Stator core and motor

Abstract

The utility model relates to a stator core and a motor. The stator iron core comprises an iron core body which is provided with a connecting hole, and the connecting hole is located in the iron core body and extends in the axial direction from at least one end of the axial direction of the iron core body; the first matching piece is located in the connecting hole and matched with the connecting hole in shape; the oil guide pipe is positioned on one side of the stator iron core along the axial direction; and the connecting piece is inserted into the oil guide pipe and the first matching piece, so that the oil guide pipe is connected with the iron core body. According to the stator iron core, the iron core body and the oil guide pipe can be assembled conveniently, and connection between the iron core body and the oil guide pipe is reliable.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a stator core and a motor. Background Art

[0002] In the related art, in the scheme of the oil-cooled motor oil guide pipe in the motor, there are two main ways to connect the core body and the oil guide pipe, namely, directly tapping the core body to achieve connection with bolts or using rivets to achieve connection.

[0003] However, the above two methods have low reliability in connection between the two and are inconvenient to assemble. Utility Model Content

[0004] The embodiment of the present application provides a stator core and a motor. The stator core provided by the embodiment of the present application has high connection reliability between the core body and the oil guide pipe, and is easy to assemble.

[0005] In a first aspect, an embodiment of the present application provides a stator core, comprising a core body, a first matching piece, an oil guide pipe, and a connector. The core body has a connecting hole, which is located at at least one end of the core body in its own axial direction and extends axially. The first matching piece is located in the connecting hole and matches the shape of the connecting hole. The oil guide pipe is located on one side of the stator core in the axial direction. The connector is inserted into the oil guide pipe and the first matching piece, so that the oil guide pipe is connected to the core body.

[0006] In some embodiments, the connecting hole is a stepped hole, the wall surface enclosing the connecting hole has a transition surface, and the first matching piece at least partially abuts against the step surface.

[0007] In some embodiments, along the axial direction, the connecting hole includes a first hole segment and a second hole segment, the transition surface is connected between the first hole segment and the second hole segment, the first hole segment is located between the second hole segment and the oil guide pipe, the radial dimension of the first hole segment is smaller than the radial dimension of the second hole segment, and the first mating piece is inserted into the first hole segment and the second hole segment.

[0008] In some embodiments, along the axial direction, the first matching piece includes a third part and a fourth part, the third part is located between the fourth part and the oil guide tube, and the axial orthographic projection of the outer circumference of at least one of the third part and the fourth part is a polygon.

[0009] In some embodiments, the oil guide pipe is an arc-shaped pipeline, and one end of the arc-shaped pipeline away from the core body has a plurality of recessed portions, and the connectors are inserted into the recessed portions.

[0010] In some embodiments, the oil guide pipe further includes a second matching piece, the recessed portion includes an insertion hole, the second matching piece is connected to the insertion hole, and the connecting piece is inserted into the second matching piece.

[0011] In some embodiments, the core body includes a first oil outlet, the oil guide pipe includes an oil inlet, the first oil outlet is connected to the oil inlet, the core body includes a chamber, and the arc-shaped pipeline has a second oil outlet near the inner cylindrical surface of the chamber.

[0012] In some embodiments, along the axial direction of the core body, an axial dimension of the connecting hole is greater than an axial dimension of the first matching piece.

[0013] In some embodiments, the connecting hole and the first fitting include at least one of an overfit or an interference fit.

[0014] In a second aspect, an embodiment of the present application further provides a motor, comprising a stator core according to any one of the above items.

[0015] The stator core provided in the embodiment of the present application, by arranging the first fitting at the connecting hole of the core body, can realize the insertion of the connecting piece through the first fitting, which is more reliable than directly tapping the core body, and the first fitting can be cleaned after tapping, which can improve the cleanliness of the stator core, and improve the connection reliability between the core body and the oil guide pipe, and also improve the integration of the stator core, and the assembly is simple, so that the scrap rate of the stator core is reduced.

[0016] The motor provided in the embodiment of the present application can improve the stability and reliability of the connection between the core body and the oil guide pipe by providing a first matching piece on the stator core, while increasing the reliability of the motor.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0019] Figure 1 It is a structural schematic diagram of a stator core provided in an embodiment of the present application;

[0020] Figure 2 is a schematic top view of a stator core provided in an embodiment of the present application;

[0021] Figure 3 is a schematic top view of an iron core body provided in an embodiment of the present application;

[0022] Figure 4 is a cross-sectional schematic diagram of a stator core provided in an embodiment of the present application;

[0023] Figure 5 This application Figure 4 An enlarged schematic diagram of component A in the figure.

[0024] Description of Figure Numbers:

[0025] 10 stator core;

[0026] 100 core body; 110 connecting hole; 111 step surface; 112 first hole section; 113 second hole section; X-axis direction; 120 chamber;

[0027] 200 first matching piece; 210 third part; 220 fourth part;

[0028] 300 oil guide pipe; 310 recessed portion; 311 insertion hole; 320 second fitting piece;

[0029] 400 connectors.

[0030] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0031] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0032] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] In the related art, in the scheme of the oil-cooled motor oil guide pipe in the motor, there are two main ways to connect the core body and the oil guide pipe, namely, directly tapping the core body to achieve the connection or using rivets to achieve the connection.

[0034] However, in the solution of directly tapping the core body, it is easy to cause punching and warping of the core body, which seriously affects the cleanliness of the core body and cannot meet the cleaning requirements. After tapping, the bottom surface of the core body is easy to bulge and gaps are easy to occur. Tapping is prone to defective rates and will affect assembly. In the rivet connection solution, rivets are easy to rivet crooked, resulting in scrap, and it is easy to cause gaps and cracks in the core body.

[0035] Based on the above considerations, in order to solve the problems in the related art, a stator core and a motor are proposed.

[0036] Please refer to Figures 1 to 5 As shown, Figure 1 is a schematic diagram of the structure of a stator core provided in an embodiment of the present application, Figure 2 is a schematic top view of a stator core provided in an embodiment of the present application, Figure 3 is a schematic top view of an iron core body provided in an embodiment of the present application, Figure 4 is a cross-sectional schematic diagram of a stator core provided in an embodiment of the present application, Figure 5 This application Figure 4 An enlarged schematic diagram of component A in the figure.

[0037] The embodiment of the present application provides a stator core 10, comprising a core body 100, a first matching piece 200, an oil guide tube 300 and a connector 400. The core body 100 has a connecting hole 110, which is located at at least one end of the core body 100 in its own axial direction X and extends along the axial direction X. The first matching piece 200 is located in the connecting hole 110 and matches the shape of the connecting hole 110. The oil guide tube 300 is located on one side of the stator core 10 in the axial direction X. The connector 400 is inserted into the oil guide tube 300 and the first matching piece 200, so that the oil guide tube 300 is connected to the core body 100.

[0038] The core body 100 is formed by welding a plurality of single-stacked cores after being stacked. The connection hole 110 is located at the outermost core along the axial direction X of the core body 100. One or both of the cores at both ends of the axial direction may be provided with a connection hole 110. Optionally, the cores at both ends of the core body 100 are provided with connection holes 110. Both ends of the core body 100 are connected to oil guide pipes 300. When the stator core 10 is cooled by oil, the oil may circulate to the inside of the oil guide pipes 300 at both ends of the core body 100.

[0039] Optionally, the core body 100 includes a first oil outlet, the oil guide pipe 300 includes an oil inlet, the first oil outlet is connected to the oil inlet, the core body 100 includes a chamber 120 inside, and the arc-shaped pipeline has a second oil outlet near the inner cylindrical surface of the chamber 120.

[0040] Optionally, the interior of the chamber 120 of the core body 100 can be used to accommodate the stator winding. After the oil fills the oil circuit inside the core body 100, the oil flows from the first oil outlet to the oil inlet and enters the oil guide pipe 300. Thereafter, the oil can flow out through the second oil outlet of the oil guide pipe 300 and spray onto the stator winding, thereby cooling the stator winding.

[0041] The shapes of the connection holes 110 include circular, square, polygonal, etc., and the number of the connection holes 110 includes one, two, or even more.

[0042] The first fitting 200 and the connection hole 110 are connected by welding, pressing, etc. Optionally, the inner wall of the first fitting 200 is provided with internal threads, and the outer wall of the connection piece 400 has external threads matching the internal threads of the first fitting 200 .

[0043] The connection between the connecting member 400 and the oil guide pipe 300 and the first matching member 200 includes threaded connection, welding and the like.

[0044] The shape of the oil guide pipe 300 includes an arc shape, a circle shape, or a straight shape, which is not specifically limited here.

[0045] The stator core 10 provided in the embodiment of the present application, by arranging the first fitting 200 at the connecting hole 110 of the core body 100, can realize the insertion of the connecting piece 400 through the first fitting 200, which is more reliable than directly tapping the core body 100, and the first fitting 200 can be cleaned after tapping, which can improve the cleanliness of the stator core 10, and also improve the integration of the stator core 10, and the assembly is simple, so that the scrap rate of the stator core 10 is reduced, and the connection between the core body 100 and the oil guide pipe 300 is more reliable.

[0046] In some embodiments, the connection hole 110 is a stepped hole, and the wall surface enclosing the connection hole 110 has a step surface 111 , and the first matching piece 200 at least partially abuts against the step surface 111 .

[0047] When the connecting member 400 is locked, the first matching member 200 will abut against the step surface 111 , thereby achieving axial limitation of the first matching member 200 .

[0048] The stator core 10 provided in the embodiment of the present application has a step surface 111 on the wall surface that encloses the connecting hole 110, which can limit the axial X movement of the first fitting 200 along the core body 100, and limit the first fitting 200 in the axial X direction, which can limit the first fitting 200 from falling off the connecting hole 110, thereby improving the connection reliability between the first fitting 200 and the connecting hole 110.

[0049] In some embodiments, along the axial direction X, the connecting hole 110 includes a first hole segment 112 and a second hole segment 113, the step surface 111 is connected between the first hole segment 112 and the second hole segment 113, the first hole segment 112 is located between the second hole segment 113 and the oil guide pipe 300, the radial dimension of the first hole segment 112 is smaller than the radial dimension of the second hole segment 113, and the first mating piece 200 is inserted into the first hole segment 112 and the second hole segment 113.

[0050] The stator core 10 provided in the embodiment of the present application, through the setting of the connecting hole 110 including the first hole segment 112 and the second hole segment 113, and the radial dimension of the first hole segment 112 is smaller than the radial dimension of the second hole segment 113, can facilitate the assembly of the first mating piece 200 and simplify the production of the connecting hole 110.

[0051] In some embodiments, along the axial direction X, the first fitting 200 includes a third portion 210 and a fourth portion 220, the third portion 210 is located between the fourth portion 220 and the oil guide tube 300, and the orthographic projection of the outer circumference of at least one of the third portion 210 and the fourth portion 220 along the axial direction X is a polygon.

[0052] The orthographic projection of the outer circumference of the third portion 210 in the axial direction X may be a polygon, or the orthographic projection of the outer circumference of at least one of the fourth portions 220 in the axial direction X may be a polygon, or the orthographic projections of the outer circumferences of the third portion 210 and the fourth portion 220 in the axial direction X may be a polygon.

[0053] Polygonal shapes include triangles, quadrilaterals, hexagons, etc.

[0054] The stator core 10 provided in the embodiment of the present application can be adapted to the connecting hole 110 through the setting of the third part 210 and the fourth part 220, and the setting of the outer peripheral surface of at least one of the third part 210 and the fourth part 220 as a regular polygon can limit the circumferential rotation of the first matching part 200 and improve the stability of the first matching part 200.

[0055] In some embodiments, the polygon includes a hexagon.

[0056] In some embodiments, the oil guide pipe 300 is an arc-shaped pipeline, and one end of the arc-shaped pipeline away from the core body 100 has a plurality of recessed portions 310 , and the connector 400 is inserted into the recessed portions 310 .

[0057] The stator core 10 provided in the embodiment of the present application, through the setting of the arc-shaped pipeline, makes the shape of the oil guide pipe 300 more conducive to the connection with the core body 100, and the setting of multiple recessed portions 310 can shorten the axial X length of the connecting piece 400, making the connection tighter.

[0058] In some embodiments, the oil guide tube 300 further includes a second matching piece 320 , the recessed portion 310 includes an insertion hole 311 , the second matching piece 320 is connected to the insertion hole 311 , and the connecting piece 400 is inserted into the second matching piece 320 .

[0059] The stator core 10 provided in the embodiment of the present application facilitates the fixation of the connecting member 400 to the oil guide pipe 300 through the provision of the second matching member 320 .

[0060] In some embodiments, the core body 100 includes a first oil outlet, the oil guide pipe 300 includes an oil inlet, the first oil outlet is connected to the oil inlet, the core body 100 includes a chamber 120, and the arc-shaped pipeline has a second oil outlet near the inner cylindrical surface of the chamber 120.

[0061] Optionally, the interior of the chamber 120 of the core body 100 can be used to accommodate the stator winding. After the oil fills the oil circuit inside the core body 100, the oil flows from the first oil outlet to the oil inlet and enters the oil guide pipe 300. Thereafter, the oil can flow out through the second oil outlet of the oil guide pipe 300 and spray onto the stator winding, thereby cooling the stator winding.

[0062] The stator core 10 provided in the embodiment of the present application can realize the circulation of oil inside the core body 100 between the core body 100 and the oil guide pipe 300 through the setting of the first oil outlet and the oil inlet. The setting of the second oil outlet can facilitate the spraying of the oil and realize the cooling of other components in the chamber 120.

[0063] In some embodiments, along the axial direction X of the core body 100 , the axial dimension X of the connecting hole 110 is greater than the axial dimension X of the first fitting member 200 .

[0064] The axial X dimension of the connecting hole 110 is greater than the axial X dimension of the first matching piece 200 , and the difference between the two can be adjusted according to actual conditions.

[0065] The stator core 10 provided in the embodiment of the present application is limited by the axial X dimension of the connecting hole 110 being larger than the axial X dimension of the first fitting 200. In the stamping process of the core body 100, it is possible to prevent the thickness of the core body 100 in the axial direction X after compression from being less than the thickness of the first fitting 200, thereby reducing the phenomenon of cracking of the weld of the core body 100.

[0066] In some embodiments, the connection hole 110 and the first fitting 200 include at least one of an overfit or an interference fit.

[0067] The stator core 10 provided in the embodiment of the present application can facilitate the tight connection between the first matching piece 200 and the connecting hole 110 through the matching setting between the connecting hole 110 and the first matching piece 200, thereby reducing the connection process.

[0068] An embodiment of the present application further provides a motor, comprising the stator core 10 of any one of the above items.

[0069] The stator core 10 of the motor includes a core body 100, a first matching piece 200, an oil guide tube 300 and a connecting piece 400. The core body 100 has a connecting hole 110, which is located at at least one end of the core body 100 in its own axial direction X and extends along the axial direction X. The first matching piece 200 is located in the connecting hole 110 and matches the shape of the connecting hole 110. The oil guide tube 300 is located on one side of the stator core 10 in the axial direction X. The connecting piece 400 is inserted into the oil guide tube 300 and the first matching piece 200, so that the oil guide tube 300 is connected to the core body 100.

[0070] Optionally, the motor includes a casing and a stator winding, and the stator winding is located in a chamber 120 surrounded by a stator core 10. When the motor is oil-cooled, the oil first flows into the casing, then flows into the stator core 10 to cool the stator core 10, and then flows into the oil guide pipe 300, and then sprayed from the oil guide pipe 300 to the stator winding to cool the stator winding.

[0071] The motor provided in the embodiment of the present application can improve the stability and reliability of the connection between the core body 100 and the oil guide pipe 300 by providing the first matching piece 200 on the stator core 10, while increasing the reliability of the motor.

[0072] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A stator core (10), characterized in that: include: The iron core body (100) has a connection hole (110), wherein the connection hole (110) is located at at least one end of the iron core body (100) in its own axial direction (X) and extends along the axial direction (X); A first matching piece (200), located in the connecting hole (110) and matching the shape of the connecting hole (110); An oil guide pipe (300) is located on one side of the stator core (10) along the axial direction (X); The connecting piece (400) is inserted into the oil guide pipe (300) and the first matching piece (200), so that the oil guide pipe (300) is connected to the iron core body (100).

2. The stator core (10) according to claim 1, characterized in that: The connecting hole (110) is a stepped hole, and the wall surface enclosing the connecting hole (110) has a stepped surface (111), and the first matching piece (200) at least partially abuts against the stepped surface (111).

3. The stator core (10) according to claim 2, characterized in that: Along the axial direction (X), the connecting hole (110) comprises a first hole section (112) and a second hole section (113); the step surface (111) is connected between the first hole section (112) and the second hole section (113); the first hole section (112) is located between the second hole section (113) and the oil guide pipe (300); the radial dimension of the first hole section (112) is smaller than the radial dimension of the second hole section (113); and the first fitting (200) is plugged into the first hole section (112) and the second hole section (113).

4. The stator core (10) according to claim 3, characterized in that: Along the axial direction (X), the first matching component (200) comprises a third part (210) and a fourth part (220); the third part (210) is located between the fourth part (220) and the oil guide pipe (300); and the outer peripheral surface of at least one of the third part (210) and the fourth part (220) is a polygonal orthographic projection in the axial direction (X).

5. The stator core (10) according to claim 1, characterized in that: The oil guide pipe (300) is an arc-shaped pipeline, and one end of the arc-shaped pipeline away from the iron core body (100) has a plurality of recessed portions (310), and the connecting piece (400) is inserted into the recessed portions (310).

6. The stator core (10) according to claim 5, characterized in that: The oil guide pipe (300) further comprises a second matching piece (320), the recessed portion (310) comprises an insertion hole (311), the second matching piece (320) is connected to the insertion hole (311), and the connecting piece (400) is inserted into the second matching piece (320).

7. The stator core (10) according to claim 5, characterized in that: The core body (100) comprises a first oil outlet, the oil guide pipe (300) comprises an oil inlet, the first oil outlet is connected to the oil inlet, the core body (100) comprises a chamber (120) inside, and the arc-shaped pipeline has a second oil outlet close to the inner cylindrical surface of the chamber (120).

8. The stator core (10) according to claim 1, characterized in that: Along the axial direction (X) of the core body (100), the axial (X) dimension of the connecting hole (110) is greater than the axial (X) dimension of the first fitting piece (200).

9. The stator core (10) according to claim 1, characterized in that: The connection hole (110) and the first fitting member (200) include at least one of an overfit and an interference fit.

10. A motor, characterized in that: The invention comprises a stator core (10) according to any one of claims 1 to 9.

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