Stator notch potting enclosure device

Abstract

The invention relates to manufacturing of motor stators, in particular to a stator notch potting enclosure device which comprises an annular enclosure body, the enclosure body is formed by splicing a first blocking body, a second blocking body and two third blocking bodies, and the first blocking body and the second blocking body are oppositely arranged. The third blocking bodies are respectively arranged between the adjacent end parts of the first blocking body and the second blocking body; the inner sides of the two third blocking bodies are connected through a telescopic mechanism capable of extending or retracting in the radial direction of the fence body, when the telescopic mechanism extends, the two third blocking bodies are embedded between the first blocking body and the second blocking body in the radial direction of the fence body, and when the telescopic mechanism retracts, the two third blocking bodies are embedded between the first blocking body and the second blocking body in the radial direction of the fence body. The two third blocking bodies are separated from the first blocking body and the second blocking body in the radial direction of the surrounding blocking body. According to the invention, the stator notch enclosure tool can be withdrawn without axial drawing, and the protection effect of notch potting and filling is ensured.

Description

Technical Field

[0001] The invention relates to the production of a motor stator, in particular to a stator slot potting enclosure device. Background Art

[0002] At present, in the design of some models of traction motor stators, in order to enhance the anti-sand and anti-foreign-object performance of the stator during operation and improve the insulation and mechanical properties of the stator, it is required to use potting glue to fill the stator slot for protection. When performing the stator slot potting operation, it is necessary to seal the inside of the stator slot with a blocking tool to ensure that the potting glue is solid after the potting glue is poured into the slot, and the blocking tool is removed after high-temperature baking and curing.

[0003] like Figure 1 As shown, the existing stator slot potting enclosure tooling is an integrally formed annular enclosure structure. During the potting operation, the enclosure tooling is installed on the inner side of the stator slot to achieve potting and sealing protection of the inner cavity of the stator slot. The existing enclosure tooling has several shortcomings: First, after the potting glue is cured, the entire circle of the enclosure tooling is adhered to the potting glue at the slot, and the overall adhesion area is large, making it difficult to withdraw the enclosure tooling; second, when the entire enclosure tooling is withdrawn from the slot, the tooling needs to be pulled out along the axial direction of the stator. Due to the large overall bonding surface and large force, the slot potting glue is easily pulled upward and displaced, resulting in a gap between the iron core and the potting glue, affecting the protective effect after the slot potting glue is filled. Summary of the invention

[0004] The technical problem to be solved by the present invention is to propose a stator slot potting enclosure device in view of the problems existing in the stator slot potting enclosure tooling, so as to solve the problems that the enclosure tooling is inconvenient to withdraw and the potting glue is easily displaced due to the strong pulling force when the enclosure is withdrawn in the existing operation method.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A stator slot potting enclosure device comprises an annular enclosure body, wherein:

[0007] The enclosure body is formed by splicing a first block body, a second block body and two third block bodies, the first block body and the second block body are arranged opposite to each other, and the third block bodies are respectively installed between adjacent ends of the first block body and the second block body;

[0008] The inner sides of the two third block bodies are connected via a telescopic mechanism that can extend or retract radially along the enclosing body. When the telescopic mechanism is extended, the two third block bodies are embedded between the first block body and the second block body along the radial direction of the enclosing body. When the telescopic mechanism is retracted, the two third block bodies are separated from the first block body and the second block body along the radial direction of the enclosing body.

[0009] The enclosure body of the present invention is formed by splicing structural parts, and the inner sides of the two third enclosure bodies are connected by a telescopic mechanism that can extend or retract along the radial direction of the enclosure body. In this way, the enclosure body can be assembled or disassembled by extending or retracting the telescopic mechanism, so that the enclosure body can be conveniently spliced ​​into one piece for potting and sealing protection by extending the telescopic mechanism before potting. After potting and solidification, the enclosure body can be partially disassembled by retracting the telescopic mechanism (in this process, the potting is only subjected to the radial tension of the stator), which not only facilitates the withdrawal of the enclosure body, but also avoids the pulling and displacement of the slot potting glue caused by the overall pulling and withdrawal of the enclosure body along the axial direction of the stator, thereby affecting the protective effect after the slot potting glue is filled.

[0010] Preferably, threaded rods are respectively installed on the inner sides of the two third stoppers, the threads on the two threaded rods have opposite rotation directions, and the two threaded rods are respectively threadedly connected to one end of the sleeve. When the sleeve is rotated, the two tensioning stoppers and the third stoppers are embedded in or disengaged from the first stopper and the second stopper along the radial direction of the enclosure body.

[0011] Preferably, first beveled surfaces are respectively provided at the ends of the first stopper and the second stopper, second beveled surfaces are respectively provided at both ends of the third stopper, and the inner arc length of the third stopper is greater than the outer arc length, and the first beveled surface cooperates with the second beveled surface to achieve sliding connection.

[0012] Preferably, a key or a groove is arranged on the first beveled surface, and a groove or a key is arranged on the second beveled surface, and the first beveled surface and the second beveled surface are connected by the cooperation of the key and the groove.

[0013] Preferably, a handle is provided on the sleeve to facilitate the rotation of the sleeve.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention solves the problems in the original operation mode such as the inconvenience in withdrawing the enclosure tooling and the displacement of the potting glue caused by the strong axial pulling when the enclosure is withdrawn.

[0016] 2. The present invention adopts spliced ​​structural parts. Adjacent spliced ​​structural parts are connected by a combination of keys and grooves. The loosening and tightening operation can be performed by twisting the sleeve, thereby playing the role of connecting and fixing the enclosure body. The operation is convenient and reliable.

[0017] 3. The present invention can realize partial withdrawal of each splicing piece of the enclosure tooling one by one after the potting glue is solidified, effectively avoiding the phenomenon of difficulty in withdrawal, strong axial pulling force, and colloid displacement that occur during the use of the integrated structure enclosure tooling.

[0018] 4. The present invention can retain the core structure and its operation method by changing the size of each spliced ​​structural member to be suitable for the slot filling operation of stators of different sizes. At the same time, the withdrawal method and device of the present invention have the advantages of simple application, good effect, and applicability to batch operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a structural schematic diagram of the existing encapsulation enclosure tooling.

[0021] Figure 2 This is a schematic diagram of the structure of the device of the present invention after being assembled.

[0022] Figure 3 It is a structural schematic diagram of the splicing process of the device of the present invention.

[0023] Figure 4 It is a schematic diagram of the main structure of the device of the present invention.

[0024] Figure 5 for Figure 4 A-A cross-sectional structure diagram. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, 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; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figure 2-Figure 5 An embodiment of the stator slot potting enclosure device of the present invention includes an annular enclosure body, which is formed by splicing a first enclosure body 1, a second enclosure body 2 and two third enclosure bodies 3. The first enclosure body 1 and the second enclosure body 2 are arranged opposite to each other, and the third enclosure bodies 3 are respectively installed between the adjacent ends of the first enclosure body 1 and the second enclosure body 2. Threaded rods 4 are respectively installed on the inner sides of the two third enclosure bodies 3, and the threads on the two threaded rods 4 are opposite to each other. The two threaded rods 4 are respectively connected to one end of a sleeve 5 through threads. When the sleeve 5 is rotated, the two third enclosure bodies 3 are embedded in or separated from the adjacent ends of the first enclosure body 1 and the second enclosure body 2 along the radial direction of the enclosure body.

[0029] When the present invention is used, the third block body 3 is inserted between the first block body 1 and the second block body 2 along the radial direction of the enclosure body by twisting the sleeve 5 to splice the enclosure body, thereby forming a potting enclosure protection at the inner cavity of the stator slot. After the potting glue is filled and baked and solidified, when the enclosure body is removed, the opposite method of the installation operation can be adopted. First, the sleeve 5 is twisted to separate the third block body 3 from the first block body 1 and the second block body 2 along the radial direction of the enclosure body, and then the first and second block bodies 1 and 2 are taken out from the side of the stator slot. In this way, the axial withdrawal of the original enclosure tooling is changed to radial withdrawal, which effectively avoids the situation that the integrated structure enclosure tooling is difficult to withdraw and the pulling force is too large due to large-area adhesion with the potting glue, and also avoids the phenomenon that the potting glue is displaced upward due to the original enclosure tooling using axial force to pull out vigorously, thereby ensuring the protective effect of the stator slot potting filling.

[0030] It should be noted that, in the present embodiment, the threaded rod and the sleeve are used to cooperate to realize the embedding or disengagement of the two third stoppers, but the present invention is not limited to this. Obviously, as long as the two third stoppers 3 can be embedded or disengaged along the radial direction of the enclosure body, the telescopic mechanism between the adjacent ends of the first stopper 1 and the second stopper 2 can realize the function of the present invention.

[0031] A first chamfered surface 6 is respectively provided at the end of the first stopper 1 and the end of the second stopper 2, and a second chamfered surface 7 is respectively provided at both ends of the third stopper 3, and the inner arc length of the third stopper 3 is greater than the outer arc length, a key or a groove is provided on the first chamfered surface 6, and a groove or a key is provided on the second chamfered surface 7, and the first chamfered surface 6 and the second chamfered surface 7 are connected by sliding guides through the cooperation of the key and the groove.

[0032] The sleeve 5 is provided with a handle 8 to facilitate the rotation of the sleeve 5 .

[0033] The above is only a specific implementation scheme of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the art can make many possible changes and modifications to the technical scheme of the present invention by using the technical content disclosed above without departing from the scope of the technical scheme of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical scheme of the present invention should fall within the protection scope of the technical scheme of the present invention.

Claims

1. A stator slot potting enclosure device, comprising an annular enclosure body, characterized in that: The enclosure body is formed by splicing a first block body, a second block body and two third block bodies, the first block body and the second block body are arranged opposite to each other, and the third block bodies are respectively installed between adjacent ends of the first block body and the second block body; The inner sides of the two third block bodies are connected via a telescopic mechanism that can extend or retract radially along the enclosing body. When the telescopic mechanism is extended, the two third block bodies are embedded between the first block body and the second block body along the radial direction of the enclosing body. When the telescopic mechanism is retracted, the two third block bodies are separated from the first block body and the second block body along the radial direction of the enclosing body.

2. The stator slot potting enclosure device according to claim 1, characterized in that: Threaded rods are respectively installed on the inner sides of the two third stoppers, the threads on the two threaded rods are in opposite directions, and the two threaded rods are respectively threadedly connected to one end of the sleeve. When the sleeve is rotated, the two third stoppers are embedded in or detached from the first stopper and the second stopper along the radial direction of the enclosure body.

3. The stator slot potting enclosure device according to claim 2, characterized in that: A handle is arranged on the sleeve.

4. The stator slot potting enclosure device according to any one of claims 1 to 3, characterized in that: The ends of the first stopper and the second stopper are respectively provided with first beveled surfaces, the two ends of the third stopper are respectively provided with second beveled surfaces, and the inner arc length of the third stopper is greater than the outer arc length, and the first beveled surface cooperates with the second beveled surface to achieve sliding connection.

5. The stator slot potting enclosure device according to claim 4, characterized in that: A key or a groove is arranged on the first beveled surface, and a groove or a key is arranged on the second beveled surface. The first beveled surface and the second beveled surface are connected by the cooperation of the key and the groove.

Images