Coreless motor

Abstract

The utility model discloses a coreless motor which comprises a stator assembly and a rotor assembly, the stator assembly comprises a winding support frame, the winding support frame is sleeved on the periphery of the rotor assembly, and a gap is reserved between the winding support frame and the rotor assembly; the winding support frame is of a hollow tubular structure or a centrosymmetric hollow skeleton structure; the winding is arranged on the periphery of the winding supporting frame in a sleeving mode, and the inner side wall of the winding is tensioned on the winding supporting frame. The winding supporting frame is arranged, and the winding is arranged on the winding supporting frame in a sleeving mode, so that the occurrence of steel rubbing and short circuit risks caused by deformation of the winding and the magnetic steel in the operation process of an existing winding and magnetic steel adjacent structure is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of coreless cup motors, in particular to a coreless cup motor. Background Art

[0002] Compared with traditional slot motors, coreless motors have less torque fluctuation, less back EMF harmonics, higher space utilization, and better performance in terms of control accuracy and output characteristics due to the lack of stator slot structure. Therefore, in recent years, coreless motors have been widely used in various high-precision application scenarios such as life sciences, aviation, medical equipment, and intelligent manufacturing to replace traditional slot motors.

[0003] However, when the coreless motor replaced the slotted motor, the biggest structural change was the stator structure. Since the stator laminations eliminated the slotted structure, the winding lost its support and skeleton, and it was difficult to stabilize the size during the winding process. Therefore, the coreless motor is prone to uncontrollable risks during operation, which seriously affects the stable operation of the motor. Moreover, the replacement and use of the coreless motor is concentrated in motors with a relatively large length-to-diameter ratio, and the two sides of the air gap are the outer circle of the magnetic steel and the inner circle of the winding. The unstable winding structure size will lead to an increase in the eccentricity of the stator and rotor, which can easily bring the risk of steel friction and short circuit to the motor.

[0004] How to solve the above-mentioned technical problems has become a technical problem that needs to be solved urgently in the industry. Summary of the invention

[0005] In order to at least solve the above-mentioned technical problems, the purpose of the utility model is to provide a hollow cup motor, which, by setting a winding support frame and setting the winding sleeve on the winding support frame, avoids the risk of winding deformation and friction with the magnetic steel and short circuit during operation in the existing structure where the winding is adjacent to the magnetic steel.

[0006] In order to achieve the above-mentioned purpose, the hollow cup motor provided in the present application includes: a stator assembly and a rotor assembly, and the stator assembly includes:

[0007] A winding support frame, the winding support frame is sleeved on the outer periphery of the rotor assembly, and a gap is left between the winding support frame and the rotor assembly;

[0008] The winding support frame is a hollow tube structure, or a centrally symmetrical hollow skeleton structure;

[0009] The winding is sleeved on the outer periphery of the winding support frame, and the inner side wall of the winding is tensioned on the winding support frame.

[0010] Furthermore, the winding support frame has two working states: radial contraction and radial expansion;

[0011] When the winding support frame is in a radially contracted working state, the outer diameter of the winding support frame is smaller than the inner diameter of the winding.

[0012] Furthermore, the winding support frame comprises:

[0013] A body, which is arranged on the outer periphery of the rotor assembly, and a gap is left between the inner side wall of the body and the rotor assembly;

[0014] Multiple groups of adjustment units, each group of adjustment units includes a first adjustment part whose bottom is fixed to the outer wall of the main body and a second adjustment part that cooperates with the first adjustment part. The second adjustment part has the freedom to rotate clockwise and counterclockwise along the central axis of the main body on the surface of the first adjustment part. When the second adjustment part rotates counterclockwise, the distance between the outer wall of the second adjustment part and the main body gradually increases. When the second adjustment part rotates clockwise, the distance between the outer wall of the second adjustment part and the main body gradually decreases. The winding sleeve is arranged on the outer wall of the second adjustment part.

[0015] Further, the first adjusting portion protrudes on the outer side wall of the main body;

[0016] The first adjusting portion is wedge-shaped in the radial direction of the main body;

[0017] The first adjusting portion is in the shape of strips or discontinuous dots in the axial direction of the main body;

[0018] A surface of the first adjusting portion facing away from the main body is a plane with a certain inclination angle;

[0019] The distance between the side of the first adjusting portion facing away from the main body and the axis of the main body gradually increases in a counterclockwise direction;

[0020] The second adjustment part matches the first adjustment part;

[0021] The second adjustment portion is strip-shaped in the axial direction of the main body;

[0022] The second adjusting portion is in contact with a surface of the first adjusting portion that is away from the main body;

[0023] A surface of the second adjusting portion facing away from the main body is an arc-shaped surface.

[0024] Furthermore, the first adjusting portion is arranged on the outer side wall of the body in a groove shape;

[0025] The second adjusting portion is wedge-shaped in the radial direction of the main body;

[0026] The second adjustment portion is strip-shaped in the axial direction of the main body;

[0027] The second adjusting portion includes a protrusion, and the protrusion matches the first adjusting portion;

[0028] Each adjustment unit also includes:

[0029] A third adjusting portion, the third adjusting portion is arranged on the outer side wall of the body;

[0030] The third adjusting portion is in a groove shape;

[0031] The distance between the bottom of the third adjusting portion and the inner side wall of the body is greater than the distance between the bottom of the first adjusting portion and the inner side wall of the body;

[0032] The raised portion matches the third adjusting portion;

[0033] A step is provided between the first adjustment portion and the third adjustment portion;

[0034] A surface of the second adjusting portion facing away from the main body is an arc-shaped surface.

[0035] Furthermore, a convex shaft is provided at the end of the second adjusting portion;

[0036] A groove is provided at the axial side end of the body.

[0037] Furthermore, when the inner side wall of the winding is tensioned on the winding support frame, a clamping device for limiting the position of the main body is provided at the end of the second adjusting portion;

[0038] The clamping device is used to lock the tensioning state of the winding.

[0039] Furthermore, the clamping device comprises:

[0040] The end of the second adjusting portion is provided with a circular ring structure;

[0041] The annular structure connects the ends of the plurality of second adjusting parts;

[0042] The annular structure is provided with a positioning hole, and a positioning hole is also provided at a corresponding position of the body;

[0043] A limiting rod is also provided between the annular structure and the body;

[0044] The bent parts at both ends of the limiting rod are respectively connected to the positioning hole on the annular structure and the positioning hole on the body.

[0045] Furthermore, a casing is provided on the outer layer of the winding;

[0046] The casing is a cage-like structure;

[0047] The housing includes two housing parts;

[0048] The housing component includes an annular portion;

[0049] A plurality of side strips parallel to the central axis of the annular portion are provided on the axial side of the annular portion;

[0050] The side strips of the two casing parts are engaged with each other to form the casing.

[0051] Further, end covers are provided at both ends of the casing;

[0052] A bearing chamber is provided in the middle of the end cover, and the bearing chamber is used for arranging bearings;

[0053] The casing is embedded in the end cover.

[0054] Further, when the winding support frame is a skeleton structure, the winding support frame includes a plurality of bone bars parallel to the central axis;

[0055] The distances between any two bones and the central axis are equal.

[0056] The coreless cup motor of the embodiment of the present application, by providing a winding support frame, sets the winding on the winding support frame, thereby avoiding the risk of deformation of the winding and friction with the magnetic steel and short circuit during operation in the existing structure where the winding is adjacent to the magnetic steel; simplifies the finishing and shaping links in the existing winding manufacturing process, greatly optimizes the winding manufacturing efficiency, and reduces the winding manufacturing cost; by providing a winding support frame, because the surface of the winding support frame is smoother than the surface of the winding in the existing design where the winding is directly adjacent to the magnetic steel, the gap between the winding support frame and the magnetic steel is smaller, further improving the motor performance; through the winding support The design of the frame makes it easier to control the concentricity between the coil and the rotor assembly, further reducing the problem of friction between the winding and the magnetic steel when the winding is exposed; the design of the winding support frame also reduces the use of adhesive glue between the winding and the stator core in the existing design, simplifies the process, optimizes the heat dissipation performance of the motor, and further improves the reliability of the motor; the winding support frame has two working states of radial contraction and radial expansion, making it easier and more convenient to arrange the winding sleeve outside the winding support frame; the outer annular opening of the winding support frame is provided with an outward chamfer, which further facilitates the arrangement of the winding sleeve outside the winding support frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings:

[0058] Figure 1 This is a schematic diagram of the structure of a coreless motor according to an embodiment of the present application;

[0059] Figure 2 is a schematic diagram of the casing structure of an embodiment of the present application;

[0060] Figure 3 is a schematic diagram of the structure of the casing components of an embodiment of the present application;

[0061] Figure 4 This is a schematic diagram of the structure of the housing and the end cover when assembled in an embodiment of the present application;

[0062] Figure 5 is a schematic structural diagram of a stator assembly from a first perspective of an embodiment of the present application;

[0063] Figure 6 is a structural schematic diagram of a stator assembly from a second viewing angle of an embodiment of the present application;

[0064] Figure 7 This is a schematic structural diagram of a support layer in a first working state according to an embodiment of the present application;

[0065] Figure 8 This is a schematic structural diagram of a support layer in a second working state according to an embodiment of the present application;

[0066] Fig. 9 is a schematic diagram of the support layer structure of another embodiment of the present application;

[0067] Fig.10 is a structural schematic diagram of a support layer in a first working state according to another embodiment of the present application;

[0068] Fig.11 It is a schematic structural diagram of the support layer in the second working state of another embodiment of the present application.

[0069] Description of reference numerals:

[0070] 101-shaft; 102-magnet; 103-winding; 104-winding support frame; 1041-main body; 1042-second adjustment part; 1043-convex shaft; 1044-first adjustment part; 1045-groove; 1046-protrusion; 1047-third adjustment part; 105-casing; 106-end cover; 107-bearing chamber; 201-ring part; 202-edge strip. DETAILED DESCRIPTION

[0071] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present application. It should be understood that the drawings and embodiments of the present application are only for exemplary purposes and are not intended to limit the scope of protection of the present application.

[0072] It should be understood that the various steps described in the method implementation of the present application can be performed in different orders and / or performed in parallel. In addition, the method implementation may include additional steps and / or omit the steps shown. The scope of the present application is not limited in this respect.

[0073] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0074] It should be noted that the modifications of "one" and "plurality" mentioned in this application are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more". "Plurality" should be understood as two or more.

[0075] The coreless cup motor of the embodiment of the present application comprises a stator assembly and a rotor assembly, wherein the stator assembly comprises:

[0076] A winding support frame, the winding support frame is sleeved on the outer periphery of the rotor assembly, and a gap is left between the winding support frame and the rotor assembly;

[0077] The winding support frame is a hollow tube structure, or a centrally symmetrical hollow skeleton structure;

[0078] The winding is sleeved on the outer periphery of the winding support frame, and the inner side wall of the winding is tensioned on the winding support frame.

[0079] Example 1

[0080] Figure 1 is a schematic diagram of the structure of the coreless cup motor according to an embodiment of the present application, Figure 2 is a schematic diagram of the casing structure of an embodiment of the present application, Figure 3 is a schematic diagram of the structure of the housing components of an embodiment of the present application, Figure 4 is a schematic diagram of the structure of the housing and the end cover when assembled in the embodiment of the present application, Figure 5 is a schematic structural diagram of a stator assembly from a first perspective of an embodiment of the present application, Figure 6 is a schematic structural diagram of a stator assembly from a second viewing angle according to an embodiment of the present application, Figure 7 is a schematic structural diagram of the support layer in the first working state of an embodiment of the present application, Figure 8 This is a schematic diagram of the structure of the support layer in the second working state of the embodiment of the present application. Figure 1-8 The coreless cup motor of the embodiment of the present application is described in detail.

[0081] The coreless cup motor of the embodiment of the present application includes a rotor assembly.

[0082] In some exemplary embodiments, the rotor assembly includes a rotating shaft 101 and a magnetic steel 102 .

[0083] In some exemplary embodiments, the rotating shaft 101 is a cylindrical shaft, for example, the rotating shaft 101 is a circular cylindrical shaft.

[0084] In some exemplary embodiments, the rotating shaft 101 may be a metallic or non-metallic cylindrical shaft as required.

[0085] In some exemplary embodiments, the magnetic steel 102 is annularly wrapped around the outside of the rotating shaft 101 .

[0086] In some exemplary embodiments, the magnetic steel 102 is disposed in the middle portion of the rotating shaft 101 , which can be understood as the magnetic steel 102 wrapping around the middle portion of the rotating shaft 101 .

[0087] In some exemplary embodiments, the magnetic steel 102 is in a hollow cylindrical structure.

[0088] In some exemplary embodiments, the central axis of the magnetic steel 102 coincides with the central axis of the rotating shaft 101 .

[0089] In some exemplary embodiments, the magnetic steel 102 is bonded to the rotating shaft 101 by glue, and the glue may be quick-drying glue.

[0090] In some exemplary embodiments, the coreless cup motor of the embodiment of the present application further includes: a stator assembly.

[0091] In some exemplary embodiments, the stator assembly surrounds the rotor assembly, for example, the stator assembly surrounds the rotor assembly in an annular shape.

[0092] In some exemplary embodiments, a gap is provided between the stator assembly and the rotor assembly.

[0093] In some exemplary embodiments, a central axis of the stator assembly coincides with a central axis of the rotor assembly.

[0094] In some exemplary embodiments, the stator assembly further includes a winding support frame 104 .

[0095] In some exemplary embodiments, the winding support frame 104 is a hollow tube structure, or a centrally symmetrical hollow skeleton structure.

[0096] In some exemplary embodiments, when the winding support frame 104 is a skeleton structure, the winding support frame 104 includes a plurality of bone bars parallel to the central axis.

[0097] In some exemplary embodiments, the bone bars located on the side are parallel to the central axis of the winding support frame 104, that is, the bone bars are distributed in a ring shape.

[0098] In some exemplary embodiments, as required, a plurality of bone bars are distributed at equal intervals on the side of the winding support frame 104 .

[0099] In some exemplary embodiments, the distances between any two bone bars and the central axis of the winding support frame 104 are equal, that is, the distances between each bone bar and the central axis of the winding support frame 104 are equal.

[0100] In some exemplary embodiments, as desired, the bone strips may be linear structures parallel to each other.

[0101] In some exemplary embodiments, the winding support frame 104 is sleeved on the outer circumference of the rotor assembly.

[0102] In some exemplary embodiments, the central axis of the winding support frame 104 coincides with the central axis of the rotating shaft 101 ; or in other words, the central axis of the winding support frame 104 coincides with the central axis of the rotor assembly.

[0103] In some exemplary embodiments, a gap is left between the winding support frame 104 and the rotor assembly.

[0104] In some exemplary embodiments, a gap is left between the winding support frame 104 and the rotor assembly, that is, a gap is provided between the winding support frame 104 and the magnetic steel 102, and the minimum gap can be 0.1-0.2 mm; of course, according to needs, the gap between the winding support frame 104 and the magnetic steel 102 can also be 0.2-0.4 mm.

[0105] In some exemplary embodiments, the winding support frame 104 is made of a non-magnetic conductive material.

[0106] In some exemplary embodiments, when the winding support frame 104 is made of a non-magnetic material, the material of the winding support frame 104 can be aluminum, alloy, stainless steel, or polytetrafluoroethylene.

[0107] In some exemplary embodiments, the stator assembly further includes a winding 103 .

[0108] In some exemplary embodiments, the winding 103 is sleeved on the outer circumference of the winding support frame 104 .

[0109] In some exemplary embodiments, the inner surface of the winding 103 is attached to the outer surface of the winding support frame 104 .

[0110] In some exemplary embodiments, the winding 103 is in a tensioned state and is attached to the outer surface of the winding support frame 104 .

[0111] In some exemplary embodiments, the winding support frame 104 has two working states: radial contraction and radial expansion. It can be understood that the winding support frame 104 has a radial contraction function, such as radial contraction and expansion achieved by rotation.

[0112] In some exemplary embodiments, the winding support frame 104 includes: a body 1041 .

[0113] In some exemplary embodiments, the body 1041 is disposed on the outer periphery of the rotor assembly, and a gap is left between the inner wall of the body 1041 and the rotor assembly.

[0114] In some exemplary embodiments, the body 1041 is in the shape of a ring or a hollow cylinder.

[0115] In some exemplary embodiments, the body 1041 is disposed on the outer periphery of the rotor assembly.

[0116] In some exemplary embodiments, a gap is provided between the body 1041 and the rotor assembly.

[0117] In some exemplary embodiments, the winding support frame 104 further includes: an adjustment unit.

[0118] In some exemplary embodiments, the adjusting units include a plurality of groups, and each group of adjusting units includes a first adjusting portion 1044 having a bottom fixed to an outer side wall of the body 1041 .

[0119] In some exemplary embodiments, the first adjusting portion 1044 protrudes from an outer side wall of the body 1041 .

[0120] In some exemplary embodiments, the first adjustment portion 1044 is wedge-shaped in the radial direction of the body 1041 .

[0121] In some exemplary embodiments, the first adjustment portion 1044 is in a strip shape or a discontinuous dot shape in the axial direction of the body 1041 .

[0122] In some exemplary embodiments, when the first adjustment portion 1044 is in the shape of discontinuous dots, a plurality of discontinuous first adjustment portions 1044 are on the same straight line.

[0123] In some exemplary embodiments, the side of the first adjustment portion 1044 facing away from the main body 1041 is a smooth plane, and the side of the first adjustment portion 1044 facing away from the main body 1041 has a plane with a certain inclination angle; the distance between the side of the first adjustment portion 1044 facing away from the main body 1041 and the axis of the main body 1041 gradually increases in a counterclockwise direction.

[0124] In some exemplary embodiments, each group of adjustment units further includes a second adjustment portion 1042 that cooperates with the first adjustment portion 1044 .

[0125] In some exemplary embodiments, a plurality of groups of adjustment units are distributed at equal intervals on the outside of the body 1041 .

[0126] In some exemplary embodiments, the inclination angle of the second adjustment portion 1042 matches the inclination angle of the first adjustment portion 1044 .

[0127] In some exemplary embodiments, the second adjustment portion 1042 fits the first adjustment portion 1044 , and a surface of the second adjustment portion 1042 facing the first adjustment portion 1044 matches a surface of the first adjustment portion 1044 facing away from the body 1041 .

[0128] In some exemplary embodiments, a surface of the second adjusting portion 1042 facing away from the main body 1041 is an arc-shaped surface.

[0129] In some exemplary embodiments, multiple groups of adjustment units are distributed around the body 1041 at equal intervals.

[0130] In some exemplary embodiments, the plurality of first adjustment portions 1044 are distributed in a ring shape at equal intervals on the outside of the body 1041 , and the plurality of first adjustment portions 1044 have the same inclination direction.

[0131] In some exemplary embodiments, the second adjustment portion 1042 has the freedom to rotate clockwise and counterclockwise along the central axis of the body 1041 on the surface of the first adjustment portion 1044. When the second adjustment portion 1042 rotates counterclockwise, the distance between the outer wall of the second adjustment portion 1042 and the body 1041 gradually increases. When the second adjustment portion 1042 rotates clockwise, the distance between the outer wall of the second adjustment portion 1042 and the body 1041 gradually decreases. Figure 7-8 shown.

[0132] In some exemplary embodiments, the winding 103 is sleeved on an outer side wall of the second adjustment portion 1042 .

[0133] In some exemplary embodiments, the second adjustment portion 1042 matches the first adjustment portion 1044 .

[0134] In some exemplary embodiments, the second adjustment portion 1042 may be designed to be in a strip or long sheet shape as a whole as needed, that is, the second adjustment portion 1042 is in a strip or long sheet shape in the axial direction of the body 1041 .

[0135] In some exemplary embodiments, as needed, the second adjustment portion 1042 may also be wedge-shaped in the radial direction of the body 1041 . When the first adjustment portion 1044 and the second adjustment portion 1042 are both wedge-shaped, the wedges of the two portions are oriented in opposite directions.

[0136] In some exemplary embodiments, as needed, each second adjustment portion 1042 can be an independent entity, or adjacent second adjustment portions 1042 can be connected by ribs; of course, as needed, the ribs can connect all the second adjustment portions 1042 together, and the ribs are connected into a ring shape.

[0137] In some exemplary embodiments, as needed, the plurality of second adjustment parts 1042 may be connected by a plurality of ribs, and the plurality of ribs may be arranged in parallel.

[0138] In some exemplary embodiments, a convex shaft 1043 is provided at one axial end of the second adjustment portion 1042. When the main body 1041 is fixed, the second adjustment portion 1042 is driven to rotate by rotating the convex shaft 1043, thereby adjusting the distance between the outer wall of the second adjustment portion 1042 and the main body 1041, thereby adjusting the tension state of the winding 103 mounted on the outer wall of the second adjustment portion 1042.

[0139] In some exemplary embodiments, as needed, the second adjusting portion 1042 may be extended as a whole, and the function of the convex shaft 1043 is achieved through the extended portion of the second adjusting portion 1042 .

[0140] In some exemplary embodiments, as needed, a groove 1045 may be provided at one axial end of the body 1041 , and the groove 1045 is disposed on the inner side of the body 1041 . Of course, the groove 1045 may also be disposed between the inner and outer walls of the body 1041 as needed.

[0141] In some exemplary embodiments, when adjusting the distance between the outer wall of the second adjustment portion 1042 and the main body 1041, an external structure can be inserted into the groove 1045, and the tensioning state of the winding 103 mounted on the outer wall of the second adjustment portion 1042 can be adjusted by rotating the groove 1045 and the convex shaft 1043 in opposite directions.

[0142] In some exemplary embodiments, when the adjustment portion on the outer wall of the main body 1041 is provided with a plurality of gradient adjustment portions according to the same change trend, a step is provided between adjacent first adjustment portions 1044 on the outer wall of the main body 1041 in the same group of adjustment units, that is, the head of the first adjustment portion 1044 in two adjacent adjustment units is higher than the tail of another adjacent first adjustment portion 1044, and the height here refers to the dimension value of the outer side of the first adjustment portion 1044 from the main body 1041.

[0143] In some exemplary embodiments, as needed, the length dimension of the second adjustment portion 1042 can be the same as the axial height of the main body 1041, or the length dimension of the second adjustment portion 1042 can be slightly smaller than the axial height of the main body 1041. Of course, the length dimension of the second adjustment portion 1042 can also be slightly larger than the axial height of the main body 1041.

[0144] In some exemplary embodiments, adjustment of the rotation of the second adjustment portion 1042 can be achieved by means of an auxiliary tool; of course, the tail of the second adjustment portion 1042 can also be fixed together, and the tail of the second adjustment portion 1042 and the axial tail of the main body 1041 are on the same axial side of the main body 1041; for example, a fixing ring is provided at the tail of the second adjustment portion 1042, and the fixing ring connects the tail of the second adjustment portion 1042 together, and the rotation of the second adjustment portion 1042 is achieved by rotating the fixing ring; of course, according to needs, it can also be designed to achieve relative rotation of the second adjustment portion 1042 by rotating the main body 1041.

[0145] In some exemplary embodiments, multiple groups of adjustment units are distributed around the body 1041 at equal intervals.

[0146] In some exemplary embodiments, the second adjustment portion 1042 has the freedom to rotate clockwise and counterclockwise on the surface of the first adjustment portion 1044 along the central axis of the main body 1041; that is, the second adjustment portion 1042 can rotate in clockwise and counterclockwise directions relative to the first adjustment portion 1044, and the specific rotation angle can be set according to actual needs.

[0147] In some exemplary embodiments, when the second adjusting portion 1042 rotates counterclockwise, the distance between the outer side wall of the second adjusting portion 1042 and the body 1041 gradually increases. Figure 8 shown.

[0148] In some exemplary embodiments, when the second adjusting portion 1042 rotates clockwise, the distance between the outer side wall of the second adjusting portion 1042 and the body 1041 gradually decreases. Figure 7 shown.

[0149] In some exemplary embodiments, the second adjusting portion 1042 is controlled to rotate counterclockwise, and when the inner wall of the winding 103 is tensioned on the winding support frame 104 , the second adjusting portion 1042 stops rotating and is locked.

[0150] In some exemplary embodiments, when the inner wall of the winding 103 is in a state of being tensioned against the outer wall of the winding support frame 104, the position of the second adjustment portion 1042 relative to the main body 1041 is locked. A clamping device for limiting the position of the main body 1041 can be provided at the axial side end of the second adjustment portion 1042 as needed. For example, when the tail of the second adjustment portion 1042 is connected through a circular ring structure, a limiting rod is provided between the circular ring structure and the main body 1041, and a positioning hole is provided at one end of the circular ring structure. A positioning hole is also provided at a position corresponding to one end of the circular ring structure on the main body 1041. The bent portions at both ends of the limiting rod are respectively connected to the positioning holes on the circular ring structure and the positioning holes on the main body 1041 to lock the position. The structure of the limiting rod is similar to a U-shaped nail used in a stapler.

[0151] In some exemplary embodiments, the winding 103 is sleeved on an outer side wall of the second adjustment portion 1042 .

[0152] In some exemplary embodiments, when the winding support frame 104 is in a radially contracted working state, the outer diameter of the radial cross-section of the winding support frame 104 is smaller than the inner diameter of the radial cross-section of the winding 103; or it can be understood that when the winding support frame 104 is in a radially contracted working state, the outer diameter of the winding support frame 104 will shrink to be smaller than the inner diameter of the winding 103.

[0153] In some exemplary embodiments, when the winding support frame 104 is in a radially expanding working state, the winding support frame 104 will continue to expand until the outer diameter of the winding support frame 104 is equal to the inner diameter of the winding 103, that is, when the winding support frame 104 enters the radially expanded state, the winding 103 will enter a tensioned state until the outer wall of the winding support frame 104 is tightly fitted with the inner wall of the winding 103. In some exemplary embodiments, the winding 103 is in a hollow tube shape, for example, the winding 103 is in a hollow circular tube shape, or the winding 103 is in a hollow cylindrical structure.

[0154] In some exemplary embodiments, in order to facilitate the heat dissipation of the winding 103, the side wall of the winding support frame 104 is preferably designed as a mesh structure. The mesh structure can be understood as a plurality of through holes provided on the side wall of the winding support frame 104. The provision of the through holes further optimizes the heat dissipation performance of the winding support frame 104.

[0155] In some exemplary embodiments, the mesh area on the side wall of the winding support frame 104 does not exceed two-thirds of the area on the side wall of the winding support frame 104, and the mesh area is usually selected to account for between one-fifth and one-third of the area on the side wall of the winding support frame 104.

[0156] In some exemplary embodiments, the mesh holes on the side wall of the winding support frame 104 can be designed to be evenly distributed on the side wall as needed; or they can be designed to be concentratedly distributed in local areas as needed, that is, the mesh holes are dispersed on the side wall into multiple areas of concentratedly distributed mesh holes.

[0157] In some exemplary embodiments, optionally, an insulating layer is provided between the winding 103 and the winding support frame 104 .

[0158] In some exemplary embodiments, the insulating layer between the winding 103 and the winding support frame 104 can be achieved by applying insulating varnish on the winding 103 to achieve insulation between the winding 103 and the winding support frame 104, for example, the winding 103 is composed of enameled wire; of course, in order to enhance the insulation effect between the winding 103 and the winding support frame 104, insulating varnish and insulating layer can also be used at the same time, for example, after the winding 103 is composed of enameled wire, an insulating layer is set between the winding 103 and the winding support frame 104.

[0159] In some exemplary embodiments, the insulation layer between the winding 103 and the winding support frame 104 may be formed by coating insulation glue or attaching insulation tape.

[0160] In some exemplary embodiments, a casing 105 is further provided on the outer layer of the winding 103 .

[0161] In some exemplary embodiments, the housing 105 has a cage-like structure, that is, the sides of the housing 105 are non-enclosed structures; or it can be understood that the housing 105 has a hollow tube structure, and the side walls of the housing 105 are non-enclosed structures.

[0162] In some exemplary embodiments, the side wall of the housing 105 is of a non-enclosed structure, for example, a through hole is provided on the side wall of the housing 105 or a through groove is provided on the side wall of the housing 105 that penetrates the side wall.

[0163] In some exemplary embodiments, as required, the housing 105 may also be designed to be assembled from two housing parts.

[0164] In some exemplary embodiments, the housing component includes an annular portion 201 , and the annular portion 201 is, for example, an annular circle.

[0165] In some exemplary embodiments, the annular portions 201 of the two housing components are of the same size.

[0166] In some exemplary embodiments, a plurality of side strips 202 parallel to the central axis of the annular portion 201 are provided on the axial side of the annular portion 201 .

[0167] In some exemplary embodiments, the edge strip 202 may be understood as an extension protruding from the axial side of the annular portion 201 .

[0168] In some exemplary embodiments, each annular portion 201 includes a plurality of side strips 202 , and the plurality of side strips 202 are arranged in parallel.

[0169] In some exemplary embodiments, the side strips 202 of the two annular portions 201 have the same length.

[0170] In some exemplary embodiments, the widths of the side strips 202 of the two annular portions 201 may be the same or different.

[0171] In some exemplary embodiments, the number of the side strips 202 of the two annular portions 201 may be the same or different.

[0172] In some exemplary embodiments, the side strips 202 of two housing components are interlocked toward each other to form the housing 105 .

[0173] In some exemplary embodiments, when the side strips 202 of the two housing components are interlocked together facing each other, the side strips 202 of the two annular portions 201 may be alternately arranged at intervals.

[0174] In some exemplary embodiments, end covers 106 are provided at both ends of the housing 105 .

[0175] In some exemplary embodiments, when assembling the hollow cup motor of the embodiment of the present application, an end cover 106 can be first installed on the winding support frame 104, and then the winding 103 is sleeved on the winding support frame 104, the casing 105 is sleeved on the outside of the winding 103 and the casing 105 is matched with the end cover 106, the rotor assembly is installed, and finally the other end cover 106 is installed.

[0176] In some exemplary embodiments, the housing 105 is sleeved on the outside of the winding 103 and the housing 105 is matched with the end cover 106 , including embedding the housing 105 in the end cover 106 .

[0177] In some exemplary embodiments, an outwardly inclined chamfer is provided on the outer side of an opening at one end of the winding support frame 104 . The purpose of providing the outwardly inclined chamfer is to facilitate the installation of the winding 103 on the winding support frame 104 .

[0178] In some exemplary embodiments, the winding 103 mounted on the winding support frame 104 may be a flexible winding that has not been completely shaped, or may be a winding that has been shaped.

[0179] In some exemplary embodiments, when the winding 103 is a flexible winding that has not been completely shaped, after the flexible winding is sleeved on the winding support frame 104, it is still necessary to perform a shaping process on the flexible winding.

[0180] In some exemplary embodiments, optionally, the diameter of the winding support frame 104 can be adjusted in the radial direction of the winding support frame 104 , for example, the radial dimension of the winding support frame 104 can be changed by rotating the winding support frame 104 .

[0181] In some exemplary embodiments, an insulating pad is provided between the winding 103 and the end cover 106 , and the insulating pad is provided to ensure the insulation of the winding 103 .

[0182] In some exemplary embodiments, an insulating layer may be optionally included between the housing 105 and the winding 103 .

[0183] In some exemplary embodiments, the housing 105 may be made of a non-magnetic material or a magnetic material.

[0184] In some exemplary embodiments, a bearing chamber 107 is provided in the middle of the end cover 106 .

[0185] In some exemplary embodiments, the bearing chamber 107 is used to arrange a bearing.

[0186] In some exemplary embodiments, the rotating shaft 101 passes through the bearing housing 107 .

[0187] In some exemplary embodiments, the end cover 106 may be a flange as required.

[0188] In some exemplary embodiments, the sizes of the bearing chambers 107 in the two end covers 106 may be the same or different.

[0189] In some exemplary embodiments, the size of the bearing installed in the bearing housing 107 matches the size of the bearing housing 107 .

[0190] Example 2

[0191] Fig. 9 is a schematic diagram of the support layer structure of another embodiment of the present application, Fig.10 is a structural schematic diagram of a support layer in a first working state according to another embodiment of the present application, Fig.11 This is a structural diagram of the support layer in the second working state of another embodiment of the present application. Figure 9-11 The supporting layer structure of the embodiment of the present application is described in detail.

[0192] In some exemplary embodiments, Example 2 is yet another embodiment of the winding support frame 104 .

[0193] In some exemplary embodiments, the winding support frame 104 includes: a body 1041 .

[0194] In some exemplary embodiments, the body 1041 is disposed on the outer periphery of the rotor assembly, and a gap is left between the inner wall of the body 1041 and the rotor assembly.

[0195] In some exemplary embodiments, the body 1041 is annularly disposed on the outer circumference of the rotor assembly.

[0196] In some exemplary embodiments, the winding support frame 104 further includes: an adjustment unit.

[0197] In some exemplary embodiments, multiple groups of adjustment units are distributed in a ring shape at equal intervals on the outside of the body 1041.

[0198] In some exemplary embodiments, each group of adjustment units includes a first adjustment portion 1044 whose bottom is fixed to the outer side wall of the body 1041 and a second adjustment portion 1042 that cooperates with the first adjustment portion 1044 .

[0199] In some exemplary embodiments, the first adjustment portion 1044 is in a groove shape, that is, the first adjustment portion 1044 is a groove disposed on the outer side wall of the body 1041 .

[0200] In some exemplary embodiments, the second adjustment portion 1042 may be designed to be in a strip or long sheet shape as a whole as needed, that is, the second adjustment portion 1042 is in a strip or long sheet shape in the axial direction of the body 1041 .

[0201] In some exemplary embodiments, the second adjustment portion 1042 is wedge-shaped in the radial direction of the body 1041 .

[0202] In some exemplary embodiments, the cross-section of the second adjustment portion 1042 is in the shape of the letter "L", that is, the second adjustment portion 1042 is in the shape of an "L" on the radial cross-section of the main body 1041; a protrusion 1046 is provided on the second adjustment portion 1042 at a position corresponding to the first adjustment portion 1044.

[0203] In some exemplary embodiments, the protrusion 1046 matches the first adjustment portion 1044 .

[0204] In some exemplary embodiments, the plurality of first adjustment portions 1044 are distributed on the outer side wall of the body 1041 in a ring shape, for example, the plurality of first adjustment portions 1044 are distributed on the outer side wall of the body 1041 at equal intervals.

[0205] In some exemplary embodiments, each group of adjustment units further includes a third adjustment portion 1047 .

[0206] In some exemplary embodiments, the third adjustment portion 1047 is disposed on an outer side wall of the body 1041 .

[0207] In some exemplary embodiments, the third adjustment portion 1047 is also groove-shaped, except that the distance between the bottom of the third adjustment portion 1047 and the inner wall of the main body 1041 is greater than the distance between the bottom of the first adjustment portion 1044 and the inner wall of the main body 1041; it can be understood that the groove of the third adjustment portion 1047 is shallower than the groove of the first adjustment portion 10444.

[0208] In some exemplary embodiments, the protrusion 1046 matches with the third adjustment portion 1047 .

[0209] In some exemplary embodiments, a low step is provided between the first adjustment portion 1044 and the third adjustment portion 1047 , and the step is inclined from the third adjustment portion 1047 toward the first adjustment portion 1044 .

[0210] In some exemplary embodiments, as needed, the corner between the first adjustment portion 1044 and the step is chamfered, and the chamfer is a C chamfer or an R chamfer; the purpose of setting the chamfer is to make it easier for the second adjustment portion 1042 to drive the protrusion 1046 to rotate from the position of the first adjustment portion 1044 to the direction of the third adjustment portion 1047 when the second adjustment portion 1042 rotates counterclockwise, because the chamfer reduces the resistance to rotation.

[0211] In some exemplary embodiments, when the sleeve winding 103 is a flexible winding or an incompletely formed winding, the protrusion 1046 fits with the first adjustment portion 1044, such as Fig.10 As shown; after the winding 103 is sleeved, the second adjusting portion 1042 rotates counterclockwise, so that the protrusion 1046 on the second adjusting portion 1042 is out of contact with the first adjusting portion 1044, until the protrusion 1046 on the second adjusting portion 1042 contacts the third adjusting portion 1047, and then the counterclockwise rotation of the second adjusting portion 1042 is stopped; that is, the protrusion 1046 on the second adjusting portion 1042 falls into the third adjusting portion 1047, as shown Fig.11 shown.

[0212] In some exemplary embodiments, the rotation of the second adjusting portion 1042 can be adjusted by means of an auxiliary tool. Of course, the tail of the second adjusting portion 1042 can also be fixed together. For example, a fixing ring is provided at the axial end of the second adjusting portion 1042, and the fixing ring connects the axial ends of the second adjusting portion 1042 together, and the rotation of the second adjusting portion 1042 is achieved by rotating the fixing ring. Of course, according to needs, it can also be designed to achieve relative rotation of the second adjusting portion 1042 by rotating the main body 1041, or to achieve relative rotation by simultaneously rotating the main body 1041 and the second adjusting portion 1042.

[0213] In some exemplary embodiments, after the flexible winding is sleeved on the outside of the main body 1041, the second adjustment parts 1042 can be individually inserted into the corresponding positions of the first adjustment parts 1044 one by one, that is, the second adjustment parts 1042 are independent individuals at this time; when the axial ends of the second adjustment parts 1042 are connected, at least adjacent second adjustment parts 1042 are connected in pairs, and the second adjustment parts 1042 can be matched with the main body 1041 first, and then the flexible winding can be sleeved.

[0214] In some exemplary embodiments, the distance between the first adjustment portion 1044 and the third adjustment portion 1047 is set according to the diameter size of the winding support frame 104 and the diameter size of the winding 103, that is, when the second adjustment portion 1042 rotates counterclockwise, the protrusion 1046 falls into the third adjustment portion 1047 and at this time the inner wall of the winding 103 is in a state of being tensioned on the outer wall of the second adjustment portion 1042.

[0215] In some exemplary embodiments, as needed, the outer wall of the second adjustment portion 1042, that is, the side facing the winding 103, is an arcuate surface, and the arcuate surface is designed to reduce resistance when rotating the second adjustment portion 1042 and avoid damage to the inner side of the winding 103.

[0216] In some exemplary embodiments, as needed, the winding support frame 104 of the embodiment of the present application may also include the protrusion 1043 and the groove 1045 of the above embodiment, and the position and function of the protrusion 1043 and the groove 1045 in the embodiment of the present application are the same as those in the above embodiment.

[0217] Although the implementation methods disclosed in the utility model are as above, the content is only an implementation method adopted to facilitate the understanding of the utility model, and is not used to limit the utility model. Any technician in the field to which the utility model belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the utility model, but the scope of patent protection of the utility model shall still be based on the scope defined in the attached claims.

Claims

1. A coreless motor, comprising a stator assembly and a rotor assembly, characterized in that: The stator assembly comprises: A winding support frame, wherein the winding support frame is sleeved on the outer circumference of the rotor assembly, and a gap is left between the winding support frame and the rotor assembly; The winding support frame is a hollow tube structure, or a centrally symmetrical hollow skeleton structure; The winding is sleeved on the outer periphery of the winding support frame, and the inner side wall of the winding is tensioned on the winding support frame.

2. The coreless motor according to claim 1, characterized in that: The winding support frame has two working states: radial contraction and radial expansion; When the winding support frame is in a radially contracted working state, the outer diameter of the winding support frame is smaller than the inner diameter of the winding.

3. The coreless motor according to claim 2, characterized in that: The winding support frame comprises: A body, wherein the body is disposed on the outer periphery of the rotor assembly, and a gap is left between the inner side wall of the body and the rotor assembly; Multiple groups of adjustment units, each group of adjustment units includes a first adjustment part with a bottom fixed to the outer side wall of the main body and a second adjustment part cooperating with the first adjustment part, the second adjustment part has the freedom to rotate clockwise and counterclockwise along the central axis of the main body on the surface of the first adjustment part, when the second adjustment part rotates counterclockwise, the distance between the outer side wall of the second adjustment part and the main body gradually increases, when the second adjustment part rotates clockwise, the distance between the outer side wall of the second adjustment part and the main body gradually decreases, and the winding sleeve is arranged on the outer side wall of the second adjustment part.

4. The coreless motor according to claim 3, characterized in that: The first adjusting portion protrudes on the outer side wall of the body; The first adjusting portion is wedge-shaped in the radial direction of the body; The first adjusting portion is in the shape of a strip or a discontinuous point in the axial direction of the body; A surface of the first adjusting portion facing away from the main body is a plane with a certain inclination angle; The distance between the side of the first adjusting portion facing away from the main body and the axis of the main body gradually increases in a counterclockwise direction; The second adjusting portion matches the first adjusting portion; The second adjusting portion is strip-shaped in the axial direction of the body; The second adjusting portion is in contact with a surface of the first adjusting portion that is away from the main body; A surface of the second adjusting portion facing away from the main body is an arc-shaped surface.

5. The coreless motor according to claim 3, characterized in that: The first adjusting portion is arranged on the outer side wall of the body in a groove shape; The second adjusting portion is wedge-shaped in the radial direction of the body; The second adjusting portion is strip-shaped in the axial direction of the body; The second adjusting portion includes a protrusion, and the protrusion matches the first adjusting portion; Each of the adjustment units also includes: a third adjusting portion, the third adjusting portion being disposed on an outer side wall of the body; The third adjustment portion is in the shape of a groove; The distance between the bottom of the third adjusting portion and the inner side wall of the body is greater than the distance between the bottom of the first adjusting portion and the inner side wall of the body; The protrusion matches the third adjustment portion; A step is provided between the first adjusting portion and the third adjusting portion; A surface of the second adjusting portion facing away from the main body is an arc-shaped surface.

6. The coreless motor according to any one of claims 4 to 5, characterized in that: The end of the second adjusting portion is provided with a convex shaft; A groove is provided at the axial side end of the body.

7. The coreless motor according to claim 4, characterized in that: When the inner side wall of the winding is tensioned on the winding support frame, a clamping device for limiting the position of the main body is provided at the end of the second adjusting portion; The clamping device is used to lock the tensioning state of the winding.

8. The coreless motor according to claim 7, characterized in that: The clamping device comprises: The end of the second adjusting portion is provided with a circular ring structure; The annular structure connects the ends of the plurality of second adjusting parts; The annular structure is provided with a positioning hole, and a positioning hole is also provided at a corresponding position of the body; A limiting rod is also provided between the annular structure and the body; The bent parts at both ends of the limiting rod are respectively connected to the positioning hole on the annular structure and the positioning hole on the body.

9. The coreless motor according to claim 1, characterized in that: A casing is also provided on the outer layer of the winding; The housing is a cage-type structure; The housing comprises two housing parts; The housing component includes an annular portion; A plurality of side strips parallel to the central axis of the annular portion are provided on the axial side of the annular portion; The side strips of the two housing components are embedded in each other to form the housing.

10. The coreless motor according to claim 9, characterized in that: End covers are provided at both ends of the casing; A bearing chamber is provided in the middle of the end cover, and the bearing chamber is used for arranging bearings; The housing is embedded in the end cover.

11. The coreless motor according to claim 1, characterized in that: When the winding support frame is a skeleton structure, the winding support frame includes a plurality of bone bars parallel to the central axis; The distances between any two of the bone strips and the central axis are equal.

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