A torque-variable permanent magnet brushless motor

Abstract

The present invention belongs to a brushless motor, and in particular to a torque-variable permanent magnet brushless motor. A torque-variable permanent magnet brushless motor that changes torque through structural improvement includes a mounting component, etc.; a rotating component that can rotate is mounted on the mounting component, a stator component is mounted between the rotating component and the mounting component, a rotor component is rotatably connected to the stator component, and the rotor component covers the stator component, and an axis component is vertically mounted in the center of the rotor component. The present invention rotates the hollow shaft portion by rotating the barrel portion forward and backward to adjust the distance between the iron core and the magnetic sheet, thereby adjusting the torque of the brushless motor, which is convenient and quick, and will not damage the brushless motor; when it is necessary to further increase the torque of the brushless motor, the arc length of the outer surface of the iron core is increased by the filling block, so that the thrust of the iron core on the magnetic sheet is more stable, so that the torque of the brushless motor is further enhanced, and at the same time the filling block is pressed on the iron core to increase the arc length of the outer surface of the iron core.

Description

Technical Field

[0001] The invention belongs to a brushless motor, and in particular relates to a variable torque permanent magnet brushless motor. Background Art

[0002] The permanent magnet brushless motor is a special type of brushless motor that uses permanent magnets to generate the magnetic field of the rotor. This type of motor combines the advantages of brushless motors and permanent magnet motors, providing high efficiency, long life, compact design, and good dynamic response.

[0003] Currently, the way brushless motors change torque is generally that the motor controller accurately controls the size and direction of the current to effectively adjust the output torque of the motor. Although this method can change the output torque of the motor, it is easy to burn out the brushless motor and reduce the service life of the brushless motor. Therefore, there is still a lot of room for improvement in the way brushless motors change torque.

[0004] In summary, there is an urgent need to develop a variable torque permanent magnet brushless motor that can change the torque through structural improvement to solve the above technical problems. Summary of the invention

[0005] In order to overcome the above-mentioned disadvantages of the prior art, the present invention provides a variable torque permanent magnet brushless motor with variable torque through structural improvement.

[0006] The technical implementation scheme of the present invention is: a torque-variable permanent magnet brushless motor, including a mounting component, a rotating component, a stator component, a rotor component and a shaft component, a rotating component capable of rotation is mounted on the mounting component, a stator component is installed between the rotating component and the mounting component, the rotor component is rotationally connected to the stator component, and the rotor component covers the stator component, and a shaft component is vertically installed at the center of the rotor component; the rotating component includes a barrel portion sleeved on the mounting component, a top screw I symmetrically connected to the side wall of the barrel portion by a thread, and a hollow shaft portion vertically installed at the top center of the barrel portion, the stator component includes a slide plate, an iron core, a hinged plate and a coil, a slide plate is slidably connected to the upper part of the mounting component, an iron core is connected between the outer ends of the slide plates in the same vertical row, a coil is wound on the iron core, and a hinged plate is rotationally connected between the slide plate above the iron core and the hollow shaft portion.

[0007] As a preferred technical solution of the present invention, the mounting component includes a mounting seat, a connecting plate and a mounting tube, an annular groove is provided on the upper outer surface of the mounting seat, a connecting plate is symmetrically arranged on the top of the mounting seat, a mounting tube is fixedly connected to the top of the connecting plate, sockets are evenly spaced on the lower part of the mounting tube, and sliding grooves are evenly spaced on the upper surface of the mounting tube.

[0008] As a preferred technical solution of the present invention, the inner end of the top screw I is in the annular groove, the top of the cylinder is symmetrically provided with arc grooves, and the connecting plate passes through the arc grooves.

[0009] As a preferred technical solution of the present invention, it also includes a bearing seat I, the bearing seat I is placed in the installation cylinder, and the bearing seat I is interference connected with the hollow shaft.

[0010] As a preferred technical solution of the present invention, the rotor component includes a rotating shell, a partition, a magnetic sheet, a boss and a top screw II. A partition is installed on the inner side of the rotating shell, a magnetic sheet is installed in the partition, a boss is installed at the top center of the rotating shell, and a top screw II is symmetrically arranged on the side of the boss through a thread.

[0011] As a preferred technical solution of the present invention, the shaft component is a rotating shaft, and the rotating shaft passes through the lower part of the boss and extends into the hollow shaft part.

[0012] As a preferred technical solution of the present invention, it also includes a bearing seat II and an annular cone block. The lower part of the rotating shaft is connected to an annular cone block with a cone surface downward. The upper part of the hollow shaft is embedded with a bearing seat II. The bearing seat II is interference connected to the rotating shaft.

[0013] As a preferred technical solution of the present invention, it also includes a filling component. The filling component is arranged on the outer side of the mounting tube. The filling component includes a threaded block, a protrusion, an elastic telescopic rod, a filling block and a follower wheel. The bottom of the mounting tube is connected to the threaded block by a thread. The threaded block is evenly spaced circumferentially. The mounting tube above the protrusion is evenly spaced circumferentially and slidingly arranged with four elastic telescopic rods in a group. The end of the elastic telescopic rod is connected to the filling block. The outer side of the filling block can fit with the iron core, and the bottom end of the elastic telescopic rod is connected to the follower wheel.

[0014] The beneficial effects of the present invention are as follows: the distance between the iron core and the magnetic sheet is adjusted by rotating the cylinder forward and backward, thereby adjusting the torque of the brushless motor, which is convenient and quick, and will not damage the brushless motor; when the torque of the brushless motor needs to be further increased, the arc length of the outer surface of the iron core is increased by the filling block, so that the thrust of the iron core on the magnetic sheet is more stable, and the torque of the brushless motor is further enhanced, and at the same time the filling block is pressed on the iron core, so that the arc length of the outer surface of the iron core becomes larger, which prevents the gap between the iron cores from becoming larger due to the outward movement of the iron core, and the occurrence of insufficient thrust when the magnetic sheet approaches the gap position. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the installation component of the present invention.

[0018] Figure 4It is a schematic diagram of the three-dimensional structure of the rotating component of the present invention.

[0019] Figure 5 This is the front view of the assembly of the mounting component and the rotating component of the present invention.

[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of the stator component of the present invention.

[0021] Figure 7 It is a schematic diagram of the three-dimensional structure of the rotor component of the present invention.

[0022] Figure 8 It is a schematic diagram of the three-dimensional structure of the shaft component of the present invention.

[0023] Fig. 9 It is a bottom view of the filling component of the present invention.

[0024] In the accompanying drawings: 1: mounting component, 101: mounting seat, 102: annular groove, 103: connecting plate, 104: mounting cylinder, 105: socket, 106: slide groove, 107: bearing seat I, 2: rotating component, 201: cylinder, 202: top screw I, 203: arc groove, 204: hollow shaft, 205: bearing seat II, 3: stator component, 301: slide plate, 302: iron core, 303: hinged plate, 304: coil, 4: rotor component, 401: rotating shell, 402: partition, 403: magnetic sheet, 404: boss, 405: top screw II, 5: shaft component, 501: rotating shaft, 502: annular cone block, 6: filling component, 601: threaded block, 602: bump, 603: elastic telescopic rod, 604: filling block, 605: follower wheel. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope and application scope of the present invention are not limited.

[0026] Embodiment 1: A variable torque permanent magnet brushless motor, such as Figure 1-Figure 8 As shown, it includes a mounting component 1, a rotating component 2, a stator component 3, a rotor component 4 and an axis component 5. The mounting component 1 is provided with a rotatable rotating component 2, the stator component 3 is installed between the rotating component 2 and the mounting component 1, the rotor component 4 is rotatably connected to the stator component 3, and the rotor component 4 covers the stator component 3, and the axis component 5 is vertically installed at the center of the rotor component 4.

[0027] Such as 3 and Figure 5As shown, the mounting component 1 includes a mounting seat 101, a connecting plate 103 and a mounting cylinder 104, an annular groove 102 is concentrically provided on the upper outer surface of the mounting seat 101, a connecting plate 103 is symmetrically provided on the top of the mounting seat 101, a mounting cylinder 104 is fixedly connected to the top of the connecting plate 103, sockets 105 are evenly spaced at the bottom of the mounting cylinder 104, and sliding grooves 106 are evenly spaced at the upper surface of the mounting cylinder 104.

[0028] like Figure 6 As shown, the stator component 3 includes a slide plate 301, an iron core 302, a hinged plate 303 and a coil 304. The slide plates 301 are slidably connected in the jack 105 and the slide groove 106. The iron core 302 is connected between the outer ends of the slide plates 301 in the same vertical row. The coil 304 is wound on the iron core 302. The hinged plate 303 is rotatably connected between the slide plate 301 above the iron core 302 and the hollow shaft portion 204.

[0029] like Figure 7 As shown, the rotor component 4 includes a rotating shell 401, a partition 402, a magnetic piece 403, a boss 404 and a top screw II 405. The partition 402 is installed on the inner side of the rotating shell 401, and the magnetic piece 403 is installed in the partition 402. The boss 404 is installed at the top center of the rotating shell 401, and the top screw II 405 is symmetrically arranged on the side of the boss 404 through threads.

[0030] like Figure 8 As shown, the shaft component 5 is a rotating shaft 501, and the rotating shaft 501 passes through the lower part of the boss 404 and extends into the hollow shaft part 204.

[0031] like Figure 8 As shown, it also includes a bearing seat II 205 and an annular cone block 502. The lower part of the rotating shaft 501 is connected to the annular cone block 502 with the cone surface downward. The upper part of the hollow shaft 204 is embedded with a bearing seat II 205. The bearing seat II 205 is interference connected with the rotating shaft 501, and the annular cone block 502 is above the bearing seat II 205.

[0032] When the torque-variable permanent magnet brushless motor is needed, the brushless motor is first installed at the working position, and the bolts are passed through the through holes on the mounting seat 101, and then screwed into the threaded holes of the mounting seat to complete the installation of the brushless motor. Subsequently, the object to be driven to rotate is fixed on the rotating shaft 501 or the rotating shell 401, and then the brushless motor is energized. The iron core 302 generates magnetic force, pushing the magnetic sheet 403 to start rotating, thereby driving the rotating shell 401 and the rotating shaft 501 to start rotating, and driving the object to be rotated to rotate. The bearing seat II 205 can reduce the friction of the rotating shaft 501, so that the rotating shaft 501 can rotate more smoothly. The annular cone block 502 is pressed on the upper surface of the bearing seat II 205, and the rotating shaft 501 can be limited in the vertical direction, so that the rotating shaft 501 can be better installed and work. When the brushless motor is not needed to work, it can be powered off.

[0033] Embodiment 2: Based on embodiment 1, Figure 3 and Figure 4 As shown, in order to change the torque of the brushless motor, the rotating component 2 includes a barrel 201 sleeved on the upper part of the mounting seat 101, a top screw Ⅰ202 symmetrically connected to the side wall of the barrel 201 through a thread, and a hollow shaft 204 vertically installed at the top center of the barrel 201, the inner end of the top screw Ⅰ202 is in the annular groove 102, and an arc groove 203 is symmetrically opened on the top of the barrel 201, and the connecting plate 103 passes through the arc groove 203.

[0034] like Figure 2 and Figure 3 As shown, a bearing seat Ⅰ107 is also included. The bearing seat Ⅰ107 is placed in the mounting cylinder 104, and the bearing seat Ⅰ107 is interference connected with the hollow shaft portion 204.

[0035] like Fig. 9 The figure shows that it also includes a filling component 6. The filling component 6 is arranged on the outer side of the mounting cylinder 104. The filling component 6 includes a threaded block 601, a protrusion 602, an elastic telescopic rod 603, a filling block 604 and a follower wheel 605. The bottom of the mounting cylinder 104 is connected to the threaded block 601 by a thread. The threaded block 601 is evenly spaced circumferentially. The mounting cylinder 104 above the protrusion 602 is evenly spaced circumferentially and slidingly arranged with four elastic telescopic rods 603 in a group. The end of the elastic telescopic rod 603 is connected to the filling block 604. The outer side of the filling block 604 can be fitted with the iron core 302. The bottom end of the elastic telescopic rod 603 is connected to the follower wheel 605, and the outer surface of the follower wheel 605 is fitted with the outer surface of the protrusion 602.

[0036] When it is necessary to reduce the torque of the brushless motor, first loosen the top screw 1202, then rotate the barrel 201 to rotate the hollow shaft 204, so that the iron core 302 is pulled toward the middle away from the magnetic sheet 403 through the hinge plate 303, so that the magnetic force of the iron core 302 on the magnetic sheet 403 becomes smaller as the distance increases, so that the torque of the brushless motor becomes smaller. When it is necessary to increase the torque of the brushless motor, reverse the barrel 201 to make the hollow shaft 204 rotate in the opposite direction, and push the iron core 302 outward close to the magnetic sheet 403 through the hinge plate 303, so that the iron core 302 As the distance becomes closer, the magnetic force of 02 generates a greater thrust on the magnetic sheet 403, which increases the torque of the brushless motor. After the torque of the brushless motor is adjusted, tighten the top screw Ⅰ202 again so that the top screw Ⅰ202 is pressed against the annular groove 102 of the mounting seat 101 to fix the barrel 201 and the device thereon. The bottom of the top screw Ⅰ202 is in the annular groove 102, which can better fix it and also reduce the damage of the top screw Ⅰ202 to the mounting seat 101. The bearing seat Ⅰ107 can reduce the friction of the hollow shaft rotation, so that the hollow shaft can rotate more easily.

[0037] When the torque of the brushless motor needs to be further increased, the threaded block 601 is rotated clockwise to drive the protrusion 602 to rotate clockwise. The farthest end of the protrusion 602 is close to the follower wheel 605, pushing the follower wheel 605 to move outward, thereby driving the elastic telescopic rod 603 and the filling block 604 to move outward, so that the filling block 604 is pressed against the iron core 302, so that the arc length of the outer surface of the iron core 302 becomes larger, and the magnetic force generated by the iron core 302 is also transmitted to the filling block 604, preventing the iron core 302 from The outward movement causes the interval between the iron cores 302 to become larger. When the magnetic piece 403 is close to the interval position, the thrust is insufficient. At the same time, the angle for pushing the magnetic piece 403 to rotate is increased, so that the torque for rotating the rotor component 4 is further increased. When there is no need to further increase the torque of the rotor component 4, the threaded block 601 is reversed to drive the protrusion 602 to reverse, so that the farthest end of the protrusion 602 leaves the follower wheel 605. Under the action of the elastic telescopic rod 603, the filling block 604 moves inward and resets.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A torque-variable permanent magnet brushless motor, comprising a mounting component (1), a rotating component (2), a stator component (3), a rotor component (4) and a shaft component (5), wherein a rotating component (2) capable of rotation is mounted on the mounting component (1), a stator component (3) is mounted between the rotating component (2) and the mounting component (1), a rotor component (4) is rotationally connected to the stator component (3), and the rotor component (4) covers the stator component (3), and a shaft component (5) is vertically mounted at the center of the rotor component (4); characterized in that: The rotating component (2) comprises a barrel (201) sleeved on the mounting component (1), a top screw I (202) symmetrically connected to the side wall of the barrel (201) by means of a thread, and a hollow shaft (204) vertically mounted at the top center of the barrel (201). The stator component (3) comprises a slide plate (301), an iron core (302), a hinge plate (303) and a coil (304). The upper part of the mounting component (1) is slidably connected to the slide plate (301), the outer ends of the slide plates (301) in the same vertical row are connected to the iron core (302), the iron core (302) is wound with a coil (304), and the iron core (301) is provided with a plurality of hinge plates (303). A hinge plate (303) is rotatably connected between the slide plate (301) above the hollow shaft portion (204); the mounting component (1) comprises a mounting seat (101), a connecting plate (103) and a mounting tube (104); an annular groove (102) is provided on the upper outer surface of the mounting seat (101); a connecting plate (103) is symmetrically arranged on the top of the mounting seat (101); a mounting tube (104) is fixedly connected to the top of the connecting plate (103); a plug hole (105) is evenly spaced on the lower portion of the mounting tube (104); and a slide groove (106) is evenly spaced on the upper surface of the mounting tube (104).

2. A variable torque permanent magnet brushless motor as claimed in claim 1, characterized in that: The inner end of the top screw I (202) is in the annular groove (102), and the top of the cylinder (201) is symmetrically provided with arc grooves (203), and the connecting plate (103) passes through the arc grooves (203).

3. A variable torque permanent magnet brushless motor as claimed in claim 2, characterized in that: It also includes a bearing seat I (107). The bearing seat I (107) is placed in the installation tube (104), and the bearing seat I (107) is interference-connected with the hollow shaft portion (204).

4. A variable torque permanent magnet brushless motor as claimed in claim 3, characterized in that: The rotor component (4) comprises a rotating shell (401), a partition (402), a magnetic sheet (403), a boss (404) and a top screw II (405); the partition (402) is installed on the inner side of the rotating shell (401); the magnetic sheet (403) is installed in the partition (402); the boss (404) is installed at the top center of the rotating shell (401); and the top screw II (405) is symmetrically arranged on the side of the boss (404) through a thread.

5. A variable torque permanent magnet brushless motor as claimed in claim 4, characterized in that: The shaft component (5) is a rotating shaft (501), and the rotating shaft (501) passes through the lower part of the boss (404) and extends into the hollow shaft part (204).

6. A variable torque permanent magnet brushless motor as claimed in claim 5, characterized in that: It also includes a bearing seat II (205) and an annular cone block (502); the lower part of the rotating shaft (501) is connected to the annular cone block (502) with the cone surface facing downward; the upper part of the hollow shaft (204) is embedded with a bearing seat II (205); the bearing seat II (205) is interference-connected with the rotating shaft (501).

7. A variable torque permanent magnet brushless motor as claimed in claim 6, characterized in that: The invention also comprises a filling component (6), wherein the outer side surface of the installation cylinder (104) is provided with the filling component (6), wherein the filling component (6) comprises a threaded block (601), a protrusion (602), an elastic telescopic rod (603), a filling block (604) and a follower wheel (605), wherein the bottom of the installation cylinder (104) is connected to the threaded block (601) via a thread, and the threaded block (601) is provided with protrusions (602) at even intervals in the circumferential direction, and the installation cylinder (104) above the protrusion (602) is provided with four elastic telescopic rods (603) in a group at even intervals in the circumferential direction, and the end of the elastic telescopic rod (603) is connected to the filling block (604), and the outer side surface of the filling block (604) can be in contact with the iron core (302), and the bottom end of the elastic telescopic rod (603) is connected to the follower wheel (605).

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