Sealing support, stator and motor
By forming a sealed structure with the injection mold through the boss structure of the sealing bracket, the problems of complex sheath structure and injection molding affecting terminal conductivity are solved, ensuring terminal conductivity and improving the stability and service life of the motor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-04-03
AI Technical Summary
In existing technologies, the sheath structure is complex, the injection molding process affects the conductivity of the terminals, and increases manufacturing costs.
The boss structure of the sealing bracket forms a sealed structure with the injection mold, preventing the injection plastic from covering the exposed part of the terminal. The terminal is sealed by the bracket and the injection mold to ensure the conductivity of the terminal.
It effectively prevents the injection plastic from entering the terminal hole during the injection molding process, ensures the conductivity of the terminal, improves the overall strength and stability of the sealing bracket, and extends the service life of the motor.
Smart Images
Figure CN224083293U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, specifically to an electronic stator, and more particularly to a sealed bracket, a stator, and a motor. Background Technology
[0002] A stator frame is injection molded into the inner groove of the stator core using an integral injection molding method, and then encapsulated after the windings and terminals are installed. This allows the stator of the motor to better prevent the stator core from directly contacting moisture, dust and other contaminants in the external environment, avoiding a decline in the insulation performance of motor components and preventing corrosion, deformation or damage to the surface of the stator core.
[0003] In injection-molded stator technology, the injection material completely encapsulates part of the terminals, forming an effective protective layer to prevent external environmental factors such as moisture, dust, and corrosive substances from directly contacting the terminals, thereby extending their service life. However, the pressure during injection molding can cause terminal displacement or deformation, which not only increases the product defect rate but also adds to manufacturing costs. To solve this problem, existing injection-molded stators use sheaths to protect the terminals, but the sheath structure is complex, and during injection molding, some of the injection material covers the exposed surface of the terminals, affecting their conductivity. Utility Model Content
[0004] The technical problem to be solved by this utility model is: in order to solve the technical problem that the sheath structure is complex and injection molding can affect the conductivity of the terminal in the prior art, this utility model provides a sealing bracket, stator and motor, which forms a sealing structure to isolate the terminal through the bracket and injection mold, thereby preventing the injection plastic from covering the exposed part of the terminal and affecting the conductivity of the terminal.
[0005] The technical solution adopted by this utility model to solve its technical problem is: a sealing bracket, comprising: a bracket body, the bracket body being disposed on a stator; a boss structure, the boss structure being disposed on the bracket body and having a terminal hole for the stator terminal to be inserted; the bracket body being assembled with an injection mold, the injection mold having a cavity, the boss structure being in sealed contact with the injection mold, thereby covering the portion of the terminal exposed in the terminal hole.
[0006] The sealing bracket of this utility model adopts a boss structure to set the terminal hole, and the boss structure and the injection molding die form a sealing structure to prevent the injection plastic from entering the interior of the boss structure during the injection process, thereby ensuring that the terminal is not affected by the injection plastic and effectively ensuring the conductivity of the terminal.
[0007] Furthermore, in order to ensure that the boss structure and the injection mold can seal the terminal, the boss structure includes a first boss and a second boss located on the support body, the bottom part of the injection mold is disposed on the first boss, and a portion of the inner wall of the cavity is in circumferential sealing contact with the second boss.
[0008] Furthermore, to prevent the bracket from being damaged due to friction between the second boss and the injection mold during assembly, the second boss has an inclined chamfer in the circumferential direction.
[0009] Furthermore, in order to enable the insertion of the terminal, the terminal hole extends through the first boss and the second boss.
[0010] Furthermore, in order to achieve sealing of the terminals and ensure the strength of the boss structure, the outer diameter of the first boss is larger than the outer diameter of the second boss, and the thickness of the first boss is smaller than the thickness of the second boss.
[0011] Furthermore, in order to further optimize the sealing effect, the outer diameter of the first boss is 1 / 2 to 2 / 3 of the width of the bracket body.
[0012] Furthermore, in order to achieve tight assembly of the injection mold, the bracket body also includes a mounting protrusion, which is disposed radially inside the first boss. When the mounting protrusion comes into contact with the injection mold, it is flattened and becomes part of the first boss.
[0013] Furthermore, in order to support the support body, the lower part of the support body has at least one support column, which abuts against the stator.
[0014] Furthermore, in order to support the bracket body, the lower part of the bracket body has a baffle corresponding to the boss structure, and the baffle abuts against the terminal slot of the stator.
[0015] Furthermore, to prevent the terminal bracket from loosening or falling off due to external forces, the terminal is inserted upward along the baffle and extends out of the boss structure.
[0016] Another technical solution adopted by this utility model to solve its technical problem is: a stator, wherein the stator is provided with the above-mentioned sealing bracket, the stator and the seal are integrally formed by injection molding, and the injection molded body is isolated from the terminal by the boss structure of the sealing bracket and the injection mold.
[0017] Another technical solution adopted by this utility model to solve its technical problem is: an electric motor, including the stator mentioned above.
[0018] Compared with the prior art, the beneficial effects of this utility model are:
[0019] 1. The sealing bracket, stator and motor of this utility model are positioned by the terminal hole of the boss structure of the sealing bracket. The boss structure and the injection mold seal and enclose the terminal, preventing the injection molded body from entering the boss and contacting the terminal during the injection process, thus ensuring that the terminal has good conductivity.
[0020] 2. The sealing bracket, stator and motor of this utility model are supported by the column sealing bracket to prevent deformation or displacement of the sealing bracket due to pressure and vibration during the injection molding process, thereby improving the overall strength and stability of the sealing bracket.
[0021] 3. The sealing bracket, stator and motor of this utility model fix the terminals with baffles, further supporting the terminals and resisting the pressure brought by injection molding, thereby ensuring that the terminals will not loosen or fall off when subjected to external forces.
[0022] 4. The sealing bracket, stator and motor of this utility model are sealed together by injection molding, which effectively prevents harmful substances such as water vapor and oxygen in the air from corroding or oxidizing the bracket and stator, thereby extending the service life of the motor. Attached Figure Description
[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0024] Figure 1 This is a schematic diagram of the sealing bracket of this utility model;
[0025] Figure 2 This is a schematic diagram showing the connection status between the sealing bracket and the stator;
[0026] Figure 3 for Figure 2 A partial structural diagram;
[0027] Figure 4 This is a cross-sectional view of the stator and sealing bracket after injection molding;
[0028] Figure 5 This is a schematic diagram of the stator and sealing bracket after injection molding;
[0029] In the picture:
[0030] 1. Bracket body; 11. Boss structure; 111. Terminal hole; 112. First boss; 113. Second boss; 114. Inclined chamfer; 12. Mounting protrusion; 13. Support column; 14. Baffle.
[0031] 2. Stator; 21. Terminal; 22. Terminal slot;
[0032] 3. Injection mold; 31. Cavity; 32. Injection body. Detailed Implementation
[0033] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.
[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0036] Example 1, such as Figures 1 to 4 As shown, a sealing bracket includes an arc-shaped bracket body 1. A boss structure 11 is disposed on the bracket body 1 and has a terminal hole 111 for inserting a terminal 21 of a stator 2. The bracket body 1 is assembled with an injection mold 3, which has a cavity 31. The boss structure 11 is in sealing contact with the injection mold 3, thereby covering the portion of the terminal 21 exposed in the terminal hole 111. The injection mold 3 and the boss structure 11 cover the terminal 21, preventing the injection molded body 32 from entering the boss structure 11 and the cavity 31 during subsequent injection molding, thus ensuring that the terminal 21 inside the cavity 31 does not contact the injection molded body 32 and effectively ensuring the conductivity of the terminal 21.
[0037] like Figure 1As shown, the boss structure 11 includes a first boss 112 and a second boss 113 located on the support body 1. The bottom portion of the injection mold 3 is disposed on the first boss 112, and a portion of the inner wall of the cavity 31 is in circumferential sealing contact with the second boss 113. The first step can position and install the injection mold 3, and the end face of the first boss 112 and the side face of the second boss 113 form a complete sealing surface with the inner end face of the injection mold 3, ensuring the airtightness of the cavity 31 and effectively preventing the injection molded body 32 from entering the cavity 31.
[0038] Preferably, the second boss 113 has an inclined chamfer 114 in the circumferential direction. When the injection mold 3 contacts the second boss 113, the inclined chamfer 114 can prevent the edges of the injection mold 3 and the second boss 113 from rubbing against each other, and prevent the second boss 113 from wearing and affecting the sealing performance.
[0039] Specifically, terminal hole 111 extends through the first boss 112 and the second boss 113. Terminal hole 111 is vertically formed on the first boss 112 and the second boss 113, allowing terminal 21 to pass smoothly through terminal hole 111. Simultaneously, the outer diameter of the first boss 112 is larger than the outer diameter of the second boss 113. The first boss 112 abuts against the injection mold 3, ensuring that no injection plastic enters the cavity 31. The thickness of the first boss 112 is less than the thickness of the second boss 113, and the greater thickness of the second boss 113 further prevents injection plastic from entering the cavity 31.
[0040] Specifically, the outer diameter of the first boss 112 is smaller than the width of the bracket body 1. Preferably, the outer diameter of the first boss 112 is 1 / 2 to 2 / 3 of the width of the bracket body 1. If the outer diameter is too large, the sealing performance will be reduced, and if the outer diameter is too small, the mold precision requirements will be higher.
[0041] In Example 2, based on Example 1, the bracket body 1 further includes a mounting protrusion 12. The mounting protrusion 12 is disposed radially inside the first protrusion 112. When the mounting protrusion 12 abuts against the injection mold 3, it is flattened and becomes as shown in the figure. Figure 4 The first boss 112 shown is part of the molded mold and the sealing bracket, so that the molded mold and the sealing bracket fit more tightly and prevent the BMC from flowing into the cavity 31 and covering the terminal 21 inside it.
[0042] In Example 3, based on Example 2, the lower part of the support body 1 has at least one support column 13. After the support body 1 is connected to the stator 2, the support column 13 abuts against the stator 2. The bottom of the support column 13 is located on the stator 2 between the terminals 21, and the support column 13 can provide support for the support body 1. During injection molding, the support column 13 can effectively fix the terminals 21, preventing the terminals 21 from shifting or deforming due to pressure or vibration during the injection molding process. At the same time, the support column 13 can also enhance the overall strength and stability of the support, making the overall structure of the stator 2 more robust and durable.
[0043] In Example 4, based on Example 3, the lower part of the bracket body 1 has a baffle 14 corresponding to the boss structure 11. After the bracket body 1 is connected to the stator 2, the baffle 14 abuts against the terminal slot 22 of the stator 2. The terminal 21 is inserted upward along the baffle 14 and extends out of the boss structure 11. The baffle 14 provides upward support for the bracket body 1. At the same time, the baffle 14 contacts the lower half of the terminal 21, which can resist the pressure brought by injection molding, so as to ensure that the wiring terminal 21 on the bracket will not loosen or fall off when subjected to external force, thereby achieving further fixation of the wiring terminal 21.
[0044] like Figure 5 As shown, a stator is provided with the aforementioned sealing bracket. The stator 2 and the sealing bracket are integrally formed by injection molding, and the injection molded body 32 is isolated from the terminal 21 by the boss structure 11 of the sealing bracket and the injection mold 2. Generally, four sealing brackets are assembled with one stator to form a whole by injection molding.
[0045] An electric motor, comprising the stator described above.
[0046] In summary, this utility model discloses a sealing bracket, a stator, and a motor. The bracket and the injection mold form a sealing structure for isolating the terminals, thereby preventing the injection molding material from covering the exposed part of the terminals and affecting the conductivity of the terminals.
[0047] The above description is based on the preferred embodiments of this utility model. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.
Claims
1. A sealed stent, characterized by, The application relates to a sealing bracket for a terminal of a stator. The sealing bracket comprises: a bracket body (1) arranged on the stator (2); a boss structure (11) arranged on the bracket body (1) and having a terminal hole (111) for inserting a terminal (21) of the stator (2); 2. The sealed stent of claim 1, wherein, the bracket body (1) is assembled into an injection mold (3) having a cavity (31), the boss structure (11) is in sealing contact with the injection mold (3), so that the cavity (31) covers the part of the terminal (21) exposed from the terminal hole (111).
3. The sealed stent of claim 2, wherein, The boss structure (11) comprises a first boss (112) and a second boss (113) arranged on the bracket body (1), a bottom part of the injection mold (3) is arranged on the first boss (112), and a part of an inner wall of the cavity (31) is in sealing contact with a periphery of the second boss (113).
4. The sealed stent of claim 3, wherein, The second boss (113) has an inclined chamfer (114) on the periphery.
5. The sealed stent of claim 4, wherein, The terminal hole (111) penetrates the first boss (112) and the second boss (113).
6. The sealed stent of claim 5, wherein, An outer diameter of the first boss (112) is larger than that of the second boss (113), and a thickness of the first boss (112) is smaller than that of the second boss (113).
7. The sealed stent of any one of claims 2-6, wherein, The outer diameter of the first boss (112) is 1 / 2-2 / 3 of the width of the bracket body (1).
8. The sealed stent of claim 1, wherein, The sealing bracket further comprises a mounting protrusion (12) arranged on a radially inner side of the first boss (112), the mounting protrusion (12) is flattened and becomes a part of the first boss (112) when abutting against the injection mold (3).
9. The sealed stent of claim 1, wherein, A lower part of the bracket body (1) has at least one support column (13) abutting against the stator (2).
10. The sealed stent of claim 9, wherein, The lower part of the bracket body (1) has a baffle (14) corresponding to the boss structure (11), the baffle (14) abuts against a terminal notch (22) of the stator (2).
11. A stator characterized by, The terminal (21) is inserted upwards along the baffle (14) and protrudes from the boss structure (11).
12. An electric machine characterized by The stator (2) is provided with the sealing bracket as claimed in any one of claims 1-10, the stator (2) and the sealing bracket are integrally formed by injection molding, and the boss structure (11) and the injection mold (3) of the sealing bracket isolate an injection body (32) from the terminal (21). The application further relates to a stator (2) as claimed in claim 11. The application relates to a sealing bracket for a terminal of a stator. The sealing bracket comprises: a bracket body (1) arranged on the stator (2); a boss structure (11) arranged on the bracket body (1) and having a terminal hole (111) for inserting a terminal (21) of the stator (2); the bracket body (1) is assembled into an injection mold (3) having a cavity (31), the boss structure (11) is in sealing contact with the injection mold (3), so that the cavity (31) covers the part of the terminal (21) exposed from the terminal hole (111). The boss structure (11) comprises a first boss (112) and a second boss (113) arranged on the bracket body (1), a bottom part of the injection mold (3) is arranged on the first boss (112), and a part of an inner wall of the cavity (31) is in sealing contact with a periphery of the second boss (113). The second boss (113) has an inclined chamfer (114) on the periphery. The terminal hole (111) penetrates the first boss (112) and the second boss (113). An outer diameter of the first boss (112) is larger than that of the second boss (113), and a thickness of the first boss (112) is smaller than that of the second boss (113). The outer diameter of the first boss (112) is 1 / 2-2 / 3 of the width of the bracket body (1). The sealing bracket further comprises a mounting protrusion (12) arranged on a radially inner side of the first boss (112), the mounting protrusion (12) is flattened and becomes a part of the first boss (112) when abutting against the injection mold (3). A lower part of the bracket body (1) has at least one support column (13) abutting against the stator (2). The lower part of the bracket body (1) has a baffle (14) corresponding to the boss structure (11), the baffle (14) abuts against a terminal notch (22) of the stator (2). The terminal (21) is inserted upwards along the baffle (14) and protrudes from the boss structure (11). The stator (2) is provided with the sealing bracket as claimed in any one of claims 1-10, the stator (2) and the sealing bracket are integrally formed by injection molding, and the boss structure (11) and the injection mold (3) of the sealing bracket isolate an injection body (32) from the terminal (21). The application further relates to a stator (2) as claimed in claim 11.