A reciprocating telescopic and vibrating motor drive mechanism

Abstract

The present invention relates to the field of motor technology, and specifically to 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 arranged on the guide rail; the first connecting seat is provided with a telescopic 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 arranged in the stator assembly; a Hall sensor is provided between the outer frame and the second connecting seat; an induction magnetic ring cooperating with the Hall sensor is provided after one end of the driving shaft protrudes out of the second connecting seat. The present invention can drive the outer frame to move along the guide rail by setting a telescopic driving assembly, and the guide rail drives the driving shaft to move synchronously, so that the driving shaft can telescope on the rotating motor, so that the whole has the function of reciprocating telescopic movement, thereby improving efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a reciprocating, telescopic and vibrating motor drive mechanism. Background Art

[0002] Motors are widely used in various fields. Motors can make objects rotate, move in a straight line, or make objects vibrate eccentrically with an eccentric structure.

[0003] For electric toothbrushes, motors are required for vibration and rotation. In order to improve the brushing effect of electric toothbrushes, electric toothbrushes that can both vibrate and retract are now available on the market. However, such electric toothbrushes usually use coils and magnetic steel structures inside the motor to drive the rotor to retract. However, this method cannot provide sufficient retraction for the rotation, thereby affecting the brushing effect of the electric toothbrush. Summary of the invention

[0004] The purpose of the present invention is to provide a reciprocating telescopic and vibrating motor drive mechanism in view of the above-mentioned deficiencies in the prior art.

[0005] The object of the present invention is achieved through the following technical solutions: A reciprocating telescopic and vibrating motor drive mechanism comprises an outer frame, a first connecting seat and a second connecting seat; a guide rail is arranged between the first connecting seat and the second connecting seat; the outer frame is slidably arranged on the guide rail;

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

[0007] The rotary motor comprises a stator assembly and a drive shaft rotatably arranged in the stator assembly; the drive shaft is telescopically arranged in the stator assembly; one end of the drive shaft protrudes out of the second connection seat and is rotatably connected to the outer frame;

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

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

[0010] An end of the outer frame close to the first connecting seat is provided with a receiving groove; the screw rod is telescopically arranged in the receiving groove; and the swing block is rotatably arranged on the inner wall of the receiving groove.

[0011] The present invention is further configured such that a clamping piece is provided on the inner wall of the outer frame; the clamping piece is detachably connected to the outer frame; and the swing block is rotatably arranged on the clamping piece.

[0012] The present invention is further configured such that a rotation groove is provided at one end of the outer frame close to the first connection seat; one end of the drive shaft protrudes out of the second connection seat and is rotatably arranged in the rotation groove; a thrust bearing is provided between one end of the drive shaft and the rotation groove;

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

[0014] The present invention is further configured that the rotating electrical machine further comprises a housing; the housing is arranged on the second connecting seat;

[0015] The stator assembly comprises a stator core arranged in a housing and a coil wound around the stator core; the drive shaft is arranged in the stator core.

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

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

[0019] The present invention is further configured that a circuit board is provided at one end of the outer frame close to the second connecting seat; one end of the driving shaft is passed through the circuit board; and the Hall sensor is provided on the circuit board;

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

[0021] The present invention is further configured that a circuit board is provided at one end of the rotating motor close to the outer frame; the Hall sensor is provided on the circuit board; one end of the driving shaft is passed through the circuit board; the driving shaft is provided with a bracket; the induction magnetic ring is movably provided on the bracket;

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

[0023] Beneficial effects of the present invention:

[0024] 1. The present invention can drive the outer frame to move along the guide rail by setting a telescopic drive assembly, and the guide rail drives the drive shaft to move synchronously, so that the drive shaft can perform telescopic activities on the rotating motor, so that the whole has a reciprocating telescopic function, thereby improving efficiency.

[0025] Second, with the cooperation between the stator assembly and the drive shaft, the drive shaft can rotate in the housing of the rotating motor. At the same time, since the drive shaft is telescopically arranged in the stator assembly, the drive shaft vibrates when rotating, thereby having a vibration function.

[0026] Third, by controlling the drive shaft to perform telescopic activities in the housing of the rotating motor, energy loss can be effectively reduced and noise can be effectively reduced.

[0027] Fourth, the present invention can arrange the Hall sensor and the induction magnetic ring outside the rotating motor, which is convenient for cleaning, maintenance and replacement of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

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

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

[0031] Figure 3 yes Figure 2 A partial enlarged view of the A part;

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

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

[0034] Figure 6 yes Figure 5 A partial enlarged view of the B area;

[0035] Among them: 1. outer frame; 11. accommodating groove; 12. snap-on piece; 13. rotating groove; 14. thrust bearing; 21. first connecting seat; 22. second connecting seat; 23. guide rail; 3. driving 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. DETAILED DESCRIPTION

[0036] The present invention is further described in conjunction with the following examples.

[0037] Embodiment 1, by Figures 1 to 4 It can be seen that the reciprocating telescopic and vibrating motor drive mechanism described in this embodiment 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 arranged on the guide rail 23;

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

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

[0040] One end of the driving shaft 3 protrudes out of the second connecting seat 22 and is provided with an induction magnetic ring 44 ; a Hall sensor 42 cooperating with the induction magnetic ring 44 is provided between the outer frame 1 and the second connecting seat 22 .

[0041] Specifically, the reciprocating, telescopic and vibrating motor drive mechanism described in this embodiment, when in use, the telescopic drive assembly can drive the outer frame 1 to move along the guide rail 23, and the guide rail 23 drives the drive shaft 3 to move synchronously, so that the drive shaft 3 can be telescopic on the rotating motor, and the other end of the drive shaft 3 protrudes out of the housing 6 of the rotating motor and can be connected to the toothbrush head, so that the electric toothbrush can have the function of reciprocating telescopic, thereby improving the efficiency of the electric toothbrush; in addition, with the cooperation of the stator assembly and the drive shaft 3, the drive shaft 3 can rotate in the housing 6 of the rotating motor. At the same time, since the telescopic activity of the drive shaft 3 is arranged in the stator assembly, the drive shaft 3 vibrates when it rotates, so that the electric toothbrush can have the function of vibration; in addition, the telescopic drive assembly and the rotating motor can also work independently, so that the drive shaft 3 can be telescoped or rotated.

[0042] Secondly, this embodiment can effectively reduce energy loss and noise by controlling the drive shaft 3 to perform telescopic movement in the housing 6 of the rotating motor instead of driving the entire rotating motor to reciprocate.

[0043] Finally, based on the above foundation, the Hall sensor 42 can be arranged between the outer frame 1 and the second connecting seat 22, and the induction magnetic ring 44 can be arranged at the position where the drive shaft 3 protrudes from the second connecting seat 22, and the vibration amplitude of the drive shaft 3 can be controlled with the cooperation of the Hall sensor 42 and the induction magnetic ring 44; in the traditional rotating motor, its Hall sensor 42 and the induction magnetic ring 44 are built inside the rotating motor, which has the problem of being difficult to clean, repair and replace, while in this embodiment, the Hall sensor 42 and the induction magnetic ring 44 can be arranged outside the rotating motor, which is convenient for cleaning, repair and replacement of parts.

[0044] The present embodiment describes a reciprocating telescopic and vibrating motor drive mechanism, wherein the telescopic drive assembly comprises a DC motor 51, a screw 52 and a swing block 53; the DC motor 51 is disposed 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 disposed in the reciprocating spiral groove 54; wherein the DC motor 51 may be a brushed motor;

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

[0046] Specifically, through the above arrangement, when the drive shaft 3 needs to be extended and retracted, the DC motor 51 is started, and the DC motor 51 drives the screw 52 to rotate. Since the outer wall of the screw 52 is provided with a reciprocating spiral groove 54, the outer frame 1 is provided with a swing block 53, and the swing block 53 moves in the reciprocating spiral groove 54, when the screw 52 rotates, the circular motion can be converted into the axial up and down telescopic motion of the outer frame 1, thereby driving the drive shaft 3 to perform up and down telescopic motion; in addition, in order to make the overall structure more stable, a reducer can be provided between the DC motor 51 and the screw 52, ​​and the DC motor 51 drives the screw 52 to rotate after passing through the reducer. In this embodiment, by providing the DC motor 51 and the screw 52, ​​the outer frame 1 can drive the Hall sensor 42 and the drive shaft 3 to perform linear motion, so that the reciprocating telescopic and vibrating motor drive mechanism has sufficient telescopic amount.

[0047] In the reciprocating telescopic and vibrating motor drive mechanism described in this embodiment, the inner wall of the outer frame 1 is provided with a clamping piece 12; the clamping piece 12 is detachably connected to the outer frame 1; and the swing block 53 is rotatably arranged on the clamping piece 12. The above arrangement facilitates the maintenance and replacement of the swing block 53.

[0048] In the reciprocating telescopic and vibrating motor drive mechanism described in this embodiment, a rotation groove 13 is provided at one end of the outer frame 1 close to the first connecting seat 21; one end of the driving shaft 3 protrudes out of the second connecting seat 22 and is rotatably arranged in the rotation groove 13; a thrust bearing 14 is provided between one end of the driving shaft 3 and the rotation groove 13;

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

[0050] Specifically, in this embodiment, thrust bearings 14 are provided, and 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, the radial sweep vibration and axial displacement of the drive shaft 3 can be separated without interfering with each other; and the overall structure is made more stable and reliable.

[0051] In the reciprocating, telescopic and vibrating motor drive mechanism described in this embodiment, the rotating motor further comprises a housing 6; the housing 6 is arranged on the second connecting seat 22; the stator assembly comprises a stator core 61 arranged in the housing 6 and a coil wound around the stator core 61; the driving shaft 3 is arranged in the stator core 61. In the reciprocating, telescopic and vibrating motor drive mechanism described in this embodiment, the driving shaft 3 is provided with a rotor core 71 on its outer sleeve; a plurality of magnets 72 are arranged on the outer wall of the rotor core 71; the driving shaft 3, the rotor core 71 and the magnets 72 are all rotatably arranged in the stator core 61; the driving shaft 3, the rotor core 71 and the magnets 72 are all telescopically arranged in the stator core 61; the coils are not drawn in the figure.

[0052] Specifically, the stator core 61, the rotor core 71, the magnetic steel 72, the housing 6, the outer frame 1, the screw 52 and the DC motor 51 are all arranged with the drive shaft 3 as the axis, so that the overall structure is stable and reliable.

[0053] When the drive shaft 3 needs to vibrate or rotate, the coil is energized to generate a magnetic field, which cooperates with the magnetic field of the magnet 72 to enable the drive shaft 3 to rotate or vibrate.

[0054] In the reciprocating telescopic and vibrating motor drive mechanism described in this embodiment, the stator core 61 is provided with an insulating frame 62; the insulating frame 62 is arranged between the stator core 61 and the rotor core 71. Specifically, the above arrangement can ensure the insulation performance between the stator core 61 and the rotor core 71.

[0055] In the reciprocating telescopic and vibrating motor drive mechanism described in this embodiment, a first bearing 81 is provided between the drive shaft 3 and one end of the housing 6; a second bearing 82 is provided between the drive shaft 3 and the other end of 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 can also stably telescope between the first bearing 81 and the second bearing 82.

[0056] In the reciprocating telescopic and vibrating motor drive mechanism described in this embodiment, a circuit board 41 is provided at one end of the outer frame 1 close to the second connecting seat 22; one end of the driving shaft 3 is penetrated through the circuit board 41; the Hall sensor 42 is provided on the circuit board 41; the driving shaft 3 is provided with a bracket 43; the induction magnetic ring 44 is provided on the bracket 43; wherein the bracket 43 is fixed on the driving shaft 3, so that the induction magnetic ring 44 and the bracket 43 can move with the driving shaft 3; and the Hall sensor 42, the circuit board 41, the driving shaft 3, the bracket 43 and the induction magnetic ring 44 move synchronously, so as to ensure that the distance between the induction magnetic ring 44 and the Hall sensor 42 remains unchanged, and the accuracy of the induction is ensured. Specifically, through the above-mentioned arrangement, this embodiment enables the Hall sensor 42 and the induction magnetic ring 44 to be arranged outside the rotating motor, which is convenient for cleaning, maintenance and replacement of parts.

[0057] Embodiment 2, as Figure 5 and Figure 6 As shown, in the embodiment of the present invention, a reciprocating telescopic and vibrating motor drive mechanism is provided with a circuit board 41 at one end of the rotating motor close to the outer frame 1; the Hall sensor 42 is provided on the circuit board 41; one end of the driving shaft 3 is passed through the circuit board 41; the driving shaft 3 is provided with a bracket 43; the induction magnetic ring 44 is movably provided on the bracket 43;

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

[0059] Specifically, different from Example 1, this embodiment is achieved by setting the circuit board 41 on the housing 6 of the rotating motor; since the Hall sensor 42 is a precision device, in Example 1, the Hall sensor 42 will continuously reciprocate with the circuit and the outer frame 1, which may easily cause damage to the Hall sensor 42.

[0060] In this embodiment, the circuit board 41 and the Hall sensor 42 are fixed to the bottom of the housing 6 of the rotating motor, so that the Hall sensor 42 no longer moves, thereby effectively protecting the Hall sensor 42; and in the process of extension and retraction of the drive shaft 3, since the relative distance between the Hall sensor 42 and the magnetic ring changes, in this embodiment, a piezoelectric ceramic sheet 9 is arranged between the inductive magnetic ring 44 and the bracket 43, so that the piezoelectric ceramic sheet 9 can change its own thickness 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 inductive 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 solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A reciprocating telescopic and vibrating motor drive mechanism, characterized in that: It comprises 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 arranged on the guide rail (23); The first connecting seat (21) is provided with a telescopic driving assembly for driving the outer frame (1) to slide; the second connecting seat (22) is provided with a rotating motor; The rotary motor comprises a stator assembly and a drive shaft (3) rotatably arranged on the stator assembly; the drive shaft (3) is telescopically arranged inside the stator assembly; one end of the drive shaft (3) protrudes out of the second connection seat (22) and is rotatably connected to the outer frame (1); An induction magnetic ring (44) is provided after one end of the drive shaft (3) protrudes out of the second connection seat (22); a Hall sensor (42) cooperating with the induction magnetic ring (44) is provided between the outer frame (1) and the second connection seat (22); A rotation groove (13) is provided at one end of the outer frame (1) close to the first connection seat (21); one end of the drive shaft (3) protrudes out of the second connection seat (22) and is rotatably arranged in the rotation groove (13); a thrust bearing (14) is provided between one end of the drive shaft (3) and the rotation groove (13); A bolt (31) is provided between one end of the drive shaft (3) and the thrust bearing (14); The rotating electrical machine further comprises a housing (6); the housing (6) is arranged on the second connecting seat (22); The stator assembly comprises a stator core (61) disposed in a housing (6) and a coil wound around the stator core (61); the drive shaft (3) is disposed in the stator core (61); The telescopic drive assembly comprises a DC motor (51), a screw rod (52) and a swing block (53); the DC motor (51) is arranged on a first connecting seat (21); the screw rod (52) is connected to an output end of the DC motor (51); a reciprocating spiral groove (54) is arranged on an outer wall of the screw rod (52); and the swing block (53) is movably arranged in the reciprocating spiral groove (54); An end of the outer frame (1) close to the first connecting seat (21) is provided with a receiving groove (11); the screw rod (52) is telescopically movably arranged in the receiving groove (11); and the swing block (53) is rotatably arranged on the inner wall of the receiving groove (11); The drive shaft (3) is provided with a rotor core (71) on its outer shell; a plurality of magnets (72) are provided on the outer wall of the rotor core (71); the drive shaft (3), the rotor core (71) and the magnets (72) are all rotatably disposed in the stator core (61); the drive shaft (3), the rotor core (71) and the magnets (72) are all telescopically disposed in the stator core (61).

2. A reciprocating telescopic and vibrating motor drive mechanism according to claim 1, characterized in that: The inner wall of the outer frame (1) is provided with a clamping piece (12); the clamping piece (12) is detachably connected to the outer frame (1); and the swing block (53) is rotatably arranged on the clamping piece (12).

3. A reciprocating telescopic and vibrating motor drive mechanism according to claim 1, characterized in that: The stator iron core (61) is provided with an insulating frame (62); the insulating frame (62) is arranged between the stator iron core (61) and the rotor iron core (71).

4. The reciprocating telescopic and vibrating motor drive mechanism according to claim 1, characterized in that: A first bearing (81) is provided between the drive shaft (3) and one end of the housing (6); and a second bearing (82) is provided between the drive shaft (3) and the other end of the housing (6).

5. The reciprocating telescopic and vibrating motor drive mechanism according to claim 1, characterized in that: A circuit board (41) is provided at one end of the outer frame (1) close to the second connection seat (22); one end of the drive shaft (3) is passed through the circuit board (41); and the Hall sensor (42) is provided on the circuit board (41); The driving shaft (3) is provided with a bracket (43); the induction magnetic ring (44) is arranged on the bracket (43).

6. The reciprocating telescopic and vibrating motor drive mechanism according to claim 1, characterized in that: A circuit board (41) is provided at one end of the rotating motor close to the outer frame (1); the Hall sensor (42) is provided on the circuit board (41); one end of the driving shaft (3) is passed through the circuit board (41); the driving shaft (3) is provided with a bracket (43); the induction magnetic ring (44) is movably provided 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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