An assembling device and control method for an electric drive motor

Abstract

The application relates to the technical field of motor press-fitting, and provides a combined press-fitting device for an electric drive motor and a control method. The combined press-fitting device comprises an oil ring lubricating device installed on a rack and used for lubricating delivered oil rings and delivering the lubricated oil rings to corresponding positions below an oil ring mounting structure; the oil ring mounting structure is configured to grab the lubricated oil rings delivered by the oil ring lubricating device and press-fit the oil rings into corresponding motor housings at the bottom; a flat key conveying structure is used for conveying flat keys to the bottom of a flat key mounting structure; the flat key mounting structure is used for assembling the flat keys into key grooves of a stator; a stator conveying mechanism is slidably arranged on the rack and used for moving the stator with the flat keys to below a stator mounting structure; and the stator mounting structure is used for grabbing the stator assembled with the flat keys. Compared with the prior art, the application solves the technical problems of large equipment space occupation, high cost and low operation efficiency in the prior art.

Description

Technical Field

[0001] This application relates to the field of motor press-fitting technology, and in particular to a mounting device and control method for electric drive motors. Background Technology

[0002] With the development of electric vehicles, electric drive systems are moving towards high integration. The assembly method of the stator and housing needs to adapt to this trend, ensuring tight integration and efficient cooperation between the motor and other components (such as controllers and reducers). Interference fit has advantages such as simple structure, good centering, and the ability to withstand large axial forces and torques. In electric drive products, interference fit is often used for the assembly of the stator and housing. This fit ensures a tight connection between the stator and housing, improving the overall rigidity and impact resistance of the motor. The assembly method of the stator and housing affects the NVH (noise, vibration, and harshness) performance of the motor. In the interference fit scheme, the stator mates with the housing through the outer surface of the iron core, and the electromagnetic force is directly transmitted to the entire housing; while in the bolt-fixed scheme, the mating part between the stator and housing is the axial positioning surface on the housing, and the circumferential gap between them cuts off the radial transmission path of the electromagnetic force, which plays a better role in suppressing the electromagnetic noise of the whole machine. However, in the current practical application of electric drive products, the interference fit between the stator and the housing is still the mainstream structure; its assembly accuracy and fit quality directly affect the motor performance. Therefore, the interference fit between the stator and the housing is an extremely critical process in the production of electric drive products.

[0003] The existing assembly process mainly consists of independent workstations such as oil ring lubrication and installation, stator keyway angular positioning and key pressing, housing heating, and stator housing assembly. The lubrication and installation of oil rings are generally done manually by workers. The key pressing and assembly processes require a separate servo press. This independent workstation design occupies a large space and requires a large number of devices, resulting in a sharp increase in costs and is time-consuming and labor-intensive.

[0004] Therefore, there is an urgent need for a fully automated assembly equipment and control method for electric drive motors to solve the technical problems of large equipment footprint, high cost, and low operating efficiency in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to provide an assembly device and method for electric drive motors, which can solve the technical problems of large equipment footprint, high cost, and low operating efficiency in the prior art. The specific solution is as follows:

[0006] An assembly device for an electric drive motor, comprising:

[0007] An oil ring lubrication device is installed on a frame to lubricate the conveyed oil ring and deliver the lubricated oil ring to the corresponding position below the oil ring mounting structure.

[0008] The oil ring mounting structure is configured to grip the lubricated oil ring delivered by the oil ring lubrication device and press the oil ring into the corresponding motor housing at the bottom.

[0009] A flat key conveying structure is used to convey the flat key to the bottom of the flat key mounting structure;

[0010] A parallel key mounting structure is used to assemble a parallel key into the keyway of the stator;

[0011] The stator conveying mechanism, slidably arranged on the platform, is used to move the stator with the flat key to the area below the stator mounting structure;

[0012] The stator mounting structure is used to grip the stator equipped with a flat key and assemble it into the corresponding motor housing below.

[0013] A method for controlling assembly equipment includes the following steps:

[0014] The oil ring is lubricated by an oil ring lubrication device, and the lubricated oil ring is then transported to the oil ring mounting structure.

[0015] The oil ring is pressed into the motor housing through the oil ring mounting structure. The motor housing with the oil ring is then fed into the heating equipment by a robot for heating. At the same time, the flat key is transported to the flat key mounting structure through the flat key conveying structure, and the flat key mounting structure is controlled to assemble the flat key into the keyway of the stator.

[0016] The stator with the flat key is moved to the bottom of the stator mounting structure by the stator conveying mechanism to complete the gripping process;

[0017] The robot moves the heated motor housing to below the stator mounting structure, and controls the stator mounting structure to assemble the stator into the corresponding motor housing below.

[0018] The above solution achieves the following beneficial technical effects:

[0019] This application provides an assembly equipment and control method for electric drive motors. By integrating multiple previously independent and dispersed assembly processes, such as automatic oil ring lubrication, oil ring pressing, key conveying and positioning assembly, stator transfer, and stator pressing, onto a single frame, a highly integrated electric drive motor assembly equipment is formed. This design overcomes the problems of traditional assembly methods, such as dispersed processes, cumbersome transfer, difficulty in guaranteeing positioning accuracy, and high reliance on manual labor. Furthermore, the functional modules are arranged in an orderly and coordinated manner along the frame. After lubrication, the oil ring can be directly and accurately conveyed to the assembly position, avoiding contamination, deformation, and positioning deviations caused by secondary handling. The key and stator adopt a step-by-step positioning and precise slot alignment assembly method, which improves the overall keyway fit accuracy and assembly success rate. After the key assembly is completed, the stator can be directly transferred to the assembly station for pressing with the motor housing. Ultimately, the entire process from oil ring lubrication, parts conveying, positioning and alignment to pressing and assembly is automated, reducing assembly failure rate and labor costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an assembly device for electric drive motors.

[0021] Figure 2 This is a schematic diagram of the connection structure of the oil ring lubrication device;

[0022] Figure 3 This is a schematic diagram of the oil ring mounting structure;

[0023] Figure 4 This is a schematic diagram of the flat key conveyor structure;

[0024] Figures 5 to 7 These are partial illustrations of a flat key conveyor structure;

[0025] Figure 8 and Figure 9 Schematic diagrams of the flat key pushing mechanism from different perspectives;

[0026] Figure 10 for Figure 1 A magnified view of a portion at point C;

[0027] Figure 11 This is a schematic diagram of the overall structure of the test bench.

[0028] 5 is the stator conveying mechanism; 6 is the stator mounting structure; 7 is the main drive mechanism; 100 is the oil ring; 200 is the stator; 300 is the motor housing; 400 is the frame. Detailed Implementation

[0029] To make the purpose, technical solution, and advantages of this application clearer, the following will be described in conjunction with the appendix. Figures 1 to 11This application will be described in further detail. It is obvious that the described embodiments are merely some, not all, of the embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments described herein without inventive effort are within the scope of protection of this application.

[0030] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The singular forms “a,” “said,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0031] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0032] It should be understood that although the terms first, second, third, etc., may be used in the embodiments of this application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, first may also be referred to as second without departing from the scope of the embodiments of this application, and similarly, second may also be referred to as first.

[0033] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0034] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0035] It should be noted that any symbols and / or numbers present in the specification that are not marked in the accompanying drawings are not reference numerals.

[0036] The optional embodiments of this application are described in detail below with reference to the accompanying drawings.

[0037] See Figure 1 As shown; 1 is the oil ring lubrication device; 2 is the oil ring mounting structure; 3 is the flat key mounting structure; 4 is the flat key conveying structure; 5 is the stator conveying mechanism; 6 is the stator mounting structure; 7 is the main drive mechanism; 100 is the oil ring; 200 is the stator; 300 is the motor housing; 400 is the frame.

[0038] according to Figure 1 The assembly equipment shown includes:

[0039] An oil ring lubrication device is installed on a frame to lubricate the conveyed oil ring and deliver the lubricated oil ring to the corresponding position below the oil ring mounting structure.

[0040] The oil ring mounting structure is configured to grip the lubricated oil ring delivered by the oil ring lubrication device and press the oil ring into the corresponding motor housing at the bottom.

[0041] A flat key conveying structure is used to convey the flat key to the bottom of the flat key mounting structure;

[0042] A parallel key mounting structure is used to assemble a parallel key into the keyway of the stator;

[0043] The stator conveying mechanism, slidably arranged on the platform, is used to move the stator with the flat key to the area below the stator mounting structure;

[0044] The stator mounting structure is used to grip the stator equipped with a flat key and assemble it into the corresponding motor housing below.

[0045] Specifically, this application integrates multiple previously independent and scattered assembly processes, such as automatic oil ring lubrication, oil ring press-fitting, key conveying and positioning assembly, stator transfer, and stator press-fitting, onto a single frame to form a highly integrated electric drive motor assembly equipment. This design overcomes the problems of traditional assembly methods, such as scattered processes, cumbersome transfer, difficulty in guaranteeing positioning accuracy, and high reliance on manual labor. Furthermore, the functional modules are arranged in an orderly and coordinated manner along the frame. After lubrication, the oil ring can be directly and accurately conveyed to the assembly position, avoiding contamination, deformation, and positioning deviations caused by secondary handling. The key and stator adopt a step-by-step positioning and precise slot alignment assembly method, which improves the overall keyway fit accuracy and assembly success rate. After the key assembly is completed, the stator can be directly transferred to the assembly station for press-fitting with the motor housing. Ultimately, this achieves full automation from oil ring lubrication, parts conveying, positioning and alignment to press-fitting assembly, reducing assembly failure rate and labor costs.

[0046] See Figure 1 and Figure 2As shown; 1 is an oil ring lubrication device; 10 is a first support; 11 is a first guide rail; 12 is a first slide table; 13 is a first magnetically coupled rodless cylinder; 14 is a second support; 15 is a first positioning block; 16 is a second positioning block; 161 is a limiting groove; 17 is a first lifting structure; 170 is a third support; 171 is a first lifting cylinder; 172 is an oil ring push plate; 173 is a guide support rod; 18 is a first rotating structure; 180 is an oil ring rotating servo motor; 181 is a lifting turntable; 182 is an anti-wear positioning block; 19 is an oil nozzle; 1A is a cross frame;

[0047] The oil ring lubrication device includes:

[0048] The first bracket is fixed to the right side of the platform;

[0049] The top of the first bracket is connected to the first slide via a first guide rail; wherein, the top of the first bracket is also provided with a first magnetically coupled rodless cylinder for driving the first slide to slide horizontally on the first guide rail;

[0050] A second bracket for supporting the oil ring is provided on the outside of the first slide; wherein, a square hole for the lifting turntable to pass through is provided in the middle of the second bracket.

[0051] The upper end of the second bracket is evenly arranged with a number of first positioning blocks for supporting the positioning oil ring and a second positioning block for positioning the oil ring; wherein, a limiting groove for positioning the oil ring is provided on one inner wall of the second positioning block.

[0052] First lifting structure for driving oil ring;

[0053] A first rotating structure for driving the oil ring to rotate is arranged on the first lifting structure;

[0054] It also includes: an oil nozzle connected to the first bracket; wherein the oil nozzle is connected to the upper part of the first bracket via a cross bracket and is used to spray lubricating grease into the oil ring.

[0055] Specifically, the oil ring lubrication device designed in this application uses a first magnetically coupled rodless cylinder and a first guide rail to drive the first slide table to move horizontally. The movement is smooth and the response is rapid, enabling precise transfer of the oil ring between the lubrication station and the assembly station. The second bracket uses multiple sets of first positioning blocks and second positioning blocks with limit grooves to support and position the oil ring, which can form a stable and reliable circumferential positioning and angular constraint on the oil ring, thereby preventing the oil ring from shaking, shifting or rotating during transfer and lubrication, and ensuring the consistent posture of the oil ring. In conjunction with the first lifting structure and the first rotating structure, the oil ring can be driven to lift and rotate, so that the lubricating grease sprayed from the grease nozzle can evenly and completely cover the mating surface of the oil ring, significantly improving the lubrication uniformity and lubrication effect.

[0056] In one specific implementation, the first lifting structure is located below the second support;

[0057] The first lifting structure includes:

[0058] A third support connected to the first support;

[0059] The first lifting cylinders on both sides of the third bracket are symmetrically arranged.

[0060] Oil ring push plate connected to the cylinder rod of the first lifting cylinder on both sides;

[0061] The first rotating structure includes:

[0062] An oil ring rotary servo motor is installed at the bottom of the oil ring push plate;

[0063] The output shaft of the oil ring rotary servo motor passes through the oil ring push plate and is connected to the lifting turntable;

[0064] The lifting turntable is equipped with anti-wear positioning blocks on both sides for receiving oil rings.

[0065] Also includes:

[0066] At least one guide support rod; the upper end of the guide support rod is fixed to the oil ring push plate, and the lower end is slidably inserted through the third bracket.

[0067] It is understood that the first lifting structure designed in this application is arranged below the second bracket. The oil ring push plate is driven to rise and fall by the first lifting cylinders symmetrically arranged on both sides, which can make the oil ring lift process evenly stressed and run smoothly. With the help of the guide support rod for guidance and limit, the oil ring push plate is further prevented from swaying or jamming during the lifting process, thus improving the stability and reliability of the lifting action. The oil ring rotation servo motor directly drives the lifting turntable to rotate, and with the anti-wear positioning blocks on both sides to support the oil ring, it can not only achieve stable support for the oil ring, but also reduce the wear on the surface of the oil ring and has high assembly precision.

[0068] See Figure 1 and Figure 3 As shown in the figure; 2 represents the oil ring mounting structure; 20 is the first holding cylinder; 21 is the first pressure head bracket; 22 is the oil ring auxiliary hydraulic cylinder; 23 is the oil ring clamping fixture; 24 is the pressure head connector; 25 is the hanging groove;

[0069] In one specific implementation, the oil ring mounting structure includes:

[0070] The first retaining cylinder is fixed to the top of the stand;

[0071] A first pressure head bracket connected to the cylinder rod of a first holding cylinder; wherein the first holding cylinder is used to hold the first pressure head bracket in the Z-direction position;

[0072] The first pressure head bracket is slidably connected to one side of the platform;

[0073] An oil ring auxiliary hydraulic cylinder is installed at the upper end of the first pressure head support; wherein, the free end of the bottom cylinder rod of the oil ring auxiliary hydraulic cylinder is provided with an oil ring clamping fixture (such as a three-jaw cylinder) for clamping or releasing the oil ring.

[0074] It also includes: a pressure head connector at the upper end of the first pressure head bracket; wherein, the upper end of the pressure head connector is provided with an I-shaped hanging groove that can be coupled with the main drive mechanism;

[0075] When the pusher at the bottom of the main drive mechanism moves into the hanging slot, a coupling connection is formed between the main drive mechanism and the pressure head connector. The main drive mechanism provides the main pressing force, driving the first pressure head bracket to move down as a whole.

[0076] It is understood that this application uses a first holding cylinder to maintain and initially position the first pressure head bracket in the Z-direction. Combined with the sliding guide between the first pressure head bracket and the platform, Q ensures smooth movement and high positioning accuracy during the pressing process. The oil ring is stably clamped and released by a hydraulic cylinder driven by an oil ring-assisted clamping device. Moreover, only the gripping and positioning action of the oil ring needs to be completed, without bearing the main pressing load, resulting in a fast response. In terms of design, a quick coupling connection is formed between the I-shaped groove on the pressure head connector and the pusher of the main drive mechanism, with the main drive mechanism providing a stable main pressing force to achieve efficient pressing of the oil ring. This design not only achieves stability of the pressing force and assembly accuracy but also avoids the small-stroke oil ring-assisted hydraulic cylinder directly bearing the pressing load, thus improving the overall reliability and service life of the structure.

[0077] See Figure 1 As shown; 7 is the main drive structure; 71 is the linear module; 72 is the main servo motor;

[0078] It also includes: a main drive mechanism that is slidably mounted on the frame; the main drive mechanism can be coupled to the oil ring mounting structure, the stator mounting structure or the flat key mounting structure respectively, and after coupling, it provides a downward vertical pressing force to each mounting structure;

[0079] The main drive mechanism includes:

[0080] A linear module fixed on a frame, and a main servo motor driven and connected to the linear module; the main servo motor is slidably arranged on the frame and driven by the linear module to move horizontally along the frame.

[0081] The output shaft of the main servo motor is equipped with a pusher (not shown in the figure).

[0082] The pusher is used to couple with the pressure head connector at the top of each mounting structure.

[0083] It is understood that the servo motor designed in this application is slidably arranged on the frame to ensure smooth movement and rapid response. Moreover, it can flexibly move to the corresponding workstation according to assembly requirements and reliably couple with each installation structure. After coupling, the main servo motor provides a stable and controllable vertical pressing force to ensure the pressure uniformity and assembly accuracy during the pressing process. The pressing requirements of multiple workstations can be met by a single main drive mechanism, realizing the sharing and reuse of pressing power. Overall, it simplifies the overall structure of the equipment and reduces production costs and space occupancy.

[0084] See Figure 1 , Figures 4 to 7 As shown; 4 is the key conveying structure; 4A is the arc track; 40 is the key vibratory feeder; 41 is the key receiving platform; 42 is the key support; 43 is the displacement limiting groove; 44 is the drive motor; 45 is the key traction upper hole; 46 is the key support block; 47 is the key traction lower hole; 48 is the key pushing mechanism.

[0085] The flat key conveying structure includes:

[0086] A flat key vibratory feeder is used to transport flat keys along an arc-shaped track with an inner groove to a flat key receiving platform.

[0087] The receiving platform is slidably connected to the flat key bracket; wherein, the front end of the receiving platform is provided with a displacement limiting groove that freely cooperates with the arc-shaped track, and the horizontal movement of the receiving platform is limited by the displacement limiting groove.

[0088] A drive motor fixed on a flat key bracket; wherein the output end of the drive motor is fixedly connected to the receiving platform;

[0089] One side of the displacement limiting groove is provided with a key traction upper hole for traction key movement.

[0090] The bottom of the receiving platform is provided with a flat key support block on the flat key bracket; wherein, one side of the flat key support block is provided with a flat key traction lower hole that corresponds to the position of the flat key traction upper hole;

[0091] It also includes: a flat key pushing mechanism mounted on the platform;

[0092] The flat key pushing mechanism is used to transfer the flat key and push it onto the flat key mounting structure;

[0093] When the flat key pushing mechanism moves to the corresponding position at the bottom of the flat key support block, the flat key on the arc track is received by the receiving platform through the flat key traction upper hole, and the flat key is moved relative to the flat key support block until the flat key traction upper hole is aligned with the flat key traction lower hole. Then, the flat key falls into the flat key pushing mechanism through the flat key traction lower hole, and the flat key pushing mechanism sends the flat key upward into the lower end of the flat key mounting structure.

[0094] Specifically, the automatic feeding and orderly conveying of the flat key is achieved through a combination of a vibratory feeder and an arc-shaped track. Precise limiting of the travel stroke is achieved through displacement limiting grooves on the receiving platform, ensuring stable and reliable flat key conveying. The alignment and cooperation of the upper and lower traction holes of the flat key ensures precise key unloading and smooth transfer, avoiding key jamming, skewness, or misalignment during conveying. The designed receiving platform is independently driven by a drive motor, offering high positioning accuracy. Based on this, a flat key support block provides stable support and guidance for the flat key. The overall structure achieves full automation of the flat key process from feeding, conveying, precise receiving to automatic pushing and transfer, improving overall flat key conveying efficiency and assembly success rate, and reducing the risk of manual intervention and component damage.

[0095] See Figures 8 to 9 As shown in the figure; 48 is the flat key pushing mechanism; 48A is the flat key transfer bracket; 480 is the first conveying bracket; 481 is the first transfer cylinder drive; 482 is the second conveying bracket; 483 is the second transfer cylinder drive; 484 is the flat key transfer block; 485 is the flat key hole; 486 is the ejector pin; 487 is the ejector pin drive cylinder.

[0096] In this embodiment, the flat key is placed vertically inside the flat key hole.

[0097] The flat key pushing mechanism includes:

[0098] A flat key transfer bracket fixed on the platform;

[0099] A first conveying bracket is slidably arranged on one side of the top of the flat key transfer bracket; wherein the first conveying bracket is driven by a first transfer cylinder arranged on the flat key transfer bracket.

[0100] A second conveying bracket is slidably arranged on one side of the first conveying bracket; wherein the second conveying bracket is driven by a second transfer cylinder arranged on the first conveying bracket;

[0101] A key transfer block is arranged on the second conveying support; wherein, the key transfer block is provided with a key hole for receiving the key;

[0102] A ejector pin for ejecting the key is slidably installed inside the key hole.

[0103] A pin drive cylinder is located at the lower end of the pin; wherein, the pin drive cylinder is arranged on the second conveying bracket and is used to push the pin upward to push the flat key in the flat key hole into the lower end of the flat key mounting structure.

[0104] It is understood that this application achieves multi-segment displacement conveying by driving the first and second conveying brackets with the first and second transfer cylinders respectively. This allows for flexible adjustment of the horizontal position of the key transfer block, enabling precise and stable transfer of the key between the conveying station and the assembly station. The key hole on the key transfer block can stably receive the key, and together with the ejector pin and ejector pin drive cylinder, it achieves precise upward pushing assembly of the key, ultimately ensuring that the key can be delivered into the key mounting structure in a stable posture. The advantage of this design is that it improves the overall stability, consistency, and assembly efficiency of the key assembly.

[0105] The key mounting structure, oil ring mounting structure, and stator mounting structure are arranged in parallel on the frame, and each mounting structure is provided with a pressure head connector on its top that can be coupled to the main drive mechanism.

[0106] It should be noted that the overall structure of the key mounting structure, the oil ring mounting structure and the stator mounting structure is the same. The difference is that the oil ring auxiliary hydraulic cylinder of each tool has a clamping tool at the free end of the cylinder rod. The clamping tool at the bottom of the key mounting structure is a clamping groove for elastically clamping the key. The clamping tool at the bottom of the stator mounting structure is a clamping tool (such as a two-jaw cylinder) for gripping the stator.

[0107] See Figure 10 In the figure, 5 is the stator conveying mechanism; 51 is the first stator support; 52 is the second magnetically coupled rodless cylinder; 53 is the second stator support; 54 is the stator clamping structure; 540 is the first clamping frame; 541 is the second clamping frame; and 542 is the second drive cylinder.

[0108] The stator conveying structure includes:

[0109] A first stator support that slides horizontally on one side of a platform; wherein the bottom of the first stator support is connected to a second magnetically coupled rodless cylinder via a second slide table;

[0110] A second stator bracket that slides vertically outside the first stator bracket; wherein, a first drive cylinder (not shown in the figure) is provided on one side of the first stator bracket for driving the second stator bracket to slide.

[0111] A stator clamping structure that slides horizontally on the outside of a second stator support; wherein a second drive cylinder for driving the stator clamping structure to slide is provided on one side of the second stator support;

[0112] The stator clamping structure includes: a first clamping frame and a second clamping frame arranged opposite to each other;

[0113] The first clamping bracket is fixedly installed on the second stator bracket.

[0114] The second drive cylinder is fixed to the top of the first clamping frame;

[0115] The second clamping bracket is connected to the output end of the second drive cylinder and is slidably mounted on the second stator support.

[0116] It is understood that the stator conveying structure involved in this application uses a second magnetically coupled rodless cylinder and a second slide to drive the first stator support to move horizontally. The movement is smooth, impact-free, and highly accurate, enabling efficient transfer of the stator between different assembly stations. The first and second drive cylinders control the sliding of the second stator support and the stator clamping structure in the vertical and horizontal directions, respectively, forming a multi-dimensional adjustable conveying path that can adapt to the gripping and transfer needs of stators of different specifications. The stator clamping structure adopts a clamping method with a first clamping frame fixed on one side and a second clamping frame on the other side driven by the second drive cylinder to slide. The clamping action is stable and reliable, ensuring the stability of the stator's posture and positioning accuracy during the conveying process.

[0117] On the other hand, this application provides a method for controlling assembly equipment, including the following steps:

[0118] The oil ring is lubricated by an oil ring lubrication device, and the lubricated oil ring is then transported to the oil ring mounting structure.

[0119] The oil ring is pressed into the motor housing through the oil ring mounting structure. The motor housing with the oil ring is then fed into the heating equipment by a robot for heating. At the same time, the flat key is transported to the flat key mounting structure through the flat key conveying structure, and the flat key mounting structure is controlled to assemble the flat key into the keyway of the stator.

[0120] The stator with the flat key is moved to the bottom of the stator mounting structure by the stator conveying mechanism to complete the gripping process;

[0121] The robot moves the heated motor housing to below the stator mounting structure, and controls the stator mounting structure to assemble the stator into the corresponding motor housing below.

[0122] 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 them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An assembly device for electric drive motors, characterized in that, include: An oil ring lubrication device is installed on a frame to lubricate the conveyed oil ring and deliver the lubricated oil ring to the corresponding position below the oil ring mounting structure. The oil ring mounting structure is configured to grip the lubricated oil ring delivered by the oil ring lubrication device and press the oil ring into the corresponding motor housing at the bottom. A flat key conveying structure is used to convey the flat key to the bottom of the flat key mounting structure; A parallel key mounting structure is used to assemble a parallel key into the keyway of the stator; The stator conveying mechanism, slidably arranged on the platform, is used to move the stator with the flat key to the area below the stator mounting structure; The stator mounting structure is used to grip the stator equipped with a flat key and assemble it into the corresponding motor housing below.

2. The assembly equipment for electric drive motors according to claim 1, characterized in that, The oil ring lubrication device includes: The first bracket is fixed to one side of the platform; The top of the first bracket is connected to the first slide via a first guide rail; wherein, the top of the first bracket is also provided with a first magnetically coupled rodless cylinder for driving the first slide to slide horizontally on the first guide rail; A second bracket for supporting the oil ring is provided on one side of the first slide; several first positioning blocks for supporting and positioning the oil ring and second positioning blocks for positioning the oil ring are evenly arranged along the same circular axis at the upper end of the second bracket; wherein, a limiting groove for positioning the oil ring is provided on one inner wall of the second positioning block. First lifting structure for driving oil ring; A first rotating structure for driving the oil ring to rotate is arranged on the first lifting structure; It also includes: an oil nozzle connected to the first bracket; wherein the oil nozzle is connected to the upper part of the first bracket via a cross bracket and is used to spray lubricating grease into the oil ring.

3. The assembly equipment for electric drive motors according to claim 2, characterized in that, The first lifting structure is located below the second bracket; The first lifting structure includes: A third support connected to the first support; The first lifting cylinders on both sides of the third bracket are symmetrically arranged. Oil ring push plate connected to the cylinder rod of the first lifting cylinder on both sides; An oil ring rotary servo motor is installed at the bottom of the oil ring push plate; The output shaft of the oil ring rotary servo motor passes through the oil ring push plate and is connected to the lifting turntable; The lifting turntable is equipped with anti-wear positioning blocks on both sides for receiving oil rings. Also includes: At least one guide support rod; the upper end of the guide support rod is fixed to the oil ring push plate, and the lower end is slidably inserted through the third bracket.

4. The assembly equipment for electric drive motors according to claim 3, characterized in that, The oil ring mounting structure includes: The first retaining cylinder is fixed to the top of the stand; A first pressure head bracket connected to the cylinder rod of a first holding cylinder; wherein the first holding cylinder is used to hold the first pressure head bracket in the Z-direction position; The first pressure head bracket is slidably connected to one side of the platform; An oil ring auxiliary hydraulic cylinder is installed at the upper end of the first pressure head support; wherein, the free end of the bottom cylinder rod of the oil ring auxiliary hydraulic cylinder is provided with an oil ring clamping fixture for clamping or releasing the oil ring. It also includes: a pressure head connector at the upper end of the first pressure head bracket; wherein, the upper end of the pressure head connector is provided with an I-shaped hanging groove that can be coupled with the main drive mechanism; When the pusher at the bottom of the main drive mechanism moves into the hanging slot, a coupling connection is formed between the main drive mechanism and the pressure head connector. The main drive mechanism provides the main pressing force, driving the first pressure head bracket to move down as a whole.

5. The assembly equipment for electric drive motors according to claim 4, characterized in that, It also includes: a main drive mechanism that is slidably mounted on the frame; the main drive mechanism can be coupled to the oil ring mounting structure, the stator mounting structure or the flat key mounting structure respectively, and after coupling, it provides a downward vertical pressing force to each mounting structure; The main drive mechanism includes: A linear module fixed on a frame, and a main servo motor driven and connected to the linear module; the main servo motor is slidably arranged on the frame and driven by the linear module to move horizontally along the frame. The output shaft of the main servo motor is equipped with a pusher at its bottom.

6. The assembly equipment for electric drive motors according to claim 5, characterized in that, The flat key conveying structure includes: A flat key vibratory feeder is used to transport flat keys along an arc-shaped track with an inner groove to a flat key receiving platform. The receiving platform is slidably connected to the flat key bracket; wherein, the front end of the receiving platform is provided with a displacement limiting groove that freely cooperates with the arc-shaped track, and the horizontal movement of the receiving platform is limited by the displacement limiting groove. A drive motor fixed on a flat key bracket; wherein the output end of the drive motor is fixedly connected to the receiving platform; One side of the displacement limiting groove is provided with a key traction upper hole for traction key movement. The bottom of the receiving platform is provided with a flat key support block on the flat key bracket; wherein, one side of the flat key support block is provided with a flat key traction lower hole that corresponds to the position of the flat key traction upper hole; It also includes: a flat key pushing mechanism mounted on the platform; The flat key pushing mechanism is used to transfer the flat key and push it onto the flat key mounting structure; When the flat key pushing mechanism moves to the corresponding position at the bottom of the flat key support block, the flat key on the arc track is received by the receiving platform through the flat key traction upper hole, and the flat key is moved relative to the flat key support block until the flat key traction upper hole is aligned with the flat key traction lower hole. Then, the flat key falls into the flat key pushing mechanism through the flat key traction lower hole, and the flat key pushing mechanism sends the flat key upward into the lower end of the flat key mounting structure.

7. The assembly equipment for electric drive motors according to claim 6, characterized in that, The flat key pushing mechanism includes: A flat key transfer bracket fixed on the platform; A first conveying bracket is slidably arranged on one side of the top of the flat key transfer bracket; wherein the first conveying bracket is driven by a first transfer cylinder arranged on the flat key transfer bracket. A second conveying bracket is slidably arranged on one side of the first conveying bracket; wherein the second conveying bracket is driven by a second transfer cylinder arranged on the first conveying bracket; A key transfer block is arranged on the second conveying support; wherein, the key transfer block is provided with a key hole for receiving the key; A ejector pin for ejecting the key is slidably installed inside the key hole. A pin drive cylinder is located at the lower end of the pin; wherein, the pin drive cylinder is arranged on the second conveying bracket and is used to push the pin upward to push the flat key in the flat key hole into the lower end of the flat key mounting structure.

8. The assembly equipment for electric drive motors according to claim 7, characterized in that, The key mounting structure, oil ring mounting structure, and stator mounting structure are arranged in parallel on the frame, and each mounting structure is provided with a pressure head connector on its top that can be coupled to the main drive mechanism.

9. The assembly equipment for electric drive motors according to claim 8, characterized in that, The stator conveying structure includes: A first stator support that slides horizontally on one side of a platform; wherein the bottom of the first stator support is connected to a second magnetically coupled rodless cylinder via a second slide table; A second stator bracket that slides vertically outside the first stator bracket; wherein, a first drive cylinder for driving the second stator bracket to slide is provided on one side of the first stator bracket; A stator clamping structure that slides horizontally on the outside of a second stator support; wherein a second drive cylinder for driving the stator clamping structure to slide is provided on one side of the second stator support; The stator clamping structure includes: a first clamping frame and a second clamping frame arranged opposite to each other; The first clamping bracket is fixedly installed on the second stator bracket. The second drive cylinder is fixed to the top of the first clamping frame; The second clamping bracket is connected to the output end of the second drive cylinder and is slidably mounted on the second stator support.

10. A method for controlling assembly equipment, characterized in that, Includes the following steps: The oil ring is lubricated by an oil ring lubrication device, and the lubricated oil ring is then transported to the oil ring mounting structure. The oil ring is pressed into the motor housing through the oil ring mounting structure. The motor housing with the oil ring is then fed into the heating equipment by a robot for heating. At the same time, the flat key is transported to the flat key mounting structure through the flat key conveying structure, and the flat key mounting structure is controlled to assemble the flat key into the keyway of the stator. The stator with the flat key is moved to the bottom of the stator mounting structure by the stator conveying mechanism to complete the gripping process; The robot moves the heated motor housing to below the stator mounting structure, and controls the stator mounting structure to assemble the stator into the corresponding motor housing below.

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