Mechanical device, and brushless motor and stator assembly thereof

Abstract

The application discloses a mechanical device, a brushless motor and a stator assembly thereof, and belongs to the technical field of mechanical devices.The mechanical device comprises a brushless motor, and the brushless motor comprises a stator assembly, wherein the stator assembly comprises a winding assembly and a wire pressing plate.The winding assembly comprises a plurality of stator coils, and adjacent stator coils are separated by a predetermined gap to form a wire slot.The wire pressing plate is made of insulating material, and the wire pressing plate comprises a plate body, and the plate body extends a plurality of wire pressing columns.The wire pressing columns extend into the wire slot to press the stator coils on both sides of the wire slot.The wire pressing plate has the advantages of simple structure, easy production and low production cost.The wire pressing columns can better press the stator coils to prevent the wires from being loose, and the overall production of the stator assembly is simpler, the production efficiency can be greatly improved, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to motor technology, and more particularly to a mechanical device and its brushless motor and stator assembly. Background Technology

[0002] Currently, the production process of motor stators is extremely complex, time-consuming, labor-intensive, inefficient, and costly. It includes the following steps:

[0003] a) After the stator winding is completed and the phase wires are led out, the phase wires must be tightened to prevent them from becoming loose. In addition, several enameled wires should be twisted together into a braid to facilitate the subsequent application of heat shrink tubing.

[0004] b) Place the heat shrink tubing on the twisted phase line, blow hot air into the heat gun, and tighten the heat shrink tubing onto the fixed phase line.

[0005] c) Use cable ties to pre-fix the phase wires in the corresponding positions.

[0006] d) Apply glue to the phase wire to fix it in place.

[0007] e) Baking the glue: Baking the glue to make it solidify.

[0008] f) Cut the cable ties. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a mechanical device and its brushless motor and stator assembly.

[0010] The technical solution adopted by the present invention to solve its technical problem is: to construct a stator assembly, including a winding assembly and a pressure plate, wherein the winding assembly includes a plurality of stator coils, and adjacent stator coils are separated by a predetermined gap to form a wire groove;

[0011] The pressure plate is made of insulating material. The pressure plate includes a plate body, and the plate body extends with a plurality of pressure posts. The pressure posts extend into the wire groove to press the stator coils on both sides of the wire groove.

[0012] In some embodiments, each of the pressure posts includes a plurality of pressure portions, which are arranged together at a central interval around the pressure post.

[0013] In some embodiments, at least two of the plurality of pressure sections are arranged facing the stator coils on both sides of the wire groove.

[0014] In some embodiments, the plurality of pressure lines includes three pressure lines, with any one pressure line facing the gap between the other two pressure lines.

[0015] In some embodiments, the cross-section of the pressure line is one of a rectangle, an arc, and a semicircle.

[0016] In some embodiments, the wire pressing column is provided with a guide structure away from one side of the plate body.

[0017] In some embodiments, the wire winding assembly comprises a stator core and a bobbin matched with the stator core; the stator coil is wound on the stator core and the bobbin.

[0018] The plate body and the bobbin are matched and installed through a positioning structure.

[0019] In some embodiments, the positioning structure comprises a positioning hole provided on the plate body and a positioning column provided on the bobbin to be inserted into the positioning hole.

[0020] And / or, the positioning structure comprises a positioning slot provided on the plate body and a positioning part provided on the bobbin to be inserted into the positioning slot.

[0021] In some embodiments, the bobbin comprises a first bobbin and a second bobbin matched and installed at both ends of the stator core.

[0022] The positioning column and / or the positioning part are provided on the first bobbin.

[0023] In some embodiments, the first bobbin comprises a first annular part and a first sleeve part provided on the first annular part.

[0024] The positioning column and / or the positioning part are provided on the first annular part and / or the first sleeve part.

[0025] In some embodiments, the plate body and the bobbin are fixed together through hot melt riveting.

[0026] In some embodiments, the plate body is further provided with a plurality of glue dropping holes.

[0027] In some embodiments, the plate body is further provided with an outlet for leading out phase lines connected with the stator coil.

[0028] In some embodiments, the wire pressing plate is a plastic part.

[0029] In some embodiments, the cross-sectional dimension of the wire pressing column in the initial state is slightly larger than the cross-sectional dimension of the wire slot.

[0030] The present application also provides a brushless motor comprising the stator assembly of any one of the above embodiments and a rotor assembly matched and installed with the stator assembly.

[0031] In some embodiments, a through hole is provided in the middle of the plate body for the rotation shaft of the rotor assembly to extend out.

[0032] The application further provides a mechanical device comprising the brushless motor.

[0033] The stator assembly of the application has the following advantages: the stator assembly comprises a winding assembly and a wire pressing plate, the winding assembly comprises a plurality of stator coils, adjacent stator coils are separated by a predetermined gap to form a wire slot, and the wire pressing plate is made of insulating material and comprises a plate body extending with a plurality of wire pressing columns, which extend into the wire slot to press the stator coils on both sides of the wire slot. The wire pressing plate has a simple structure, is easy to produce and has low production cost, and the wire pressing columns can better press the stator coils to prevent the wires from loosening, so that the overall production of the stator assembly is simpler, the production efficiency is greatly improved, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the present application, the present application will be further described below in conjunction with the drawings and examples. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings:

[0035] Figure 1 is a front structure schematic diagram of the stator assembly in some embodiments of the present application;

[0036] Figure 2 is a bottom structure schematic diagram of the stator assembly in some embodiments of the present application;

[0037] Figure 3 is an exploded view of the stator assembly in some embodiments of the present application; Figure 1

[0038] Figures 4 to 5 is a structure schematic diagram of the wire pressing plate in some embodiments of the present application. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the technical solutions of the present application, the present application will be further described below in conjunction with the drawings and examples. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings:

[0040] ​It should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing", "arranging" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "below" another element, the element can be "directly" or "indirectly" above the other element, or there can be one or more intervening elements. The terms "first", "second", "third" and the like are only for the convenience of describing the technical solutions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features with "first", "second", "third" and the like can be explicitly or implicitly included one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] The present application discloses a kind of mechanical device, including but not limited to construction machinery, engineering machinery, garden machinery, generator set, forestry plant protection machinery, petroleum and petrochemical machinery etc.. The mechanical device includes brushless motor, the brushless motor can be inner rotor brushless motor, it includes stator assembly, and rotor assembly is installed with stator assembly cooperation.The stator assembly and rotor assembly can be coaxially arranged.

[0042] Please refer to Figures 1 to 5 It is a kind of stator assembly in some embodiments of the present application, including winding assembly 1 and pressing line board 2, winding assembly 1 includes multiple stator coils 13, adjacent stator coils 13 are separated by predetermined gap to form wire slot A, wherein the pressing line board 2 is insulating material, and the pressing line board 2 includes plate body 21, plate body 21 extends several pressing line columns 22, and the pressing line column 22 extends into wire slot A to compress stator coil 13 on both sides of wire slot A.

[0043] The plate 21 is generally annular structure, and a through hole is arranged in the middle to allow the rotating shaft of the rotor assembly to extend out.

[0044] In some embodiments, the pressing line column 22 is provided with a guide structure away from one side of the plate body 21, which can be a conical structure or a circular structure, and the guide structure can have an inclined guide surface to prevent the stator coil 13 from being scratched when the pressing line column 22 is inserted into the wire slot A.

[0045] In some embodiments, the cross-sectional dimension of the wire pressing column 22 in the initial state (under no force) can be slightly larger than the cross-sectional dimension of the wire slot A. The wire pressing column 22 has elasticity, each wire pressing column 22 includes a plurality of wire pressing portions, which are arranged together with a certain space between the wire pressing portions. When the wire pressing column 22 is inserted into the wire slot A, due to the small space of the wire slot A, the part of the plurality of wire pressing portions away from the plate body 21 will shrink along the center line of the wire pressing column 22, at this time, the compression force generated will act on the stator coil 13, and the stator coil 13 is pressed and fixed. Understandably, the elasticity of the wire pressing column 22 is provided by its own structure.

[0046] Preferably, at least two wire pressing portions of the plurality of wire pressing portions are arranged towards the stator coil 13 on both sides of the wire slot A, so that the at least two wire pressing portions can press the stator coil 13 on both sides of the wire slot A.

[0047] Referring to Figure 4 and Figure 5 , the plurality of wire pressing portions includes three wire pressing portions, and any one wire pressing portion is arranged towards the gap between the other two wire pressing portions, such as the wire pressing portion can include a first wire pressing portion 221, a second wire pressing portion 222 and a third wire pressing portion 223, the gap between the first wire pressing portion 221 and the second wire pressing portion 222 is a first gap a, the gap between the second wire pressing portion 222 and the third wire pressing portion 223 is a second gap b, and the gap between the third wire pressing portion 223 and the first wire pressing portion 221 is a third gap c, wherein the lateral surface of the first wire pressing portion 221 is arranged towards the second gap b, the lateral surface of the second wire pressing portion 222 is arranged towards the third gap c, and the lateral surface of the third wire pressing portion 223 is arranged towards the first gap c, so that when the plurality of wire pressing portions are under stress, they shrink uniformly.

[0048] Preferably, the cross section of the wire pressing portion is one of rectangular, arc-shaped and semicircular. The lengths of the plurality of wire pressing portions can be the same or different, and the shapes and sizes of the cross sections of the plurality of wire pressing portions can be the same or different.

[0049] In some embodiments, the wire winding assembly 1 includes a stator core 11 and a wire holder 12 cooperating with the stator core 11, and the stator coil 13 is wound on the stator core 11 and the wire holder 12. Wherein, the plate body 21 is installed with the wire holder 12 through the positioning structure.

[0050] In some embodiments, the positioning structure can include a positioning hole 211 provided on the plate body 21 and a positioning post 1215 provided on the wire holder 12 and inserted into the positioning hole 211. The positioning hole 211 can be a circular hole, which can be large or small, and can serve as a foolproof function. Understandably, the number and position of the positioning hole 211 can be selected according to requirements, which are not specifically limited here.

[0051] In some embodiments, the positioning structure can include a positioning hole 211 provided on the plate body 21 and a positioning post 1215 provided on the wire holder 12 and inserted into the positioning hole 211. The positioning hole 211 can be a circular hole, which can be large or small, and can serve as a foolproof function. Understandably, the number and position of the positioning hole 211 can be selected according to requirements, which are not specifically limited here.

[0052] In some embodiments, the stator core 11 is a salient pole structure and can be in a columnar shape. Specifically, in the present embodiment, the stator core 11 can be substantially and not limited to a cylindrical shape. The wire holder 12 can be sleeved on the stator core 11, which can be used for mounting the stator coil 13.

[0053] In some embodiments, the stator core 11 can include a ring body 111 and internal teeth 112. The ring body 111 is a hollow and through structure at both ends, and is a circular ring. The internal teeth 112 can be a plurality of internal teeth 112, which can be spaced apart along the circumferential direction of the ring body 111 and arranged in the ring body 111. One end of the internal teeth 112 can be connected with the inner side wall of the ring body 111, and the other end can be arranged in the radial direction of the ring body 111. In some embodiments, the internal teeth 112 can be integrally formed with the ring body 111.

[0054] The wire holder 12 includes a first wire holder 121 and a second wire holder 122 which are fitted and mounted at both ends of the stator core 11. The first wire holder 121 and the second wire holder 122 can be respectively sleeved on the axial ends of the stator core 11.

[0055] In some embodiments, the first wire holder 121 can be an upper wire holder, which can be sleeved on the internal teeth 112 of the stator core 11 from one end of the stator core 11. The second wire holder 122 can be a lower wire holder, which can be sleeved on the internal teeth 112 of the stator core 11 from the other end of the stator core 11. The first wire holder 121 and the second wire holder 122 can have the same structure, and the first wire holder 121 and the second wire holder 122 can be mutually fitted and covered on the periphery of the internal teeth 112 of the stator core 11. The positioning post 1215 and / or the positioning portion 1216 described above are provided on the first wire holder 121.

[0056] Preferably, the first wire holder 121 can be a structure comprising a first annular portion 1211 and a first sleeve portion 1212 arranged on the first annular portion 1211, and the positioning column 1215 and / or the positioning portion 1216 are arranged on the first annular portion 1211 and / or the first sleeve portion 1212.

[0057] Preferably, the upper surface of the first sleeve portion 1212 is provided with a first spacer 1213 and a second spacer 1214, which can be used to position and limit the stator coil 13. The positioning column 1215 mentioned above can be arranged on the first spacer 1213 and / or the second spacer 1214. Preferably, in some embodiments, the first annular portion 1211 is provided with a boss portion, and the positioning column 1215 can be arranged on the boss portion, wherein when the wire pressing plate 2 is mounted on the winding assembly 1, the positioning column 1215 can be inserted into the positioning hole 211, and the boss portion can support the lower surface of the plate body 21.

[0058] Preferably, the second wire holder 122 can be a structure comprising a second annular portion 1221 and a second sleeve portion 1222 arranged on the second annular portion 1221. The structure of the second wire holder 122 can be similar to that of the first wire holder 121.

[0059] Preferably, the plate body 21 and the wire holder 12 are fixed together by hot melt riveting, wherein after the positioning column 1215 is inserted into the positioning hole 211, the positioning column 1215 is hot melt riveted to fix the wire pressing plate 2.

[0060] Preferably, the plate body 21 is further provided with a plurality of glue dropping holes 213 for facilitating subsequent glue dropping process, so that glue can be dropped into the coil winding. The glue dropping hole 213 is arranged corresponding to the stator coil 13, and the glue dropping hole 213 can be a square hole, a circular hole or an arc-shaped hole.

[0061] In some embodiments, the plate body 21 is further provided with a lead-out hole 214 for leading out the phase line 14 connected with the stator coil 13. The lead-out hole 214 can be a notch structure formed on the edge of the plate body 21.

[0062] Preferably, the wire pressing plate 2 is a plastic part. Preferably, the wire pressing plate 2 can be made of hard insulating materials, such as phenolic plastic, polyurethane plastic, epoxy plastic, unsaturated polyester plastic, furan plastic, silicone resin, acryl-based resin and modified resins thereof.

[0063] Understandably, after the stator assembly is wound, the phase wire 14 is led out, placed on the corresponding stator coil 13, and then the pressing wire plate 2 is covered, which can lock the phase wire 14 in the corresponding position, without the complex processes of twisting, arranging, sleeving, binding, gluing, drying, cutting, etc., thereby improving the production efficiency. Meanwhile, the elastic pressing wire column 22 is inserted into the wire slot A, which can press and fix the wire inside, further preventing the wire from loosening.

[0064] The stator assembly has the following beneficial effects: the structure of the pressing wire plate 2 is simple, easy to produce and cheap. The plate body 21 of the pressing wire plate 2 can lock the phase wire 14 in the corresponding position. The pressing wire column 22 on the pressing wire plate 2 is elastic, which can better press the enameled wire to prevent the wire from loosening. The pressing wire plate 2 is provided with positioning holes 211 and positioning grooves 212, which are convenient for positioning and guiding during installation and also convenient for riveting with other workpieces. The pressing wire plate 2 is provided with glue dropping holes 213, which are convenient for subsequent glue dropping processes.

[0065] Understandably, the above embodiments only express the preferred embodiments of the present application, which are described in detail and specifically, but cannot be understood as the limitation of the patent scope of the present application. It should be noted that, for ordinary skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, any equivalent transformation and modification within the scope of the claims of the present application should belong to the scope of the claims of the present application.

Claims

1. A stator assembly characterized by, The winding assembly (1) comprises a plurality of stator coils (13), and adjacent stator coils (13) are separated by a predetermined gap to form a wire slot (A); The wire pressing plate (2) is made of insulating material, and comprises a plate body (21) extending with a plurality of wire pressing columns (22) extending into the wire slot (A) to press the stator coils (13) on both sides of the wire slot (A); the cross-sectional dimension of the wire pressing column (22) in the initial state is slightly larger than the cross-sectional dimension of the wire slot (A); Each wire pressing column (22) comprises a plurality of wire pressing portions, and the plurality of wire pressing portions are arranged together with a center interval of the wire pressing column (22); at least two wire pressing portions of the plurality of wire pressing portions are arranged towards the stator coils (13) on both sides of the wire slot (A); the plurality of wire pressing portions comprise three wire pressing portions, and any one wire pressing portion is arranged towards the gap between the other two wire pressing portions.

2. The stator assembly of claim 1, wherein, The cross-section of the wire pressing portion is one of rectangular, arc-shaped and semicircular.

3. The stator assembly of claim 1, wherein, The wire pressing column (22) is provided with a guide structure on the side away from the plate body (21).

4. A stator assembly according to any one of claims 1 to 3, characterised in that, The winding assembly (1) comprises a stator core (11) and a bobbin (12) matched with the stator core (11); the stator coils (13) are wound on the stator core (11) and the bobbin (12); The plate body (21) and the bobbin (12) are matched and installed through a positioning structure.

5. The stator assembly of claim 4, wherein, The positioning structure comprises a positioning hole provided on the plate body (21) and a positioning column provided on the bobbin (12) to be inserted into the positioning hole. The positioning structure comprises a positioning slot provided on the plate body (21) and a positioning portion provided on the bobbin (12) to be inserted into the positioning slot.

6. The stator assembly of claim 5, wherein, The bobbin (12) comprises a first bobbin (121) and a second bobbin (122) matched and installed at both ends of the stator core (11); The positioning column and / or the positioning portion are provided on the first bobbin (121).

7. The stator assembly of claim 6, wherein, The first bobbin (121) comprises a first annular portion (1211) and a first sleeve portion (1212) provided on the first annular portion (1211); The positioning column and / or the positioning portion are provided on the first annular portion (1211) and / or the first sleeve portion (1212).

8. The stator assembly of claim 4, wherein, The plate body (21) and the bobbin (12) are fixed together through hot riveting.

9. A stator assembly according to any one of claims 1 to 3, characterised in that, The plate body (21) is further provided with a plurality of glue dropping holes.

10. A stator assembly according to any one of claims 1 to 3, characterised in that, The plate body (21) is further provided with an outlet for leading out the phase line connected with the stator coil (13).

11. A stator assembly according to any one of claims 1 to 3, characterised in that, The wire pressing plate (2) is a plastic part.

12. A brushless electric motor characterized by The stator assembly comprises the stator assembly according to any one of claims 1 to 11, and a rotor assembly matched and installed with the stator assembly.

13. The brushless motor of claim 12, wherein, A through hole is provided in the middle of the plate body (21) to extend the rotating shaft of the rotor assembly.

14. A mechanical device, characterized by The brushless motor comprises the brushless motor according to claim 13.

Images