A glue-filling mold and glue-filling method for a torque converter stationary ring assembly

Abstract

This invention discloses a potting mold and potting method for a torque converter coil assembly. The potting mold for the torque converter coil assembly includes a mold body, which is a cylindrical structure closed at the bottom. A positioning boss is formed at the bottom of the mold body; the upper end of the mold body slopes outward and extends to form a guide platform. The method includes: S1, installing the coil assembly onto the torque converter frame, then inverting the torque converter frame and inserting it into the potting mold; S2, preparing the adhesive and evacuating the adhesive; S3, injecting the adhesive to submerge the coil, then placing it in a vacuum environment; S4, removing the torque converter coil assembly and the potting mold from the vacuum environment, and injecting adhesive again to fill the entire potting channel; S5, shaping and drying the potted structure, then demolding and finishing. This invention can remove air bubbles in the potting channel, facilitating potting and ensuring reliable performance and a high pass rate for the completed torque converter coil assembly.

Description

Technical Field

[0001] This invention relates to the field of torque converter technology, specifically to a potting mold and potting method for a torque converter retaining ring assembly. Background Art

[0002] A torque converter converts electrical signals (current or current pulses) into torque (or force) and is a crucial component in gyroscopes and accelerometers. In a gyroscope, the torque converter applies torque to the gyroscope's output shaft, causing it to precess rhythmically to keep the rotor shaft aligned in a specific direction, such as parallel to the local vertical or local meridian. Similarly, in pendulum accelerometers, a balancing torque is applied to the inertial mass pendulum to maintain its equilibrium position.

[0003] The torque converter frame of a flexible gyroscope is generally made of machinable ceramic with high strength, weather resistance, and durability. However, due to the size of the flexible gyroscope and the working space of the torque converter, the machinable ceramic frame of the torque converter coil assembly is a hollow, thin-walled part, and the working coil is fixed to the machinable ceramic frame with adhesive on the outside.

[0004] See Figure 1 The existing torque converter potting mold includes a potting film base 1a and a potting film outer ring 2a. The outer ring 2a is located outside the torque converter frame 3a and is fixed to the potting film base by a locking nut 4a. A coil 5a is wound around the outside of the torque converter frame 3a. The potting channel is between the outer ring 2a and the torque converter frame 3a. To prevent the adhesive from entering the inside of the torque converter frame, an additional fixing block 6a is required. The fixing block 6a is placed on the upper side of the torque converter frame 3a and is fixed to the potting film base 1a by a locking screw 7a, thus sealing the inside of the torque converter frame 3a. The addition of the fixing block 6a increases the installation steps in manufacturing the potting mold and increases the cost of potting. In addition, the existing potting structure has the defect of not being able to expel the gas at the bottom of the channel during potting. The gas inside the adhesive and between the adhesive and the torque converter frame is not easy to escape, which makes the frame prone to cracking after the torque converter coil assembly is processed, resulting in a low finished product yield. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, the present invention aims to solve the problems of complex glue-filling structures, high glue-filling costs, and difficulty in venting air during glue-filling, which leads to easy cracking of the frame and low yield of finished products after the torque converter stator assembly is processed. The present invention provides a glue-filling mold and glue-filling method for a torque converter stator assembly, which can expel air bubbles in the glue-filling channel, facilitate glue-filling, and ensure reliable performance and high yield of the torque converter stator assembly after processing.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A potting mold for a torque converter retaining ring assembly includes a mold body, which is a cylindrical structure with a closed lower end. A positioning boss is formed at the bottom of the mold body, and the axis of the positioning boss coincides with the axis of the mold body. The upper end of the mold body is inclined outward and extends to form a guide platform.

[0008] By setting a positioning boss, the centerline of which coincides with the centerline of the mold body, the torque converter frame can be inverted and its upper end inserted into the glue-pouring mold. The boss then limits the position of the torque converter frame, resulting in a simple structure and convenient installation. An outward-sloping guide platform is formed at the upper end of the mold body. This allows the glue to flow downwards through the guide platform, facilitating the expulsion of gas at the bottom of the channel. This reduces the likelihood of cracking between the glue and the torque converter frame, improving the yield rate of the finished product.

[0009] Furthermore, the diameter of the positioning boss is consistent with the inner diameter of the torque generator frame, thus making the positioning of the positioning boss more accurate.

[0010] Furthermore, it also includes a pressure plate, which is connected to the bottom of the mold body by a locking bolt. The pressure plate has a through hole in its center, and a locking screw hole is provided in the center of the positioning boss. This locking screw hole extends along the axis of the mold body through the bottom of the mold body. The locking bolt passes through the through hole and connects to the screw hole. The pressure plate fixes the position of the torque converter frame, facilitating the glue-pouring operation.

[0011] The present invention also provides a method for potting a torque converter retaining ring assembly, which uses the potting mold of the torque converter retaining ring assembly and specifically includes the following steps:

[0012] S1. Install the coil assembly onto the torque converter frame, then invert the torque converter frame with the coil installed and insert it into the potting mold. Limit the position by the positioning boss to form a potting channel between the torque converter frame, the coil assembly and the potting mold.

[0013] S2. Prepare the adhesive solution and vacuum the adhesive solution;

[0014] S3. Inject the vacuum-treated adhesive into the potting channel to submerge the coil. Then, place the torque converter coil assembly and potting mold into a vacuum environment and evacuate at a rate of 0.5 to 1 L / s for 30 seconds.

[0015] S4. Remove the torque converter retaining ring assembly and the potting mold from the vacuum environment, and inject adhesive into the potting channel again to fill the entire potting channel.

[0016] S5. After the glued structure is shaped, dried, demolded, and precision machined, the torque converter retaining ring assembly is obtained.

[0017] During the glue-pouring process, the glue is first evacuated, then the evacuated glue is poured in until it submerges the coil. Next, the torque converter stator assembly and the glue-pouring mold are evacuated again. This double evacuation process removes gas from the glue, ensuring no air bubbles in the glue layer. The glue adheres tightly to the torque converter frame and coil, resulting in high glue layer stability and improved yield of the torque converter stator assembly. The use of this glue-pouring mold for the torque converter stator assembly also reduces the likelihood of cracking between the glue and the torque converter frame, improving the finished product yield. Furthermore, it offers advantages such as convenient glue pouring, simple tooling, and easy demolding.

[0018] In step S2, the adhesive is heated to 60°C and held at that temperature for approximately 30 minutes before vacuuming. In steps S3 and S4, the adhesive is poured at 60±5°C. This ensures optimal fluidity of the adhesive, guaranteeing good contact between the adhesive and the coil assembly during subsequent pouring.

[0019] Furthermore, the coil assembly includes several rectangular ring-shaped coils, each coil having a rectangular hole at its center; a first mounting boss corresponding to the rectangular hole of each coil is provided around the outside of the torque generator frame, and the coil assembly is fitted onto the first mounting boss. This facilitates the installation of the coil assembly.

[0020] Furthermore, a second mounting boss is provided between two adjacent first mounting bosses along the axial direction of the torque converter frame. The second mounting boss is located at the center of the two first mounting bosses, and after the coils are installed, the second mounting boss can abut against the two adjacent coils and limit their movement. By providing the second mounting boss, the gap between the coils is reduced, and both ends of the coils are in contact with a positioning boss for positioning, thus enabling the coils to be orthogonally lifted.

[0021] Furthermore, the rectangular ring structure has four coils.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] By setting a positioning boss, the centerline of which coincides with the centerline of the mold body, the torque converter frame can be inverted and its upper end inserted into the glue-pouring mold. The boss then limits the position of the torque converter frame, resulting in a simple structure and convenient installation. An outward-sloping guide platform is formed at the upper end of the mold body. This allows the glue to flow downwards through the guide platform, facilitating the expulsion of gas at the bottom of the channel. This reduces the likelihood of cracking between the glue and the torque converter frame, improving the yield rate of the finished product. Attached Figure Description

[0024] Figure 1 A schematic diagram of applying adhesive to an existing torque converter.

[0025] Figure 2This is a schematic diagram of the glue-pouring mold for a torque converter retaining ring assembly according to the present invention.

[0026] Figure 3 This is a schematic diagram of the torque frame of a torque converter fixing assembly according to the present invention.

[0027] In the picture:

[0028] 1a of the film base, 2a of the outer ring of the film, 3a of the torque device frame, 4a of the locking nut, 5a of the coil, 6a of the fixing block, and 7a of the locking screw.

[0029] Mold body 1, positioning boss 11, flow guide 12, torque generator frame 2, first mounting boss 21, second mounting boss 22, coil 3. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Example:

[0032] See Figure 2 and 3 A potting mold for a torque converter retaining ring assembly includes a mold body 1, which is a cylindrical structure closed at the lower end. A positioning boss 11 is formed at the bottom of the mold body 1, and the axis of the positioning boss 11 coincides with the axis of the mold body 1. The upper end of the mold body 1 slopes outward and extends to form a guide platform 12. In a specific implementation, the diameter of the positioning boss 11 is consistent with the inner diameter of the torque converter frame 2, thus ensuring more accurate positioning of the positioning boss 11. A pressure plate is also included, which is connected to the bottom of the mold body 1 by a locking bolt. The torque converter frame 2 in the torque converter retaining ring assembly has a flange. During processing, the diameter of the pressure plate is greater than the inner diameter of the flange and less than or equal to the outer diameter of the flange, so that the pressure plate can press against the flange of the torque converter frame 2 without obstructing potting. The pressure plate has a through hole in the middle, and a locking screw hole is provided in the middle of the positioning boss 11. The locking screw hole extends through the bottom of the mold body 1 along the axis of the mold body 1. The locking bolt passes through the through hole and connects with the screw hole. The pressure plate fixes the position of the torque generator frame 2, facilitating the glue pouring operation.

[0033] When using it, the specific steps are as follows:

[0034] S1. Install the coil 3 assembly onto the torque converter frame 2. Then, invert the torque converter frame 2 with the coil 3 installed and insert it into the potting mold. The positioning boss 11 provides a limiting position, creating a potting channel between the torque converter frame 2, the coil 3 assembly, and the potting mold. Specifically, the coil 3 assembly includes several rectangular ring-shaped coils 3, each with a rectangular hole at its center. A first mounting boss 21, corresponding to the rectangular hole of each coil 3, is provided around the outside of the torque converter frame 2. The coil 3 assembly is fitted onto the first mounting boss 21. This facilitates the installation of the coil 3 assembly. Between two adjacent first mounting bosses 21, a second mounting boss 22 is provided along the axial direction of the torque converter frame 2. The second mounting boss 22 is located at the center of the two first mounting bosses 21, and after the coil 3 is installed, the second mounting boss 22 can abut against the two adjacent coils 3 and limit their movement. By setting the second mounting boss 22, the gap between the coils 3 becomes smaller, and both ends of the coil 3 are in contact with a positioning boss 11 for positioning, so that the coil 3 is orthogonally lifted.

[0035] S2. Prepare the adhesive solution and evacuate it. Before evacuating, heat the adhesive solution to 60°C and maintain this temperature for 30 minutes. This optimizes the adhesive's fluidity, ensuring good contact between the adhesive and the coil assembly during subsequent pouring.

[0036] S3. Keep the adhesive solution at 60±5℃ for potting. Inject the vacuum-evacuated adhesive solution into the potting channel so that the adhesive solution submerges the coil 3. Then, place the torque converter coil assembly and the potting mold into a vacuum environment and evacuate at a rate of 0.5~1 L / s for 30s. This will remove the gas from the adhesive solution. If the time is extended, the injected adhesive solution will begin to solidify and the purpose of evacuation will not be achieved.

[0037] S4. Remove the torque converter coil assembly and the potting mold from the vacuum environment, and inject the adhesive into the potting channel again to fill the entire potting channel. In order to ensure that the fluidity of the adhesive reaches the best state and to ensure good contact between the adhesive and the coil assembly during subsequent potting, keep the adhesive at 60±5℃ for potting.

[0038] S5. After the glued structure is shaped, dried, demolded, and precision machined, the torque converter retaining ring assembly is obtained.

[0039] During the glue-pouring process, the glue is first evacuated, then the evacuated glue is poured in until it submerges the coil. Next, the torque converter stator assembly and the glue-pouring mold are evacuated again. This double evacuation process removes gas from the glue, ensuring no air bubbles in the glue layer. The glue adheres tightly to the torque converter frame and coil, resulting in high glue layer stability and improved yield of the torque converter stator assembly. The use of this glue-pouring mold for the torque converter stator assembly also reduces the likelihood of cracking between the glue and the torque converter frame, improving the finished product yield. Furthermore, it offers advantages such as convenient glue pouring, simple tooling, and easy demolding.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of the present invention without departing from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A potting method for a torque converter stator assembly, characterized in that, A dispensing mold is used, comprising a mold body, which is a cylindrical structure closed at the bottom. A positioning boss is formed at the bottom of the mold body, and the axis of the positioning boss coincides with the axis of the mold body. The upper end of the mold body slopes outward and extends to form a guide platform. The diameter of the positioning boss is consistent with the inner diameter of the torque converter frame. A pressure plate is also included, which is connected to the bottom of the mold body by a locking bolt. The pressure plate has a through hole in its center, and a locking screw hole is formed in the center of the positioning boss, extending along the axis of the mold body through the bottom of the mold body. The locking bolt passes through the through hole and connects to the screw hole. The specific steps include: S1. Install the coil assembly onto the torque converter frame, then invert the torque converter frame with the coil installed and insert it into the potting mold. A positioning boss is used to limit the movement, forming a potting channel between the torque converter frame, the coil assembly, and the potting mold. The coil assembly includes several rectangular ring-shaped coils, each with a rectangular hole at its center. A first mounting boss, corresponding to the rectangular hole of each coil, is provided around the outside of the torque converter frame. The coil assembly is fitted onto the first mounting boss. Between two adjacent first mounting bosses, a second mounting boss is provided along the axial direction of the torque converter frame. The second mounting boss is located at the center of the two first mounting bosses, and after the coil is installed, the second mounting boss can abut against and limit the movement of the two adjacent coils. S2. Prepare the adhesive solution and vacuum the adhesive solution; before vacuuming the adhesive solution, heat the adhesive solution to 60℃ and keep it at that temperature for 30 minutes. S3. Keep the adhesive solution at 60±5℃ for potting. Inject the vacuum-treated adhesive solution into the potting channel so that the adhesive solution submerges the coil. Then, place the potted torque coil assembly and potting mold into a vacuum environment and evacuate at a rate of 0.5~1 L / s for 30s. S4. Remove the torque converter retaining ring assembly and the potting mold from the vacuum environment, and inject adhesive into the potting channel again to fill the entire potting channel. S5. After the glued structure is shaped, dried, demolded, and precision machined, the torque converter retaining ring assembly is obtained.

2. The potting method for the torque converter retaining ring assembly according to claim 1, characterized in that, The rectangular ring structure has four coils.

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