JPH0743723U - Rotary solenoid - Google Patents

Abstract

(57) [Abstract] [Purpose] Aiming at easy assembly, the manufacturing cost is greatly reduced and the assembly precision is improved to achieve high quality. [Structure] A pair of E-shaped magnetic paths 11, 1 made of a soft magnetic material
The end faces 13, 13 of the outer both leg portions 12, 12 of 1 are combined so as to be opposed to each other and closely adhere to each other, and the central leg portions are constituted as the magnetic poles 14, 14 opposed to each other, and the outer both leg portions are constituted as the yokes 12, 12. Together with the yokes 12, 12 facing each other
In this case, cutout recesses 22, 22 are formed so as to extend over the respective yokes 12, 12, and both end surfaces 11s ..., 11 of the E-shaped magnetic paths 11, 11 are formed.
s ... is fitted in the notch recesses 22, 22, and the magnetic poles 14,
Protrusions 23 provided in a positional relationship that fits on both sides of 14,
It is configured by being sandwiched by a pair of frames 18 having 23 ...

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of a rotary solenoid.

[0002]

[Prior art]

 Conventionally, as a rotary solenoid, as shown in the cross-sectional view of FIG. 13, opposing magnetic poles 51, 51 made of a soft magnetic material are fixed by yokes 52, 52 made of a soft magnetic material. , 51 in which permanent magnet rotors 53 (N and S are their magnetic poles) are rotatably supported, and rotary solenoids composed of coils 54 and 54 wound around the opposing magnetic poles 51 and 51. Alternatively, as shown in the lateral sectional view of FIG. 9 and the side sectional view of FIG. 10, the opposing magnetic poles 61, 61 made of a soft magnetic material are fixed by the frames 62, 62 made of a non-magnetic material to face each other. A permanent magnet rotor 63 (N and S are their magnetic poles) is rotatably supported in the magnetic poles 61 and 61 by a rotating shaft 64 and a bearing 65, and a coil 67 preliminarily wound around a bobbin 66 is made of a soft magnetic material. Insert York 68 , A rotary solenoid having both ends thereof fixed to the projecting portions 69, 69 of the magnetic poles 61, 61 facing each other with machine screws 70, and further, as shown in the front view of FIG. 12 and the side view of FIG. Protrusions 69, 69 and 71, 71 are provided on both sides of the opposite magnetic poles 61, 61 made of a soft magnetic material, and a coil 67 wound in advance on the bobbin 66 and an auxiliary yoke 68 made of a soft magnetic material are respectively provided. Using two pieces, the both ends of the auxiliary yokes 68, 68 are screwed to the projecting portions 69, 69 and 71, 71 of the magnetic poles 61, 61 facing each other with machine screws 70, respectively. Known 62, 62, 64, 65 and 65 are rotary solenoids and the like having the same configurations as those in FIGS.

[0003]

[Problems to be solved by the device]

 However, the conventional rotary solenoid described above has the following problems. First, in the rotary solenoid shown in FIG. 13, a special winding machine must be used to wind the coil 54. On the other hand, in the rotary solenoid shown in FIGS. 9 and 10, there is no need to use a special winding machine to wind the coil 67, and the advantages such as easy winding and miniaturization of the rotary solenoid are provided. However, the magnetic flux leaks from the magnetically open ends 72, 72 of the magnetic poles 61, 61 facing each other, which adversely affects the external environment and reduces the rotating torque generated in the permanent magnet rotor 63. Further, in the rotary solenoid shown in FIGS. 11 and 12, since the magnetically open end is eliminated, the above-mentioned drawbacks are eliminated, but the length in the vertical direction becomes redundant in the figures.

On the other hand, in order to solve such a problem, for example, in the field of motors, a pair of E-shaped magnetic paths are combined so that the end faces of both outer leg portions are opposed to each other and are in close contact with each other, and the central leg portion is The outer magnetic poles are opposed to each other, and the outer legs are formed as a yoke. In the space between the outer leg and the central leg, a coil wound in advance outside is inserted so as to surround the magnetic poles, and the magnetic poles facing each other are formed. There is also known a structure in which a permanent magnet rotor is rotatably supported by a rotating shaft and a bearing (see JP-A-49-25405).

However, such a conventional structure requires a pair of E-shaped magnetic paths to be in close contact with each other. However, since the whole assembly is not easy, the manufacturing cost increases and the assembly accuracy cannot be improved. There was a problem.

The present invention solves the problems existing in such conventional techniques. It is possible to significantly reduce the manufacturing cost by facilitating the assembly and to improve the quality by improving the assembling accuracy. The object is to provide a rotary solenoid that can be used.

[0007]

[Means for Solving the Problems]

 In the rotary solenoid according to the present invention, a pair of E-shaped magnetic paths 11, 11 made of a soft magnetic material are assembled so that the outer end portions 12, 12 of the outer leg portions 12, 12 face each other and are in close contact with each other. The magnetic poles 14 and 14 are opposed to each other, and the outer leg portions are configured as yokes 12 and 12. The outer leg portions 12 and 12 and the central leg portions 14 and 14 are preliminarily wound externally in the spaces 17 and 17. The coils 16 and 16 are inserted so as to go around the magnetic poles 14 and 14, and the permanent magnet rotor 20 is rotatably supported by the rotating shaft 21 and the bearings 19 and 19 in the magnetic poles 14 and 14 facing each other. At the same time, the yokes 12, 12 facing each other are formed with the notch recesses 22, 22 extending over the respective yokes 12, 12, and the both end faces 11s ..., 11s ... Of the E-shaped magnetic paths 11, 11 are provided with the notch recesses 22, 22 and magnetic Projection 23 provided in a positional relationship to be fitted on either side of the 14, 14, you characterized by being configured to sandwich a pair of frames 18 and 18 with 23 ....

In this case, according to the optimum embodiment, the pair of E-shaped magnetic paths 11 and 11 are closely attached by the leaf springs 24 and 24 which are engaged with the grooves provided in the E-shaped magnetic paths 11 and 11. The pair of frames 18 and 18 are fixed to the E-shaped magnetic paths 11 and 11 by fixing screws M and M which are inserted into the spaces 17 and 17, and each of the frames 18 and 18 includes one of coils 16 and 16. There are provided accommodating parts P, P in which the parts are accommodated. On the other hand, the facing surfaces of the magnetic poles 14 and 14 are each formed into a semi-circular concave surface, and the permanent magnet rotor 20 has the circumferential surfaces facing each other 180 degrees of the cylinder D cut, and the remaining circumferential surface sides are respectively S poles. And the N pole, and are arranged in a predetermined positional relationship with respect to the magnetic poles 14, 14.

[0009]

[Action]

 According to the rotary solenoid of the present invention, the end faces 13 and 13 of the pair of E-shaped magnetic paths 11 and 11 facing each other on the outer leg portions 12 and 12 are closely joined to each other. In this case, for example, according to the optimum embodiment, the pair of E-shaped magnetic paths 11, 11 are tightly sealed by the leaf springs 24, 24 which are engaged with the grooves provided in the E-shaped magnetic paths 11, 11.

On the other hand, both end faces 11s ..., 11s ... Of the E-shaped magnetic paths 11, 11 are sandwiched by a pair of frames 18, 18. At this time, the yokes 12, 12 facing each other are formed with cutout recesses 22, 22 extending over the respective yokes 12, 12, while the frames 18, 18 are fitted into the cutout recesses 22, 22. Since the projecting portions 23 ..., 23 ... that are aligned with each other and have a positional relationship of being fitted to both sides of the magnetic poles 14, 14 are provided, the pair of E-shaped magnetic paths 11, 11 are moved by the respective frames 18, 18 in the left-right direction ( The X-direction), the front-rear direction (Y-direction), and the up-down direction (Z-direction) are accurately positioned to improve the assembly accuracy.

Further, the pair of frames 18, 18 are fixed to the E-shaped magnetic paths 11, 11 only by the fixing screws M, M which are inserted into the spaces 17, 17 between the outer both leg portions 12, 12 and the central leg portions 14, 14. It is fixed and the assembly is facilitated.

[0012]

【Example】

 Next, an optimum embodiment according to the present invention will be described in detail with reference to the drawings.

1 to 8, 11 is an E-shaped magnetic path made of a soft magnetic material, 12 and 12 are outer end portions of the E-shaped magnetic path 11, 13 and 13 are end faces of the outer end portions 12 and 12. The pair of E-shaped magnetic paths 11, 11 are in close contact with the end faces 13, 13 facing each other. Reference numeral 14 denotes a central leg portion of the E-shaped magnetic paths 11, 11 which constitute magnetic poles which face each other with a predetermined space therebetween and whose facing surfaces are each formed into a semicircular concave surface. Reference numeral 15 is a bobbin made of a non-magnetic material, which is separately wound externally in advance to form the coils 16 and 16, and when the E-shaped magnetic paths 11 and 11 are combined, both outer leg portions 12 and 12 and the central leg portion. The magnetic poles 14, 14 opposed to the spaces 17, 17 with the magnetic poles 14, 14 are inserted so as to circulate. Reference numerals 18 and 18 are frames made of non-magnetic material, and 19 and 19 are bearings supported by the frames 18 and 18. Reference numeral 20 denotes a permanent magnet rotor, which is formed by D-cutting the peripheral surfaces of the cylinder facing each other by 180 °, and the remaining peripheral surfaces are the S pole and the N pole, respectively.

Reference numeral 21 denotes a rotary shaft, and the rotary shaft 21 and bearings 19 and 19 rotatably support the permanent magnet rotor 20. Both end surfaces 11s ..., 11s ... Of each E-shaped magnetic path 11, 11 are sandwiched by a pair of frames 18, 18. When the one frame 18 (the same applies to the other frame 18) and the respective E-shaped magnetic paths 11, 11 are combined, first, the yokes 12 facing each other in the pair of E-shaped magnetic paths 11, 11 which are combined with each other are ... 12 are formed with cutout recesses 22 ..., 22 ... Straddling the respective yokes 12. On the other hand, the frame 18 is integrally provided with projecting portions 23 ..., 23 ... Which are fitted in the cutout recesses 22, 22 and are provided in a positional relationship of fitting on both sides of the magnetic poles 14, 14. That is, as shown in FIGS. 7 and 8, the dimensions of L1, L2, L3, and L4 are selected so that L1 and L3, and further L2 and L4 are substantially matched so that the respective parts are fitted in concave and convex. To do. Each frame 18, 18 is provided with an accommodating portion P, P in which a part of the coil 16, 16 is accommodated.

As a result, the relative position between the permanent magnet rotor 20 and the magnetic poles 14, 14 facing each other can be maintained, and the pair of E-shaped magnetic paths 11, 11 are left and right by the respective frames 18, 18. The direction (X direction), the front-back direction (Y direction), and the vertical direction (Z direction) are accurately positioned, and the assembly accuracy is improved.

Further, the respective frames 18, 18 are fixed to the E-shaped magnetic paths 11, 11 only by the fixing screws M, M inserted into the spaces 17, 17, so that the assembling can be facilitated. Furthermore, 24 is a leaf spring, both ends of which are bent into a U-shape like 25 and 25 and press-fitted into the grooves provided in the E-shaped magnetic paths 11 and 11 by utilizing spring action, and a pair of E The character-shaped magnetic paths 11 and 11 are in close contact with each other at their end faces 13 and 13 and are not separated.

On the other hand, 26 is a lever fixed to the rotary shaft 21, and 27 and 28 are stoppers provided outside. When a direct current is applied to the coil 16 in the direction shown in FIG. 4 with the above structure, the permanent magnet rotor 20 rotates in the clockwise direction, the lever 26 rotates from the solid line position to the dotted line position, and the stopper 27 moves. Crash and stop. The lever rotates counterclockwise from the position indicated by the dotted line to the position indicated by the solid line, collides with the stopper 28, and stops.

[0018]

[Effect of device]

 As described above, the rotary solenoid according to the present invention is constructed such that a pair of E-shaped magnetic paths made of a soft magnetic material are combined such that the outer end faces of the outer leg portions face each other and are in close contact with each other, and the central leg portions face each other. Both outer leg parts are configured as a yoke, and a coil wound outside in advance is inserted into the space between the outer leg parts and the central leg part so as to circulate the magnetic poles, and the permanent magnet rotor is set in the opposite magnetic poles. It is rotatably supported by a rotating shaft and a bearing, and cutout recesses are formed in the yokes facing each other so as to extend over the respective yokes. Both end surfaces of the E-shaped magnetic path are fitted into the cutout recesses, and Since it is configured by being sandwiched by a pair of frames each having a protruding portion provided in a positional relationship so as to be fitted on both sides of the magnetic pole, the following remarkable effects can be obtained.

The pair of E-shaped magnetic paths are accurately positioned in the left-right direction (X direction), the front-back direction (Y direction), and the up-down direction (Z direction) by each frame, so that high quality is achieved by improving the assembly accuracy. Can be realized.

In addition to the above, since the pair of frames are fixed to the E-shaped magnetic path only by the fixing screw, the manufacturing cost can be significantly reduced by facilitating the assembly.

[Brief description of drawings]

FIG. 1 is a side view of a rotary solenoid according to the present invention,

FIG. 2 is a plan view of the rotary solenoid,

FIG. 3 is a front view of the rotary solenoid,

FIG. 4 is a sectional view taken along the line AA in FIG.

5 is a sectional view taken along the line BB in FIG.

6 is a cross-sectional view taken along the line CC in FIG.

FIG. 7 is a perspective view of a combination of two E-shaped magnetic paths,

FIG. 8 is a perspective view of a frame,

FIG. 9 is a cross-sectional view of a rotary solenoid according to the related art,

FIG. 10 is a side sectional view of the rotary solenoid,

FIG. 11 is a front view of another rotary solenoid according to the related art;

FIG. 12 is a side view of the rotary solenoid,

FIG. 13 is a cross-sectional view of another rotary solenoid according to the related art,

[Explanation of symbols]

 11 E-shaped magnetic path 11s Both end surfaces 12 Outer leg portion (yoke) 13 End surface 14 Magnetic pole 16 Coil 17 Space 18 Frame 19 Bearing 20 Permanent magnet rotor 21 Rotating shaft 22 Notch recess 23 Protrusion 24 Leaf spring M Fixing screw P accommodation section

Claims (6)

[Scope of utility model registration request] 1. A pair of E-shaped magnetic paths 1 made of a soft magnetic material.
The end faces 13, 13 of the outer both leg portions 12, 12 of Nos. 1 and 11 are assembled so as to face each other and closely adhere to each other, and the central leg portions are made to face each other as magnetic poles 14 and 14, and the both outer leg portions are connected to the yoke 12,
12, the outer legs 12, 12 and the central leg 1
The coils 16 and 16 wound in advance outside are inserted into the spaces 17 and 17 between the magnetic poles 14 and 14 so as to circulate the magnetic poles 14 and 14, and the permanent magnet rotor 2 is placed in the magnetic poles 14 and 14 facing each other.
0 is rotatably supported by the rotary shaft 21 and the bearings 19, 19, and the yokes 12, 12 facing each other are provided.
In this case, cutout recesses 22, 22 are formed so as to extend over the respective yokes 12, 12, and both end surfaces 11s ..., 11 of the E-shaped magnetic paths 11, 11 are formed.
s ... is fitted in the notch recesses 22, 22, and the magnetic poles 14,
Protrusions 23 provided in a positional relationship that fits on both sides of 14,
A rotary solenoid characterized in that it is sandwiched between a pair of frames 18 having 23. 2. A pair of E-shaped magnetic paths 11, 11 are leaf springs 24, 24 which are engaged with grooves provided in each E-shaped magnetic path 11, 11.
The rotary solenoid according to claim 1, wherein the rotary solenoid is brought into close contact with the rotary solenoid. 3. The pair of frames 18, 18 are the space 1
E-shaped magnetic path 1 by fixing screws M, M inserted through 7, 17
The rotary solenoid according to claim 1 or 2, wherein the rotary solenoid is fixed to the first solenoid and the first solenoid. 4. Each frame 18, 18 has a coil 16,
The rotary solenoid according to claim 1, 2 or 3, wherein the rotary solenoid has accommodating portions P and P in which a part of 16 is accommodated. 5. The rotary solenoid according to claim 1, wherein the facing surfaces of the magnetic poles 14, 14 are each formed into a semicircular concave surface. 6. The permanent magnet rotor 20 has D-cut peripheral surfaces facing each other at 180 ° of a cylinder, and the remaining peripheral surfaces are made S-pole and N-pole, respectively, and magnetic poles 14, 14 are formed.
The rotary solenoid according to claim 1, wherein the rotary solenoid is arranged in a predetermined positional relationship with respect to.