JP2018157616A - Power generation system in linear motion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide technology for efficiently achieving continuous power generation with relative movement in a linear motion device.SOLUTION: In a power generation system, a linear motion device comprises a track member having a metallic surface section and a moving member. A rotary magnet section is arranged on the moving member so that a rotary axis of the rotary magnet section having a plurality of permanent magnets crosses a longitudinal direction of the track member at a prescribed angle, a part of a rotary peripheral face of the rotary magnet section faces the surface section and a distance between a part of the rotary peripheral face and the surface section becomes a prescribed distance for generating eddy current on the surface section by relative movement of the moving member to the track member. A coil member is disposed in proximity to the rotary magnet section rotating with the relative movement of the moving member to the track member, and power is generated by a change in magnetic flux passing the coil member with rotation of the rotary magnet section.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a power generation system that generates power by a relative movement in a linear motion device having a moving member that moves relative to a track member.

  Linear motion devices such as linear guides that are widely used in machine tools and conveyors generate vibrations when driven by actuators such as motors, or generate heat due to friction. These vibrations and temperatures affect the life of the linear motion device. Therefore, sensors (acceleration sensors, temperature sensors, etc.) that measure these parameters that affect the life in order to maintain the linear motion device are arranged at appropriate locations in the device, and the values are acquired. In general, in order to acquire parameters by these sensors and to transmit the acquired parameter values to an external processing device, it is necessary to supply power to the sensors and the transmission device. As an example, power is supplied by a wired power supply line.

  In addition, when power is supplied through the power supply line as described above, the power supply line is also displaced as the linear motion device is driven, and the power supply line may be loaded due to the displacement, and the power supply line may be disconnected. There is. Therefore, for example, as shown in Patent Document 1, a technique for supplying power to a sensor or the like in a linear motion device without using a wired power supply line such as a power supply line has been developed. In this technique, permanent magnets are arranged on the track member side of the linear motion device so that the magnetic poles on the surface side are alternately different, and a coil for power generation is arranged on the moving member side of the linear motion device. Then, when the moving member moves relatively, power generation is performed with a change in magnetic flux passing through the coil member, and the generated power is supplied to a sensor or the like in the moving member.

JP 2003-22492 A

  When the permanent magnet is arranged on the track member side of the linear motion device and the coil member is arranged on the moving member side as in the prior art, and the power generation is performed along with the movement of the moving member, the moving member performs relative movement. A permanent magnet must be arranged on the side of the track member in the range to be performed, and its configuration requires a lot of cost. Moreover, by arranging the permanent magnet on the raceway member side, dust such as metal scrap generated in a machine (for example, a machine tool or a conveying device) in which the linear motion device is installed is attracted to and adhered to the permanent magnet. This can cause a relative movement of the moving member.

  As described above, the linear motion device is configured such that the moving member relatively moves on the raceway member. Therefore, it is difficult to perform efficient power generation, that is, continuous power generation accompanying the relative movement in the related art. It is. Further, in order to effectively acquire various parameters in the linear motion device, the number of devices (sensors, etc.) that consume power is increased on the moving member side, and the operating time of the power consumption device is also increased. It tends to be long. In order to sufficiently cope with such a trend, more efficient power generation technology is required, but it is difficult to sufficiently cope with the conventional technology.

  The present invention has been made in view of the above-described problems, and in a linear motion apparatus having a moving member that moves relative to a track member, it is possible to efficiently generate power continuously with the relative movement. The purpose is to provide the technology.

  In the present invention, in order to solve the above-mentioned problems, a rotating magnet portion configured to be rotatable in accordance with the relative movement of the moving member is disposed on the moving member side of the linear motion device, and a magnetic flux change caused by the rotation is used. Thus, a configuration in which power is generated by the coil member is adopted. Thereby, it becomes possible to generate electric power without arranging a permanent magnet on the raceway member side, and the occurrence of problems as in the prior art can be suppressed.

  More specifically, the present invention is arranged such that a raceway member extending along the longitudinal direction and having a metal surface portion is disposed to face the raceway member via a plurality of rolling elements, and the raceway member A power generation system in a linear motion device having a moving member relatively movable along the longitudinal direction, wherein the linear motion device and a rotating magnet portion on which a plurality of permanent magnets are rotatably supported The rotating magnet portion in which different magnetic poles are alternately formed on the rotating circumferential surface of the rotating magnet portion and the rotation axis of the rotating magnet portion intersect at a predetermined angle with respect to the longitudinal direction of the track member. In addition, a part of the rotating circumferential surface of the rotating magnet part faces the surface part, and the distance between the part of the rotating circumferential surface and the surface part is determined by relative movement of the moving member with respect to the track member. The rotating magnets are arranged so as to have a predetermined distance for generating eddy currents on the surface portion. And a coil member disposed in the vicinity of the rotating magnet unit that rotates as the moving member moves relative to the track member, and the rotating magnet unit rotates. And a power generation unit that generates electric power by changing a magnetic flux passing through the coil member.

  The linear motion device to which the power generation system of the present invention is applied has a track member and a moving member, and the track member is provided with a metal surface portion. Moreover, in the said electric power generation system, the rotating magnet part is arrange | positioned by the arrangement | positioning part at the moving member. The rotating magnet portion is configured such that a plurality of permanent magnets are rotatably supported on the rotating circumferential surface, which is a surface formed in the circumferential direction in a state where the rotating magnet portion is rotated by the shaft support. Are alternately formed with different magnetic poles. By arrange | positioning such a rotary magnet part by an arrangement | positioning part, a rotary magnet part will be set | placed by the predetermined | prescribed relative relationship with respect to a track member.

  And the said predetermined relative relationship implement | achieves rotation of a rotating magnet part with the magnetic field by the eddy current while a eddy current is formed in the surface part by the magnetic flux from a rotating magnet part with the relative movement of a moving member. It is a relationship. Specifically, as described above, the relationship is such that the rotation axis of the rotating magnet section intersects the longitudinal direction of the track member at a predetermined angle, and a part of the rotating circumferential surface and the surface portion facing it. Is a predetermined distance for generating an eddy current in the surface portion by relative movement of the moving member. The predetermined angle may be an intersecting angle other than an angle at which the rotation axis of the rotating magnet portion is parallel to the longitudinal direction of the track member, and is preferably an angle orthogonal to the longitudinal direction of the track member.

  Thus, when the moving member is moved relative to the track member by arranging the rotating magnet portion in a non-contact state with respect to the surface portion by the arranging portion, an eddy current is generated on the metal surface portion. Then, the moving member performs relative movement, so that the magnetic force (repulsive force) due to the eddy current generates a moment for rotating the rotating magnet portion. And if a rotating magnet part rotates, the magnetic flux by the several permanent magnet which it will have will fluctuate | variate. As a result, the magnetic flux passing through the coil member disposed in the vicinity of the rotating magnet unit varies, and the power generation is performed in the power generation unit having the coil member due to the variation. Thus, the electric power generated by the power generation unit can be supplied to a device (such as a sensor) that is mounted on the moving member and operates with various supply electric power.

In order to generate an eddy current in the surface portion, the surface portion needs to be made of metal, but the surface portion may be made of a nonmagnetic metal or a magnetic metal. In general, when the surface is made of a magnetic metal, the magnetic force (repulsive force) due to eddy currents compared to a nonmagnetic material
There is a possibility that the attractive force becomes larger than that and the smooth rotation of the rotating magnet portion is obstructed. Therefore, the surface portion is preferably made of a nonmagnetic metal.

  In this way, the rotating magnet portion is arranged on the moving member side so that the rotating magnet portion rotates with the relative movement of the moving member with respect to the track member, so that continuous power generation is performed with the relative movement. Can be done. At this time, since the rotating magnet portion is in a non-contact state with respect to the track member, there is no fear of the rotating magnet portion being worn or damaged. In addition, as long as the moving member continues relative movement, the rotation of the rotating magnet unit is continued, so that the power generation capacity is relatively large and the number of devices that are power supply destinations is increased, or The operating time can be extended.

  In a linear motion device having a track member and a moving member, it is possible to efficiently generate power continuously with relative movement of the moving member.

It is a 1st figure which shows schematic structure of the electric power generation system in the linear guide which is a linear motion apparatus. It is a figure which shows schematic structure of the electric power generation module mounted in the electric power generation system shown in FIG. It is a figure which shows the correlation of the electric power generation module shown in FIG. 2, and a track member. It is a figure which shows transition of the electric power generated by the electric power generation system in a linear guide. It is a 2nd figure which shows schematic structure of the electric power generation system in a linear guide. It is the figure which visualized the power generation module in the power generation system shown in FIG. It is a figure which shows schematic structure of the electric power generation module mounted in the electric power generation system shown in FIG. It is a figure which shows the correlation with the electric power generation module shown in FIG. 7, and a track member.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The dimensions, materials, shapes, relative arrangements, and the like of the components described in the present embodiment are not intended to limit the technical scope of the invention to those unless otherwise specified.

  FIG. 1 is a perspective view showing an embodiment of a power generation system in a linear guide 1 which is one of rolling guide devices. The linear guide 1 corresponds to the linear motion device of the present invention, and is assembled in a channel shape to the track rail 3 via a plurality of balls as a plurality of rolling elements and a track rail 3 formed in a straight line. And a moving block 2 as a moving member having an infinite circulation path for the ball, and the ball circulates in the infinite circulation path of the moving block 2 so that the moving block 2 is moved on the track rail 3 in the longitudinal direction. It is designed to move relative. The track rail 3 is made of metal.

The track rail 3 is formed in a substantially rectangular cross section. Further, the track rail 3 has a rail body 30, and as shown in FIG. 5 to be described later, the bolt mounting holes 32 are arranged at predetermined intervals along the longitudinal center axis of the upper surface 33 from the upper surface 33 of the rail body 30. Is formed. The track rail 3 can be fixed to a fixing member 35 such as a bed or a column by fastening a steel fixing bolt to the bolt mounting hole 32 (see FIG. 5). In the first embodiment, a metal cover member 30 a extending in the longitudinal direction of the track rail 3 so as to hide the bolt mounting hole 32 is disposed on the upper surface 33 of the track rail 3. The cover member 30a is made of a non-magnetic metal (for example, aluminum). When the cover member 30a is thus provided, the cover member 30a and the track rail 3 correspond to the track member of the present invention.
Further, on the left and right side surfaces of the track rail 3 that do not interfere with the bolt mounting holes 32, two ball rolling surfaces 31 on which the balls roll are formed along the longitudinal direction, respectively. A total of four ball rolling surfaces 31 are formed. In addition, in the track rail 3 according to the present embodiment, four ball rolling surfaces 31 are formed. The number and arrangement of the ball rolling surfaces 31 depend on the application of the linear guide 1 and the magnitude of the load load. The settings can be changed as appropriate.

  The moving block 2 includes a block main body 4 having a mounting surface 41 to which a movable body such as a table is fixed, and a pair of lids attached to both end portions 41a and 41b in the relative movement direction of the block main body 4. As an end plate 5. The end plate 5 is provided with a seal member (not shown). The seal member seals the gap between the end plate 5 and the upper surface 33 of the track rail 3, and foreign matters such as dust attached to the track rail 3 move. The entry into the block 2 is prevented. Further, when the linear guide 1 is used inside a machine tool or the like, the track rail 3 may be exposed to a coolant containing cutting waste such as iron pieces, and such cutting waste or the like may be used as foreign matter in the moving block 2. The seal member prevents entry into the interior.

  Here, when the linear guide 1 is used over a long period of time, foreign matter easily enters the moving block 2 due to deterioration of the seal member over time. If a foreign object enters the inside of the moving block 2, it influences the linear motion and tends to generate vibration. Therefore, before the abnormality of the linear guide 1 comes to the surface, the operation state of the moving block 2 is grasped based on the operation of the linear guide 1, particularly the operation of the moving block 2, and the maintenance of the linear guide 1 is notified to the user. Is preferred. Therefore, the linear guide 1 is subjected to vibration at the time of relative movement of the moving block 2 on the outer side of the end plate 5 provided on the end portion 41a side among the end plates 5 provided on both end portions of the block body 4. A vibration detection device 10 for detection is attached. Specifically, the vibration detection device 10 includes an acceleration sensor 11 for detecting the vibration of the moving block 2, and the acceleration data detected there is an information processing device outside the linear guide 1 by the wireless module 14. 100 is transmitted wirelessly. In addition to the acceleration sensor 11 for vibration detection, another sensor that detects a desired parameter (for example, temperature or the like) may be provided in the vibration detection device 10. Using the acceleration data transmitted in this way, the information processing apparatus 100 executes a diagnostic process for diagnosing whether or not abnormal vibration has occurred in the moving block 2 of the linear guide 1, and displays the diagnosis result. Based on this, the user can be notified of the maintenance of the linear guide 1. Further, by using the wireless module 14, it is not necessary to use a transmission cable to transmit acceleration data to the information processing apparatus 100, and there is no need to worry about the disconnection.

  On the other hand, in order to use an acceleration sensor or a wireless module in order to detect and acquire parameters regarding the operation state of the moving block 2 in this way, it is necessary to supply electric power for operating them. In particular, in order to periodically detect and acquire the state of the moving block 2, it is required to supply the operating power stably and continuously. Regarding power supply, a secondary battery can be mounted on the vibration detection device 10, but in that case, a space for arranging the secondary battery is required, and the moving block 2 is enlarged, and the capacity of the secondary battery is increased. However, it is necessary to replace them, and it cannot be said that the convenience for the user is high. Moreover, although it is possible to supply electric power from an external power supply via a power cable, in that case, there is still concern about disconnection of the power cable due to relative movement of the moving block 2.

Therefore, in the present embodiment, the vibration detection device 10 includes a power generation module 20 that generates power necessary for driving the acceleration sensor 11 and the wireless module 14, and a predetermined electric power for the power generated by the power generation module 20. A processing circuit 12 that performs processing related to rectification and boosting, and a power storage device (capacitor) 13 that stores electric power after being processed by the processing circuit 12. The power stored in the power storage device 13 is controlled to be supplied to the acceleration sensor 11 and the wireless module 14 by a control device (not shown). The power generation module 20, the acceleration sensor 11, the processing circuit 12, the power storage device 13, the wireless module 14, and a cable that electrically connects them are arranged inside the device body 10a of the vibration detection device 10 for protection. Has been.

  Here, the power generation module 20 will be described with reference to FIGS. 2 and 3. FIG. 2 is a diagram showing a schematic configuration of the power generation module 20, and FIG. 3 is a diagram for explaining a correlation of the power generation module 20 with respect to the configuration on the track rail 3 side. In the power generation module 20, six fan-shaped permanent magnets 21 having a cross section are arranged on the surface side of the cylindrical base member 22, and a rotating shaft 23 is fitted inside the base member 22. The rotating shaft 23 is rotatably attached to the device main body 10a of the vibration detecting device 10. Accordingly, the six permanent magnets 21 are disposed so as to be rotatable integrally with the rotation shaft 23 as a center, and a substantially continuous rotating circumferential surface 200 is formed in the circumferential direction of the rotation of the six permanent magnets 21. (See FIG. 3 (a)). Further, the magnetic characteristics of the permanent magnets 21 are set so that different magnetic poles are alternately arranged on the surface in the rotational circumferential direction of each of the six permanent magnets 21. As described above, the magnet rotating plate 20A having a rotatable configuration by the rotating shaft 23, the base member 22, and the six permanent magnets 21 corresponds to the rotating magnet portion of the present invention.

  In the power generation module 20, a coil is formed so as to surround the magnet plate, specifically, so as to wrap the magnet rotating plate 20A inside even when the magnet rotating plate 20A is rotating. A member 25 is arranged. That is, the magnet rotation plate 20 </ b> A is disposed inside the coil member 25. Further, the coil member 25 is fixed to the device main body 10 a of the vibration detection device 10 via the fixed frame 24. Therefore, if the magnet rotation plate 20A rotates about the rotation shaft 23, the magnetic flux generated by the permanent magnet 21 penetrating the coil member 25 is changed, so that a current is generated in the coil member 25 and power generation is performed. Therefore, the fixed frame 24 and the coil member 25 correspond to the power generation unit of the present invention.

  Here, the rotating shaft 23, the base member 22, and the magnet rotating plate 20A including the six permanent magnets 21 are attached to the apparatus main body 10a so as to be rotatable about the rotating shaft 23 as a central axis. Accordingly, the correlation of the magnet rotation plate 20A with respect to the configuration on the track rail 3 side at that time is determined so that the magnet rotation plate 20A is continuously rotated by the magnetic force generated between the magnet rotation plate 20A and the track rail 3 side.

  The correlation will be described with reference to FIG. The upper part (a) of FIG. 3 shows the relative positional relationship between the magnet rotating plate 20A and the configuration on the track rail 3 side when the magnet rotating plate 20A is viewed from the side of the vibration detecting device 10. Yes. In FIG. 3A, the left-right direction of the drawing corresponds to the longitudinal direction of the track rail 3 (the direction of the dashed arrow in the figure). As shown in the figure, six rotary peripheral surfaces 200 are formed on the surface of the permanent magnet 21, and in the same figure, the lowest point of the rotary peripheral surface 200 faces the cover member 30a on the track rail 3 side. The distance between the lowest point and the cover member 30a is a predetermined distance Δh. Also, the lower part (b) of FIG. 3 shows the relative positional relationship between the magnet rotating plate 20A and the configuration on the track rail 3 side when the magnet rotating plate 20A is viewed from above the vibration detecting device 10. ing. In FIG. 3B, the vertical direction of the drawing corresponds to the longitudinal direction of the track rail 3 (the direction of the broken arrow in the figure). Further, the axis of the rotating shaft 23 is represented by a one-dot chain line in the drawing, and the extending direction of the axis is correlated with the longitudinal direction of the track rail 3.

When the correlation of the magnet rotating plate 20A with respect to the configuration on the track rail 3 side is thus determined, the moving block 2 moves relative to the track rail 3 (in FIG. 3, the magnet rotating plate 20A is moved to the track rail 3). And the movement of the magnetic flux from the permanent magnet 21 of the magnet rotating plate 20A on the surface of the cover member 30a near the magnet rotating plate 20A on the track rail 3 side. Eddy current is generated. Further, the magnetic force generated by the eddy current causes the magnetic force to act on the permanent magnet 21 included in the magnet rotating plate 20A, and a moment for rotating the magnet rotating plate 20A about the rotating shaft 23 is generated. This moment is continuously generated by the relative movement of the moving block 2. As a result, when the moving block 2 moves relative to the track rail 3, the magnet rotating plate 20A is rotated via the eddy current on the cover member 30a (in FIGS. 3A and 3B). The direction of rotation is indicated by a white arrow).

  The eddy current generated on the cover member 30a changes depending on the predetermined distance Δh. Accordingly, in consideration of the magnetic force of the permanent magnet 21, the predetermined distance Δh is determined so that a moment that causes continuous rotation is suitably applied to the magnet rotation plate 20 </ b> A. That is, if the predetermined distance Δh is too long, the eddy current generated on the cover member 30a becomes weak, and it becomes difficult to generate a sufficient moment to rotate the magnet rotating plate 20A. If the predetermined distance Δh is too short, the eddy current generated on the cover member 30a becomes strong, but the magnetic force (attraction force) acting between the magnet rotating plate 20A and the cover member becomes excessive, and the magnet rotating plate 20A The rotation will be obstructed. In the present embodiment, since the cover member 30a is made of a nonmagnetic metal, the magnetic force (attraction force) acting between the magnet rotating plate 20A and the cover member is unlikely to increase. As a result, it is expected that a state in which the magnetic force becomes an obstruction factor and obstructs the rotation of the magnet rotation plate 20A can be avoided.

  Further, as shown in FIG. 3B, there is a correlation in which the extending direction of the axis of the rotary shaft 23 and the longitudinal direction of the track rail 3 are orthogonal to each other. As a result, when the moving block 2 is moved relative to the track rail 3, the magnetic force generated by the eddy current efficiently acts as the rotating moment of the magnet rotating plate 20A.

  As described above, the relative arrangement relationship of the magnet rotation plate 20A with respect to the track rail 3 side enables the rotation of the magnet rotation plate 20A accompanying the relative movement of the moving block 2 to be efficiently and smoothly continued. Become. When the magnet rotation plate 20A rotates, the coil member 25 generates power as described above. Here, the upper part (a) of FIG. 4 shows the voltage transition of the electric power generated by the coil member 25 when the moving block 2 moves straight in one longitudinal direction of the track rail 3. In this case, since the magnet rotation plate 20A continues to rotate in one direction, FIG. 4A shows the transition of the AC voltage according to the rotation speed. In the lower part (b) of FIG. 4, the voltage transition after the rectification process and the boosting process are performed on the AC voltage by the processing circuit 12 is shown. The voltage transition is a DC voltage transition after the rectification process, and the power after the process is stored in the power storage device 13. Note that when the power storage device 13 has already been stored to the maximum extent, the newly generated power is not applied to the power storage device 13 and is appropriately consumed by a predetermined resistance circuit in the processing circuit 12.

  According to the power generation module 20 configured in this way, efficient continuous power generation is performed according to the relative movement of the moving block 2 with respect to the track rail 3, and the generated power is transmitted to the acceleration sensor 11 in the vibration detection device 10. Or as operating power for the wireless module 14. As a result, it is possible to suitably detect acceleration data that is a parameter relating to vibration of the moving block 2 and transmit it to the information processing apparatus 100 wirelessly in a timely manner. Thereby, the information processing for the maintenance of the linear guide 1 in the information processing apparatus 100 can be suitably realized, and it is expected to greatly contribute to the efficiency of the user's maintenance work. Further, since the power generation module 20 generates power in a non-contact state with respect to the track rail 3, wear or damage of the power generation module 20 accompanying power generation can be avoided.

  In this embodiment, an eddy current is generated on the cover member 30a on the track rail 3 side. As shown in FIG. 5 to be described later, since the bolt mounting hole 32 is opened on the upper surface 33 of the rail body 30, if an attempt is made to generate eddy current on the surface of the upper surface 33 without arranging the cover member 30a. The opening position of the bolt mounting hole 32 must be taken into consideration. This is because, at the opening position, the distance between the magnet rotating plate 20A and the configuration on the track rail 3 side changes drastically and the action of magnetic force on the magnet rotating plate 20A due to the eddy current becomes unstable. is there. Therefore, it is necessary to limit the size of the magnet rotating plate 20A so as to avoid the opening position, thereby reducing the amount of permanent magnets included in the magnet rotating plate 20A and reducing the power generation capacity of the power generation module 20. It will be. On the other hand, if the cover member 30a is used as in the present embodiment, it is not necessary to limit the size of the magnet rotation plate 20A because of the presence of the bolt mounting holes 32, so the power generation capacity of the power generation module 20 is maintained high. It becomes possible. Further, it is possible to prevent foreign matter (cutting chips, coolant, etc.) from entering the bolt mounting hole 32 by the cover member 30a.

  Next, a power generation system in the linear guide 1 according to the second embodiment of the present invention will be described with reference to FIG. In addition, about the structure substantially the same as the structure of the electric power generation system shown in FIG. 1, the detailed description is abbreviate | omitted by attaching | subjecting the same reference number. In the linear guide 1 shown in FIG. 5, the cover member 30 a shown in FIG. 1 is not provided on the rail body 30. Therefore, it is possible to confirm the bolt mounting hole 32 that opens in the upper surface 33 of the rail body 30. A bolt is disposed in the bolt mounting hole 32, and the track rail 3 is fixed to the metal fixing member 35 by the bolt. In this case, the fixing member 35 and the track rail 3 (rail body 30) correspond to the track member of the present invention. In the power generation system applied to the linear guide 1 configured as described above, the power generation module 20 mounted in the vibration detection device 10 is considered in consideration of the influence of the opening of the bolt mounting hole 32 mentioned in the first embodiment. Is different from that of the first embodiment.

  Here, FIG. 6 shows the power generation module 20 mounted in the vibration detection apparatus 10 of the present embodiment in a state where the description of the apparatus main body 10a is omitted. The power generation module 20 of the present embodiment includes a magnet rotation plate 20 </ b> A having a rotatable configuration, a circular base plate 20 </ b> B, and a coil member 25. FIG. 7 shows a schematic configuration of the power generation module 20. Specifically, in the upper part (a) of FIG. 7, the description of the base plate 20B is omitted so that the configuration of the power generation module 20 can be easily understood. Further, in the lower part (b) of FIG. 7, a state in which the power generation module 20 is viewed from the same direction as FIG. 6 is described.

  In the power generation module 20, the rotation shaft 23 is rotatably fitted in the base plate 20 </ b> B, and the base plate 20 </ b> B is fixed to the device main body 10 a of the vibration detection device 10. On the other hand, in the magnet rotating plate 20A, as in the first embodiment, six fan-shaped permanent magnets 21 having a cross section are arranged on the surface side of the cylindrical base member 22, and inside the base member 22, The rotating shaft 23 is fitted. Therefore, the six permanent magnets 21 are integrally arranged around the rotation shaft 23 and are rotatably arranged with respect to the base plate 20B connected to the apparatus main body 10a. In the circumferential direction of the rotation of the six permanent magnets 21, A generally continuous rotating circumferential surface 200 is formed. Further, the magnetic characteristics of the permanent magnets 21 are set so that different magnetic poles are alternately arranged on the surface in the rotational circumferential direction of each of the six permanent magnets 21. As described above, the magnet rotating plate 20A having a rotatable configuration by the rotating shaft 23, the base member 22, and the six permanent magnets 21 corresponds to the rotating magnet portion of the present invention.

In the power generation module 20, the three coil members 25 are positioned on the side surface side of the magnet rotating plate 20A (the surface side of each permanent magnet 21 different from the rotating circumferential surface) so that these coil members 25 are the base plate 20B. Is placed on top. Therefore, when the moving block 2 moves relative to the track rail 3, the magnet rotating plate 20 </ b> A rotates around the rotating shaft 23 through the eddy current generated on the upper surface 33 of the rail body 30. As a result, when the magnetic flux generated by the permanent magnets 21 penetrating the three coil members 25 fluctuates, current is generated in the three coil members 25 and power generation is performed. Therefore, the base plate 20B and the three coil members 25 correspond to the power generation unit of the present invention.

  In addition, bolt mounting holes 32 are arranged in the upper surface 33 of the rail body 30 along the longitudinal direction of the track rail 3. If the power generation module 20 moves on the upper surface 33 so that the rotating peripheral surface 200 of the magnet rotating plate 20A overlaps the opening of the bolt mounting hole 32, eddy current due to the action of the permanent magnet 21 of the magnet rotating plate 20A is generated. It becomes difficult to effectively generate the upper surface 33. Therefore, as shown in FIG. 8, when the moving block 2 performs relative movement in a state of looking down on the upper surface 33, the region 33 </ b> A on the upper surface 33 through which the rotating circumferential surface 200 of the magnet rotating plate 20 </ b> A passes while facing. However, the correlation of the power generation module 20 with respect to the track rail 3 is determined so as not to overlap the opening of the bolt mounting hole 32. At this time, the extending direction of the rotating shaft of the magnet rotating plate 20 </ b> A (the one-dot chain arrow in FIG. 8) is in a positional relationship orthogonal to the longitudinal direction of the track rail 3. The distance between the lowest point of the rotating peripheral surface 200 and the upper surface 33 is a predetermined distance Δh suitable for generating an eddy current on the upper surface 33 as shown in the upper part (a) of FIG. Thus, the correlation of the power generation module 20 with respect to the track rail 3 is determined.

  According to the power generation module 20 configured as described above, the power generation module 20 can efficiently generate power continuously according to the relative movement of the moving block 2 with respect to the track rail 3 without being affected by the bolt mounting holes 32. Electric power can be supplied as operating power for the acceleration sensor 11 and the wireless module 14 in the vibration detection device 10. As a result, it is possible to suitably detect acceleration data that is a parameter relating to vibration of the moving block 2 and transmit it to the information processing apparatus 100 wirelessly in a timely manner. Thereby, the information processing for the maintenance of the linear guide 1 in the information processing apparatus 100 can be suitably realized, and it is expected to greatly contribute to the efficiency of the user's maintenance work.

<Modification>
In the above-described embodiment, the power generation module 20 is disposed so that the rotation circumferential surface 200 of the magnet rotation plate 20A having a rotatable configuration faces the surface (the cover member 30a and the upper surface 33) located above the track rail 3. As a result, an eddy current is generated on the surface located above the track rail 3, thereby generating a moment for rotating the magnet rotating plate 20A. Instead of such a configuration, the power generation module 20 may be arranged such that the rotating circumferential surface 200 faces a side surface of the rail body 30, desirably a side surface other than the ball rolling surface 31. Furthermore, as another method, the power generation module 20 may be arranged such that the rotating peripheral surface 200 faces the surface of the fixing member 35. In any case, the distance between the rotating peripheral surface 200 and the side surface of the rail body 30 or the distance between the rotating peripheral surface 200 and the surface of the fixing member 35 is the predetermined distance Δh suitable for the generation of the eddy current. It is said. Even in such a configuration, it is possible to efficiently generate power continuously in accordance with the relative movement of the moving block 2 with respect to the track rail 3.

DESCRIPTION OF SYMBOLS 1 ... Linear guide, 2 ... Moving block, 3 ... Track rail, 4 ... Block main body, 5 ... End plate, 10 ... Vibration detection apparatus, 10a ... Device main body, DESCRIPTION OF SYMBOLS 11 ... Acceleration, 12 ... Processing circuit, 13 ... Power storage device, 14 ... Wireless module, 20 ... Power generation module, 20A ... Magnet rotation plate, 20B ... Base plate, 21 ..Permanent magnet, 22 ... base member, 23 ... rotating shaft, 25 ... coil member, 30 ... rail body, 30a ... cover member, 32 ... bolt mounting hole, 33
... Upper surface, 35 ... Fixing member, 100 ... Information processing device

Claims (10)

A track member extending along the longitudinal direction and having a metal surface portion, and disposed so as to face the track member via a plurality of rolling elements, and relative to the track member along the longitudinal direction. A linear motion device having a movable member movable to
A rotating magnet unit in which a plurality of permanent magnets are rotatably supported, and a rotating magnet unit in which different magnetic poles are alternately formed on a rotating peripheral surface of the rotating magnet unit;
The rotating shaft of the rotating magnet unit intersects the longitudinal direction of the track member at a predetermined angle, and a part of the rotating circumferential surface of the rotating magnet unit faces the surface unit and the rotating circumference. The rotating magnet portion is arranged on the moving member so that a distance between a part of the surface and the surface portion becomes a predetermined distance that generates an eddy current in the surface portion by relative movement of the moving member with respect to the track member. An arrangement part to be
A coil member disposed adjacent to the rotating magnet portion that rotates in accordance with relative movement of the moving member with respect to the track member, and generates electric power by a magnetic flux change passing through the coil member by rotation of the rotating magnet portion; A power generation unit;
A power generation system in a linear motion device. The surface portion is a cover member that is attached to the main body of the track member so that the moving member is a surface that faces the main body of the track member and the plurality of rolling elements do not roll. is there,
The power generation system in the linear motion apparatus according to claim 1. The track member has a predetermined fixing member to which the main body of the track member is attached, and the moving member is a surface facing the main body of the track member and the plurality of rolling elements are not facing each other. , Having a mounting hole for mounting the track member to the predetermined fixing member,
The arrangement portion is configured so that the rotating magnet portion is placed on the moving member so that the rotating circumferential surface of the rotating magnet portion does not overlap the mounting hole when the moving member moves relative to the main body of the track member. Deploy,
The power generation system in the linear motion apparatus according to claim 1. The arrangement portion arranges the rotary magnet portion on the moving member so that a rotation peripheral surface of the rotation magnet portion faces the surface portion located on a side surface of the track member.
The power generation system in the linear motion apparatus according to claim 1. The track member has a predetermined fixing member to which a main body of the track member is attached,
The arrangement portion arranges the rotating magnet portion on the moving member such that a rotating peripheral surface of the rotating magnet portion faces the surface portion on the predetermined fixing member.
The power generation system in the linear motion apparatus according to claim 1. The surface portion is made of a nonmagnetic metal.
The power generation system in the linear motion apparatus according to any one of claims 1 to 5. The coil member is disposed so as to surround the rotating magnet portion rotatably supported by the coil member.
The power generation system in the linear motion apparatus according to any one of claims 1 to 6. The coil member is located at a position facing a surface on the rotating magnet portion different from the rotating circumferential surface, and the rotating magnet is rotated as the rotating magnet portion rotates with relative movement of the moving member with respect to the track member. Arranged at the position where the magnetic flux from the part fluctuates,
The power generation system in the linear motion apparatus according to any one of claims 1 to 6. The predetermined angle is an angle orthogonal to the longitudinal direction of the track member.
The power generation system in the linear motion apparatus according to any one of claims 1 to 8. A power storage device that stores the power generated by the power generation unit is further provided.
The power generation system in the linear motion apparatus according to any one of claims 1 to 9.

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