Reciprocating and vibrating motor-driven mechanism

Abstract

The present invention relates to the motor technology field, and more specifically to a motor drive mechanism that reciprocates, extends, and vibrates, comprising an outer frame, a first connecting base, and a second connecting base, wherein a guide rail is provided between the first and second connecting bases, the outer frame is slidably mounted on the guide rail, an extension drive assembly is provided on the first connecting base, and a rotary motor is provided on the second connecting base, the rotary motor comprises a stator assembly and a drive shaft, the drive shaft is movably mounted within the stator assembly to extend and retract, a Hall sensor is provided between the outer frame and the second connecting base, and one end of the drive shaft protrudes from the second connecting base, after which an inductive magnetic ring is provided to be combined with the Hall sensor. The present invention provides an extension drive assembly, which allows the outer frame to be driven to move along the guide rail, and the drive shaft is driven to move synchronously by the guide rail, thereby allowing the drive shaft to perform an extension and retraction motion on the rotary motor, thus providing a reciprocating extension and retraction function as a whole and improving efficiency.

Description

Technical Field

[0001] The present invention relates to the field of motor technology, and more specifically, to a motor drive mechanism that reciprocates and vibrates.

Background Art

[0002] Motors are widely used in various fields. A motor can rotate an object, move an object linearly, or vibrate an object eccentrically together with an eccentric structure.

[0003] In the case of an electric toothbrush, a motor is required for vibration and rotation. In order to improve the brushing effect of the electric toothbrush, currently, an electric toothbrush that can vibrate and expand / contract is on the market. However, this electric toothbrush usually drives the rotor to expand / contract using a coil and an electromagnetic steel structure inside the motor. But in this method, a sufficient amount of expansion / contract for rotation cannot be provided, thus affecting the brushing effect of the electric toothbrush.

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide a motor drive mechanism that reciprocates and vibrates to address the deficiencies in the prior art.

Means for Solving the Problems

[0005] The object of the present invention is realized by the following technical solution: A motor drive mechanism that reciprocates and vibrates, comprising an outer frame, a first connecting base, and a second connecting base, wherein a guide rail is provided between the first and second connecting bases, the outer frame is slidably mounted on the guide rail, the first connecting base is provided with an extension drive assembly for driving the outer frame to slide, a rotary motor is provided on the second connecting base, the rotary motor comprises a stator assembly and a drive shaft rotatably mounted on the stator assembly, the drive shaft is movably mounted within the stator assembly in an extendable and retractable manner, one end of the drive shaft protrudes from the second connecting base and is rotatably connected to the outer frame, the other end of the drive shaft protrudes from the second connecting base and is provided with an induction magnetic ring, and a Hall sensor in combination with the induction magnetic ring is provided between the outer frame and the second connecting base.

[0006] In the present invention, the telescopic drive assembly further includes a DC motor, a screw, and a rocking block, wherein the DC motor is mounted on a first connecting base, the screw is connected to the output terminal of the DC motor, a reciprocating spiral groove is provided on the outer wall of the screw, the rocking block is movably mounted in the reciprocating spiral groove, a housing groove is opened at one end of the outer frame near the first connecting base, the screw is movably mounted in the housing groove by extending and retracting, and the rocking block is rotatably mounted on the inner wall of the housing groove.

[0007] In the present invention, a fastening member is provided on the inner wall of the outer frame, the fastening member is detachably connected to the outer frame, and the rocking block is rotatably mounted on the fastening member.

[0008] In the present invention, a rotating groove is provided at one end of the outer frame near the first connecting base, one end of the drive shaft protrudes from the second connecting base and then rotates into the rotating groove, a thrust bearing is provided between one end of the drive shaft and the rotating groove, and a bolt is provided between one end of the drive shaft and the thrust bearing.

[0009] In the present invention, the rotary motor further includes a case, the case is mounted on a second mounting base, the stator assembly includes a stator core provided within the case and coils wound around the stator core, and the drive shaft is provided within the stator core.

[0010] In the present invention, a rotor core is further fitted onto the drive shaft, a plurality of electromagnetic steels are provided on the outer wall of the rotor core, the drive shaft, rotor core and electromagnetic steels are all rotatably provided within the stator core, and the drive shaft, rotor core and electromagnetic steels are all movably provided within the stator core by expanding and contracting.

[0011] In this invention, an insulator is further provided on the stator core, and the insulator is provided between the stator core and the rotor core.

[0012] In the present invention, a first bearing is provided between the drive shaft and one end of the case, and a second bearing is provided between the drive shaft and the other end of the case.

[0013] In the present invention, a circuit board is further provided at one end of the outer frame near the second connection base, one end of the drive shaft is drilled into the circuit board, the Hall sensor is provided on the circuit board, a holder is provided on the drive shaft, and the induction magnetic ring is provided on the holder.

[0014] In the present invention, a circuit board is provided at one end of the rotary motor near the outer frame, the Hall sensor is provided on the circuit board, one end of the drive shaft is drilled into the circuit board, a holder is provided on the drive shaft, the induction magnetic ring is movably provided on the holder, and a piezoelectric ceramic sheet is provided between the induction magnetic ring and the holder. [Effects of the Invention]

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. By providing an extendable drive assembly, the outer frame can be driven to move along a guide rail, and the drive shaft is driven to move synchronously by the guide rail, thereby enabling the drive shaft to perform an extendable motion with a rotary motor, and the overall function of reciprocating extendable movement is improved.

[0017] 2. The combination of the stator assembly and the drive shaft allows the drive shaft to rotate within the case of the rotary motor, and because the drive shaft is movable and expandable within the stator assembly, it generates vibration when the drive shaft rotates, thus providing a vibration function.

[0018] 3. By controlling the drive shaft to perform an extension and retraction motion within the case of the rotary motor, energy consumption can be effectively reduced, and noise can also be effectively reduced.

[0019] 4. The present invention allows the Hall sensor and induction magnetic ring to be mounted outside the rotary motor, making it easy to clean, maintain, and replace the parts. [Brief explanation of the drawing]

[0020] The invention will be further explained with reference to the drawings, but the embodiments in the drawings do not constitute any limitation to the present invention, and those skilled in the art can obtain other drawings based on the following drawings without expending any creative effort. [Figure 1] This is a schematic diagram of the structure of Example 1. [Figure 2] This is a cross-sectional view of Example 1. [Figure 3] This is a magnified view of a portion of area A in Figure 2. [Figure 4] This is a schematic diagram of the structure of the telescopic drive assembly of the present invention. [Figure 5] This is a cross-sectional view of Example 2. [Figure 6] This is a magnified view of a portion of area B in Figure 5. [Modes for carrying out the invention]

[0021] The present invention will be further described while referring to the following embodiments.

Embodiment

[0022] Regarding Embodiment 1, as can be seen from FIGS. 1 to 4, it is a reciprocating telescopic and vibrating motor drive mechanism described in this embodiment, including an outer frame 1, a first connection base 21, and a second connection base 22. A guide rail 23 is provided between the first connection base 21 and the second connection base 22. The outer frame 1 is provided slidably on the guide rail 23. An expansion and contraction drive assembly for driving the outer frame 1 to slide is provided on the first connection base 21. A rotating motor is provided on the second connection base 22. The rotating motor may be a three-phase servo motor. The rotating motor includes a stator assembly and a drive shaft 3 rotatably provided in the stator assembly. The drive shaft 3 is telescopically and movably provided in the stator assembly. One end of the drive shaft 3 protrudes from the second connection base 22 and is then rotatably connected to the outer frame 1. After one end of the drive shaft 3 protrudes from the second connection base 22, an induction magnetic ring 44 is provided. A hall sensor 42 combined with the induction magnetic ring 44 is provided between the outer frame 1 and the second connection base 22.

[0023] Specifically, when using the reciprocating and vibrating motor drive mechanism described in this embodiment, the retractable drive assembly can drive the outer frame 1 along the guide rail 23, which in turn drives the drive shaft 3 to move synchronously. This allows the drive shaft 3 to perform retraction and extension motion in response to the rotary motor. The other end of the drive shaft 3 protrudes from the case 6 of the rotary motor and is then connected to the toothbrush head. This allows the electric toothbrush to have a reciprocating and extension function, improving its efficiency. Furthermore, the combination of the stator assembly and the drive shaft 3 allows the drive shaft 3 to rotate within the case 6 of the rotary motor. Since the drive shaft 3 is movably provided within the stator assembly, vibration is generated when the drive shaft 3 rotates, giving the electric toothbrush a vibrating function. In addition, the retractable drive assembly and the rotary motor can operate independently, thereby allowing the drive shaft 3 to retract or rotate.

[0024] Next, in this embodiment, instead of driving the entire rotary motor to reciprocate, the drive shaft 3 is controlled to perform an extension and retraction motion within the case 6 of the rotary motor, thereby effectively reducing energy consumption and noise.

[0025] Finally, in addition to the above, the Hall sensor 42 can be installed between the outer frame 1 and the second connecting base 22, and the induction magnetic ring 44 can be installed in a position protruding from the second connecting base 22 of the drive shaft 3. By combining the Hall sensor 42 and the induction magnetic ring 44, the amplitude of vibration of the drive shaft 3 can be controlled. Conventional rotary motors have Hall sensors 42 and induction magnetic rings 44 built inside the rotary motor, which presents problems in terms of cleaning, maintenance, and replacement of the parts. On the other hand, in this embodiment, the Hall sensor 42 and induction magnetic ring 44 can be installed outside the rotary motor, making cleaning, maintenance, and replacement of the parts easy.

[0026] The motor drive mechanism described in this embodiment reciprocates and vibrates, wherein the retractable drive assembly includes a DC motor 51, a screw 52, ​​and a rocking block 53, the DC motor 51 being provided on a first connection base 21, the screw 52 being connected to the output terminal of the DC motor 51, a reciprocating spiral groove 54 being provided on the outer wall of the screw 52, ​​the rocking block 53 being movably provided in the reciprocating spiral groove 54, the DC motor 51 may be a brushed motor, a housing groove 11 being opened at one end of the outer frame 1 closest to the first connection base 21, the screw 52 being movably provided in the housing groove 11 by extending and retracting, and the rocking block 53 being rotatably provided on the inner wall of the housing groove 11.

[0027] Specifically, in the above-described installation, if the drive shaft 3 needs to perform an extension and retraction motion, the DC motor 51 is started, which drives the DC motor 51 to rotate the screw 52. A reciprocating helical groove 54 is provided on the outer wall of the screw 52, ​​and a oscillating block 53 is rotated and provided inside the outer frame 1. Since the oscillating block 53 moves along the reciprocating helical groove 54, when the screw 52 rotates, the circular motion can be converted into vertical extension and retraction motion in the axial direction of the outer frame 1. This allows the drive shaft 3 to be driven to perform an extension and retraction motion. Furthermore, to further stabilize the overall structure, a reduction gear may be provided between the DC motor 51 and the screw 52, ​​and the DC motor 51 drives the screw 52 to rotate via the reduction gear. In this embodiment, by providing the DC motor 51 and the screw 52, ​​the outer frame 1 can be driven to perform linear motion, and the Hall sensor 42 and the drive shaft 3 are driven to perform linear motion by the outer frame 1. As a result, the drive mechanism of the reciprocating extension and retraction and vibrating motor has a sufficient amount of extension and retraction.

[0028] The motor drive mechanism described in this embodiment is reciprocating, retracting, and vibrating, wherein a fastening member 12 is provided on the inner wall of the outer frame 1, the fastening member 12 is detachably connected to the outer frame 1, and the oscillating block 53 is rotatably mounted on the fastening member 12. With the above-described installation, maintenance and replacement of the oscillating block 53 are easy.

[0029] The motor drive mechanism described in this embodiment, which reciprocates, extends, and vibrates, has a rotating groove 13 at one end of the outer frame 1 near the first connecting base 21, one end of the drive shaft 3 protrudes from the second connecting base 22 and then rotates into the rotating groove 13, a thrust bearing 14 is provided between one end of the drive shaft 3 and the rotating groove 13, and a bolt 31 is provided between one end of the drive shaft 3 and the thrust bearing 14. By providing the bolt 31, the drive shaft 3 and the inner ring of the thrust bearing 14 are easily fixed.

[0030] Specifically, this embodiment is provided with thrust bearings 14, and there may be two thrust bearings 14. This ensures that the axial pushing and pulling force of the drive shaft 3 is 10 kg.f or more for both thrust bearings 14, and allows the radial sweep vibration and axial displacement of the drive shaft 3 to be independent, preventing interference with each other and making the overall structure more stable.

[0031] The motor drive mechanism described in this embodiment, which reciprocates, extends and retracts and vibrates, wherein the rotary motor further includes a case 6, the case 6 is provided on a second connecting base 22, the stator assembly includes a stator core 61 provided in the case 6 and a coil wound around the stator core 61, and the drive shaft 3 is provided in the stator core 61. The motor drive mechanism described in this embodiment, which reciprocates, extends and retracts and vibrates, wherein a rotor core 71 is fitted onto the drive shaft 3, a plurality of electromagnetic steels 72 are provided on the outer wall of the rotor core 71, the drive shaft 3, the rotor core 71 and the electromagnetic steels 72 are all rotatably provided in the stator core 61, the drive shaft 3, the rotor core 71 and the electromagnetic steels 72 are all movably provided in the stator core 61 to extend and retract, and the coil is not shown.

[0032] Specifically, the stator core 61, rotor core 71, electrical steel 72, case 6, outer frame 1, screw 52, ​​and DC motor 51 are all mounted with the drive shaft 3 as their axis, stabilizing the overall structure.

[0033] When the drive shaft 3 needs to vibrate or rotate, a magnetic field is generated by energizing the coil, and by combining this with the magnetic field of the electromagnetic steel 72, the drive shaft 3 can rotate or vibrate.

[0034] The motor drive mechanism described in this embodiment is reciprocating, extending, and vibrating, wherein an insulator 62 is provided on the stator core 61, and the insulator 62 is provided between the stator core 61 and the rotor core 71. Specifically, the above-described installation ensures insulation performance between the stator core 61 and the rotor core 71.

[0035] In this embodiment, a motor drive mechanism that reciprocates, extends, and vibrates is provided, wherein a first bearing 81 is provided between the drive shaft 3 and one end of the case 6, and a second bearing 82 is provided between the drive shaft 3 and the other end of the case 6. Specifically, with the above-described setup, the drive shaft 3 can rotate stably between the first bearing 81 and the second bearing 82, and the drive shaft 3 can perform stably extending and retracting motion between the first bearing 81 and the second bearing 82.

[0036] The motor drive mechanism described in this embodiment reciprocates and vibrates, with a circuit board 41 provided at one end of the outer frame 1 near the second connection base 22, one end of the drive shaft 3 drilled into the circuit board 41, the Hall sensor 42 provided on the circuit board 41, a holder 43 provided on the drive shaft 3, the induction magnetic ring 44 provided on the holder 43, the holder 43 fixed to the drive shaft 3, the induction magnetic ring 44 and the holder 43 being able to move in conjunction with the drive shaft 3, and the Hall sensor 42, circuit board 41, drive shaft 3, holder 43 and induction magnetic ring 44 moving synchronously, thereby ensuring that the distance between the induction magnetic ring 44 and the Hall sensor 42 does not change, and thus ensuring induction accuracy. Specifically, in this embodiment, with the above-described setup, the Hall sensor 42 and the induction magnetic ring 44 are provided outside the rotary motor, making cleaning, maintenance, and replacement of parts easy. [Examples]

[0037] Regarding Embodiment 2, as shown in Figures 5 and 6, the motor drive mechanism described in this embodiment is a reciprocating, retractable, and vibrating motor drive mechanism, wherein a circuit board 41 is provided at one end of the rotary motor closest to the outer frame 1, the Hall sensor 42 is provided on the circuit board 41, one end of the drive shaft 3 is drilled into the circuit board 41, a holder 43 is provided on the drive shaft 3, the induction magnetic ring 44 is movably provided on the holder 43, and a piezoelectric ceramic sheet 9 is provided between the induction magnetic ring 44 and the holder 43.

[0038] Specifically, the differences from Example 1 are as follows: In this embodiment, the circuit board 41 is mounted in the case 6 of the rotary motor, and the Hall sensor 42 is a precision instrument. In Example 1, the Hall sensor 42 constantly reciprocates in conjunction with the circuit and outer frame 1, which can easily cause damage to the Hall sensor 42.

[0039] On the other hand, in this embodiment, by fixing the circuit board 41 and the Hall sensor 42 to the bottom of the case 6 of the rotary motor, the movement of the Hall sensor 42 can be stopped, effectively protecting the Hall sensor 42. Since the relative distance between the Hall sensor 42 and the magnetic ring changes during the extension and retraction process of the drive shaft 3, in this embodiment, by providing a piezoelectric ceramic sheet 9 between the induction magnetic ring 44 and the holder 43, the piezoelectric ceramic sheet 9 can change its own thickness in accordance with the extension and retraction of the drive shaft 3, ensuring that the relative distance between the Hall sensor 42 and the induction magnetic ring 44 is kept constant, and ensuring the stability of the system.

[0040] Finally, it should be noted that the above embodiments are not intended to limit the scope of protection of the present invention, but merely to illustrate the technical concept of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, as those skilled in the art will understand, modifications or equivalent substitutions can be made to the technical concept of the present invention, as long as they do not deviate from the substance and scope of the technical concept. [Explanation of Symbols]

[0041] 1. Outer frame 11. Storage groove 12. Attachment 13 rotating grooves 14 Thrust bearings 21 First connection unit 22 Second connection unit 23 Guide rails 3 drive shafts 31 volts 41 Circuit board 42 Hall sensors 43 Holder 44 Induction Magnetic Ring 51 DC motor 52 Screw 53. Oscillating block 54 Reciprocating spiral groove 6 cases 61 Stator Core 62 Insulators 71 Rotor Core 72 Electromagnetic steel 81 First bearing 82 Second bearing 9. Piezoelectric ceramic sheet

Claims

1. A motor drive mechanism that reciprocates, extends and retracts and vibrates, comprising an outer frame (1), a first connecting base (21), and a second connecting base (22), wherein a guide rail (23) is provided between the first connecting base (21) and the second connecting base (22), and the outer frame (1) is slidably mounted on the guide rail (23). The first connecting base (21) is provided with an extendable drive assembly for driving the outer frame (1) to slide, and the second connecting base (22) is provided with a rotary motor. The rotary motor includes a stator assembly and a drive shaft (3) that is rotatably mounted on the stator assembly, the drive shaft (3) being movable and extendable within the stator assembly, and one end of the drive shaft (3) protruding from a second connecting base (22) and then rotatably connected to an outer frame (1). A motor drive mechanism that reciprocates, extends, and vibrates, characterized in that one end of the drive shaft (3) protrudes from the second connecting base (22), and an induction magnetic ring (44) is provided thereafter, and a Hall sensor (42) that is combined with the induction magnetic ring (44) is provided between the outer frame (1) and the second connecting base (22).

2. The telescopic drive assembly includes a DC motor (51), a screw (52), and a rocking block (53), wherein the DC motor (51) is mounted on a first connecting base (21), the screw (52) is connected to the output terminal of the DC motor (51), a reciprocating spiral groove (54) is provided on the outer wall of the screw (52), and the rocking block (53) is movably mounted in the reciprocating spiral groove (54). The motor drive mechanism for reciprocating extension and vibration according to claim 1, characterized in that a housing groove (11) is opened at one end of the outer frame (1) near the first connecting base (21), the screw (52) is movably provided in the housing groove (11) so as to extend and retract, and the oscillating block (53) is rotatably provided on the inner wall of the housing groove (11).

3. The motor drive mechanism for reciprocating extension and vibration according to claim 2, characterized in that a fastening member (12) is provided on the inner wall of the outer frame (1), the fastening member (12) is detachably connected to the outer frame (1), and the oscillating block (53) is rotatably mounted on the fastening member (12).

4. A rotating groove (13) is provided at one end of the outer frame (1) closest to the first connecting base (21), and one end of the drive shaft (3) protrudes from the second connecting base (22) and then rotates into the rotating groove (13), and a thrust bearing (14) is provided between one end of the drive shaft (3) and the rotating groove (13). The motor drive mechanism for reciprocating extension and vibration according to claim 1, characterized in that a bolt (31) is provided between one end of the drive shaft (3) and the thrust bearing (14).

5. The rotary motor further includes a case (6), the case (6) is mounted on a second connecting base (22), The motor drive mechanism for reciprocating extension and vibration according to claim 1, characterized in that the stator assembly includes a stator core (61) provided in a case (6) and a coil wound around the stator core (61), and the drive shaft (3) is provided in the stator core (61).

6. The motor drive mechanism for reciprocating extension and vibration according to claim 5, characterized in that a rotor core (71) is fitted onto the drive shaft (3), a plurality of electromagnetic steels (72) are provided on the outer wall of the rotor core (71), the drive shaft (3), the rotor core (71), and the electromagnetic steels (72) are all rotatably provided within a stator core (61), and the drive shaft (3), the rotor core (71), and the electromagnetic steels (72) are all movably provided within the stator core (61) by extending and retracting.

7. The motor drive mechanism for reciprocating extension and vibration according to claim 6, characterized in that an insulator (62) is provided on the stator core (61), and the insulator (62) is provided between the stator core (61) and the rotor core (71).

8. The motor drive mechanism for reciprocating extension and vibration according to claim 5, characterized in that a first bearing (81) is provided between the drive shaft (3) and one end of the case (6), and a second bearing (82) is provided between the drive shaft (3) and the other end of the case (6).

9. A circuit board (41) is provided at one end of the outer frame (1) near the second connection base (22), one end of the drive shaft (3) is drilled into the circuit board (41), and the Hall sensor (42) is provided on the circuit board (41). The motor drive mechanism for reciprocating extension and vibration according to claim 1, characterized in that a holder (43) is provided on the drive shaft (3), and the induction magnetic ring (44) is provided on the holder (43).

10. A circuit board (41) is provided at one end of the rotary motor closest to the outer frame (1), the Hall sensor (42) is provided on the circuit board (41), one end of the drive shaft (3) is drilled into the circuit board (41), a holder (43) is provided on the drive shaft (3), and the induction magnetic ring (44) is movably provided on the holder (43). The motor drive mechanism for reciprocating extension and vibration according to claim 1, characterized in that a piezoelectric ceramic sheet (9) is provided between the induction magnetic ring (44) and the holder (43).

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