CN214281070U - Outer rotor motor with encapsulated injection molding bracket - Google Patents
Outer rotor motor with encapsulated injection molding bracket Download PDFInfo
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- CN214281070U CN214281070U CN202022975080.6U CN202022975080U CN214281070U CN 214281070 U CN214281070 U CN 214281070U CN 202022975080 U CN202022975080 U CN 202022975080U CN 214281070 U CN214281070 U CN 214281070U
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- fixed
- rotor
- injection molding
- stator
- retainer
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Abstract
The utility model discloses an encapsulate support external rotor electric machine of moulding plastics, include: stator assembly and rotor subassembly, stator assembly includes: the stator comprises a fixed support, a stator chip and a winding, wherein the fixed support is used for externally mounting and fixing, the stator chip is mounted on the fixed support, and the winding is mounted on the stator chip; the rotor assembly includes: the rotor comprises a rotor shaft, a rotor shell and a plurality of magnets fixed on the inner wall of the rotor shell; the rotor shaft is arranged in the fixed support through a bearing, and the winding is electrified to enable the magnet to drive the rotor shaft to rotate; the fixed bolster includes: the injection molding device comprises a retainer, an inner injection molding part fixedly arranged on the inner wall of the retainer and an outer injection molding part fixed on the outer wall of the retainer; openings at two ends of the retainer and two end walls of the inner injection part form an accommodating cavity, and the bearing is arranged in the accommodating cavity; the outer wall of the outer injection molding part is provided with a positioning key, the inner wall of the stator chip is provided with a positioning groove, and the positioning key is inserted into the positioning groove, so that the stator chip is fixed on the outer injection molding part.
Description
Technical Field
The utility model relates to an external rotor electric machine technical field especially relates to an encapsulate support external rotor electric machine of moulding plastics.
Background
The outer rotor motor is a motor in which a stator part of the motor is positioned inside the motor, a rotor shaft is relatively fixed with a motor shell, and the motor shell is stressed to drive the rotor shaft to rotate.
The support part in the outer rotor motor stator plays two roles, namely, the motor is fixed outwards, and the stator component in the motor is fixed. The problem of motor damage easily appears in current outer rotor motor's supporting structure unstability. If the bracket is made of metal material, the manufacturing cost of the bracket is increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that outer rotor electric machine structure is unstable among the prior art, support cost of manufacture is high, the utility model provides a seal on the retainer and mould plastics the support external rotor electric machine of moulding plastics of encapsulating of constituteing the fixed bolster, both can reduce the cost of manufacture of support, also can guarantee supporting structure's stability.
The utility model discloses a following technical scheme realizes:
an encapsulated injection molded bracket outer rotor motor comprising: a stator assembly and a rotor assembly, the stator assembly comprising: the stator comprises a fixed support, a stator chip and a winding, wherein the fixed support is used for being installed and fixed outwards, the stator chip is installed on the fixed support, and the winding is installed on the stator chip;
the rotor assembly includes: the rotor comprises a rotor shaft, a rotor shell and a plurality of magnets fixed on the inner wall of the rotor shell; the rotor shaft is arranged in the fixed support through a bearing, and the winding is electrified to enable the magnet to drive the rotor shaft to rotate; the fixing bracket includes:
the injection molding device comprises a retainer, an inner injection molding part fixedly arranged on the inner wall of the retainer and an outer injection molding part fixed on the outer wall of the retainer;
openings at two ends of the retainer and two end walls of the inner injection molding part form an accommodating cavity, and the bearing is installed in the accommodating cavity;
the outer part of moulding plastics is provided with the navigation key on the outer wall, be provided with the constant head tank on the stator chip inner wall, the navigation key inserts in the constant head tank, make the stator chip is fixed on the outer part of moulding plastics.
Furthermore, the retainer is provided with a through hole, the outer injection molding part comprises a connecting part, the connecting part penetrates through the through hole and is fixed on the inner injection molding part, and the inner injection molding part and the outer injection molding part are relatively fixed through the connecting part.
Further, the retainer comprises a mounting plate, and the outer injection molding part comprises an injection molding plate;
the mounting plate is provided with a plurality of fixing feet, the fixing feet are provided with fixing screw holes, and the outer rotor motor of the encapsulation injection molding bracket is externally mounted and fixed through the mounting plate;
the injection molding plate is provided with a side plate, the side plate is attached to and mounted on the side wall of the fixed foot, and the mounting plate is fixed in the injection molding plate.
Furthermore, the retainer is provided with a plurality of first glue holes for storing glue solution, and the injection molding plate is bonded and fixed on the mounting plate.
Furthermore, the inner injection molding part is provided with a plurality of second glue holes, glue liquid is stored in the second glue holes, and the bearing is fixedly bonded in the accommodating cavity.
Furthermore, a waveform gasket is arranged in the containing cavity and located between the containing cavity and the bearing, and the waveform gasket buffers the bearing.
Furthermore, the stator assembly comprises a control board arranged on the fixed support, the control board is electrically connected with the winding, an external circuit supplies power to the winding through the control board, and the control board enables the winding to be connected with or disconnected from the external circuit.
Further, stator module includes the insulating piece, the insulating piece sets up the fixed bolster with between the control panel.
Further, stator module includes insulating cover, insulating cover sets up the control panel with between the stator chip, insulating cover pastes to install on the control panel.
Further, the rotor shaft comprises a clamping groove, the rotor assembly comprises a clamp spring, and the clamp spring is installed in the clamping groove and fixed on the rotor shaft;
the clamp spring is abutted against the bearing, so that the rotor shaft is fixed in the fixed support.
The beneficial effects of the utility model reside in that:
in the utility model, the fixing bracket is provided with a retainer for keeping the stability of the fixing bracket; the retainer is wrapped and moulded with interior injection molding layer and is fixed rotor subassembly, and outer injection molding layer is fixed stator core. The utility model discloses a carry out the encapsulation on the retainer and mould plastics, both can increase the stability of fixed bolster structure can also reduce simultaneously the cost of manufacture of fixed bolster.
Drawings
Fig. 1 is a schematic perspective view of the present invention;
fig. 2 is a schematic perspective view of a rotor assembly according to the present invention;
fig. 3 is a schematic perspective view of a stator assembly of the present invention;
fig. 4 is a schematic view of an exploded structure of a stator assembly of the present invention;
fig. 5 is a schematic sectional structure view of the inner and outer injection molding parts 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 to 3, the present invention discloses an outer rotor motor with an encapsulated injection molded bracket, comprising: stator assembly 1 and rotor assembly 2:
the stator assembly 1 includes: the stator comprises a fixed support 11 for mounting and fixing the stator, a stator chip 12 mounted on the fixed support 11 and a winding 13 mounted on the stator chip 12; specifically, the stator core 12 is provided with a plurality of mounting teeth 122, and the winding 13 is wound around the mounting teeth 122;
the rotor assembly 2 includes: a rotor shaft 21, a rotor case 22, and a plurality of magnets 23 fixed to an inner wall of the rotor case 22; specifically, the rotor shaft 21 is fixed in the rotor housing 22.
The installation relationship between the stator assembly 1 and the rotor assembly 2 is as follows: the rotor shaft 21 is mounted in the stationary bracket 11 by means of a bearing 24. The winding 13 is energized, so that the magnet 23 drives the housing and the rotor shaft 21 to rotate.
Referring to fig. 3 and 4, the fixing bracket 11 includes:
the bearing comprises a retainer 111, an inner injection part 113 fixedly arranged on the inner wall of the retainer 111 and an outer injection part 112 fixed on the outer wall of the retainer 111.
The openings at the two ends of the retainer 111 and the two end walls of the inner injection molding part 113 form a containing cavity 114, and the bearing 24 is installed in the containing cavity 114.
In the present embodiment, the rotor shaft 21 is mounted in the fixing bracket 11 through the bearing 24, so as to avoid abrasion with the fixing bracket 11 when the rotor shaft 21 applies work to rotate outwards. The inner injection molding part 113 is located inside the holder 111, and the length of the inner injection molding part 113 is shorter than that of the holder 111, so that the openings at both ends of the holder 111 and the walls at both ends of the inner injection molding part 113 form accommodating cavities 114, the accommodating cavities 114 are respectively located at both sides of the inner injection molding part 113, and the bearing 24 is installed in the accommodating cavity 114.
The outer wall of the outer injection molding part 112 is provided with a positioning key 112a, the inner wall of the stator chip 12 is provided with a positioning groove 121, and the positioning key 112a is inserted into the positioning groove 121, so that the stator chip 12 is fixed on the outer injection molding part 112.
The winding 13 is fixed on the stator chip 12, and when the winding 13 is electrified, the winding 13 is subjected to the reaction force of the magnet 23 to drive the stator chip 12 to rotate, so that the power of the motor is reduced, and the normal use of the motor is influenced. In order to prevent the stator chip 12 from rotating relative to the fixing bracket 11 and maintain the structural stability between the stator chip 12 and the fixing bracket 11, a positioning key 112a is disposed on the outer wall of the outer injection molding part 112, a positioning groove 121 adapted to the positioning key 112a is disposed on the inner wall of the stator chip 12, and the positioning key 112a is inserted into the positioning groove 121 to fix the stator chip 12 and the fixing bracket 11 relative to each other, so as to prevent the stator chip 12 from rotating under force.
In fig. 3, the positions of the positioning key 112a and the positioning groove 121 are different, and in order to show the arrangement positions of the positioning groove 121 and the positioning key 112a, the positions of the positioning key 112a and the positioning groove 121 correspond to each other during actual installation, so that the positioning key 112a is inserted into the positioning groove 121.
Referring to fig. 3 to 5, the holder 111 is provided with a through hole 111a, the outer injection part 112 includes a connecting part 112b, the connecting part 112b passes through the through hole 111a and is fixed on the inner injection part 113, and the inner injection part 113 and the outer injection part 112 are relatively fixed by the connecting part 112 b.
In this embodiment, the inner injection molding part 113, the outer injection molding part 112 and the connecting part 112b are formed by integral injection molding, and two ends of the connecting part 112b are fixed on the inner injection molding part 113 and the outer injection molding part 112 to keep the position between the inner injection molding part 113 and the outer injection molding part 112 relatively fixed, so as to prevent the inner injection molding part 113 from moving in the retainer 111 and stably fix the inner injection molding part 113 and the outer injection molding part 112 on the retainer 111. During the injection molding process, the injection molding material passes through the through hole 111a, and the connection portion 112b is formed when the injection molding material is solidified.
The holder 111 includes a mounting plate 111b, and the outer injection part 112 includes an injection plate 115. The mounting plate 111b is provided with a plurality of fixing pins 111d, the fixing pins 111d are provided with fixing screw holes, and bolts penetrate through the fixing screw holes to fix the mounting plate 111b and the injection molding plate 115 outwards, so that the outer rotor motor of the encapsulating and injection molding bracket is installed outwards through the mounting plate 111 b.
The injection plate 115 is provided with a side plate 115a, and the side plate 115a is mounted against the side wall of the fixing leg 111d, so that the mounting plate 111b is fixed in the injection plate 115.
In this embodiment, the side plate 115a is mounted against the side wall of the fixing leg 111d, which effectively ensures the fixation of the outer injection molding part 112 and the holder 111, prevents the outer injection molding part 112 from shifting relative to the holder 111,
the holder 111 is provided with a plurality of first glue holes 111c for storing glue, and the injection molding plate 115 is fixed on the mounting plate 111b in an adhering manner.
In this embodiment, the injection molding plate 115 and the mounting plate 111b are further fixed by bonding, so as to further stabilize the structure of the fixing bracket 11, and after injection molding is finished, glue solution is injected into the first glue hole 111c, so that the injection molding plate 115 and the mounting plate 111b are fixed, separation between the injection molding plate 115 and the mounting plate 111b is avoided, and the structural stability of the outer rotor motor of the encapsulated injection molding bracket when being fixed to the outside is ensured.
The inner injection molding part 113 is provided with a plurality of second glue holes 113a, glue is stored in the second glue holes 113a, and the bearing 24 is fixed in the accommodating cavity 114 in a bonding manner.
The utility model discloses a glue hole that sets up on the portion 113 of moulding plastics in is used for hiding gluey to bonding fixing bearing 24 avoids bearing 24 breaks away from holding chamber 114.
A wave-shaped gasket 116 is arranged in the accommodating cavity 114, the wave-shaped gasket 116 is located between the accommodating cavity 114 and the bearing 24, and the wave-shaped gasket 116 cushions the bearing 24.
The stator assembly 1 comprises a control board 14 installed on the fixing bracket 11, the control board 14 is electrically connected with the winding 13, an external circuit supplies power to the winding 13 through the control board 14, and the control board 14 enables the winding 13 to be connected with or disconnected from the external circuit.
In this embodiment, after the outer rotor motor of the encapsulating and injection molding bracket is installed, the rotating speed, the on-off or the off-state of the outer rotor motor of the encapsulating and injection molding bracket needs to be controlled, so that a control board 14 is arranged between the winding 13 and an external circuit to control the on-off and the magnitude of the current in the winding 13, and further control the output power, the on-off or the off-state performance of the outer rotor motor of the encapsulating and injection molding bracket. In an embodiment of the present invention, the control board 14 is a printed circuit board, and the technical solutions such as the opening, closing and output power of the control board 14 control motor can be realized by the skilled in the art through the prior art, which is not repeated in this embodiment.
In a preferred embodiment of the present invention, a thermistor is connected to the control board 14, the thermistor is fixed on the winding 13 through a thermal conductive adhesive, the control board 14 obtains the temperature of the winding 13 through the thermistor, when the winding 13 exceeds a threshold value, the control board 14 opens the winding 13, and avoids the damage of the internal circuit of the motor caused by the over-high temperature of the winding 13.
The stator assembly 1 comprises an insulating sheet 15, and the insulating sheet 15 is arranged between the fixed bracket 11 and the control board 14. The stator assembly 1 further comprises an insulating sleeve 16, the insulating sleeve 16 is arranged between the control board 14 and the stator core 12, and the insulating sleeve 16 is mounted on the control board 14 in an abutting mode.
In this embodiment, in order to avoid short circuit of the internal circuit of the motor caused by contact between the control board 14 and the fixed bracket 11 or the winding 13, the two sides of the control board 14 are respectively provided with an insulating sheet 15 and an insulating sleeve 16 to ensure insulation between the control board 13 and the fixed bracket 11 or the winding 13. In the prior art, in order to maintain the insulating property of the control board 13, an insulating strip is usually pasted on the control board 13, and then a sticker on the insulating strip is torn off, so that the manufacturing process is complicated. The utility model discloses an insulating cover 16 and insulating piece 15
Referring to fig. 2, the rotor shaft 21 includes a locking groove 211, the rotor assembly 2 includes a locking spring 212, and the locking spring 212 is mounted in the locking groove 211 and fixed on the rotor shaft 21; the clamp spring 212 abuts against the bearing 24, so that the rotor shaft 21 is fixed in the fixing bracket 11.
In the present invention, the fixing bracket 11 is provided with a retainer 111 for maintaining the stability of the fixing bracket 11; the retainer 111 is wrapped and moulded to have interior plastic-injected layer to fix rotor subassembly 2, and outer plastic-injected layer is fixed stator core. The utility model discloses a carry out the encapsulation on retainer 111 and mould plastics, both can increase the stability of fixed bolster 11 structures can also reduce simultaneously the cost of manufacture of fixed bolster 11.
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 (10)
1. An encapsulated injection molded bracket outer rotor motor comprising: a stator assembly and a rotor assembly, the stator assembly comprising: the stator comprises a fixed support, a stator chip and a winding, wherein the fixed support is used for being installed and fixed outwards, the stator chip is installed on the fixed support, and the winding is installed on the stator chip;
the rotor assembly includes: the rotor comprises a rotor shaft, a rotor shell and a plurality of magnets fixed on the inner wall of the rotor shell; the rotor shaft is arranged in the fixed support through a bearing, and the winding is electrified to enable the magnet to drive the rotor shaft to rotate; characterized in that, the fixed bolster includes:
the injection molding device comprises a retainer, an inner injection molding part fixedly arranged on the inner wall of the retainer and an outer injection molding part fixed on the outer wall of the retainer;
openings at two ends of the retainer and two end walls of the inner injection molding part form an accommodating cavity, and the bearing is installed in the accommodating cavity;
the outer part of moulding plastics is provided with the navigation key on the outer wall, be provided with the constant head tank on the stator chip inner wall, the navigation key inserts in the constant head tank, make the stator chip is fixed on the outer part of moulding plastics.
2. The encapsulated and injection molded bracket external rotor electric machine of claim 1, wherein the retainer is provided with a through hole, the outer injection molded part comprises a connecting part which passes through the through hole and is fixed on the inner injection molded part, and the inner injection molded part and the outer injection molded part are relatively fixed through the connecting part.
3. The encapsulated injection molded bracket external rotor electric machine of claim 1, wherein the cage comprises a mounting plate and the outer injection molded portion comprises an injection molded plate;
the mounting plate is provided with a plurality of fixing feet, the fixing feet are provided with fixing screw holes, and the outer rotor motor of the encapsulation injection molding bracket is externally mounted and fixed through the mounting plate;
the injection molding plate is provided with a side plate, the side plate is attached to and mounted on the side wall of the fixed foot, and the mounting plate is fixed in the injection molding plate.
4. The encapsulated and injection-molded bracket external rotor motor according to claim 3, wherein the retainer is provided with a plurality of first glue holes for storing glue solution, and the injection-molded plate is adhesively fixed on the mounting plate.
5. The outer rotor motor with the encapsulated injection-molded bracket as claimed in claim 1, wherein the inner injection-molded part is provided with a plurality of second glue holes, glue is stored in the second glue holes, and the bearing is fixed in the accommodating cavity in an adhesion manner.
6. The encapsulated and injection molded bracket external rotor electric machine of claim 1, wherein a wave washer is arranged in the accommodating cavity, the wave washer is positioned between the accommodating cavity and the bearing, and the wave washer cushions the bearing.
7. The encapsulating and injection molding bracket external rotor electric machine according to claim 1, wherein the stator assembly comprises a control board mounted on the fixed bracket, the control board is electrically connected with the windings, an external circuit supplies power to the windings through the control board, and the control board makes or breaks the windings and the external circuit.
8. The encapsulated, injection molded bracket external rotor electric machine of claim 7, wherein said stator assembly includes an insulating sheet disposed between said stationary bracket and said control board.
9. The encapsulated injection molded bracket external rotor electric machine of claim 7, wherein the stator assembly comprises an insulating sleeve disposed between the control board and the stator core pieces, the insulating sleeve being mounted against the control board.
10. The encapsulated rotor bracket external rotor electric machine of claim 7, wherein the rotor shaft comprises a snap groove, and the rotor assembly comprises a snap spring, the snap spring being mounted in the snap groove and fixed on the rotor shaft;
the clamp spring is abutted against the bearing, so that the rotor shaft is fixed in the fixed support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022975080.6U CN214281070U (en) | 2020-12-08 | 2020-12-08 | Outer rotor motor with encapsulated injection molding bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022975080.6U CN214281070U (en) | 2020-12-08 | 2020-12-08 | Outer rotor motor with encapsulated injection molding bracket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214281070U true CN214281070U (en) | 2021-09-24 |
Family
ID=77780930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022975080.6U Active CN214281070U (en) | 2020-12-08 | 2020-12-08 | Outer rotor motor with encapsulated injection molding bracket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214281070U (en) |
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2020
- 2020-12-08 CN CN202022975080.6U patent/CN214281070U/en active Active
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