CN212486268U

CN212486268U - Self-positioning fastening type inner rotor motor

Info

Publication number: CN212486268U
Application number: CN202021586094.2U
Authority: CN
Inventors: 郭忠明; 何晓丽; 朱红旗
Original assignee: Nichibo Motor Shenzhen Co ltd
Current assignee: Nichibo Motor Shenzhen Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-02-05
Anticipated expiration: 2030-07-31

Abstract

The utility model discloses a self-align fastening type inner rotor motor, include: the rotor comprises a shell, a rotor shaft, a front end bearing sleeved on the rotor shaft and a bearing bush arranged between the front end bearing and the shell; the front end bearing is slidably mounted in the bearing bush and is fixed between the front retaining wall and the rear retaining wall on the bearing bush. The bearing bush with be provided with fixed glue film between the shell, the bearing bush passes through fixed glue film is fixed the front end of shell. The utility model fixes the front end bearing through the front and back retaining walls of the bearing bush, and avoids the axial movement of the rotor shaft; through filling fixed glue film between bearing bush and shell, avoid the radial play that the rotor shaft produced. The utility model provides a from firm rotor shaft of positioning fastening type inner rotor motor in the shell has eliminated radial and the ascending clearance of axial between rotor shaft and the shell, prevents that the rotor shaft from moving, and then reduces the friction loss between the part, increases the stability of motor work.

Description

Self-positioning fastening type inner rotor motor

Technical Field

The utility model relates to an inner rotor motor technical field especially relates to a self-align fastening type inner rotor motor.

Background

The inner rotor motor is characterized in that a shell is fixedly arranged outside, a stator is arranged in the shell, a rotor shaft supplies current through a commutator, the rotor shaft is arranged in the stator and rotates relative to the shell to realize output outside, and the rotor shaft is connected with the shell through a bearing.

In the prior art, a radial adaptation tolerance zone is adopted between the bearing position of the bearing and the bearing position of the shell for adaptation, the axial direction is riveted and fixed through an end cover plate, a gap exists between the bearing and the bearing position of the shell, the motor works for a long time, the phenomenon that the rotor shaft drives the bearing to generate axial movement or radial movement in the shell can occur, the abrasion loss between the rotor shaft and the commutator is increased, the abrasion of the bearing in the bearing position of the shell is also increased, and the service life of the motor is shortened.

SUMMERY OF THE UTILITY MODEL

In order to solve and to have the gap between bearing position and the bearing among the prior art, rotor shaft work easily produces the problem of moving, the utility model provides a self-align fastening type inner rotor motor.

The utility model discloses a following technical scheme realizes:

a self-positioning fastening type inner rotor motor comprising: a housing and a rotor shaft mounted in the housing, further comprising: the front end bearing is sleeved on the rotor shaft, and the bearing bush is arranged between the front end bearing and the shell;

the front end bearing is slidably mounted in the bearing bush, the bearing bush comprises a front retaining wall and a rear retaining wall, and the front end bearing is fixed between the front retaining wall and the rear retaining wall;

the bearing bush with be provided with fixed glue film between the shell, the bearing bush passes through fixed glue film is fixed the front end of shell.

Furthermore, a front port of the bearing bush extends towards the inner side and the outer side of the bearing bush to form the front retaining wall, and the bearing bush is fixed at the front end of the shell through the front retaining wall;

the rear end opening of the bearing bush extends into the bearing bush to form the rear retaining wall, a rubber pad is arranged in the bearing bush and positioned between the rear retaining wall and the front end bearing, and the rubber pad buffers the front end bearing.

Further, the rotor shaft is interference-mounted in the front end bearing.

Further, the fixed glue layer is anaerobic glue.

Further, the self-positioning fastening type inner rotor motor includes a rotor bracket mounted on the rotor shaft, the rotor bracket including: the rotor comprises a plurality of wire racks for winding wires and wire grooves positioned between two adjacent wire racks, wherein the wire grooves are obliquely arranged relative to the rotor shaft.

Furthermore, the rotor bracket comprises a plurality of line plates arranged on the rotor shaft, the latter line plate rotates relative to the former line plate and is fixedly arranged on the former line plate in an attached mode, and the rotation angles of the adjacent line plates are equal; the wire boards are attached to form the wire grooves and the wire racks.

Further, the self-positioning fastening type inner rotor motor further includes: the commutator comprises a rubber cover arranged on the shell, a commutator arranged in the rubber cover and a wiring terminal electrically connected with the commutator;

the rubber cover closes one end of the shell; the rotor shaft is installed in the rubber cover through the commutator, and an external power supply supplies power to the commutator through the wiring terminal.

Further, the self-positioning fastening type inner rotor motor further includes: the ball cup is arranged in the rubber cover, and the cup cover is arranged in the rubber cover;

the ball cup is sleeved on the rotor shaft and is arranged between the rotor shaft and the rubber cover; the cup cover covers the ball cup.

Further, the self-positioning fastening type inner rotor motor further comprises: the inductor is electrically connected with the wiring terminal, the thermistor is electrically connected with the inductor, the capacitor is electrically connected with the thermistor, and the torsion spring is electrically connected with the commutator;

an external power supply supplies power to the commutator through the wiring terminal, the inductor, the thermistor, the capacitor and the torsion spring in sequence.

Further, the self-positioning fastening type inner rotor motor further comprises a rear shell; the rear shell is mounted on the rubber cover in a clamping manner; the wiring terminal is exposed out of the rear shell and is electrically connected with an external power supply.

The beneficial effects of the utility model reside in that:

in the self-positioning fastening type inner rotor motor disclosed by the utility model, a front end bearing arranged on a rotor shaft is arranged in a shell through a bearing bush, the front end bearing is arranged in the bearing bush in a sliding way through a sliding fit tolerance zone and is fixed between a front retaining wall and a rear retaining wall of the bearing bush, so that the front end bearing and the bearing bush are prevented from generating axial or radial movement;

the bearing bush is fixed in the shell through a fixing glue layer, the fixing glue layer realizes the stable fixation of the bearing bush in the shell, eliminates the gap at the installation position of the bearing bush and the shell and avoids the bearing bush from moving relative to the shell;

the utility model discloses a bearing bush respectively with the fixed relation of shell and front end bearing, avoid the space in shell and the rotor shaft structure, effectively fixed the position relation between rotor shaft and the shell, avoid the rotor shaft at the in-process of rotatory doing work, the rotor shaft takes place the axial for the shell or radial cluster moves, has reduced the friction loss that the rotor shaft produced because of the cluster moves with other mechanical parts, ensures from the mechanical properties of positioning fastening type inner rotor motor and the stability of electrical property, increase from the life of positioning fastening type inner rotor motor.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic perspective view of the middle bearing bush, the front end bearing and the rotor shaft according to the present invention;

FIG. 4 is a schematic perspective view of the alternate angle of FIG. 3;

FIG. 5 is an exploded view of the bearing cartridge and nose bearing portion;

fig. 6 is a schematic perspective view of the rotor shaft and the rotor support of the present invention;

fig. 7 is a schematic perspective view of the interior of the middle back shell of the present invention;

fig. 8 is an exploded view of the rear housing of the present invention.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the following description of the present invention will refer to the accompanying drawings and illustrate embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1 and 2, the present invention discloses a self-positioning fastening type inner rotor motor, including: a housing 1 and a rotor shaft 2 mounted in said housing 1, and: a front end bearing 21 fitted around the rotor shaft 2, and a bearing bush 11 installed between the front end bearing 21 and the housing 1. Referring to the installation relationship of fig. 1 and 2, the front end bearing 21 is installed on the rotor shaft 2, the bearing bush 11 is installed on the front end bearing, the bearing bush 11 is installed at the front end of the housing 1, and the installation of the rotor shaft 2 in the housing 1 is realized.

The front end bearing 21 is slidably mounted in the bearing bush 11, a fixing glue layer (not shown) is disposed between the bearing bush 11 and the housing 1, and the bearing bush 11 is fixed in the housing 1 by the fixing glue layer.

The front end bearing 21 is installed in the bearing bush 11 in a sliding manner, and an outer ring of the front end bearing 21 is adapted to the inner diameter of the bearing bush 11 by adopting a sliding fit tolerance zone. Referring to fig. 3 to 5, the bearing bush 11 is provided with a rear blocking wall 112 at a rear port, and the front end bearing 21 slides into the bearing bush 11 from a front port; when the front end bearing 21 abuts against the rear blocking wall 112, the front end bearing 21 completes the positioning in the bearing bush 11; after the front end bearing 21 is positioned, embossing is performed on the front end opening of the bearing bush 11, so that the front end opening extends towards the inner and outer sides of the bearing bush 11 to form a front blocking wall 111, at this time, the front blocking wall 111 abuts against the front end of the front end bearing 21, and the rear blocking wall 112 abuts against the rear end of the front end bearing 21, thereby realizing the fixation of the front end bearing 21 in the bearing bush 11.

In a preferred embodiment of the present invention, a rubber pad 110 is disposed in the bearing bush 11, the rubber pad 110 is used for buffering the front end bearing 21 and eliminating the axial gap between the front end bearing 21 and the bearing bush 11, which plays a role of stabilizing the rotor shaft 2, so as to prevent the rotor shaft 2 from generating axial movement when acting on external output.

Front end bearing 21 with after 11 installations of bearing bush, will 11 installs bearing bush are in the front end of shell 1, and shell 1 with fill the glue solution between 11 of bearing bush, after the glue solution is cured bearing bush 11 with form the fixed glue film between 1 of shell, guarantee the inseparable installation between 1 of shell and the bearing bush 11, eliminate between 1 of shell and the bearing bush 11, be located the radial ascending gap of rotor shaft 2, avoid rotor shaft 2 is in the radial play that produces in the course of the work, guarantees the stability of work when 2 external outputs of rotor shaft.

In the above embodiment, the front retaining wall 111 and the rear retaining wall 112 of the bearing bush 11 of the present invention fix the front end bearing 21, so as to prevent the axial movement of the rotor shaft 2; by filling a fixing glue layer between the bearing bush 11 and the housing 1, radial play of the rotor shaft 2 is avoided. The utility model provides a from positioning fastening type inner rotor motor plays the effect of stabilizing rotor shaft 2 in shell 1 through the mounting structure relation between "2 front end bearings of rotor shaft 21-11 shells of bearing bush 1", has eliminated radial and the ascending clearance of axial between rotor shaft 2 and the shell 1 prevents that rotor shaft 2 from producing the cluster when external acting from moving, and then has reduced the friction loss that causes because of the cluster between the part, has increased from positioning fastening type inner rotor motor job stabilization nature has prolonged from positioning fastening type inner rotor motor's life.

In the above-mentioned embodiment, and with reference to fig. 3 and 4, the front blocking wall 111 and the rear blocking wall 112 of the bearing bush 11 both extend from the side wall of the bearing bush 11, wherein the rear blocking wall 112 only extends towards the inside of the bearing bush 11 for positioning the front end bearing 21; the front blocking wall 111 extends towards both the inner and outer sides of the bearing cartridge 11 for positioning the front end bearing 21 and for positioning the bearing cartridge 11 on the housing 1.

In a preferred embodiment of the present invention, in order to avoid the rotor shaft 2 from moving axially or radially relative to the front end bearing 21, the rotor shaft 2 is interference-mounted in the front end bearing 21.

The front end bearing 21 and the rotor shaft 2 are installed in an interference manner, so that the holding force between the front end bearing 21 and the rotor shaft 2 reaches 20kgf, the structural stability between the front end bearing 21 and the rotor shaft 2 is ensured, the axial or radial friction between the rotor shaft 2 and the front end bearing 21 is avoided, and the stability of the rotor shaft 2 during operation is ensured.

In the above embodiment, the fixing glue layer is anaerobic glue. The anaerobic adhesive is characterized in that the anaerobic adhesive can not be coagulated and solidified when contacting with air or oxygen; the anaerobic adhesive is condensed when the air is isolated, and the volume of the anaerobic adhesive is not changed after the anaerobic adhesive is condensed, so that the volume of the fixed adhesive layer is prevented from being reduced after the anaerobic adhesive is condensed, and a gap is formed between the bearing bush 11 and the shell 1. After the anaerobic adhesive is poured, the condensed fixed adhesive layer can also isolate the shell 1 and the bearing bush 11 from contacting with air, so that the shell 1 and the bearing bush 11 are prevented from being rusted by the air. Meanwhile, the anaerobic adhesive overflowing from the shell 1 and the bearing bush 11 after being poured can be directly wiped and removed due to the fact that the anaerobic adhesive is not solidified when contacting air, and the anaerobic adhesive is simple to process and easy to operate.

Referring to fig. 4 and 5, in an embodiment of the present invention, a thrust bearing 23 is further disposed on the rotor shaft 2, the thrust bearing 23 is abutted against the rear end of the front end bearing 21, the thrust bearing 23 is used for bearing an axial load of the rotor shaft 2, so as to reduce an influence of the rotor shaft 2 on the front end bearing 21 in the axial direction, and avoid a problem that the front end bearing 21 is unstable in operation due to the influence of the axial load of the rotor shaft 2 on the front end bearing 21.

Referring to fig. 6, the self-positioning fastening type inner rotor motor includes a rotor bracket 22 mounted on the rotor shaft 2, the rotor bracket 22 including: a plurality of bobbins 222 for winding electric wires and a wire slot 221 between two adjacent bobbins 222, the wire slot 221 being disposed obliquely with respect to the rotor.

In this embodiment, the wire passes through the wire slot 221 and is wound on the wire frame 222, and the rotor shaft 2 is driven to rotate in the magnetic field by the current in the wire with changing direction.

In the prior art, the wire slots 221 are mostly straight lines, and the plurality of wire slots 221 are all parallel to the rotor shaft 2. In this embodiment, the wire casing 221 is a spiral wire, and in the projection of the housing 1, the wire casing 221 forms an inclined angle with respect to the rotor shaft 2, and the inclined wire casing 221 can weaken the harmonic electromotive force in the self-positioning fastening inner rotor motor, thereby reducing the additional torque of the harmonic magnetic field caused by the harmonic electromotive force, and reducing the electromagnetic vibration and the working noise.

Specifically, the structure of the rotor support 22 is composed of a plurality of line plates 220 mounted on the rotor shaft 2, the latter line plate 220 rotates relative to the former line plate 220 and is fixedly mounted on the former line plate 220 in an abutting manner, and the rotation angles of the adjacent line plates 220 are equal. The wire slots 221 and the wire holders 222 are formed by attaching a plurality of the wire plates 220, so that the wire slots 221 are formed in a spiral shape.

In the above embodiment, the rotor shaft 2 and the rotor shaft 2 are mounted on the rotor holder 22 and are both disposed in the housing 1, the housing 1 is further fixed with a stator 12 for providing a magnetic field, the stator 12 is fixed to the inner wall of the housing 1 by bonding, caulking or engaging, the rotor shaft 2 and the rotor holder 22 are located in the magnetic field formed by the stator 12, and when the coil on the rotor holder 22 is energized, the rotor shaft 2 is rotated by the magnetic effect of the current.

Referring to fig. 7 and 8, the self-positioning fastening type inner rotor motor further includes: the rubber cover 3 is mounted on the shell 1, the commutator 31 is mounted in the rubber cover 3, and the connecting terminal 32 is electrically connected with the commutator 31. The rubber cover 3 closes one end of the shell 1; the rotor shaft 2 is arranged in the rubber cover 3 through the commutator 31, and an external power supply supplies power to the commutator 31 through the wiring terminal 32.

In this embodiment, the commutator 31 is electrically connected to the coil wound on the rotor support 22, and the commutator 31 continuously changes the direction of the current in the coil, so that the rotor support 22 drives the rotor shaft 2 to rotate in the magnetic field under the influence of the magnetic effect of the current to apply work to the outside. An external circuit supplies current to the commutator 31 through the connecting terminal 32.

The self-positioning fastening type inner rotor motor further includes: a ball cup 33 mounted in the rubber cover 3, and a cup cover 330 mounted in the rubber cover 3. The ball cup 33 is sleeved on the rotor shaft 2, and the ball cup 33 is arranged between the rotor shaft 2 and the rubber cover 3; the cup cover 330 covers the ball cup 33.

In this embodiment, the function of the ball cup 33 is to provide a mounting point for the rotor shaft 2 in the rubber cover 3, the ball cup 33 maintains the positioning of the rotor shaft 2 in the rubber cover 3, and at the same time, the user can adjust the position of the rotor shaft 2 in the rubber cover 3 through the ball cup 33, so as to adjust the rotor shaft 2.

The self-positioning fastening type inner rotor motor further comprises a rubber cover 3, wherein the rubber cover 3 comprises: an inductor 34 electrically connected to the connection terminal 32, a thermistor 36 electrically connected to the inductor 34, a capacitor 35 electrically connected to the thermistor 36, and a torsion spring 37 electrically connected to the commutator 31; an external power supply supplies power to the commutator 31 sequentially through the wiring terminal 32, the inductor 34, the thermistor 36, the capacitor 35 and the torsion spring 37.

In this embodiment, the inductor 34 and the capacitor form a resonant circuit, which performs a filtering function to stabilize the current in the coil on the rotor support 22.

Self-align fastening type inner rotor motor is at the during operation, because the heat effect of electric current causes easily the temperature of coil risees on the spider 22, avoids coil fusing or inside temperature overheated to cause the unable work of self-align fastening type inner rotor motor or influence life's problem, thermistor 36 is used for acquireing the temperature of coil, cuts off the power supply when the temperature is higher than the threshold value, avoids self-align fastening type inner rotor motor long-time work generates heat the service problem that causes. As for the principle of the thermistor 36 acquiring temperature and the principle of circuit breaking, those skilled in the art can realize the temperature measurement according to the prior art, and no further description is given in the present invention.

In a preferred embodiment of the present invention, a plurality of printed circuit boards are further disposed in the rubber cover 3 for controlling and adjusting the current inputted to the self-positioning fastening inner rotor motor, controlling the on/off and power parameters of the self-positioning fastening inner rotor motor,

the self-positioning fastening type inner rotor motor further includes a rear case 38; the rear shell 38 is snap-fitted to the rubber cover 3. The wiring terminal 32 is exposed out of the rear shell 38 and is electrically connected with an external power supply. A magnetic ring 380 mounted at the rear end of the rubber cover 3 is fixed in the rear housing 38, and the magnetic ring 380 is used for suppressing conducted interference. Meanwhile, a Hall element is installed on the printed circuit board, the magnetic ring 380 provides a signal source for the Hall element, and a user measures the rotating speed of the self-positioning fastening type inner rotor motor by connecting the Hall element.

The utility model discloses a front end bearing 21 among the self-align fastening type inner rotor motor is fixed in shell 1 through bearing bush 11, bearing bush 11 passes through preceding fender wall 111 and rear fender wall 112 and fixes front end bearing 21, eliminates the axial clearance to avoid the axial drive that rotor shaft 2 produced; bearing bush 11 with set up fixed glue film between the shell 1 and be used for eliminating the clearance, avoid the radial play that the rotor shaft produced. The utility model discloses an eliminate the clearance between rotor shaft 2 and the shell 1, in order to avoid the axial or the radial cluster that rotor shaft 2 produced move, reduce because of the friction loss that rotor shaft 2 cluster moved and produce between front end bearing 21 and the bearing bush 11, increase from the stability of positioning fastening type inner rotor motor mechanical properties and motor performance.

It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims

1. A self-positioning fastening type inner rotor motor comprising: a housing and a rotor shaft mounted in the housing, wherein the self-positioning fastening type inner rotor motor further comprises: the front end bearing is sleeved on the rotor shaft, and the bearing bush is arranged between the front end bearing and the shell;

2. The self-aligning inner rotor motor of claim 1, wherein the front end opening of the bearing bushing extends to both inside and outside of the bearing bushing to form the front blocking wall, and the bearing bushing is fixed to the front end of the housing through the front blocking wall;

3. The self-positioning fastening inner rotor motor of claim 1, wherein the rotor shaft is interference mounted in the front end bearing.

4. The self-positioning fastening inner rotor motor of claim 1, wherein the fixing glue layer is anaerobic glue.

5. The self-positioning fastening inner rotor motor of claim 1, comprising a rotor bracket mounted on the rotor shaft, the rotor bracket comprising: the rotor comprises a plurality of wire racks for winding wires and wire grooves positioned between two adjacent wire racks, wherein the wire grooves are obliquely arranged relative to the rotor shaft.

6. The self-positioning inner rotor motor of claim 5, wherein the rotor bracket includes a plurality of segments mounted on the rotor shaft, a subsequent segment being rotatably mounted relative to and fixedly secured against a preceding segment, adjacent segments being rotated at equal angles; the wire boards are attached to form the wire grooves and the wire racks.

7. The self-positioning fastening inner rotor motor of claim 1, further comprising: the commutator comprises a rubber cover arranged on the shell, a commutator arranged in the rubber cover and a wiring terminal electrically connected with the commutator;

8. The self-positioning fastening inner rotor motor of claim 7, further comprising: the ball cup is arranged in the rubber cover, and the cup cover is arranged in the rubber cover;

9. The self-positioning fastening inner rotor motor of claim 7, further comprising fixedly mounted in the glue cap: the inductor is electrically connected with the wiring terminal, the thermistor is electrically connected with the inductor, the capacitor is electrically connected with the thermistor, and the torsion spring is electrically connected with the commutator;

10. The self-positioning fastening inner rotor motor of claim 7, further comprising a back shell; the rear shell is mounted on the rubber cover in a clamping manner; the wiring terminal is exposed out of the rear shell and is electrically connected with an external power supply.