Motor driving mechanism having reciprocating extension / retraction and vibration functions

Abstract

The present invention relates to the technical field of motors, and in particular to a motor driving mechanism having reciprocating extension / retraction and vibration functions, comprising an outer frame, a first connecting seat, and a second connecting seat. Guide rails are provided between the first connecting seat and the second connecting seat. The outer frame is slidably arranged on the guide rails. The first connecting seat is provided with an extension / retraction driving assembly. The second connecting seat is provided with a rotating motor. The rotating motor comprises a stator assembly and a driving shaft. The driving shaft is telescopically and movably arranged in the stator assembly. A Hall sensor is provided between the outer frame and the second connecting seat. One end of the driving shaft protruding out of the second connecting seat is provided with an induction magnetic ring that works in conjunction with the Hall sensor. In the present invention, the extension / retraction driving assembly is provided so as to drive the outer frame to move along the guide rails, and the guide rails drive the driving shaft to move synchronously, so that the driving shaft can extend / retract on the rotating motor. In this way, the overall structure has a reciprocating extension / retraction function, thereby improving the efficiency.

Description

A reciprocating telescopic and vibration motor drive mechanism Technical Field

[0001] This invention relates to the field of motor technology, and more specifically to a reciprocating extension and vibration motor drive mechanism. Background Technology

[0002] Electric motors are widely used in various fields. They can make objects rotate, move in a straight line, or vibrate eccentrically when used with an eccentric structure. Technical issues

[0003] Electric toothbrushes require a motor to vibrate and rotate. To improve the brushing effect of electric toothbrushes, electric toothbrushes that can both vibrate and extend have appeared on the market. However, these electric toothbrushes usually use coils and magnets inside the motor to drive the rotor to extend and retract. But this method cannot provide enough extension and retraction for rotation, thus affecting the brushing effect of the electric toothbrush. Technical solutions

[0004] The purpose of this invention is to address the aforementioned shortcomings in the prior art by providing a reciprocating extension and vibration motor drive mechanism.

[0005] The objective of this invention is achieved through the following technical solution: a reciprocating telescopic and vibrating motor drive mechanism, comprising an outer frame, a first connecting seat, and a second connecting seat; a guide rail is provided between the first connecting seat and the second connecting seat; the outer frame is slidably disposed on the guide rail;

[0006] The first connecting seat is provided with a telescopic drive assembly for driving the outer frame to slide; the second connecting seat is provided with a rotary motor;

[0007] The rotary motor includes a stator assembly and a drive shaft rotatably disposed in the stator assembly; the drive shaft is telescopically movably disposed within the stator assembly; one end of the drive shaft protrudes out of the second connecting seat and is rotatably connected to the outer frame;

[0008] One end of the drive shaft protrudes from the second connecting seat and is provided with an induction magnetic ring; a Hall sensor that cooperates with the induction magnetic ring is provided between the outer frame and the second connecting seat.

[0009] The present invention is further configured such that the telescopic drive assembly includes a DC motor, a screw, and a swing block; the DC motor is disposed on a first connecting seat; the screw is connected to the output end of the DC motor; the outer wall of the screw is provided with a reciprocating helical groove; and the swing block is movably disposed in the reciprocating helical groove.

[0010] The outer frame has a receiving groove at one end near the first connecting seat; the screw is telescopically movably disposed in the receiving groove; the swing block is rotatably disposed on the inner wall of the receiving groove.

[0011] The invention is further configured such that the inner wall of the outer frame is provided with a snap-fit ​​component; the snap-fit ​​component is detachably connected to the outer frame; and the swing block is rotatably disposed on the snap-fit ​​component.

[0012] The present invention is further configured such that a rotating groove is provided at one end of the outer frame near the first connecting seat; one end of the drive shaft protrudes from the second connecting seat and is rotatably disposed in the rotating groove; a thrust bearing is provided between one end of the drive shaft and the rotating groove.

[0013] A bolt is provided between one end of the drive shaft and the thrust bearing.

[0014] The present invention is further configured such that the rotary motor further includes a housing; the housing is disposed on the second connecting seat;

[0015] The stator assembly includes a stator core disposed within a housing and a coil wound around the stator core; the drive shaft is disposed within the stator core.

[0016] The present invention is further configured such that a rotor core is sleeved on the drive shaft; a plurality of magnets are provided on the outer wall of the rotor core; the drive shaft, rotor core, and magnets are all rotatably disposed within the stator core; and the drive shaft, rotor core, and magnets are all telescopically disposed within the stator core.

[0017] The present invention is further configured such that the stator core is provided with an insulating frame; the insulating frame is disposed between the stator core and the rotor core.

[0018] The present invention is further configured such that a first bearing is provided between one end of the drive shaft and the housing; and a second bearing is provided between the other end of the drive shaft and the housing.

[0019] The present invention is further configured such that a circuit board is provided at one end of the outer frame near the second connecting seat; one end of the drive shaft passes through the circuit board; and the Hall sensor is disposed on the circuit board.

[0020] The drive shaft is provided with a bracket; the induction magnetic ring is provided on the bracket.

[0021] The present invention is further configured such that: a circuit board is provided at one end of the rotary motor near the outer frame; the Hall sensor is disposed on the circuit board; one end of the drive shaft passes through the circuit board; the drive shaft is provided with a bracket; and the induction magnetic ring is movably disposed on the bracket;

[0022] A piezoelectric ceramic sheet is provided between the induction magnetic ring and the bracket. Beneficial effects

[0023] The beneficial effects of this invention are:

[0024] I. This invention, by setting a telescopic drive component, can drive the outer frame to move along the guide rail, and the guide rail drives the drive shaft to move synchronously, thereby enabling the drive shaft to perform telescopic movements on the rotary motor, thus giving the whole a reciprocating telescopic function and improving efficiency.

[0025] Second, with the cooperation of the stator assembly and the drive shaft, the drive shaft can rotate within the housing of the rotary motor. At the same time, since the drive shaft is telescopically movable within the stator assembly, it vibrates when rotating, thus having a vibration function.

[0026] Third, by controlling the extension and retraction of the drive shaft within the housing of the rotating motor, energy loss can be effectively reduced, and noise can also be effectively reduced.

[0027] Fourth, this invention allows the Hall sensor and the induction magnetic ring to be placed outside the rotating motor, which facilitates cleaning, maintenance and replacement of parts. Attached Figure Description

[0028] The invention will be further illustrated with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the invention. For those skilled in the art, other drawings can be obtained based on the following drawings without any creative effort.

[0029] Figure 1 is a structural schematic diagram of Embodiment 1;

[0030] Figure 2 is a cross-sectional view of this embodiment 1;

[0031] Figure 3 is a magnified view of part A in Figure 2;

[0032] Figure 4 is a structural schematic diagram of the telescopic drive assembly of the present invention;

[0033] Figure 5 is a cross-sectional view of this embodiment 2;

[0034] Figure 6 is a magnified view of part B in Figure 5;

[0035] The components include: 1. Outer frame; 11. Receiving groove; 12. Snap-fit ​​component; 13. Rotating groove; 14. Thrust bearing; 21. First connecting seat; 22. Second connecting seat; 23. Guide rail; 3. Drive shaft; 31. Bolt; 41. Circuit board; 42. Hall sensor; 43. Bracket; 44. Induction magnetic ring; 51. DC motor; 52. Screw; 53. Swing block; 54. Reciprocating spiral groove; 6. Housing; 61. Stator core; 62. Insulating frame; 71. Rotor core; 72. Magnet; 81. First bearing; 82. Second bearing; 9. Piezoelectric ceramic sheet. Embodiments of the present invention

[0036] The present invention will be further described in conjunction with the following embodiments.

[0037] Example 1, as shown in Figures 1 to 4, describes a reciprocating telescopic and vibrating motor drive mechanism, which includes an outer frame 1, a first connecting seat 21, and a second connecting seat 22; a guide rail 23 is provided between the first connecting seat 21 and the second connecting seat 22; the outer frame 1 is slidably disposed on the guide rail 23.

[0038] The first connecting seat 21 is provided with a telescopic drive assembly for driving the outer frame 1 to slide; the second connecting seat 22 is provided with a rotary motor; wherein the rotary motor can be a three-phase servo motor;

[0039] The rotary motor includes a stator assembly and a drive shaft 3 rotatably disposed in the stator assembly; the drive shaft 3 is telescopically disposed within the stator assembly; one end of the drive shaft 3 protrudes out of the second connecting seat 22 and is rotatably connected to the outer frame 1.

[0040] One end of the drive shaft 3 protrudes from the second connecting seat 22 and is provided with a sensing magnetic ring 44; a Hall sensor 42 that cooperates with the sensing magnetic ring 44 is provided between the outer frame 1 and the second connecting seat 22.

[0041] Specifically, in this embodiment, the reciprocating telescopic and vibrating motor drive mechanism allows the telescopic drive assembly to move the outer frame 1 along the guide rail 23 during use. The guide rail 23 then drives the drive shaft 3 to move synchronously, enabling the drive shaft 3 to telescopically extend and retract on the rotary motor. The other end of the drive shaft 3 protrudes from the housing 6 of the rotary motor and connects to the toothbrush head, thus enabling the electric toothbrush to have a reciprocating telescopic function and improving its efficiency. Furthermore, with the cooperation of the stator assembly and the drive shaft 3, the drive shaft 3 can rotate within the housing 6 of the rotary motor. Since the telescopic movement of the drive shaft 3 is located within the stator assembly, the drive shaft 3 vibrates during rotation, thus enabling the electric toothbrush to have a vibrating function. Additionally, the telescopic drive assembly and the rotary motor can also work independently, allowing the drive shaft 3 to telescopically extend or rotate.

[0042] Secondly, this embodiment controls the drive shaft 3 to extend and retract within the housing 6 of the rotary motor, rather than driving the entire rotary motor to reciprocate, which effectively reduces energy loss and noise.

[0043] Finally, based on the above, the Hall sensor 42 can be placed between the outer frame 1 and the second connecting seat 22, and the sensing magnetic ring 44 can be placed at the position where the drive shaft 3 protrudes from the second connecting seat 22. With the cooperation of the Hall sensor 42 and the sensing magnetic ring 44, the vibration amplitude of the drive shaft 3 can be controlled. In traditional rotary motors, the Hall sensor 42 and the sensing magnetic ring 44 are built inside the rotary motor, which has the problems of being difficult to clean, maintain, and replace. However, in this embodiment, the Hall sensor 42 and the sensing magnetic ring 44 can be placed outside the rotary motor, which is convenient for cleaning, maintenance, and replacement of parts.

[0044] This embodiment describes a reciprocating telescopic and vibrating motor drive mechanism. The telescopic drive assembly includes a DC motor 51, a screw 52, ​​and a swing block 53. The DC motor 51 is mounted on a first connecting seat 21. The screw 52 is connected to the output end of the DC motor 51. The outer wall of the screw 52 is provided with a reciprocating spiral groove 54. The swing block 53 is movably mounted in the reciprocating spiral groove 54. The DC motor 51 can be a brushed motor.

[0045] The outer frame 1 has a receiving groove 11 at one end near the first connecting seat 21; the screw 52 is telescopically movably disposed in the receiving groove 11; the swing block 53 is rotatably disposed on the inner wall of the receiving groove 11.

[0046] Specifically, with the above configuration, when the drive shaft 3 needs to extend or retract, the DC motor 51 is started, driving the screw 52 to rotate. Since the outer wall of the screw 52 has a reciprocating helical groove 54, and the outer frame 1 has a rotating swing block 53 that moves within the reciprocating helical groove 54, the rotation of the screw 52 converts the circular motion into the axial up-and-down extension / retraction motion of the outer frame 1, thereby driving the drive shaft 3 to extend or retract. Furthermore, to make the overall structure more stable, a speed reducer can be installed between the DC motor 51 and the screw 52, ​​allowing the DC motor 51 to drive the screw 52 to rotate via the speed reducer. In this embodiment, by configuring the DC motor 51 and the screw 52, ​​the outer frame 1 can be driven to perform linear motion, which in turn drives the Hall sensor 42 and the drive shaft 3 to perform linear motion, thus ensuring that the reciprocating extension / retraction and vibration motor drive mechanism has sufficient extension and retraction range.

[0047] The reciprocating telescopic and vibrating motor drive mechanism described in this embodiment includes a snap-fit ​​member 12 on the inner wall of the outer frame 1; the snap-fit ​​member 12 is detachably connected to the outer frame 1; and the swing block 53 is rotatably mounted on the snap-fit ​​member 12. This arrangement facilitates the maintenance and replacement of the swing block 53.

[0048] In this embodiment, a reciprocating telescopic and vibrating motor drive mechanism is provided, wherein the outer frame 1 has a rotating groove 13 at one end near the first connecting seat 21; one end of the drive shaft 3 protrudes from the second connecting seat 22 and is rotatably disposed in the rotating groove 13; and a thrust bearing 14 is provided between one end of the drive shaft 3 and the rotating groove 13.

[0049] A bolt 31 is provided between one end of the drive shaft 3 and the thrust bearing 14. The bolt 31 facilitates the fixing of the drive shaft 3 to the inner ring of the thrust bearing 14.

[0050] Specifically, in this embodiment, by setting a thrust bearing 14, the number of thrust bearings 14 can be two. The thrust bearings 14 on both sides can ensure that the axial push-pull force of the drive shaft 3 is greater than or equal to 10Kg.f; at the same time, it can separate the radial sweep vibration and axial displacement of the drive shaft 3, so that they do not interfere with each other; and make the overall structure more stable and reliable.

[0051] This embodiment describes a reciprocating telescopic and vibrating motor drive mechanism. The rotary motor further includes a housing 6; the housing 6 is disposed on a second connecting seat 22; the stator assembly includes a stator core 61 disposed within the housing 6 and a coil wound around the stator core 61; the drive shaft 3 is disposed within the stator core 61. In this embodiment, the drive shaft 3 is fitted with a rotor core 71; the outer wall of the rotor core 71 is provided with a plurality of magnets 72; the drive shaft 3, rotor core 71, and magnets 72 are all rotatably disposed within the stator core 61; the drive shaft 3, rotor core 71, and magnets 72 are all telescopically movable within the stator core 61; the coil is not shown in the figure.

[0052] Specifically, the stator core 61, rotor core 71, magnet 72, housing 6, outer frame 1, screw 52, ​​and DC motor 51 are all set with the drive shaft 3 as the axis, making the overall structure stable and reliable.

[0053] When the drive shaft 3 needs to vibrate or rotate, the coil is energized to generate a magnetic field. The magnetic field of the coil and the magnetic field of the magnet 72 work together to enable the drive shaft 3 to rotate or vibrate.

[0054] The reciprocating telescopic and vibrating motor drive mechanism described in this embodiment includes an insulating frame 62 on the stator core 61, which is located between the stator core 61 and the rotor core 71. Specifically, this arrangement ensures the insulation performance between the stator core 61 and the rotor core 71.

[0055] This embodiment describes a reciprocating telescopic and vibrating motor drive mechanism, wherein a first bearing 81 is provided between one end of the drive shaft 3 and the housing 6; and a second bearing 82 is provided between the other end of the drive shaft 3 and the housing 6. Specifically, through the above arrangement, the drive shaft 3 can stably rotate between the first bearing 81 and the second bearing 82, and the drive shaft 3 can also stably telescopically move between the first bearing 81 and the second bearing 82.

[0056] This embodiment describes a reciprocating telescopic and vibrating motor drive mechanism. The outer frame 1 has a circuit board 41 at one end near the second connecting seat 22. One end of the drive shaft 3 passes through the circuit board 41. A Hall sensor 42 is mounted on the circuit board 41. The drive shaft 3 has a bracket 43. A sensing magnetic ring 44 is mounted on the bracket 43. The bracket 43 is fixed to the drive shaft 3, allowing the sensing magnetic ring 44 and the bracket 43 to move with the drive shaft 3. Furthermore, the Hall sensor 42, circuit board 41, drive shaft 3, bracket 43, and sensing magnetic ring 44 move synchronously, ensuring a constant distance between the sensing magnetic ring 44 and the Hall sensor 42, thus guaranteeing accurate sensing. Specifically, this embodiment, through the above arrangement, places the Hall sensor 42 and the sensing magnetic ring 44 outside the rotary motor, facilitating cleaning, maintenance, and parts replacement.

[0057] Example 2, as shown in Figures 5 and 6, describes a reciprocating telescopic and vibrating motor drive mechanism. The rotary motor has a circuit board 41 at one end near the outer frame 1; a Hall sensor 42 is mounted on the circuit board 41; one end of the drive shaft 3 passes through the circuit board 41; the drive shaft 3 has a bracket 43; and a sensing magnetic ring 44 is movably mounted on the bracket 43.

[0058] A piezoelectric ceramic sheet 9 is provided between the induction magnetic ring 44 and the bracket 43.

[0059] Specifically, unlike Embodiment 1, this embodiment places the circuit board 41 on the housing 6 of the rotary motor. Since the Hall sensor 42 is a precision device, in Embodiment 1, the Hall sensor 42 will continuously reciprocate along with the circuit and the outer frame 1, which can easily lead to damage to the Hall sensor 42.

[0060] In this embodiment, by fixing the circuit board 41 and the Hall sensor 42 to the bottom of the housing 6 of the rotary motor, the Hall sensor 42 can be prevented from moving, effectively protecting the Hall sensor 42. During the extension and retraction of the drive shaft 3, the relative distance between the Hall sensor 42 and the magnetic ring changes. Therefore, this embodiment sets a piezoelectric ceramic sheet 9 between the sensing magnetic ring 44 and the bracket 43, so that the thickness of the piezoelectric ceramic sheet 9 can change according to the extension and retraction of the drive shaft 3, so as to ensure that the relative distance between the Hall sensor 42 and the sensing magnetic ring 44 is consistent, thereby ensuring the stability of the system.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A reciprocating telescopic and vibrating motor drive mechanism, characterized in that: It includes an outer frame (1), a first connecting seat (21) and a second connecting seat (22); a guide rail (23) is provided between the first connecting seat (21) and the second connecting seat (22); the outer frame (1) is slidably mounted on the guide rail (23); The first connecting seat (21) is provided with a telescopic drive assembly for driving the outer frame (1) to slide; the second connecting seat (22) is provided with a rotary motor; The rotary motor includes a stator assembly and a drive shaft (3) rotatably disposed on the stator assembly; the drive shaft (3) is telescopically disposed within the stator assembly; one end of the drive shaft (3) protrudes out of the second connecting seat (22) and is rotatably connected to the outer frame (1); One end of the drive shaft (3) protrudes from the second connecting seat (22) and is provided with an induction magnetic ring (44); a Hall sensor (42) that cooperates with the induction magnetic ring (44) is provided between the outer frame (1) and the second connecting seat (22).

2. The reciprocating telescopic and vibration motor drive mechanism according to claim 1, characterized in that: The telescopic drive assembly includes a DC motor (51), a screw (52), and a swing block (53); the DC motor (51) is mounted on the first connecting seat (21); the screw (52) is connected to the output end of the DC motor (51); the outer wall of the screw (52) is provided with a reciprocating spiral groove (54); the swing block (53) is movably mounted in the reciprocating spiral groove (54); The outer frame (1) has a receiving groove (11) at one end near the first connecting seat (21); the screw (52) is telescopically movably disposed in the receiving groove (11); the swing block (53) is rotatably disposed on the inner wall of the receiving groove (11).

3. The reciprocating telescopic and vibration motor drive mechanism according to claim 2, characterized in that: The inner wall of the outer frame (1) is provided with a snap-fit ​​member (12); the snap-fit ​​member (12) is detachably connected to the outer frame (1); the swing block (53) is rotatably disposed on the snap-fit ​​member (12).

4. The reciprocating telescopic and vibration motor drive mechanism according to claim 1, characterized in that: The outer frame (1) has a rotating groove (13) at one end near the first connecting seat (21); one end of the drive shaft (3) protrudes from the second connecting seat (22) and is rotatably disposed in the rotating groove (13); a thrust bearing (14) is provided between one end of the drive shaft (3) and the rotating groove (13); A bolt (31) is provided between one end of the drive shaft (3) and the thrust bearing (14).

5. The reciprocating telescopic and vibration motor drive mechanism according to claim 1, characterized in that: The rotary motor also includes a housing (6); the housing (6) is disposed on the second connecting seat (22); The stator assembly includes a stator core (61) disposed within the housing (6) and a coil wound around the stator core (61); the drive shaft (3) is disposed within the stator core (61).

6. The reciprocating telescopic and vibration motor drive mechanism according to claim 5, characterized in that: The drive shaft (3) is fitted with a rotor core (71); the outer wall of the rotor core (71) is provided with a plurality of magnets (72); the drive shaft (3), rotor core (71) and magnets (72) are all rotatably disposed within the stator core (61); the drive shaft (3), rotor core (71) and magnets (72) are all telescopically disposed within the stator core (61).

7. The reciprocating telescopic and vibration motor drive mechanism according to claim 6, characterized in that: The stator core (61) is provided with an insulating frame (62); the insulating frame (62) is located between the stator core (61) and the rotor core (71).

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

9. The reciprocating telescopic and vibrating motor drive mechanism according to claim 1, characterized in that: The outer frame (1) has a circuit board (41) at one end near the second connecting seat (22); one end of the drive shaft (3) passes through the circuit board (41); the Hall sensor (42) is located on the circuit board (41); The drive shaft (3) is provided with a bracket (43); the induction magnetic ring (44) is provided on the bracket (43).

10. The reciprocating telescopic and vibration motor drive mechanism according to claim 1, characterized in that: The rotary motor has a circuit board (41) at one end near the outer frame (1); the Hall sensor (42) is located on the circuit board (41); one end of the drive shaft (3) passes through the circuit board (41); the drive shaft (3) has a bracket (43); the induction magnetic ring (44) is movably located on the bracket (43); A piezoelectric ceramic sheet (9) is provided between the induction magnetic ring (44) and the bracket (43).

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