CN219513939U - Filling and sealing die for assembling stator of slotless brushless direct current motor - Google Patents
Filling and sealing die for assembling stator of slotless brushless direct current motor Download PDFInfo
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- CN219513939U CN219513939U CN202320316649.9U CN202320316649U CN219513939U CN 219513939 U CN219513939 U CN 219513939U CN 202320316649 U CN202320316649 U CN 202320316649U CN 219513939 U CN219513939 U CN 219513939U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The utility model belongs to the technical field of permanent magnet direct current motors, and relates to a potting mold for assembling a stator of a slotless brushless direct current motor, which comprises a base, a mandrel assembly and a cover plate; the cover plate is made of polyether-ether-ketone material, so that the problem of damage to the outgoing line is solved, and the problems of thermal expansion, extrusion death of the shell and difficult demolding due to adhesion with the potting material are avoided according to the thermal stability and self-lubricity of the material; a wire outlet groove is prefabricated on the outer side surface of the cover plate; the wire outlet mode is changed into radial wire outlet, so that the problems of material leakage and difficult cleaning of the adhesive materials of the outgoing wires are solved; the mandrel assembly comprises a positioning mandrel, a mandrel outer sleeve and a mandrel pressing sleeve, wherein the mandrel pressing sleeve is sleeved on the upper half part of the positioning mandrel, and the mandrel outer sleeve is sleeved on the lower half part of the positioning mandrel; the mandrel outer sleeve is made of polytetrafluoroethylene material; the mandrel is changed into a mandrel assembly, and different materials are adopted, so that the matching precision and the demolding problem are both considered.
Description
Technical Field
The utility model belongs to the technical field of permanent magnet direct current motors, and particularly relates to a potting mold for assembling a stator of a slotless brushless direct current motor.
Background
The slotless brushless permanent magnet DC motor is an assembled structure and mainly comprises a rotor, a stator assembly and a rear end cover assembly. The stator assembly of the slotless brushless permanent magnet direct current motor consists of a shell 1, an iron core 3, a stator winding 2, an insulating plate 4, an outgoing line 6 and a potting material 5 (as shown in figure 1), and in order to achieve better insulativity and assembly reliability, the potting material 5 for stator assembly is subjected to insulation treatment by adopting a vacuum potting method.
The iron core 3 of the slotless brushless permanent magnet direct current motor adopts an annular slotless structure, the stator winding 2 is made into a cup shape and is adhered on the inner circle of the iron core, insulation is carried out between the stator winding and the iron core 3 by using an insulating plate 4, and the motor structure is called a hollow cup structure. The winding structure adopts a straight winding form, the winding coil is parallel to the axis of the motor, the two ends of the winding coil are high in size due to more overlapped layers, the middle part of the winding coil is thin in wall, the strength of the winding cup is enhanced through encapsulation, and meanwhile, the whole winding cup has reliable insulation property.
The cover plate 7 in the filling and sealing die is made of metal, an axial circular wire outlet groove is formed in the filler part and is parallel to the central hole, the wire outlet 6 is led out of the wire outlet groove during installation, the root of the wire outlet 6 is easily damaged at the position of the wire outlet groove hole, the wire outlet groove is plugged by silica gel, the problem of material leakage is still avoided, the residual materials are adhered to the wire outlet 6 and are difficult to clean, and the wire outlet 6 is easily damaged during cleaning of the residual materials. The cover plate 7 is arranged to be matched with the inner hole of the shell 1, so that the metal material is easy to be squeezed with the inner hole of the shell 1 when being heated and expanded, and is extremely difficult to detach. The metal material is easy to adhere with the potting material 5, and the potting material 5 is not easy to be demolded or is carried during demolding after solidification, so that the surface of the potting material is defective.
The mandrel in the filling and sealing die is made of metal, is easy to adhere with the filling and sealing material 5, and is difficult to demould, or the strip material causes the stator assembly inner hole to be defective and scrapped during demoulding.
The problem of damage to the strip material and the outgoing line 6 during demolding makes the stator assembly and encapsulation failure rate higher, and the problem of cleaning the die adhesive material and the outgoing line slot leakage seriously influences the stator assembly and encapsulation efficiency.
Disclosure of Invention
The utility model aims to provide a potting mold for assembling a stator of a slotless brushless direct current motor, which solves the problem of damage to a belt material and an outgoing line during demolding.
The utility model is realized by the following technical scheme:
a pouring mold for assembling a stator of a slotless brushless DC motor comprises a base, a mandrel assembly and a cover plate;
the base is arranged at one end of the assembly of the stator of the slotless brushless DC motor, the cover plate is arranged at the other end of the assembly of the stator of the slotless brushless DC motor, and the mandrel assembly is arranged in an inner cavity of the assembly of the stator of the slotless brushless DC motor;
the mandrel assembly comprises a positioning mandrel, a mandrel outer sleeve and a mandrel pressing sleeve, wherein the mandrel pressing sleeve is sleeved on the upper half part of the positioning mandrel, and the mandrel outer sleeve is sleeved on the lower half part of the positioning mandrel;
the mandrel outer sleeve is made of polytetrafluoroethylene material;
the base is fixedly connected with the positioning mandrel;
the cover plate is sleeved outside the mandrel jacket, and a wire outlet groove is prefabricated on the outer side surface of the cover plate;
the cover plate is made of polyether-ether-ketone material.
Further, the positioning mandrel is a stepped shaft and comprises a connecting section, a middle section and a top section which are sequentially connected from bottom to top, the diameters of the connecting section, the middle section and the top section are from large to small, and the connecting section is connected with the base.
Further, the positioning mandrel is made of No. 45 steel.
Further, the mandrel sleeve is made of No. 45 steel.
Further, a threaded hole is prefabricated in the bottom of the positioning mandrel, and a screw is installed in the threaded hole.
Further, the cover plate is internally provided with a conical hole and a cylindrical hole, and the diameter of the cylindrical hole is larger than that of the mandrel jacket, so that an inlet for filling and sealing materials is formed.
Further, a stepped hole for installing a screw is formed in the base.
Further, the mandrel jacket is in clearance fit with a stator winding assembled by a stator of the slotless brushless DC motor and is used for filling potting material.
Further, the cover plate comprises a first section and a second section which are integrally connected, and the outer diameter of the first section is smaller than that of the second section;
the wire outlet groove comprises a vertical groove and a horizontal groove which are vertically connected, the vertical groove is formed in the outer wall of the first section, and the horizontal groove is formed in the horizontal end face of the second section.
Compared with the prior art, the utility model has the following beneficial technical effects:
the utility model discloses a pouring mold for assembling a stator of a slotless brushless direct current motor, which is characterized in that a mandrel of the existing tool is changed into a mandrel assembly, the mandrel assembly comprises a positioning mandrel, a mandrel jacket and a mandrel pressing sleeve, and the mandrel jacket contacted with a pouring material is made of polytetrafluoroethylene material, so that the pouring mold has high lubricating non-viscosity, the problem that the surface defect of a workpiece is difficult to demould after solidification or caused after demoulding can be avoided, the time for cleaning the residual materials is saved, and the production efficiency and the qualification rate can be effectively improved; the cover plate of the existing tool is changed into a polyether-ether-ketone material, so that the lead-out wire is not easy to damage, and the problems of thermal expansion and casing extrusion of the tool and difficult demoulding are avoided by utilizing the characteristics of small thermal expansion coefficient and good dimensional stability; meanwhile, the material has better self-lubricating property, is not easy to adhere to the potting material and is easy to demould; the outlet groove on the cover plate is improved, and the problems of material leakage and material sticking are avoided. The problems of difficult demolding and material sticking during demolding are solved, the problems of lead wire damage and material leakage cleaning are avoided, and the potting efficiency and the qualification rate are improved.
Furthermore, the positioning mandrel is a stepped shaft, the mandrel outer sleeve and the mandrel pressing sleeve can be clamped on the positioning mandrel, and the connection stability of the mandrel outer sleeve and the mandrel pressing sleeve is guaranteed.
Further, according to the application, different materials are adopted for processing, the positioning mandrel is made of 45 # steel, the dimensional accuracy matched with the bearing chamber is high, and the metal material processing is convenient to meet the accuracy requirement.
Further, the mandrel pressing sleeve is made of 45 steel and is in threaded connection with the positioning mandrel, and the main function is to press the mandrel sleeve into the positioning mandrel, so that three parts are combined into a whole.
Drawings
FIG. 1 is a schematic diagram of the stator assembly of a slotless brushless permanent magnet DC motor of the present utility model;
wherein: 1. a housing; 2. a stator winding; 3. an iron core; 4. an insulating plate; 5. filling and sealing materials; 6. a lead-out wire;
FIG. 2 is a schematic diagram of a stator assembly potting mold of the present utility model;
wherein: 7. a cover plate; 8. a mandrel assembly; 9. a base; 10. a screw;
FIG. 3 is a schematic view of a base structure of the present utility model;
wherein: 91. a stepped hole;
FIG. 4 is a schematic view of a mandrel assembly according to the present utility model;
wherein: 11. a mandrel press sleeve; 12. positioning a mandrel; 13. a mandrel coat;
FIG. 5 is a schematic view of the structure of the cover plate of the present utility model;
FIG. 6 is a bottom view of FIG. 5;
wherein: 71. a first section; 72. a second section; 73. a vertical slot; 74. a horizontal trough.
Detailed Description
The objects, technical solutions and advantages of the present utility model will be more apparent from the following detailed description with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model.
The components illustrated in the figures and described and shown in the embodiments of the utility model may be arranged and designed in a wide variety of different configurations, and thus the detailed description of the embodiments of the utility model provided in the figures below is not intended to limit the scope of the utility model as claimed, but is merely representative of selected ones of the embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model, based on the figures and embodiments of the present utility model.
It should be noted that: the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, element, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, element, method, article, or apparatus. Furthermore, the terms "horizontal" and "vertical" are based on the orientation and positional relationship of the devices or components shown in the drawings, and are merely used to better describe the present utility model, and do not require that the devices, components or apparatus shown must have this particular orientation and therefore should not be construed as limiting the present utility model.
The features and properties of the present utility model are described in further detail below with reference to examples.
As shown in fig. 2, the utility model discloses a potting mold for assembling a stator of a slotless brushless direct current motor, which comprises a base 9, a mandrel assembly 8, a cover plate 7 and screws 10.
As shown in fig. 3, the base 9 is internally provided with a stepped hole 91 for mounting the screw 10. The base 9 is processed by No. 45 steel, the base 9 is positioned with the spigot of the shell 1, and the support fixing mandrel assembly 8 and the stator are assembled.
As shown in fig. 4, the mandrel assembly 8 includes a positioning mandrel 12, a mandrel jacket 13, and a mandrel press jacket 11, the mandrel press jacket 11 being disposed on an upper half of the positioning mandrel 12, and the mandrel jacket 13 being disposed on a lower half of the positioning mandrel 12.
The positioning mandrel 12 is processed by No. 45 steel, so that better precision can be achieved, and the positioning mandrel is positioned with a stator assembly bearing chamber, so that coaxiality of the mandrel assembly 8 and stator assembly is ensured, and a gap between the mandrel assembly 8 and an inner hole of stator assembly is uniform. The positioning mandrel 12 is provided with a threaded hole, so that the mandrel assembly 8, the stator assembly and the base 9 can be fastened into a whole by using the screw 10, and the filling and sealing operation is facilitated. The mandrel jacket 13 is made of polytetrafluoroethylene material, and the polytetrafluoroethylene material has the characteristic of high lubrication and non-viscosity, is used as a part in direct contact with the potting material 5, and is non-adhesive after potting and easy to demould. The mandrel pressing sleeve 11 is made of 45-gauge steel and is in threaded connection with the positioning mandrel 12, and is mainly used for pressing the mandrel outer sleeve 13 into the positioning mandrel 12 to combine three parts into a whole.
The cover plate 7 is made of PEEK, is engineering plastic, has excellent comprehensive performance, is not easy to damage enameled wires, has excellent heat resistance, and can be used at 240 ℃ continuously; the high-toughness and rigidity composite material has the advantages of good toughness and rigidity, small thermal expansion coefficient, good dimensional stability and small dimensional change of parts along with temperature change; has better self-lubricating property, does not adhere to the potting material 5, and is easy to demould after the potting is completed.
As shown in fig. 5, the cover plate 7 includes a first section 71 and a second section 72 integrally connected, the first section 71 having an outer diameter smaller than that of the second section 72; the outlet slot comprises a vertical slot 73 and a horizontal slot 74 which are vertically connected, wherein the vertical slot 73 is formed in the outer wall of the first section 71, and the horizontal slot 74 is formed in the horizontal end face of the second section 72.
The wire outlet grooves on the cover plate 7 are led out radially from the side face of the cover plate 7, so that leakage and sticking caused by contact between wires from the filler position and the potting material 5 are avoided, the efficiency is improved, and damage to the wire skin of the outgoing wire 6 caused by cleaning the excess materials is avoided.
During filling and sealing, assembling the stator into the base 9, and matching the spigot on the shell 1 with the base 9; silicone grease is coated on the mandrel jacket 13, the mandrel assembly 8 is installed in the stator winding 2, the positioning mandrel 12 is matched with the bearing chamber of the shell 1, and the mandrel assembly 8 is fastened with the base 9 by the bolts 10. And (3) coating silicone grease on the bottom surface and the inner hole of the cover plate 7, leading out the outgoing line 6 from the position of the outgoing line groove of the cover plate 7, matching the cover plate 7 with the inner hole of the shell 1, and loading the cover plate 7.
And (3) placing the encapsulation mould assembled with the stator into a drying box with circulating ventilation for preheating. And (3) fully and uniformly stirring the epoxy type heat-conducting encapsulating material, placing the encapsulating material into a vacuum drying oven, vacuumizing to eliminate bubbles in the encapsulating material, immediately filling the encapsulating material into a preheated die and a workpiece after the encapsulating material is processed, vacuumizing again, so that the encapsulating material can be filled into all gaps in a die cavity as much as possible, and finally heating and curing. After encapsulation, the stator winding 2 and the iron core 3 are wrapped into a whole by the encapsulating material 5, so that the strength of the winding is increased, and the whole winding is reliably insulated.
The filling and sealing die solves the problems that the die is adhered to the filling and sealing material 5 in the filling and sealing process, the die is difficult to demould after solidification, the lead-out wires 6 are damaged in the die mounting process and the like, and the surface of a workpiece is smooth and has no material shortage phenomenon after filling and sealing by adopting the novel die, so that the filling and sealing qualification rate is improved, the time for cleaning the residual materials after filling and sealing is saved, and the filling and sealing efficiency is obviously improved.
The utility model is successfully applied to the slotless brushless permanent magnet direct current motor with various direct winding structures through multiple production verification, so that the stator assembly, encapsulation and processing efficiency of the motor is improved obviously, and the qualification rate of the stator assembly, encapsulation and processing is improved obviously.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the utility model without departing from the spirit and scope of the utility model, which is intended to be covered by the claims.
Claims (9)
1. The pouring mold for assembling the stator of the slotless brushless direct current motor is characterized by comprising a base (9), a mandrel assembly (8) and a cover plate (7);
the base (9) is arranged at one end of the assembly of the stator of the slotless brushless direct current motor, the cover plate (7) is arranged at the other end of the assembly of the stator of the slotless brushless direct current motor, and the mandrel assembly (8) is arranged in an inner cavity of the assembly of the stator of the slotless brushless direct current motor;
the mandrel assembly (8) comprises a positioning mandrel (12), a mandrel jacket (13) and a mandrel pressing sleeve (11), wherein the mandrel pressing sleeve (11) is sleeved on the upper half part of the positioning mandrel (12), and the mandrel jacket (13) is sleeved on the lower half part of the positioning mandrel (12);
the mandrel jacket (13) is made of polytetrafluoroethylene material;
the base (9) is fixedly connected with the positioning mandrel (12);
the cover plate (7) is sleeved outside the mandrel jacket (13), and a wire outlet groove is prefabricated on the outer side surface of the cover plate (7);
the cover plate (7) is made of polyether-ether-ketone material.
2. The potting mold for assembling a stator of a slotless brushless direct current motor according to claim 1, wherein the positioning mandrel (12) is a stepped shaft, and comprises a connecting section, a middle section and a top section which are sequentially connected from bottom to top, the diameters of the connecting section, the middle section and the top section are from large to small, and the connecting section is connected with the base (9).
3. The potting mold for assembling a stator of a slotless brushless dc motor according to claim 1, wherein the positioning mandrel (12) is made of steel No. 45.
4. The potting mold for assembling a stator of a slotless brushless dc motor according to claim 1, wherein the mandrel press (11) is made of steel No. 45.
5. The potting mold for assembling a stator of a slotless brushless dc motor according to claim 1, wherein a threaded hole is prefabricated at the bottom end of the positioning mandrel (12), and a screw (10) is installed in the threaded hole.
6. The potting mold for assembling a stator of a slotless brushless dc motor according to claim 1, wherein the cover plate (7) has a tapered hole and a cylindrical hole formed therein, the cylindrical hole having a diameter larger than that of the mandrel housing (13) to form an inlet for potting material (5).
7. The potting mold for stator assembly of a slotless brushless dc motor according to claim 1, wherein the base (9) is internally provided with stepped holes (91) for mounting screws (10).
8. A potting mould for the assembly of a stator of a slotless brushless dc motor according to claim 1, wherein the mandrel sleeve (13) is in clearance fit with the stator windings (2) of the stator assembly of the slotless brushless dc motor for filling the potting compound (5).
9. The potting mold for stator assembly of a slotless brushless dc motor according to claim 1, wherein the cover plate (7) comprises a first section (71) and a second section (72) integrally connected, the first section (71) having an outer diameter smaller than the outer diameter of the second section (72);
the wire outlet groove comprises a vertical groove (73) and a horizontal groove (74) which are vertically connected, the vertical groove (73) is formed in the outer wall of the first section (71), and the horizontal groove (74) is formed in the horizontal end face of the second section (72).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320316649.9U CN219513939U (en) | 2023-02-24 | 2023-02-24 | Filling and sealing die for assembling stator of slotless brushless direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320316649.9U CN219513939U (en) | 2023-02-24 | 2023-02-24 | Filling and sealing die for assembling stator of slotless brushless direct current motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219513939U true CN219513939U (en) | 2023-08-11 |
Family
ID=87531810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320316649.9U Active CN219513939U (en) | 2023-02-24 | 2023-02-24 | Filling and sealing die for assembling stator of slotless brushless direct current motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219513939U (en) |
-
2023
- 2023-02-24 CN CN202320316649.9U patent/CN219513939U/en active Active
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