WO2023245734A1 - 一种具有弹性轴承座的复合运动电机及电动牙刷 - Google Patents

一种具有弹性轴承座的复合运动电机及电动牙刷 Download PDF

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Publication number
WO2023245734A1
WO2023245734A1 PCT/CN2022/104217 CN2022104217W WO2023245734A1 WO 2023245734 A1 WO2023245734 A1 WO 2023245734A1 CN 2022104217 W CN2022104217 W CN 2022104217W WO 2023245734 A1 WO2023245734 A1 WO 2023245734A1
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Prior art keywords
bearing seat
elastic bearing
elastic
motor shaft
motor
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PCT/CN2022/104217
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English (en)
French (fr)
Inventor
邱健达
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深圳市一晤未来科技有限公司
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Publication of WO2023245734A1 publication Critical patent/WO2023245734A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
    • F16C27/06—Elastic or yielding bearings or bearing supports, for exclusively rotary movement by means of parts of rubber or like materials
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2726—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
    • H02K1/2733—Annular magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/34—Reciprocating, oscillating or vibrating parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings

Definitions

  • the present invention claims priority to the Chinese patent application with an application date of June 24, 2022, an application number of CN2022107270379, and a name: a composite motion motor and an electric toothbrush with an elastic bearing seat.
  • the invention belongs to the field of electric motors, and in particular relates to a composite motion motor with an elastic bearing seat.
  • the compound motion is generally realized through two independent motors, that is, one independent motor realizes the up and down movement of the motor shaft, and the other independent motor realizes the forward and backward linear movement of the motor shaft. Movement, such as Panasonic's electric toothbrush products; this type of compound movement is not the same as the compound movement patented in this application.
  • the invention name is "a moving magnet linear rotation two-degree-of-freedom motor”. It is just a theory, simply disclosed by setting up two motors that share a motor shaft, and an electromagnetic drive. One part realizes the left and right rotation of the motor shaft, and the other electromagnetic drive part realizes the forward and backward linear motion of the motor shaft. However, this patent only discloses the design of the electromagnetic drive part and does not mention the design of the structural part at all, so it cannot be truly applied. On the actual product;
  • the object of the present invention is to provide a compound motion motor with an elastic bearing seat to solve the above-mentioned shortcomings of the background art.
  • This application proposal provides a composite motion motor with an elastic bearing seat, including: a motor shaft, a bearing sleeved on the motor shaft, an elastic bearing seat sleeved on the bearing, a rotary drive part and a linear drive part
  • the elastic bearing seat includes a fixed part, a bearing connection part connected to the bearing, and an elastic movable part connecting the fixed part and the bearing connection part
  • the rotation driving part includes a rotation driving part stator and a rotation driving part rotor , the rotor of the rotary driving part is connected to the motor shaft
  • the linear driving part includes a linear driving part stator and a linear driving part mover, and the linear driving part mover is connected to the motor shaft; the rotating driving part Together with the linear drive part, the motor shaft is driven to perform compound motion in the rotation direction and the linear direction.
  • the elastic bearing seat includes a first elastic bearing seat and a second elastic bearing seat, and one of the rotary driving part and the linear driving part is located between the first elastic bearing seat and the second elastic bearing seat. Between elastic bearing seats or between the rotary driving part and the linear driving part are located between the first elastic bearing seat and the second elastic bearing seat.
  • the elastic movable portion of the elastic bearing seat includes ribs, and the ribs are spiral or curved.
  • the rotor of the rotation driving part has a hollow part, and the motor shaft passes through the hollow part.
  • the rotor of the rotation driving part is a cylindrical magnet with a hollow part.
  • linear drive part mover has a hollow part, and the motor shaft passes through the hollow part.
  • the linear drive part mover includes a cylindrical mover yoke and a magnetic ring sleeved on the mover yoke.
  • the magnetic ring includes three sub-magnetic rings, the sub-magnetic rings are radiation magnetized, and the magnetic poles are N-S-N or S-N-S in sequence.
  • the linear drive part stator includes a second coil and a second stator core surrounding the outside of the second coil.
  • the opening of the second stator core faces the magnetic ring of the linear drive part
  • the second stator core has a shoe part
  • the shoe part of the second stator core faces two adjacent magnetic rings. In the middle of the ring.
  • the elastic coefficient of the elastic bearing seat is a preset specific value, which can make the axial vibration natural frequency of the corresponding motor shaft close to the linear drive operating frequency.
  • the composite motion motor with an elastic bearing seat also includes a rotating centering elastic component.
  • One end of the rotating centering elastic component is fixed and the other end is connected to the motor shaft to provide the motor shaft with a centering force in a rotation direction.
  • the elastic coefficient of the elastic component in the rotation loop is a preset specific value, which can make the corresponding natural frequency of circumferential vibration of the motor shaft close to the rotating drive operating frequency.
  • the present invention also provides an electric toothbrush with an elastic bearing seat motor, which includes the above motor.
  • the embodiment of the present application provides a composite motion motor with an elastic bearing seat.
  • the elastic bearing seat can be used to realize the feature of the motor shaft moving freely along the axial direction. Under the cooperation and action of the rotary drive part and the linear drive part, It realizes the compound motion in which the motor shaft's rotational direction and linear direction move together; of course, the rotational direction movement and the linear direction movement can be carried out at the same time, or they can be carried out independently.
  • the axial freedom of the motor shaft is achieved through the elastic deformation of the elastic bearing seat, without any friction between the motor shaft and structural components; while the circumferential freedom of the motor shaft is achieved through the bearing, and the bearing Since it is rolling friction, its friction resistance can also be ignored; therefore, the example of this application greatly reduces the operating resistance and improves the motor efficiency.
  • the rotary drive part and the linear drive part are installed in the same motor housing and jointly drive the same motor shaft, simplifying the structural components and reducing the size of the motor.
  • the axial vibration natural frequency of the motor shaft is close to the linear drive operating frequency of the motor, and the system resonance effect can be used to increase the amplitude or reduce the input power.
  • the natural frequency of the rotational vibration of the motor shaft is close to the rotational drive operating frequency of the motor.
  • the effect of system resonance can be used to increase the amplitude or reduce the input power.
  • the magnets of the rotary drive part and the mover yoke, magnetic ring, coil, and stator core of the linear drive part are all in the shape of cylinders or rings, which facilitates production, processing, and assembly.
  • Figure 1 is an exploded schematic diagram of a composite motion motor with an elastic bearing seat in an embodiment of the present invention
  • Figure 2 is a schematic cross-sectional view of a composite motion motor with an elastic bearing seat in an embodiment of the present invention
  • Figure 3 is a schematic three-dimensional structural diagram of an elastic bearing seat in an embodiment of the present invention.
  • Figure 4 is a schematic cross-sectional structural diagram of an elastic bearing seat in an embodiment of the present invention.
  • Figure 5 is a schematic diagram of the three-dimensional mechanism of the elastic bearing seat in another embodiment of the present invention.
  • Figure 6 is a schematic cross-sectional view of the elastic bearing seat in another embodiment of the present invention.
  • Figure 7 is a schematic three-dimensional structural diagram of a composite motion motor with an elastic bearing seat in an embodiment of the present invention.
  • Figure 8 is a schematic cross-sectional structural view of the rotation driving part in the embodiment of the present invention.
  • Figure 9 is a schematic three-dimensional structural diagram of the stator of the rotation drive part in the embodiment of the present invention.
  • Figure 10 is a schematic cross-sectional structural diagram of the linear drive part in the embodiment of the present invention.
  • 1 is the motor shaft
  • 2 is the bearing
  • 3 is the elastic bearing seat
  • 4 is the rotary drive part
  • 5 is the linear drive part
  • 6 is the motor shell
  • 7 is the rotating elastic part
  • 31 is the fixed part
  • 32 is the bearing.
  • 33 is the elastic movable part
  • 41 is the stator of the rotary drive part
  • 42 is the rotor of the rotary drive part
  • 51 is the stator of the linear drive part
  • 52 is the mover of the linear drive part
  • 331 is the rib
  • 411 is the first stator iron.
  • 412 is the first bobbin
  • 413 is the first coil
  • 421 is the magnet
  • 511 is the second stator core
  • 512 is the second bobbin
  • 513 is the second coil
  • 521 is the mover yoke
  • 522 is the magnetic ring.
  • 5111 is the shoe part
  • 5221 is the sub-magnetic ring.
  • the embodiment is a composite motion motor with an elastic bearing seat, including a motor shaft 1, a bearing 2 sleeved on the motor shaft, an elastic bearing seat 3 sleeved on the bearing 2, And the rotary drive part 4 and the linear drive part 5;
  • the rotary drive part 4 can drive the motor shaft 1 to achieve rotational motion
  • the linear drive part 5 can drive the motor shaft 1 to achieve linear motion
  • the elastic bearing seat 3 includes a fixed part 31.
  • the bearing connection part 32 connected to the bearing, and the elastic movable part 33 connecting the fixed part 31 and the bearing connection part 32.
  • the fixed part 31 is fixed to the motor housing 6.
  • the bearing connection part 32 is equipped with a bearing 2, and the bearing 2 is set on the motor shaft 1.
  • the elastic bearing seat The elastic movable portion 16 of 3 can be elastically deformed, so that the bearing connecting portion 32, the bearing 2 and the motor shaft 1 can move freely along the axial direction of the motor shaft 1.
  • the rotation driving part 4 includes a rotation driving part stator 41 and a rotation driving part rotor 42.
  • the rotation driving part rotor 42 is connected to the motor shaft 1.
  • the rotation driving part rotor 42 is connected to the motor shaft 1.
  • the rotary drive stator 41 is connected to the motor housing 6.
  • a rotary drive stator 41 can also be directly provided on the motor housing 6, that is, the motor housing 20 and the rotary drive stator 41 are integrally formed, and the rotary drive stator 41 and the rotary drive stator 41 are integrally formed.
  • the rotor 42 of the rotary driving part is used to realize the rotation of the motor shaft 1;
  • the linear driving part 5 includes a linear driving part stator 51 and a linear driving part mover 52, and the linear driving part mover 52 is connected to the motor shaft 1 ;
  • the linear drive part stator 51 is connected to the motor housing 6.
  • it can also be separated from the motor housing 6 and connected separately through the rear end cover or another motor housing.
  • the linear drive part stator 51 and the linear drive part The mover 52 is used to realize the linear motion of the motor shaft 1; in this way, the rotary driving part 4 and the linear driving part 5 can jointly drive the motor shaft 1 to perform composite motion in the rotational direction and the linear direction.
  • this motor can be used as the working motor of the electric toothbrush.
  • the rotation driving part 4 of the motor can drive the motor shaft 1 to rotate clockwise and counterclockwise repeatedly and alternately along the motor shaft 1 at high frequency, thereby producing a circumferential vibration effect.
  • the linear drive part 5 can drive the motor shaft 1 to repeatedly move forward and backward along the motor shaft 1 at high frequency, thereby producing an axial vibration effect. In this way, the motor shaft 1 can drive the toothbrush head to perform compound vibrations in the circumferential and axial directions to achieve all-round cleaning of the teeth.
  • the elastic bearing seat 3 includes a first elastic bearing seat and a second elastic bearing seat.
  • One of the rotary driving part 4 and the linear driving part 5 is is located between the first elastic bearing seat and the second elastic bearing seat, that is, the rotation driving part 4 is located between the first elastic bearing seat and the second elastic bearing seat, or the linear drive part 4 is located between the first elastic bearing seat and the second elastic bearing seat.
  • the part 5 is located between the first elastic bearing seat and the second elastic bearing seat, or the rotary driving part 4 and the linear driving part 5 are both located between the first elastic bearing seat and the second elastic bearing seat.
  • the rotation driving part 4 is located between the first elastic bearing seat and the second elastic bearing seat, making the motor structure more compact and effectively reducing the volume of the motor.
  • the elastic movable portion 33 of the elastic bearing seat 3 includes ribs 331.
  • the ribs 331 are spiral or curved. The purpose is to increase the length of the ribs 331. , so that the elastic movable portion 33 has a larger amount of deformation, and further allows the bearing connecting portion 32 to have a larger amount of movement in the axial direction.
  • the ribs 331 are provided with two or more than two. The radial stiffness of the elastic bearing seat 3 is improved, and the axial degree of freedom of the motor shaft is achieved through elastic deformation. This will not cause any friction between the motor shaft 1 and the structural components, greatly reducing the operating resistance and improving the motor efficiency.
  • the elastic bearing seat 3 is in the shape of a dome.
  • the elastic movable part 33 connects the fixed part 31 and the bearing connection part 32 through ribs 331 with various degrees of curvature and thickness, so that the elastic movable part It is hollow-shaped and has strong elastic deformation ability. At the same time, it can support the bearing 2 and the motor shaft 1 installed on the elastic bearing seat 3 in the radial direction.
  • the elastic bearing seat 3 with ribs 331 in a spiral shape is an elastic movable portion formed by two ribs 331 spiraling upward along the central axis symmetrically.
  • This spiral structure not only has elastic deformation capacity similar to that of a spring, but also has high structural strength and support capacity, and can support the bearing 2 and the motor shaft 1 installed on the elastic bearing seat 3 in the radial direction.
  • the elastic bearing seat 3 is made of fatigue-resistant material.
  • the material is selected as PEEK (polyetheretherketone) or spring steel. Its strong fatigue-resistant characteristics are used to solve the problem of frequent The problem that the elastic movable part 33 is easily broken due to the elastic deformation can effectively increase the service life of the elastic bearing seat 3.
  • the rotary drive part rotor 42 has a hollow part, and the motor shaft 1 passes through the hollow part.
  • the rotary drive part rotor 42 It is a cylindrical magnet 421 with a hollow part.
  • the magnet 421 is covered and fixedly connected to the motor shaft 1;
  • the rotary drive part stator 41 includes a first wire frame 412, a first stator core 411 and a first coil 413.
  • the first wire frame 412 is wrapped on the first stator core 411, and the first coil 413 is wound around the first wire frame 412.
  • the three first coils 413 are evenly arranged around the motor shaft 1 in the circumferential direction. When the three first coils 413 are energized, they generate a magnetic field that changes with time.
  • On the magnet 421, a torque is generated to rotate the magnet 421, driving the motor shaft 1 to rotate alternately in forward and reverse directions.
  • the linear drive part mover 52 has a hollow part, and the motor shaft 1 passes through the hollow part.
  • the linear drive part mover 52 includes Cylindrical mover yoke 521 and a magnetic ring 522 sleeved on the mover yoke 521.
  • the cylindrical mover yoke 521 has a hollow portion.
  • the motor shaft 1 extends from the mover yoke 521.
  • the magnetic ring 522 includes three sub-magnetic rings 5221.
  • the sub-magnetic rings 5221 are arranged in sequence along the axial direction of the motor shaft 1.
  • the magnetic poles of any sub-magnetic ring 5221 are consistent with the magnetic poles of the adjacent sub-magnetic rings 5221.
  • the magnetic ring 522 is provided with three sub-magnetic rings 5221.
  • the sub-magnetic rings 5221 are radiation magnetized, and their magnetic poles along the axial direction of the motor shaft 1 are from left to right. They are N-S-N or S-N-S respectively, ensuring that the sub-magnetic rings 5221 of the same magnetic pole can be distributed at intervals.
  • the linear drive part stator 51 includes a second coil 513, a second stator core 511 surrounding the second coil 513, and a second wire frame 512, wherein The overall structure of the second stator core 511 is ring-shaped, and an opening is provided inside the ring.
  • the second coil 513 is wound around the second wire frame 512 to obtain support.
  • the second wire frame 512 is provided on The inside of the second stator core 511 .
  • the opening of the second stator core 511 faces the magnetic ring 522 of the linear driving part 5 .
  • the second stator core 511 has a shoe portion 5111 , and the shoe portion 5111 of the second stator core 511 faces each other.
  • the working principle of the linear drive part 5 is as follows: after the second coil 513 is energized, an electromagnetic field with alternating magnetic poles, that is, a second magnetic field, is formed by changing the direction of the current.
  • the magnetic ring 522 is affected by the third magnetic field.
  • the action of the electromagnetic force in the second magnetic field drives the motor shaft 1 together to move forward or backward along the axial direction.
  • the elastic coefficient of the elastic bearing seat 3 is a preset specific value. This value can make the axial vibration natural frequency of the corresponding motor shaft 1 close to the linear drive operating frequency.
  • the design is such that the axial vibration natural frequency of the motor shaft 1 is close to the linear drive operating frequency of the motor, and the effect of system resonance can be used to increase the amplitude or reduce the input power.
  • the compound motion motor with an elastic bearing seat also includes a rotating centering elastic component 7.
  • the rotating centering elastic component 7 can return the motor shaft 1 to the preset starting position.
  • one end of the rotational centering elastic component 7 is fixed, and the other end can be directly connected to the motor shaft 1 to provide the motor shaft 1 with a centering force in one direction of rotation; in another embodiment of the present invention, the rotational centering elastic component 7 is fixed.
  • Component 7 includes a connecting piece that is sleeved on the motor shaft 1, and an elastic piece with one end connected to the connecting piece and the other end connected to the motor housing; when the motor shaft 1 rotates, the connecting piece is driven to rotate, causing the elastic piece to deform.
  • the elastic member gives the motor shaft a force to return to the initial position.
  • This centering force constrains the circumferential position of the motor shaft near the preset starting position; and when the motor shaft 1 stops rotating, the elastic member can also pass through the connecting piece Drive motor shaft 1 to return to the preset starting position.
  • the elastic coefficient of the rotating elastic component 7 is a preset specific value, which can make the natural frequency of rotational vibration of the corresponding motor shaft 1 close to the rotational drive operating frequency. Through the optimized design of the rotating elastic component 7, Make the natural frequency of the rotational vibration of the motor shaft 1 close to the rotational drive operating frequency of the motor, and use the effect of system resonance to increase the amplitude or reduce the input power.
  • an electric toothbrush uses the composite motion motor in the above embodiment as a working motor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Brushes (AREA)

Abstract

本发明提供一种具有弹性轴承座的复合运动电机，其特征在于：包括电机轴、套设于所述电机轴的轴承、套设于所述轴承的弹性轴承座、以及旋转驱动部和直线驱动部，所述弹性轴承座包括固定部、与轴承连接的轴承连接部、以及连接着所述固定部与所述轴承连接部的弹性活动部；所述旋转驱动部包括旋转驱动部定子和旋转驱动部转子，所述旋转驱动部转子与所述电机轴连接；所述直线驱动部包括直线驱动部定子和直线驱动部动子，所述直线驱动部动子与所述电机轴连接；本发明利用弹性轴承座可以实现电机轴沿轴向自由活动的特点，在旋转驱动部和直线驱动部的配合和作用下，实现了电机轴的旋转方向和直线方向的复合运动。

Description

一种具有弹性轴承座的复合运动电机及电动牙刷
本发明对申请日为2022年6月24日、申请号为CN2022107270379、名称为：一种具有弹性轴承座的复合运动电机及电动牙刷的中国专利申请要求优先权。
技术领域
本发明属于电动机领域，尤其涉及一种具有弹性轴承座的复合运动电机。
背景技术
在现有的实现复合运动的专利中，一般要么是通过两个独立的电机来实现其复合运动的，即一个独立的电机实现电机轴的上下运动，另一个独立的电机实现电机轴的前后直线运动，例如松下的电动牙刷产品；此种复合运动与本申请专利的复合运动并不相同。
要么请参考专利申请号为“201110420200.9”，发明名称为“一种动磁式直线旋转二自由度电机”其只是通过理论，简单的公开了通过设置两个共用一个电机轴的电机，一个电磁驱动部分实现电机轴的左右旋转运动，另一个电磁驱动部分实现电机轴的前后直线运动部分，然而这种专利仅仅公开电磁驱动部分的设计方案，完全没有提及结构部分的设计，无法真正的应用到实际产品上；
又或者有提及结构部分设计的专利，请参考专利申请号为“202110858485.8”，发明名称为“一种用于Z轴的二自由度电机及其装配方法”的发明专利，其所公开的结构部分是在轴上开槽通过轴套配合，当轴前后运动时，轴套与轴是滑动摩擦，导致摩擦损耗大，电机效率低，使用寿命短；以及申请号为“201310422927.2”，发明名称为“一种直线旋转永磁电机”的发明专利，虽然也公开了结构部分，同样的，只是通过简单的轴承支撑轴滑动摩擦，同样存在摩擦损耗大，电机效率低，使用寿命短的问题。
发明内容
鉴于以上所述现有技术的缺点，本发明的目的在于提供具有弹性轴承座的复 合运动电机以解决上述背景技术的缺陷。
本申请方案提供一种具有弹性轴承座的复合运动电机，包括：电机轴、套设于所述电机轴的轴承、套设于所述轴承的弹性轴承座，以及旋转驱动部、直线驱动部，所述弹性轴承座包括固定部、与轴承连接的轴承连接部、以及连接着所述固定部与所述轴承连接部的弹性活动部；所述旋转驱动部包括旋转驱动部定子和旋转驱动部转子，所述旋转驱动部转子与所述电机轴连接；所述直线驱动部包括直线驱动部定子和直线驱动部动子，所述直线驱动部动子与所述电机轴连接；所述旋转驱动部和直线驱动部共同驱动所述电机轴做旋转方向和直线方向的复合运动。
进一步地，所述弹性轴承座包括第一弹性轴承座和第二弹性轴承座，所述旋转驱动部和所述直线驱动部的两者之一位于所述第一弹性轴承座和所述第二弹性轴承座之间或所述旋转驱动部和所述直线驱动部均位于所述第一弹性轴承座和所述第二弹性轴承座之间。
进一步地，所述弹性轴承座的弹性活动部包括筋条，所述筋条呈螺旋状，或弯曲设置。
进一步地，所述旋转驱动部转子具有中空部，所述电机轴从所述中空部穿过。
进一步地，所述旋转驱动部转子为具有中空部的圆柱形磁铁。
进一步地，所述直线驱动部动子具有中空部，所述电机轴从所述中空部穿过。
进一步地，所述直线驱动部动子包括圆柱形动子磁轭和套设于所述动子磁轭上的磁环。
进一步地，所述磁环包括三个子磁环，所述子磁环是辐射充磁，磁极依次为N-S-N或S-N-S。
进一步地，所述直线驱动部定子包括第二线圈和包围于所述第二线圈外侧的第二定子铁芯。
进一步地，所述第二定子铁芯的开口朝向所述直线驱动部的磁环，所述第二定子铁芯具有靴部，所述第二定子铁芯的靴部正对相邻两个磁环中间。
进一步地，所述弹性轴承座的弹性系数为预设特定值，该值能够使得所对应电机轴的轴向振动固有频率与直线驱动工作频率相近。
进一步地，所述具有弹性轴承座的复合运动电机还包括旋转回中弹性部件，所述旋转回中弹性部件一端固定，另一端连接电机轴，提供给电机轴一个旋转方向的回中力。
进一步地，所述旋转回中弹性部件的弹性系数为预设特定值，该值能够使得所对应的电机轴周向振动固有频率与旋转驱动工作频率相近。
进一步地，本发明还提供一种具有弹性轴承座电机的电动牙刷，该电动牙刷包括上述电机。
本申请的改进带来如下优点：
(1)本申请实施例提供的一种具有弹性轴承座的复合运动电机，利用弹性轴承座可以实现电机轴沿轴向自由活动的特点，在旋转驱动部和直线驱动部的配合和作用下，实现了电机轴的旋转方向和直线方向共同运动的复合运动；当然旋转方向的运动和直线方向的运动可以同时进行，也可以分别独立进行。
(2)进一步的，电机轴的轴向自由度是通过弹性轴承座的弹性变形实现的，不存在电机轴与结构部件的任何摩擦；而电机轴的周向自由度是通过轴承实现的，轴承由于是滚动摩擦，其摩擦阻力也可以忽略不计；所以本申请实例极大地减小了运行阻力，提高了电机效率。
(3)进一步的，旋转驱动部和直线驱动部都安装在同一个电机外壳里，共同驱动同一根电机轴，精简了结构部件，减小了电机的体积。
(4)进一步的，通过对弹性轴承座的优化设计，使电机轴的轴向振动固有频率接近电机的直线驱动工作频率，利用系统共振的效应可以增大振幅或降低输入功率。
(5)进一步的，通过对旋转回中弹性部件的优化设计，使电机轴的旋转振动固有频率接近电机的旋转驱动工作频率，利用系统共振的效应可以增大振幅或降低输入功率。
(6)进一步的，旋转驱动部的磁铁以及直线驱动部的动子磁轭、磁环、线圈、定子铁芯都是圆柱或圆环的形状，便于生产加工和配合组装。
附图说明
图1为本发明实施例中一种具有弹性轴承座的复合运动电机的爆炸示意图；
图2为本发明实施例中一种具有弹性轴承座的复合运动电机的剖面示意图；
图3为本发明实施例中弹性轴承座的立体结构示意图；
图4为本发明实施例中弹性轴承座的剖面结构示意图；
图5为本发明另一个实施例中弹性轴承座的立体机构示意图；
图6为本发明另一个实施例中弹性轴承座的剖面机构示意图；
图7为本发明实施例中一种具有弹性轴承座的复合运动电机的立体结构示意图；
图8为本发明实施例中旋转驱动部的剖面结构示意图
图9为本发明实施例中旋转驱动部定子的立体结构示意图；
图10为本发明实施例中直线驱动部的剖面结构示意图；
其中，1为电机轴，2为轴承，3为弹性轴承座，4为旋转驱动部，5为直线驱动部，6为电机外壳，7为旋转回中弹性部件，31为固定部，32为轴承连接部，33为弹性活动部，41为旋转驱动部定子，42为旋转驱动部转子，51为直线驱动部定子，52为直线驱动部动子，331为筋条，411为第一定子铁芯，412为第一线架，413为第一线圈，421为磁铁，511为第二定子铁芯，512为第二线架，513为第二线圈，521为动子磁轭，522为磁环，5111为靴部，5221为子磁环。
具体实施方式
以下通过特定的具体实例说明本发明的实施方式，本领域技术人员可由本说明书所揭露的内容轻易地了解本发明的其他优点与功效。本发明还可以通过另外不同的具体实施方式加以实施或应用，本说明书中的各项细节也可以基于不同观点与应用，在没有背离本发明的精神下进行各种修饰或改变。
如图1-10所示，实施例一种具有弹性轴承座的复合运动电机，包括电机轴1、套设于所述电机轴的轴承2、套设于所述轴承2的弹性轴承座3、以及旋转驱动部 4和直线驱动部5；所述旋转驱动部4能够带动电机轴1实现旋转运动，所述直线驱动部5能够带动电机轴1实现直线运动；所述弹性轴承座3包括固定部31、与轴承连接的轴承连接部32、以及连接着所述固定部31与所述轴承连接部32的弹性活动部33，优选的，所述固定部31与电机外壳6固定，当然，也可以，所述固定部31与所述电机外壳6一体成型设置，简化了结构，所述轴承连接部32内套设有轴承2，所述轴承2套设于电机轴1上，所述弹性轴承座3的弹性活动部16可以弹性变形，使轴承连接部32、轴承2及电机轴1能够沿电机轴1的轴向自由活动。
进一步的，请参阅图2和图8，所述旋转驱动部4包括旋转驱动部定子41和旋转驱动部转子42，所述旋转驱动部转子42与所述电机轴1连接，优选的，所述旋转驱动部定子41与电机外壳6连接，当然，也可以在电机外壳6上直接设置有一旋转驱动部定子41，即电机外壳20与旋转驱动部定子41一体成型，所述旋转驱动部定子41与旋转驱动部转子42用于实现电机轴1的旋转运动；所述直线驱动部5包括直线驱动部定子51和直线驱动部动子52，所述直线驱动部动子52与所述电机轴1连接；优选的，所述直线驱动部定子51与电机外壳6连接，当然，也可以与电机外壳6分开，单独通过后端盖或另一个电机外壳连接，所述直线驱动部定子51和直线驱动部动子52用于实现电机轴1的直线运动；如此，所述旋转驱动部4和直线驱动部5能够共同驱动所述电机轴1做旋转方向和直线方向的复合运动。
其中，请参阅图7，该电机可以作为电动牙刷的工作电机。电机的旋转驱动部4能够驱动电机轴1高频地沿电机轴1顺时针与逆时针反复交替转动，进而产生周向振动效果。直线驱动部5能够驱动电机轴1高频地沿电机轴1往前与往后反复交替运动，进而产生轴向振动效果。如此，电机轴1可以带动牙刷刷头做周向与轴向的复合振动，实现对牙齿的全方位清洁。
作为一个实施例，请参阅图1、图2，所述弹性轴承座3包括第一弹性轴承座和第二弹性轴承座，所述旋转驱动部4和所述直线驱动部5的两者之一位于所述第一弹性轴承座和所述第二弹性轴承座之间，即所述旋转驱动部4位于所述第一弹性轴承座和所述第二弹性轴承座之间，或所述直线驱动部5位于所述第一弹性 轴承座和所述第二弹性轴承座之间，或所述旋转驱动部4和所述直线驱动部5均位于所述第一弹性轴承座和所述第二弹性轴承座之间；本实施例中，所述旋转驱动部4位于所述第一弹性轴承座和所述第二弹性轴承座之间，使得电机结构更加紧凑，有效减小了电机的体积。
进一步的，请参阅图3-图6，所述弹性轴承座3的弹性活动部33包括筋条331，所述筋条331呈螺旋状，或弯曲设置，其目的是为了增加筋条331的长度，使得所述弹性活动部33具有较大的形变量，进一步可使得轴承连接部32具有较大的轴向方向活动量，优选的，所述筋条331设置有两条或两条以上，以提高弹性轴承座3的径向刚度，通过弹性变形实现电机轴的轴向自由度，不会使得电机轴1与结构部件产生的任何摩擦，极大地减小了运行阻力，提高了电机效率。
请参阅图3、图4，弹性轴承座3呈圆盖形，所述弹性活动部33通过各种不同弯曲程度以及粗细程度的筋条331连接固定部31以及轴承连接部32，使得弹性活动部呈镂空状，具有较强的弹性形变能力，同时能够在径向上支撑安装在弹性轴承座3上的轴承2及电机轴1。
请参阅图5、图6，所述筋条331呈螺旋状的弹性轴承座3，是采用两个筋条331中心对称地沿中心轴线螺旋上升形成的弹性活动部。这种螺旋结构在具有类似于弹簧的弹性形变能力的同时，还具有较高的结构强度和支撑能力，能够在径向上支撑安装在弹性轴承座3上的轴承2及电机轴1。
作为一个实施例，所述弹性轴承座3为耐疲劳材料制成，优选的，所述材料选取为PEEK(聚醚醚酮)或者弹簧钢，利用其强大的耐疲劳的特性，解决了经常性的弹性形变所带来的弹性活动部33容易断裂的问题，能够有效提升弹性轴承座3的使用寿命。
作为一个实施例，请参阅图2、图8和图9，所述旋转驱动部转子42具有中空部，所述电机轴1从所述中空部穿过，具体的，所述旋转驱动部转子42为具有中空部的圆柱形磁铁421，所述磁铁421包覆并固定连接于电机轴1；所述旋转驱动部定子41包括第一线架412、第一定子铁芯411以及第一线圈413，第一线架412 包覆在第一定子铁芯411上，第一线圈413缠绕于第一线架412上。本实施例中，所述第一线圈413设置有三个，所述三个第一线圈413周向环绕电机轴1均匀排布，三个第一线圈413通电后产生一个随时间变化的磁场，作用于磁铁421上，进而产生一个使磁铁421旋转的转矩，带动电机轴1作正向与反向交替进行的旋转运动。
作为一个实施例，请参阅图2、图10，所述直线驱动部动子52具有中空部，所述电机轴1从所述中空部穿过，具体的，所述直线驱动部动子52包括圆柱形动子磁轭521和套设于所述动子磁轭521上的磁环522，所述圆柱形动子磁轭521具有中空部，所述电机轴1从所述动子磁轭521的中空部穿过，所述磁环522包括三个子磁环5221，子磁环5221沿电机轴1的轴向依次排布，任一子磁环5221的磁极与相邻子磁环5221的磁极均相反。在一个具体示例中，如图6所示，所述磁环522设有3个子磁环5221，所述子磁环5221是辐射充磁，其沿电机轴1的轴向的磁极从左到右分别为N-S-N或S-N-S，保证同磁极的子磁环5221能够间隔分布。
作为一个实施例，请继续参阅图2、图10，所述直线驱动部定子51包括第二线圈513、包围于所述第二线圈513外侧的第二定子铁芯511以及第二线架512，其中所述第二定子铁芯511的整体结构呈环状，并在环内侧设有开口，所述第二线圈513缠绕在所述第二线架512上以获得支撑，所述第二线架512设置在所述第二定子铁芯511的内部。所述第二定子铁芯511的开口朝向所述直线驱动部5的磁环522，所述第二定子铁芯511具有靴部5111，所述第二定子铁芯511的靴部5111正对相邻两个磁环522中间；所述直线驱动部5的工作原理如下：给第二线圈513通电后，通过改变电流的方向，形成磁极交替变化的电磁场，即第二磁场，磁环522受到第二磁场中电磁力的作用，带动电机轴1一起，从而沿轴向向前或向后运动。
作为一个实施例，所述弹性轴承座3的弹性系数为预设特定值，该值能够使得所对应电机轴1的轴向振动固有频率与直线驱动工作频率相近，通过对弹性轴承座3的优化设计，使所述电机轴1的轴向振动固有频率接近所述电机的直线驱 动工作频率，利用系统共振的效应可以增大振幅或降低输入功率。
作为一个实施例，所述具有弹性轴承座的复合运动电机还包括旋转回中弹性部件7，在该电机停止运转时，旋转回中弹性部件7能够将电机轴1回复到预设的起始位置。具体的，所述旋转回中弹性部件7一端固定，另一端可直接连接电机轴1，提供给电机轴1一个旋转方向的回中力；本发明另一实施例中，所述旋转回中弹性部件7包括套设在电机轴1上的连接件，以及一端与连接件连接、另一端与该电机外壳连接的弹性件；当电机轴1转动时，带动连接件旋转，使弹性件发生形变，因而弹性件给电机轴一个回复到初始位置的力，该回中力把电机轴的周向位置约束在预设起始位置附近；而当电机轴1停止转动时，弹性件还可以通过连接件带动电机轴1回复至预设起始位置。
所述旋转回中弹性部件7的弹性系数为预设特定值，该值能够使得所对应电机轴1的旋转振动固有频率与旋转驱动工作频率相近，通过对旋转回中弹性部件7的优化设计，使电机轴1的旋转振动固有频率接近电机的旋转驱动工作频率，利用系统共振的效应可以增大振幅或降低输入功率。
作为一个实施例，一种使用上述实施例中的复合运动电机作为工作电机的电动牙刷。
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应该以权利要求的保护范围为准。

Claims (14)

  1. 一种具有弹性轴承座的复合运动电机，其特征在于：包括电机轴、套设于所述电机轴的轴承、套设于所述轴承的弹性轴承座、以及旋转驱动部和直线驱动部，所述弹性轴承座包括固定部、与轴承连接的轴承连接部、以及连接着所述固定部与所述轴承连接部的弹性活动部；所述旋转驱动部包括旋转驱动部定子和旋转驱动部转子，所述旋转驱动部转子与所述电机轴连接；所述直线驱动部包括直线驱动部定子和直线驱动部动子，所述直线驱动部动子与所述电机轴连接；所述旋转驱动部和直线驱动部共同驱动所述电机轴做旋转方向和直线方向的复合运动。
  2. 根据权利要求1所述的一种具有弹性轴承座的复合运动电机，其特征在于，所述弹性轴承座包括第一弹性轴承座和第二弹性轴承座，所述旋转驱动部和所述直线驱动部的两者之一位于所述第一弹性轴承座和所述第二弹性轴承座之间或所述旋转驱动部和所述直线驱动部均位于所述第一弹性轴承座和所述第二弹性轴承座之间。
  3. 根据权利要求1所述的一种具有弹性轴承座的复合运动电机，其特征在于，所述弹性轴承座的弹性活动部包括筋条，所述筋条呈螺旋状，或弯曲设置。
  4. 根据权利要求1所述的一种具有弹性轴承座的复合运动电机，其特征在于，所述旋转驱动部转子具有中空部，所述电机轴从所述中空部穿过。
  5. 根据权利要求4所述的一种具有弹性轴承座的复合运动电机，其特征在于，所述旋转驱动部转子为具有中空部的圆柱形磁铁。
  6. 根据权利要求1所述的一种具有弹性轴承座的复合运动电机，其特征在于，所述直线驱动部动子具有中空部，所述电机轴从所述中空部穿过。
  7. 根据权利要求1所述的一种具有弹性轴承座的复合运动电机，其特征在于，所述直线驱动部动子包括圆柱形动子磁轭和套设于所述动子磁轭上的磁环。
  8. 根据权利要求7所述的一种具有弹性轴承座的复合运动电机，其特征在于，所述磁环包括三个子磁环，所述子磁环是辐射充磁，磁极依次为N-S-N或S-N-S。
  9. 根据权利要求1所述的一种具有弹性轴承座的复合运动电机，其特征在于，所述直线驱动部定子包括第二线圈和包围于所述第二线圈外侧的第二定子铁芯。
  10. 根据权利要求9所述的一种具有弹性轴承座的复合运动电机，其特征在于，所述第二定子铁芯的开口朝向所述直线驱动部的磁环，所述第二定子铁芯具有靴部，所述第二定子铁芯的靴部正对相邻两个磁环中间。
  11. 根据权利要求1所述的一种具有弹性轴承座的复合运动电机，其特征在于，所述弹性轴承座的弹性系数为预设特定值，该值能够使得所对应电机轴的轴向振动固有频率与直线驱动工作频率相近。
  12. 根据权利要求1所述的一种具有弹性轴承座的复合运动电机，其特征在于，所述具有弹性轴承座的复合运动电机还包括旋转回中弹性部件，所述旋转回中弹性部件一端固定，另一端连接电机轴，提供给电机轴一个旋转方向的回中力。
  13. 根据权利要求12所述的一种具有弹性轴承座的复合运动电机，其特征在于，所述旋转回中弹性部件的弹性系数为预设特定值，该值能够使得所对应的电机轴周向振动固有频率与旋转驱动工作频率相近。
  14. 一种具有弹性轴承座复合运动电机的电动牙刷，其特征在于，包括权利要求1-13任一项所述的复合运动电机。
PCT/CN2022/104217 2022-06-24 2022-07-06 一种具有弹性轴承座的复合运动电机及电动牙刷 WO2023245734A1 (zh)

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GB1248048A (en) * 1967-10-11 1971-09-29 Licentia Gmbh An electrical appliance with an electric motor mounted by means of a vibration-inhibiting element
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JP2018159406A (ja) * 2017-03-22 2018-10-11 Ntn株式会社 電動アクチュエータ
CN113315331A (zh) * 2021-07-28 2021-08-27 深圳双十科技有限公司 一种用于z轴的二自由度电机及其装配方法
CN215458885U (zh) * 2021-06-04 2022-01-11 深圳市一晤未来科技有限公司 一种电动牙刷的电机轴回中机构

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FR704440A (fr) * 1929-10-31 1931-05-20 Aeg Montage de paliers pour moteurs à grande vitesse, en particulier pour machines centrifuges et broches
GB1248048A (en) * 1967-10-11 1971-09-29 Licentia Gmbh An electrical appliance with an electric motor mounted by means of a vibration-inhibiting element
CN103475178A (zh) * 2013-09-30 2013-12-25 东南大学 一种直线旋转永磁电机
JP2018159406A (ja) * 2017-03-22 2018-10-11 Ntn株式会社 電動アクチュエータ
CN215458885U (zh) * 2021-06-04 2022-01-11 深圳市一晤未来科技有限公司 一种电动牙刷的电机轴回中机构
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