A spherical variable inductor

Abstract

The present invention provides a spherical variable inductor, comprising a rotor core, a rotor coil, a stator core, a stator coil, a rotor bracket and a stator bracket, wherein the rotor core is spherical, the spherical surface of the rotor core is distributed with a spiral first groove, the rotor coil is wound in the first groove, the stator core is hollow spherical, the spherical surface of the stator core is distributed with a spiral second groove, the stator coil is wound in the second groove, the rotor core is installed in the stator core, two first fixing rods extending symmetrically outward are provided on one diameter of the rotor core, two first symmetrical through holes are provided on one diameter of the stator core, the first fixing rod passes through the first through hole, the first fixing rod is rotatably connected to the rotor bracket, and the stator core is fixedly connected to the stator bracket. It is convenient to manually wind the rotor coil and the stator coil, and the batch manual winding has high inductance accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of variable inductors, and in particular to a spherical variable inductor. Background Art

[0002] Spherical variable inductors can achieve continuous variable inductance within a certain range, and are particularly suitable for use in high-power communication equipment. The Chinese invention patent with publication number CN103247416B discloses a spherical variable inductor, whose rotor coil includes two electrically connected parts, each part of the rotor coil is bowl-shaped, and the two parts of the rotor coil are respectively wound on the upper and lower sides of the second disc-shaped rotor frame, and its stator coil includes two electrically connected parts, each part of the stator coil is bowl-shaped, and the two parts of the stator coil are respectively wound on the inner ends of four C-shaped stator brackets, and the front and rear sides are opposite. The spherical variable inductor disclosed in the patent has the disadvantages that the coil is not easy to wind, especially not easy to wind manually in batches, and the rotor coil and the stator coil are divided into two electrically connected parts, and welding points will appear at the electrical connection parts. These factors make the inductance accuracy low. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a spherical variable inductor, which is convenient for manually winding the stator coil and the rotor coil, and the continuity of the stator coil and the rotor coil is maintained during the winding process.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A spherical variable inductor comprises a rotor core, a rotor coil, a stator core, a stator coil, a rotor bracket and a stator bracket, wherein the rotor core is spherical, a spiral first groove is distributed on the spherical surface of the rotor core, and the rotor coil is wound in the first groove; the stator core is hollow spherical, a spiral second groove is distributed on the spherical surface of the stator core, and the stator coil is wound in the second groove; the rotor core is installed in the stator core, and the center of the rotor core coincides with the center of the stator core; two first fixing rods extending symmetrically outward are provided on one diameter of the rotor core; two first through holes are provided symmetrically on one diameter of the stator core; the first fixing rod passes through the first through hole; the first fixing rod is rotatably connected to the rotor bracket; and the stator core is fixedly connected to the stator bracket.

[0006] Furthermore, the first fixing rod is provided with a threading hole, and the end of the rotor coil passes through the threading hole.

[0007] Furthermore, the rotor core is a hollow structure, and the first fixing rod is provided with a second through hole as a threading hole, the second through hole is connected to the inner cavity of the rotor core, and the rotor core is provided with two wiring holes, one end of the rotor coil extends into the inner cavity of the rotor core from one of the wiring holes, and then extends out from one of the second through holes of the first fixing rod, and the other end extends into the inner cavity of the rotor core from the other wiring hole, and then extends out from the other second through hole of the first fixing rod.

[0008] Furthermore, the rotor core is two symmetrically arranged hemispherical rotor cores, and the two hemispherical rotor cores are provided with tenons and grooves for locking connection at the butt surfaces.

[0009] Furthermore, the stator core is two symmetrical hollow hemispherical stator cores, and the two hollow hemispherical stator cores are provided with fixing blocks extending outward along the diameter at the mating surface, and the fixing blocks are provided with corresponding third through holes, and the screws pass through the third through holes of the two hollow hemispherical stator cores and are threadedly connected with the nuts.

[0010] Furthermore, the end of the first fixing rod is in a square shape.

[0011] Furthermore, two second fixing rods extending symmetrically outward are provided on a diameter of the stator core, and the second fixing rods are fixedly connected to the stator bracket.

[0012] Furthermore, it also includes a stepper motor, an elastic coupling, and a rotor connecting shaft. The output shaft of the stepper motor is fixedly connected to the rotor connecting shaft through the elastic coupling, the rotor connecting shaft is fixedly connected to one of the first fixing rods, and the rotor connecting shaft is rotatably connected to the rotor bracket.

[0013] Furthermore, it also includes a brush, which includes a copper bearing, a mounting plate, a spring and a wire. The outer ring of the copper bearing is fixed to the rotor bracket, the inner ring of the copper bearing is sleeved on the rotor connecting shaft, the mounting plate is fixed to the rotor bracket, the two ends of the spring are horizontal sections, and the middle is a circular arc section, the horizontal sections at both ends of the spring are fixed to the mounting plate, the outer cylindrical surface of the circular arc section in the middle of the spring is pressed against the outer cylindrical surface of the rotor connecting shaft, one end of the wire is connected to the spring, and the other end is connected to the copper bearing, one end of the stator coil is electrically connected to the brush, and one end of the rotor coil is electrically connected to the brush through the rotor connecting shaft.

[0014] Furthermore, the mounting plate is horizontally arranged, and a rectangular through groove running through from top to bottom is provided in the middle of the inner side surface of the mounting plate. The horizontal sections at both ends of the spring sheet are fixed to the upper surface of the mounting plate by screws, and the arc section in the middle of the spring sheet extends downward from the rectangular through groove of the mounting plate, and the rotor connecting shaft is located below the mounting plate.

[0015] The beneficial effects of the present invention are as follows: the rotor core is located in the hollow stator core, a single rotor coil is continuously spirally wound in the first groove, and a single stator coil is continuously spirally wound in the second groove, so that the continuity of the rotor coil and the stator coil is maintained, and the stator coil and the rotor coil are wound according to a preset trajectory, the lengths of the rotor coil and the stator coil are constant, which is convenient for manual winding, and the inductance accuracy of the rotor coil and the stator coil is high during manual batch winding; the two first fixing rods of the rotor core extend out of the two first through holes of the stator core, so that the rotor core can be installed in the hollow stator core. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional diagram of a spherical variable inductor of the present invention;

[0017] Figure 2 is a front view of a spherical variable inductor according to the present invention;

[0018] Figure 3 It is a left side view of the spherical variable inductor of the present invention;

[0019] Figure 4 An exploded view of a stator core and a rotor core of a spherical variable inductor of the present invention;

[0020] Figure 5 An exploded view of a rotor core of a spherical variable inductor according to the present invention;

[0021] Figure 6 A front view of the connection between the brush of the spherical variable inductor of the present invention and the rotor connecting shaft;

[0022] Figure 7 It is a left side view of the connection between the brush of the spherical variable inductor of the present invention and the rotor connecting shaft;

[0023] Figure 8 An exploded view of the brush of the spherical variable inductor of the present invention.

[0024] Description of labels:

[0025] 1. Rotor core; 2. Stator core; 3. Rotor bracket; 4. Stator bracket; 5. Stepper motor; 6. Elastic coupling; 7. Rotor connecting shaft; 8. Brush; 9. Rocker; 10. Limit switch;

[0026] 11. first groove; 12. first fixing rod; 13. wiring hole; 14. hemispherical rotor core; 15. tenon; 16. slot;

[0027] 121, second through hole;

[0028] 21. second groove; 22. first through hole; 23. hollow hemispherical stator core; 24. fixing block; 25. second fixing rod;

[0029] 241, third through hole;

[0030] 81. Copper bearing; 82. Mounting plate; 83. Shrapnel; 84. Wire. DETAILED DESCRIPTION

[0031] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0032] Please refer to Figures 1 to 8 , Embodiment 1 provided by the present invention is:

[0033] A spherical variable inductor comprises a rotor core 1, a rotor coil, a stator core 2, a stator coil, a rotor support 3 and a stator support 4, wherein the rotor core 1 is spherical, and a spiral first groove 11 is distributed on the spherical surface of the rotor core 1, and the rotor coil is wound in the first groove 11; the stator core 2 is hollow spherical, and a spiral second groove 21 is distributed on the spherical surface of the stator core 2, and the stator coil is wound in the second groove 21; the rotor core 1 is installed in the stator core 2, and the center of the rotor core 1 coincides with the center of the stator core 2; two first fixing rods 12 extending symmetrically outward are provided on one diameter of the rotor core 1, and two first through holes 22 are provided symmetrically on one diameter of the stator core 2, and the first fixing rod 12 passes through the first through hole 22, and the first fixing rod 12 is rotatably connected to the rotor support 3, and the stator core 2 is fixedly connected to the stator support 4.

[0034] The rotor core 1 can be hollow or solid. The rotor coil is wound according to a preset track of the first groove 11. The rotor core 1 is located in the stator core 2. The stator coil is wound according to a preset track of the second groove 21. During installation, the rotor core 1 with the rotor coil wound is placed in the hollow stator core 2, and two fixing rods are extended out of two first through holes 22. Then the stator core 2 is fixed and the stator coil is wound on the stator core 2. Finally, the stator core 2 is fixedly installed on the stator bracket 4, and the rotor core 1 is rotatably installed on the rotor bracket 3, so that the rotor coil and the stator coil are both kept in a single continuous winding, and the winding length and track are fixed, thereby ensuring the accuracy of the inductance of the spherical variable inductor and facilitating manual winding.

[0035] Furthermore, the width of the first groove 11 is adapted to the diameter of the rotor coil, and the width of the second groove 21 is adapted to the diameter of the stator coil. Specifically, the width of the first groove 11 and the diameter of the rotor coil are interference fit, and the width of the second groove 21 and the diameter of the stator coil are interference fit, thereby making it easy to wind the rotor coil and the stator coil with high winding accuracy.

[0036] Preferably, the cross-sectional shape of the first groove 11 is rectangular, semicircular or U-shaped, which is convenient for winding the rotor coil; the cross-sectional shape of the second groove 21 is rectangular, semicircular or U-shaped, which is convenient for winding the stator coil.

[0037] The second embodiment provided by the present invention is:

[0038] On the basis of the first embodiment, specifically, a threading hole is provided on the first fixing rod 12, and the end of the rotor coil passes through the threading hole.

[0039] The end of the rotor coil is positioned through a threading hole, which can protect the rotor coil on the one hand and improve the inductance accuracy of the rotor coil on the other hand.

[0040] The third embodiment provided by the present invention is:

[0041] On the basis of the second embodiment, specifically, the rotor core 1 is a hollow structure, the first fixing rod 12 is provided with a second through hole 121 as a threading hole, the second through hole 121 is connected to the inner cavity of the rotor core 1, the rotor core 1 is provided with two wiring holes 13, one end of the rotor coil extends into the inner cavity of the rotor core 1 from one of the wiring holes 13, and then extends out from one of the second through holes 121 of the first fixing rod 12, and the other end extends into the inner cavity of the rotor core 1 from the other wiring hole 13, and then extends out from the other second through hole 121 of the first fixing rod 12.

[0042] When the rotor coil is wound, it first enters the inner cavity of the rotor core 1 through a second through hole 121, then passes through a wiring hole 13 to the outside of the rotor core 1, is wound according to the trajectory of the first groove 11, and then passes through another wiring hole 13 to the inner cavity of the rotor core 1, and passes out of the rotor core 1 from another second through hole 121. The two ends of the rotor coil are protected by the two second through holes 121, and the two ends of the rotor coil are positioned by the two second through holes 121 and the two wiring holes 13, so as to improve the accuracy and stability of the rotor coil winding.

[0043] Preferably, the second through hole 121 is arranged along the length direction of the first fixing rod 12 to facilitate processing.

[0044] The fourth embodiment provided by the present invention is:

[0045] On the basis of the first, second or third embodiment, specifically, the rotor core 1 is two symmetrically arranged hemispherical rotor cores 14, and the two hemispherical rotor cores 14 are provided with a latching connection tenon 15 and a latching groove 16 at the butt surface. Through the latching connection of the tenon 15 and the latching groove 16, the two hemispherical rotor cores 14 are assembled into one rotor core 1, which has good structural stability and is easy to install.

[0046] Preferably, the two hemispherical rotor cores 14 are provided with an even number of pairs of tenons 15 and slots 16 at the docking surfaces, and one hemispherical rotor core 14 is provided with a tenon 15 and a slot 16 in one diameter direction. On the one hand, the even number of pairs of tenons 15 and slots 16 are subjected to opposite forces after the two hemispherical rotor cores 14 are docked, and are not easy to open after docking, and have good structural stability. On the other hand, it is easy to make the two hemispherical rotor cores 14 into structures with the same shape, saving processing costs.

[0047] Embodiment 5 provided by the present invention is:

[0048] On the basis of the first embodiment, specifically, the stator core 2 is two symmetrical hollow hemispherical stator cores 23, and the two hollow hemispherical stator cores 23 are provided with a fixing block 24 extending outward along the diameter at the butt surface, and the fixing block 24 is provided with a corresponding third through hole 241, and the screw passes through the third through hole 241 of the two hollow hemispherical stator cores 23 and is screwed with the nut. The two hollow hemispherical stator cores 23 are fixedly connected by screws, and installation and maintenance are convenient.

[0049] The sixth embodiment provided by the present invention is:

[0050] On the basis of the first embodiment, specifically, the end of the first fixing rod 12 is in a square shape, so that the rotor coil is not prone to slipping during movement, and the structure has good stability.

[0051] Embodiment 7 provided by the present invention is:

[0052] On the basis of the first embodiment, specifically, two second fixing rods 25 extending symmetrically outward are provided on one diameter of the stator core 2, and the second fixing rods 25 are fixedly connected to the stator bracket 4, so as to facilitate installation.

[0053] Furthermore, the end of the second fixing rod 25 is in a square shape, and has good structural stability.

[0054] Embodiment 8 provided by the present invention is:

[0055] On the basis of embodiment 1, further, it also includes a stepper motor 5, an elastic coupling 6 and a rotor connecting shaft 7, the output shaft of the stepper motor 5 is fixedly connected to the rotor connecting shaft 7 through the elastic coupling 6, the rotor connecting shaft 7 is fixedly connected to one of the first fixed rods 12, and the rotor connecting shaft 7 is rotatably connected to the rotor bracket 3; it also includes a rocker rod 9 and two limit switches 10, one end of the rocker rod 9 is fixedly connected to the other of the first fixed rods 12, and the other end touches the two limit switches 10 at two extreme positions respectively, and the rocker rod 9 swings back and forth within a range of 180° in the circumferential direction.

[0056] The stepper motor 5 is connected to the rotor core 1 through an elastic coupling 6 and a rotor connecting shaft 7. The stepper motor 5 drives the rotor core 1 and the rotor coil to rotate, and the stepper motor 5 controls the rotation angle of the rotor coil. The rocker arm 9 and two limit switches 10 are used to detect whether the rotor coil rotates to two extreme positions, so that the operation accuracy is high.

[0057] Embodiment 9 provided by the present invention is:

[0058] On the basis of the eighth embodiment, further, it also includes a brush 8, the brush 8 includes a copper bearing 81, a mounting plate 82, a spring 83 and a wire 84, the outer ring of the copper bearing 81 is fixed on the rotor bracket 3, the inner ring of the copper bearing 81 is sleeved on the rotor connecting shaft 7, the mounting plate 82 is fixed on the rotor bracket 3, the two ends of the spring 83 are horizontal sections, and the middle is a circular arc section, the horizontal sections at both ends of the spring 83 are fixed on the mounting plate 82, the outer cylindrical surface of the middle circular arc section of the spring 83 is pressed on the outer cylindrical surface of the rotor connecting shaft 7, one end of the wire 84 is connected to the spring 83, and the other end is connected to the copper bearing 81, one end of the stator coil is electrically connected to the brush 8, and one end of the rotor coil is electrically connected to the brush 8 through the rotor connecting shaft 7.

[0059] Specifically, the rotor bracket 3 is connected to the outer ring of the copper bearing 81, the rotor connecting shaft 7 is connected to the inner ring of the copper bearing 81, the other end of the wire 84 is also connected to the outer ring of the copper bearing 81, and one end of the wire 84 is connected to the spring 83. The arc segment of the spring 83 is always pressed against the outer cylindrical surface of the rotor connecting shaft 7 under its own elastic force. One end of the rotor coil is electrically connected to the rotor connecting shaft 7, and the stator coil is electrically connected to the brush 8. Specifically, the stator coil can be electrically connected to the outer ring of the copper bearing 81, the spring 83 or the screws on the rotor bracket 3 used to fix the copper bearing 81 and the spring 83, that is, the electrical connection between the first stator coil and the rotor coil is realized through the copper bearing 81. When the brush 8 is running, the inner ring and the outer ring of the copper bearing 81 rotate relative to each other, and the copper bearing 81 itself has a certain degree of circular runout. There is a possibility of intermittent connection to a certain extent. The spring clip 83 is used to always press the rotor connecting shaft 7 downward, that is, the spring clip 83 is always electrically connected to the rotor connecting shaft 7. On the one hand, it prevents the copper bearing 81 from circular runout when rotating, and ensures the stability of the electrical connection between the inner ring and the outer ring of the copper bearing 81. On the other hand, the spring clip 83 is combined with the wire 84 to realize the electrical connection between the rotor connecting shaft 7 and the rotor bracket 3 from another path, that is, the second electrical connection between the stator coil and the rotor coil is realized, so that the electrical connection between the stator coil and the rotor coil is stable, ensuring the stability of signal transmission when the communication equipment is running, avoiding sparking and spark jumping, thereby avoiding electromagnetic compatibility problems such as electromagnetic interference and electromagnetic radiation caused by sparking, avoiding adhesion and carbonization of the brush 8, and improving the service life of the communication equipment.

[0060] Furthermore, the mounting plate 82 is horizontally arranged, and a rectangular through groove extending from top to bottom is provided in the middle of the inner side surface of the mounting plate 82. The horizontal sections at both ends of the spring sheet 83 are fixed to the upper surface of the mounting plate 82 by screws, and the arc section in the middle of the spring sheet 83 extends downward from the rectangular through groove of the mounting plate 82. The rotor connecting shaft 7 is located below the mounting plate 82.

[0061] Specifically, through holes are provided on both ends of the upper surface of the mounting plate 82 and on the horizontal sections at both ends of the spring sheet 83. Screws pass through the through holes on the mounting plate 82 and the through holes on the spring sheet 83 and are screwed to nuts to fix the horizontal sections at both ends of the spring sheet 83 on the mounting plate 82. The arc section in the middle of the spring sheet 83 extends downward from the rectangular through groove of the mounting plate 82 and presses on the outer circular surface of the rotor connecting shaft 7. The rectangular through groove provides an installation space for the middle arc section of the spring sheet 83. The front side wall of the rectangular through groove protects the spring sheet 83, prevents other objects from touching the spring sheet 83, and ensures the stability of the spring sheet 83.

[0062] During operation, the stepper motor 5 drives the rotor core 1 and the rotor coil to swing back and forth within a range of 180°, that is, the rotation of the motor drives the inductance of the spherical variable inductor to change. Through detection by two limit switches 10, the spherical variable inductor swings between the left limit position and the right limit position when rotating, thereby realizing continuous adjustment of the inductance.

[0063] In summary, the spherical variable inductor provided by the present invention has a rotor core 1 and a stator core 2 which are complete spherical structures. The rotor coil and the stator coil are both wound according to a preset track, which is convenient for manual winding and ensures the accuracy of the inductance during manual winding. The stepper motor 5 drives the rotor core 1 and the rotor coil to rotate back and forth within a range of 180° to adjust the inductance. The swing rod 9 and the limit switch 10 further ensure the adjustment accuracy of the inductance. The brush 8 ensures the electrical connection between the rotor coil and the stator coil. The brush 8 has good structural stability, so that the spherical variable inductor can achieve continuous adjustable inductance as a whole, is convenient for manual winding of coils, is convenient for batch manual winding, has high inductance accuracy, has stable performance of the brush 8, is not prone to sparking or spark jump, has good communication stability, and has a long service life.

[0064] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A spherical variable inductor, characterized in that: The invention comprises a rotor core, a rotor coil, a stator core, a stator coil, a rotor bracket and a stator bracket, wherein the rotor core is spherical, a spiral first groove is distributed on the spherical surface of the rotor core, and the rotor coil is wound in the first groove; the stator core is hollow spherical, a spiral second groove is distributed on the spherical surface of the stator core, and the stator coil is wound in the second groove; the rotor core is installed in the stator core, and the center of the rotor core coincides with the center of the stator core; two first fixing rods extending symmetrically outward are provided on one diameter of the rotor core; two first through holes are symmetrically provided on one diameter of the stator core; the first fixing rod passes through the first through hole; the first fixing rod is rotatably connected to the rotor bracket; and the stator core is fixedly connected to the stator bracket; The first fixing rod is provided with a threading hole, and the end of the rotor coil passes through the threading hole; The rotor core is a hollow structure, the first fixing rod is provided with a second through hole as a threading hole, the second through hole is communicated with the inner cavity of the rotor core, the rotor core is provided with two wiring holes, one end of the rotor coil extends into the inner cavity of the rotor core from one of the wiring holes, and then extends out from one of the second through holes of the first fixing rod, and the other end extends into the inner cavity of the rotor core from another wiring hole, and then extends out from the other second through hole of the first fixing rod; It also includes a stepper motor, an elastic coupling and a rotor connecting shaft, wherein the output shaft of the stepper motor is fixedly connected to the rotor connecting shaft through the elastic coupling, the rotor connecting shaft is fixedly connected to one of the first fixing rods, and the rotor connecting shaft is rotatably connected to the rotor bracket; It also includes a brush, which includes a copper bearing, a mounting plate, a spring and a wire. The outer ring of the copper bearing is fixed to the rotor bracket, the inner ring of the copper bearing is sleeved on the rotor connecting shaft, the mounting plate is fixed to the rotor bracket, the two ends of the spring are horizontal sections, and the middle is a circular arc section, the horizontal sections at both ends of the spring are fixed to the mounting plate, the outer cylindrical surface of the circular arc section in the middle of the spring is pressed against the outer cylindrical surface of the rotor connecting shaft, one end of the wire is connected to the spring, and the other end is connected to the copper bearing, one end of the stator coil is electrically connected to the brush, and one end of the rotor coil is electrically connected to the brush through the rotor connecting shaft.

2. The spherical variable inductor according to claim 1, characterized in that: The rotor cores are two symmetrically arranged hemispherical rotor cores, and the two hemispherical rotor cores are provided with tenons and slots for locking connection at the butt surfaces.

3. The spherical variable inductor according to claim 1, characterized in that: The stator core is two symmetrical hollow hemispherical stator cores, and the two hollow hemispherical stator cores are provided with fixing blocks extending outward along the diameter at the butt surface, and the fixing blocks are provided with corresponding third through holes, and the screws pass through the third through holes of the two hollow hemispherical stator cores and are threadedly connected with nuts.

4. The spherical variable inductor according to claim 1, characterized in that: The end of the first fixing rod is in a square shape.

5. The spherical variable inductor according to claim 1, characterized in that: Two second fixing rods extending symmetrically outward are arranged on a diameter of the stator core, and the second fixing rods are fixedly connected to the stator bracket.

6. The spherical variable inductor according to claim 1, characterized in that: The mounting plate is arranged horizontally, and a rectangular through groove which passes through from top to bottom is provided in the middle of the inner side surface of the mounting plate. The horizontal sections at both ends of the spring sheet are fixed to the upper surface of the mounting plate by screws, and the arc section in the middle of the spring sheet extends downward from the rectangular through groove of the mounting plate, and the rotor connecting shaft is located below the mounting plate.

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