CN106787370B - Improved outer rotor motor and production method thereof - Google Patents
Improved outer rotor motor and production method thereof Download PDFInfo
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- CN106787370B CN106787370B CN201710195223.1A CN201710195223A CN106787370B CN 106787370 B CN106787370 B CN 106787370B CN 201710195223 A CN201710195223 A CN 201710195223A CN 106787370 B CN106787370 B CN 106787370B
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- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 238000001746 injection moulding Methods 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000002788 crimping Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 239000004411 aluminium Substances 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
- H02K15/028—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots for fastening to casing or support, respectively to shaft or hub
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/02—Casings or enclosures characterised by the material thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention provides an improved external rotor motor, which comprises: stator module, rotor subassembly, motor housing and bearing room subassembly, through the fixed ring of second in the rotor subassembly, the setting of second spliced pole and third fixed ring and the selection that the material is aluminium, improve the efficiency of motor, through the motor inner cup in the motor housing, the design of motor side cap and the selection that the material is steel, improve the joint strength of motor inner cup, through the cooperation design of outer axle, the interior axle, fine realization interior axle strengthening hardness, the outer axle reduces hardness, thereby guarantee the effect of the stability of work, this kind of improved generation external rotor motor, stability at the during operation has not only been guaranteed, and can select different outer axles according to different demands, thereby the suitability of motor has been improved.
Description
Technical Field
The invention relates to an improved outer rotor motor and a production method thereof.
Background
The outer rotor motor in the prior art has the following defects:
1. because the distance between the base and the load is regular, the motor shafts in the prior art are integrated, and the connection positions are from the fixed point to the base and then to the load, the motor shafts with the design are overlong in length, and the motor shafts from the fixed point to the base only have a simple fixing effect and do not account for the length from the base to the load;
2. because the motor shaft is integrally arranged, if the motor shaft hardness is too small, the motor is likely to shake in the rotating process, so that the edge of the bearing is acted on to the top pressure to damage the bearing, and the motor hardness is high at the connecting part of the motor shaft and the load, the motor is easy to break, and the end parts of most of the motor shafts need to be milled flat, so that the situation that the motor shaft is easier to break and is easy to vibrate in the rotating process is brought;
3. the motor end cover generally selects aluminum alloy to ensure motor efficiency, but the rigidity of the aluminum alloy is too low when the aluminum alloy is fixed with a motor shaft, so that the situation of too low connection effect is brought, and the situation of too low motor efficiency is also brought when the motor end cover with higher hardness is selected.
In summary, can provide one under the prerequisite of guaranteeing motor efficiency, both can improve motor end cover joint strength, can improve the rotatory stability of motor shaft again to it is necessary to guarantee motor shaft and motor body's joint strength's external rotor motor.
Disclosure of Invention
The invention aims to solve the technical problems that: the invention provides an improved outer rotor motor for solving the problems in the prior art.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides an improved generation external rotor motor, includes bearing room subassembly, stator module, rotor subassembly and the motor casing that sets gradually from inside to outside, the motor casing includes go-between, outer axle, interior axle, motor inner cup, mounting and motor side cap, have the connection end on the go-between, the outer wall of the lower extreme of outer axle with the inner wall fixed connection of connection end, the outer wall of the upper end of interior axle with the inner wall fixed connection of go-between, the outer axle with interior axle is coaxial, the lower part of go-between the cover be fixed with the mounting on the interior axle, the up end of motor inner cup with the lower bottom surface fixed connection of go-between, the inner wall of motor inner cup with the outer wall fixed connection of mounting, the up end of motor inner cup be the plane and with interior axle is perpendicular, the lower bottom surface of go-between be the plane and with interior axle is perpendicular, the bearing room subassembly cover fix on the inner axle, the inner wall of motor side cap with the lateral wall fixed connection of rotor body and with the laminating of motor inner cup.
Further, the stator module includes stator body, first solid fixed ring, first spliced pole and base ring, be provided with the stator groove on the stator body, first solid fixed ring sets up the upper portion of stator body, the base ring sets up the lower part of stator body, first spliced pole sets up in the stator groove, first solid fixed ring first spliced pole with the integrative injection moulding of base ring, the rotor module includes rotor body, motor enclosing cover, second solid fixed ring, second spliced pole and third solid fixed ring, the motor enclosing cover sets up the upper portion of motor side cap, the motor enclosing cover is provided with first through-hole, be provided with on the motor inner cover with the second through-hole of first through-hole intercommunication, be provided with the rotor groove on the rotor body, the second solid fixed ring sets up the upper portion of rotor body, the third solid fixed ring sets up the lower part of rotor body, the second spliced pole sets up in the rotor groove, the motor enclosing cover the second solid fixed ring second and the integrative injection moulding of second connecting pole.
Further, the bearing chamber assembly comprises a bottom cover, a bearing chamber body, a first bearing, a middle ring, a clamping ring, a gasket and a second bearing, wherein the outer wall of the bearing chamber body is respectively attached to the inner wall of the base ring, the inner wall of the stator body and the inner wall of the first fixing ring, the first bearing, the middle ring and the second bearing are sequentially sleeved on the inner shaft from top to bottom, the clamping ring is sleeved on the inner shaft at the lower part of the second bearing and attached to the lower bottom surface of the second bearing, and the outer wall of the bottom cover is fixedly connected with the inner wall of the base ring.
Further, the side wall of the bearing chamber body is provided with a first annular bulge, the upper part of the first annular bulge is attached to the bottom surface of the stator body, and the outer diameter of the first annular bulge is larger than the inner diameter of the stator body.
Further, a plurality of positioning columns are arranged on the circumference of the bottom of the connecting ring, positioning holes are formed in the motor inner cover, and the positioning columns are fixed in the positioning holes.
Further, the upper portion of the bearing chamber body has a second annular projection.
Further, the hardness of the outer shaft is 15 HRC-30 HRC, and the hardness of the inner shaft is greater than 40HRC.
Further, the motor inner cover and the motor side cover are made of steel, and the motor outer cover, the second fixing ring, the second connecting column and the third fixing ring are made of pure aluminum.
Further, the outer wall of the inner shaft is in pressure connection with the inner wall of the fixing piece, the outer wall of the fixing piece is in pressure connection with the inner wall of the motor inner cover, and the outer wall of the bottom cover is in pressure connection with the inner wall of the base ring.
The production method of the improved outer rotor motor comprises the following steps:
s1, arranging the stator body on a die, and then injection molding the first fixing ring, the first connecting column and the base ring to produce a stator assembly;
s2, clamping the motor side cover on the motor inner cover, welding and fixing the inner wall of the motor side cover and the outer wall of the rotor body, putting the rotor body into a die, and performing injection molding on the motor outer cover, the second fixing ring, the second connecting column and the third fixing ring to produce a rotor assembly;
s3, inserting the outer shaft into a mold, injection molding the connecting ring, clamping the outer shaft, and finish turning the inner wall of the connecting ring below the outer shaft by taking the outer shaft as a reference to form a matching surface;
s4, finely turning the upper end face of the motor inner cover and the lower bottom face of the connecting ring;
s5, the outer wall of the inner shaft is fixedly connected with the inner wall of the fixing piece in a pressure welding mode, and the outer wall of the fixing piece is fixedly connected with the inner wall of the motor inner cover in a pressure welding mode;
s6, plugging the bearing chamber body into the stator assembly, inserting the inner shaft into the bearing chamber body, sleeving the first bearing, the middle ring and the second bearing according to the insertion, arranging the clamping ring to prevent the inner shaft from being separated from the bearing chamber, and crimping the outer wall of the bottom cover with the inner wall of the base ring;
and S7, sleeving the connecting ring at the upper end of the inner shaft, so that the outer wall of the inner shaft is excessively matched with the matching surface, and the upper end surface of the motor cover is tightly attached to the lower bottom surface of the connecting ring and is fixedly riveted.
The improved outer rotor motor has the beneficial effects that firstly, the motor shaft is divided into the outer shaft and the inner shaft, so that the effects of high hardness of the inner shaft part and low hardness of the outer shaft part are well realized, the stability of the inner shaft part during working is improved, and the bearing chamber assembly is prevented from being damaged during working of the inner shaft.
Secondly, through the design of the base ring, the outer shaft, the fixing piece and the inner shaft to the load, the condition that the base ring has a certain rule to the load is well utilized, and the cost is saved to a certain extent;
furthermore, because the outer shaft and the inner shaft are separately designed, the inner shaft can be a standard shaft, and the outer shaft can be replaced according to different requirements of loads, so that the applicability of the outer rotor motor is improved;
then, the material of the motor cover is steel, so that the connection strength of the motor cover is improved, and the efficiency of the motor is reduced, but the materials of the torus, the second fixing ring, the second connecting column and the third fixing ring are pure aluminum, so that the effect of reducing the efficiency of the motor cover is compensated, and the efficiency is improved to a certain extent;
finally, through the bellied setting of first annular, form the tang, the fine bearing room of having fixed of cooperation bottom, through the bellied setting of second annular, can play to prevent rivers in the bearing room body to a certain extent.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a block diagram of a preferred embodiment of an improved outer rotor motor of the present invention;
FIG. 2 is a block diagram of a preferred embodiment of an improved outer rotor motor of the present invention;
fig. 3 is a block diagram of a preferred embodiment of the connecting ring of the present invention.
Fig. 4 is a block diagram of the structure of the preferred embodiment of the motor inner cover of the present invention.
Fig. 5 is a block diagram of the structure of the preferred embodiment of the motor cover of the present invention.
In the figure: 1. the motor comprises a connecting ring, 2, an outer shaft, 3, an inner shaft, 4, a motor inner cover, 5, a fixing piece, 6, a motor side cover, 7, a stator body, 8, a first fixing ring, 9, a first connecting column, 10, a base ring, 11, a rotor body, 12, a motor outer cover, 13, a second fixing ring, 14, a second connecting column, 15, a third fixing ring, 16, a bottom cover, 17, a bearing chamber body, 18, a first bearing, 19, a middle ring, 20, a clamping ring, 21, a gasket, 22, a second bearing, 23, a first annular bulge, 24, a second annular bulge, a1, a connecting end, a2, a positioning column, a3, a positioning hole, a4, a second through hole, a5 and a first through hole.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
As shown in fig. 1 to 5, an improved outer rotor motor of the present invention comprises a bearing chamber assembly, a stator assembly, a rotor assembly and a motor housing which are sequentially arranged from inside to outside, wherein the motor housing comprises a connecting ring 1, an outer shaft 2, an inner shaft 3, a motor inner cover 4, a fixing piece 5 and a motor side cover 6, a connecting end a1 is arranged on the connecting ring 1, the outer wall of the lower end of the outer shaft 2 is fixedly connected with the inner wall of the connecting end a1, the outer shaft 2 is coaxial with the inner shaft 3, the fixing piece 5 is sleeved on the inner shaft 3 at the lower part of the connecting ring 1, the upper end face of the motor inner cover 4 is fixedly connected with the lower bottom face of the connecting ring 1, the inner wall of the motor inner cover 4 is fixedly connected with the outer wall of the fixing piece 5, the upper end face of the motor inner cover 4 is a plane and is perpendicular to the inner shaft 3, the lower bottom face of the connecting ring 1 is a plane and is perpendicular to the inner shaft 3, the bearing chamber assembly is sleeved on the inner shaft 3, and the inner wall of the motor side cover 6 is fixedly connected with the side wall of the rotor body 11 and is attached to the outer wall of the motor inner cover 4.
The stator assembly comprises a stator body 7, a first fixed ring 8, a first connecting column 9 and a base ring 10, wherein a stator groove is formed in the stator body 7, the first fixed ring 8 is arranged on the upper portion of the stator body 7, the base ring 10 is arranged on the lower portion of the stator body 7, the first connecting column 9 is arranged in the stator groove, the first fixed ring 8, the first connecting column 9 and the base ring 10 are integrally formed in an injection mode, the rotor assembly comprises a rotor body 11, a motor outer cover 12, a second fixed ring 13, a second connecting column 14 and a third fixed ring 15, the motor outer cover 12 is arranged on the upper portion of the motor side cover 6, a first through hole a5 is formed in the motor outer cover 12, a second through hole a4 which is mutually communicated with the first through hole a5 is formed in the motor inner cover 4, a rotor groove is formed in the rotor body 11, the second fixed ring 13 is arranged on the upper portion of the rotor body 11, the third fixed ring 15 is arranged on the lower portion of the rotor body 11, the second connecting column 14 is arranged in the rotor groove, and the motor outer cover 12, the second fixed ring 13, the second connecting column 14 and the third fixed ring 15 are integrally formed in an injection mode. The first through hole a5 and the second through hole a4 are provided as injection holes for injection molding.
The bearing chamber assembly comprises a bottom cover 16, a bearing chamber body 17, a first bearing 18, an intermediate ring 19, a clamping ring 20, a gasket 21 and a second bearing 22, wherein the outer wall of the bearing chamber body 17 is respectively attached to the inner wall of the base ring 10, the inner wall of the stator body 7 and the inner wall of the first fixing ring 8, the first bearing 18, the intermediate ring 19 and the second bearing 22 are sequentially sleeved on the inner shaft 3 from top to bottom, the clamping ring 20 is sleeved on the inner shaft 3 at the lower part of the second bearing 22 and attached to the lower bottom surface of the second bearing 22, and the outer wall of the bottom cover 16 is fixedly connected with the inner wall of the base ring 10. The snap ring 20 cooperates with the washer 21 to limit the first bearing 18, the intermediate ring 19 and the second bearing 22, and secondly to limit the outer shaft 2 and the inner shaft 3.
The side wall of the bearing chamber body 17 is provided with a first annular bulge 23, the upper part of the first annular bulge 23 is attached to the bottom surface of the stator body 7, and the outer diameter of the first annular bulge 23 is larger than the inner diameter of the stator body 7. By the arrangement of the first annular projection 23, a spigot is formed, which can well play a relatively fixed role for the stator body 1.
A plurality of positioning columns a2 are arranged on the circumference of the bottom of the connecting ring 1, positioning holes a3 are formed in the motor inner cover 4, and the positioning columns a2 are fixed in the positioning holes a 3.
The upper part of the bearing chamber body 17 has a second annular projection 24. When the outer rotor motor is operated obliquely, when water permeates into the motor, it is possible to play a role in preventing water from permeating into the bearing chamber body 17 to some extent.
The hardness of the outer shaft 2 was 20HRC and the hardness of the inner shaft 3 was 80HRC. The outer shaft 2 is designed to have a hardness of 20HRC, so that the situation of brittle fracture due to too high rigidity in the rotating process can be well prevented, and secondly, the situation of unstable operation due to too low rigidity in the rotating process and damage to the first bearing 18 and the second bearing 22 can be well ensured through the design of the inner shaft 3 having a hardness of 80HRC.
The materials of the motor inner cover 4 and the motor side cover 6 are steel, and the materials of the motor outer cover 12, the second fixing ring 13, the second connecting post 14 and the third fixing ring 15 are pure aluminum. The joint strength of the motor inner cover 4 and the motor side cover 6 can be improved well, and the situation that the motor efficiency is reduced due to the fact that the motor inner cover 4 and the motor side cover 6 are made of steel can be well compensated through the fact that the motor outer cover 12, the second fixing ring 13, the second connecting column 14 and the third fixing ring 15 are made of pure aluminum, so that the motor efficiency is improved to a certain extent.
The outer wall of the inner shaft 3 is in pressure connection with the inner wall of the fixing piece 5, the outer wall of the fixing piece 5 is in pressure connection with the inner wall of the motor inner cover 4, and the outer wall of the bottom cover 16 is in pressure connection with the inner wall of the base ring 10.
The production method of the improved outer rotor motor is characterized by comprising the following steps of:
s1, arranging a stator body 7 on a die, and then injection molding a first fixing ring 8, a first connecting column 9 and a base ring 10 to produce a stator assembly;
s2, clamping the motor side cover 6 on the motor inner cover 4, welding and fixing the inner wall of the motor side cover 6 with the outer wall of the rotor body 11, putting the rotor body 11 into a mold, and injection molding the motor outer cover 12, the second fixing ring 13, the second connecting column 14 and the third fixing ring 15 to produce a rotor assembly;
s3, inserting the outer shaft 2 into a die, injection molding the connecting ring 1, clamping the outer shaft 2, and finish turning the inner wall of the connecting ring 1 below the outer shaft 2 by taking the outer shaft 2 as a reference to form a matching surface;
s4, finely turning the upper end face of the motor inner cover 4 and the lower bottom face of the connecting ring 1;
s5, the outer wall of the inner shaft 3 is fixedly connected with the inner wall of the fixing piece 5 in a pressure welding way, and the outer wall of the fixing piece 5 is fixedly connected with the inner wall of the motor inner cover 4 in a pressure welding way;
s6, plugging the bearing chamber body 17 into the stator assembly, inserting the inner shaft 3 into the bearing chamber body 17, sleeving the first bearing 18, the middle ring 19 and the second bearing 22 according to the insertion, arranging the clamping ring 20 to prevent the inner shaft 3 from being separated from the bearing chamber, and crimping the outer wall of the bottom cover 16 with the inner wall of the base ring 10;
and S7, sleeving the connecting ring 1 at the upper end of the inner shaft 3, so that the outer wall of the inner shaft 3 is excessively matched with the matching surface, and the upper end surface of the motor cover is tightly attached to the lower bottom surface of the connecting ring 1 and is fixedly riveted.
The first fixing ring 8, the first connecting column 9 and the base ring 10 may be made of plastic or aluminum alloy, the motor outer cover 12, the second fixing ring 13, the second connecting column 14 and the third fixing ring 15 are made of pure aluminum, and the outer diameter of the bottom cover 16 is tightly matched with the inner diameter of the base ring 10. The material of the bearing chamber body 17 may be aluminum alloy, steel or nonmetal, and the inner walls of the first bearing 18 and the second bearing 22 are loose fit with the side wall of the inner shaft 3, and the outer walls of the first bearing 18 and the second bearing 22 are tightly fit with the bearing chamber body 17.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (6)
1. The production method of the improved outer rotor motor is characterized by comprising the following steps of:
the improved outer rotor motor comprises a bearing chamber assembly, a stator assembly, a rotor assembly and a motor shell which are sequentially arranged from inside to outside, and is characterized in that: the motor housing comprises a connecting ring (1), an outer shaft (2), an inner shaft (3), a motor inner cover (4), a fixing piece (5) and a motor side cover (6), wherein a connecting end head (a 1) is arranged on the connecting ring (1), the outer wall of the lower end of the outer shaft (2) is fixedly connected with the inner wall of the connecting end head (a 1), the outer wall of the upper end of the inner shaft (3) is fixedly connected with the inner wall of the connecting ring (1), the outer shaft (2) is coaxial with the inner shaft (3), the fixing piece (5) is sleeved on the inner shaft (3) at the lower part of the connecting ring (1), the upper end face of the motor inner cover (4) is fixedly connected with the lower bottom face of the connecting ring (1), the inner wall of the motor inner cover (4) is fixedly connected with the outer wall of the fixing piece (5), the upper end face of the motor inner cover (4) is a plane and is perpendicular to the inner shaft (3), the lower end face of the connecting ring (1) is a plane and is perpendicular to the inner wall of the motor side cover (3), the inner cover (3) is sleeved on the inner cover (6), and the inner cover (4) is fixedly attached to the outer wall of the motor housing (11);
stator module includes stator body (7), first solid fixed ring (8), first spliced pole (9) and base ring (10), be provided with the stator groove on stator body (7), first solid fixed ring (8) set up the upper portion of stator body (7), base ring (10) set up the lower part of stator body (7), first spliced pole (9) set up in the stator groove, first solid fixed ring (8) first spliced pole (9) with base ring (10) integrative injection moulding, the rotor module includes rotor body (11), motor enclosing cover (12), second solid fixed ring (13), second spliced pole (14) and third solid fixed ring (15), motor enclosing cover (12) set up the upper portion of motor enclosing cover (6), be provided with first through-hole (a 5) on motor enclosing cover (4) be provided with second through-hole (a 5) intercommunication second through-hole (a) on motor enclosing cover (4), rotor body (11) are in the fixed ring (11), rotor body (14) are in the fixed groove, rotor body (11) are in the fixed position, rotor body (11) are in the fixed ring (15) setting up down The second fixing ring (13), the second connecting column (14) and the third fixing ring (15) are integrally injection molded;
the bearing chamber assembly comprises a bottom cover (16), a bearing chamber body (17), a first bearing (18), a middle ring (19), a clamping ring (20), a gasket (21) and a second bearing (22), wherein the outer wall of the bearing chamber body (17) is respectively attached to the inner wall of the base ring (10), the inner wall of the stator body (7) and the inner wall of the first fixing ring (8), the first bearing (18), the middle ring (19) and the second bearing (22) are sequentially sleeved on the inner shaft (3) from top to bottom, the clamping ring (20) is sleeved on the inner shaft (3) at the lower part of the second bearing (22) and attached to the lower bottom surface of the second bearing (22), and the outer wall of the bottom cover (16) is fixedly connected with the inner wall of the base ring (10); and
the production method of the improved outer rotor motor comprises the following steps:
s1, arranging the stator body (7) on a die, and then injection molding the first fixing ring (8), the first connecting column (9) and the base ring (10) to produce a stator assembly;
s2, clamping the motor side cover (6) on the motor inner cover (4), welding and fixing the inner wall of the motor side cover (6) and the outer wall of the rotor body (11), putting the rotor body (11) into a mould, and injection molding the motor outer cover (12), the second fixing ring (13), the second connecting column (14) and the third fixing ring (15) to produce a rotor assembly;
s3, inserting the outer shaft (2) into a mold, injection molding the connecting ring (1), clamping the outer shaft (2), and finish turning the inner wall of the connecting ring (1) below the outer shaft (2) by taking the outer shaft (2) as a reference to form a matching surface;
s4, finely turning the upper end face of the motor inner cover (4) and the lower bottom face of the connecting ring (1);
s5, the outer wall of the inner shaft (3) is fixedly connected with the inner wall of the fixing piece (5) in a pressure welding mode, and the outer wall of the fixing piece (5) is fixedly connected with the inner wall of the motor inner cover (4) in a pressure welding mode;
s6, plugging the bearing chamber body (17) into a stator assembly, inserting the inner shaft (3) into the bearing chamber body (17) and sleeving the first bearing (18), the middle ring (19) and the second bearing (22) in sequence, arranging the clamping ring (20) to prevent the inner shaft (3) from being separated from the bearing chamber, and crimping the outer wall of the bottom cover (16) with the inner wall of the base ring (10);
s7, sleeving the connecting ring (1) at the upper end of the inner shaft (3), enabling the outer wall of the inner shaft (3) to be excessively matched with the matching surface, and enabling the upper end face of the motor inner cover (4) to be tightly attached to the lower bottom face of the connecting ring (1) and fixed through riveting.
2. The method of claim 1, wherein: the side wall of the bearing chamber body (17) is provided with a first annular bulge (23), the upper part of the first annular bulge (23) is attached to the bottom surface of the stator body (7), and the outer diameter of the first annular bulge (23) is larger than the inner diameter of the stator body (7).
3. The method of claim 1, wherein: a plurality of positioning columns (a 2) are arranged on the circumference of the bottom of the connecting ring (1), positioning holes (a 3) are formed in the motor inner cover (4), and the positioning columns (a 2) are fixed in the positioning holes (a 3).
4. The method of claim 1, wherein: the upper part of the bearing chamber body (17) is provided with a second annular bulge (24).
5. The production method according to any one of claims 1 to 4, wherein: the hardness of the outer shaft (2) is 15-30 HRC, and the hardness of the inner shaft (3) is more than 40HRC.
6. The method of claim 1, wherein: the motor inner cover (4) and the motor side cover (6) are made of steel, and the motor outer cover (12), the second fixing ring (13), the second connecting column (14) and the third fixing ring (15) are made of pure aluminum.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710195223.1A CN106787370B (en) | 2017-03-29 | 2017-03-29 | Improved outer rotor motor and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710195223.1A CN106787370B (en) | 2017-03-29 | 2017-03-29 | Improved outer rotor motor and production method thereof |
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| Publication Number | Publication Date |
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| CN106787370A CN106787370A (en) | 2017-05-31 |
| CN106787370B true CN106787370B (en) | 2023-12-08 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI694662B (en) * | 2018-07-23 | 2020-05-21 | 大陸商昆山廣興電子有限公司 | Motor and its rotor |
| CN111064305A (en) * | 2019-12-30 | 2020-04-24 | 深圳市科创兴电机科技有限公司 | Motor casing, brushless DC motor and unmanned aerial vehicle |
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| CN201440624U (en) * | 2009-08-31 | 2010-04-21 | 珠海格力电器股份有限公司 | Device for decomposing stress of motor and motor |
| CN103227519A (en) * | 2013-05-08 | 2013-07-31 | 佛山市威灵洗涤电机制造有限公司 | Motor stator and external rotor motor with motor stator |
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| CN205123466U (en) * | 2015-10-22 | 2016-03-30 | 中山大洋电机股份有限公司 | Waterproof structure of external rotor electric machine |
| CN206585412U (en) * | 2017-03-29 | 2017-10-24 | 常州朗奇威电器有限公司 | A kind of modified external rotor electric machine |
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| CN201440624U (en) * | 2009-08-31 | 2010-04-21 | 珠海格力电器股份有限公司 | Device for decomposing stress of motor and motor |
| CN103227519A (en) * | 2013-05-08 | 2013-07-31 | 佛山市威灵洗涤电机制造有限公司 | Motor stator and external rotor motor with motor stator |
| CN204615547U (en) * | 2015-05-13 | 2015-09-02 | 中山大洋电机制造有限公司 | A kind of motor of stretch end cap and application thereof |
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