CN108916255B - Spline housing for motor, rotor assembly, motor and household appliance - Google Patents
Spline housing for motor, rotor assembly, motor and household appliance Download PDFInfo
- Publication number
- CN108916255B CN108916255B CN201811091093.8A CN201811091093A CN108916255B CN 108916255 B CN108916255 B CN 108916255B CN 201811091093 A CN201811091093 A CN 201811091093A CN 108916255 B CN108916255 B CN 108916255B
- Authority
- CN
- China
- Prior art keywords
- spline housing
- injection molding
- housing body
- holes
- axial positioning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000001746 injection moulding Methods 0.000 claims abstract description 61
- 230000002093 peripheral effect Effects 0.000 claims abstract description 18
- 239000004033 plastic Substances 0.000 abstract description 8
- 229920003023 plastic Polymers 0.000 abstract description 8
- 238000004806 packaging method and process Methods 0.000 abstract description 3
- 238000005406 washing Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D2001/103—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via splined connections
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention provides a spline housing for a motor, a rotor assembly, the motor and a household appliance, wherein the spline housing for the motor comprises a spline housing body, injection molding teeth and an axial positioning piece, the spline housing body is cylindrical, the injection molding teeth are arranged on the peripheral wall of the spline housing body, the axial positioning piece extends along the radial direction of the spline housing body from the peripheral wall of the spline housing body to the direction away from the peripheral wall, the minimum distance between the edge of the axial positioning piece and the central shaft of the spline housing body is larger than the maximum distance between the injection molding teeth and the central shaft of the spline housing body, a plurality of through holes are formed in the axial positioning piece and are arranged along the circumferential direction of the axial positioning piece, and the through holes penetrate through the axial positioning piece along the axial direction parallel to the spline housing body. The spline housing can increase the reliability of combination with the rotor after plastic packaging.
Description
Technical Field
The invention relates to the field of motors, in particular to a spline housing for a motor, a rotor assembly with the spline housing, the motor and a household appliance.
Background
The existing spline housing for the motor rotor is a hexagonal spline housing, the spline housing has low torsional strength after injection molding, can bear smaller torque, has lower waiting load capacity during long-term operation, and has short service life.
Disclosure of Invention
The first object of the present invention is to provide a spline housing for a motor, which can increase the reliability of the combination of the spline housing and a rotor after plastic packaging.
A second object of the present invention is to provide a rotor assembly having the spline housing described above.
A third object of the present invention is to provide an electric machine having the spline housing described above.
A fourth object of the present invention is to provide a household appliance having the above motor.
In order to achieve the first object, the invention provides a spline housing for an electric motor, which comprises a spline housing body, injection molding teeth and an axial positioning piece, wherein the spline housing body is cylindrical, the injection molding teeth are arranged on the peripheral wall of the spline housing body, the axial positioning piece extends along the radial direction of the spline housing body from the peripheral wall of the spline housing body to the direction away from the peripheral wall, the minimum distance between the edge of the axial positioning piece and the central shaft of the spline housing body is larger than the maximum distance between the injection molding teeth and the central shaft of the spline housing body, a plurality of through holes are formed in the axial positioning piece and are arranged along the circumferential direction of the axial positioning piece, and the through holes penetrate through the axial positioning piece along the axial direction parallel to the spline housing body.
In a preferred embodiment, the axial positioning member is disposed in an axial middle portion of the spline housing body.
The further scheme is that the injection molding teeth comprise a first injection molding tooth and a second injection molding tooth which are respectively arranged at two sides of the axial positioning piece.
In a further embodiment, a first injection-molded tooth is arranged opposite a second injection-molded tooth.
Still further scheme is, a plurality of through-holes include a plurality of first through-holes and a plurality of second through-hole, and first through-hole and second through-hole interval set up, and a tooth of moulding plastics corresponds the setting with a first through-hole, and first through-hole is located the tooth of moulding plastics and keeps away from one side of spline housing body, and the second through-hole is located between two teeth of moulding plastics in the circumference of spline housing.
The diameter of the circle formed by the circle centers of the first through holes is larger than that of the circle formed by the circle centers of the second through holes.
In a preferred embodiment, the first injection molding teeth are arranged offset from the second injection molding teeth.
In a preferred embodiment, the number of injection molding teeth is not less than four, and the plurality of injection molding teeth are uniformly arranged along the circumferential direction of the spline housing body.
In a preferred embodiment, the thickness of the injection molded teeth is not less than one third of the thickness of the spline housing body.
In a preferred embodiment, the axial positioning element has a thickness equal to one third of the thickness of the injection-molded tooth.
In a preferred embodiment, the radial cross section of the injection molded tooth is rectangular or trapezoidal or arcuate or fan-shaped.
In order to achieve the second object, the invention provides a rotor assembly, which comprises a rotor and the spline housing for the motor, wherein the spline housing is positioned in the rotor and is coaxially arranged with the rotor.
The rotor assembly further comprises a rotating shaft, an assembly hole is formed in the center of the spline housing body, a plurality of tooth grooves are formed in the inner peripheral wall of the spline housing body, and the rotating shaft is arranged in the assembly hole in a penetrating mode and is connected with the tooth grooves in a matching mode.
To achieve the third object, the present invention provides an electric machine, including a stator assembly and the rotor assembly.
To achieve the fourth object, the present invention provides a household appliance, which includes the motor.
The spline sleeve has the beneficial effects that the axial positioning piece is arranged on the peripheral wall of the spline sleeve body, so that the contact surface between the spline sleeve and the rotor can be increased, and the spline sleeve and the rotor can be more firmly contacted in the axial direction. In addition, the axial locating piece sets up at spline housing body axial middle part, and during the injection molding, the spline housing is inlayed inside the rotor, can play the spacing effect of axial, strengthens spline housing and rotor overall structure's intensity simultaneously. In addition, when the number of the injection molding teeth is small, the internal stress of the spline housing is concentrated when the rotor runs at a high speed, so that the service life of the rotor is influenced. Simultaneously, the injection molding teeth can also play a role in circumferential positioning, so that the spline housing and the rotor are prevented from being separated when the motor works. The through hole is formed in the axial positioning piece, so that the contact area between the through hole and the plastic packaging material can be increased, the stress area is increased, the integral bonding strength of the spline housing and the rotor is improved, and meanwhile, the through hole plays a role of a flow through hole in injection molding.
Drawings
Fig. 1 is a structural view of an embodiment of a washing machine of the present invention.
Fig. 2 is a partial enlarged view at a in fig. 1.
FIG. 3 is a block diagram of an embodiment of a rotor assembly of the present invention.
Fig. 4 is an exploded view of an embodiment of the rotor assembly of the present invention.
FIG. 5 is a block diagram of a first view of a spline housing in an embodiment of a rotor assembly according to the present invention.
FIG. 6 is a block diagram of a second view of a spline housing in an embodiment of a rotor assembly according to the present invention.
FIG. 7 is a block diagram of a third view of a spline housing in an embodiment of a rotor assembly according to the present invention.
The invention is further described below with reference to the drawings and examples.
Detailed Description
The household appliance of the embodiment is a washing machine, and because the washing machine adopts the spline housing, the rotor assembly and the motor, the description of the embodiment of the washing machine comprises the description of the embodiment of the spline housing, the embodiment of the rotor assembly and the embodiment of the motor. The spline housing, the rotor assembly and the motor are not limited to be applied to washing machines, but can be applied to other household appliances, and the main purpose is to increase the reliability of the combination of the spline housing and the rotor after plastic packaging.
Referring to fig. 1, the washing machine includes a washing machine body 1 and a motor drivingly connected with a drum in the washing machine body 1 and adapted to drive the drum to rotate, the motor including a stator assembly 101 and a rotor assembly 102, the stator assembly 101 being located inside the rotor assembly 102.
Referring to fig. 2 to 7, the rotor assembly 102 includes a rotor 2, a spline housing 3, and a rotating shaft 4, the spline housing 3 being located within the rotor 2 and disposed coaxially with the rotor 2. The spline housing 3 comprises an integrally formed spline housing body 31, injection molding teeth 32 and an axial positioning piece 33, the spline housing body 31 is cylindrical, an assembly hole 311 is formed in the center of the spline housing body 31, a plurality of tooth grooves 312 are formed in the inner peripheral wall of the spline housing body 31, and a rotating shaft 4 is arranged in the assembly hole 311 in a penetrating mode and is connected with the tooth grooves 312 in a matching mode. The injection molding teeth 32 are provided on the outer peripheral wall of the spline housing body 31, and the thickness h1 of the injection molding teeth 32 is not less than one third of the thickness h2 of the spline housing body 31. The number of the injection molding teeth 32 is not less than four, and the plurality of injection molding teeth 32 are uniformly arranged along the circumferential direction of the spline housing body 31. Preferably, the number of injection molded teeth 32 in this embodiment is 12. The radial cross-section of the injection molded teeth 32 may be rectangular or trapezoidal or arcuate or polygonal or fan-shaped, etc.
The injection molding teeth 32 include first injection molding teeth 321 and second injection molding teeth 322 respectively provided at both sides of the axial positioning member 33. The number of the first injection molding teeth 321 and the number of the second injection molding teeth 322 are equal, and one first injection molding tooth 321 is arranged opposite to one second injection molding tooth 322. Furthermore, in other embodiments, the first injection molding teeth 321 and the second injection molding teeth 322 may be arranged in a staggered manner, specifically, in an axial direction parallel to the spline housing body 31, a gap between the first injection molding teeth 321 and two adjacent second injection molding teeth 322 is disposed opposite.
The axial positioning piece 33 is arranged at the axial middle part of the spline housing body 31, and the thickness h3 of the axial positioning piece 33 is equal to one third of the thickness h1 of the injection molding tooth 32. The axial positioning member 33 extends from the outer peripheral wall of the spline housing body 31 in the radial direction of the spline housing body 31 in a direction away from the outer peripheral wall, the minimum distance between the edge of the axial positioning member 33 and the central axis of the spline housing body 31 is larger than the maximum distance between the injection molding teeth 32 and the central axis of the spline housing body 31, since the axial positioning member 33 is substantially annular in shape in this embodiment, the outer diameter d1 of the axial positioning member 33 is larger than the circular diameter d5 formed by the outer peripheral wall of the injection molding teeth 32, and the outer diameter d1 of the axial positioning member 33 is smaller than three times the inner diameter d2 of the spline housing body 31. The radial cross-section of the axial positioning member 33 may have other shapes such as a polygon.
The axial positioning member 33 is provided with a plurality of through holes arranged along the circumferential direction of the axial positioning member 33, and the through holes penetrate the axial positioning member 33 along the axial direction parallel to the spline housing body 31.
The plurality of through holes comprise a plurality of first through holes 331 and a plurality of second through holes 332, the first through holes 331 and the second through holes 332 are arranged at intervals, one first injection molding tooth 321 and one first through hole 331 are correspondingly arranged, the first through holes 331 are positioned on one side, away from the spline housing body 31, of the first injection molding tooth 321, and the second through holes 332 are positioned between the two first injection molding teeth 321 in the circumferential direction of the spline housing 3. The diameter d3 of the circle formed by the centers of the first through holes 331 is larger than the diameter d4 of the circle formed by the centers of the second through holes 332, so that the first through holes 331 and the second through holes 332 are arranged in a staggered arrangement mode, more through holes can be arranged on the axial positioning piece 33, the contact area of the spline housing 3 and the rotor 2 is increased, and the integral strength of the spline housing 3 can be ensured.
From the above, the axial positioning piece is arranged on the peripheral wall of the spline housing body, so that the contact surface between the spline housing and the rotor can be increased, and the axial contact between the spline housing and the rotor is firmer. In addition, the axial locating piece sets up at spline housing body axial middle part, and during the injection molding, the spline housing is inlayed inside the rotor, can play the spacing effect of axial, strengthens spline housing and rotor overall structure's intensity simultaneously. In addition, when the number of the injection molding teeth is small, the internal stress of the spline housing is concentrated when the rotor runs at a high speed, so that the service life of the rotor is influenced. Simultaneously, the injection molding teeth can also play a role in circumferential positioning, so that the spline housing and the rotor are prevented from being separated when the motor works. The through hole is formed in the axial positioning piece, so that the contact area between the through hole and the plastic packaging material can be increased, the stress area is increased, the integral bonding strength of the spline housing and the rotor is improved, and meanwhile, the through hole plays a role of a flow through hole in injection molding.
Finally, it should be noted that, if a person skilled in the art is informed by the foregoing disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present invention, and the structural manner and the embodiment fall within the protection scope of the claims of the present invention.
Claims (13)
1. Spline housing for an electric machine, comprising
The spline housing body is cylindrical;
the spline housing is characterized by further comprising:
the injection molding teeth are arranged on the outer peripheral wall of the spline housing body;
the axial positioning piece is annular, extends from the outer peripheral wall of the spline housing body to a direction away from the outer peripheral wall along the radial direction of the spline housing body, is arranged in the axial middle of the spline housing body, has a minimum distance between the edge of the axial positioning piece and the central axis of the spline housing body greater than a maximum distance between the injection molding tooth and the central axis of the spline housing body, and is provided with a plurality of through holes arranged along the circumferential direction of the axial positioning piece, and the through holes penetrate through the axial positioning piece along the axial direction parallel to the spline housing body;
the injection molding teeth comprise first injection molding teeth and second injection molding teeth which are respectively arranged on two sides of the axial positioning piece.
2. The spline housing of claim 1, wherein:
one of the first injection molding teeth is arranged opposite to one of the second injection molding teeth.
3. The spline housing of claim 2, wherein:
the through holes comprise a plurality of first through holes and a plurality of second through holes, the first through holes are arranged at intervals with the second through holes, one first injection molding tooth is arranged corresponding to the first through holes, the first through holes are located at one side, away from the spline housing body, of the first injection molding tooth, and the second through holes are located between the two first injection molding teeth in the circumferential direction of the spline housing.
4. A spline housing according to claim 3, wherein:
the diameter of a circle formed by the circle centers of the plurality of first through holes is larger than that of a circle formed by the circle centers of the plurality of second through holes.
5. The spline housing of claim 1, wherein:
the first injection molding teeth and the second injection molding teeth are arranged in a staggered manner.
6. The spline housing according to any one of claims 1 to 5, wherein:
the number of the injection molding teeth is not less than four, and a plurality of the injection molding teeth are arranged along the circumference of the spline housing body.
7. The spline housing according to any one of claims 1 to 5, wherein:
the thickness of the injection molding teeth is not less than one third of the thickness of the spline housing body.
8. The spline housing according to any one of claims 1 to 5, wherein:
the thickness of the axial positioning piece is equal to one third of the thickness of the injection molding tooth.
9. The spline housing according to any one of claims 1 to 5, wherein:
the radial section of the injection molding tooth is rectangular or trapezoid or arched or fan-shaped.
10. A rotor assembly comprising a rotor and a spline housing for an electric machine according to any one of claims 1 to 9, said spline housing being located within and coaxially disposed with said rotor.
11. The rotor assembly as recited in claim 10, wherein:
the rotor assembly further comprises a rotating shaft, an assembly hole is formed in the center of the spline housing body, a plurality of tooth grooves are formed in the inner peripheral wall of the spline housing body, and the rotating shaft penetrates through the assembly hole and is connected with the tooth grooves in a matched mode.
12. An electric machine comprising a stator assembly and a rotor assembly, the rotor assembly being as claimed in claim 10 or 11.
13. A household appliance comprising the motor of claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811091093.8A CN108916255B (en) | 2018-09-19 | 2018-09-19 | Spline housing for motor, rotor assembly, motor and household appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811091093.8A CN108916255B (en) | 2018-09-19 | 2018-09-19 | Spline housing for motor, rotor assembly, motor and household appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108916255A CN108916255A (en) | 2018-11-30 |
| CN108916255B true CN108916255B (en) | 2023-08-22 |
Family
ID=64409145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811091093.8A Active CN108916255B (en) | 2018-09-19 | 2018-09-19 | Spline housing for motor, rotor assembly, motor and household appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108916255B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0300596A1 (en) * | 1987-07-22 | 1989-01-25 | Concentric Pumps Limited | Water pump impeller |
| CN203278429U (en) * | 2013-06-03 | 2013-11-06 | 浙江三星机电股份有限公司 | External rotor of direct-drive (DD) motor |
| CN105179833A (en) * | 2015-08-07 | 2015-12-23 | 佛山市日丰企业有限公司 | Connecting pipe fitting with metal insert |
| CN206666857U (en) * | 2017-02-28 | 2017-11-24 | 青岛海尔滚筒洗衣机有限公司 | A kind of axle sleeve and washing machine |
| CN208778518U (en) * | 2018-09-19 | 2019-04-23 | 珠海格力电器股份有限公司 | Spline housing for motor, rotor assembly, motor and household appliance |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9780610B2 (en) * | 2014-04-14 | 2017-10-03 | Asmo Co., Ltd. | Rotor and motor |
-
2018
- 2018-09-19 CN CN201811091093.8A patent/CN108916255B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0300596A1 (en) * | 1987-07-22 | 1989-01-25 | Concentric Pumps Limited | Water pump impeller |
| CN203278429U (en) * | 2013-06-03 | 2013-11-06 | 浙江三星机电股份有限公司 | External rotor of direct-drive (DD) motor |
| CN105179833A (en) * | 2015-08-07 | 2015-12-23 | 佛山市日丰企业有限公司 | Connecting pipe fitting with metal insert |
| CN206666857U (en) * | 2017-02-28 | 2017-11-24 | 青岛海尔滚筒洗衣机有限公司 | A kind of axle sleeve and washing machine |
| CN208778518U (en) * | 2018-09-19 | 2019-04-23 | 珠海格力电器股份有限公司 | Spline housing for motor, rotor assembly, motor and household appliance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108916255A (en) | 2018-11-30 |
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