Hollow cup winding and hollow cup motor

Abstract

The utility model provides a coreless winding and a coreless motor, the coreless winding comprises three rhombic sheet groups, each rhombic sheet group is formed by winding a copper wire, each rhombic sheet group comprises a plurality of rhombic sheets, the wire outlet end of the Nth rhombic sheet in each rhombic sheet group extends to the wire inlet end of the (N + 1) th rhombic sheet, N is a natural number, and N is a natural number. N is greater than or equal to 1, the wire inlet ends of the three rhombic sheet groups are respectively used for connecting three-phase power, and the wire outlet ends of the three rhombic sheet groups are welded together. Each diamond sheet group of the hollow cup winding is formed by winding one copper wire, so that the final hollow cup winding has only one welding spot, the number of the welding spots is reduced, the possibility of problems such as pseudo soldering and solder skips is reduced, and the quality of the hollow cup winding and the hollow cup motor is ensured.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a coreless cup winding and a coreless cup motor. Background Art

[0002] The coreless motor is a highly efficient energy conversion device. It is a DC, permanent magnet, servo micro motor with outstanding energy-saving characteristics, sensitive and convenient control characteristics, and stable operation characteristics. It has been widely used in aircraft, medical equipment, household appliances, electric vehicles and other fields.

[0003] In the hollow cup motor, the hollow cup winding is made of copper wire. During production, the copper wire is first wound into a diamond-shaped piece, and then multiple diamond-shaped pieces are rolled into a winding. Each diamond-shaped piece has two wire ends, so there will be many wire ends on the winding, and the hollow cup winding will eventually leave only three wire ends for external three-phase power. The remaining wire ends need to be welded according to a certain process. For example, in Figure 1 In the figure, 4 diamond pieces are arranged, then the wire ends b and c, the wire ends d and e, and the wire ends f and g need to be welded together.

[0004] In such a hollow cup winding structure, the remaining wire ends are welded together, resulting in many welding spots on the hollow cup winding. The welding spots are prone to problems such as cold welding and leaking welding. Improper welding spot treatment will affect the insulation performance and ultimately affect the quality of the hollow cup winding and the quality of the hollow cup motor. Based on this, the present application proposes a hollow cup winding and a hollow cup motor. Utility Model Content

[0005] The present application provides a hollow cup winding and a hollow cup motor. Each rhombus sheet group of the hollow cup winding is wound by a copper wire, so that there is only one final welding point, which reduces the number of welding points, reduces the possibility of problems such as cold welding and leaking welding, and ensures the quality of the hollow cup winding.

[0006] In order to solve the above technical problems, this application adopts the following technical solutions:

[0007] The first aspect of the present application provides a hollow cup winding, comprising three rhombus sheet groups, each of which is wound by a copper wire, each of which includes multiple rhombus sheets, the outgoing line end of the Nth rhombus sheet in each rhombus sheet group extends to the incoming line end of the N+1th rhombus sheet, wherein N is a natural number, and N is greater than or equal to 1, the incoming line ends of the three rhombus sheet groups are respectively used to connect three-phase electricity, and the outgoing line ends of the three rhombus sheet groups are welded together.

[0008] In this hollow cup winding, the rhombus in each rhombus group is wound by a copper wire, and the outlet end of the Nth rhombus and the inlet end of the N+1th rhombus in the same rhombus group are connected by the same copper wire, and no welding is required between two adjacent rhombuses. The outlet ends of the three rhombus groups are welded together, forming only one welding point.

[0009] Compared with the prior art, each diamond-shaped sheet group of the hollow cup winding is wound by a copper wire, so that there is only one final welding point, which reduces the number of welding points, reduces the possibility of problems such as cold welding and leaking welding, and ensures the quality of the hollow cup winding.

[0010] In one embodiment of the present application, the Nth diamond-shaped pieces in the three diamond-shaped piece groups are arranged adjacent to each other in sequence.

[0011] In one embodiment of the present application, the number of diamond pieces in each diamond piece group is equal.

[0012] In one embodiment of the present application, the number of diamond pieces in each diamond piece group is 4.

[0013] In one embodiment of the present application, the coreless cup winding is vacuum dipped in varnish.

[0014] The second aspect of the present application provides a hollow cup motor, including a shell, a rotor assembly and a stator assembly, wherein the rotor assembly is rotatably connected in the shell, and the stator assembly includes the hollow cup winding of the first aspect, wherein the hollow cup winding is fixed in the shell and arranged around the rotor assembly.

[0015] Compared with the prior art, since the hollow cup motor includes the hollow cup winding of the first aspect, each diamond-shaped sheet group is wound by a copper wire, so that there is only one final welding point, which reduces the number of welding points and the possibility of problems such as cold welding and leaking welding, thereby ensuring the quality of the hollow cup winding and the quality of the hollow cup motor.

[0016] In one embodiment of the present application, the rotor assembly includes a rotating shaft and a rotor magnet, the rotating shaft is rotatably connected to the housing, and the rotor magnet is fixed to the rotating shaft;

[0017] The stator assembly comprises the hollow cup winding and a circuit board, and the incoming wire end of the rhombus sheet group in the hollow cup winding is welded to the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the unfolded structure of the existing hollow cup winding;

[0020] Figure 2 A schematic diagram of the three-dimensional structure of a hollow cup winding provided in one embodiment of the present application;

[0021] Figure 3 A schematic diagram of the unfolded structure of a hollow cup winding provided in one embodiment of the present application;

[0022] Figure 4 A schematic cross-sectional view of the coreless cup motor provided in accordance with an embodiment of the present application.

[0023] Reference numerals:

[0024] 100, hollow cup winding; 200, diamond plate group; 300, diamond plate; 400, hollow cup motor; 500, housing; 600, rotor assembly; 610, rotating shaft; 620, rotor core; 700, stator assembly; 710, circuit board. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0026] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] Figure 2 A schematic diagram of the three-dimensional structure of a hollow cup winding provided in one embodiment of the present application. Figure 3 A schematic diagram of the expanded structure of a hollow cup winding provided in one embodiment of the present application. Figure 4 A schematic cross-sectional view of the coreless cup motor provided in accordance with an embodiment of the present application.

[0030] The embodiment of the first aspect of the present application provides a hollow cup winding 100, such as Figure 2 and Figure 3 As shown, three rhombus sheet groups 200 are included, each rhombus sheet group 200 is wound by a copper wire, each rhombus sheet group 200 includes a plurality of rhombus sheets 300, and the outlet end of the Nth rhombus sheet 300 in each rhombus sheet group 200 extends to the inlet end of the N+1th rhombus sheet 300, wherein N is a natural number, and N is greater than or equal to 1. That is to say, in each rhombus sheet group 200, two adjacent rhombus sheets 300 are connected as a whole, and are wound by a copper wire, and there is no need to weld them again. During winding, after the Nth rhombus sheet 300 is wound, the copper wire is not cut, and the N+1th rhombus sheet 300 can be wound continuously, and the rhombus sheet group 200 can be obtained by repeating this process.

[0031] exist Figure 3 In the embodiment, the diamond pieces 300 No. 1, 4, 7 and 10 belong to the first diamond piece group 200, the diamond pieces 300 No. 2, 5, 8 and 11 belong to the second diamond piece group 200, and the diamond pieces 300 No. 3, 6, 9 and 12 belong to the third diamond piece group 200, then the wire outlet end of the diamond piece 300 No. 1 is integrated with the wire inlet end of the diamond piece 300 No. 4, and the diamond piece 300 No. 1 and the diamond piece 300 No. 4 are wound by the same copper wire. The other diamond pieces 300 are arranged in the same manner.

[0032] The inlet terminals of the three rhombus sheet groups 200 are respectively used to connect three-phase electricity, that is, the inlet terminals of the 1st, 2nd and 3rd rhombus sheets 300 are correspondingly connected to three-phase electricity. The outlet terminals of the three rhombus sheet groups 200 are welded together, that is, the outlet terminals of the 10th, 11th and 12th rhombus sheets 300 are welded together to form one welding point.

[0033] In this hollow cup winding 100, the diamond sheet 300 in each diamond sheet group 200 is wound by a copper wire, and the outlet end of the Nth diamond sheet 300 and the inlet end of the N+1th diamond sheet 300 in the same diamond sheet group 200 are connected by the same copper wire, and welding is not required between two adjacent diamond sheets 300. The outlet ends of the three diamond sheet groups 200 are welded together, forming only one welding point.

[0034] Compared with the prior art, each diamond sheet group 200 of the hollow cup winding 100 is wound by a copper wire, so that there is only one final welding point, which reduces the number of welding points, reduces the possibility of problems such as cold welding and leaking welding, and ensures the quality of the hollow cup winding 100.

[0035] In some embodiments, Figure 3 As shown, the Nth diamond pieces 300 in the three diamond piece groups 200 are arranged adjacent to each other in sequence. For example, the first diamond piece 300 in the three diamond piece groups 200 is arranged adjacent to each other in sequence, which means that the first, second and third diamond pieces 300 are arranged adjacent to each other in sequence, so that the three diamond piece groups 200 are arranged in a staggered manner, and the hollow cup winding 100 formed by winding is more solid.

[0036] In some embodiments, the number of diamond sheets 300 in each diamond sheet group 200 is equal, so that the diamond sheets 300 in the hollow cup winding 100 are arranged more evenly and have better dynamic balance.

[0037] In some embodiments, Figure 3 As shown, the number of diamond sheets 300 in each diamond sheet group 200 is 4, so that the entire hollow cup winding 100 is wound by 12 diamond sheets 300 .

[0038] It should be noted that the number of diamond plates 300 in each diamond plate group 200 is related to the number of motor pole pairs. Generally, when the number of motor pole pairs is 1, the number of diamond plates 300 in each diamond plate group 200 can be 2. When the number of motor pole pairs is 2, the number of diamond plates 300 in each diamond plate group 200 can be 4.

[0039] In some embodiments, the hollow cup winding 100 is treated with varnish so that the copper wire of the hollow cup winding 100 is insulated and also has the functions of preventing damage and corrosion.

[0040] The embodiment of the second aspect of the present application provides a coreless motor 400, such as Figure 4 As shown, it includes a shell 500, a rotor assembly 600 and a stator assembly 700, wherein the shell 500 is a structure for installing and supporting other components, the rotor assembly 600 is rotatably connected in the shell 500, and the stator assembly 700 includes the hollow cup winding 100 of the first aspect, the hollow cup winding 100 is fixed in the shell 500 and arranged around the rotor assembly 600, thereby realizing the function of the hollow cup motor 400.

[0041] It should be noted that the difference between the hollow cup winding 100 of the present application and the existing hollow cup winding 100 is mainly in the winding method. Therefore, the hollow cup motor 400 can be configured with reference to the configuration method of the existing motor.

[0042] Compared with the prior art, since the hollow cup motor 400 includes the hollow cup winding 100 of the first aspect, each diamond sheet group 200 is wound by a copper wire, so that there is only one final welding point, which reduces the number of welding points and the possibility of problems such as cold welding and leaking welding, thereby ensuring the quality of the hollow cup winding 100 and the quality of the hollow cup motor 400.

[0043] In some embodiments, Figure 4 As shown, the rotor assembly 600 includes a rotating shaft 610 and a rotor core 620. The rotating shaft 610 is rotatably connected to the housing 500, and the rotor core 620 is fixed on the rotating shaft 610 to realize the function of the rotor assembly 600. The stator assembly 700 includes a hollow cup winding 100 and a circuit board 710. The inlet end of the diamond sheet group 200 in the hollow cup winding 100 is welded to the circuit board 710, and then can be connected to the external three-phase electricity.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A hollow cup winding, characterized in that: The invention comprises three rhombus sheet groups, each of which is wound by a copper wire, each of which comprises a plurality of rhombus sheets, and the outlet end of the Nth rhombus sheet in each rhombus sheet group extends to the inlet end of the N+1th rhombus sheet, wherein N is a natural number and is greater than or equal to 1; The inlet ends of the three diamond-shaped sheet groups are respectively used to connect three-phase electricity, and the outlet ends of the three diamond-shaped sheet groups are welded together.

2. The hollow cup winding according to claim 1, characterized in that: The Nth rhombus pieces in the three rhombus piece groups are arranged adjacent to each other in sequence.

3. The hollow cup winding according to claim 2, characterized in that: The number of rhombus pieces in each rhombus piece group is equal.

4. The hollow cup winding according to claim 3, characterized in that: The number of rhombus pieces in each rhombus piece group is 4.

5. The hollow cup winding according to claim 1, characterized in that: The hollow cup winding is vacuum dipped in varnish.

6. A coreless motor, characterized in that: It comprises a shell, a rotor assembly and a stator assembly, wherein the rotor assembly is rotatably connected in the shell, and the stator assembly comprises a hollow cup winding as described in any one of claims 1 to 5, wherein the hollow cup winding is fixed in the shell and arranged around the rotor assembly.

7. The coreless motor according to claim 6, characterized in that: The rotor assembly comprises a rotating shaft and a rotor magnetic steel, wherein the rotating shaft is rotatably connected to the housing, and the rotor magnetic steel is fixed on the rotating shaft; The stator assembly comprises the hollow cup winding and a circuit board, and the incoming wire end of the rhombus sheet group in the hollow cup winding is welded to the circuit board.

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