Stator module and motor

Abstract

The invention discloses a stator module and a motor, the stator module comprises a stator punching sheet, a tooth pressure plate, a pressure ring and a rib plate surrounding the stator punching sheet, the stator punching sheet, the tooth pressure plate and the pressure ring are laminated, and the rib plate is welded with the pressure ring; the outer diameter of the pressing ring is larger than that of the tooth pressing plate and smaller than that of the stator punching sheet. Compared with the prior art, according to the stator module and the motor, the outer diameter of the pressing ring is set to be larger than the outer diameter of the tooth pressing plate and smaller than the outer diameter of the stator punching sheet, extrusion of the rib plate on the tooth pressing plate caused by welding shrinkage can be reduced, and the phenomenon of protruding sheets is reduced. Moreover, one side, facing the stator punching sheet, of the whole outer edge of the tooth pressing plate is provided with a recess, so that a gap is formed between the outer edge of the tooth pressing plate and the stator punching sheet which is laminated with the tooth pressing plate, and the generation of a lug phenomenon can be further reduced.

Description

Technical Field

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

[0002] With the rapid development of rail transit, higher reliability requirements are put forward for traction motors. The motor iron core is one of the important components of the motor. The processes of iron core lamination and welding are key processes in the motor manufacturing process, and their lamination and welding quality have a great impact on the safe operation of the motor.

[0003] Such as Figure 1 As shown, the stator module of the current traction motor is fixed by a lamination die with a stator punching sheet 1, an end plate 2, and a retaining ring 3, and an initial inter-sheet pressure is given by applying oil pressure. The stator punching sheet 1 is surrounded by four rib plates 4, and the rib plates 4 are welded to the retaining ring 3. After the lamination die is removed after welding, the stator punching sheet 1 at the end of the iron core sometimes moves to cause a tabbing phenomenon. This tabbing phenomenon has a risk of cutting the stator coil and causing insulation grounding. Summary of the Invention

[0004] To solve the above technical problems, the object of the present invention is to provide a stator module and a motor that can reduce the occurrence of tabbing phenomenon.

[0005] The technical solution provided by the present invention is as follows: A stator module includes a stacked stator punching sheet, a tooth pressing plate, a retaining ring, and a rib plate surrounding the stator punching sheet, and the rib plate is welded to the retaining ring; wherein, the outer diameter of the retaining ring is greater than the outer diameter of the tooth pressing plate and less than the outer diameter of the stator punching sheet.

[0006] Preferably, the entire outer edge of the tooth pressing plate is provided with a recess on the side facing the stator punching sheet, so as to form a gap between the outer edge of the tooth pressing plate and the stator punching sheet laminated with the tooth pressing plate.

[0007] Preferably, the recess is annular.

[0008] Preferably, the recess forms a step with an outer diameter smaller than that of the tooth pressing plate.

[0009] A stator module includes a stator core, two tooth pressing plates, two retaining rings, and a rib plate. The stator core is formed by laminating a plurality of stator punching sheets. Each tooth pressing plate and each retaining ring form a group and are laminated in sequence at both ends of the stator core. The rib plate surrounds the stator core and is welded to the retaining ring; wherein, in each group, the outer diameter of the retaining ring is greater than the outer diameter of the tooth pressing plate and less than the outer diameter of the stator punching sheet laminated with the tooth pressing plate.

[0010] Preferably, the entire outer edge of the tooth pressing plate is provided with a recess on the side facing the stator punching sheet, so as to form a gap between the outer edge of the tooth pressing plate and the stator punching sheet laminated with the tooth pressing plate.

[0011] Preferably, the recess is annular.

[0012] Preferably, the recess forms a step with an outer diameter smaller than that of the tooth pressing plate.

[0013] A motor includes a stator module and a rotor module that cooperate with each other, and the stator module is the stator module as described above.

[0014] Preferably, the motor is a traction motor.

[0015] Compared with the prior art, in the stator module and the motor of the present invention, by setting the outer diameter of the retaining ring to be larger than the outer diameter of the tooth pressing plate and smaller than the outer diameter of the stator punching sheet, the extrusion of the rib plate on the tooth pressing plate caused by welding shrinkage can be reduced, and the generation of the tab phenomenon can be reduced. Moreover, by providing a recess on one side of the entire outer edge of the tooth pressing plate facing the stator punching sheet, a gap is formed between the outer edge of the tooth pressing plate and the stator punching sheet laminated with the tooth pressing plate. On the one hand, the peripheral axial deformation ability of the tooth pressing plate is increased, the restriction of the welding shrinkage deformation of the rib plate is weakened, the inter-sheet pressure of the periphery will not increase abnormally, and the uniformity of the inter-sheet pressure is improved; on the other hand, the axial deformation ability of the stator punching sheet close to the tooth pressing plate is also increased. When the stator punching sheet in this area undergoes axial deformation, the outer diameter size will become smaller, which can avoid the extrusion of the rib plate on the stator punching sheet to further reduce the generation of the tab phenomenon. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of a stator module in the prior art; Figure 2 It is a top view of the stator module in the embodiment of the present invention; Figure 3 It is Figure 2 The front view of the shown stator module; Figure 4 It is Figure 3 The schematic diagram of the shown stator module; Figure 5 It is Figure 4 The partial enlarged view of the connection part of the stator punching sheet, the tooth pressing plate, the retaining ring and the rib plate in the shown stator module. Detailed Embodiments

[0018] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0019] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0020] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to this application.

[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" or "several" means two or more, unless otherwise specifically defined.

[0022] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that this application can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in this application.

[0023] Such as Figures 2 to 5As shown in the figure, an embodiment of the present invention provides a stator module, which includes stacked stator laminations 5, tooth press plates 6, retaining rings 7, and rib plates 8 surrounding the stator laminations 5. The rib plates 8 are welded to the retaining rings 7. Specifically, in this embodiment, multiple stator laminations 5 are stacked to form a stator core. There are two tooth press plates 6 and two retaining rings 7. Each tooth press plate 6 and each retaining ring 7 form a group and are sequentially stacked at both ends of the stator core. There are four rib plates 8, which jointly surround the stator laminations 5 to fix the stator laminations 5.

[0024] Through research and practice, it is found that the main reason for the tab phenomenon is that after the rib plates 8 shrink during welding, they displace towards the core side, squeezing the tooth press plates 6 and the end stator laminations 5 inward. Moreover, the tooth press plates 6 restrict the shrinkage deformation of the rib plates 8 during welding, resulting in an abnormally large peripheral pressure on the stator laminations 5, thus causing the stator laminations 5 to move inward to form tabs. In view of this, in this embodiment, the outer diameter of the retaining ring 7 is larger than the outer diameter of the tooth press plate 6 and smaller than the outer diameter of the stator lamination 5, that is, the outer diameter dimension φ2 of the tooth press plate 6 < the outer diameter φ1 of the retaining ring 7 < the outer diameter φ4 of the lamination (as Figure 5 shown), so that the extrusion of the rib plates 8 on the tooth press plates 6 caused by welding shrinkage can be reduced, and the generation of tab phenomena can be reduced.

[0025] And, as Figure 4 、 Figure 5 shown, in this embodiment, a recess 61 is provided on one side of the entire outer edge of the tooth press plate 6 facing the stator lamination 5, so as to form a gap between the outer edge of the tooth press plate 6 and the stator lamination 5 stacked with the tooth press plate 6. Specifically, the recess 61 is annular, forming a step with an outer diameter smaller than that of the tooth press plate 6, that is, φ3 < φ2, and the step depth is H. In this way, on the one hand, the peripheral axial deformation ability of the tooth press plate 6 is increased, the restriction of the shrinkage deformation of the rib plates 8 during welding is weakened, the peripheral inter-sheet pressure will not increase abnormally, and the uniformity of the inter-sheet pressure is improved; on the other hand, the axial deformation ability of the stator laminations 5 near the tooth press plate 6 is also increased. When the stator laminations 5 in this area deform axially, the outer diameter dimension will become smaller, which can avoid the extrusion of the rib plates 8 on the stator laminations 5 to further reduce the generation of tab phenomena. Of course, in other embodiments, the recess can also be of other shapes.

[0026] This embodiment also provides a motor, which includes a stator module and a rotor module that cooperate with each other. The stator module is the stator module as described above. This motor can be a traction motor and is used to drive trains, electric vehicles, and other similar transportation means.

[0027] The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stator module, characterized in that, It includes stacked stator laminations, tooth pressing plates, retaining rings, and rib plates surrounding the stator laminations, and the rib plates are welded to the retaining rings; wherein, the outer diameter of the retaining ring is larger than the outer diameter of the tooth pressing plate and smaller than the outer diameter of the stator lamination.

2. The stator module according to claim 1, wherein, The entire outer edge of the tooth pressing plate is provided with a recess on the side facing the stator lamination, so as to form a gap between the outer edge of the tooth pressing plate and the stator lamination laminated with the tooth pressing plate.

3. The stator module according to claim 2, wherein: The recess is annular.

4. The stator module according to claim 3, characterized in that The recess forms a step with an outer diameter smaller than that of the tooth pressing plate.

5. A stator module, characterized in that, It includes a stator core, two tooth pressing plates, two retaining rings, and rib plates. The stator core is formed by stacking a plurality of stator laminations. Each tooth pressing plate and each retaining ring form a group and are sequentially laminated at both ends of the stator core. The rib plates surround the stator core and are welded to the retaining rings; wherein, in each group, the outer diameter of the retaining ring is larger than the outer diameter of the tooth pressing plate and smaller than the outer diameter of the stator lamination laminated with the tooth pressing plate.

6. The stator module according to claim 5, wherein The entire outer edge of the tooth pressing plate is provided with a recess on the side facing the stator lamination, so as to form a gap between the outer edge of the tooth pressing plate and the stator lamination laminated with the tooth pressing plate.

7. The stator module according to claim 6, characterized in that The recess is annular.

8. The stator module according to claim 7, wherein: The recess forms a step with an outer diameter smaller than that of the tooth pressing plate.

9. A motor, comprising a stator module and a rotor module that cooperate with each other, characterized in that, The stator module is the stator module according to any one of claims 1 to 8.

10. The motor according to claim 9, characterized in that, The motor is a traction motor.

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