CN214424895U - Special shaft for motor and reciprocating rotating motor - Google Patents

Abstract

The utility model discloses a special axle of motor and reciprocating rotation motor, wherein the special axle of motor is including the first axis body, elasticity connecting rod and the second axis body that are rectangular shape, and the three sets up along same rectilinear direction to connect the formation motor shaft in proper order, wherein the rigidity of elasticity connecting rod is less than the rigidity of first axis body and second axis body, in order when allowing the motor shaft to receive bending force or torsional force, elasticity connecting rod is in take place elasticity bending or elasticity torsional deformation before first axis body and the second axis body warp. The reciprocating rotary motor is equipped with the above-mentioned motor-dedicated shaft. The utility model has the advantages that: the elastic connecting shaft strip has rigidity and elasticity, so that the motor shaft can transmit telescopic force and torsion and has certain elastic deformability, and when the motor shaft is used for the electric toothbrush, the energy can be stored and output by the elastic connecting shaft strip, so that the energy output of the motor is smoother, and the tooth brushing comfort of a user is improved.

Description

Special shaft for motor and reciprocating rotating motor

Technical Field

The utility model belongs to the technical field of motor structure, concretely relates to special axle of motor and reciprocating rotation motor.

Background

The motor shaft is typically a rigid rod for outputting a stretching force or a torque force. However, in some special cases, the mechanical properties of the motor shaft need to be adjusted. For example, an electric toothbrush is a device that utilizes a high-speed vibrating movement to rotate or vibrate a brush head to achieve tooth cleaning. In recent years, with the continuous improvement of the living standard of people, the domestic market of the electric toothbrush is gradually expanded, the number of used people is increased, and the personalized requirements on the electric toothbrush product are increased due to the increase of the number of the used people. At present, an output shaft of a driving motor applied to an electric toothbrush is directly connected to a brush head of the electric toothbrush, and the rigidity of the shaft is high, so that the brush head and the output shaft swing completely and basically, when the force of people for brushing teeth and pressing is too high, the brush head has high pressure or friction force on teeth and gums, and the comfort of a user is reduced. Although the improvement of the mechanical property of the brush head can improve discomfort caused by tooth brushing pressure, for different users, due to different use habits, different hand-held pressing force and different self oral cavity sensitivities, the improvement of the performances of the motor and the output shaft also becomes an important aspect for improving the use comfort and functionality of the electric toothbrush.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a special axle of motor and reciprocating rotation motor.

The technical scheme is as follows:

a special shaft for a motor is characterized by comprising a first shaft body, an elastic shaft connecting strip and a second shaft body which are in a long strip shape, wherein the first shaft body, the elastic shaft connecting strip and the second shaft body are arranged along the same linear direction and are sequentially connected to form a motor shaft;

the rigidity of the elastic shaft connecting strip is smaller than that of the first shaft body and the second shaft body, so that when the motor shaft is subjected to bending force or torsion force, the elastic shaft connecting strip is subjected to elastic bending or elastic torsion deformation before the first shaft body and the second shaft body deform.

When the motor shaft is used for the electric toothbrush, the motor energy output is smoother due to the fact that the elastic connecting shaft strip can store and output energy, and therefore tooth brushing comfort of a user is improved.

As a preferable technical scheme, the first shaft body and the second shaft body are both in a round rod shape;

the elastic connecting shaft strip is either flaky, spiral or cylindrical;

and two ends of the elastic shaft connecting strip are respectively connected with the corresponding end parts of the first shaft body and the second shaft body.

By adopting the design, the rigidity of the elastic connecting shaft strip is lower relative to the first shaft body and the second shaft body, and the elastic connecting shaft strip is easier to deform.

According to a preferable technical scheme, the section of the elastic connecting shaft strip is rectangular, and the length-width ratio of the section is 3-8: 1.

By adopting the design, the section of the elastic connecting shaft strip is rectangular, so that the rigidity is higher in the long axis direction of the section, and the rigidity is lower in the short axis direction of the section, so that certain rigidity can be kept, the elastic connecting shaft strip is more flexible in the short axis direction of the section, and torsion with a certain angle can be generated around the length direction.

According to the preferable technical scheme, a first clamping groove is formed in the end face of the connecting end of the first shaft body and the elastic shaft connecting strip, and the connecting end of the elastic shaft connecting strip and the first shaft body is inserted into the first clamping groove and is connected in a welding mode.

Design more than adopting, the joint strength of elasticity connecting rod and first axis body is high, does not increase local radial dimension simultaneously, and is convenient for clean.

According to the preferable technical scheme, a second clamping groove is formed in the end face of the connecting end of the second shaft body and the elastic connecting shaft strip, and the connecting end of the elastic connecting shaft strip and the second shaft body is inserted into the second clamping groove and is connected in a welding mode.

By adopting the design, the elastic connecting shaft strip and the second shaft body are high in connecting strength, the local radial size is not increased, and the cleaning is convenient.

As the preferred technical scheme, one end of the second shaft body, which is far away from the elastic shaft connecting strip, is also integrally formed with a toothbrush head fixing rod.

With the above design, the toothbrush head fixing rod is used for installing the toothbrush head.

A second object of the present invention is to provide a reciprocating motor.

A reciprocating rotation motor comprises a motor shaft and is characterized by further comprising a motor body, wherein the first shaft body is formed by an output shaft of the motor body, and one end of the first shaft body extends out of the motor body and then is connected with the elastic connecting shaft strip.

By adopting the design, the reciprocating motor is combined with the elastically deformable motor shaft, and the motor shaft is bent and twisted to a certain degree under a loaded state while outputting rotation, so that the electric toothbrush head does not synchronously and rigidly rotate along with the motor, but is shifted and delayed to a certain extent, the capability output is smoother, and a user feels comfortable and soft when brushing teeth.

As a preferred technical solution, the motor body is further connected with a cylindrical rotating shaft cover, the rotating shaft cover is sleeved on the extending end of the first shaft body, a cylindrical axis of the rotating shaft cover coincides with an axial axis of the first shaft body, one end of the rotating shaft cover is fixedly connected with the housing of the motor body, the other end of the rotating shaft cover radially contracts to form a shrinkage hole portion, a bearing is installed in an inner hole of the shrinkage hole portion, an outer ring of the bearing is embedded on an inner wall of the rotating shaft cover, and an inner ring of the bearing is sleeved on the second shaft body.

By adopting the design, the rotating shaft cover and the bearing play a role in radially limiting the second shaft body, the motor shaft mainly takes elastic torsion deformation as a main part when bearing load, the rotating shaft cover plays a role in protecting the extending end of the first shaft body positioned in the rotating shaft cover and the elastic connecting shaft strip, and the elastic connecting shaft strip is not interfered when deformed and can increase the aesthetic degree.

Compared with the prior art, the beneficial effects of the utility model are that: the elastic connecting shaft strip has rigidity and elasticity, so that the motor shaft can transmit telescopic force and torsion and has certain elastic deformability, the elastic connecting shaft strip is elastically deformed and converts mechanical work or kinetic energy into elastic potential energy, after the load of the motor shaft is removed, the elastic connecting shaft strip is restored, the elastic potential energy is converted into mechanical energy or kinetic energy, and when the motor shaft is used for the electric toothbrush, the energy output of the motor is smoother due to the fact that the elastic connecting shaft strip can store and output energy, and the tooth brushing comfort of a user is improved.

Drawings

FIG. 1 is a schematic view of a first perspective of a motor shaft;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is an exploded view of the motor shaft;

FIG. 4 is a schematic view of the structure of the reciprocating rotary motor;

fig. 5 is an exploded view of the reciprocating rotary motor.

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

The utility model provides a special axle of motor, is including the first axis body 1, the elastic coupling strip 2 and the second axis body 3 that are rectangular shape, and the three sets up along same rectilinear direction to connect in proper order and form the motor shaft. The rigidity of the elastic shaft connecting strip 2 is less than that of the first shaft body 1 and the second shaft body 3, so that when the motor shaft is subjected to bending force or torsion force, the elastic shaft connecting strip 2 is subjected to elastic bending or elastic torsion deformation before the first shaft body 1 and the second shaft body 3 deform.

As shown in fig. 1 and 2, the first shaft body 1 and the second shaft body 3 are each in the shape of a circular rod, and the elastic shaft connecting strip 2 may be in the shape of a sheet, a spiral, or a cylinder. Two ends of the elastic connecting shaft strip 2 are respectively connected with corresponding ends of the first shaft body 1 and the second shaft body 3.

The section of the elastic connecting shaft strip 2 shown in the embodiment is rectangular, and the length-width ratio of the section is 3-8: 1. As shown in fig. 3, a first clamping groove 1a is formed in an end face of a connection end of the first shaft body 1 and the elastic shaft connecting strip 2, and the connection end of the elastic shaft connecting strip 2 and the first shaft body 1 is inserted into the first clamping groove 1a and is welded thereto. The end face of the connecting end of the second shaft body 3 and the elastic connecting shaft strip 2 is provided with a second clamping groove 3a, and the connecting end of the elastic connecting shaft strip 2 and the second shaft body 3 is inserted in the second clamping groove 3a and is connected in a welding mode. The first shaft body 1 and the second shaft body 3 are processed by metal round rods, and the elastic connecting shaft strip 2 is processed by elastic metal sheets.

And a toothbrush head fixing rod 3b is further integrally formed at one end of the second shaft body 3, which is far away from the elastic shaft connecting strip 2.

One typical application of the above-described motor shaft is a reciprocating rotary motor of an electric toothbrush.

Referring to fig. 4 and 5, a reciprocating rotary motor includes a motor body 4, an output shaft of the motor body 4 forms a first shaft body 1, and one end of the first shaft body 1 extends out of the motor body 4 and is connected with an elastic shaft connecting bar 2. The motor capable of reciprocating swing is the prior art, and thus the structure of the motor body 4 is not described in detail.

The motor body 4 is further connected with a cylindrical rotating shaft cover 5, the rotating shaft cover 5 is sleeved on the extending end of the first shaft body 1, the cylindrical axis of the rotating shaft cover 5 coincides with the axial axis of the first shaft body 1, one end of the rotating shaft cover 5 is fixedly connected with the shell of the motor body 4, the other end of the rotating shaft cover 5 contracts radially to form a hole shrinking portion 5a, a bearing 6 is installed in an inner hole of the hole shrinking portion 5a, the outer ring of the bearing 6 is embedded in the inner wall of the rotating shaft cover 5, and the inner ring of the bearing 6 is sleeved on the second shaft body 3.

When in use, the electric toothbrush head is arranged on the toothbrush head fixing rod 3 b. When the user brushed teeth, the reciprocal rotation motor drove the reciprocal rotation of motor shaft, and electronic toothbrush head also rotated thereupon, and when electronic toothbrush head pressed the pressure on tooth or gum reached certain size, elastic coupling strip 2 took place torsional deformation, and the relative motor body 4's of the rotation of electronic toothbrush head this moment output has certain hysteresis, and when the load removed, elastic coupling strip 2's elastic deformation recovered rapidly again. Consequently, for among the prior art electric toothbrush head and motor output shaft keep synchronous rigidity pivoted motion characteristics, have the utility model discloses an electric toothbrush of reciprocal rotation motor, motor shaft energy output is more level and smooth and soft in the use, and the user feels comfortable.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.

Claims (8)

1. The utility model provides a special axle of motor which characterized in that: the motor shaft comprises a first shaft body (1), an elastic shaft connecting strip (2) and a second shaft body (3) which are in a long strip shape, arranged along the same linear direction and sequentially connected in sequence to form a motor shaft;

the rigidity of the elastic shaft connecting strip (2) is smaller than the rigidity of the first shaft body (1) and the second shaft body (3) so as to allow the elastic shaft connecting strip (2) to be subjected to elastic bending or elastic torsional deformation before the first shaft body (1) and the second shaft body (3) deform when the motor shaft is subjected to bending force or torsional force.

2. Shaft for motors, according to claim 1, characterized in that: the first shaft body (1) and the second shaft body (3) are both in a round rod shape;

the elastic connecting shaft strip (2) is either flaky, spiral or cylindrical;

and two ends of the elastic shaft connecting strip (2) are respectively connected with corresponding end parts of the first shaft body (1) and the second shaft body (3).

3. Shaft for motors, according to claim 2, characterized in that: the section of the elastic connecting shaft strip (2) is rectangular, and the length-width ratio of the section is 3-8: 1.

4. Shaft for motors, according to claim 2, characterized in that: first axis body (1) with first draw-in groove (1a) has been seted up to the link terminal surface of elasticity even axle strip (2), elasticity even axle strip (2) with the link of first axis body (1) is inserted and is established in first draw-in groove (1a) to welded connection.

5. Shaft for motors, according to claim 2, characterized in that: the end face of the connecting end of the second shaft body (3) and the elastic connecting shaft strip (2) is provided with a second clamping groove (3a), and the connecting end of the elastic connecting shaft strip (2) and the second shaft body (3) is inserted into the second clamping groove (3a) and is connected in a welding mode.

6. Shaft for motors, according to claim 2, characterized in that: one end of the second shaft body (3) far away from the elastic shaft connecting strip (2) is also integrally formed with a toothbrush head fixing rod (3 b).

7. A reciprocating rotary electric machine comprising a motor shaft according to any one of claims 1 to 6, characterized in that: the motor is characterized by further comprising a motor body (4), wherein an output shaft of the motor body (4) forms the first shaft body (1), and one end of the first shaft body (1) extends out of the motor body (4) and then is connected with the elastic connecting shaft strip (2).

8. The reciprocating rotary motor of claim 7, wherein: motor body (4) still are connected with the pivot cover (5) of tube-shape, this pivot cover (5) overcoat in the end that stretches out of first axis body (1), the bobbin line of this pivot cover (5) with the axial lead coincidence of first axis body (1), the one end of this pivot cover (5) with the casing fixed connection of motor body (4), the other end radial shrinkage of this pivot cover (5) is in order to form shrinkage cavity portion (5a), and bearing (6) are installed to the hole of this shrinkage cavity portion (5a), and the outer lane of this bearing (6) inlays and locates the inner wall of pivot cover (5), and the inner circle cover of this bearing (6) is established on second axis body (3).

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