Stator and casing thermocompression bonding equipment

Abstract

The invention discloses a stator and casing thermocompression bonding device, which comprises a pressing component, a casing heating component and a core rod ejection component, and is characterized in that the casing heating component and the core rod ejection component are respectively arranged around the pressing component, and the pressing component comprises a pressing workbench, a stator mounting component, a casing mounting component and a pressing cylinder component; the machine shell installation assembly is located above the stator installation assembly and movably installed on the press-fit workbench in the vertical direction. The machine shell heating assembly comprises a heating assembly installation platform, a heating assembly body and a heating spiral pipe, and the heating spiral pipe is fixedly installed on the side, close to the pressing assembly, of the heating assembly body. And the heating assembly main body is movably mounted on the heating assembly mounting platform. The device has the beneficial effects that in the whole heating and pressing process, the stator is kept static, the machine shell is kept to move up and down in the vertical direction, the coaxiality of the initial state is kept, then pressing can be rapidly carried out after heating is completed, and the pressing quality and efficiency are ensured.

Description

Technical Field

[0001] This invention relates to a motor manufacturing setup, and more particularly to a stator and housing hot-pressing device, belonging to the field of precision assembly technology. Background Technology

[0002] The stator is the stationary part of the motor, consisting of an iron core, windings, and internal support structures. It is responsible for generating the rotating magnetic field and supporting the rotor. The housing is the external casing of the motor, primarily serving a protective and mounting function. To ensure a stable output torque from the motor, a reliable connection between the housing and the stator is essential.

[0003] The most common way to connect the motor stator to the housing is by interference fit. Interference fit usually improves the reliability of the connection by increasing the minimum interference between the iron core and the housing, but factors such as the temperature difference between the two and the coefficient of material expansion need to be considered.

[0004] The stator and housing are often joined by thermal expansion and contraction through hot pressing. The housing is heated first, and then the stator is pressed into the heated housing. This makes the stator assembly more convenient and secure. Therefore, after the housing is heated, it needs to be quickly sent into the pressing area to press with the stator to avoid difficulty in pressing in the stator due to the cooling of the housing. The above steps not only require the heating area and the pressing area of ​​the housing to be close to each other, but also require quick and precise operation. If it is done manually, it will not only easily lead to low quality and efficiency of stator production, but also easily lead to safety hazards.

[0005] Chinese patent CN216851677U discloses a stator aluminum shell hot pressing equipment pressing assembly, including an aluminum shell heating section and a pressing section, which are disposed on the same fixed platform, making the heating area and pressing area of ​​the aluminum shell in the stator aluminum shell hot pressing equipment close to each other, which facilitates the pressing of the iron core and the aluminum shell; it also includes a limiting component and a housing positioning part, the limiting component is disposed below the pressing section, and the housing positioning part is disposed below the aluminum shell heating section and the pressing section; there is an intersecting area between the limiting component and the housing positioning part, and the intersecting area corresponds to the pressing section; it includes a conveying mechanism, which includes an aluminum shell conveying mechanism and an iron core conveying mechanism; the aluminum shell conveying mechanism corresponds to the housing positioning part, and the iron core conveying mechanism corresponds to the limiting component.

[0006] This technical solution requires heating the stator aluminum shell in the heating zone and then transporting it to the pressing zone for pressing. It also requires a core transport mechanism to transport the core to the pressing zone for pressing. The relative positions of the stator aluminum shell and the stator change multiple times throughout the process. Finally, during pressing, it is crucial to ensure that the stator aluminum shell and the stator are coaxial to successfully complete the pressing. This places high demands on positioning accuracy and equipment precision during transport. Furthermore, the multi-station transfer causes the temperature of the stator aluminum shell during pressing to be lower than the temperature after heating, making it more susceptible to ambient temperature fluctuations. Additionally, the stator is typically a hollow structure, requiring a core for fixation during pressing. However, after the stator and shell are assembled, the core needs to be removed. Due to the hot pressing process, it requires sufficient cooling and shaping before removal. The core is a reusable tooling that needs to be recycled. During removal, the core must be dropped vertically to separate from the stator, with the stator fixed inside the shell. Therefore, this technical solution suffers from the problem of needing to change stations before pressing and lacks a core removal step after pressing, resulting in an incomplete process. Summary of the Invention

[0007] Purpose of the invention: In order to solve the above-mentioned technical problems, the present invention provides a hot pressing device for stator and housing, which ensures that the housing and stator are in a coaxial position during the heating and pressing processes. After heating, pressing is performed directly, which improves the assembly quality and assembly efficiency. At the same time, after cooling, the iron core of the stator is removed to form a complete set of equipment that can realize the hot pressing process of stator and housing.

[0008] Technical solution: A stator and housing hot pressing device, comprising a pressing assembly, a housing heating assembly, and a mandrel ejection assembly, wherein the housing heating assembly and the mandrel ejection assembly are respectively arranged around the pressing assembly. The pressing assembly includes a pressing worktable, a stator mounting assembly, a housing mounting assembly, and a pressing cylinder assembly. The stator mounting assembly is fixedly mounted on the pressing worktable. The housing mounting assembly is located above the stator mounting assembly and is movably mounted on the pressing worktable in the vertical direction. The pressing cylinder assembly is located above the housing mounting assembly and is fixedly mounted on the pressing worktable. The housing heating assembly includes a heating assembly mounting platform, a heating assembly body, and a heating spiral tube. The heating spiral tube is fixedly installed on the side of the heating assembly body near the pressing assembly. The heating assembly body is movably installed on the heating assembly mounting platform, moving towards and away from the pressing assembly. The movement of the heating assembly body toward the pressing assembly causes the heating spiral tube to move above the housing mounting assembly.

[0009] The present invention provides a housing heating component and a mandrel ejection component in adjacent positions around the pressing component, which can provide a processing equipment that meets the complete stator and housing assembly process while ensuring pressing quality and efficiency.

[0010] In the initial state, the stator with the mandrel is fixedly installed on the stator mounting assembly, and the housing is fixedly installed on the housing mounting assembly. The coaxiality of the housing and the stator is ensured by the relative position of the stator mounting assembly and the housing mounting assembly and the positioning mechanism.

[0011] During the heating process, the main body of the heating component first moves towards the pressing component, causing the heating spiral tube to move above the housing mounting component; then the housing mounting component lifts the housing and moves it vertically upward to the inside of the heating spiral tube, where the heating spiral tube heats the housing. After heating is completed, the heating spiral tube is removed. During the pressing process, after the housing is heated, the pressing cylinder assembly pushes the housing downwards along with the housing mounting assembly, and inserts the stator with the mandrel into the housing.

[0012] Throughout the heating and pressing process, the stator remains stationary while the housing moves vertically up and down to maintain coaxiality in the initial state. This allows for rapid pressing after heating is complete, ensuring pressing quality and efficiency.

[0013] In a preferred embodiment, to facilitate the positioning of the stator with the mandrel, the stator mounting assembly includes a stator mounting assembly base plate and a stator positioning fixture. The stator mounting assembly base plate is fixedly mounted on the pressing worktable, and the stator positioning fixture is fixedly mounted on the stator mounting assembly base plate. The stator positioning fixture has a positioning groove that matches the mandrel. By fixing the stator mounting assembly base plate and the stator positioning fixture to the pressing worktable, the installation position of the stator with the mandrel can be determined. The positioning groove allows for more precise determination of the stator's position and prevents stator displacement during operation, thereby ensuring the smooth progress and quality of the pressing process.

[0014] In a preferred embodiment, to improve automation and simultaneously detect whether the stator is properly installed, the stator mounting assembly includes stator sensors located on both sides of the stator positioning fixture. The stator sensors consist of two sets of photoelectric sensors, upper and lower. When the stator is properly installed, both sets of photoelectric sensors are triggered simultaneously, thus determining that the stator is installed correctly. At the same time, the housing heating assembly is activated, and the heating spiral tube moves above the housing mounting assembly. The stator sensors can function as the equipment's start switch. Using two sets of photoelectric sensors also avoids accidental triggering. During operation, the housing is installed first, and then the stator installation is completed to trigger the equipment's start, completing the heating and pressing processes.

[0015] In a preferred embodiment, to ensure the coaxiality of the housing and the stator, and to ensure that the housing can move up and down in the vertical direction, the housing mounting assembly includes a housing positioning mounting plate, a housing positioning plate, a housing mounting guide post, a housing guide post mounting plate, and a housing mounting plate reset cylinder. The housing positioning plate is installed through the center of the housing positioning mounting plate. When the installation is completed, the center of the housing positioning plate is coaxial with the center of the stator positioning fixture. The two ends of the housing mounting guide post are respectively connected to the stator mounting assembly base plate and the housing guide post mounting plate. The housing positioning plate is located between the stator mounting assembly base plate and the housing guide post mounting plate. The housing positioning plate is fitted onto the housing mounting guide post and slides up and down along the housing mounting guide post. The housing mounting plate reset cylinder is fixedly installed at the bottom of the pressing worktable. The push rod of the housing mounting plate reset cylinder passes through the pressing worktable and the stator mounting assembly base plate in sequence and contacts the bottom of the housing positioning mounting plate.

[0016] When the housing needs to be heated or when the housing positioning and mounting plate is reset after the pressing process is completed, the housing mounting plate reset cylinder pushes the housing positioning and mounting plate to slide upward along the housing mounting guide post; after heating is completed, the pressing cylinder assembly pushes the housing together with the housing positioning and mounting plate downward along the housing mounting guide post, and inserts the stator with the mandrel into the housing.

[0017] In a preferred embodiment, to ensure accurate positioning of the housing and facilitate product removal after pressing, the housing positioning plate includes a support plate and a limiting plate. The support plate is fixedly installed at the bottom of the housing positioning mounting plate, and the limiting plate is fixedly installed above the housing positioning mounting plate. The support plate has a stator through hole at its center, and the limiting plate has a limiting hole at its center that matches the housing shape. The through hole and the limiting hole are coaxial, and the limiting hole is larger than the through hole. During pressing, the stator passes through the through hole and is inserted into the housing; the end of the housing at the inlet side passes through the limiting hole and rests on the upper surface of the support plate, and the outer wall of the housing contacts the inner wall of the limiting hole to form a positioning.

[0018] In a preferred embodiment, to achieve a more compact structure, reduce the displacement of the housing during the heating and pressing processes, and improve production efficiency, the housing guide post mounting plate has a U-shaped structure with a notch in the middle to accommodate the heating spiral tube. This notch in the housing guide post mounting plate allows for the heating spiral tube to be placed closer to the housing, minimizing the height difference between the heating spiral tube and the housing, thereby reducing the displacement of the housing during the heating and pressing processes.

[0019] In a preferred embodiment, to achieve initial fixation and shaping after pressing, a primary air-cooling component is provided on the pressing worktable. This primary air-cooling component is located on one side of the stator mounting component, with its air outlet facing the stator mounting position. After the pressing process is completed, the primary air-cooling component is activated to initially cool the high-temperature housing 4. Due to the thermal expansion and contraction of the housing, a tight contact is achieved between the inner diameter of the housing and the outer diameter of the stator, thus completing the initial fixation and shaping of the housing and stator. At the same time, the reduced temperature facilitates handling in the next process and will not affect the assembly quality.

[0020] Preferred option. In order to complete the removal and recycling of the mandrel while ensuring the pressing quality and form a complete thermal pressing process for the stator and the housing, the mandrel ejection assembly includes a conveying assembly, an air-cooling assembly, and a mandrel recycling assembly. The air-cooling assembly is a box structure with a fan. The conveying assembly passes through the air-cooling assembly. The mandrel recycling assembly is located in the middle of the conveying assembly and within the air-cooling area of the air-cooling assembly; The conveying assembly includes a front horizontal conveying component, a left longitudinal conveying component, a rear horizontal conveying component, and a right longitudinal conveying component to form a "冂"-shaped workpiece conveying route. The air-cooling assembly covers the area through which the workpiece passes from the inlet of the left longitudinal conveying component to the outlet of the right longitudinal conveying component; A finished product transfer tooling that rotates between the conveying components is provided on the conveying assembly. The workpiece after pressing is fixedly installed on the finished product transfer tooling; The mandrel recycling assembly is located above the right longitudinal conveying component.

[0021] By using the air-cooling assembly to cool the pressed housing again, the interference fit can be further increased. Since the mandrel is provided inside the inner diameter of the stator, it can ensure that the inner diameter of the stator remains unchanged during the shrinkage of the inner diameter of the housing, providing an accurate inner diameter size for the subsequent installation of the rotor. By increasing the length of the workpiece conveying route, the cooling effect is improved, and the mandrel recycling assembly is arranged at the end of the cooling route, enabling the mandrel to be removed after the inner diameter size of the housing is stable, reducing the influence of the shrinkage of the cooled inner diameter of the housing on the stator.

[0022] The entire process of mandrel removal is as follows: First, transfer the housing with the mandrel and the stator semi-finished workpiece after pressing and preliminary temperature reduction and fixing from the pressing component to the finished product transfer tooling of the mandrel ejection assembly; Then, the front horizontal conveying component conveys the finished product transfer tooling together with the semi-finished workpiece to the left longitudinal conveying component; Secondly, the finished product transfer tooling together with the semi-finished workpiece rotates successively between the left longitudinal conveying component, the rear horizontal conveying component, and the right longitudinal conveying component. During the rotation process, the air-cooling assembly performs air-cooling and temperature reduction treatment on the semi-finished workpiece; Finally, when the semi-finished workpiece rotates to the mandrel recycling assembly, the mandrel recycling assembly ejects the mandrel from the semi-finished workpiece to form the final finished product workpiece, and then returns to the finished product transfer tooling from the outlet of the right longitudinal conveying component. The finished product transfer tooling transports it back to the starting position, and the operator removes the finished product workpiece and replaces it with the semi-finished workpiece, and so on in a cycle.

[0023] In order to realize the conveying of semi-finished workpieces and the recycling of finished workpieces, the front transverse conveying assembly includes a drive motor, a drive screw, a movable slide rail and a movable slide table. The movable slide table is slidably mounted on the movable slide rail. The drive motor is drivenly connected to the drive screw, and the movable slide table is drivenly connected to the drive screw. A position sensor is provided on one side of the movable slide rail. The triggering mechanism of the position sensor is installed on the movable slide table and is located on one side of the position sensor, matching the position of the position sensor.

[0024] The finished product transfer fixture is inserted into the moving slide from the side facing the left longitudinal conveying component inlet and can slide longitudinally. After the finished product transfer fixture is installed in place, the semi-finished workpiece is loaded onto the top of the finished product transfer fixture.

[0025] Start the drive motor, drive the screw to rotate and drive the moving slide table to slide along the moving slide rail to the left longitudinal conveyor component inlet.

[0026] The cylinders on the outside of the front transverse conveyor push the finished product transfer fixture, along with the semi-finished workpieces, into the left longitudinal conveyor. The finished product transfer fixtures, each containing a semi-finished workpiece, are arranged sequentially within the track of the left longitudinal conveyor. Each time one is pushed in, the foremost fixture is moved forward one distance until it enters the rear transverse conveyor. The rear transverse conveyor then transports the finished product transfer fixtures containing semi-finished workpieces to the right longitudinal conveyor. The right longitudinal conveyor then delivers these fixtures to the mandrel recovery station of the mandrel recovery assembly. After the mandrel is recovered, the finished product transfer fixtures containing the finished workpieces continue to be pushed forward until they reach the exit of the right longitudinal conveyor. Finally, the finished product transfer fixtures containing the finished workpieces continue forward from the exit of the right longitudinal conveyor and enter the waiting moving slide.

[0027] After the moving slide completes the transport of the semi-finished workpiece at the inlet of the left longitudinal conveyor component, there is a time difference between the entry of the finished product transfer fixture at the front end of the left longitudinal conveyor component and the subsequent transport of the transverse conveyor component to the right longitudinal conveyor component. During this time difference, the moving slide moves from the inlet of the left longitudinal conveyor component to the outlet of the right longitudinal conveyor component. When the finished product transfer fixture containing the finished workpiece enters the moving slide, it directly returns to the starting position of the front transverse conveyor component, completing a single mandrel recycling cycle.

[0028] Three position sensors are provided on one side of the movable slide rail, located at the starting position, the inlet of the left longitudinal conveying component, and the outlet of the right longitudinal conveying component, respectively. When the movable slide moves to the corresponding position, the position sensor is triggered, and the drive motor stops working.

[0029] The entire mandrel ejection assembly operation only requires the operator to change the semi-finished and finished workpieces at the initial position. The operation is simple and labor-saving, and can also be combined with automated operation equipment.

[0030] In a preferred embodiment, to achieve the removal and recycling of the mandrel, the mandrel recycling assembly includes a mandrel ejection cylinder, a housing block, a mandrel ejector pin, a mandrel ejection fixing fixture, a mandrel chute, a discharge plate, and a waste box. The mandrel ejection fixing fixture is located on the conveying track of the right-side longitudinal conveying assembly. The finished product transfer fixture passes through the mandrel ejection fixing fixture and completes the mandrel ejection. The mandrel ejection cylinder, together with the housing block and the mandrel ejector pin, is installed above the mandrel ejection fixing fixture. The mandrel ejection fixing fixture has a through hole at its center, which is coaxial with the mandrel ejector pin. The housing block and the mandrel ejector pin are respectively connected to the ejection part of the mandrel ejection cylinder. The mandrel ejector pin passes through the center of the housing block and can continue to extend downward through the housing block. The mandrel chute, the discharge plate, and the waste box are respectively fixedly installed at the bottom of the mandrel ejection fixing fixture. The mandrel chute communicates with the through hole at the center of the mandrel ejection fixing fixture, and the discharge plate connects the mandrel chute and the waste box. The finished product transfer fixture includes a transfer fixture base plate, a housing outer diameter fixing part, a stator positioning protrusion ring, and a mandrel through hole; the housing outer diameter fixing part is fixedly installed on the transfer fixture base plate, and the inner diameter of the housing outer diameter fixing part matches the outer diameter of the housing; the stator positioning protrusion ring protrudes upward with an outer diameter smaller than the inner diameter of the housing, and an inner diameter larger than the outer diameter of the mandrel; the mandrel through hole penetrates the transfer fixture base plate and the stator positioning protrusion ring, and its diameter is equal to that of the stator positioning protrusion ring.

[0031] Beneficial effects: Throughout the heating and pressing process of this invention, the stator remains stationary while the housing moves vertically up and down, maintaining the coaxiality of the initial state. This allows for rapid pressing after heating is completed, ensuring pressing quality and efficiency. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall layout structure of the present invention; Figure 2 This is a schematic diagram of the initial state structure of the pressing assembly of the present invention; Figure 3 This is a schematic diagram of the heating state structure of the pressing assembly of the present invention; Figure 4 This is a schematic diagram of the pressing state structure of the pressing assembly of the present invention; Figure 5 This is an exploded view of the stator, mandrel, and housing of the present invention; Figure 6 This is a schematic diagram of the structure of the stator of the present invention installed inside the housing with the core rod removed; Figure 7 This is a schematic diagram of the assembly structure of the stator mounting assembly of the present invention; Figure 8 This is a schematic diagram of the structure of the housing mounting assembly of the present invention; Figure 9 This is a schematic diagram of the mandrel ejection assembly of the present invention; Figure 10 This is a schematic diagram of the conveying assembly of the present invention; Figure 11 This is a schematic diagram of the structure of the movable slide of the present invention; Figure 12 This is a schematic diagram of the finished product transfer tooling of the present invention; Figure 13 This is a schematic diagram of the initial state structure of the front transverse conveying component of the present invention; Figure 14 This is a schematic diagram showing the finished product of the present invention entering the air-cooled assembly position; Figure 15 This is a schematic diagram showing the finished product discharge position of the present invention; Figure 16 This is a schematic diagram of the initial state of the mandrel ejection assembly of the present invention; Figure 17 This is a schematic diagram showing the state of the mandrel ejection assembly of the present invention after ejection; Figure 18 This is a schematic diagram of the mandrel ejection mechanism of the present invention; Figure 19 This is a schematic diagram of the core rod ejection and fixing recovery mechanism of the present invention. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] like Figure 1-6 As shown, a stator and housing hot pressing device includes a pressing assembly 1, a housing heating assembly 2, and a mandrel ejection assembly 3, wherein the housing heating assembly 2 and the mandrel ejection assembly 3 are respectively arranged around the pressing assembly 1. The pressing assembly 1 includes a pressing worktable 11, a stator mounting assembly 12, a housing mounting assembly 13, and a pressing cylinder assembly 14. The stator mounting assembly 12 is fixedly mounted on the pressing worktable 11. The housing mounting assembly 13 is located above the stator mounting assembly 12 and is movably mounted on the pressing worktable 11 in the vertical direction. The pressing cylinder assembly 14 is located above the housing mounting assembly 13 and is fixedly mounted on the pressing worktable 11. The housing heating assembly 2 includes a heating assembly mounting platform 21, a heating assembly body 22, and a heating spiral tube 23. The heating spiral tube 23 is fixedly installed on the side of the heating assembly body 22 near the pressing assembly 1. The heating assembly body 22 is movably installed on the heating assembly mounting platform 21, and the moving direction is towards and away from the pressing assembly 1. When the heating assembly body 22 moves towards the pressing assembly 1, it drives the heating spiral tube 23 to move above the housing mounting assembly 13.

[0035] The present invention provides a processing equipment that meets the complete stator and housing assembly process by setting the housing heating assembly 2 and the mandrel ejection assembly 3 in adjacent positions around the pressing assembly 1, which can ensure the pressing quality and efficiency.

[0036] In the initial state, the stator 5 with the mandrel 6 is fixedly installed on the stator mounting assembly 12, and the housing 4 is fixedly installed on the housing mounting assembly 13. The coaxiality of the housing 4 and the stator 5 is ensured by the relative position of the stator mounting assembly 12 and the housing mounting assembly 13 and the positioning mechanism.

[0037] During the heating process, the main body 22 of the heating component moves towards the pressing component 1, which drives the heating spiral tube 23 to move above the housing mounting component 13; then the housing mounting component 13 lifts the housing 4 and moves it upward in the vertical direction to the inside of the heating spiral tube 23, and the heating spiral tube 23 heats the housing 4. After the heating is completed, the heating spiral tube 23 is removed. During the pressing process, after the heating of the housing 4 is completed, the pressing cylinder assembly 14 pushes the housing 4 downward together with the housing mounting assembly 13 to move downward, and the stator 5 with the mandrel 6 is installed into the housing 4.

[0038] Throughout the heating and pressing process, the stator 5 remains stationary while the housing 4 moves vertically up and down to maintain the coaxiality of the initial state. This allows for rapid pressing after heating is completed, ensuring pressing quality and efficiency.

[0039] like Figure 5 and 7 As shown, to facilitate the positioning of the stator 5 with the mandrel 6, the stator mounting assembly 12 includes a stator mounting assembly base plate 121 and a stator positioning fixture 122. The stator mounting assembly base plate 121 is fixedly mounted on the pressing worktable 11, and the stator positioning fixture 122 is fixedly mounted on the stator mounting assembly base plate 121. The stator positioning fixture 122 is provided with a positioning groove that matches the mandrel 6. By fixing the stator mounting assembly base plate 121 and the stator positioning fixture 122 on the pressing worktable 11, the installation position of the stator 5 with the mandrel 6 can be determined. The positioning groove allows for more precise determination of the stator 5's position and prevents displacement of the stator 5 during operation, thereby ensuring the smooth progress and quality of the pressing process.

[0040] like Figure 7 As shown, to improve automation and simultaneously detect whether the stator 5 is installed correctly, the stator mounting assembly 12 includes a stator sensor 123, which is located on both sides of the stator positioning fixture 122. The stator sensor 123 consists of two sets of photoelectric sensors, upper and lower. When the stator 5 is installed correctly, both sets of photoelectric sensors are triggered simultaneously, thus determining that the stator 5 is installed correctly. At the same time, the housing heating assembly 2 is activated, and the heating spiral tube 23 moves above the housing mounting assembly 13. The stator sensor 123 can act as the equipment's start switch. Using two sets of photoelectric sensors also avoids accidental triggering. During operation, the housing 4 is installed first, and then the stator 5 is installed last to trigger the equipment's start, completing the heating and pressing processes.

[0041] To achieve initial fixation and shaping after pressing, a primary air-cooling component 15 is installed on the pressing worktable 11. The primary air-cooling component 15 is located on one side of the stator mounting component 12, with its air outlet facing the mounting position of the stator 5. After the pressing process is completed, the primary air-cooling component 15 is activated to initially cool down the high-temperature housing 4. Due to the thermal expansion and contraction of the housing 4, a tight contact is achieved between the inner diameter of the housing 4 and the outer diameter of the stator 5, thus completing the initial fixation and shaping of the housing 4 and the stator 5. At the same time, the reduced temperature facilitates handling in the next process and will not affect the assembly quality.

[0042] like Figure 7 and 8 As shown, in order to ensure the coaxiality of the housing and the stator, and to ensure that the housing can move up and down in the vertical direction, the housing mounting assembly 13 includes a housing positioning mounting plate 131, a housing positioning plate 132, a housing mounting guide post 133, a housing guide post mounting plate 134, and a housing mounting plate reset cylinder 135. The housing positioning plate 132 is installed through the center of the housing positioning mounting plate 131. When the installation is completed, the center of the housing positioning plate 132 is coaxial with the center of the stator positioning fixture 122. The two ends of the housing mounting guide post 133 are respectively connected to the stator mounting assembly base plate 121 and the housing guide post mounting plate 134. The housing positioning plate 132 is located between the stator mounting assembly base plate 121 and the housing guide post mounting plate 134. The housing positioning plate 132 is fitted onto the housing mounting guide post 133 and slides up and down along the housing mounting guide post 133. The housing mounting plate reset cylinder 135 is fixedly installed at the bottom of the pressing worktable 11. The push rod of the housing mounting plate reset cylinder 135 passes through the pressing worktable 11 and the stator mounting assembly base plate 121 in sequence and contacts the bottom of the housing positioning mounting plate 131.

[0043] When the housing 4 needs to be heated or when the housing positioning and mounting plate 131 is reset after the pressing process, the housing mounting plate reset cylinder 135 pushes the housing positioning and mounting plate 131 to slide upward along the housing mounting guide column 133; after the heating is completed, the pressing cylinder assembly 14 pushes the housing 4 and the housing positioning and mounting plate 131 downward along the housing mounting guide column 133 together, and the stator 5 with the mandrel 6 is sleeved into the housing 4.

[0044] As Figure 8 shown, in order to ensure the accurate positioning of the housing 4 and facilitate the removal of the product after pressing, the housing positioning plate 132 includes a support plate 136 and a limit plate 137. The support plate 136 is fixedly installed at the bottom of the housing positioning and mounting plate 131, and the limit plate 137 is fixedly installed above the housing positioning and mounting plate 131. A through hole for the stator 5 is provided in the center of the support plate 136, and a limit hole matching the outer shape of the housing 4 is provided in the center of the limit plate 137. The through hole and the limit hole are coaxial, and the limit hole is larger than the through hole. When pressing, the stator 5 passes through the through hole and is stuffed into the interior of the housing 4; the end of one side of the inlet of the housing 4 passes through the limit hole and falls on the upper surface of the support plate 136, and the outer wall of the housing 4 contacts the inner wall of the limit hole to form positioning.

[0045] In order to make the structure more compact, reduce the displacement of the housing 4 in the heating process and the pressing process, and improve production efficiency, the housing guide column mounting plate 134 is in a "concave" shape structure, and a notch for accommodating the heating spiral tube 23 is provided in the middle. The notch of the housing guide column mounting plate 134 can accommodate the heating spiral tube 23, so that the height difference between the heating spiral tube 23 and the housing 4 can be minimized, thereby reducing the displacement of the housing 4 in the heating process and the pressing process.

[0046] As Figure 9 、 10 and shown in FIG. 12, in order to complete the removal and recycling of the mandrel on the premise of ensuring the pressing quality and form a complete thermal pressing process of the stator 5 and the housing 4, the mandrel ejection assembly 3 includes a conveying assembly 31, an air-cooling assembly 32 and a mandrel recycling assembly 33. The air-cooling assembly 32 is a box structure with a fan. The conveying assembly 31 passes through the air-cooling assembly 32. The mandrel recycling assembly 33 is located in the middle of the conveying assembly 31 and is in the air-cooling area of the air-cooling assembly 32; The conveying assembly 31 includes a front transverse conveying component 311, a left longitudinal conveying component 312, a rear transverse conveying component 313 and a right longitudinal conveying component 314 to form a "冂" - shaped workpiece conveying route. The air-cooling assembly 32 covers the area where the workpiece passes from the inlet of the left longitudinal conveying component 312 to the outlet of the right longitudinal conveying component 314; The conveying assembly 31 is provided with a finished product transfer fixture 34 that flows between the various conveying components, and the pressed workpiece is fixedly installed on the finished product transfer fixture 34. The mandrel recovery assembly 33 is located above the right longitudinal conveying assembly 314.

[0047] The air-cooling assembly 32 further lowers the pressed housing 4, increasing the interference fit. Since the stator 5 has a mandrel 6 within its inner diameter, the inner diameter of the stator 5 remains constant during the housing 4's inner diameter contraction, providing a precise inner diameter dimension for subsequent rotor installation. Increasing the length of the workpiece conveying path improves cooling efficiency, and placing the mandrel recovery assembly 33 at the end of the cooling path allows the mandrel 6 to be removed only after the housing 4's inner diameter dimension has stabilized, reducing the impact of the housing 4's inner diameter contraction during cooling on the stator 5.

[0048] The entire process of removing the mandrel is as follows: First, the semi-finished workpieces, including the housing 4 and stator 5 with mandrel 6, which have been pre-cooled and fixed after pressing, are transferred from the pressing assembly 1 to the finished product transfer fixture 34 of the mandrel ejection assembly 3. Then, the front transverse conveyor assembly 311 conveys the finished product transfer fixture 34 along with the semi-finished workpiece to the left longitudinal conveyor assembly 312. Secondly, the finished product transfer fixture 34, together with the semi-finished workpiece, flows sequentially between the left longitudinal conveying component 312, the rear transverse conveying component 313 and the right longitudinal conveying component 314. During the flow, the air-cooling assembly 32 performs air-cooling cooling on the semi-finished workpiece. Finally, when the semi-finished workpiece is transferred to the mandrel recycling assembly 33, the mandrel recycling assembly 33 pushes the mandrel 6 out of the semi-finished workpiece to form the final finished workpiece, and then returns to the finished product transfer fixture 34 from the outlet of the right longitudinal conveying component 314. The finished product transfer fixture 34 transports it back to the starting position, and the operator removes the finished workpiece and replaces it with the semi-finished workpiece, and so on.

[0049] like Figure 10 , 13 As shown in Figures 14 and 15, in order to realize the conveying of semi-finished workpieces and the recycling of finished workpieces, the front transverse conveying assembly 311 includes a drive motor 3111, a drive screw 3112, a movable slide rail 3113 and a movable slide table 3114. The movable slide table 3114 is slidably mounted on the movable slide rail 3113. The drive motor 3111 is connected to the drive screw 3112 in a transmission connection, and the movable slide table 3114 is connected to the drive screw 3112 in a driving connection. A position sensor 3115 is provided on one side of the movable slide rail 3113. The triggering mechanism of the position sensor 3115 is installed on the movable slide table 3114 and is located on one side of the position sensor 3115, matching the position of the position sensor 3115.

[0050] The finished product transfer fixture 34 is inserted into the movable slide table 3114 from the side of the longitudinal conveying component 312 facing to the left, and can slide longitudinally. After the finished product transfer fixture 34 is installed in place, the semi-finished workpiece is loaded onto the top of the finished product transfer fixture 34.

[0051] Start the drive motor 3111, drive the screw 3112 to rotate and drive the movable slide table 3114 to slide along the movable slide rail 3113 to the inlet of the left longitudinal conveying component 312.

[0052] The cylinder on the outside of the front transverse conveyor assembly 311 pushes the finished product transfer fixture 34, along with the semi-finished workpiece, into the left longitudinal conveyor assembly 312. The finished product transfer fixtures 34, each containing a semi-finished workpiece, are arranged sequentially within the track of the left longitudinal conveyor assembly 312. Each time one is pushed in, the foremost fixture is moved forward one distance until it enters the rear transverse conveyor assembly 313. The rear transverse conveyor assembly 313 then transports the finished product transfer fixtures 34 containing semi-finished workpieces to the right longitudinal conveyor assembly 314. The right longitudinal conveyor assembly 314 then delivers the finished product transfer fixtures 34 containing semi-finished workpieces to the mandrel recovery station of the mandrel recovery assembly 33. After the mandrel 6 is recovered, the finished product transfer fixtures 34 containing finished workpieces continue to be pushed forward until they reach the outlet of the right longitudinal conveyor assembly 314. The finished product transfer fixtures 34 containing finished workpieces continue to move forward from the outlet of the right longitudinal conveyor assembly 314 into the waiting moving slide 3114.

[0053] After the movable slide 3114 completes the transport of the semi-finished workpiece at the inlet of the left longitudinal conveying component 312, there is a time difference between the finished product transfer fixture 34 at the front end of the left longitudinal conveying component 312 entering the rear transverse conveying component 313 and then transporting it to the right longitudinal conveying component 314. At this time, the movable slide 3114 uses this time difference to move from the inlet of the left longitudinal conveying component 312 to the outlet of the right longitudinal conveying component 314. When the finished product transfer fixture 34 containing the finished workpiece enters the movable slide 3114, it directly returns to the starting position of the front transverse conveying component 311, completing a single mandrel recycling cycle.

[0054] Three position sensors 3115 are provided on one side of the movable slide rail 3113, located at the starting position, the inlet of the left longitudinal conveying component 312, and the outlet of the right longitudinal conveying component 314, respectively. When the movable slide 3114 slides to the corresponding position, the position sensor 3115 is triggered, and the drive motor 3111 stops working.

[0055] The entire operation of the mandrel ejection assembly 3 only requires the operator to change the semi-finished workpiece and the finished workpiece at the initial position. The operation is simple and labor-saving, and it can also be combined with automated operation equipment.

[0056] like Figure 10 , 12 As shown in Figures 16-19, to achieve the removal and recycling of the mandrel 6, the mandrel recycling assembly 33 includes a mandrel ejection cylinder 331, a housing pressing block 332, a mandrel ejector pin 333, a mandrel ejection fixing fixture 334, a mandrel slide 335, a discharge plate 336, and a waste box 337. The mandrel ejection fixing fixture 334 is located on the conveying track of the right longitudinal conveying assembly 314. The finished product transfer fixture 34 passes through the mandrel ejection fixing fixture 334 and completes the mandrel ejection. The mandrel ejection cylinder 331, together with the housing pressing block 332 and the mandrel ejector pin 333, is installed on the mandrel ejection fixing fixture 334. The mandrel ejection fixing fixture 334 has a through hole at its center, which is coaxial with the mandrel ejector pin 333. The housing pressure block 332 and the mandrel ejector pin 333 are respectively connected to the ejection part of the mandrel ejection cylinder 331. The mandrel ejector pin 333 passes through the center of the housing pressure block 332 and can continue to extend downward through the housing pressure block 332. The mandrel slide 335, the discharge plate 336 and the waste box 337 are respectively fixedly installed at the bottom of the mandrel ejection fixing fixture 334. The mandrel slide 335 communicates with the through hole at the center of the mandrel ejection fixing fixture 334. The discharge plate 336 connects the mandrel slide 335 and the waste box 337. The finished product transfer fixture 34 includes a transfer fixture base plate 341, a housing outer diameter fixing part 342, a stator positioning protrusion ring 343, and a mandrel through hole 344. The housing outer diameter fixing part 342 is fixedly installed on the transfer fixture base plate 341, and the inner diameter of the housing outer diameter fixing part 342 matches the outer diameter of the housing 4. The stator positioning protrusion ring 343 protrudes upward with an outer diameter smaller than the inner diameter of the housing 4 and an inner diameter larger than the outer diameter of the mandrel 6. The mandrel through hole 344 penetrates the transfer fixture base plate 341 and the stator positioning protrusion ring 343, and its diameter is equal to that of the stator positioning protrusion ring 343.

[0057] On the mandrel ejection fixing fixture 334, the fixture sensor senses the position sensing column of the finished product transfer fixture 34. The positioning pin reset cylinder of the mandrel ejection fixing fixture 334 drives the positioning pin fixing seat mounting plate to move upward with the positioning pin, pass through the positioning pin sleeve of the support block and insert into the positioning pin sleeve of the finished product transfer fixture 34, thus completing the position fixing of the finished product transfer fixture 34.

[0058] On the mandrel recovery assembly 33, after the finished product sensor detects the finished product in the finished product transfer fixture 34, the mandrel ejection cylinder 331 drives the pressure head mounting plate and the housing pressure block mounting plate to move downwards until the housing pressure block 332 contacts the finished product's housing 4. Then, the housing pressure block mounting plate stops moving downwards and converts the downward force into pressure on the finished product's housing 4. The mandrel ejection cylinder 331 drives the mandrel ejector pin fixing seat to eject the mandrel 6 from the finished product through force transmission, with the help of the mandrel ejector pin 333. After the mandrel ejection cylinder 331 moves to the bottom, it returns to its original position. After the housing pressure block 332 separates from the finished product's housing, the housing pressure block reset cylinder drives the housing pressure block mounting plate back to its initial position.

[0059] After the mandrel 6 in the finished product is ejected by the mandrel recycling assembly 33 on the mandrel ejection fixing fixture 334, it falls along the mandrel slide 335 onto the buffer block, and then is pushed to the discharge plate 336 by the mandrel ejection cylinder with the mandrel ejection cylinder top block, and finally falls into the waste box 337 for recycling.

[0060] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stator and housing hot pressing device, comprising a pressing assembly (1), a housing heating assembly (2), and a mandrel ejection assembly (3), wherein the housing heating assembly (2) and the mandrel ejection assembly (3) are respectively arranged around the pressing assembly (1), characterized in that: The pressing assembly (1) includes a pressing worktable (11), a stator mounting assembly (12), a housing mounting assembly (13), and a pressing cylinder assembly (14). The stator mounting assembly (12) is fixedly mounted on the pressing worktable (11). The housing mounting assembly (13) is located above the stator mounting assembly (12) and is movably mounted on the pressing worktable (11) in the vertical direction. The pressing cylinder assembly (14) is located above the housing mounting assembly (13) and is fixedly mounted on the pressing worktable (11). The housing heating assembly (2) includes a heating assembly mounting platform (21), a heating assembly body (22), and a heating spiral tube (23). The heating spiral tube (23) is fixedly installed on the side of the heating assembly body (22) near the pressing assembly (1). The heating assembly body (22) is movably installed on the heating assembly mounting platform (21) in the direction of moving closer to and away from the pressing assembly (1). The heating assembly body (22) moves towards the pressing assembly (1), causing the heating spiral tube (23) to move above the housing mounting assembly (13).

2. The stator and housing hot pressing equipment according to claim 1, characterized in that: The stator mounting assembly (12) includes a stator mounting assembly base plate (121) and a stator positioning fixture (122). The stator mounting assembly base plate (121) is fixedly mounted on the pressing worktable (11), and the stator positioning fixture (122) is fixedly mounted on the stator mounting assembly base plate (121). The stator positioning fixture (122) is provided with a positioning groove that matches the mandrel (6).

3. The stator and housing hot pressing equipment according to claim 2, characterized in that: The stator mounting assembly (12) includes a stator sensor (123), which is located on both sides of the stator positioning fixture (122).

4. The stator and housing hot pressing equipment according to claim 2, characterized in that: The housing mounting assembly (13) includes a housing positioning mounting plate (131), a housing positioning plate (132), a housing mounting guide post (133), a housing guide post mounting plate (134), and a housing mounting plate reset cylinder (135). The housing positioning plate (132) is installed through the center of the housing positioning mounting plate (131). When the installation is completed, the center of the housing positioning plate (132) is coaxial with the center of the stator positioning fixture (122). The two ends of the housing mounting guide post (133) are respectively connected to the stator mounting assembly base plate (121) and the housing guide post mounting plate (134). The housing positioning plate (132) is located between the stator mounting assembly base plate (121) and the housing guide post mounting plate (134). The housing positioning plate (132) is fitted onto the housing mounting guide post (133) and slides up and down along the housing mounting guide post (133). The housing mounting plate reset cylinder (135) is fixedly installed at the bottom of the pressing workbench (11). The ejector rod of the housing mounting plate reset cylinder (135) sequentially penetrates through the pressing workbench (11) and the stator mounting component bottom plate (121) and contacts the bottom of the housing positioning mounting plate (131).

5. The stator and housing hot pressing equipment according to claim 4, characterized in that: The housing positioning plate (132) includes a support plate (136) and a limiting plate (137). The support plate (136) is fixedly installed at the bottom of the housing positioning mounting plate (131), and the limiting plate (137) is fixedly installed above the housing positioning mounting plate (131). A through hole for the stator (5) is provided in the center of the support plate (136), and a limiting hole matching the outer shape of the housing (4) is provided in the center of the limiting plate (137). The through hole and the limiting hole are coaxial, and the limiting hole is larger than the through hole.

6. The stator and housing hot pressing equipment according to claim 4, characterized in that: The housing guide post mounting plate (134) has a "concave" shape structure, and a notch for accommodating the heating spiral tube (23) is provided in the middle.

7. The stator and housing hot pressing equipment according to claim 1, characterized in that: A primary air cooling component (15) is provided on the pressing workbench (11). The primary air cooling component (15) is located on one side of the stator mounting component (12), and the air outlet faces the installation position of the stator (5).

8. The stator and housing hot pressing equipment according to claim 1, characterized in that: The mandrel ejecting component (3) includes a conveying assembly (31), an air cooling assembly (32), and a mandrel recycling assembly (33). The air cooling assembly (32) is a box structure with a fan. The conveying assembly (31) passes through the air cooling assembly (32). The mandrel recycling assembly (33) is located in the middle of the conveying assembly (31) and in the air cooling area of the air cooling assembly (32). The conveying assembly (31) includes a front horizontal conveying component (311), a left longitudinal conveying component (312), a rear horizontal conveying component (313), and a right longitudinal conveying component (314) to form a "冂"-shaped workpiece conveying route. The air cooling assembly (32) covers the area where the workpiece passes from the inlet of the left longitudinal conveying component (312) to the outlet of the right longitudinal conveying component (314). A finished product transfer tooling (34) for transferring between each conveying component is provided on the conveying assembly (31). The workpiece after pressing is fixedly installed on the finished product transfer tooling (34). The mandrel recycling assembly (33) is located above the right longitudinal conveying component (314).

9. The stator and housing hot pressing equipment according to claim 8, characterized in that: The front horizontal conveying component (311) includes a driving motor (3111), a driving screw rod (3112), a moving slide rail (3113), and a moving slide table (3114). The moving slide table (3114) is slidably installed on the moving slide rail (3113). The driving motor (3111) is in transmission connection with the driving screw rod (3112), and the moving slide table (3114) is in driving connection with the driving screw rod (3112). A position sensor (3115) is provided on one side of the moving slide rail ( 10. The stator and housing hot pressing equipment according to claim 8, characterized in that: The mandrel recycling assembly (33) includes a mandrel ejection cylinder (331), a housing pressing block (332), a mandrel ejector pin (333), a mandrel ejection fixing fixture (334), a mandrel chute (335), a discharge plate (336), and a waste box (337). The mandrel ejection fixing fixture (334) is located on the conveying track of the right longitudinal conveying assembly (314). The finished product transfer fixture (34) passes through the mandrel ejection fixing fixture (334) and completes the mandrel ejection. The mandrel ejection cylinder (331), together with the housing pressing block (332) and the mandrel ejector pin (333), is installed above the mandrel ejection fixing fixture (334). (334) has a through hole in the center, which is coaxial with the mandrel ejector pin (333). The housing pressure block (332) and the mandrel ejector pin (333) are respectively connected to the ejection part of the mandrel ejection cylinder (331). The mandrel ejector pin (333) passes through the center of the housing pressure block (332) and can continue to extend downward through the housing pressure block (332). The mandrel slide (335), the discharge plate (336) and the waste box (337) are respectively fixedly installed at the bottom of the mandrel ejection fixture (334). The mandrel slide (335) is connected to the through hole in the center of the mandrel ejection fixture (334). The discharge plate (336) connects the mandrel slide (335) and the waste box (337). The finished product transfer fixture (34) includes a transfer fixture base plate (341), a housing outer diameter fixing part (342), a stator positioning protrusion ring (343), and a mandrel through hole (344). The housing outer diameter fixing part (342) is fixedly installed on the transfer fixture base plate (341), and the inner diameter of the housing outer diameter fixing part (342) matches the outer diameter of the housing (4). The stator positioning protrusion ring (343) protrudes upward with an outer diameter smaller than the inner diameter of the housing (4) and an inner diameter larger than the outer diameter of the mandrel (6). The mandrel through hole (344) penetrates the transfer fixture base plate (341) and the stator positioning protrusion ring (343), and its diameter is equal to that of the stator positioning protrusion ring (343).

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