CN210201682U - Miniature direct current motor with self-positioning function - Google Patents

Abstract

The utility model discloses a miniature DC motor with from locate function, including end cover subassembly, stator module, rotor subassembly and locating component, the end cover subassembly with the riveting of stator module, the inside rotor subassembly that is provided with of stator module, stator module keeps away from one side of end cover subassembly with locating component fixed connection, the pivot of rotor subassembly is run through end cover subassembly, stator module and locating component, locating component includes fixing base, interior magnetic ring and outer magnetic ring, the one end of fixing base with stator module fixed connection, the inside of fixing base with the riveting of outer magnetic ring, the inside of outer magnetic ring with interior magnetic ring looks butt, the inside of interior magnetic ring with pivot fixed connection. The utility model discloses have and to fix a position the pivot at the motor stop work back, magnetic force between interior magnetic ring and the outer magnetic ring, avoid pivot pivoted effect.

Description

Miniature direct current motor with self-positioning function

Technical Field

The utility model belongs to the technical field of direct current motor's technique and specifically relates to a miniature direct current motor with from positioning function is related to.

Background

The micro direct current motor is a rotating motor which outputs or inputs direct current energy, and is widely used in places with limited installation space; in addition, the micro direct current motor can automatically reduce the speed according to the size of the load, so that the extremely large starting torque is achieved.

In the in-process of in-service use, in some equipment that need miniature DC motor's output at devices such as automatic curtain, automatic (window) curtain hang in the air, after miniature DC motor outage, its inside rotor subassembly stall, after inside magnetic field disappears, under the effect of gravity, devices such as curtain and (window) curtain can slide downwards, and among the prior art, generally all avoid devices such as curtain and (window) curtain to slide downwards through installing extra reduction gear, and occupation space is great.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a miniature direct current motor, it has the effect from the locate function after the motor outage.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a miniature direct current motor with from locate function, includes end cover subassembly, stator module, rotor subassembly and locating component, the end cover subassembly with stator module riveting, the inside rotor subassembly that is provided with of stator module, one side that stator module kept away from the end cover subassembly with locating component fixed connection, the pivot of rotor subassembly runs through end cover subassembly, stator module and locating component, locating component includes fixing base, interior magnetic ring and outer magnetic ring, the one end of fixing base with stator module fixed connection, the inside of fixing base with outer magnetic ring riveting, the inside of outer magnetic ring with interior magnetic ring looks butt, the inside of interior magnetic ring with pivot fixed connection.

Through adopting above-mentioned technical scheme, the magnetic force between interior magnetic ring and the outer magnetic ring plays the fixed action to the pivot after the motor outage, avoids the pivot to rotate under the drive of other devices, improves the positioning torque of motor self, guarantees the stability of equipment to need not to install reduction gear, save space, the fixing base has improved the stability of motor installation.

Furthermore, a bushing is further arranged between the rotating shaft and the inner magnetic ring, the inner wall of the bushing is fixedly connected with the rotating shaft, and the outer wall of the bushing is fixedly connected with the inner magnetic ring.

Through adopting above-mentioned technical scheme, but the bush improves the stability of being connected between pivot and the interior magnetic ring.

Further, the surface of the lining is also coated with electronic glue.

Through adopting above-mentioned technical scheme, electron glue further improves the stability between bush and pivot and the interior magnetic ring.

Furthermore, a plurality of arc-shaped grooves are uniformly formed in the outer wall of the outer magnetic ring along the circumferential direction, and a plurality of fixing lugs matched with the arc-shaped grooves are uniformly distributed on the inner wall of the fixing seat along the circumferential direction.

Through adopting above-mentioned technical scheme, circular-arc recess cooperatees with fixed lug, is convenient for fix the inside at the fixing base with outer magnetic ring, improves the stability of being connected between outer magnetic ring and the fixing base, avoids outer magnetic ring to drop from the fixing base.

Furthermore, three heat dissipation holes which are uniformly distributed are formed in one side, facing the stator assembly, of the fixing seat.

Through adopting above-mentioned technical scheme, the louvre can be in time with the heat discharge that the motor produced at work, avoids the heat to pile up and leads to the motor overheated, leads to equipment damage, has improved the life of equipment.

Furthermore, the outer wall of the fixing seat is provided with a mounting buckle which is arranged oppositely.

Through adopting above-mentioned technical scheme, the installation buckle has further improved the stability of fixing base with the external equipment installation.

Furthermore, a plurality of anti-skidding lines are uniformly distributed on the outer wall of the fixing seat along the circumferential direction.

Through adopting above-mentioned technical scheme, the non-slip line on fixing base surface has further improved the frictional force between fixing base and the external equipment, further improves the stability of fixing base installation.

Furthermore, the outer wall of the stator assembly is fixedly connected with a magnetic protection ring.

By adopting the technical scheme, the magnetic leakage phenomenon of the motor can be effectively relieved by the magnetic protection ring, and the working efficiency of the motor is improved.

To sum up, the beneficial effects of the utility model are that:

1. the technology of the positioning assembly with the inner magnetic ring and the outer magnetic ring is adopted, so that the magnetic force between the inner magnetic ring and the outer magnetic ring can position the rotating shaft after the motor stops working, and the rotating effect of the rotating shaft is avoided;

2. the technology of the bushing with the surface coated with the electronic glue is adopted, so that the effect of improving the stability of the connection between the inner magnetic ring and the rotating shaft can be improved;

3. the technology of showing the fixing seat with the installation buckle and the anti-skidding lines is adopted, so that the effect of the stability of installation of the positioning assembly can be improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present embodiment.

Fig. 2 is a schematic sectional view in the direction of a-a in fig. 1.

Fig. 3 is a top view of the positioning assembly of the present embodiment.

In the figure, 1, an end cover assembly; 11. a rubber cover; 12. a terminal; 13. a carbon brush; 2. a stator assembly; 21. protecting a magnetic ring; 22. a housing; 23. a magnetic shoe; 3. a rotor assembly; 31. a rotating shaft; 32. a coil; 33. a commutator; 4. a positioning assembly; 41. a fixed seat; 411. mounting a buckle; 412. fixing the bump; 413. heat dissipation holes; 414. anti-skid lines; 42. an inner magnetic ring; 43. an outer magnetic ring; 431. a circular arc-shaped groove; 44. a bushing; 5. and fastening the bolt.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1: referring to fig. 1, the micro dc motor disclosed in this embodiment includes an end cover assembly 1, a stator assembly 2, a rotor assembly 3 (see fig. 2), and a positioning assembly 4. Stator module 2's inside is rotor subassembly 3, stator module 2's open-ended one end fixedly connected with end cover subassembly 1, stator module 2's other end fixedly connected with locating component 4.

Referring to fig. 2, the stator assembly 2 includes a housing 22, magnetic shoes 23 and reeds (not shown), the magnetic shoes 23 which are oppositely arranged are fixed on the inner wall of the housing 22 which is in a cylindrical structure with an opening at one end and a hollow interior, the reeds are arranged on both sides of the magnetic shoes 23, the reeds prevent the magnetic shoes 23 from moving, and the stability of the magnetic shoes 23 is improved; the outside of casing 22 still rivets and has protected magnetic ring 21, protects magnetic ring 21 and can reduce the appearance of the phenomenon of motor magnetic leakage effectively, improves the stability of motor work.

The rotor assembly 3 includes a rotating shaft 31, coils 32, and a commutator 33. The rotating shaft 31 is located on the central axis of the stator assembly 2 and penetrates through the end cover assemblies 1 and the positioning assemblies 4 on two sides of the stator assembly 2, the rotating shaft 31 is wound with a coil 32 on the surface of the inside of the stator assembly 2, and a commutator 33 is fixedly connected to one side, close to the end cover assembly 1, of the coil 32.

The end cover assembly 1 comprises a rubber cover 11, terminals 12 and a carbon brush 13, the rubber cover 11 is fixedly connected with an opening part of the shell 22, the surface of one side, away from the shell 22, of the rubber cover 11 is fixedly connected with the two terminals 12, one end of each terminal 12 penetrates through the bottom end of the rubber cover 11, one end of each terminal 12 penetrates through the carbon brush 13 fixedly connected with the bottom end of the rubber cover 11, and one end, away from the terminal 12, of the carbon brush 13 is abutted to the rotating shaft 31.

The positive and negative poles of the external power supply are electrically connected with the terminals 12 respectively, the current generates ampere force through the carbon brush 13 to the coil 32 on the rotor assembly 3, when the magnetic field generated by the coil 32 and the magnetic shoe 23 is parallel, the direction of the magnetic field continuously received is changed, so that the carbon brush 13 is in alternate contact with the commutator 33 at the moment, the direction of the current on the coil 32 is also changed, the direction of the generated Lorentz force is unchanged, the rotating shaft 31 can keep rotating in one direction, and the electric energy is converted into mechanical energy.

Referring to fig. 1 and 3, the positioning assembly 4 includes a fixing base 41, an inner magnetic ring 42, an outer magnetic ring 43, and a bushing 44. The fixing base 41 is cylindrical, and one end of the fixing base 41 close to the housing 22 is fixedly connected with the housing 22 through two fastening bolts 5. The fixing seat 41 is further provided with three heat dissipation holes 413 at one end close to the casing 22, and the heat dissipation holes 413 can effectively discharge heat generated by the motor during operation outwards, so that the service life of the motor is prolonged. The middle of one end of the fixed seat 41 close to the housing 22 is further provided with a through hole for the rotating shaft 31 to pass through. A pair of oppositely arranged mounting buckles 411 are arranged on the outer wall of the fixing seat 41, a plurality of anti-slip grains 414 are further arranged around the mounting buckles 411, and the stability of connection between the fixing seat 41 and external equipment is improved through the matching of the mounting buckles 411 and the anti-slip grains 414.

The outer magnetic ring 43 is abutted to the inside of the fixed seat 41, four fixing lugs 412 are uniformly arranged in the fixed seat 41 along the circumferential direction, four arc-shaped grooves 431 are uniformly arranged on the outer wall of the outer magnetic ring 43 along the circumferential direction, the outer diameter of each fixing lug 412 is the same as the inner diameter of each arc-shaped groove 431, and the outer magnetic ring 43 is fixedly connected with the fixing lugs 412 on the inner wall of the fixed seat 41 through the arc-shaped grooves 431 on the outer wall, so that the connection stability is improved. The inside and interior magnetosphere 42 fixed connection of outer magnetosphere 43, the surface of interior magnetosphere 42 is provided with a plurality of arch, and interior magnetosphere 42 is connected with outer magnetosphere 43 magnetism, and the inside of interior magnetosphere 42 passes through electron glue and bush 44 fixed connection, and the inside of bush 44 passes through electron glue and pivot 31 fixed connection, and bush 44 has improved the stability of being connected between pivot 31 and the interior magnetosphere 42, and electron glue adopts the PUR hot melt adhesive.

The specific implementation process comprises the following steps:

after the motor stops working, the magnetic force between the inner magnetic ring 42 and the outer magnetic ring 43 forms a torque for positioning, so that the rotating shaft 31 is prevented from rotating back and forth under the action of gravity, and the stability of the equipment is improved.

The device need not additionally to install reduction gear at the output of pivot 31, and the structure is compacter, and occupation space is littleer, installation convenient to use.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims (8)

1. The utility model provides a miniature direct current motor with from locate function, includes end cover subassembly (1), stator module (2), rotor subassembly (3) and locating component (4), end cover subassembly (1) with stator module (2) riveting, stator module (2) inside is provided with rotor subassembly (3), stator module (2) are kept away from one side of end cover subassembly (1) with locating component (4) fixed connection, pivot (31) of rotor subassembly (3) run through end cover subassembly (1), stator module (2) and locating component (4), its characterized in that: the positioning assembly (4) comprises a fixed seat (41), an inner magnetic ring (42) and an outer magnetic ring (43), one end of the fixed seat (41) is fixedly connected with the stator assembly (2), the inside of the fixed seat (41) is riveted with the outer magnetic ring (43), the inside of the outer magnetic ring (43) is abutted to the inner magnetic ring (42), and the inside of the inner magnetic ring (42) is fixedly connected with the rotating shaft (31).

2. The miniature direct current motor with self-positioning function according to claim 1, wherein: the rotating shaft (31) and the inner magnetic ring (42) are further provided with a bushing (44), the inner wall of the bushing (44) is fixedly connected with the rotating shaft (31), and the outer wall of the bushing (44) is fixedly connected with the inner magnetic ring (42).

3. The miniature direct current motor with self-positioning function according to claim 2, wherein: the surface of the bushing (44) is also coated with electronic glue.

4. The miniature direct current motor with self-positioning function according to claim 1, wherein: the outer wall of the outer magnetic ring (43) is uniformly provided with a plurality of arc-shaped grooves (431) along the circumferential direction, and the inner wall of the fixed seat (41) is uniformly distributed with a plurality of fixing lugs (412) matched with the arc-shaped grooves (431) along the circumferential direction.

5. The miniature direct current motor with self-positioning function according to claim 1, wherein: and one side of the fixed seat (41) facing the stator assembly (2) is provided with three heat dissipation holes (413) which are uniformly distributed.

6. The miniature direct current motor with self-positioning function according to claim 1, wherein: the outer wall of the fixed seat (41) is provided with a mounting buckle (411) which is arranged oppositely.

7. The miniature direct current motor with self-positioning function according to claim 1, wherein: the outer wall of the fixed seat (41) is uniformly distributed with a plurality of anti-slip lines (414) along the circumferential direction.

8. The miniature direct current motor with self-positioning function according to claim 1, wherein: the outer wall of the stator assembly (2) is also fixedly connected with a magnetic protection ring (21).

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