JP5382791B2 - Rotary solenoid - Google Patents

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 an internal fixed magnetic pole formed in a substantially cylindrical shape, a bearing fitted to an inner peripheral surface of the internal fixed magnetic pole, and a first shaft configuration that is rotatably provided to the left and right. A shaft having a body and a second shaft constituting body, wherein the vicinity of the center of the first shaft constituting body is supported by the bearing, and a load is connected to the tip side of the second shaft constituting body; And a first connecting portion and a second connecting portion, wherein the first connecting portion is connected to the proximal end side of the first shaft constituting body, and the second connecting portion is the first shaft constituting body. And a coil bobbin interposed between the distal end side of the first shaft constituent body and the proximal end side of the second shaft constituent body. Is a rotary solenoid.

  According to a second aspect of the present invention, in the first aspect of the present invention, the bearing further supports the second shaft structure, and an opening is formed in the center. A rotary solenoid having a fixing member fitted with a bearing and a case formed in a substantially cylindrical shape and fitted with the fixing member in one opening.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the shaft is smaller in diameter than the portion near the center at the proximal end and the distal end portion of the first shaft constituent body. The center portion of the coil bobbin is fitted to the bearing, and the coil bobbin has a hole formed in the first connection portion and a recess formed in the second connection portion. The portion near the distal end of the first shaft constituting body is inserted into the hole of the first connecting portion, and the portion near the proximal end of the second shaft constituting body is inserted into the concave portion of the second connecting portion. It is the rotary solenoid characterized by being made.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the internal fixed magnetic pole has a step portion on the inner peripheral surface, and the bearing has the step difference. The rotary solenoid is in contact with the portion.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects of the present invention, the internal fixed magnetic pole is further disposed so as to be interposed therebetween, and has a substantially circular arc plate shape. A first permanent magnet and a second permanent magnet which are formed so that their inner surfaces face each other and whose magnetization directions are opposite to each other; and a first lateral end of the first permanent magnet And a first support body provided between the first permanent magnet and the second permanent magnet and interposed between the first permanent magnet and the first lateral end of the second permanent magnet. The first permanent magnet and the second permanent magnet are interposed between the second lateral end portion of the first permanent magnet and the second lateral end portion of the second permanent magnet. And a second support member that is bonded to the rotary solenoid.

  The invention according to claim 6 is the invention according to claim 5, wherein the fixing member has two through holes formed in the vicinity of an edge thereof, and the first support body and the second support body are A rotary having a leg portion that abuts against the fixing member, and a protrusion is formed at the tip of each leg, and the protrusion is fitted in each of the two through holes. It is a solenoid.

  The invention according to claim 7 is the invention according to claim 6, further comprising a stopper attached to the leg portion of the first support body and restricting rotation of the coil bobbin. Rotary solenoid.

  According to an eighth aspect of the present invention, in the invention according to any one of the third to sixth aspects, the coil bobbin is disposed near the proximal end of the second shaft structure in the concave portion of the second connection portion. In the state where the part is inserted, the second connecting portion and the second shaft constituting body are connected by screws, which is a rotary solenoid.

  According to the first aspect of the present invention, since the shaft is arranged in the internal space of the internal fixed magnetic pole, it is possible to reduce the size compared to the conventional rotary solenoid in which the fixed magnetic pole and the shaft are arranged separately. Also, a larger torque can be obtained than a conventional rotary solenoid of the same size.

  According to the second aspect of the present invention, since two shaft bearings are provided, swinging during shaft rotation is reduced.

  According to the third aspect of the present invention, the first shaft component is supported by the bearing fitted to the inner peripheral surface of the internal fixed magnetic pole, and the first shaft component and the second shaft are further supported via the coil bobbin. Since the shaft structure is connected, assembly is easy even if the structure is slightly complicated. In addition, since the first shaft structure and the second shaft structure are inserted into the hole and the recess of the coil bobbin and connected to each other, the first shaft structure and the second shaft structure It becomes easy to match the central axis.

  According to the fourth aspect of the present invention, since the bearing can be positioned naturally by press-fitting the bearing into the stepped portion of the internal fixed magnetic pole until it comes into contact, there is no burden of positioning the bearing.

  According to the fifth aspect of the present invention, since the internal fixed magnetic pole and the permanent magnet are supported by the two supports, it is easy to arrange the internal fixed magnetic pole and the permanent magnet at a predetermined distance when the rotary solenoid is assembled. Become. As a result, it is possible to reduce variations in torque and the like for each product.

  According to the sixth aspect of the present invention, the first support body and the second support body are firmly fixed to the fixing member fitted to the case, so that the permanent magnet and the coil bobbin are rotated at the time of rotation by an external impact. Defects such as contact can be reduced.

  According to the seventh aspect of the invention, since the stopper is attached to the first support body, the positioning of the stopper becomes extremely easy during the assembly work of the rotary solenoid.

  According to the eighth aspect of the present invention, since the second shaft constituent body and the coil bobbin are firmly connected, the swinging of the second shaft constituent body during rotation can be reduced.

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 assembly state of the rotary solenoid which concerns on embodiment of this invention. It is a top view of the rotary solenoid which concerns on embodiment of this invention. It is AA sectional view taken on the line of the rotary solenoid in a non-energized state. It is a BB line sectional view of a rotary solenoid in a non-energized state. It is sectional drawing of an internal fixed magnetic pole. It is sectional explanatory drawing of a lower winding frame part, (A) is sectional drawing in a BB line, (B) is sectional drawing in an AA line. It is explanatory drawing of an upper winding frame part, (A) is a top view, (B) is a front view, (C) is a bottom view, (D) is CC sectional view, (E) is a perspective view. . It is a perspective view which shows the assembly state of the component to rotate and an internal fixed magnetic pole. It is a CC line section perspective view of a component and a fixed magnetic pole which rotate. It is a perspective view which shows the assembly state of an internal fixed magnetic pole, a permanent magnet, and a support body. It is a perspective view which shows the electricity supply and rotation direction of a coil.

  Hereinafter, a rotary solenoid according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a rotary solenoid according to an embodiment of the present invention. In FIG. 1, 10 is a rotary solenoid, 20 is a coil, 21 is a first winding part, 22 is a second winding part, 23a, 23b, 24a and 24b are opposing parts, 25a, 25b, 26a and 26b are continuous parts. , 30 is an upper reel portion, 31a, 31b, 31c and 31d are plate-like portions, 32 is a connection portion, 33 is a bottom plate portion, 34a, 34b, 34c and 34d are through holes, 40 is a lower reel portion, 41a, 41b, 41c and 41d are plate-like parts, 42 is a lower connection part, 43 is an upper connection part, 44a, 44b, 44c and 44d are through holes, 48 is a through hole, 49a is a screw hole, 50a, 50b, 50c and 50d. Is a bushing, 51a, 51b, 51c and 51d are pins, 52 is an internal fixed magnetic pole, 53 is a through hole, 55a and 55b are fitting grooves, 56b is a screw hole, 57 is a ball bearing, 58 and 9 is a permanent magnet, 60 is a first shaft constituting body, 61 is a bearing fitting portion, 62a is an inserting portion, 62b is a fitting portion, 63a is an inserting portion, 63b is a fitting portion, and 64 is a second shaft constituting body, 65 is a connecting portion, 66a is an upper shaft portion, 66b is a lower shaft portion, 67 is an annular groove, 68a and 68b are screw holes, 69 is a ball bearing, 70 is a support, 71 is a leg portion, 72 is a fitting groove, 73 is a fitting part, 74 is a fitting part, 75 is a screw hole, 76 is a support body, 77 is a leg part, 78 is a fitting groove, 79 is a fitting part, 80 is a screw hole, 81 is a fitting part, 82a and 82b are stoppers, 83a and 83b are fitting portions, 84 is a base, 85 is an opening, 86 is an annular recess, 87a and 87b are fitting holes, 88 is a screw hole, 89 is a retaining ring, and 90 is a case , 91 are openings, and 92, 93 and 94 are screws. FIG. 2 is a perspective view showing an assembled state of the rotary solenoid according to the embodiment of the present invention. The reference numerals used in FIG. 2 are the same as those in FIG. In addition, about the coil 20, the description of the fine aspect which wound the filament repeatedly in each drawing including FIG. 1 is abbreviate | omitted, and is represented by the general external appearance shape. In addition, description of screw grooves and knurling is also omitted.

  As shown in FIG. 2, the rotary solenoid 10 is housed in a case 90 whose internal structure is substantially cylindrical. The case 90 has an open type structure in which the opening 91 on the upper surface is not closed with an end cap in order to improve heat dissipation. Accordingly, the support 70 and the like are exposed on the upper surface of the rotary solenoid 10. Further, as shown in FIG. 1, the internal structure of the rotary solenoid 10 includes, as rotating components, an upper reel portion 30 and a lower reel portion 40 that constitute a coil bobbin, a coil 20, a first shaft component 60, and a first A shaft composed of a two-shaft structure 64 is provided. Further, as fixed components that generate a rotational force or support a rotating object, an internal fixed magnetic pole 52, permanent magnets 58 and 59, supports 70 and 76, ball bearings 57 and 69, stoppers 82a and 82b, etc. It has. The rotary solenoid 10 may have a dustproof structure by providing an end cap on the upper surface.

  First, the rotating components of the rotary solenoid 10 will be described. The shaft of the rotary solenoid 10 includes a first shaft constituent body 60 and a second shaft constituent body 64. The first shaft component 60 has a bearing fitting portion 61 disposed at the center, an insertion portion 62 a and a fitting portion 62 b provided above the bearing fitting portion 61, and an insertion portion below the bearing fitting portion 61. 63a and a fitting part 63b are provided. Since the bearing fitting portion 61 is fitted to the inner ring of the ball bearing 57 that is a bearing, the first shaft constituting body 60 is supported by the ball bearing 57 so as to be rotatable in the right and left direction. The ball bearing 57 is fitted in the through hole 53 of the internal fixed magnetic pole 52. Accordingly, the first shaft constituting body 60 is provided in a state where most of the first shaft constituting body 60 is inserted into the through hole 53. The insertion part 62 a and the fitting part 62 b have a smaller diameter than the bearing fitting part 61 and are connected to the connection part 32 of the upper reel part 30. The insertion part 63 a and the fitting part 63 b have a smaller diameter than the bearing fitting part 61 and are connected to the upper connection part 43 of the lower winding frame part 40. Further, the fitting portion 62b has a slightly smaller diameter than the insertion portion 62a, and the surface thereof is subjected to press-fitting knurl processing. Similarly, the fitting part 63b is slightly smaller in diameter than the insertion part 63a, and its surface is knurled. Moreover, the insertion part 62a and the insertion part 63a have a function to guide the press-fitting direction when the fitting part 62b and the fitting part 63b are press-fitted. In this embodiment, the diameters of the insertion portion 62a and the insertion portion 63a, and the fitting portion 62b and the fitting portion 63b are the same, but these diameters can be changed as appropriate. Further, the insertion portion 62a and the fitting portion 62b may be omitted when the upper winding frame portion 30 is not provided.

  The second shaft constituting body 64 includes a connection portion 65, and an upper shaft portion 66a and a lower shaft portion 66b that extend downward from the connection portion 65. The connection portion 65 has an upper portion formed on a flat surface, and screw holes 68a and 68b are formed so as to open on the flat surface. Moreover, the lower winding frame part 40 is connected to this flat surface. The positions of the screw holes 68a and 68b are set so that the central axes of the upper shaft portion 66a and the lower shaft portion 66b and the first shaft constituting body 60 coincide with each other. Since the upper shaft portion 66 a is fitted to the inner ring of the ball bearing 69, the second shaft constituting body 64 is supported by the ball bearing 69 so as to be rotatable left and right. Further, the lower shaft portion 66 is a portion that is formed with a surface cut that does not appear in FIG. 1 and is connected to a load device.

  As described above, the first shaft constituting body 60 is interposed between the upper winding frame portion 30 and the lower winding frame portion 40 and is supported by the ball bearing 57. The second shaft constituting body 64 is connected to the lower reel part 40, but is not directly connected to the first shaft constituting body 60. Further, it is supported by a ball bearing 69. Therefore, the first shaft constituting body 60 and the second shaft constituting body 64 constitute one shaft as a whole, but are supported by different bearings and can be separately assembled with respect to the coil bobbin or the like. . Further, since the first shaft constituting body 60 and the second shaft constituting body 64 are supported by different bearings, the rotation of the two shaft constituting bodies, the upper reel portion 30 and the lower reel portion 40 is stable. There is an advantage of doing. Further, since the lower winding frame portion 40 is interposed between the first shaft constituting body 60 and the second shaft constituting body 64, the coil is interposed between the two shaft constituting bodies, that is, the central axis of the shaft is It has a very characteristic structure in which coils are arranged so as to cross. Therefore, it is not necessary to arrange the coil so as to avoid the central axis of the shaft, and it can be said that the structure is more advantageous than the conventional type in terms of power loss.

  8A and 8B are explanatory views of the upper reel part, where FIG. 8A is a plan view, FIG. 8B is a front view, FIG. 8C is a bottom view, FIG. It is a perspective view. In FIG. 8, 33a and 33b are end portions, 35 is a through hole, 35a is a large diameter portion, 35b is a small diameter portion, 36 is a stepped portion, 37a and 37b are protruding portions, 38a and 39b are screw holes, and 39 is a central portion. The other reference numerals are the same as those in FIG.

  The coil bobbin of the rotary solenoid 10 is composed of an upper winding frame portion 30 and a lower winding frame portion 40, and is integrated with the first shaft constituting body 60 as described above. The upper reel part 30 has a connection part 32 to which the first shaft structure 60 is connected. As shown in FIG. 8, the connecting portion 32 is formed with a through hole 35 that is opened in the bottom plate portion 33, and the first shaft constituting body 60 is connected to the through hole 35. That is, the through-hole 35 has an upper portion as a small-diameter portion 35b in which a screw groove (not shown) is formed, a lower portion as a large-diameter portion 35a having a slightly larger diameter than the small-diameter portion 35b, and a boundary between the two as a step portion 36. Yes. After inserting a part of the insertion portion 63a and the fitting portion 62b into the large diameter portion 35a and then press-fitting the fitting portion 62b into the small diameter portion 35b, the upper reel portion 30 and the first shaft constituting body 60 are connected. The

  The bottom plate portion 33 becomes a winding frame when the wire is wound to form the second winding portion 22 of the coil. That is, the continuous portion 26a of the second winding portion 22 shown in FIG. 1 is a wire wound around the surface of the bottom plate portion 33, and the facing portion 24a and the facing portion 24b are the end portion 33a of the bottom plate portion 33 and This is a portion extending from 33 b toward the lower reel portion 40. In addition, a plate-like portion rises from two edges of the bottom plate portion 33. The plate-like portion 31a, the plate-like portion 31b, the plate-like portion 31c, and the plate-like portion 31d are provided so as to extend in parallel with each other in the horizontal direction. Further, a support portion for supporting the filament when winding the first winding portion 21 is provided between them. Accordingly, the second winding portion 22 is provided in contact with the surface of the bottom plate portion 33, whereas the first winding portion 21 is provided so as to be bridged between the two support portions. A line part will be in the separated state. In FIG. 8, the plate-like portion 31a and the plate-like portion 31c, and the plate-like portion 31b and the plate-like portion 31d are respectively continuous plate-like portions, but may be separated from each other. That is, the plate-like portions 31a, 31b, 31c, and 31d may be provided separately from each other without providing the plate-like portion near the central portion 39. Further, a holding portion for holding an end portion of the coil, a wiring board, and the like, a locking portion, a storage portion, and the like may be appropriately provided in the vicinity of the central portion 39. In addition, when forming the coil 20 by a rectangular wire, since the rigidity of each part of the coil 20 becomes high, it is also possible to omit the upper winding frame part 30.

  7A and 7B are cross-sectional explanatory views of the lower reel portion, where FIG. 7A is a cross-sectional view taken along the line BB, and FIG. 7B is a cross-sectional view taken along the line A-A. 42a is a concave portion, 45 is a bottom plate portion, 45a and 45b are end portions, 46 is a groove, 47 is a stepped portion, 48a is a large diameter portion, 48b is a small diameter portion, 49b is a screw hole, and other symbols are as in FIG. Indicates the same thing.

  The lower winding frame part 40 is provided with an upper connection part 43 that connects the first shaft constituting body 60 and a lower connection part 42 that connects the second shaft constituting body 64. The lower connection portion 42 is formed in a substantially disk shape, and an upper connection portion 43 is formed at the center so as to rise. Further, the plate-like portion 41a and the plate-like portion 41b, and the plate-like portion 41c and the plate-like portion 41d are formed to extend in parallel from the side. Further, a circular recess 42 a is formed on the lower surface of the lower connection portion 42. The screw holes 49a and 49b and the screw holes 68a and 68b are fastened with screws 92 in a state where the connection portion 65 of the second shaft constituting body 64 shown in FIG. . The area of the connection surface of the lower connection portion 42 and the connection portion 65 is considerably larger than the area of the cross section in the orthogonal direction of the upper connection portion 43 and the upper shaft portion 66a. The swinging (swinging) of the frame part 40 can be greatly reduced. Furthermore, since the connection surfaces of the lower connection portion 42 and the connection portion 65 are substantially circular, the lower winding frame portion 40 tends to be inclined (swing) in a specific direction, for example, when the connection surface is rectangular. Absent. The through hole 48 of the upper connecting portion 43 has a large diameter portion 48a at the top and a small diameter portion 48b at the bottom. By press-fitting the fitting portion 63b of the first shaft constituent body 60 into the small diameter portion 48b, the insertion portion 63a enters the large diameter portion 48a, and the lower reel portion 40 and the first shaft constituent body 60 are connected. Is done. The small diameter portion 48 b penetrates the bottom plate portion 45.

  The through hole 48 of the upper connecting portion 43 has a large diameter portion 48a at the top and a small diameter portion 48b at the bottom. By fitting the fitting portion 63b of the first shaft constituting body 60 into the small diameter portion 48b, the insertion portion 63a enters the large diameter portion 48a, and the lower reel portion 40 and the first shaft constituting body 60 are brought into contact with each other. Connected. The small diameter portion 48 b penetrates the bottom plate portion 45. As described above, the first shaft constituting body 60 and the second shaft constituting body 64 are connected after being inserted into the through hole 48 of the upper connecting portion 43 and the concave portion 42a of the lower connecting portion 42. There is an advantage that it becomes very easy to match the central axes of the shaft structure 60 and the second shaft structure 64. Further, the recess 42a is formed as a recess considerably shallower than the through hole 48, and the portion inserted into the recess 42a of the second shaft constituting body 64 is a very small portion as viewed from the whole. Therefore, compared with the case where it forms as a deep hole like the through-hole 48, for example, the part to insert can be shortened very much, the total length of the 2nd shaft structure 64 is made minimum necessary, and also the rotary solenoid 10 is extended. The total length can be minimized.

  Further, as shown in FIG. 7A, the lower reel frame portion 40 has a groove 46 formed so that the upper and lower sides are inverted so as to extend upward from the lower surface of the lower connection portion 42, that is, the bottom is located above. ing. The groove 46 is formed in order to dispose a part of the coil between the lower winding frame part 40 and the second shaft constituting body 64. That is, the continuous portion 26b of the second winding portion 22 shown in FIG. 1 is a filament wound around the bottom plate portion 45 that is the bottom of the groove 46, and the facing portion 24a and the facing portion 24b are This is a portion extending from the end portions 45 a and 45 b toward the upper reel unit 30. The inner surface of the plate-like portion 41 a and the plate-like portion 41 b and the inner surface of the plate-like portion 41 c and the plate-like portion 41 d are formed so as to be continuous with the side surface of the groove 46. Moreover, the support part which supports a filament when winding the 1st coil | winding part 21 between these is provided. Accordingly, the second winding portion 22 is provided in contact with the surface of the bottom plate portion 45, whereas the first winding portion 21 is provided so as to be bridged between the two support portions. A line part will be in the separated state. As described above, by forming the groove 46 in the lower winding frame part 40, the first winding part 21 and the second winding part 22 are placed between the lower winding frame part 40 and the second shaft constituting body 64. In addition, the first shaft constituting body 60 and the second shaft constituting body 64 can be arranged so as to be orthogonal to the central axis.

  As shown in FIG. 1, the coil 20 includes two winding portions, a first winding portion 21 and a second winding portion 22. Both the first winding portion 21 and the second winding portion 22 are formed in a substantially rectangular frame shape. Further, the first winding portion 21 is formed to be slightly wider than the second winding portion 22 in terms of the distance and arrangement with respect to the permanent magnets 58 and 59. Further, since the shaft is composed of the first shaft constituting body 60 and the second shaft constituting body 64, as described above, the first winding portion 21 and the second winding portion 22 are orthogonal to the central axis of the shaft. ing. In a general rotary solenoid, when the filament is arranged so as to be orthogonal to the central axis of the shaft, the central axis of the shaft is bypassed. Since it becomes longer, power loss and heat generation also increase according to the amount of detour. Therefore, the configuration of the rotary solenoid 10 of the present invention can reduce power loss and heat generation, and can be said to be a major feature of the rotary solenoid 10.

  Moreover, the 1st coil | winding part 21 and the 2nd coil | winding part 22 wind the copper wire strip called a coil wire around the upper winding frame part 30 and the lower winding frame part 40 with the winding machine. In this embodiment, the rectangular wire is wound in a so-called edgewise winding so that the short side face thereof is oriented in the horizontal direction and the long side face thereof is directed in the vertical direction. By winding the flat wire in this manner, the shape after bending is well maintained, and the arrangement of the wire hardly breaks in the curved portion. Therefore, the upper reel portion 30 can be omitted in a small and flat rotary solenoid or the like. However, when the upper reel portion 30 is omitted, a jig for assisting winding is required when winding the filament. Further, since the space factor is higher than that of the round wire, there is an advantage that a space necessary for arranging the coils can be reduced and heat dissipation is better than that of the round wire. In addition, you may form the coil 20 by a round wire. Further, the first winding portion 21 and the second winding portion 22 may be a single winding, or a current is separately supplied to these winding portions, and either one is turned on or both. May be turned on so that a two-stage torque can be obtained. Furthermore, if the first winding part 21 and the second winding part 22 have different numbers of turns, three stages of torque can be obtained. Depending on the magnitude of the required torque, either the first winding part 21 or the second winding part 22 can be omitted.

  In the first winding portion 21, the right vertical portion is a facing portion 23a, the left vertical portion is a facing portion 23b, the upper horizontal portion is a continuous portion 25a, and the lower horizontal portion is a continuous portion 25b. Accordingly, the facing portions 23 a and 23 b are provided so as to face the outer surface of the permanent magnet 58 and the outer surface of the permanent magnet 59 with a slight gap. Therefore, when the coil 20 is energized, a Lorentz force is generated between the facing portions 23a and 23b and the permanent magnets 58 and 59, and the coil 20 is rotated to the left or right. The continuous portions 25a and 25b serve as a current flow path when the coil 20 is energized, and do not provide a force for rotating the coil 20 unlike the facing portions 23a and 23b. Therefore, by making the continuous portions 25a and 25b into flat plate shapes, the current path length between the facing portion 23a and the facing portion 23b is made as short as possible to reduce power loss and unnecessary heat generation.

  Similarly to the first winding part 21, the second winding part 22 has a right vertical part as a facing part 24a, a left vertical part as a facing part 24b, an upper horizontal part as a continuous part 26a, and a lower horizontal part. Is a continuous portion 26b. The facing portions 24a and 24b are provided to face the inner side surface of the permanent magnet 58 and the inner side surface of the permanent magnet 59 with a slight gap. Therefore, when the coil 20 is energized, a Lorentz force is generated between the facing portions 23a and 23b and the permanent magnets 58 and 59, and the coil 20 is rotated to the left or right. The continuous portions 26a and 26b, like the first winding portion 21, are designed to have a flat plate shape to reduce power loss. Further, the facing portion 23a facing the outer surface of the permanent magnet 58 and the facing portion 24a facing the inner surface are configured so that current flows in the same direction. Further, the facing portion 23b facing the outer surface of the permanent magnet 58 and the facing portion 24b facing the inner surface are configured such that current flows in the opposite direction to the facing portion 23a and the facing portion 24a.

  These winding portions are formed in the order of the second winding portion 22 and the first winding portion 21. That is, after the upper reel portion 30 and the lower reel portion 40 are integrated with the first shaft constituting body 60, around the bottom plate portion 33 of the upper reel portion 30 and the bottom plate portion 45 of the lower reel portion 40, The filament which becomes the 2nd winding part 22 is wound. The bushings 50a, 50b, 50c, and 50d are held between the through hole 34a and the through hole 34b, the through hole 34c and the through hole 34d, the through hole 44a and the through hole 44b, and the through hole 44c and the through hole 44d, respectively. The pins 51a, 51b, 51c, and 51d are inserted so as to penetrate these opposing through-holes to form support portions for the four windings. Next, the bushing 50a, 50b, 50c, and 50d are formed by winding the wire used as the 1st coil | winding part 21 by predetermined times.

  FIG. 9 is a perspective view showing an assembled state of rotating components and internal fixed magnetic poles. Reference numerals in FIG. 9 are the same as those in FIG. FIG. 10 is a cross-sectional perspective view taken along the line CC of the rotating component and the internal fixed magnetic pole. The reference numerals in FIG. 10 are the same as those in FIG.

  As described above, some rotating components of the rotary solenoid 10 are arranged so as to substantially surround the internal fixed magnetic pole 52. That is, as shown in FIG. 9, the permanent magnets 58 and 59 and the four opposing parts including the opposing part 23a are arranged so as to surround the peripheral side surface of the internal fixed magnetic pole 52. Further, four continuous parts including the upper reel part 30, the lower reel part 40, and the continuous part 26a are arranged above and below the internal fixed magnetic pole 52. Further, a ball bearing 57 and a part of the first shaft constituting body 60 and the second shaft constituting body 64 are arranged on the inner peripheral surface of the inner fixed magnetic pole 52 formed in a substantially cylindrical shape. Therefore, the internal fixed magnetic pole 52 has a very complicated structure in which rotating components are also arranged on the inner peripheral surface side. Therefore, a support body to be described later is disposed in the gap between the permanent magnet 58 and the permanent magnet 59, and the internal fixed magnetic pole 52 is supported by this support body.

  Further, as shown in FIG. 10, the continuous portion 25 a and the continuous portion 26 a, and the continuous portion 25 b and the continuous portion 26 b are arranged vertically at a predetermined distance from each other, but form the first winding portion 21. The wire is wound around the bushings 50a, 50b, 50c and 50d, and the wire forming the second winding portion 22 is wound around the bottom plate portion 33 and the bottom plate portion 45. It can be held at a predetermined distance.

  Next, energization to the coil 20 and the direction of rotation will be described. FIG. 12 is a perspective view showing the energization and rotation direction of the coil. 12, 28a, 28b, 28c and 28d are current directions, 29a and 29b are rotational directions, and the other symbols are the same as those in FIG.

  First, when the coil 20 is not energized, the facing portion 23a and the facing portion 24a of the coil 20 and the facing portion 23b and the facing portion 24b are stationary near the center of the permanent magnet 58 and the permanent magnet 59, respectively. It shall be. Here, when the coil 20 is energized, as shown in the current directions 28a, 28b, 28c, and 28d in FIG. Also, a magnetic circuit is generated around the permanent magnets 58 and 59, the internal fixed magnetic pole 52, the base 84, and the case 90.

  Then, the force in the direction in which the right-handed screw advances with respect to the current flowing through the facing portion 23a and the facing portion 24a, and the facing portion 23b and the facing portion 24b, that is, the Lorentz force that tries to move the flow of charged particles, Are moved in the direction of the rotation direction 29a of FIG. Then, as the coil 20 rotates, the upper and lower winding frame portions 30 and 40 constituting the coil bobbin, and the first shaft constituting body 60 and the second shaft constituting body 64 constituting the shaft also rotate. Then, when the plate-like portion 41a of the lower winding frame portion 40 comes into contact with the stopper 82a of FIG. 1, it stops at that position.

  In a state where the rotation is stopped, this time, when current is passed in the direction opposite to the current direction 28a, 28b, 28c and 28d, the Lorentz force causes the facing portion 23a and the facing portion 24a, and the facing portion 23b and the facing portion 24b. Move in rotation direction 29b. Then. As the coil 20 rotates, the coil bobbin and the like also rotate in the reverse direction. When the plate-like portion 41c comes into contact with the stopper 82b, the stopper stops at that position.

  In addition, when rotating the upper winding frame part 30 and the lower winding frame part 40 etc. reversely, you may employ | adopt means other than the means to send an electric current to a reverse direction. For example, the upper reel portion 30 and the lower reel portion 40 may be reversely rotated by mechanical means such as a helical spring provided inside or outside the case 90. In this way, when the coil 20 is de-energized when the upper reel portion 30 and the lower reel portion 40 are rotated to a predetermined angle, the upper reel portion 30 and the lower reel portion 30 and the lower reel portion are actuated by means of means such as a helical spring. The reel 40 or the like operates so as to return to the original angle.

  Further, fixed components of the rotary solenoid 10 will be described. FIG. 3 is a plan view of the rotary solenoid according to the embodiment of the present invention. FIG. 4 is a cross-sectional view taken along line AA of the rotary solenoid in a non-energized state. In addition, FIG. 5 is a cross-sectional view of the rotary solenoid in the non-energized state along the line BB. Reference numerals in FIGS. 3, 4 and 5 are the same as those in FIG. In FIG. 4 and FIG. 5, hatching is omitted. FIG. 6 is a cross-sectional view of the internal fixed magnetic pole. In FIG. 6, 53a is a large diameter part, 53b is a small diameter part, 54 is a level | step difference part, 56a is a screw hole, The other code | symbol shows the same thing as FIG.

  As shown in FIG. 1, the internal fixed magnetic pole 52 is formed in a substantially cylindrical shape, and a through hole 53 is formed in the center thereof to fit a ball bearing 57. As shown in FIG. 6, the through hole 53 has a small diameter portion 53 b having a slightly smaller diameter on the lower side with respect to the large diameter portion 53 a on the upper side. The ball bearing 57 is press-fitted from the large-diameter portion 53a side, but is pushed in until it comes into contact with the stepped portion 54 that is a boundary between the large-diameter portion 53a and the small-diameter portion 53b. Therefore, it is very easy to press-fit the ball bearing 57 to a predetermined position. The upper side may be a small diameter part having a slightly smaller diameter, and the ball bearing 57 may be press-fitted from the lower side. Further, the inner fixed magnetic pole 52 has fitting grooves 55a and 55b formed on the outer peripheral surface thereof so as to face each other. The fitting groove 55a and the fitting groove 55b are formed to fix the internal fixed magnetic pole 52 by fitting the fitting portion 73 of the support 70 and the fitting portion 79 of the support 76. Furthermore, screw holes 56a and 56b are formed so that the support 70 and the support 76 can be screwed.

  The ball bearing 57 has an outer ring fitted in the through hole 53 of the internal fixed magnetic pole 52, and a bearing fitting portion 61 of the first shaft constituting body 60 is fitted to the inner ring. The ball bearing 69 has an outer ring fitted in the opening 85 of the base 84, and an upper shaft portion 66a of the second shaft constituting body 68 is fitted in the inner ring. As described above, the first shaft constituting body 60 and the second shaft constituting body 68 are structured to be supported by different bearings, so that sufficient stability during rotation of the rotary solenoid 10 can be ensured. . As these bearings, needle bearings, dry bearings, and the like can be appropriately employed according to the size of the rotary solenoid 10 and the required torque.

  The base 84 is a fixed member for fixing the internal fixed magnetic pole 52 and is also a fixed magnetic pole for configuring a magnetic circuit. As shown in FIG. 1, it is formed in a substantially disk shape, and an opening 85 is formed at the center thereof, and is fitted into the lower opening of the case 90. Further, an outer ring of a ball bearing 69 is fitted into the opening 85. Further, fitting holes 87 a and 87 b are formed around the opening 85. The fitting holes 87a and 87b can be easily positioned by fitting the fitting part 74 of the support 70 and the fitting part 81 of the support 76 lightly into them. Is formed. Further, in order to screw the support body 70 and the support body 76, screw holes that have a smaller diameter than these holes and penetrate to the lower surface of the base 84 are formed inside the fitting holes 87a and 87b. 88a and screw hole 88b are formed. In addition, the annular recess 86 is formed by shaving the periphery of the opening 85 shallowly. As shown in FIG. 4, the annular recess 86 is formed in order to ensure a sufficient gap between the base 84 and the connection portion 65 of the second shaft constituting body 64 in the assembled state of the rotary solenoid 10. Therefore, even when the dimensional accuracy of the parts is not so high, it is possible to prevent the base 84 and the connection portion 65 from contacting each other.

  As shown in FIG. 1, the permanent magnet 58 and the permanent magnet 59 are formed in a substantially arc plate shape, and their magnetization directions are reversed. That is, the permanent magnet 58 is magnetized so that the outer surface is on the S pole side and the inner side surface is on the N pole side, and the permanent magnet 59 is on the N pole side and the inner side surface is on the S pole side. Magnetized. By magnetizing in this way, when a current in the direction shown in FIG. 13 is passed through the coil 20, the coil 20 is placed between the permanent magnet 58 and the permanent magnet 59 and the opposing portions 23a, 23b, 24a and 24b. Generate Lorentz force that rotates in the same direction. In addition, it is desirable that the magnetization direction of the permanent magnet 58 and the permanent magnet 59 is a direction that spreads radially from the center of curvature of each outer surface or inner surface or converges to the center of curvature.

  The supports 70 and 76 have a function of supporting the permanent magnets 58 and 59 and the internal fixed magnetic pole 52. That is, the support body 70 is formed by screwing the screws 94 into the screw holes 88a and 75 in the state where the fitting portion 74 at the tip of the leg portion 71 is lightly fitted into the fitting hole 87a of the base 84. 84 is fixed. Similarly, the support 76 is formed by screwing a screw 94 into the screw hole 88b and the screw hole 80 in a state where the fitting portion 81 at the tip of the leg 77 is lightly fitted into the fitting hole 87b of the base 84. It is fixed to the base 84. Further, as shown in FIG. 3, the fitting portion 73 of the support body 70 and the fitting portion 79 of the support body 76 are fitted into the fitting groove 55a and the fitting groove 55b of the internal fixed magnetic pole 52, respectively. Then, screws 93 are screwed into the screw holes 56a and 56b and fixed as shown in FIG. Further, in a state where the supports 70 and 76 are fixed to the base 84, the permanent magnet 58 and the permanent magnet 59 are inserted between the ends of the support 70 and the support 76 and fixed with an adhesive.

  FIG. 11 is a perspective view showing an assembled state of the internal fixed magnetic pole, the permanent magnet, and the support. Reference numerals in FIG. 11 are the same as those in FIG. As described above, in the state where the rotary solenoid 10 is assembled, the supports 70 and 76 have the fitting portion 73 and the fitting portion 79 fitted in the fitting groove 55a and the fitting groove 55b, and the two are in close contact with each other. doing. The permanent magnets 58 and 59 are bonded in a state where both end portions are in contact with the supports 70 and 76. Therefore, since the gap between the internal fixed magnetic pole 52 and the permanent magnets 58 and 59 can be ensured with high accuracy, the facing portion 24a and the facing portion 24b of the second winding portion 22 inserted through the gap are permanently The gap between the magnets 58 and 59 can also be maintained with high accuracy. By the way, if the permanent magnets 58 and 59 are lengthened in the circumferential direction by narrowing the gap between the permanent magnet 58 and the permanent magnet 59, the rotation angle of the upper reel portion 30 and the lower reel portion 40 is at most close to 180 degrees. Can be secured. When the rotation angle of the upper reel portion 30 and the lower reel portion 40 is close to 180 degrees, the widths of the supports 70 and 76 may be narrowed. Sufficient strength must be secured.

  The stoppers 82a and 82b have a function of restricting the rotation of the coil bobbin 11. That is, when the lower winding frame portion 40 rotates counterclockwise by a certain angle, the plate-like portion 41a of the lower winding frame portion 40 comes into contact with the stopper 82a and stops rotating. Further, when the lower reel portion 40 rotates to the right by a certain angle, the plate-like portion 41c of the lower reel portion 40 comes into contact with the stopper 82b and stops rotating. Further, the stopper 82a and the stopper 82b are inserted into a fitting groove 83a (not shown) on the surface opposite to the fitting groove 72 of the support 70 before the support 70 is fixed to the base 84. And the fitting part 83b are attached to the support body 70 by inserting them from below. Since the support 76 is also formed with an insertion groove (not shown) on the opposite side of the insertion groove 78, stoppers 82 a and 82 b may be attached to the support 76.

  The retaining ring 89 prevents the second shaft constituent body 64 from rattling to the first shaft constituent body 60 side (upward). The retaining ring 89 is attached to an annular groove 67 formed at the boundary between the upper shaft portion 66a and the lower shaft portion 66b of the second shaft constituting body 64. As shown in FIGS. 4 and 5, the retaining ring 89 attached to the annular groove 67 is located at a position very close to the ball bearing 69.

  As described above, in the rotary solenoid 10 according to this embodiment, the facing portion 23a and the facing portion 24a of the coil 20 connect the outer surface and the inner surface of the permanent magnet 58, and the facing portion 23b and the facing portion 24b. Is positioned so as to sandwich the outer side surface and the inner side surface of the permanent magnet 59, and the coil 20 current is allowed to flow in this state. Since Lorentz force acts on both the outer side and inner side coils of the permanent magnets 58 and 59, a gap (air gap) is provided in a part of the magnetic circuit so that the gap is filled when energized. It is more efficient than a rotary solenoid that rotates. As a result, size reduction becomes easier than such a rotary solenoid. Further, the lower winding frame portion 40 is interposed between the first shaft constituting body 60 and the second shaft constituting body 64, and a part of the coil 20 is the center of the first shaft constituting body 60 and the second shaft constituting body 64. Since it is arranged so as to be orthogonal to the axis, it is not necessary to arrange the coil 20 so as to bypass the first shaft constituting body 60 and the second shaft constituting body 64, thereby reducing power loss and unnecessary heat generation. it can. Further, since the shaft is composed of the first shaft constituting body 60 and the second shaft constituting body 64, the structure is complicated in that a coil, a coil bobbin, and a permanent magnet are arranged around the inner fixed magnetic pole 52. However, assembly is easy. In addition, when the coil is formed of a rectangular wire, the upper winding frame portion 30 can be omitted, so that the weight can be reduced. Furthermore, when the upper reel unit 30 is omitted, a space above the case 90 is used as a storage space, and devices such as wiring and magnetic sensors can be stored.

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

DESCRIPTION OF SYMBOLS 10 Rotary solenoid 20 Coil 21 Winding part 22 Winding part 23a Opposing part 23b Opposing part 24a Opposing part 24b Opposing part 25a Continuous part 25b Continuous part 26a Continuous part 26b Continuous part 27 Line 28a Current direction 28b Current direction 28c Current direction 28d Current direction 29a Rotation direction 29b Rotation direction 30 Upper reel portion 31a Plate portion 31b Plate portion 31c Plate portion 31d Plate portion 32 Connection portion 33 Bottom plate portion 33a End portion 33b End portion 34a Through hole 34b Through hole 34c Through hole 34d Through-hole 35 Through-hole 35a Large-diameter portion 35b Small-diameter portion 36 Step portion 37a Projection portion 37b Projection portion 38a Screw hole 39b Screw hole 39 Central portion 40 Lower winding frame portion 41a Plate-like portion 41b Plate-like portion 41c Plate-like portion 41d Plate Lower part 42a Recess 43 Upper connection part 44a Through hole 44b Through hole 44c Through hole 44 d Through hole 45 Bottom plate part 45a End part 45b End part 46 Groove 48 Through hole 48a Large diameter part 48b Small diameter part 49a Screw hole 49b Screw hole 50a Bushing 50b Bushing 50c Bushing 50d Bushing 51a Pin 51b Pin 51c Pin 51d Pin 52 Internal fixed magnetic pole 53 Through-hole 53a Large diameter part 53b Small diameter part 54 Step part 55a Fitting groove 55b Fitting groove 56a Screw hole 56b Screw hole 57 Ball bearing 58 Permanent magnet 59 Permanent magnet 60 Shaft component 61 Bearing fitting part 62a Insertion part 62b Fitting Joint portion 63a Insertion portion 63b Fitting portion 64 Shaft constituent body 65 Connection portion 66 Lower shaft portion 66a Upper shaft portion 66b Lower shaft portion 67 Annular groove 68 Shaft constituent body 68a Screw hole 68b Screw hole 69 Ball bearing 70 Support body 71 Leg portion 72 Fitting groove 73 Fitting part 74 Fitting part 5 screw hole 76 support body 77 leg part 78 fitting groove 79 fitting part 80 screw hole 81 fitting part 82a stopper 82b stopper 83 permanent magnet 83a fitting part 83b fitting part 84 base 85 opening part 86 annular recess 87a fitting Joint hole 87b Fitting hole 88a Screw hole 88b Screw hole 89 Retaining ring 90 Case 91 Opening portion 92 Screw 93 Screw 94 Screw

Claims (7)

An internal fixed magnetic pole formed in a substantially cylindrical shape;
A bearing fitted to the inner peripheral surface of the internal fixed magnetic pole;
A first shaft constituent body and a second shaft constituent body provided so as to be freely rotatable to the left and right; the vicinity of the center of the first shaft constituent body is supported by the bearing; A shaft designed to connect a load to the tip side;
A first connecting portion and a second connecting portion, wherein the first connecting portion is connected to a proximal end side of the first shaft constituting body, and the second connecting portion is connected to the first shaft constituting body; And a coil bobbin interposed between the second shaft constituent body and connected to a distal end side of the first shaft constituent body and a proximal end side of the second shaft constituent body. Rotary solenoid. And another bearing that supports the second shaft structure;
A fixing member in which an opening is formed in the center and the other bearing is fitted in the opening;
The rotary solenoid according to claim 1, further comprising a case formed in a substantially cylindrical shape and having the fixing member fitted in one opening. The shaft is formed such that the proximal end and the distal end portion of the first shaft constituting body are reduced in diameter than the portion near the center, and the portion near the center is fitted to the bearing,
In the coil bobbin, a hole is formed in the first connection portion, a recess is formed in the second connection portion, and a hole near the tip of the first shaft structure is formed in the hole of the first connection portion. 3. The rotary solenoid according to claim 2 , wherein a portion is inserted, and a portion near the proximal end of the second shaft constituting body is inserted into the concave portion of the second connection portion. The internal fixed magnetic pole has a step portion on the inner peripheral surface,
The rotary solenoid according to claim 2 , wherein the bearing is in contact with the stepped portion. Furthermore, the internal fixed magnetic pole is disposed so as to be interposed therebetween, is formed in a substantially arc plate shape, the inner side surfaces thereof are opposed to each other, and the magnetization direction is reversed. A permanent magnet and a second permanent magnet,
Interposed between the first lateral end of the first permanent magnet and the first lateral end of the second permanent magnet, and the first permanent magnet and the second permanent magnet; A first support provided by bonding; a second lateral end of the first permanent magnet; and a second lateral end of the second permanent magnet; and The rotary solenoid according to any one of claims 2 to 4, further comprising: a first permanent magnet and a second support body provided by being bonded to the second permanent magnet. The fixing member has two through holes formed in the vicinity of the edge,
The first support body and the second support body each include a leg portion that comes into contact with the fixing member, and a protrusion portion is formed at the tip of each of the leg portions. The rotary solenoid according to claim 5, wherein the rotary solenoid is fitted in each of the through holes.   The rotary solenoid according to claim 6, further comprising a stopper attached to the leg portion of the first support body and restricting rotation of the coil bobbin.

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