JP2010182903A - Rotary solenoid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solenoid valve having a structure suitable for size reduction. <P>SOLUTION: An internal fixed magnetic pole 50 is arranged in the space enclosed by an upper spool 20 and a lower spool 30 as rotating components, and a coil 40, and a shaft 77 is supported by the internal fixed magnetic pole 50 via a ball bearing 64. Further, both end surfaces of permanent magnets 54a and 54b are supported by a permanent magnet support portion 57a of a supporting body 55a and a permanent magnet supporting portion 55b of a permanent magnet supporting body 57b to oppose part of a wire constituting the coil 40 to both inner outer peripheral surfaces and inner peripheral surfaces of those permanent magnets. Therefore, the coil is wired to both the inner outer peripheral surfaces and inner peripheral surfaces of the permanent magnets to generate larger Lorentz force, and parts of the magnetic poles and the bearing are located in constitution corresponding to a coil bobbin, thereby facilitating the size reduction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rotary solenoid, and more particularly, to a rotary solenoid having a structure that can be easily downsized and is suitable for obtaining high torque.

  The rotary solenoid generally has a configuration such as a coil, a fixed magnetic pole, a rotor, a permanent magnet, a stopper, and a shaft. In many cases, the rotor rotates until it is regulated by the stopper by the magnetic force generated when the coil is energized, and when the energization is stopped, the rotor is attracted to the permanent magnet and returned to the position before the energization. .

  In such a rotary solenoid, various structures have been proposed in order to increase the torque. For example, in the rotary solenoid disclosed in Japanese Patent Application Laid-Open No. 2004-172353, a pair of protrusions are provided at positions symmetrical with respect to the rotation axis of the fixed magnetic pole, and one of the pair of permanent magnets provided on the rotor is provided. The structure is provided so as to be shifted in the rotation direction and close to the fixed magnetic pole.

  In other examples, since the shape of the fixed magnetic pole and the arrangement of the permanent magnets have a great influence on the torque, many improvements are made to the fixed magnetic pole and the permanent magnet.

  However, in many cases, the improvement of the fixed magnetic pole cannot increase the torque sufficiently to increase the processing cost of the fixed magnetic pole and the permanent magnet provided therewith. Further, in the improvement in which complicated irregularities are added to the fixed magnetic pole, the arrangement space of the fixed magnetic pole is often increased, and there is a problem that it is difficult to reduce the size.

JP 2004-172353 A

  In order to solve the above-described problems, an object of the present invention is to provide a rotary solenoid that is easy to downsize and has a structure suitable for obtaining high torque.

  The invention according to claim 1 is a shaft provided rotatably in the right and left, a coil bobbin provided integrally with the shaft, a coil formed by winding a metal wire around the coil bobbin, A first permanent magnet and a second permanent magnet disposed in the vicinity of the shaft; and an internal fixed magnetic pole disposed so as to be interposed between the first permanent magnet and the second permanent magnet. In the rotary solenoid, the coil bobbin includes a first winding frame part and a second winding frame part arranged so that the internal fixed magnetic pole is interposed, and the first winding frame part and the second winding frame part are provided. The frame is a rotary solenoid characterized in that the shaft is inserted, and the internal fixed magnetic pole is formed with a through hole, and the shaft is inserted into the through hole.

  According to a second aspect of the present invention, in the first aspect of the invention, the shaft is further fitted into an inner ring, an outer ring is fitted into the through hole of the inner fixed magnetic pole, and the shaft is It is a rotary solenoid characterized by having a bearing that is rotatably supported.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, in the coil, a part of the filament is each of the first permanent magnet and the second permanent magnet. A current flowing through a portion of the wire facing the inner surface and the outer surface of the first permanent magnet when the coil is energized is provided so as to face the inner surface and the outer surface. And a current flowing through a portion of the filament facing the inner surface and the outer surface of the second permanent magnet is a second direction opposite to the first direction. It is a solenoid.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the coil bobbin includes a first opening part through which the shaft is inserted into the first winding frame part, and the wire of the coil. A second opening and a third opening inserted through a portion facing the inner surface of the permanent magnet, a fourth opening formed by inserting the shaft into the second winding frame, and the coil The rotary solenoid is characterized in that a fifth opening and a sixth opening are formed so as to pass through portions of the filaments facing the inner surfaces of these permanent magnets.

  According to a fifth aspect of the invention, in the invention according to any one of the first to fourth aspects of the invention, the case is interposed between the first permanent magnet and the second permanent magnet. A rotary solenoid fixed to the case and the internal fixed magnetic pole and further supporting a first permanent magnet and a second permanent magnet.

  The invention according to claim 6 is the invention according to claim 5, wherein the case is formed such that the groove extends in a direction perpendicular to the inner peripheral surface, and the support has an end at the groove of the case. It is the rotary solenoid characterized by being fitted by.

  The invention according to claim 7 is the rotary solenoid according to any one of claims 2 to 6, wherein the bearing is a ball bearing or a needle bearing. It is.

  According to the first aspect of the present invention, the internal fixed magnetic pole is disposed between the first winding frame portion and the second winding frame portion constituting the coil bobbin, and the shaft is provided so as to pass through them. In addition, an internal fixed magnetic pole can be disposed inside the coil bobbin. Therefore, the arrangement space of the internal fixed magnetic pole can be greatly reduced as compared with the conventional structure arranged around the outer periphery of the coil bobbin. Furthermore, it is possible to reduce the size of the conventional rotary solenoid that exhibits the same degree of torque.

  According to the second aspect of the present invention, since the bearing that supports the shaft is fitted in the through hole of the internal fixed magnetic pole, the shaft support means can also be provided inside the coil bobbin, and the space for arranging the support means Can be greatly reduced.

  According to the third aspect of the present invention, a part of the filament constituting the coil is opposed to both the inner and outer surfaces of the first permanent magnet and the second permanent magnet. Lorentz force is applied to both the filaments facing the outer surface and the filaments facing the outer surface. Therefore, a larger torque can be obtained than a rotary solenoid of the same size according to the prior art. As a result, the rotary solenoid can be miniaturized.

  According to the fourth aspect of the present invention, the first to third openings are formed in the first winding frame, and the fourth to sixth openings are formed in the second winding frame. It becomes easy to insert the shaft through the frame portion and to make the coil filaments face the inner surfaces of the first permanent magnet and the second permanent magnet.

  According to the fifth aspect of the present invention, the support is fixed to the case and the internal fixed magnetic pole, and the two permanent magnets are supported, so that the two permanent magnets are strengthened with a relatively simple structure. Can be supported.

  According to the sixth aspect of the present invention, since the groove is formed in the case so as to extend in the vertical direction, the support body can be inserted and fitted into the case at the same time.

  According to the seventh aspect of the invention, since the bearing is an inexpensive ball bearing or needle bearing, the manufacturing cost of the rotary solenoid can be reduced.

It is a cross-sectional perspective view which shows the support structure of a rotation part. It is a disassembled perspective view of the rotary solenoid which concerns on embodiment of this invention. It is a perspective view which shows the rotary solenoid which concerns on embodiment of this invention. It is a section explanatory view (1) of a rotary solenoid concerning an embodiment of the invention, (a) is a front view and (b) is an AA line sectional view. It is sectional explanatory drawing (2) of the rotary solenoid which concerns on embodiment of this invention, (a) is a side view, (b) is a BB sectional view, (c) is a CC sectional view. . It is a disassembled perspective view which shows the rotation stop structure of an upper winding frame and a lower winding frame. It is explanatory drawing of an upper reel, (a) is a top view, (b) is a front view, (c) is a side view. It is a perspective view (1) which shows the structure of a coil and its peripheral part. It is a perspective view (2) which shows the structure of a coil and its peripheral part. It is a perspective view which shows operation | movement of the rotary solenoid which concerns on embodiment of this invention. It is a perspective view which shows the winding order of the coil which concerns on the 1st Embodiment of this invention.

  Hereinafter, a rotary solenoid according to an embodiment of the present invention will be described with reference to the drawings. FIG. 2 is an exploded perspective view of the rotary solenoid according to the embodiment of the present invention. FIG. 3 is a perspective view showing a rotary solenoid according to the embodiment of the present invention. In FIG. 2, 10 is a rotary solenoid, 20 is an upper winding frame, 21a and 21b are side wiring paths, 24b wire support portions, 27 and 28 are separation wiring paths, 29 is a through hole, 30 is a lower winding frame, 31a And 31b are side wiring paths, 34a and 34b are wire support portions, 35a and 35b are openings, 39 is a through hole, 40 is a coil, 41a and 41b are outer vertical wires, and 42a and 42b are inner vertical wires. 43 and 44 are upper filaments, 44 and 45 are lower filaments, 47 are ball bearings, 48 are through holes, 50 are internal fixed magnetic poles, 51a and 51b are fitting grooves, 52a and 52b are screw holes, 53 is Openings, 54a and 54b are permanent magnets, 55a and 55b are supports, 56a and 56b are fitting parts, 57a and 57b are permanent magnet support parts, 58a and 58b are fitting parts, and 59a and 59b are beading parts. Hole, 60 is a case, 61a and 61b are fitting grooves, 62a and 62b are screw holes, 63 is a nut, 64 is a ball bearing, 65a and 65b are screws, 66 is a stopper, 67 is a thin portion, and 68b is a contact surface 69, slit, 70, washer, 71, spacer, 72, washer, 73, end cap, 74a, 74b, 74c and 74d, vent holes, 75, opening, 76, step, 77, shaft, 78, proximal end A part 79 is a tip part. In addition, about the coil 40, in each drawing including FIG. 2, description of the fine aspect which wound the filament repeatedly is abbreviate | omitted, and it represents with the general external appearance shape. 3 denote the same components as those in FIG.

  As shown in FIG. 3, the rotary solenoid 10 is housed in a case 60 whose internal structure is substantially cylindrical. The case 60 has an open structure in which an end cap is not provided on the upper surface in order to improve heat dissipation. Accordingly, the upper reel 20 and the like are exposed on the upper surface of the rotary solenoid 10. The rotary solenoid 10 may have a dustproof structure by providing an end cap on the upper surface. As shown in FIG. 2, the internal structure of the rotary solenoid 10 is provided with an upper winding frame 20 and a lower winding frame 30 that constitute a coil bobbin, a coil 40, a shaft 77, and the like as rotating components. Furthermore, as a fixed component that generates a rotational force or supports a rotating object, an internal fixed magnetic pole 50, permanent magnets 54a and 54b, supports 55a and 55b, ball bearings 47 and 64, a stopper 66, and the like are provided. ing.

  The detailed structure and the like of the rotary solenoid 10 will be described below in detail with reference to FIGS. 2, 4, 5, 7, 8, and 9. FIG. 4A and 4B are cross-sectional explanatory views (1) of the rotary solenoid according to the embodiment of the present invention, where FIG. 4A is a front view and FIG. 4B is a cross-sectional view taken along line AA. FIG. 5 is a cross-sectional explanatory view (2) of the rotary solenoid according to the embodiment of the present invention, where (a) is a side view, (b) is a cross-sectional view along line BB, and (c) is C-- FIG. Furthermore, FIG. 7 is explanatory drawing of an upper reel, (a) is a top view, (b) is a front view, (c) is a side view. FIG. 8 is a perspective view (1) showing the configuration of the coil and its peripheral part. In addition, FIG. 9 is a perspective view (2) showing the configuration of the coil and its peripheral part. In FIG. 4, reference numerals 22 and 32 denote shaft holding portions, and other reference numerals are the same as those in FIG. In FIG. 5, reference numerals 37 and 38 denote side wiring paths, and other reference numerals are the same as those in FIG. Further, in FIG. 5, 23a and 23b are contact portions, 24a is a filament support portion, 25a and 25b are opening portions, 26a and 26b are contact portions, and other reference numerals are the same as those in FIGS. Indicates. In FIG. 7, reference numeral 22 denotes a shaft holding portion, and other reference numerals are the same as those in FIG. Also, all the reference numerals in FIG. 8 indicate the same as those in FIG. In FIG. 9, reference numeral 80 indicates a branch point, and other reference numerals are the same as those in FIG.

  First, components that rotate the rotary solenoid 10 will be described. The coil bobbin of this embodiment has a structure in which the upper winding frame 20 and the lower winding frame 30 are completely separated as shown in FIG. The upper reel 20 has a substantially cylindrical portion near the center, and has an outer shape in which the side wiring paths 21a and 21b protrude from the left and right sides. The side wiring paths 21a and 21b have a shape in which the upper side is opened like a road side groove. Further, as shown in FIG. 5 (a), the separation wiring path 27 and the separation wiring path 28 are formed so as to surround the periphery of the shaft holding portion 22 by half a circumference. The wiring path 21b is connected. The side wiring paths 21a and 21b are each formed with an opening 25a and an opening 25b, and line support portions 24a and 25b are formed at the tip side of the openings 25a and 25b.

  As shown in FIG. 4B, the shaft holding portion 22 is formed thicker than the separation wiring paths 27 and 28. Further, as shown in FIG. 2, a through hole 29 for inserting the shaft 77 is formed in the center portion of the shaft holding portion 22. The shaft holding portion 22 is made thicker than the other portions so as not to be inclined with respect to the shaft 77, that is, so that the central axis of the shaft 77 and the rotation axis of the upper reel 20 coincide. Yes. The upper reel 20 is fixed to the shaft 77 by tightening with a nut 63. In addition, in order to fix more reliably, it is preferable to use together the means which apply | coats an adhesive agent to the internal peripheral surface of the through-hole 29, and adhere | attaches on the shaft 77 with this adhesive agent. The lower reel 30 is arranged in a state where the upper reel 20 is turned upside down. The side wiring paths 31a and 31b, the shaft holding part 32, the line support parts 34a and 34b, the openings 35a and 35b, the separation wiring paths 37 and 38, and the through holes 39 of the lower winding frame 30 are respectively formed on the upper winding frame 20. Is exactly the same shape as the portion corresponding to.

  Further, as shown in FIG. 2 and FIG. 4B, the upper reel 20 and the lower reel 30 are arranged so that the separation wiring paths 27 and 28 and the separation wiring paths 37 and 38 face each other. Has been. In addition, a washer 70, a ball bearing 64, and a spacer 71 are interposed between the upper reel 20 and the lower reel 30, and the interval between the upper reel 20 and the lower reel 30 is interposed. This is the total height. Further, permanent magnets 54 a and 54 b are arranged between the upper reel 20 and the lower reel 30. The upper reel 20 and the lower reel 30 and the permanent magnets 54a and 54b are very close to each other, but the tolerances are such that they do not interfere with the rotation of the upper reel 20 and the lower reel 30. Is set. In addition, the space | interval of the upper reel 20 and the lower reel 30 can be freely changed by changing the height of the spacer 71 suitably.

  In the side wiring paths 21a and 21b and the side wiring paths 31a and 31b, a part of the line forming part of the coil 40, which is also called a coil wire, is formed on the inner surface (shaft 77 side) of the permanent magnets 54a and 54b. It is provided so as to face the outer surface (case 60 side). That is, permanent magnets 54 a and 54 b are arranged between the upper reel 20 and the lower reel 30. Outer vertical strips 41a and 41b and inner vertical strips 42a and 42b are arranged so as to face the inner and outer surfaces of the permanent magnets 54a and 54b, respectively. That is, the outer vertical line 41a and the outer vertical line 41b shown in FIG. 2 are vertically wired so as to connect the tips of the line support portions 24a and 25b and the tips of the line support portions 34a and 35b. Has been. Furthermore, the inner vertical strip 42a and the inner vertical strip 42b are wired vertically so as to connect the openings 25a and 25b and the openings 35a and 35b.

  Therefore, in the coil 40, as shown in FIG. 8, the outer vertical line 41a and the inner vertical line 42a, and the outer vertical line 41b and the inner vertical line 42b are in a state where the permanent magnets 54a and 54b are interposed, respectively. And provided vertically and in parallel. The outer vertical strips 41a and 41b and the inner vertical strips 42a and 42b are very close to the inner and outer surfaces of the permanent magnets 54a and 54b. A tolerance that does not hinder the rotation of the frame 20 and the lower reel 30 is set.

  Moreover, the coil 40 is comprised by the upper filament 43 and 44 and the lower filament 45 and 46 other than the above-mentioned vertical filament. As shown in FIG. 9, the upper filaments 43 and 44 are separated at a branch point 80 and wired so as to pass through the separation wiring path 27 and the separation wiring path 28, respectively. Also, the lower filaments 45 and 46 are wired in the same manner. Further, the outer shape of the coil 40 is substantially point-symmetric with respect to the central axis of the shaft 77. Therefore, the weight of the coil 40, the upper winding frame 20, and the lower winding frame 30 applied to the shaft 77 does not cause the separation wiring path 28 to be heavier than the separation wiring path 27 side or the side wiring path 21a side, for example. The configuration is balanced with respect to the central axis of the shaft 77. With this configuration, when the coil 40 is rotating, the shaft 77 hardly oscillates due to an unbalanced load.

  Here, the winding order of the coil 40 will be described. FIG. 11 is a perspective view showing the winding order of the coil according to the embodiment of the present invention. In FIG. 11, 81 and 82 are external drawer | drawing-out filaments, and another code | symbol shows the same thing as FIG. The winding sequence of the coil 40 is based on the external lead wire 81 led out of the case 60 as a base point from the wire support portion 24a of the upper winding frame 20 to the side wiring path 21a, the separation wiring path 28, and the side wiring. It goes to the filament support part 24b via the wiring path 21b, and then goes around the end of the filament support part 24b to the filament support part 34b of the lower reel 30. Further, the filament support part 34b passes through the side wiring path 31b, the separation wiring path 37, and the side wiring path 31a, passes through the opening 35a, and travels toward the opening 25a. Next, it passes through the opening 25 a and goes to the opening 25 b via the separation wiring path 27. This time, it passes through the opening 25b and goes to the opening 35b. After passing through the opening 35b, it goes to the filament support 34a via the separation wiring path 38 and the side wiring path 31a. Furthermore, it returns to the filament support part 24a from the filament support part 34a. After repeating the winding order returning from the filament support part 24a to the filament support part 24a a predetermined number of times, it reaches from the filament support part 24a to the external lead line 82 which is the end point. By the above winding order, the direction of the electric current mentioned later of the outer side vertical stripes 41a and 41b and the inner side vertical stripes 42a and 42b at the time of electricity supply is implement | achieved. In order to obtain a larger Lorentz force, the outer vertical line 41a and the inner vertical line 42a, and the outer vertical line 41b and the inner vertical line 42b are arranged on the inner side surface and the outer side of the permanent magnet 54a and the permanent magnet 54b. It is preferable to be provided so as to be parallel from the upper end to the lower end of the side surface, that is, over the entire inner surface and outer surface.

  Returning to FIG. 2, the outer ring of the ball bearing 64 is fitted into the opening 53 of the internal fixed magnetic pole 50, and the base end 78 of the shaft 77 is inserted into the inner ring. The shaft 77 has a load connected to the tip 79. Further, although not shown in the drawing, the base end portion 78 is formed with a screw thread for screwing the nut 63. Further, a step 76 is formed at the boundary between the distal end portion 79 and the proximal end portion 78 so that the diameter of the proximal end portion 78 is reduced. In addition, the tip 79 has a diameter larger than the inner diameter of the washer 72. Further, the washer 72, the lower winding frame 30, the spacer 71, the ball bearing 64, the washer 70, and the upper winding frame 20 are inserted into the base end portion 78 in this order. When the nut 63 is screwed into the thread of the base end portion 78 and tightened in the inserted state, the washer 72, the lower winding frame 30, the spacer 71, the ball bearing 64, the washer as shown in FIG. 5B. 70 and the upper reel 20 are fastened between the step 76 of the shaft 77 and the nut 63 to be integrated. Since the outer diameters of the spacer 71 and the washer 70 are smaller than the outer diameter of the inner ring of the ball bearing 64, the spacer 71 and the washer 70 do not contact the outer ring of the ball bearing 64. Therefore, the shaft 77, the washer 72, the lower winding frame 30, 71 are spacers, the washer 70, the upper winding frame 20, and the nut 63 are freely rotated from side to side with the ball bearing 64 supported by the internal fixed magnetic pole 50 as a bearing.

  Further, the structure for restricting the rotation of the rotating component described above will be described. FIG. 6 is an exploded perspective view showing the rotation stop structure of the upper reel and the lower reel. In FIG. 6, 49 is a rotation range, 68a is an abutting surface, and the other symbols are the same as those in FIGS. In a state where the lower reel 30 or the like is incorporated in the case 60, a stopper 66 is disposed in the vicinity of the lower reel 30. As shown in FIG. 2, the stopper 66 has a thin portion 67 at the top, and a slit 69 is formed at the center of the thin portion 67. The lower portion of the fitting portion 56b of the support body 55b is fitted into the slit 69. As will be described later, since the fitting portion 56 b is also fitted to the case 60, the stopper 66 is fixed integrally with the case 60. The side wiring paths 31a and 31b of the lower reel 30 rotate to the left and right according to the rotation. However, since the stopper 66 is disposed in the immediate vicinity, the side wiring paths 31a and the side wiring paths are rotated at a predetermined angle. Any one of 31b abuts against the stopper 66, and the lower reel 30 stops rotating any more. In other words, if a rotation range 49 that is an angle formed by the side wiring path 31a and the side wiring path 31b is appropriately set, for example, the side wiring paths 31a and 31b have a shape in which the distal end side is opened radially (fan-shaped). Alternatively, the rotation angle can be freely set by providing a protrusion for contacting the stopper 66. In FIG. 6, the stopper 66 is provided on the support 55b side, but may be provided on the support 55a side. In this case, the rotation of the lower reel 30 or the like is restricted by the surface on the opposite side of the side wiring paths 31a and 31b. Further, the stopper 66 may be turned upside down so as to contact the upper reel 20.

  By the way, the lower winding frame 30 is formed with contact portions 33a and 33b and contact portions 36a and 36b at the edge thereof. The contact part 33a and the contact part 33b are formed in steps having the same size, and are formed so as to face each other. Also, contact portions 36a and 36b having the same shape are formed on the opposite edge across the side wiring paths 31a and 31b. Further, as shown in FIG. 5A, the upper winding frame 20 is also formed with contact portions 23a and 23b and contact portions 26a and 26b with exactly the same shape and arrangement. These abutting portions are used for positioning a jig placed between the two so that the permanent magnets 54a and 54b are not attracted to the internal fixed magnetic pole 50 and interfere with the operation when the rotary solenoid 10 is assembled. That is, the jig can be positioned easily by lightly fitting between the abutting portions facing each other such as the abutting portion 33a and the abutting portion 33b, thereby facilitating the operation. The placed jig may be pulled out after the permanent magnets 54a and 54b are attached.

  Next, fixed components of the rotary solenoid 10 will be described with reference to FIG. The internal fixed magnetic pole 50 forms a magnetic circuit together with the permanent magnets 54 a and 54 b and the case 60 when the coil 40 is energized. Further, as described above, the ball bearing 64 which is a bearing of the shaft 77 is fitted, and also has a role of supporting the rotating component. Further, the inner fixed magnetic pole 50 has a fitting groove 51a and a fitting groove 51b formed in a vertical direction at positions facing away from each other, and a screw hole 52a and a fitting groove 51a at the center of the fitting groove 51b. 52b is formed. The fitting groove 51a and the fitting groove 51b are fitted into the fitting portion 58a of the support 55a and the fitting portion 58b of the support 55b.

  The support bodies 55a and 55b include permanent magnet support portions 57a and 57b formed in a substantially arc plate shape, fitting portions 58a and 58b protruding from the concave surfaces, and fitting portions 56a and 56b protruding from the convex surfaces. It consists of and. In the permanent magnet support portions 57a and 57b, the side surfaces of the permanent magnets 54a and 54b are bonded to the left and right side surfaces. As described above, the fitting portion 58a and the fitting portion 58b are fitted into the fitting groove 51a and the fitting groove 51b, respectively. Furthermore, screw holes 59a and 59b are provided at a portion where the permanent magnet support portion 57a and the fitting portion 56a of the support body 55a intersect and a portion where the permanent magnet support portion 57b and the fitting portion 56b of the support body 55b intersect. Is formed.

  The case 60 is formed with fitting grooves 61a and 61b on the inner peripheral surface thereof, into which the fitting portion 56a and the fitting portion 56b are fitted. Further, as will be described later, when the coil 40 is energized, the permanent magnets 54 a and 54 b and the internal fixed magnetic pole 50 constitute a magnetic circuit. Therefore, the case 60 has a function as an external fixed magnetic pole in addition to the function of protecting the internal mechanism. Furthermore, screw holes 62a and 62b are formed in the center of the fitting grooves 61a and 61b. The screws 65a and 65b are screwed through the screw holes 62a and 62b of the case 60, the screw holes 59a and 59b of the support 55a, and the screw holes 52a and 52b of the internal fixed magnetic pole 50. Therefore, as shown in FIGS. 5B and 5C, the internal fixed magnetic pole 50 and the supports 55a and 55b are firmly fixed to the case 60 by the fitting structure and the screws 65a and 65b. ing. Further, the permanent magnets 54a and 54b are fixed by being sandwiched between and bonded to the supports 55a and 55b. It should be noted that the left and right end surfaces of the permanent magnets 54a and 54b and the permanent magnet support portions 57a and 57b may be formed with irregularities so that the permanent magnets 54a and 54b are more firmly fixed.

  As shown in FIG. 5B, the end cap 73 is fitted to the distal end portion 79 side of the shaft 77 of the case 60. An opening 75 is formed at the center of the end cap 73, and through holes 74a, 74b, 74c, and 74d are formed around the opening 75. A ball bearing 47 is fitted into the opening 75. A tip end 79 of a shaft 77 is fitted in the through hole 48 of the ball bearing 47, and the shaft 77 rotates integrally with the inner ring of the ball bearing 47. Therefore, the tip portion 79 of the shaft 77 is supported by the ball bearing 47 and prevents the shaft 77 from swinging (swinging) due to a load applied to the tip portion 79 side when the shaft 77 rotates. The through holes 74a, 74b, 74c and 74d are formed to facilitate screwing when the rotary solenoid 10 is assembled.

  The shaft 77 has a diameter that is smaller than that of the distal end portion 79 on the base end portion 78 side, and a boundary is a step 76. Further, the shaft 77 is formed with a screw thread (not shown) in the vicinity of the end portion of the base end portion 78, and the nut 63 is screwed in as described above. Further, since the shaft 77 is supported by the ball bearing 47 and the ball bearing 64, it is possible to reduce rotation unevenness and swing due to the inertia moment of the coil 40 and the like. The shaft 77 in the present embodiment operates regardless of whether the material is magnetic or nonmagnetic. In particular, when a large torque is required, a magnetic material is preferably used, and electromagnetic stainless steel is particularly preferable.

  Next, a structure for supporting the rotating components of the rotary solenoid 10 will be described. FIG. 1 is a cross-sectional perspective view showing a support structure of a rotating part. 1 are all the same as those in FIG. As described above, the shaft 77 has the ball bearing 47, the end cap 73, the washer 72, the lower winding frame 30, the spacer 71, the internal fixed magnetic pole 50, the ball bearing 64, the washer 70, and the upper winding in order from the tip end 79 side. The frame 20 is inserted and finally tightened with a nut 63. The shaft 77 is fitted to the inner ring of the ball bearing 64, while the outer ring is fitted to the inner fixed magnetic pole 50. Accordingly, the ball bearing 64, which is a bearing of the shaft 77, is supported so as to be rotatable left and right and indirectly supported by the internal fixed magnetic pole 50. Further, the internal fixed magnetic pole 50 is fixed to the case 60 via the supports 55a and 55b. After all, the shaft 77 is indirectly supported by the case 60 via the ball bearing 64, the internal fixed magnetic pole 50, and the supports 55a and 55b.

  Further, the inner surface of the ball bearing 64 is in pressure contact with the lower surface of the washer 70 by tightening the upper surface thereof with the nut 63. Further, the upper surface of the washer 70 is in pressure contact with the lower surface of the upper reel 20. Similarly, the lower surface of the inner ring is in pressure contact with the upper end of the spacer 71, and the lower end of the spacer 71 is in pressure contact with the upper surface of the lower winding frame 30. Therefore, the upper reel 20 and the lower reel 30 constituting the coil bobbin are supported by the inner ring of the ball bearing 64 via the washer 70 and the spacer 71, respectively. Therefore, the upper reel 20 and the lower reel 30 are rotated integrally with the shaft 77 to the left and right. Further, since these rotations are restricted to an angular range in which the lower winding frame 30 contacts the stopper 66, the upper winding frame 20 and the lower winding frame 30 are fitted to the fitting portion 56a of the support 55a or the support 55b. There is no collision with the joint 56b.

  As described above, both end surfaces of the permanent magnets 54a and 54b are supported by the permanent magnet support portion 57a of the support body 55a and the permanent magnet support portion 57b of the support body 55b. The outer vertical lines 41a and 41b and the inner vertical lines 42a and 42b of the coil 40 face each other with a slight gap between the outer peripheral surface and the inner peripheral surface of the permanent magnets 54a and 54b. Since these vertical stripes rotate so as to form a concentric circle around the shaft 77 indirectly supported with respect to the case 60, the gap between the permanent magnets 54a and 54b during the rotation is kept constant and approaches. There is no such thing as touching.

  As described above, the rotary solenoid 10 has the internal fixed magnetic pole 50 disposed in the space surrounded by the upper winding frame 20, the lower winding frame 30 and the coil 40, that is, the space corresponding to the inside of the coil bobbin. Further, the shaft 77 is supported by the internal fixed magnetic pole 50 via the ball bearing 64, but the rotating component such as the shaft is stably supported. Furthermore, by supporting the both end surfaces of the permanent magnets 54a and 54b by the permanent magnet support portion 57a of the support body 55a and the permanent magnet support portion 57b of the support body 55b, both the outer peripheral surface and the inner peripheral surface of these permanent magnets are supported. It is realized that a part of the filament constituting the coil 40 is made to face each other. In addition, since the supports 55a and 55b are firmly fixed to the case 60 as described above, the gap between the permanent magnets 54a and 54b and the internal fixed magnetic pole 50 changes unless a very strong impact is applied. Never do. Therefore, the rotary solenoid 10 has a complicated structure in which a fixed component is provided in a rotating component, but a structure in which each part is not easily deformed even when used for a long period of time and a torque can be stably obtained. ing. As a result, there exists an advantage that the change of the characteristic as a rotary solenoid is small.

  Next, the operation of the rotary solenoid 10 according to the embodiment of the present invention will be described. FIG. 10 is a perspective view showing the operation of the rotary solenoid according to the embodiment of the present invention. The reference numerals used in FIG. 10 are the same as those in FIG.

  In FIG. 10, the outer vertical line 41a and the inner vertical line 42a of the coil 40 are near the center (middle) of the permanent magnet 54a, and at the same time, the outer vertical line 41b and the inner vertical line 42b are of the permanent magnet 54b. It is located so that the center (middle) vicinity is inserted from both sides. Here, when the coil 40 is energized, the outer vertical line 41a and the inner vertical line 42a are in the direction of the arrow A, and the outer vertical line 41b and the inner vertical line 42b are in the direction of the arrow B, that is, 2 A current in the opposite direction flows through each pair of wires. At this time, a magnetic circuit is generated around the permanent magnets 54a and 54b, the case 60, and the internal fixed magnetic pole 50.

  Then, an attempt is made to move the force in the direction in which the right-hand screw advances with respect to the current flowing through the outer vertical stripe 41a and the inner vertical stripe 42a and the outer vertical stripe 41b and the inner vertical stripe 42b, that is, the flow of charged particles. The shear Lorentz force works to move the outer vertical line 41a and the inner vertical line 42a in the direction of arrow C, and the outer vertical line 41b and the inner vertical line 42b in the direction of arrow D. Then. As the coil 40 rotates, the lower winding frame 30 and the like also rotate around the shaft 77. Then, when the lower reel 30 comes into contact with the contact surface 68a of the stopper 66 shown in FIG. 6, the rotation stops there.

  In a state where the rotation is stopped, this time, when current is passed in the direction opposite to that in FIG. 10, the outer vertical line 41a and the inner vertical line 42a, the outer vertical line 41b and the inner vertical line 42b are indicated by arrows C, Move in the opposite direction to D. Then. As the coil 40 rotates, the lower reel 30 and the like also rotate in the reverse direction about the shaft 77. When the lower reel 30 comes into contact with the contact surface 68b of the stopper 66 shown in FIG. 6, the rotation stops there.

  In addition, when rotating the lower reel 30 etc. reversely, you may employ | adopt means other than the means to send an electric current to a reverse direction. For example, the lower reel 30 or the like may be provided so as to be reversely rotated by mechanical means such as a helical spring provided inside or outside the case 60. In this way, when the energization of the coil 40 is stopped when the lower reel 30 or the like rotates to a predetermined angle, the lower reel 30 or the like returns to the original angle by the action of a spring spring or the like. Will come to do.

  As described above, in the rotary solenoid 10 according to the embodiment, the outer vertical line 41a and the inner vertical line 42a of the coil 40 connect the outer peripheral surface and inner peripheral surface of the permanent magnet 54a, and the outer vertical line 41b. And the inner vertical strip 42b are positioned so as to sandwich the outer peripheral surface and the inner peripheral surface of the permanent magnet 54b, and the coil 40 current is allowed to flow in this state. Since the Lorentz force is applied to the coils on the outer peripheral surface side and the inner peripheral surface side of the permanent magnets 54a and 50b, a gap (air gap) is provided in a part of the magnetic circuit so that the gap is filled when energized. Therefore, the efficiency is higher than that of a rotary solenoid that rotates. As a result, size reduction becomes easier than such a rotary solenoid. The permanent magnets 54a and 50b and the internal fixed magnetic pole 50, which often occupy a large capacity among the components of the rotary solenoid, are placed in a space made up of the upper and lower winding frames 20, 30 and the coil 40 constituting the coil bobbin. In addition, since the upper reel 20 and the like, the shaft, and the ball bearing are integrated, it can be said that miniaturization is easy from this point. In addition, since the ball bearing 64 is provided between a fixed component such as the internal fixed magnetic pole 50 and a movable component such as the shaft 77, it is possible to reduce torque attenuation due to frictional resistance. Become. Furthermore, since the shaft 77 is guided by the ball bearing 47 in addition to the ball bearing 64, the shaft 77 can be prevented from swinging. Further, since the configuration of the upper reel 20, the lower reel 30, and the coil 40 is arranged so as to be point-symmetric with respect to the central axis of the shaft 77, the mass is unbalanced such that the mass is concentrated at a specific point. There is no configuration. Therefore, during the rotation of the shaft 77, the swing of the shaft 77 due to the unbalanced configuration can be reduced. Therefore, the rotary solenoid 10 can be easily downsized and has a structure suitable for obtaining a high torque at the same time.

  Note that the present invention is not limited to the above-described contents, and details of the shape of the coil bobbin, the coil, or the structure support, the winding order of the metal filaments on the coil bobbin, etc. Various modifications can be made without departing from the scope described in.

DESCRIPTION OF SYMBOLS 10 Rotary solenoid 20 Upper winding frame 21a Side wiring path 21b Side wiring path 22 Shaft holding part 23a Contact part 24a Line support part 24b Line support part 25a Opening part 25b Opening part 26a Contact part 26b Contact part 27 Separation wiring path 28 Separation wiring path 29 Through hole 30 Lower winding frame 31a Side wiring path 31b Side wiring path 32 Shaft holding portion 33a Contact portion 33b Contact portion 34a Line support portion 34b Line support portion 35a Opening portion 35b Opening portion 36a Contact portion 36b Contact portion 37 Separation wiring path 38 Separation wiring path 39 Through hole 40 Coil 41 Inner fixed magnetic pole 41a Outer vertical stripe 41b Outer vertical stripe 42a Inner vertical stripe 42b Inner vertical stripe 43 Upper line Strip 44 Upper strip 45 Lower strip 46 Lower strip 47 Ball bearing 48 Through hole 49 Rotating range 50 Internal fixed magnetic pole 51a Fitting groove 51b Fitting Groove 52a Screw hole 52b Screw hole 53 Opening 54a Permanent magnet 54b Permanent magnet 55a Support 55b Support 56a Fitting 56b Fitting 57a Permanent magnet support 57b Permanent magnet support 58a Fitting 58b Fitting 59a Screw Hole 59b Screw hole 60 Case 61a Fitting groove 61b Fitting groove 62a Screw hole 62b Screw hole 63 Nut 64 Ball bearing 65a Screw 65b Screw 66 Stopper 67 Thin portion 68a Contact surface 68b Contact surface 69 Slit 70 Washer 71 Spacer 72 Washer 73 End cap 74a Through-hole 74b Through-hole 74c Through-hole 74d Through-hole 75 Opening portion 76 Step 77 Shaft 78 Base end 79 Front-end 80 Branch point 81 External lead wire 82 External lead wire

Claims (7)

A shaft that is freely rotatable to the left and right;
A coil bobbin provided integrally with the shaft;
A coil formed by winding a metal wire around the coil bobbin;
A first permanent magnet and a second permanent magnet disposed in the vicinity of the shaft;
A rotary solenoid having an internal fixed magnetic pole disposed so as to be interposed between the first permanent magnet and the second permanent magnet;
The coil bobbin includes a first winding frame part and a second winding frame part arranged so that the internal fixed magnetic pole is interposed, and the first winding frame part and the second winding frame part are described above. The shaft is inserted,
The internal fixed magnetic pole is formed with a through hole, and the shaft is inserted into the through hole.   Further, the shaft is fitted into an inner ring, the outer ring is fitted into the through hole of the inner fixed magnetic pole, and the bearing further includes a bearing that rotatably supports the shaft from side to side. Item 2. The rotary solenoid according to Item 1.   The coil is provided such that a part of the filament is opposed to the inner surface and the outer surface of each of the first permanent magnet and the second permanent magnet, and when the coil is energized The current flowing through the portion of the filament facing the inner surface and the outer surface of the first permanent magnet is in the first direction, and on the inner surface and the outer surface of the second permanent magnet of the filament. 3. The rotary solenoid according to claim 1, wherein a current flowing through the facing portion is in a second direction opposite to the first direction. 4.   The coil bobbin has a first opening through which the shaft is inserted into the first winding frame, and a second opening through which a portion of the wire facing the inner surface of these permanent magnets is inserted. And a fourth opening formed by inserting the shaft into the second winding frame, and a portion facing the inner surface of the permanent magnet of the wire of the coil. The rotary solenoid according to claim 3, wherein the fifth opening and the sixth opening are formed. Case and
It is interposed between the first permanent magnet and the second permanent magnet, is fixed to the case and the internal fixed magnetic pole, and supports the first permanent magnet and the second permanent magnet. The rotary solenoid according to any one of claims 1 to 4, further comprising a support. The case is formed such that the groove extends in a direction perpendicular to the inner peripheral surface,
The rotary solenoid according to claim 5, wherein an end of the support is fitted in the groove of the case.   The rotary solenoid according to any one of claims 2 to 6, wherein the bearing is a ball bearing or a needle bearing.

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