the heat that could not be radiated can be transmitted to the table 110 and radiated at the table 110. Can be increased. In the present embodiment, the surface of the heat sink 130 is subjected to black surface treatment in order to dissipate the heat of the heat sink 130 more effectively.

[Table structure]
As shown in FIG. 9, in the present embodiment, in order to further improve the heat radiation efficiency of the heat radiating fin 150, the hole 111 is formed in the portion of the table 110 facing the heat radiating fin 150.

  According to this configuration, by forming the hole 111 in the portion of the table 110 that faces the heat radiating fin 150, the heat radiated from the heat radiating fin 150 can easily escape to the outside of the table 110 through the hole 111. As a result, the amount of heat released from the heat radiating fins 150 increases. Further, since the hole 111 is formed in the table 110, the table 110 can be reduced in weight.

  In addition, by making the shape of the hole 111 a long hole, it is possible to suppress the uneven heat distribution in the width direction of the table 110.

  Here, in the drive guide device, in order to increase the thrust of the moving unit, the magnetic field must be increased. For this purpose, it is necessary to increase the number of coils or to increase the size of the coils.

  Therefore, at least one of the height dimension, the length dimension, and the width dimension must be increased. However, increasing the height dimension may limit the height of the moving unit 100 because it increases.

  Further, increasing the length dimension increases the length of the moving unit 100 in the moving direction, and thus the moving range of the moving unit 100 is narrowed accordingly.

  As described above, when the height dimension and the length dimension are limited, in order to increase the thrust of the moving unit 100, the width dimension of the table 110 must be increased.

  As a result, the dimension in the width direction of the mover 140 and the table 110 is increased. When the dimension in the width direction of the mover 140 and the table 110 increases, the amount of downward deflection with the moving block 120 of the table 110 as a fulcrum increases due to the magnetic attraction force of the mover 140 and the stator 220. It becomes a trend.

  In particular, when a long hole is provided in the table 110, if the shape of the long hole is made long in the moving direction of the table 110, the amount of bending of the table 110 becomes large.

However, by making the shape of the long hole long in the direction orthogonal to the moving direction of the table 110 as in the present embodiment, the shape of the long hole is made long in the moving direction of the table 110. The amount of bending of the table 110 can be reduced.

  However, when the heat radiation from the heat radiation fins 150 is sufficient, as shown in FIG. 10, the table 110 may not be provided with the hole 111. By not providing the hole 111, the rigidity of the table 110 can be increased.

  In the present embodiment, the surface of the table 110 is subjected to a black surface treatment in order to dissipate the heat transmitted to the table 110 more effectively.

In addition, for the conventional aluminum alloy (thermal expansion coefficient 19 to 23 × (10 ⁻⁶ / K)) and iron (thermal expansion coefficient 11 to 12 × (10 ⁻⁶ / K)) on the table 110, Nobinite (registered trademark) CD-5 (thermal expansion coefficient 11 to 12 × (10 ⁻⁶ / K)) manufactured by Enomoto Casting Co., Ltd. was used. According to this configuration, when the heat that cannot be radiated by the radiating fins 150 is transmitted to the table 110, the thermal expansion amount of the table 110 can be suppressed.

  However, the method of performing the black surface treatment on the surface of the table 110 described above is a method for effectively radiating heat at the table 110 when heat that cannot be radiated by the radiating fins 150 is transmitted to the table 110. Therefore, this method may not be used when the quality is sufficiently satisfied by the heat radiation from the heat radiation fins 150.

  As described above, according to the present embodiment, it is possible to increase the heat radiation efficiency of the heat radiating fins 150, and thus it is possible to provide a drive guide device in which heat radiation from the heat radiating fins 150 is performed more efficiently. . Further, when a heat insulating material is sandwiched between the mover 140 and the table 110 as in the prior art, the rigidity of the heat insulating material is generally low, so that the strength of the apparatus main body is insufficient. However, in the present embodiment, since the heat insulating material is not provided between the mover 140 and the table 110, the strength of the apparatus main body can be improved.

(Other embodiments)
In the above description, the first heat radiation fins 151 and the second heat radiation fins 152 are alternately arranged. However, a plurality of second heat radiation fins are provided between the first heat radiation fins 151 and the first heat radiation fins 151. It may be a configuration. Specifically, a configuration in which two second heat radiation fins 152 are provided between the first heat radiation fins 151 and the first heat radiation fins 151 is exemplified.

  In the above description, the heat radiation fin 150 includes two types of heat radiation fins (the first heat radiation fin 151 and the second heat radiation fin 152) having different heights, but the structure of the heat radiation fin 150 is limited to this. For example, in addition to the first radiating fin 151 and the second radiating fin 152, a configuration having a radiating fin having a height different from that of the first and second radiating fins may be used.

The perspective view of the drive guide apparatus which concerns on this Embodiment Front view of drive guide apparatus according to the present embodiment Mounting configuration diagram of guide guide and moving block in the present embodiment Mounting configuration diagram of guide guide and moving block in the present embodiment Schematic configuration diagram of a moving block in the present embodiment Front view of radiation fin in the present embodiment The perspective view of the radiation fin in this Embodiment Schematic configuration diagram of a driving guide device provided with a sliding guide mechanism The perspective view of the table in this Embodiment The perspective view of the drive guide apparatus which concerns on this Embodiment Schematic configuration diagram of a driving guide device according to a conventional example Schematic configuration diagram of radiating fin according to conventional example

Explanation of symbols

100 moving unit 110 table 111 hole 120 moving block 120a moving block main body 120b end cap 121 load rolling groove 122 spacer 125 seal member 126 seal member 130 heat sink 135 gap 136 screw hole 140 mover 150 heat radiation fin 151 first heat radiation Fin 152 Second radiation fin 170 Wall 210 Base 220 Stator 230 Rail (Guide guide)
231 Ball rolling groove 232 Ball 234 Belt 235 Holding member 400 Heat insulating material

Claims (5)

A drive guide device including a moving unit that is moved by being guided by a guide guide by a linear motor,
The mobile unit is
A mover that generates a magnetic field when energized;
A table provided on the opposite side of the base on which the guide guide is fixed with respect to the mover;
A plurality of heat dissipating fins provided between the table and the mover to dissipate heat generated by the mover;
In a drive guide device comprising:
In the plurality of heat radiation fins,
A first heat dissipating fin;
A second radiating fin having a lower height than the first radiating fin;
Is included multiple times,
A drive guide device, wherein a second radiation fin is disposed between the first radiation fin and the first radiation fin.   The drive guide apparatus according to claim 1, wherein the first heat radiation fins and the second heat radiation fins are alternately arranged. The radiating fin is
3. The drive guide device according to claim 1, wherein a normal direction of a heat radiation surface of the heat radiation fin is orthogonal to a moving direction of the table. In the table,
The drive guide apparatus according to any one of claims 1 to 3, wherein a hole is formed in a portion facing the plurality of radiation fins. The hole is
The drive guide apparatus according to claim 4, wherein the drive guide device is a long hole that is long in a direction orthogonal to a moving direction of the table.

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