CN208640941U - Electric toothbrush main body driving structure - Google Patents

Abstract

A kind of electric toothbrush main body driving structure, its reciprocal torsion output for being able to achieve electric toothbrush, the electric toothbrush main body driving structure can be made of direct current generator, cam drive unit, swing rod unit and output shaft, the internal gear set in pinion gear and cam drive unit in direct current generator output shaft is covered to be engaged, the cam of cam drive unit and U-shaped swing rod unit matching, the output end of swing rod unit imparts power to head toothbrushes by output shaft, and the movement parts and motor in the utility model can be fixed on bracket；By the driving structure of the utility model, it is able to achieve and reverses the periodic reverse that motor continuous rotary motion transform is toothbrush main shaft, while the component of movement mechanism is less, intensity is higher, technique requires low, smooth running, low noise, kinetic equation loss is few, and the service life is long, there is good marketing benefit.

Description

Electric toothbrush main body driving structure

Technical field

The utility model relates to the technical field of electric toothbrush more particularly to it is a kind of can be by motor continuous rotary motion transform The electric toothbrush main body driving structure reversed for the periodic reverse of toothbrush main shaft.

Background technique

With the improvement of people ' s living standards and to the attention degree of itself oral health, electric toothbrush more and more enters Into average family, the relatively common traditional toothbrush of electric toothbrush has the high clear superiority of cleaning efficiency.But currently on the market It is divided into the reciprocating manner of brushhead vibration formula and certain amplitude in popular electric toothbrush technology.The utility model belongs to bristle The mode power drive structure of reciprocating motion.Existing similar product, although much design performance is excellent, mostly technique It is required that high, structure is complicated, in order to meet final performance performance, uses a large amount of metal component, the ultimate cost of product mostly Height, it is unfavorable to product promotion.Although some constructions are simple, bearing capacity is poor, is prone to wear, and noise is also big, can not meet use Requirement of the family to properties of product.

For this purpose, the designer of the utility model passes through this Shen of creative labor utility model thoughts on drawbacks described above Please in electric toothbrush main body driving structure, realize that part is few, intensity is high, and technique requires low, smooth running, low noise, power Loss is few, and the beneficial effect of service life length has good marketing benefit ratio.

Utility model content

It is simple and compact for structure the purpose of this utility model is to provide a kind of electric toothbrush main body driving structure, operation More convenient hommization, and more intensity is high, technique requirement is low, and smooth running, low noise, kinetic equation loss is few, and the service life is long, has good Good marketing benefit ratio.

To reach above-mentioned purpose, the utility model discloses a kind of electric toothbrush main body driving structures, comprising successively connecting Direct current generator, cam drive unit, swing rod unit and the output shaft connect, it is characterised in that:

The direct current generator is connected to cam drive unit to drive cam drive unit to carry out rotary motion, the cam Gear unit is with the progress power conversion of swing rod unit matching and defeated by output shaft progress power by the cam of its front end bias Out；

Pinion gear is arranged on the motor shaft of the direct current generator, the rear end of the cam drive unit is equipped with for described small The circular recess that gear protrudes into, the circular recess is interior to be equipped with the internal gear for being engaged in the pinion gear thus the biography for realizing power It passs；

The rear end sides of the swing rod unit are equipped with the swing arm to extend back, are formed and cam drive unit between two swing arms The U-shaped notch of cam engagement put to the cam driven eccentric when cam drive unit turn round under the driving of linear motor Moving cell carries out opposite swing.

Wherein, the pinion gear is 1:2 so that reduction ratio is 2:1 after engaging with the gear ratio of internal gear.

Wherein, the downside of the swing unit front end is equipped with output end, and the output end is equipped with the axis fixed for output shaft Hole.

Wherein, the rear end sides of output shaft are equipped with notch, and the two sides of the axis hole are correspondingly provided with planar portions with by output shaft It is fixed in axis hole.

Wherein, the front end center of the cam drive unit is additionally provided with the axis extended forward, and the swing rod unit is equipped with For the perforative arc-shaped through-hole of axis.

Wherein, the cam drive unit, swing rod unit and output shaft are fixed in bracket.

Wherein, the pinion gear is made of POM or nylon plastic(s) or brass, the material of the swing rod unit be POM or Nylon plastic(s), output shaft are made of stainless steel.

Wherein, the eccentricity of the cam is 1.5~1.9 millimeters.

Wherein, the cam is cylindrical type, and the material of cam is POM or nylon plastic(s).

Wherein, the windup-degree of the swing rod unit is between+17 degree and -17 degree.

By above structure, the utility model is able to achieve following technical effect:

1, simple and compact for structure, operate more convenient hommization, later period replacement and easy to maintain；

2, entire dynamical system finally adds up still keep stable state in 200 hours under practical nominal load, and having can Operability, performance, craftsmanship, economic sex expression are superior.

3, intensity is high, and technique requirement is low, and smooth running, low noise, kinetic equation loss is few, and the service life is long, has good market to push away Wide benefit ratio.

For the above and other objects, features and advantages of the utility model can be clearer and more comprehensible, preferable reality is cited below particularly Example is applied, and cooperates institute's accompanying drawings, is described in detail below.

Detailed description of the invention

Fig. 1: for the decomposition texture schematic diagram of the electric toothbrush main body driving structure of the utility model.

Fig. 2A: for the combination schematic diagram of the electric toothbrush main body driving structure of the utility model.

Fig. 2 B: for the schematic diagram of another direction of the electric toothbrush main body driving structure of the utility model.

Fig. 2 C: for A-A in Fig. 2A to cross-sectional view.

Fig. 2 D: for the cross-sectional view of B-B direction in Fig. 2A.

Fig. 2 E: for C-C in Fig. 2A to cross-sectional view.

Fig. 3 A and Fig. 3 B: schematic diagram when for the utility model motion state lower gear output angle being 0 degree.

Fig. 3 C and Fig. 3 D: schematic diagram when for the utility model motion state lower gear output angle being 90 degree.

Fig. 3 E and Fig. 3 F: schematic diagram when for the utility model motion state lower gear output angle being 180 degree.

Fig. 3 G and Fig. 3 H: schematic diagram when for the utility model motion state lower gear output angle being 270 degree.

Fig. 4: the structural schematic diagram of electric toothbrush is applied to for the utility model.

Fig. 5: the schematic diagram of another direction of electric toothbrush is applied to for the utility model.

Fig. 6: the schematic diagram of another direction of electric toothbrush is applied to for the utility model.

Appended drawing reference:

10, direct current generator；12, pinion gear；20, cam drive unit；22, internal gear；24, cam；26, axis；30, it puts Bar unit；32, swing arm portion；34, output end；36, arc-shaped through-hole；40, output shaft；42, axle sleeve；50, bracket；100, brush head group Part；102, battery；104, battery bracket.

Specific embodiment

Fig. 1 and Fig. 2A-E is please referred to, the decomposition for respectively illustrating the electric toothbrush main body driving structure of the utility model is shown Intention and combination diagram.As shown, the electric toothbrush main body driving structure of the utility model may include sequentially connected straight The continuous rotary movement of galvanic electricity machine 10, cam drive unit 20, swing rod unit 30 and output shaft 40, the direct current generator 10 passes through The power transmitting and converting of cam drive unit 20 and swing rod unit 30 is that the reciprocating rotating of output shaft moves.

Wherein, the direct current generator 10 is connected to cam drive unit 20 to drive cam drive unit 20 to carry out revolution fortune Dynamic, the cam drive unit 20 carries out power conversion by cam 24 and swing rod unit 30 cooperation of its front end bias, and leads to Cross the progress power output of output shaft 40 for being fixed on 30 front end of swing rod unit.

In the illustrated embodiment, pinion gear 12, the cam drive are arranged on the motor shaft of the direct current generator 10 The rear end of unit 10 is equipped with the circular recess protruded into for the pinion gear 12, is equipped in the circular recess and is engaged in the small tooth The internal gear 22 of wheel 12, to realize the transmitting of power.

Optionally, the diameter of the internal gear 22 and the number of teeth are greater than pinion gear 12, to pass through internal gear and pinion gear Engagement also achieve deceleration and the increase of driving moment simultaneously, it is preferred that the number of teeth of the pinion gear 12 and internal gear 22 Than for 1:2, so that reduction ratio is 2:1 after engagement, in more preferably embodiment, pinion gear is 13 teeth, and internal gear is 26 teeth.

Wherein, the rear end sides of the swing rod unit 30 are equipped with the swing arm 32 that extends back, formed between two swing arms 32 with The U-shaped notch that the cam 24 of cam drive unit 20 cooperates, as a result, when under driving of the cam drive unit 20 in linear motor 10 When revolution, eccentric cam 24 is moved along cam envelope curve, and since the motion profile of eccentric cam 24 is greater than U-shaped notch Space, so that cam drives swing unit to carry out opposite swing during exercise.

Wherein, the downside of 30 front end of swing unit is equipped with output end 34, and the output end is equipped with solid for output shaft 40 Fixed axis hole, and the rear end sides of output shaft 40 are equipped with notch, the two sides of the axis hole are correspondingly provided with planar portions, by output shaft 40 are fixed in axis hole.

The front end center of the cam drive unit 20 is additionally provided with the axis 26 extended forward, and the swing rod unit 30 is defeated The top of outlet 34 is equipped with for the perforative arc-shaped through-hole 36 of axis, and the camber line of the arc-shaped through-hole 36 is with the axis on the output end Axially bored line is center of circle setting, and the preferred arc-shaped through-hole 36 between two swing arms 32 and is symmetrical arranged, in this way Setting, swing unit passes through axis 26 during the swing and the cooperation of arc-shaped through-hole 36 is more reliable and stable, and swings rail Mark is more accurate, the final precise motion for realizing output shaft.

Wherein, the cam drive unit 20, swing rod unit 30 and output shaft 40 are fixed in bracket 50,0 output The rear end of axis 40 is equipped with axle sleeve 42 to stretch out from the front end of bracket 50.

The movement mechanism of the utility model is as follows: linear motor drive motor shaft pinion gear continuous rotary, pinion gear with It is provided with the internal gear engagement of cam drive unit, i.e. pinion gear revolution also drives the internal gear to turn round, because of two gear diameters It is variant, it also completes and a certain range of constant no-load voltage ratio of motor speed is slowed down so that driving torque is promoted, after swing rod unit The U-shaped notch at end is engaged on cam, and when cam is turned round with internal gear, U-shaped notch is forced to move along cam envelope curve, Swing rod unit is driven to carry out the revolution of after-combustion axis, output shaft is fastened on swing rod unit, defeated when swing rod unit generation reciprocating rotating Shaft finally shows also as reciprocating rotating.

Referring to Fig. 3 A-3H it is found that axis is arranged through arc-shaped through-hole, in internal gear 0 degree shown in Fig. 3 A and Fig. 3 B Setting in motion, cam is located at the leftmost side at this time, and swing rod unit is also rocked to the leftmost side, when internal gear moves to Fig. 3 C and Fig. 3 D institute At show 90 degree, cam is located at top side at this time, and swing rod unit is rocked to middle position therewith, when internal gear moves to Fig. 3 E When with 180 degree shown in Fig. 3 F, cam is located at the rightmost side at this time, and swing rod unit is rocked to right-most position therewith, works as internal tooth When wheel moves to shown in Fig. 3 G and Fig. 3 H 270 degree, cam is located at lower side at this time, and swing rod unit is rocked to interposition therewith Set, and due to being fixed with not swingable output shaft on the downside of swing rod unit front end, so realize upper end swing and lower end it is past Return turns.

Wherein, the angle of final output axis revolution is related to the width of U-shaped notch of the eccentricity of cam and rocking bar unit. The eccentricity of cam and the pivot angle of output shaft are directly proportional.The width of the U-shaped notch of rocking bar unit is with output around axis pivot angle at anti- Than.The width setting of the U-shaped notch of the eccentricity and rocking bar unit of cam also influences mill in addition to directly affecting around axis output angle The loss susceptibility around shaft angle degree after damage.And influence to export the torque harmony in different swash angle positions around axis, reasonably set Set the torque stabilization that may be implemented in different pivot angle output positions.Reasonable setting can effectively avoid in the expected setting of product Under service life, the abrasion at bond locations is reduced to zone of reasonableness around the reciprocal pivot angle influence of axis under the conditions of determining load.

Optionally, the U-shaped notch of the rocking bar unit and output shaft are in the same direction.

Optionally, the rocking bar unit and output shaft are integrally formed, no relative motion relation.

Optionally, the axial direction of the cam of the cam drive unit and final torque output shaft are axially in the same direction.

Optionally, the motor shaft of the linear motor and output shaft are in the same direction.

Optionally, in specific embodiment of the utility model, linear motor selects the straight of 20 millimeter of three magnetic pole of diameter Galvanic electricity machine, initial speed are about 9000 revs/min, are about 40gf.cm in the output torque of best efficiency point, best efficiency point turns Speed is designed as 6000 turns.It is desirable that controlling motor load after driving brush after the movement conversion mechanism of cooperation the utility model Revolving speed falls in 6000 revs/min of maximal efficiency operating point, can do the work efficiency that limits play motor in this way.

Optionally, POM or nylon plastic(s) can be used in the pinion gear or brass is made, specific selection and product Quality grade determines.

Preferably, the eccentricity of the cam is 1.5-1.9 millimeters.

Optionally, the cam is round, and the material of cam is POM or nylon plastic(s).

Optionally, the material of the swing rod unit is POM or nylon plastic(s), the output shaft with its close-fitting, it is contemplated that anti- Performance of becoming rusty is made of stainless steel.

Optionally, the windup-degree of the swing rod unit is best between+17 degree and -17 degree.

See Fig. 4-Fig. 6, the utility model is packed into electric toothbrush, which includes to be exported shaft-driven brush head group Part 100, the rear end of electric toothbrush is equipped with the battery bracket 104 of the battery 102 for providing motor power and fixed battery, entire dynamic Force system finally adds up still keep stable state in 200 hours under practical nominal load.After 200 hours, bearing torque and pendulum Frequently, noise variation rate is less than 30%.Real application data shows that the movement conversion mechanism of the proposition of the utility model is that have can Operability, performance, craftsmanship, economic sex expression are superior.

Only embodiments described above is implemented when that cannot limit the utility model with this for preferable embodiment Range, if it is practical should all to belong to this according to equivalent change or modification made by present utility model application the scope of the patents and description Novel following patent covering scope.

Claims (10)

1. a kind of electric toothbrush main body driving structure, comprising sequentially connected direct current generator, cam drive unit, swing rod unit and Output shaft, it is characterised in that:

The direct current generator is connected to cam drive unit to drive cam drive unit to carry out rotary motion, the cam drive Unit carries out power conversion by the cam and swing rod unit matching of its front end bias and carries out power output by output shaft；

Pinion gear is arranged on the motor shaft of the direct current generator, the rear end of the cam drive unit, which is equipped with, supplies the pinion gear The circular recess protruded into, the circular recess is interior to be equipped with the internal gear for being engaged in the pinion gear thus the transmitting for realizing power；

The rear end sides of the swing rod unit are equipped with the swing arm to extend back, are formed between two swing arms convex with cam drive unit It is single to which the cam driven eccentric when cam drive unit turns round under the driving of linear motor is swung to take turns the U-shaped notch of cooperation Member carries out opposite swing.

2. electric toothbrush main body driving structure as described in claim 1, which is characterized in that the tooth of the pinion gear and internal gear Number is than being 1:2 so that reduction ratio is 2:1 after engagement.

3. electric toothbrush main body driving structure as described in claim 1, which is characterized in that the downside of the swing unit front end Equipped with output end, the output end is equipped with the axis hole fixed for output shaft.

4. electric toothbrush main body driving structure as claimed in claim 3, which is characterized in that the rear end sides of output shaft are equipped with and cut Mouthful, the two sides of the axis hole are correspondingly provided with planar portions so that output shaft to be fixed in axis hole.

5. electric toothbrush main body driving structure as described in claim 1, which is characterized in that the front end of the cam drive unit Center is additionally provided with the axis extended forward, and the swing rod unit is equipped with for the perforative arc-shaped through-hole of axis.

6. electric toothbrush main body driving structure as described in claim 1, which is characterized in that the cam drive unit, swing rod Unit and output shaft are fixed in bracket.

7. electric toothbrush main body driving structure as described in claim 1, which is characterized in that the pinion gear uses POM or Buddhist nun Imperial plastics or brass are made, and the material of the swing rod unit is POM or nylon plastic(s), and output shaft is made of stainless steel.

8. electric toothbrush main body driving structure as described in claim 1, which is characterized in that the eccentricity of the cam is 1.5 ~1.9 millimeters.

9. electric toothbrush main body driving structure as described in claim 1, which is characterized in that the cam is cylindrical type, cam Material be POM or nylon plastic(s).

10. electric toothbrush main body driving structure as described in claim 1, which is characterized in that the torsion angle of the swing rod unit Degree is between+17 degree and -17 degree.