Single-frame double-motor stator potting tool

Abstract

A stator potting fixture for a single-base dual-motor system is characterized in that: the potting fixture includes a base, a first core mold, a second core mold, and a top pressure plate; a circular boss is provided in the middle of the base, which is used for positioning and fitting the lower end of the motor housing; the base also has a wire hole for the lead wire to pass through; the first core mold is disposed inside the lower stator of the motor, and the bottom end face of the first core mold is positioned and fitted with the platform of the circular boss of the base through a first positioning concave-convex structure, and the top end face of the first core mold serves as a first mating surface; the second core mold is disposed inside the upper stator of the motor, and the bottom end face of the second core mold serves as a second mating surface, abutting against the first mating surface of the first core mold, and the two are positioned and fitted through a second positioning concave-convex structure; the top pressure plate is placed on the top of the second core mold and is fixedly connected to the top of the housing to press the second core mold and the first core mold downwards onto the base.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing, specifically to a stator potting fixture for a single-base dual-motor system. Background Technology

[0002] Early motors relied on structural seals (such as rubber gaskets and metal casings) for moisture and dust protection, but these seals were prone to aging over long-term use, leading to protection failure. Meanwhile, applications such as new energy vehicles and industrial automation require motors to operate stably in high-temperature, vibration, and corrosive environments, which traditional protection methods cannot adequately meet. With advancements in materials science, the emergence of high-performance potting materials such as epoxy resins, silicones, and polyurethanes has driven the development of motor potting processes.

[0003] Traditional stator potting fixtures and processes for motors are only applicable to ordinary motors (with only one motor stator in the frame). The potting process can be found in utility model patent CN102280975A, which discloses a motor stator core potting process.

[0004] Single-frame dual-motor, its stator structure is shown below. Figure 1 As shown, this is a special high-power motor with a long housing 1. Two stators 2 are axially arranged inside the housing 1, and lead wires 3 are provided at both ends of the housing 1. Suitable for a single-base, dual-motor structure, potting requires injection of adhesive from three locations: both ends and the middle of the housing 1 (i.e., the outer ends of the two stators and the middle joint area between the two stators). Traditional potting fixtures cannot achieve a single-pass potting, resulting in extremely low potting efficiency; potting one motor takes approximately 50 hours. Furthermore, lead wires are required at both ends of the fixture, and adhesive leakage between the wires must be prevented. Utility Model Content

[0005] The purpose of this invention is to provide a stator potting fixture for a single-base dual-motor system, so as to achieve one-time potting, improve potting efficiency, and reduce the risk of glue leakage.

[0006] To achieve the above objectives, the technical solution of the potting tooling adopted in this utility model is as follows:

[0007] A stator potting fixture for a single-base dual-motor system, wherein the single-base dual-motor system includes a housing and an upper stator and a lower stator coaxially disposed within the housing; the potting fixture includes a base, a first core mold, a second core mold, and a top pressure plate;

[0008] The base, the first core mold, and the second core mold are stacked coaxially in the vertical direction from bottom to top;

[0009] The base has a circular boss in the middle, which is used to position and fit the lower end of the motor housing. The base has a housing end face mating surface around the outer periphery of the circular boss, which abuts against the lower end face of the motor housing. The housing end face mating surface has a fixing hole for fasteners to pass through and fix to the housing. The base also has a wire hole for the lead wire to pass through.

[0010] The first core mold is disposed inside the lower stator of the motor. The bottom end face of the first core mold and the platform of the circular boss of the base are positioned and engaged by the first positioning concave and convex structure. The top end face of the first core mold serves as the first mating surface.

[0011] The second core mold is disposed inside the upper stator of the motor. The bottom end face of the second core mold serves as the second mating surface, abutting against the first mating surface of the first core mold. The two are positioned and engaged by a second positioning concave-convex structure provided on the first mating surface and the second mating surface.

[0012] The top pressure plate is placed on the top of the second core mold and is configured to be fixedly connected to the top of the housing so as to press the second core mold and the first core mold downwards onto the base;

[0013] A first injection radial flow channel is provided between the bottom end face of the first core mold and the platform of the circular boss of the base. The outer end of the first injection radial flow channel extends outward through an opening for alignment with the bottom end of the stator of the motor. The inner end of the first injection radial flow channel is connected to the first injection tube.

[0014] A second radial injection channel is provided between the first mating surface and the second mating surface. The outer end of the second radial injection channel extends outward through an opening for alignment between the two stators of the motor. The inner end of the second radial injection channel is connected to the second injection tube.

[0015] In the above scheme, both the first core mold and the second core mold are cylindrical with a central axial channel.

[0016] Furthermore, the lower end of the central axial channel of the first core mold is provided with a first stepped surface facing upwards, which is higher than the mating point between the lower end of the iron core of the lower stator of the motor and the step of the housing; a first vertical hole for inserting the first injection tube is opened on the first stepped surface, which is connected to the first injection radial flow channel.

[0017] Furthermore, the lower end of the central axial channel of the second core mold is provided with a second step surface facing upwards. This second step surface is higher than the mating point between the lower end of the iron core of the upper stator of the motor and the step of the housing. A second vertical hole for inserting the second injection tube is opened on the second step surface, which is connected to the second injection radial flow channel.

[0018] In the above scheme, the first positioning concave-convex structure and the second positioning concave-convex structure are each composed of a positioning boss coaxial with the motor and a positioning groove that cooperates with the positioning boss.

[0019] In the above scheme, a sealing ring is provided on the inner side of the inner end of the second injection radial flow channel between the first mating surface and the second mating surface to block the path of the second injection radial flow channel flowing into the central axial channel.

[0020] In the above scheme, a sealing ring is provided on the inner side of the inner end of the first injection radial flow channel between the bottom end face of the second core mold and the platform of the circular boss of the base, so as to block the path of the first injection radial flow channel to flow into the central axial channel.

[0021] This utility model has the following advantages:

[0022] This utility model features a specially designed "two-section tooling" consisting mainly of a base and two core molds, to meet the potting requirements of a single-base dual-motor system with three positions: two ends and the middle. This saves costs, has a compact structure, and can simultaneously pott at three positions, significantly reducing the potting process time. Attached Figure Description

[0023] Figure 1 This is a full sectional view of the housing and stator of the single-base dual-motor system to which this utility model applies;

[0024] Figure 2 This is a front view schematic diagram of the base of the potting fixture of this utility model, which shows the top surface of the base;

[0025] Figure 3 This is a front view schematic diagram of the first core mold of the potting tooling of this utility model, which shows the bottom end face of the first core mold;

[0026] Figure 4 for Figure 3 Schematic diagram of GG cross-section;

[0027] Figure 5 This is a front view schematic diagram of the second core mold of the potting tooling of this utility model, which shows the bottom end face of the second core mold;

[0028] Figure 6 for Figure 5 DD cross-sectional view;

[0029] Figure 7 This is a full cross-sectional schematic diagram of the potting tool of this utility model in the potting and use state.

[0030] In the above image:

[0031] 1. Housing;

[0032] 2. Stator; 21. Upper stator; 22. Lower stator;

[0033] 3. Lead out the wires;

[0034] 4. Potting fixtures;

[0035] 41. First core mold; 411. First mating surface; 412. First injection radial flow channel; 413. First stepped surface; 414. First vertical hole; 415. Positioning boss; 416. Positioning groove;

[0036] 42. Second core mold; 421. Second mating surface; 422. Second injection radial flow channel; 423. Second stepped surface; 424. Second vertical hole; 425. Positioning boss; 426. Lifting lug mounting hole;

[0037] 43. Base; 431. Circular boss; 432. Housing end face mating surface; 4321. Fixing hole; 433. Wire hole; 434. Positioning groove;

[0038] 44. Top pressure plate;

[0039] 51. First injection tube;

[0040] 52. Second injection tube;

[0041] 6. Sealing ring. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0043] Example 1: A stator potting fixture for a single-base dual-motor system: See [link / reference] Figure 1-7 As shown:

[0044] The housing and stator structure of the single-base dual-motor unit to be potted, such as Figure 1 As shown, it includes a housing 1 and two stators 2 coaxially disposed inside the housing 1 (which are the upper stator and the lower stator when placed vertically), and each of them has lead wires 3 at both ends.

[0045] The potting fixture 4 includes a base 43, a first core mold 41, a second core mold 42, and a top pressure plate 44.

[0046] When assembled and in use, the base 43, the first core mold 41, and the second core mold 42 are coaxially stacked vertically from bottom to top, as shown below. Figure 7 As shown.

[0047] The base 43, as Figure 2 and Figure 7As shown, a circular boss 431 is provided in the center and faces upward. The circular boss 431 is used for positioning and fitting the lower end of the motor housing 1. The base 43 has a housing end face mating surface 432 around the outer periphery of the circular boss 431 for mating with the lower end face of the motor housing 1. The housing end face mating surface 432 has a fixing hole 4321 for fasteners to pass through and fix to the housing 1. The base 43 also has a wire hole 433 for wires to pass through.

[0048] See Figures 3-4 and Figure 7 As shown, the first core mold 41 is disposed inside the lower stator 22 of the motor. The bottom end face of the first core mold 41 and the platform of the circular boss 431 of the base 43 are positioned and engaged by the first positioning concave and convex structure. The top end face of the first core mold 41 serves as the first mating surface 411.

[0049] See Figures 5-6 and Figure 7 As shown, the second core mold 42 is disposed inside the upper stator 21 of the motor. The bottom end surface of the second core mold 42 serves as the second mating surface 421, which abuts against the first mating surface 411 of the first core mold 41. The two are positioned and engaged by the second positioning concave-convex structure provided on the first mating surface 411 and the second mating surface 421.

[0050] See Figure 7 As shown, the top pressure plate 44 can be a single plate or a pressure bar. It is placed on the top of the second core mold 42 and is configured to be fixedly connected to the top of the housing 1 so as to press the second core mold 42 and the first core mold 41 downward onto the base 43.

[0051] See Figures 3-4 and Figure 7 As shown, a first injection radial flow channel 412 is provided between the bottom end face of the first core mold 41 and the platform of the circular boss 431 of the base 43. The outer end of the first injection radial flow channel 412 extends outward through an opening for alignment with the bottom end of the stator 2 of the motor. The inner end of the first injection radial flow channel 412 is connected to the first injection tube 51.

[0052] For details, please refer to [see details]. Figures 3-4 and Figure 7 As shown, the first injection radial flow channel 412 is opened on the bottom end face of the first core mold 41. In practice, opening the first injection radial flow channel on the platform of the circular boss 431 has the same effect, or it can be formed by opening half a groove on the bottom end face of the first core mold 41 and the platform of the circular boss 431 and then splicing them together.

[0053] See Figures 5-6 and Figure 7As shown, a second radial injection channel 422 is provided between the first mating surface 411 and the second mating surface 421. The outer end of the second radial injection channel 422 extends outward through an opening for alignment with the position between the two stators 21 and 22 of the motor. The inner end of the second radial injection channel 422 is connected to the second injection tube 52.

[0054] For details, please refer to [see details]. Figures 5-6 and Figure 7 As shown, the second injection radial flow channel 422 is formed on the second mating surface 421 of the second core mold 42. In practice, the same effect can be achieved by forming the second injection radial flow channel on the first mating surface 411, or by forming half a groove on each of the first mating surface 411 and the second mating surface 421 and then joining them together.

[0055] Specifically, both the first core mold 41 and the second core mold 42 are cylindrical with a central axial channel to accelerate heat dissipation of the core mold.

[0056] For details, please refer to [see details]. Figures 3-4 and Figure 7 As shown, the lower end of the central axial channel of the first core mold 41 is provided with a first stepped surface 413 facing upward. The first stepped surface 413 is higher than the lower end of the iron core of the lower stator 22 of the motor and the mating part of the step of the housing 1. A first vertical hole 414 for inserting the first injection tube 51 is opened on the first stepped surface 413, which is connected to the first injection radial flow channel 412.

[0057] For details, please refer to [see details]. Figures 5-6 and Figure 7 As shown, the lower end of the central axial channel of the second core mold 42 is provided with a second step surface 423 facing upward. The second step surface 423 is higher than the lower end of the iron core of the upper stator 21 of the motor and the step of the housing 1. A second vertical hole 424 for inserting the second injection tube 52 is opened on the second step surface 423, which is connected to the second injection radial flow channel 422.

[0058] The first positioning protrusion and the second positioning protrusion and the second positioning protrusion and the first positioning protrusion and the second positioning protrusion and the second positioning protrusion and the third ... third positioning protrusion and the third positioning protrusion and the third positioning respectively constitute a positioning pro

[0059] For details, please see [link / reference] Figures 3-4 and Figure 7 As shown, a positioning boss 415 protrudes downwards from the bottom end surface of the first core mold 41, as... Figure 2 and Figure 7 As shown, a positioning groove 434 corresponding to the positioning boss 415 is provided on the top surface of the base 43 to form a first positioning concave-convex structure.

[0060] For details, please see [link / reference] Figures 5-6 and Figure 7As shown, a positioning boss 425 protrudes downwards on the bottom end surface of the second core mold 42, as... Figures 3-4 and Figure 7 As shown, a positioning groove 416 is provided on the top surface of the first core mold 41 to match the positioning boss 425, so as to form a second positioning concave-convex structure.

[0061] In practice, the first and second positioning protrusions and grooves can also be formed by the combination of multiple positioning protrusions and positioning grooves.

[0062] A sealing ring 6 is provided on the inner side of the inner end of the second injection radial flow channel 422 between the first mating surface 411 and the second mating surface 421 to block the path of the second injection radial flow channel 422 flowing into the central axial channel. Figure 7 .

[0063] A sealing ring 6 is provided on the inner side of the inner end of the first injection radial flow channel 412 between the bottom end face of the second core mold 42 and the platform surface of the circular boss 431 of the base 43, to block the path of the first injection radial flow channel 412 flowing into the central axial channel. Figure 7 .

[0064] A sealing ring 6 is also provided on the outer periphery of the circular boss 431 of the base 43, so as to seal the gap between the base 43 and the lower port of the housing 1.

[0065] This utility model features a specially designed "two-section tooling" consisting mainly of a base and two core molds, to meet the potting requirements of a single-base dual-motor system with three positions: two ends and the middle. This saves costs, has a compact structure, and can simultaneously pott at three positions, significantly reducing the potting process time.

[0066] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A stator potting fixture for a single-base dual-motor system, wherein the single-base dual-motor system comprises a housing and an upper stator and a lower stator coaxially disposed within the housing; characterized in that: The potting fixture includes a base, a first core mold, a second core mold, and a top pressure plate; The base, the first core mold, and the second core mold are stacked coaxially in the vertical direction from bottom to top; The base has a circular boss in the middle, which is used to position and fit the lower end of the motor housing. The base has a housing end face mating surface around the outer periphery of the circular boss, which abuts against the lower end face of the motor housing. The housing end face mating surface has a fixing hole for fasteners to pass through and fix to the housing. The base also has a wire hole for the lead wire to pass through. The first core mold is disposed inside the lower stator of the motor. The bottom end face of the first core mold and the platform of the circular boss of the base are positioned and engaged by the first positioning concave and convex structure. The top end face of the first core mold serves as the first mating surface. The second core mold is disposed inside the stator of the motor. The bottom end face of the second core mold serves as the second mating surface, abutting against the first mating surface of the first core mold. The two are positioned and engaged by a second positioning concave-convex structure provided on the first mating surface and the second mating surface. The top pressure plate is placed on the top of the second core mold and is configured to be fixedly connected to the top of the housing so as to press the second core mold and the first core mold downwards onto the base; A first injection radial flow channel is provided between the bottom end face of the first core mold and the platform of the circular boss of the base. The outer end of the first injection radial flow channel extends outward through an opening for alignment with the bottom end of the stator of the motor. The inner end of the first injection radial flow channel is connected to the first injection tube. A second radial injection channel is provided between the first mating surface and the second mating surface. The outer end of the second radial injection channel extends outward through an opening for alignment between the two stators of the motor. The inner end of the second radial injection channel is connected to the second injection tube.

2. The potting fixture according to claim 1, characterized in that: Both the first and second core molds are cylindrical with a central axial channel.

3. The potting fixture according to claim 2, characterized in that: The lower end of the central axial channel of the first core mold is provided with a first step surface facing upwards. The first step surface is higher than the mating point between the lower end of the iron core of the lower stator of the motor and the step of the housing. A first vertical hole for inserting the first injection tube is opened on the first step surface, which is connected to the first injection radial flow channel.

4. The potting fixture according to claim 2, characterized in that: The lower end of the central axial channel of the second core mold is provided with a second step surface facing upwards. This second step surface is higher than the mating point between the lower end of the iron core of the upper stator of the motor and the step of the housing. A second vertical hole for inserting the second injection tube is opened on the second step surface, which is connected to the second injection radial flow channel.

5. The potting fixture according to any one of claims 1-4, characterized in that: The first positioning protrusion and the second positioning protrusion and the second positioning protrusion and the first positioning protrusion and the second positioning protrusion and the second positioning protrusion are each composed of a positioning boss coaxial with the motor and a positioning groove that mates with the positioning boss.

6. The potting fixture according to claim 2, characterized in that: A sealing ring is provided on the inner side of the inner end of the second injection radial flow channel between the first mating surface and the second mating surface to block the path of the second injection radial flow channel to flow into the central axial channel.

7. The potting fixture according to claim 2, characterized in that: A sealing ring is provided on the inner side of the inner end of the first injection radial flow channel between the bottom end face of the second core mold and the platform of the circular boss of the base, so as to block the path of the first injection radial flow channel to flow into the central axial channel.

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