Structure of novel plug-in type insulation framework of motor straight winding stator

Abstract

The utility model discloses a novel plug-in type insulation skeleton structure of a motor straight winding stator, comprising two insulation skeletons which are installed in a plug-in manner, mirror image surfaces of the two insulation skeletons are provided with a plurality of groove-shaped skeletons, and the adjacent groove-shaped skeletons adopt an inner wall material removal and outer wall material removal interval design. The thickness of the inner wall removed material is consistent with the thickness of the outer wall removed material, the opposite groove-shaped frameworks penetrate into the positioning grooves of the stator iron core and then are inserted and matched with each other, and a groove for fixing a leading-out wire terminal seat is reserved at the end part of the insulating framework. According to the utility model, the traditional insulating stator which is integrally coated with the stator core is changed into a split type plug-in structure, so that the die sinking cost is effectively saved, the universality is strong, and the rejection rate of products is low.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a structure of a novel plug-in insulating skeleton for a direct-wound stator of a motor. Background Art

[0002] The insulation frame of existing direct-wound stators is formed by securing the stator core within the mold cavity and overmolding it with the insulation material. Each mold can only accommodate one stator core specification. Furthermore, this mold is complex and expensive to manufacture, and the overmolding process places high demands on the environment, equipment parameter settings, and operator proficiency. Consequently, uncontrollable factors such as an unreasonable mold structure, substandard mold machining accuracy, and mismatched processing equipment parameters can easily lead to insulation material shortages and shrinkage cavities in the overmolded product, resulting in poor withstand voltage and potential breakdown. Excessive flash and burrs in critical locations, such as the stator core notches, can significantly impact subsequent processing steps. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to overcome the defects of the above-mentioned prior art and provide a new plug-in insulating frame structure for a motor direct-wound stator, thereby changing the traditional insulating stator that is integrally molded with the stator core into a split plug-in structure, effectively saving mold opening costs, having strong versatility and low product scrap rate.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a structure of a new plug-in insulating skeleton for a direct-wound stator of a motor, including two insulating skeletons installed in a plug-in manner, a plurality of slot-shaped skeletons are arranged on the mirror surface of the two insulating skeletons, and adjacent slot-shaped skeletons are designed with inner wall removal and outer wall removal intervals, the thickness of the inner wall removal is consistent with the thickness of the outer wall removal, the opposite slot-shaped skeletons are inserted into the positioning grooves of the stator core and then plugged into each other, and the ends of the insulating skeletons are reserved with grooves for fixing the lead-out terminal seats.

[0005] Furthermore, eight slot-shaped frames are provided on each insulating frame, that is, after one insulating frame is inserted into the stator core according to the positioning slot, another insulating frame is rotated 45 degrees to be plugged into it.

[0006] Furthermore, the remaining length of the groove-shaped frame is the height h of the safe creepage distance.

[0007] Furthermore, the groove for fixing the lead-out terminal seat is set as a C-shaped structure to fix the lead-out terminal seat to the insulating frame.

[0008] Furthermore, the inner diameter of the groove-shaped frame with the inner wall removed is slightly larger than the outer diameter of the groove-shaped frame with the outer wall removed, so that the two can be plugged in and fitted together.

[0009] The structure of the novel plug-in insulating skeleton of the motor direct-wound stator of the utility model has the following beneficial effects:

[0010] 1. The original insulating stator, which was overmolded as a whole with the stator core, is changed to a split type. The insulating frame is injection-molded separately and a plug-in installation structure is adopted. This can effectively avoid a series of problems and hidden dangers caused by the overmolded insulating stator. For example, it effectively controls the occurrence of insulation material shortages and shrinkage holes, which cause poor voltage resistance and breakdown. The flash and burrs at key locations, such as the stator core slots, are greatly improved, greatly reducing product scrap rate and improving production capacity.

[0011] 2. Compared with the complex and expensive overmolding mold used for the insulating stator that is overmolded into a whole, this split-type interlocking insulating skeleton mold is relatively simple and affordable, effectively saving mold opening costs.

[0012] 3. The insulating skeleton of this structure can flexibly adjust the thickness of the stator core according to customer needs and performance requirements. It is easy to replace and has strong versatility.

[0013] 4. The inner side of the bottom slot of the insulating frame is left with a wall thickness that ensures the height of the safe creepage distance. The corresponding material thickness is removed from the inner side of the adjacent slot, and the outer side is increased with the corresponding material thickness. This structure can not only ensure the insulation between the insulating frame and the stator core, but also fix the two insulating frames to prevent them from falling off.

[0014] 5. A groove for fixing the terminal seat is reserved on the insulating frame, which can not only firmly fix the terminal seat and the insulating frame together, but also flexibly change the angle direction of the terminal seat according to needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 It is a structural schematic diagram of the insulating skeleton of the utility model;

[0017] Figure 2 This is a cross-sectional view of two insulating frames of the present invention being plugged in and fitted together;

[0018] Figure 3 It is a schematic diagram of the cooperation between two insulating frames and the stator core of the utility model;

[0019] Figure 4 This is a schematic diagram of the insulation frame and the lead-out terminal seat of the utility model;

[0020] In the figure: 1. Slot-type frame, 2. Stator core, 3. Positioning groove, 4. Lead-out terminal block, 5. Groove. DETAILED DESCRIPTION

[0021] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0022] As shown in the figure, a new type of plug-in insulating skeleton for a motor direct-wound stator includes two insulating skeletons installed in a plug-in manner. A plurality of slot-shaped skeletons 1 are arranged on the mirror surface of the two insulating skeletons, and adjacent slot-shaped skeletons 1 are designed with inner wall removal and outer wall removal intervals. The thickness of the inner wall removal is consistent with the thickness of the outer wall removal. The relative slot-shaped skeletons 1 are inserted into the positioning grooves 3 of the stator core 2 and then plugged in. The ends of the insulating skeletons are reserved with grooves 5 for fixing the lead-out terminal seat 4.

[0023] Eight slot-shaped frames 1 are provided on each insulating frame. That is, after one insulating frame is inserted into the stator core 2 according to the positioning slot, another insulating frame is rotated 45 degrees to be plugged into it.

[0024] The remaining length of the trough-shaped frame 1 is the height h of the safe creepage distance.

[0025] The groove 5 for fixing the lead-out terminal seat 4 is set as a C-shaped structure to fix the lead-out terminal seat 4 to the insulating frame.

[0026] The inner diameter of the grooved frame with the inner wall removed is slightly larger than the outer diameter of the grooved frame with the outer wall removed, so that the two can be plugged in and matched.

[0027] The insulating bobbin is injection-molded into a single unit based on the stator core slot dimensions. Half of the slotted bobbin remains at each end to mate with the stator core. At the bottom of the insulating bobbin, the wall thickness on the outside of one slot is left thick enough to ensure safe creepage distance, while the corresponding thickness is removed on the inside of the adjacent slot. Once one insulating bobbin is inserted into the stator core according to the positioning slot, the mirrored insulating bobbin is rotated 45°, one slot in the stator core, to mate with the original insulating bobbin, ensuring consistent bobbin thickness and insulation performance.

[0028] A groove for fixing the lead-out terminal seat is reserved at the corresponding position of the end of the insulating frame. After the two insulating frames are plugged in according to the requirements of the drawing, the lead-out terminal seat is fixed in the groove, and then the next operation process can be carried out.

[0029] This plug-in insulating bobbin structure offers advantages such as easy installation, low operating costs, minimal labor, and high versatility. This replaces the traditional method of integrally encapsulating the stator insulating bobbin and stator core with a separate plug-in structure where the stator core and insulating bobbin are separate. This structure offers stable quality, ease of use, safety, reliability, and a low scrap rate, making it an ideal design for direct-wound stator applications in motors. It also alleviates the challenges of low qualification rates and inspection difficulties associated with the previous structure.

[0030] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A novel plug-in insulating skeleton structure for a direct-wound stator of a motor, characterized by: The invention comprises two insulating frames installed in a plug-in manner, wherein a plurality of slot-shaped frames (1) are arranged on the mirrored surfaces of the two insulating frames, and adjacent slot-shaped frames (1) are designed with inner wall removal and outer wall removal, and the thickness of the inner wall removal is consistent with the thickness of the outer wall removal. The opposite slot-shaped frames (1) are inserted into the positioning grooves (3) of the stator core (2) and then plugged into each other, and the ends of the insulating frames are reserved with grooves (5) for fixing the lead-out terminal seat (4).

2. The structure of a novel plug-in insulating skeleton for a direct-wound stator of a motor according to claim 1 is characterized by: Eight slot-shaped frames (1) are provided on each insulating frame, that is, after one insulating frame is inserted into the stator core (2) according to the positioning slot, another insulating frame is rotated 45 degrees to be plugged into it.

3. The structure of a novel plug-in insulating skeleton for a direct-wound stator of a motor according to claim 1 is characterized by: The remaining length of the groove-shaped frame (1) without material removed is the height h of the safe creepage distance.

4. The structure of a novel plug-in insulating skeleton for a direct-wound stator of a motor according to claim 1 is characterized by: The groove (5) for fixing the lead-out terminal seat (4) is configured as a C-shaped structure, and fixes the lead-out terminal seat (4) to the insulating frame.

5. The structure of a novel plug-in insulating skeleton for a direct-wound stator of a motor according to claim 1 is characterized by: The inner diameter of the grooved frame with the inner wall removed is slightly larger than the outer diameter of the grooved frame with the outer wall removed, so that the two can be plugged in and matched.

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