CN114421729A

CN114421729A - High-voltage direct-current permanent magnet motor applied to medical instruments and household products such as tooth washing device and hair scissors

Info

Publication number: CN114421729A
Application number: CN202111503101.7A
Authority: CN
Inventors: 陈诚
Original assignee: A BETTER ELECTRICAL MANUFACTURING (SHENZHEN) CO LTD
Current assignee: A BETTER ELECTRICAL MANUFACTURING (SHENZHEN) CO LTD
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-04-29

Abstract

The invention provides a high-voltage direct-current permanent magnet motor applied to medical instruments and household products such as a tooth washing device, a hair cutter and the like, which at least comprises a rotor structure, a stator structure, an end cover structure and a commutator, wherein the rotor structure is arranged in the stator structure and comprises a rotating shaft, the rotor core is of a large rotor structure, the outer diameter phi of the rotor core is 19.3mm, 5 symmetrical grooves are formed in the rotor core, the tooth width of the rotor core is 2.4mm, the groove width of the rotor core is 1.5mm, insulation powder layers are sprayed in the grooves of the rotor core, the end face and the outer circle of the rotor core through a spraying process, the commutator is a large commutator with the outer diameter phi of 7.0mm, insulation paint is coated on the wire harness winding, the stator structure comprises a stator shell, a magnetic increasing ring and a magnet, the outer wall of the stator shell is fixedly sleeved with the magnetic increasing ring, and a ball cup is mounted on the end cover shell. The high-voltage direct-current permanent magnet motor has the advantages of long service life, low noise, good insulation and voltage resistance, no need of transformer transformation power supply and low cost.

Description

High-voltage direct-current permanent magnet motor applied to medical instruments and household products such as tooth washing device and hair scissors

Technical Field

The invention relates to the technical field of motors, in particular to a high-voltage direct-current permanent magnet motor applied to medical instruments such as tooth washers, hair scissors and the like and household products.

Background

At present, two common tooth washing devices and hair scissors are available on the market, one is powered by a battery, the motor used by the tooth washing device is a low-voltage direct current motor (DC3.7V or 7.4V), the working current of the tooth washing device is large, the service time of the battery is limited, a user needs to charge the battery every day, the use of the user is very inconvenient, the battery belongs to flammable and explosive dangerous articles, the tooth washing device is not environment-friendly, the use of the user is very unsafe, the other is directly used by plugging in household electricity, the motor used by the tooth washing device is a low-voltage direct current motor (DC3.7V or 7.4V), the household electricity needs to be rectified and then reduced by a transformer to supply power to the rated voltage of the motor, and the cost is high;

the traditional low-voltage motor rotor with the same model generally adopts a phi 17mm series iron core, the magnet adopts a dry-pressed ferrite magnet with a concentric structure, the thickness of the magnet is 4.3mm, the commutator uses a small commutator with the outer diameter of phi 5.4mm, the rotor is coated with insulating powder, the insulation powder is coated between chip slots and on the end face, the excircle of the chip is not coated, the structure of the chip is mainly limited by the structure of the motor, if the motor is directly designed into a DC120V motor by adopting the traditional structure, the full rate of a winding slot of the rotor is high, the creepage distance is insufficient, the motor cannot pass UL safety test and withstand voltage (1250V) test;

if the motor with the DC120V is designed by directly adopting the traditional structure, the outer diameter of the commutator is small, the voltage between the segments is high, the commutation spark is large, and the service life of the motor is short;

the traditional low-voltage direct-current motor has large cogging torque, high noise and poor experience and comfort of consumers.

Therefore, a high voltage dc permanent magnet motor applied to medical appliances such as a tooth washing machine, a hair clipper and a household product is needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a high-voltage direct-current permanent magnet motor applied to medical instruments and household products such as tooth washers, hair scissors and the like, which has the advantages of long service life, low noise, good insulation and voltage resistance, no need of transformer transformation power supply and low cost.

In order to achieve the purpose, the invention is realized by the following technical scheme: a high-voltage direct-current permanent magnet motor applied to medical instruments and household products such as tooth washers, hair scissors and the like at least comprises a rotor structure, a stator structure, an end cover structure and a commutator, wherein the rotor structure is installed in the stator structure and comprises a rotating shaft and a plurality of superposed and fixed rotor chips installed on the rotating shaft, the rotor chips are wound with wire harness windings, the wire harness windings are matched with a commutator hook to hang winding wires, the rotor chips adopt a large rotor structure, the outer diameter phi of 19.3mm is provided with 5 symmetrical slots, the tooth width of 2.4mm and the slot width of 1.5mm, the inner slots, the end faces and the outer circle of the rotor chips are sprayed with an insulating powder layer through a spraying process, the commutator adopts a large commutator with the outer diameter phi of 7.0mm, the wire harness windings are coated with insulating paint, the stator structure comprises a stator shell, a reinforcing magnet and a magnet, the magnet is divided into an N pole and an S pole which are symmetrically fixed on the inner wall of the stator shell respectively, the outer wall of the stator shell is fixedly sleeved with a magnetism increasing ring corresponding to the position of the magnet, the end cover structure comprises an end cover shell, a ball cup, a rivet, an electric brush assembly, a cup cover, a carbon brush and shock-absorbing glue, the end cover shell is fixed with the stator shell in a matched mode, and the ball cup assembled with the rotating shaft in a matched mode is installed on the end cover shell.

Preferably, the wire harness winding and the commutator hook are matched to hang the winding mode and the patent: 202011267050.8 the motor and its rotor are identical.

Preferably, the magnet is a Y35 high-performance wet-pressed ferrite magnet with an eccentric structure, the thickness is 2.85mm, the length is 27.5mm, and the inner and outer circles are eccentric by 0.4 mm.

Preferably, the end cover shell is located the outside of ball cup formula and is installed the cup cover, the outside that the end cover shell is located the cup cover is equipped with carbon brush and brush subassembly, the carbon brush adopts the material that copper content is low, the resistivity is high.

Preferably, one side of the carbon brush is provided with shock absorption glue.

The invention provides a high-voltage direct-current permanent magnet motor applied to medical instruments and household products such as a tooth washing device, a hair cutter and the like. The method has the following beneficial effects:

1. the high-voltage direct-current permanent magnet motor with the rated voltage DV120V is applied to the American market, can directly use household electricity, does not need to be powered by a battery, is safe, energy-saving and environment-friendly, does not need to charge products every day, and is convenient and quick to use;

2. the product can be used after being connected with a household power supply, only the household alternating current power supply is converted into direct current through a rectifier bridge to supply power to the motor, voltage reduction is not needed through a transformer or an adapter, and the product cost is greatly reduced;

3. the problem of insulation and voltage resistance required by UL safety regulations can be effectively solved;

4. the service life of the motor is greatly prolonged and can reach 1000H;

5. the cogging torque and the noise of the motor are reduced, the noise can be controlled below 48dB, and the experience and the comfort of consumers are greatly improved.

Drawings

FIG. 1 is a schematic structural diagram of a high voltage DC permanent magnet motor for medical appliances and household products such as a tooth washing machine, a hair clipper and the like according to the present invention;

FIG. 2 is a schematic structural diagram of a rotor chip of a high-voltage DC permanent magnet motor applied to medical appliances and household products such as a tooth washing machine, a hair clipper and the like according to the invention;

FIG. 3 is a schematic structural diagram of an end cap of a high voltage DC permanent magnet motor of the present invention for use in medical appliances and household products such as a dental rinser, a hair clipper, etc.;

fig. 4 is a schematic view of a winding structure of a hook 5 groove and a rotor chip 5 groove of a high-voltage direct-current permanent magnet motor commutator applied to medical appliances such as a tooth washing device, a hair cutter and the like and household products.

In the figure: the motor stator comprises a stator shell 1, a rotor chip 2, an end cover shell 3, a magnetic enhancement ring 4, a magnet 5, a wire harness winding 6, a commutator 7, a bakelite meson 8, a rotating shaft 9, a ball cup 10, a rivet 18, a brush component 20, a cup cover 22, a carbon brush 23 and shock-absorbing glue 24.

Detailed Description

The invention is further described with reference to the following drawings and detailed description:

in the description of the present invention, it should be noted that the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-4, a high voltage dc permanent magnet motor applied to medical devices and household products such as tooth washing device, hair scissors, etc., at least comprises a rotor structure, a stator structure, an end cap structure and a commutator 7, wherein the rotor structure is installed in the stator structure and comprises a rotating shaft 9 and a plurality of rotor chips 2 which are fixedly overlapped and installed on the rotating shaft 9, the rotor chips 2 are wound with wire harness windings 6, the wire harness windings 6 are matched with the commutator 7 to hang and wind wires, the rotor chips 2 are of a large rotor structure, the outer diameter phi of the rotor chips is 19.3mm, and are provided with symmetrical 5 slots, the tooth width of the rotor chips is 2.4mm, the slot width of the rotor chips is 1.5mm, the inner, the end and the outer circle of the rotor chips 2 are sprayed with an insulating powder layer by a spraying process to improve the insulation and voltage resistance of the motor, the commutator 7 is a large commutator with the outer diameter phi of 7.0mm, the windings 6 are coated with insulating paint, stator structure includes stator casing 1, increases magnetic ring 4 and magnet 5, magnet 5 divide into N utmost point and S utmost point difference symmetry and fixes the inner wall at stator casing 1, stator casing 1' S outer wall cup joints and is fixed with the magnetic ring 4 that increases who corresponds with magnet 5 position, end cover structure includes end cover casing 3, ball cup 10, rivet 18, brush subassembly 20, cup cover 22, carbon brush 23 and shockproof glue 24, end cover casing 3 is fixed with stator casing 1 cooperation, install the ball cup 10 with pivot cooperation assembly on the end cover casing 3, rivet 18 is used for fixing stator casing 1 and end cover casing 3, and bakelite meson 8 is installed in the pivot.

Through the scheme of the invention, the wire harness winding 6 and the commutator 7 are hung and wound in a hook matching manner, and the wire harness winding method is as follows: 202011267050.8 the motor and its rotor are identical.

Through the scheme of the invention, the magnet 5 adopts an eccentric Y35 high-performance wet-pressed ferrite magnet, the thickness is 2.85mm, the length is 27.5mm, and the inner and outer circles are eccentric by 0.4 mm.

According to the scheme of the invention, the cup cover 22 is arranged on the outer side of the ball cup type 10 of the end cover shell 3, the carbon brush 23 and the electric brush assembly 20 are arranged on the outer side of the cup cover 22 of the end cover shell 3, and the carbon brush 23 is made of a material with low copper content and high resistivity.

According to the scheme of the invention, the shock absorbing rubber 24 is arranged on one side of the carbon brush 23 to increase the shock absorbing effect.

Specifically, rotor chip 2 inslot, terminal surface and excircle have insulating powder layer to promote the insulating withstand voltage ability of motor through the spraying technology spraying, and the commutator adopts the big commutator of external diameter phi 7.0mm, can reduce the electric spark that the armature switching-over produced greatly, improves the life-span of motor, and the rotor wire winding adopts newly-designed wire winding mode, sees the patent in detail: 202011267050.8 motor and its rotor, effectively solving the problem of crossing of the enameled wire at the hook of the permanent magnet DC motor commutator, avoiding the phenomena of broken enameled wire insulation layer and motor short circuit failure caused by high speed friction between crossed enameled wires caused by motor vibration, the winding method has neat arrangement of the enameled wires at the commutator neck, clinging to the bakelite cylinder of the commutator, greatly reducing the suspension probability of the winding, effectively avoiding the phenomena of fatigue and wire breakage caused by the oscillation of the suspended winding in the high speed rotation process of the motor, thus ensuring the stability of the motor, the winding on the rotor is fixed by insulating paint, improving the insulation performance of the armature winding, reducing the winding temperature rise, preventing the rotor from flying, the magnet adopts Y35 high performance wet pressure ferrite magnet with eccentric structure, thickness of 2.85mm, length of 27.5mm, inner and outer circle eccentricity of 0.4mm, the output torque of the motor is greatly improved, the temperature rise of the motor is reduced, the tooth space torque of the motor can be reduced, the noise of the motor is reduced, the magnetic circuit of the motor is increased by the magnetic increasing ring, the performance of the motor is greatly improved, the small-size and large-torque output is realized, the concentricity of the motor can be adjusted by adopting a ball cup structure, the mechanical loss of the motor is reduced, the efficiency of the motor is improved, the temperature rise is reduced, and the service life of the motor is prolonged; the carbon brush is made of a material with low copper content and high resistivity, and has low noise and long service life.

Fig. 4 is a schematic view of a winding structure of a commutator hook 5 groove and a rotor chip 5 groove of a high-voltage direct-current permanent magnet motor applied to medical appliances and household products such as a tooth washing device, a hair cutter and the like, wherein the commutator hook 5 groove is arranged at the upper part, and the rotor chip 5 groove is arranged at the lower part.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-voltage direct-current permanent magnet motor applied to medical instruments and household products such as tooth washers, hair scissors and the like is characterized by at least comprising a rotor structure, a stator structure, an end cover structure and a commutator, wherein the rotor structure is installed in the stator structure and comprises a rotating shaft and a plurality of superposed and fixed rotor chips installed on the rotating shaft, the rotor chips are wound with wire harness windings, the wire harness windings are matched with a commutator hook to hang a winding, the rotor chips are of a large rotor structure, the outer diameter phi of the rotor chips is 19.3mm, 5 symmetrical grooves are formed in the rotor chips, the tooth width of the rotor chips is 2.4mm, the groove width of the rotor chips is 1.5mm, an insulating powder layer is sprayed in the grooves, the end faces and the outer circles of the rotor chips through a spraying process, the commutator is a large commutator of 7.0mm in outer diameter, insulating paint is coated on the wire harness windings, the stator structure comprises a stator shell, a magnetic ring and magnets, the magnets are divided into N poles and S poles which are symmetrically fixed on the inner wall of the stator shell respectively, the outer wall of the stator shell is fixedly sleeved with a magnetism increasing ring corresponding to the position of the magnet, the end cover structure comprises an end cover shell, a ball cup, a rivet, an electric brush assembly, a cup cover, a carbon brush and shock-absorbing glue, the end cover shell is fixed with the stator shell in a matched mode, and the ball cup assembled with the rotating shaft in a matched mode is installed on the end cover shell.

2. The high-voltage direct-current permanent magnet motor applied to medical instruments and household products such as a tooth washing device, a hair clipper and the like according to claim 1 is characterized in that: the wire harness winding and the commutator hook are matched to hang a winding mode and a patent: 202011267050.8 the motor and its rotor are identical.

3. The high-voltage direct-current permanent magnet motor applied to medical instruments and household products such as a tooth washing device, a hair clipper and the like according to claim 1 is characterized in that: the magnet adopts an eccentric Y35 high-performance wet-pressed ferrite magnet, the thickness is 2.85mm, the length is 27.5mm, and the eccentricity of an inner circle and an outer circle is 0.4 mm.

4. The high-voltage direct-current permanent magnet motor applied to medical instruments and household products such as a tooth washing device, a hair clipper and the like according to claim 1 is characterized in that: the cup cover is installed on the outer side, located in the ball cup type, of the end cover shell, a carbon brush and an electric brush assembly are arranged on the outer portion, located in the cup cover, of the end cover shell, and the carbon brush is made of materials low in copper content and high in resistivity.

5. The high-voltage direct-current permanent magnet motor applied to medical instruments and household products such as a tooth washing device, a hair clipper and the like according to claim 1 is characterized in that: and one side of the carbon brush is provided with shock absorption glue.