Motor transmission assembling system and assembling method thereof

Abstract

The invention provides a motor transmission assembling system. The motor transmission assembling system comprises an assembling conveying line, a box cover temporary storage line and assembling equipment. The assembly conveying line and the box cover temporary storage line are conveying paths composed of conveying devices. The conveying device comprises a conveyor, a tray and a control system; the conveyor comprises a supporting frame and a transmission conveying piece, the transmission conveying piece is installed on the supporting frame, and a limiting device for limiting stopping or releasing of the trays is further installed on the supporting frame. Rollers are mounted on the lower surfaces of four corners of the tray; the outer sides of the rollers are exposed out of the edge of the tray; and the control system is electrically connected with the conveyor, the acceleration sensor, the display screen and the alarm device. The invention further provides control logic and an assembly method. According to the invention, the stability of long-distance conveying is ensured, and the problem of deviation or unbalance is not easy to generate. Unbalance or deviation of tray transfer due to vibration is prevented, the influence of vibration on assembly quality is avoided, timely treatment is achieved, system unbalance is avoided, automatic assembly is achieved, the product quality and the operation efficiency of an assembly line are improved, and the yield is high.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission assembly, and in particular to a motor transmission assembly system and an assembly method thereof. Background Art

[0002] In the transmission assembly production line, the conveyor is a commonly used parts transportation equipment, and its operating stability directly affects the production efficiency and product quality. However, due to the fact that the conveyor belt may deviate, become unbalanced, or the conveying speed is not controlled, the conveying speed is fast, resulting in increased vibration, especially at the position where the material stops, which is more likely to cause vibration, and may affect the normal operation of the production line. Existing assembly lines often do not pay attention to the vibration problem of conveying, and it is difficult to detect the vibration of the assembly line conveying in time. The performance of the finished product is only tested at the end of the assembly, and no intervention is made during the assembly process to reduce the vibration, which often leads to a low yield rate. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a motor transmission assembly system and an assembly method thereof.

[0004] To achieve the above object, the present invention adopts the following technical solutions: A motor transmission assembly system, comprising an assembly conveyor line, a box cover buffer line and assembly equipment; The assembly conveyor line and the box cover buffer line are conveying paths formed by conveying devices; the assembly equipment is arranged on the assembly conveyor line and the box cover buffer line; The conveying device includes a conveyor, a pallet and a control system; the conveyor includes a support frame and a transmission conveying member, the transmission conveying member is installed on the support frame, and a limit device for limiting the stop or release of the pallet is also installed on the support frame; rollers are installed on the lower surface of the four corners of the pallet, and the outer side of the rollers exposes the edge of the pallet; The conveying device is also provided with an acceleration sensor, a display screen and an alarm device; the control system is electrically connected to the conveyor, the acceleration sensor, the display screen and the alarm device.

[0005] Further, the support frame includes a leg and a support box, the leg is fixed to the bottom of the support box, the transmission transport member includes a driving motor, a driving wheel group, a driven wheel group and a transmission assembly; the driving wheel group includes a first rotating shaft, a first wheel body and a connecting shaft, the first wheel body is fixed at both ends of the first rotating shaft, the connecting shaft is fixed on the outside of the first wheel body, the first rotating shaft, the wheel body and the connecting shaft are concentrically arranged, and the connecting shaft is connected to the output shaft of the driving motor; the driven wheel group includes a second rotating shaft and a second wheel body; the second wheel body is respectively fixed at both ends of the second rotating shaft; the first rotating shaft and the second rotating shaft or two adjacent second rotating shafts are connected by the transmission assembly; the transmission assembly includes a pulley and a conveyor belt, the pulley is installed on the first rotating shaft or the second rotating shaft; the transmission belt connects the pulleys on the adjacent first rotating shaft or the second rotating shaft. The control system is electrically connected to the driving motor.

[0006] Furthermore, a plurality of acceleration sensors are provided, an acceleration sensor is provided on the bearing seat of the first rotating shaft, and acceleration sensors are respectively provided on the bearing seats on the front side of the limiting device and closest to the limiting device.

[0007] Furthermore, an opening is provided at the top of the support box at a position corresponding to the first wheel body or the second wheel body, and the upper parts of the first wheel body and the second wheel body are exposed from the upper surface of the support box; Baffles are fixed on both sides of the upper surface of the support box, and the baffles are arranged along the length direction of the support box; the tray is arranged above the support box, and the rollers are attached to the baffles on both sides of the support box; The limiting device is also installed in the support box, and a rectangular opening is provided on the support box corresponding to the position of the limiting device; the upper part of the limiting device is exposed from the upper surface of the support box through the rectangular opening to limit the pallet.

[0008] Furthermore, the assembly equipment includes a truss manipulator, a heating device, a dust blowing device, a bearing press, a gluing device, a top cover press, an automatic screw machine, an oil seal air press, a performance testing device and a lift; The heating device is arranged near the end of the box cover cache line, and a manipulator is also arranged at the heating device to grab the box cover; the assembly conveyor line includes a first support box assembly section, a second support box assembly section, and a box body testing section; The first support box assembly section is provided with a dust blowing device and a bearing press, and the second support box assembly section is provided with the gluing device, the upper cover press, the automatic screw machine, and the oil seal air press in sequence from front to back; a turning machine is also provided between the automatic screw machine and the oil seal air press; the end of the box cover cache line is located in front of the upper cover press, and a truss manipulator is provided at the end of the box cover cache line; the box body testing section is provided with the performance detection device; and the elevator is provided at the end of the assembly conveyor line.

[0009] Furthermore, the assembly conveyor line and the box cover cache line are arranged in parallel, the front end of the box cover cache line is flush with the front end of the assembly conveyor line, and the end of the box cover cache line is arranged close to the upper cover pressing device.

[0010] Furthermore, the control system includes a control logic; the control logic includes the following steps: 1) Collect vibration data; Collect the original acceleration signal obtained by the sensor in real time; 2) Filter the vibration data; filter it through a low-pass filter to remove high-frequency noise and irrelevant signals; 3) Obtaining a time-domain acceleration signal with a large amplitude; Use the time window sliding method to obtain a time domain acceleration signal with a large amplitude; 4) Use fast Fourier transform to convert the time domain acceleration signal into frequency domain signal; 5) Calculate the amplitude spectrum and draw the frequency domain amplitude diagram; Take the absolute value of the fast Fourier transform output as the amplitude of the frequency domain signal, correspond the amplitude value of the frequency domain to the corresponding frequency axis, draw a spectrum diagram, and display the spectrum diagram on the display screen; 6) Analyze the frequency domain amplitude diagram; 61) Set a threshold to determine whether an abnormality exists; find the peak point in the spectrum graph that is greater than the threshold. If there is a peak point greater than the threshold, it is determined that an abnormality exists; otherwise, there is no abnormality; 62) Use classification algorithms to train models; The spectrograms of different frequency components are used as input to train the classification algorithm model to identify different signal patterns; 63) Determine the cause of the abnormality; Input the spectrum graph judged to be abnormal in 61) into the trained model to identify the signal pattern and determine the fault type; 7) Determine if it is a resonance phenomenon and automatically adjust the speed; If the fault type is determined to be resonance, the control system sends a deceleration command to control the speed of the drive motor to decelerate by 90%-95%; 8) If it is determined to be other fault types that are non-resonance phenomena, the control system sends an alarm instruction to the alarm device to control the alarm device to alarm.

[0011] Furthermore, the classification algorithms include SVM, neural network, and decision tree; the signal patterns include signal patterns of different fault types such as resonance phenomenon, shaft imbalance, gear fault, and bearing fault.

[0012] Furthermore, step 3) specifically includes: setting a window size of 2-5 seconds, sliding the window on the processed acceleration signal, and calculating the root mean square value of the acceleration signal in the window each time the window slides; setting an indicator threshold, comparing the calculated root mean square value with the indicator threshold, and if the root mean square value is greater than the indicator threshold, extracting the acceleration signal of the 5-second time period before and after the window as the time domain acceleration signal with a larger amplitude.

[0013] An assembly method of a motor transmission assembly system comprises the following steps: S1: Gear set pre-assembly preparation; S2: box cover is put on line; Manually put the box cover on the box cover cache line; place the box cover on the tray on the box cover cache line; the box cover cache line transports the box cover to the heating equipment, and the robot grabs the box cover to the heating equipment for heating until the heating is completed; S3: initial cabinet assembly; When the case cover is put on line, the case of the transmission is blown off dust at the front end of the assembly conveyor line; The pallet carries the box to the first support box assembly section, where a limit device is provided. The limit device stops the pallet, and the bearing chamber in the box is manually oiled, and the bearing is press-fitted using a bearing press machine. After using a dust blowing device to blow dust off the spare gear set assembled in S1, install the gear set into the box; After the gear set is installed, the limit device is started, the pallet is released, and the assembly conveyor line conveys the pallet to the second support box assembly section; S4: Later cabinet assembly; First, glue is applied to the fixed end surface of the box using a glue coating device; Next, use the truss manipulator to grab the box cover and bring it to the assembly conveyor line to assemble the box cover; Then, use the upper cover pressing device to press the box cover. After the pressing is completed, turn to the automatic screw machine to assemble the bolts or screws; Finally, the transmission is turned 180° by a turning machine and transported to the oil seal air press, where the oil seal is pressed and installed; S5: box test; The assembled transmission is released to the box test section, and the air tightness test is carried out on the assembled transmission using a performance detection device; transmissions with poor air tightness are removed, and transmissions with good air tightness are manually oiled. After the oiling is completed, the transmission is transferred to the elevator, and then transferred to the next step of motor assembly.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention no longer uses traditional conveyor belts for transportation, ensuring the stability of long-distance transportation, and the torque changes more smoothly, effectively reducing the vibration phenomenon caused by transportation, reducing the vibration amplitude of the pallet on the conveyor line, avoiding the impact of vibration on the quality of the assembled product, and not prone to offset or imbalance problems during long-term use. Ensure long-term stability. (2) The present invention is provided with control logic to analyze the collected acceleration signal, determine the type of fault, and automatically reduce the speed to avoid the resonance frequency, avoid the strong vibration caused by the resonance to cause a fault, affect the life of the conveying device, prevent the pallet from being unbalanced or offset due to vibration during transportation, and avoid vibration affecting the assembly quality. The present invention can ensure the smooth operation of the system by controlling and avoiding the resonance phenomenon, improve the overall transportation efficiency, and reduce downtime. It can also give an alarm in time to ensure that the production line fault is discovered in time, and the cause of the fault can be promptly investigated and handled in time to prevent the production line from being paralyzed, and avoid system imbalance, resulting in low yield. (3) The present invention is provided with assembly equipment, which improves production efficiency, reduces human intervention, and improves the stability and quality control of the production process through automated assembly. Through the application of automated equipment, human errors in production can be effectively reduced, labor costs can be reduced, and the accuracy and consistency of production can be improved, ultimately improving the overall quality of the product and the operating efficiency of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the motor transmission assembly system of the present invention; Figure 2 A schematic diagram of the structure of a conveyor of a motor transmission assembly system of the present invention; Figure 3 A schematic diagram of the structure of a tray of the motor transmission assembly system of the present invention; Figure 4 A flow chart of the control logic of the motor transmission assembly system of the present invention. DETAILED DESCRIPTION

[0016] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0017] like Figure 1 , Figure 2 and Figure 3 As shown, a motor transmission assembly system includes an assembly conveyor line 1, a box cover cache line 2 and assembly equipment, wherein the assembly equipment includes a truss manipulator 3, a heating device 4, a dust blowing device 5, a bearing press 6, a gluing device 7, an upper cover press 8, an automatic screw machine 9, an oil seal air press 10, a performance detection device 11 and a lift 12, etc.; the transmission is installed and assembled, and only the assembly is performed, which reduces the labor workload of workers and improves the assembly output.

[0018] The assembly conveyor line 1 and the box cover cache line 2 are conveying paths formed by conveying devices; the heating device 4 is arranged near the end of the box cover cache line 2, and a manipulator 14 is also arranged at the heating device 4 to grab the box cover; the assembly conveyor line 1 includes a first support box assembly section, a second support box assembly section, a box body testing section, etc. The first support box assembly section is provided with a dust blowing device 5 and a bearing press 6, and the second support box assembly section is provided with the gluing device 7, the upper cover press device 8, the automatic screw machine 9, and the oil seal air press 10 in sequence from front to back; a turning machine 13 is also arranged between the automatic screw machine 9 and the oil seal air press 10, which is used to turn the transmission 180°; the end of the box cover cache line 2 is located in front of the upper cover press device 8, and a truss manipulator 3 is arranged at the end of the box cover cache line 2 to grab the box cover to the assembly conveyor line; the performance detection device 11 is arranged in the box body testing section; the elevator 12 is arranged at the end of the assembly conveyor line 1 to transport the assembled transmission to the next step for assembly with the motor.

[0019] The assembly conveyor line 1 and the box cover cache line 2 are arranged in parallel, the front end of the box cover cache line 2 is flush with the front end of the assembly conveyor line 1, and the end of the box cover cache line 2 is arranged close to the upper cover pressing device 8. The assembly conveyor line is beautiful, saves plant space, and improves space utilization efficiency. The box cover cache line 2 is operated by a manipulator, which reduces the number of personnel, saves personnel operation space, ensures the cleanliness of the box cover, and can be loaded on the same side, which is convenient for parts loading. Assembly conveyor lines can also be set on both sides of a box cover cache line to greatly improve assembly output.

[0020] The conveying device includes a conveyor 100, a pallet 200 and a control system. The conveyor 100 includes a support frame 110 and a transmission conveying member 120. The transmission conveying member 120 is installed on the support frame 110. A limiting device 300 for limiting the position of the pallet to stop or release is also installed on the support frame 110. Each assembly equipment room of the assembly conveyor line is provided with a limiting device 300. It is convenient to limit the position of the pallet to stop at the assembly equipment and perform assembly operations. It is simple and convenient to use.

[0021] The support frame 110 includes a leg 111 and a support box 112, wherein the leg 111 is fixed to the bottom of the support box 112, and the transmission transport member 120 is installed in the support box 112; the transmission transport member 120 includes a driving motor, a driving wheel group 121, a driven wheel group 122 and a transmission assembly 123; the driving wheel group 121 includes a first rotating shaft 1211, a first wheel body 1212 and a connecting shaft 1213, wherein the first wheel body 1212 is fixed to both ends of the first rotating shaft 1211, and the connecting shaft 1213 is fixed to the outside of the first wheel body 1212, wherein the first rotating shaft 1211, the wheel body 1212 and the connecting shaft 1213 are concentrically arranged, and the connecting shaft 1213 is connected to the output shaft of the driving motor. The control system is electrically connected to the driving motor to control the parameters of the driving motor transmission. The driven wheel assembly 122 includes a second rotating shaft 1221 and a second wheel body 1222; the second wheel body 1221 is respectively fixed at both ends of the second rotating shaft 1222. The first rotating shaft 1211 and the second rotating shaft 1221 are installed on the inner bottom of the support box 112 using axle seats, and the first rotating shaft 1211 and the second rotating shaft 1221 or two adjacent second rotating shafts 1221 are connected using the transmission assembly 123; the top of the support box 112 is provided with an opening 113 corresponding to the position of the first wheel body 1212 or the second wheel body 1222, and the upper parts of the first wheel body 1212 and the second wheel body 1222 are exposed from the upper surface of the support box 112; baffles 114 are fixed on both sides of the upper surface of the support box 112, and the baffles 114 are arranged along the length direction of the support box 112. The present invention no longer uses traditional conveyor belts for transportation, ensuring the stability of long-distance transportation, and the torque changes more smoothly, effectively reducing the vibration caused by transportation, reducing the vibration amplitude of the pallet 200 on the conveyor line, avoiding vibration affecting the quality of assembled products, and not prone to offset or imbalance problems in long-term use, ensuring long-term stability.

[0022] The transmission assembly 123 includes a pulley 1231 and a conveyor belt 1232. The pulley 1231 is installed on the first rotating shaft 1211 or the second rotating shaft 1221, and the transmission belt 1232 connects the pulleys 1231 on the adjacent first rotating shaft or the second rotating shaft. It is ensured that the driving wheel group 121 can drive the multiple driven wheel groups 122 to rotate through the transmission assembly 123 to realize the transportation of the pallet 200. The power transmission of the transmission assembly 123 enables the entire conveyor belt to maintain a stable speed during operation, avoiding the jumping or jamming of materials such as the box body and the box cover during the transportation process, and improving the stability of transportation in long-distance transportation. Reduce the possibility of vibration to prevent the quality of the assembled finished product from being affected.

[0023] Rollers 210 are installed on the lower surface of the four corners of the tray 200; the center of the roller 210 is connected and fixed to the tray 200 through a pin 220, and the radius of the roller 210 is greater than the distance between the center of the pin 220 and the two sides of the corresponding corner, ensuring that the outer side of the roller 210 is exposed to the edge of the tray 200; the tray 200 is set above the support box 112, and the roller 210 is in contact with the baffles 114 on both sides of the support box. This makes the friction between the tray 200 and the baffle 114 low, and when the tray 200 is transported in the track formed by the baffles on both sides, the friction of the edge of the tray 200 is avoided, the transportation efficiency is improved, and the movement of the tray 200 during the transportation process is ensured to be smoother, avoid the vibration caused by the jamming phenomenon, reduce wear, and ensure the long service life of the conveyor line. The roller 210 is designed to guide the pallet to move in a direction parallel to the track, reduce the deviation of the pallet 200 due to uneven tracks or during transportation, stabilize the conveying direction of the pallet, avoid deviation and imbalance problems during long-term use, ensure the balance of the pallet, and reduce the possibility of vibration.

[0024] The limiting device 300 is also installed in the support box 112, and a rectangular opening 115 is provided on the support box corresponding to the position of the limiting device 300; the limiting device 300 is a stopper. Under normal conditions, the upper part of the limiting device 300 is exposed from the upper surface of the support box through the rectangular opening 115 to limit the pallet. When the limiting device 300 is started to release, the limiting device is retracted into the support box 112. The flexibility of the assembly line is ensured, and the components of the assembled products can ensure that the materials are accurately parked at the predetermined positions, the assembly efficiency is improved, and the smooth progress of each process is ensured.

[0025] The conveying device is also provided with an acceleration sensor 400, a display screen and an alarm device. The acceleration sensor 400 is provided in multiple numbers for collecting vibration data of the conveyor belt in real time. The acceleration sensor 400 is provided on the bearing seat of the first rotating shaft 1211, and the acceleration sensor 400 is provided on the bearing seat closest to the limiting device on the front side of the limiting device 300; the acceleration sensor 400 detects the acceleration of the first rotating shaft and the second rotating shaft; the display screen and the alarm device can be provided on the side of the conveying device through a bracket; the acceleration sensor 400 is electrically connected to the control system; the control system is also connected to the alarm device and the display screen. It is ensured that the present invention can monitor the conveying condition of the conveying device, facilitate and timely discover abnormal conditions, and design an alarm device to give an alarm, thereby ensuring the safety of the present invention.

[0026] like Figure 4 , the control system includes a control logic; the control logic includes the following steps: 1) Collect vibration data; The original acceleration signal obtained by the sensor is collected in real time, with a sampling frequency of 1 kHz to 10 kHz. By monitoring the acceleration in real time, it is convenient to capture the operating details of the conveying device, which is conducive to subsequent analysis.

[0027] 2) Filter the vibration data; filter it through a low-pass filter to remove high-frequency noise and irrelevant signals; reduce the noise impact of the collected data and improve the accuracy and stability of the analysis.

[0028] 3) Obtaining a time-domain acceleration signal with a large amplitude; Use the sliding time window to obtain a time domain acceleration signal with a large amplitude; including: setting a window size of 2-5 seconds, and sliding the window on the processed acceleration signal. Whenever the window slides, calculate the root mean square value of the acceleration signal in the window; and set the index threshold, compare the calculated root mean square value with the index threshold, and if the root mean square value is greater than the index threshold, extract the acceleration signal of the 5-second time period before and after the window as the time domain acceleration signal with a large amplitude. Intercept the time domain acceleration signal, reduce the data for calculation and analysis, ensure fast calculation speed, ensure timely detection of faults, and respond to adjustment and processing.

[0029] 4) Use Fast Fourier Transform (FFT) to convert the time domain acceleration signal to the frequency domain signal; the Fast Fourier Transform (FFT) output usually includes complex values ​​corresponding to different frequencies.

[0030] 5) Calculate the amplitude spectrum and draw the frequency domain amplitude diagram; The output of the Fast Fourier Transform (FFT) is in complex form (including real and imaginary parts), and the amplitude spectrum is the complex modulus value of each frequency point. Therefore, the absolute value of the Fast Fourier Transform (FFT) output is taken as the amplitude of the frequency domain signal; Match the amplitude value in the frequency domain with the corresponding frequency axis and draw a spectrum. The horizontal axis is the frequency (in Hz) and the vertical axis is the amplitude. Use Matplotlib (Python) or other graphics libraries to draw the spectrum and display it on the display screen; the display screen can display the spectrum of different acceleration sensors, which is convenient for observing the spectrum through the display screen to understand the transportation status of the conveyor. At the same time, the faults generated and the basic scope of the faults can also be analyzed and checked based on the spectrum.

[0031] 6) Analyze the frequency domain amplitude diagram; 61) Set a threshold to determine whether an abnormality exists; find the peak point in the spectrum graph that is greater than the threshold. If there is a peak point greater than the threshold, it is determined that an abnormality exists; otherwise, there is no abnormality; 62) Use classification algorithms to train models; The spectrum diagram of different frequency components is used as input, and the classification algorithm model is trained to identify different signal patterns. The classification algorithms include SVM, neural network, decision tree, etc.; the signal patterns include common signal patterns of different fault types such as resonance phenomenon, shaft imbalance, gear failure, bearing failure, etc.; the training and optimization of the classification algorithm belong to the prior art, and the present invention only uses this technology and does not make any innovations in the training and optimization of the classification algorithm, so it will not be elaborated.

[0032] 63) Determine the cause of the abnormality; The spectrum graph judged as abnormal in 61) is input into the trained model to identify the signal pattern and determine the fault type.

[0033] 7) Determine if it is a resonance phenomenon and automatically adjust the speed; If the fault type is determined to be a resonance phenomenon, the control system sends a deceleration instruction to control the speed of the drive motor to decelerate by 90%-95%. The present invention automatically reduces the speed to avoid the resonance frequency, avoids the strong vibration caused by the resonance to cause a fault, affects the life of the conveying device, prevents the pallet from being unbalanced or offset due to vibration during transportation, and avoids vibration affecting the assembly quality. The present invention can ensure the smooth operation of the system, improve the overall conveying efficiency, and reduce downtime by controlling and avoiding the resonance phenomenon.

[0034] 8) If it is determined to be other types of faults that are not resonant phenomena, the control system sends an alarm command to the alarm device, and controls the alarm device to alarm. Through the alarm, it is ensured that the production line fault is discovered in time and can be checked in time. Engineers can observe the spectrum diagram on the display screen to check the cause of the fault and deal with it in time to prevent the production line from being paralyzed and the system from being unbalanced, resulting in low yield.

[0035] An assembly method of a motor transmission assembly system, comprising: S1: Pre-installation preparation of gear sets; press-fit 4 sets of gear sets for use; ensure good fit between gears to avoid noise and jamming.

[0036] S2: box cover is put on line; Manually put the box cover on the box cover cache line; place the box cover on the tray on the box cover cache line; the box cover cache line transports the box cover to the heating equipment, and the robot grabs the box cover to the heating equipment for heating until the heating is completed; ensure that the rear cover is evenly heated to the required temperature so that it is easier to fit during installation and convenient to install.

[0037] S3: initial cabinet assembly; When the case cover is put on the line, the case of the transmission is blown off at the front end of the assembly conveyor line to remove dust, impurities, oil stains, etc. on the surface of the parts or in the assembly environment to ensure the cleanliness of the assembly parts and improve the assembly quality. Reduce friction and wear caused by impurities, extend the service life of mechanical parts, and reduce the failure rate.

[0038] The pallet carries the box to the first support box assembly section. The first support box assembly section is equipped with a limit device. The limit device stops the pallet, manually brushes oil on the bearing chamber in the box, and uses a bearing press to press the bearing. This ensures that the product has excellent lubrication performance, the quality of the finished product, and the assembly operation is simple and convenient.

[0039] After using a dust blowing device to blow dust off the spare gear set assembled in S1, install the gear set into the box; ensure the cleanliness of the gear set, avoid wear and corrosion caused by dust, and ensure the life of the product.

[0040] After the gear set is installed, the limit device is started, the pallet is released, and the assembly conveyor line conveys the pallet to the second support box assembly section. Ensure the flexibility of the production line, ensure that the assembly is carried out in a limited position, and avoid confusion in the production line.

[0041] S4: Later cabinet assembly; First, glue is applied to the fixed end surface of the box using a glue coating device; Next, use the truss manipulator to grab the box cover and bring it to the assembly conveyor line to assemble the box cover; Then, use the upper cover pressing device to press the box cover. After the pressing is completed, turn to the automatic screw machine to assemble the bolts or screws; Finally, use a turning machine to flip the transmission 180° to the back, transport it to the oil seal air press, and use the oil seal air press to press the oil seal.

[0042] Through automated assembly, production efficiency is improved, human intervention is reduced, and the stability and quality control of the production process are improved. Through the application of automated equipment, human errors in production can be effectively reduced, labor costs can be reduced, and production accuracy and consistency can be improved, ultimately improving the overall quality of the product and the operating efficiency of the production line.

[0043] S5: box test; The assembled transmission is released to the box test section, and the performance detection device is used to test the air tightness of the assembled transmission; the transmission with poor air tightness is removed for rework or scrap treatment, and the transmission with good air tightness is manually oiled. After the oiling is completed, the transmission is transferred to the elevator, and then transferred to the next step of motor assembly. After assembly, the box is inspected to ensure the good product rate of the transmission product and the good lubrication performance inside the transmission.

[0044] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. A motor transmission assembly system, characterized in that: Including assembly conveyor line, box cover buffer line and assembly equipment; The assembly conveyor line and the box cover buffer line are conveying paths formed by conveying devices; the assembly equipment is arranged on the assembly conveyor line and the box cover buffer line; The conveying device includes a conveyor, a pallet and a control system; the conveyor includes a support frame and a transmission conveying member, the transmission conveying member is installed on the support frame, and a limit device for limiting the stop or release of the pallet is also installed on the support frame; rollers are installed on the lower surface of the four corners of the pallet, and the outer side of the rollers exposes the edge of the pallet; The conveying device is also provided with an acceleration sensor, a display screen and an alarm device; the control system is electrically connected to the conveyor, the acceleration sensor, the display screen and the alarm device.

2. The motor transmission assembly system according to claim 1, characterized in that: The support frame includes a support leg and a support box, the support leg is fixed to the bottom of the support box, the transmission transport member includes a driving motor, a driving wheel group, a driven wheel group and a transmission assembly; the driving wheel group includes a first rotating shaft, a first wheel body and a connecting shaft, the first wheel body is fixed at both ends of the first rotating shaft, the connecting shaft is fixed on the outside of the first wheel body, the first rotating shaft, the wheel body and the connecting shaft are concentrically arranged, and the connecting shaft is connected to the output shaft of the driving motor; the driven wheel group includes a second rotating shaft and a second wheel body; the second wheel body is respectively fixed at both ends of the second rotating shaft; the first rotating shaft and the second rotating shaft or two adjacent second rotating shafts are connected by the transmission assembly; the transmission assembly includes a pulley and a conveyor belt, the pulley is installed on the first rotating shaft or the second rotating shaft; the transmission belt connects the pulleys on the adjacent first rotating shaft or the second rotating shaft; the control system is electrically connected to the driving motor.

3. The motor transmission assembly system according to claim 2, characterized in that: A plurality of acceleration sensors are provided. An acceleration sensor is provided on the bearing seat of the first rotating shaft, and acceleration sensors are provided on the bearing seats closest to the limiting device at the front side of the limiting device.

4. The motor transmission assembly system according to claim 2, characterized in that: An opening is provided at the top of the support box at a position corresponding to the first wheel body or the second wheel body, and the upper parts of the first wheel body and the second wheel body are exposed from the upper surface of the support box; Baffles are fixed on both sides of the upper surface of the support box, and the baffles are arranged along the length direction of the support box; the tray is arranged above the support box, and the rollers are attached to the baffles on both sides of the support box; The limiting device is also installed in the support box, and a rectangular opening is provided on the support box corresponding to the position of the limiting device; the upper part of the limiting device is exposed from the upper surface of the support box through the rectangular opening to limit the pallet.

5. The motor transmission assembly system according to claim 1, characterized in that: The assembly equipment includes a truss manipulator, a heating device, a dust blowing device, a bearing press, a glue coating device, a top cover press, an automatic screw machine, an oil seal air press, a performance testing device and a lift; The heating device is arranged near the end of the box cover cache line, and a manipulator is also arranged at the heating device to grab the box cover; the assembly conveyor line includes a first support box assembly section, a second support box assembly section, and a box body testing section; The first support box assembly section is provided with a dust blowing device and a bearing press, and the second support box assembly section is provided with the gluing device, the upper cover press, the automatic screw machine, and the oil seal air press in sequence from front to back; a turning machine is also provided between the automatic screw machine and the oil seal air press; the end of the box cover cache line is located in front of the upper cover press, and a truss manipulator is provided at the end of the box cover cache line; the box body testing section is provided with the performance detection device; and the elevator is provided at the end of the assembly conveyor line.

6. The motor transmission assembly system according to claim 5, characterized in that: The assembly conveyor line and the box cover cache line are arranged in parallel, the front end of the box cover cache line is flush with the front end of the assembly conveyor line, and the end of the box cover cache line is arranged close to the upper cover pressing device.

7. The motor transmission assembly system according to claim 1, characterized in that: The control system includes a control logic; the control logic includes the following steps: 1) Collect vibration data; Collect the original acceleration signal obtained by the sensor in real time; 2) Filter the vibration data; filter it through a low-pass filter to remove high-frequency noise and irrelevant signals; 3) Obtaining a time-domain acceleration signal with a large amplitude; Use the time window sliding method to obtain a time domain acceleration signal with a large amplitude; 4) Use fast Fourier transform to convert the time domain acceleration signal into frequency domain signal; 5) Calculate the amplitude spectrum and draw the frequency domain amplitude diagram; Take the absolute value of the fast Fourier transform output as the amplitude of the frequency domain signal, correspond the amplitude value of the frequency domain to the corresponding frequency axis, draw a spectrum diagram, and display the spectrum diagram on the display screen; 6) Analyze the frequency domain amplitude diagram; 61) Set a threshold to determine whether an abnormality exists; find the peak point in the spectrum graph that is greater than the threshold. If there is a peak point greater than the threshold, it is determined that an abnormality exists; otherwise, there is no abnormality; 62) Use classification algorithms to train models; The spectrograms of different frequency components are used as input to train the classification algorithm model to identify different signal patterns; 63) Determine the cause of the abnormality; Input the spectrum graph judged to be abnormal in 61) into the trained model to identify the signal pattern and determine the fault type; 7) Determine if it is a resonance phenomenon and automatically adjust the speed; If the fault type is determined to be resonance, the control system sends a deceleration command to control the speed of the drive motor to decelerate by 90%-95%; 8) If it is determined to be other fault types that are non-resonance phenomena, the control system sends an alarm instruction to the alarm device to control the alarm device to alarm.

8. The motor transmission assembly system according to claim 7, characterized in that: The classification algorithms include SVM, neural network, and decision tree; the signal patterns include signal patterns of different fault types such as resonance phenomenon, shaft imbalance, gear fault, and bearing fault.

9. The motor transmission assembly system according to claim 7, characterized in that: Step 3) specifically includes: setting a window size of 2-5 seconds, sliding the window on the processed acceleration signal, and calculating the root mean square value of the acceleration signal in the window each time the window slides; setting an index threshold, comparing the calculated root mean square value with the index threshold, and if the root mean square value is greater than the index threshold, extracting the acceleration signal of the 5-second time period before and after the window as the time domain acceleration signal with a larger amplitude.

10. An assembly method of a motor transmission assembly system according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Gear set pre-assembly preparation; S2: box cover is put on line; Manually put the box cover on the box cover cache line; place the box cover on the tray on the box cover cache line; the box cover cache line transports the box cover to the heating equipment, and the robot grabs the box cover to the heating equipment for heating until the heating is completed; S3: initial cabinet assembly; When the case cover is put on line, the case of the transmission is blown off dust at the front end of the assembly conveyor line; The pallet carries the box to the first support box assembly section, where a limit device is provided. The limit device stops the pallet, and the bearing chamber in the box is manually oiled, and the bearing is press-fitted using a bearing press machine. After using a dust blowing device to blow dust off the spare gear set assembled in S1, install the gear set into the box; After the gear set is installed, the limit device is started, the pallet is released, and the assembly conveyor line conveys the pallet to the second support box assembly section; S4: Later cabinet assembly; First, glue is applied to the fixed end surface of the box using a glue coating device; Next, use the truss manipulator to grab the box cover and bring it to the assembly conveyor line to assemble the box cover; Then, use the upper cover pressing device to press the box cover. After the pressing is completed, turn to the automatic screw machine to assemble the bolts or screws; Finally, the transmission is turned 180° by a turning machine and transported to the oil seal air press, where the oil seal is pressed and installed; S5: box test; The assembled transmission is released to the box test section, and the air tightness test is carried out on the assembled transmission using a performance detection device; transmissions with poor air tightness are removed, and transmissions with good air tightness are manually oiled. After the oiling is completed, the transmission is transferred to the elevator, and then transferred to the next step of motor assembly.

Images