CN212811448U

CN212811448U - Micro motor

Info

Publication number: CN212811448U
Application number: CN202021425414.6U
Authority: CN
Inventors: 金明华
Original assignee: Zhejiang Xin Xin Gu Mstar Technology Ltd
Current assignee: Zhejiang Xin Xin Gu Mstar Technology Ltd
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2021-03-26
Anticipated expiration: 2030-07-20

Abstract

The utility model discloses a micro motor, which comprises an installation shell, a heat dissipation mechanism and a working mechanism; a rotating shaft is rotatably connected in the mounting shell; the heat dissipation mechanism comprises fan blades and graphite tubes, the graphite tubes are distributed and fixedly connected to the inner wall of the mounting shell in an annular array, the fan blades are fixedly connected to the left end of the rotating shaft, and the cross section of each graphite tube is fan-shaped; the graphite pipe among the heat dissipation mechanism can be with local heat fast transfer on whole body, carry out the heat dispersion, can produce the air current when fan blade rotates, can in time take away the heat above when the air current passes through the graphite pipe, guarantee that the heat does not gather in the installation shell, sectorial cross-section can laminate completely with curved surface, this micromotor can lead away the local heat in the motor casing fast, reduces the heat and gathers, the radiating effect is good, guarantees long-time normal use.

Description

Micro motor

Technical Field

The utility model relates to the technical field of motors, specifically a micromotor.

Background

The motor mainly functions to generate driving torque and is used as a power source of electrical appliances or various machines, a generator is represented by a letter G in a circuit and mainly functions to convert mechanical energy into electric energy, the technology of the motor is mature and various, a micro motor is one of the categories, the micro motor is called a micro motor in a whole, the micro motor refers to a motor with the diameter of less than 160mm or the rated power of less than 750mW, the micro motor converts the electric energy into the mechanical energy through the electric energy, a rotor of the micro motor generates different magnetic poles through passing of current in different directions of the rotor current to generate interaction to rotate, and after the rotor rotates to a certain angle, the change of the magnetic poles of the rotor can be changed through the reversing function of a commutator in a mode of changing the direction of the current, so that the direction of the interaction between the rotor and a stator is kept unchanged. In the use in magnetic field, also having of useful permanent magnet uses excitation coil as the magnetic field source, current micromotor is in the equipment process, because micromotor self's structure is comparatively compact, the fastener that the in-process of outside combination used is more accurate, this degree of difficulty that just leads to in micromotor outside combination process increases, the speed of installation is slow, and the inner space of micromotor is little, after upper and lower cover combination, it is not good to the utilization ratio in space, generate heat easily, still there is more asking to solve, if: the motor casing is easy to accumulate heat, has poor heat dissipation effect and is not beneficial to long-time use.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current defect, provide a micromotor, can lead away the local heat in the motor casing fast, reduce the heat and gather, the radiating effect is good, guarantees long-time normal use, can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: a micro motor comprises a mounting shell, a heat dissipation mechanism and a working mechanism;

a rotating shaft is rotatably connected in the mounting shell;

the heat dissipation mechanism comprises fan blades and graphite tubes, the graphite tubes are distributed and fixedly connected to the inner wall of the mounting shell in an annular array, the fan blades are fixedly connected to the left end of the rotating shaft, and the cross section of each graphite tube is fan-shaped; the graphite pipe among the heat dissipation mechanism can carry out the heat dispersion with local heat fast transfer on whole body, can produce the air current when fan blade rotates, can in time take away the heat above with the air current when passing through the graphite pipe, guarantees that the heat does not gather in the installation shell, and fan-shaped cross-section can laminate completely with curved surface, guarantees in time and the stability of connection of heat dissipation.

The operating mechanism contains rotor winding, excitation coil, commutator, connecting block and carbon brush, rotor winding fixed connection is in the intermediate position of pivot, excitation coil fixed connection is on the inboard surface of graphite pipe, commutator fixed connection is in the left pivot of rotor winding, the connecting block is annular array fixed connection on the inner wall that the installation shell is close to the left end, carbon brush fixed connection is on every connecting block, the tip and the commutator of carbon brush contact. The operating mechanism adopts the traditional combination mode to evenly arrange the position of carbon brush, saved the inside space of installation shell, carbon brush on the connecting block compares convenient to detach more with traditional tip mounting means simultaneously, is convenient for observe at the in-process of maintenance, saves time, promotes the result of use.

Furthermore, the installation shell further comprises an end cover, the end cover is connected to the left end of the installation shell in a matched mode, and a connecting sleeve is arranged in the middle of the end cover. The end cover protects the left side of the mounting shell, and simultaneously limits the left end of the rotating shaft, so that the rotor winding is prevented from deviating during rotation.

Further, still include back filter screen and preceding filter screen, back filter screen fixed connection is on the adapter sleeve of end cover inboard, preceding filter screen fixed connection is on the surface of installation shell tip outside. The mode of back filter screen fixed connection on the end cover is convenient for install, changes more easily when the maintenance simultaneously, and the mode on the installation shell outside surface is installed additional to preceding filter screen, and the installation of being convenient for is better for built-in separation net practicality.

Furthermore, the ventilation device also comprises ventilation grooves which are distributed in an annular array shape and are respectively communicated with the planes of the end parts of the end cover and the mounting shell. The mode that the end cover and the installation shell tip are separately seted up in the ventilation groove can drive no matter corotation or reversal at rotor winding, can all make outside air current get into in the installation shell, all can play better cooling effect, and processing is comparatively rapid, low in production cost.

Furthermore, the bearing also comprises a bearing, and the inner ring of the bearing is respectively and fixedly connected to the outer surface of the contact position of the rotating shaft and the end cover as well as the outer surface of the contact position of the rotating shaft and the mounting shell. The bearing is arranged at the contact position of the rotating shaft and the end cover with the mounting shell, so that the friction resistance can be reduced, and the service life is prolonged.

The carbon brush is characterized by further comprising a junction box, wherein the junction box is fixedly connected to the surface of one side of the installation shell, the input end of the junction box is electrically connected with the output end of an external power supply, and the output end of the junction box is electrically connected with the respective input ends of the excitation coil and the carbon brush respectively. The output end of the junction box is communicated with the carbon brush, and the fuse is arranged in the junction box, so that the phenomenon that an internal coil is burnt due to unstable voltage can be reduced, wiring is facilitated, and the requirement of an actual place is met.

Further, the excitation coil can be replaced by a permanent magnet according to the requirement. The excitation coil can provide a larger magnetic field, power is promoted, and when the larger power is not needed, the permanent magnet can be adopted for replacement, so that the cost is reduced.

Compared with the prior art, the beneficial effects of the utility model are that: the micromotor has the following advantages:

1. this micromotor, the internally mounted of installation shell has the heat conduction body of graphite material, can carry out the quick dispersion with the heat that produces on the excitation coil, simultaneously under the rotation of fan blade, blows off the heat fast, reduces the heat in the installation shell and gathers.

2. According to the micro motor, the hollow graphite heat dissipation structure is beneficial for smooth passing of air flow generated by the fan blades, and the ventilation grooves are formed, so that the condition that gas can flow through the graphite pipe from different directions in the process of forward rotation or reverse rotation of the rotating shaft can be met.

3. This micromotor adds at both ends and is equipped with back filter screen and preceding filter screen, can filter the air that gets into the motor, avoids the foreign matter to inhale, and the mounting means dismouting of being convenient for makes things convenient for daily dust removal, and is higher to the space utilization in the installation shell, but has prolonged the time of single continuous operation.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a right side schematic view of the present invention.

In the figure: the device comprises an installation shell 1, a rotating shaft 2, a heat dissipation mechanism 3, fan blades 31, a graphite tube 32, a working mechanism 4, a rotor winding 41, a magnet exciting coil 42, a commutator 43, a connecting block 44, a carbon brush 45, an end cover 5, a rear filter screen 6, a front filter screen 7, a ventilation groove 8, a bearing 9 and a junction box 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a micromotor comprises a mounting shell 1, a heat dissipation mechanism 3 and a working mechanism 4;

a rotating shaft 2 is rotatably connected in the mounting shell 1;

the heat dissipation mechanism 3 comprises fan blades 31 and graphite tubes 32, the graphite tubes 32 are distributed and fixedly connected to the inner wall of the mounting shell 1 in an annular array, the fan blades 31 are fixedly connected to the left end of the rotating shaft 2, and the cross sections of the graphite tubes 32 are fan-shaped; graphite pipe 32 among the heat dissipation mechanism 3 can be with local heat fast transfer on whole body, carries out the heat dispersion, can produce the air current when fan blade 31 rotates, can in time take away the heat above when the air current passes through graphite pipe 32, guarantees that the heat does not gather in installation shell 1, and sectorial cross-section can laminate completely with curved surface, guarantees in time and the stability of connecting of dispelling the heat.

The working mechanism 4 comprises a rotor winding 41, an excitation coil 42, a commutator 43, connecting blocks 44 and carbon brushes 45, wherein the rotor winding 41 is fixedly connected to the middle position of the rotating shaft 2, the excitation coil 42 is fixedly connected to the surface of the inner side of the graphite pipe 32, the commutator 43 is fixedly connected to the rotating shaft 2 on the left side of the rotor winding 41, the connecting blocks 44 are fixedly connected to the inner wall, close to the left end, of the installation shell 1 in an annular array mode, the carbon brushes 45 are fixedly connected to each connecting block 44, and the end portions of the carbon brushes 45 are in contact with the commutator 43. Operating device 4 adopts traditional compound mode to evenly arrange the position of carbon brush 45, saved the inside space of installation shell 1, carbon brush 45 on the connecting block 44 compares convenient to detach more with traditional tip mounting means simultaneously, is convenient for observe at the in-process of maintenance, saves time, promotes the result of use. The mounting structure further comprises an end cover 5, the end cover 5 is connected to the left end of the mounting shell 1 in a matched mode, and a connecting sleeve is arranged in the middle of the end cover 5. The end cap 5 protects the left side of the mounting case 1 while limiting the left end of the rotating shaft 2 to ensure that the rotor winding 41 does not shift during rotation. The mounting structure further comprises a rear filter screen 6 and a front filter screen 7, wherein the rear filter screen 6 is fixedly connected to the connecting sleeve on the inner side of the end cover 5, and the front filter screen 7 is fixedly connected to the surface of the outer side of the end part of the mounting shell 1. The mode that back filter screen 6 fixed connection is on end cover 5, the installation of being convenient for, change more easily when the maintenance simultaneously, preceding filter screen 7 installs mode on the surface in the installation shell 1 outside additional, the installation of being convenient for, and is better for built-in separation net practicality. Still including 8 ventilation grooves 8 and be annular array form distribution, and this ventilation grooves 8 link up respectively and set up on the plane of end cover 5 and the respective tip of installation shell 1. The mode that ventilation groove 8 was seted up at end cover 5 and the respective tip of installation shell 1 can drive no matter corotation or reversal at rotor winding 41 in pivot 2, can all make outside air current get into in the installation shell 1, all can play better cooling effect, and processing is comparatively rapid, low in production cost. The bearing device further comprises a bearing 9, and an inner ring of the bearing 9 is fixedly connected to the outer surface of the contact position of the rotating shaft 2, the end cover 5 and the mounting shell 1 respectively. The friction resistance can be reduced and the service life can be prolonged by installing the bearing 9 at the contact position of the rotating shaft 2, the end cover 5 and the installation shell 1. The magnetic brush type LED lamp further comprises a junction box 10, the junction box 10 is fixedly connected to the surface of one side of the mounting shell 1, the input end of the junction box 10 is electrically connected with the output end of an external power supply, and the output end of the junction box 10 is electrically connected with the respective input ends of the excitation coil 42 and the carbon brush 45. The output end of the junction box 10 is communicated with the carbon brush 45, and the fuse is arranged in the junction box 10, so that the phenomenon that an internal coil is burnt out due to unstable voltage can be reduced, wiring is facilitated, and the requirements of actual places are met. The field coil 42 may be replaced with a permanent magnet as needed. The magnet exciting coil 42 can provide a larger magnetic field, which is beneficial to power increase, and when larger power is not needed, the permanent magnet can be adopted for replacement, so that the cost is reduced.

When in use:

graphite pipe 32 among the heat dissipation mechanism 3 can be with local heat fast transfer on whole body, carries out the heat dispersion, can produce the air current when fan blade 31 rotates, can in time take away the heat above when the air current passes through graphite pipe 32, guarantees that the heat does not gather in installation shell 1. Operating device 4 adopts traditional compound mode to evenly arrange the position of carbon brush 45, saved the inside space of installation shell 1, carbon brush 45 on the connecting block 44 compares convenient to detach more with traditional tip mounting means simultaneously, is convenient for observe at the in-process of maintenance, saves time, promotes the result of use. The end cap 5 protects the left side of the mounting case 1 while limiting the left end of the rotating shaft 2 to ensure that the rotor winding 41 does not shift during rotation. The mode that back filter screen 6 fixed connection is on end cover 5, the installation of being convenient for, change more easily when the maintenance simultaneously, preceding filter screen 7 installs mode on the surface in the installation shell 1 outside additional, the installation of being convenient for, and is better for built-in separation net practicality. The mode that ventilation groove 8 was seted up at end cover 5 and the respective tip of installation shell 1 can drive no matter corotation or reversal at rotor winding 41 in pivot 2, can all make outside air current get into in the installation shell 1, all can play better cooling effect, and processing is comparatively rapid, low in production cost. The friction resistance can be reduced and the service life can be prolonged by installing the bearing 9 at the contact position of the rotating shaft 2, the end cover 5 and the installation shell 1. The output end of the junction box 10 is communicated with the carbon brush 45, and the fuse is arranged in the junction box 10, so that the phenomenon that an internal coil is burnt out due to unstable voltage can be reduced, wiring is facilitated, and the requirements of actual places are met. The magnet exciting coil 42 can provide a larger magnetic field, which is beneficial to power increase, and when larger power is not needed, the permanent magnet can be adopted for replacement, so that the cost is reduced.

It should be noted that the rotor winding 41, the exciting coil 42 and the commutator 43 disclosed in the present embodiment can be freely configured according to the actual application, and the connection manner between the terminal box 10 and the exciting coil 42 and the commutator 43 and the connection manner between the commutator 43 and the rotor winding 41 adopt the methods commonly used in the prior art.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a micromotor, includes installation shell (1), heat dissipation mechanism (3) and operating device (4), its characterized in that: a rotating shaft (2) is rotatably connected in the mounting shell (1); the heat dissipation mechanism (3) comprises fan blades (31) and graphite tubes (32), the graphite tubes (32) are distributed and fixedly connected to the inner wall of the mounting shell (1) in an annular array, the fan blades (31) are fixedly connected to the left end of the rotating shaft (2), and the cross sections of the graphite tubes (32) are fan-shaped;

operating device (4) contain rotor winding (41), excitation coil (42), commutator (43), connecting block (44) and carbon brush (45), rotor winding (41) fixed connection is in the intermediate position of pivot (2), excitation coil (42) fixed connection is on the inboard surface of graphite pipe (32), commutator (43) fixed connection is on rotor winding (41) left pivot (2), connecting block (44) are annular array fixed connection on installation shell (1) is close to the inner wall of left end, carbon brush (45) fixed connection is on every connecting block (44), the tip and the commutator (43) of carbon brush (45) contact.

2. The micro-machine of claim 1, wherein: the mounting structure is characterized by further comprising an end cover (5), wherein the end cover (5) is connected to the left end of the mounting shell (1) in a matched mode, and a connecting sleeve is arranged in the middle of the end cover (5).

3. The micro-machine of claim 1, wherein: still include back filter screen (6) and preceding filter screen (7), back filter screen (6) fixed connection is on the adapter sleeve of end cover (5) inboard, preceding filter screen (7) fixed connection is on the surface in installation shell (1) tip outside.

4. The micro-machine of claim 1, wherein: still include ventilation groove (8) are the distribution of annular array form, and this ventilation groove (8) link up respectively and set up on the plane of end cover (5) and installation shell (1) tip separately.

5. The micro-machine of claim 1, wherein: the bearing device is characterized by further comprising a bearing (9), wherein an inner ring of the bearing (9) is fixedly connected to the outer surface of the contact position of the rotating shaft (2) and the end cover (5) and the outer surface of the contact position of the mounting shell (1) respectively.

6. The micro-machine of claim 1, wherein: the LED lamp is characterized by further comprising a junction box (10), wherein the junction box (10) is fixedly connected to the surface of one side of the mounting shell (1), the input end of the junction box (10) is electrically connected with the output end of an external power supply, and the output end of the junction box (10) is electrically connected with the input ends of the excitation coil (42) and the carbon brush (45) respectively.