A dual-motor controlled fastening device with torque recognition
By using a dual-motor control mechanism to identify and switch the torque of the fastening equipment, the problems of torque storage errors and motor failures in traditional torque guns are solved, enabling accurate torque identification and correction, and improving the reliability and production efficiency of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGXI AISHENG CHUANGZHI SCI & TECH CO LTD
- Filing Date
- 2023-07-17
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional torque guns are prone to problems such as incorrect input of torque storage values and failure to function properly when the drive motor malfunctions, resulting in improper torque setting that cannot be identified or corrected.
The fastening equipment is controlled by a dual motor with torque recognition. It utilizes a PLC, torque storage module, torque detection device, comparator and dual drive motors. The PLC outputs a torque signal to control the motor operation and switches to the backup motor when the torque is abnormal. Combined with a buzzer to indicate the abnormality, the equipment realizes torque recognition and correction.
It improved the reliability and intelligence of the equipment, reduced the investment in spare guns, lowered production costs, and increased equipment utilization efficiency.
Smart Images
Figure CN116909329B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of signal processing technology, and in particular to a dual-motor controlled fastening device with torque recognition. Background Technology
[0002] During the assembly or testing of mechanical equipment, critical assembly positions require specific torque values. For example, in the workstation for assembling the steering column in an automotive instrument cluster, a specific torque is required to install and tighten the steering column bolts. Currently, traditional torque guns use torque storage devices and a single drive motor to achieve torque recognition, but there are still some shortcomings: 1) There is a certain probability of inputting incorrect torque values during use, leading to improper torque setting. When an incorrect torque value is used for tightening, the system cannot recognize and correct it; 2) When the drive motor malfunctions or fails, there is no backup motor, and the equipment cannot operate. Summary of the Invention
[0003] This invention proposes a dual-motor controlled fastening device with torque recognition, which includes a PLC, a torque storage module, a torque detection device, a comparator, a first drive motor, and a second drive motor.
[0004] The PLC outputs torque signals and controls the start and stop of the first and second drive motors;
[0005] The torque storage module is connected to the PLC at its input end and to the first drive motor and the second drive motor at its output end, and is used to output torque values to the first drive motor or the second drive motor according to the torque signal output by the PLC.
[0006] The torque detection device is connected to the first drive motor and the second drive motor, and is used to obtain the motor torque value;
[0007] The comparator is connected to the torque detection device and the torque storage module, and is used to compare the motor torque value with the torque signal output by the PLC;
[0008] The torque signal output by the PLC controls the first drive motor to control the torque output of the torque gun. When the comparator finds that the output torque of the first drive motor is abnormal, the PLC controls the first drive motor to reverse to eliminate the abnormal torque and starts the second drive motor to continue working.
[0009] Furthermore, the dual-motor controlled fastening device with torque recognition includes a first current relay coil and a first current relay normally open contact;
[0010] The coil of the first current relay is connected to the output terminal of the PLC, and the normally open contact of the first current relay is connected to the first drive motor.
[0011] The PLC outputs an electrical signal to energize the coil of the first current relay, causing the normally open contact of the first current relay to close, and the first drive motor circuit to be turned on.
[0012] Furthermore, the dual-motor controlled fastening device with torque recognition includes a first time-delay relay coil, a first normally open contact of the first time-delay relay, a second current relay coil, and a first normally open contact of the second current relay.
[0013] The first time-delay relay coil is connected in parallel with the first current relay coil. The first normally open contact of the first time-delay relay is connected to the input terminal of the PLC. The second current relay coil is connected to the output terminal of the PLC. The first normally open contact of the second current relay is located between the comparator and the input terminal of the PLC.
[0014] When the first current relay coil is energized, the first time delay relay coil is also energized, and the first normally open contact of the first time delay relay is turned on. When the PLC receives the signal from the first normally open contact of the first time delay relay, it controls the second current relay coil to be energized. When the first normally open contact of the second current relay is turned on, the comparator data is input into the PLC.
[0015] Furthermore, the dual-motor controlled fastening device with torque recognition includes a first current relay with a second normally closed contact, a third current relay, and a third current relay with a first normally open contact.
[0016] The third current relay is connected to the output terminal of the PLC, the second normally closed contact of the first current relay is connected to the third current relay, and the first normally open contact of the third current relay is connected to the first drive motor.
[0017] The PLC stops supplying power to the coil 5 of the first current relay, the second normally closed contact of the first current relay closes, the PLC output terminal powers the third current relay, the first normally open contact of the third current relay closes, and the first drive motor reverses, thereby eliminating abnormal torque.
[0018] Furthermore, the dual-motor controlled fastening device with torque recognition includes a second time-delay relay coil, a first normally open contact of the second time-delay relay, a fourth current relay coil, a third time-delay relay coil, a first normally open contact of the third time-delay relay, and a first normally open contact of the fourth current relay;
[0019] The second time-delay relay coil is connected in parallel with the third current relay. The first normally open contact of the second time-delay relay is connected to the input terminal of the PLC. The fourth current relay coil is connected to the output terminal of the PLC. The third time-delay relay coil is connected to the fourth current relay coil. The first normally open contact of the third time-delay relay is connected in parallel with the fourth current relay coil and the third time-delay relay coil. The first normally open contact of the fourth current relay is connected to the second drive motor.
[0020] When the second time-delay relay coil is energized, the first normally open contact of the second time-delay relay is closed. After the PLC receives the signal from the first normally open contact of the second time-delay relay, the fourth current relay coil and the third time-delay relay coil are energized, and the first normally open contact of the third time-delay relay is closed. When the first normally open contact of the fourth current relay is closed, the second drive motor rotates.
[0021] Furthermore, the dual-motor controlled fastening device with torque recognition includes a buzzer connected in series with the first normally open contact of the third time-delay relay. The buzzer emits a buzzing alert after the first drive motor reverses to eliminate abnormal torque.
[0022] Furthermore, the dual-motor controlled fastening device with torque recognition includes a signal amplifier disposed between the comparator and the torque detection device, for amplifying the torque signal detected by the torque detection device.
[0023] Furthermore, the dual-motor controlled fastening device with torque recognition includes a signal transmitter disposed between the comparator and the PLC input terminal, the signal transmitter being used to transmit the comparison result to the PLC.
[0024] The beneficial effects of this application are:
[0025] This invention uses a PLC to control the torque gun circuit, and a torque detector detects and confirms the torque output value, enabling the system to identify and correct the torque, increasing equipment reliability and enhancing equipment intelligence.
[0026] This invention uses a dual-motor control fastening device with torque recognition. The dual-drive motor mode can reduce the investment of spare guns, save production costs, and improve equipment utilization efficiency. Attached Figure Description
[0027] Figure 1 This is a structural schematic diagram of a dual-motor controlled fastening device with torque recognition proposed in an embodiment of the present invention;
[0028] Figure 2This is a flowchart illustrating the operation of a dual-motor controlled fastening device with torque recognition in an embodiment of the present invention.
[0029] 1-Start switch; 2-PLC2; 3-Torque storage module; 4-First drive motor; 5-First current relay coil; 6-First current relay normally open contact; 7-Torque detection device; 8-First current relay second normally closed contact; 9-First time delay relay coil; 10-First time delay relay first normally open contact; 11-Second current relay coil; 12-Second current relay first normally open contact; 13-Signal amplifier; 14-Comparator; 15-Signal transmitter; 16-Third current relay coil; 17-Third current relay first normally open contact; 18-Second time delay relay coil; 19-Second time delay relay first normally open contact; 20-Fourth current relay coil; 21-Third time delay relay coil; 22-Third time delay relay first normally open contact; 23-Buzzer; 24-Fourth current relay first normally open contact; 25-Second drive motor. Detailed Implementation
[0030] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.
[0031] In the following description, many specific details are set forth in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.
[0032] As attached Figure 1 As shown, the present invention designs a dual-motor controlled fastening device with torque recognition. The dual-motor controlled fastening device with torque recognition includes: PLC2, torque storage module3, torque detection device7, comparator14, first drive motor4 and second drive motor25.
[0033] The input ports of PLC2 are connected to the output terminals of the start switch 1, the first normally open contact 10 of the first time delay relay, the first normally open contact 19 of the second time delay relay, and the signal transmitter 15, respectively; the input terminals of the start switch 1, the first normally open contact 10 of the first time delay relay, the first normally open contact 19 of the second time delay relay, and the signal transmitter 15 are connected to the positive terminal of the DC power supply.
[0034] The output ports of PLC2 are connected to the input terminals of the fourth current relay coil 20, the third current relay coil 16, the second current relay coil 11, and the first current relay coil 5, respectively. The output terminal of the fourth current relay coil 20 is connected to the input terminal of the third time-delay relay coil 21. The buzzer 23 and the first normally open contact 22 of the third time-delay relay, connected in series, are connected in parallel with the fourth current relay coil 20 and the third time-delay relay coil 21. The output terminal of the third current relay coil 16 is connected to the input terminal of the second normally closed contact 8 of the first current relay. The second time-delay relay coil 18 is connected in parallel with the third current relay coil 16. The first current relay coil 5 is connected in parallel with the first time-delay relay coil 9. The output terminals of the third time-delay relay coil 21, the second normally closed contact 8 of the first current relay, the second current relay coil 11, and the first current relay coil 5 are connected to the negative terminal of the DC power supply.
[0035] The torque storage module 3 is connected to the PLC2 and is used to output torque values to the first drive motor 4 or the second drive motor 25 according to the torque signal output by the PLC2.
[0036] The first drive motor 4 and the second drive motor 25 send their motor torque values to the torque detection device 7 via CAN or LIN communication for torque detection.
[0037] The output terminal of the first drive motor 4 is connected to the input terminal of the normally open contact 6 of the first current relay and the first normally open contact 17 of the third current relay. The output terminals of the normally open contact 6 of the first current relay and the first normally open contact 17 of the third current relay are connected to the negative terminal of the DC power supply.
[0038] The output terminal of the second drive motor 25 is connected to the input terminal of the first normally open contact 24 of the fourth current relay, and the output terminal of the first normally open contact 24 of the fourth current relay is connected to the negative terminal of the DC power supply.
[0039] The signal amplifier 13 is connected to the torque detection device 7 and is used to amplify the torque value input by the torque detection device 7.
[0040] Signal amplifier 13 is connected to comparator 14 to amplify the motor torque value.
[0041] Comparator 14 is connected to signal transmitter 15 and is used to transmit signals to signal transmitter 15 via CAN or LIN communication. Then, signal transmitter 15 transmits the torque value signal to PLC 2.
[0042] The working principle of this invention is as follows:
[0043] When the start switch 1 is pressed, PLC 2 receives the signal from start switch 1 and outputs a signal to torque storage module 3. Torque storage module 3 transmits the torque value and operation signal to the first drive motor 4. At the same time, PLC 2 outputs an electrical signal to energize the coil 5 of the first current relay, and the normally open contact 6 of the first current relay closes, controlling the first drive motor 4 to rotate forward. The first drive motor 4 sends the torque value of the first drive motor to the torque detection device 7 for torque detection via CAN or LIN communication. At the same time, the second normally closed contact 8 of the first current relay opens, realizing the forward and reverse interlock of the first drive motor.
[0044] Torque Detection: Simultaneously with the energization of the first current relay coil 5, the first time-delay relay coil 9 is energized. After the delay time, the first normally open contact 10 of the first time-delay relay closes. At this time, PLC 2 receives the signal from the first normally open contact 10 of the first time-delay relay. PLC 2 then outputs a signal to energize the second current relay coil 11, causing the first normally open contact 12 of the second current relay to close. This energizes the torque detection circuit. The torque value of the first drive motor acquired by the torque detection device 7 is amplified by the signal amplifier 13 and then compared with the torque value input to the torque storage module 3 by the comparator 14. The comparator 14 transmits the signal to the signal transmitter 15 via CAN or LIN communication, and the signal transmitter 15 then transmits the torque value signal to PLC 2. If the torque value is within the acceptable range, the system continues to operate and execute the above functions.
[0045] 3) First motor reverses to eliminate abnormality: If the torque value is abnormal after comparison by comparator 14, comparator 14 transmits the abnormal signal to signal transmitter 15 via CAN or LIN communication. At this time, after receiving the signal from signal transmitter 15, PLC 2 stops supplying power to the first current relay coil 5 at its output terminal, the normally open contact 6 of the first current relay opens, and the second normally closed contact 8 of the first current relay closes. At the same time, PLC 2 output terminal powers the third current relay 16, the first normally open contact 17 of the third current relay closes, and the first drive motor 4 reverses, thus eliminating the abnormal torque.
[0046] 4) Operation of the Second Drive Motor: Simultaneously with the energization of the third current relay 16, the coil 18 of the second time-delay relay is also energized. After the delay time, the first normally open contact switch 19 of the second time-delay relay closes. Upon receiving the signal from the first normally open contact switch 19 of the second time-delay relay, PLC 2 outputs power to the coil 20 of the fourth current relay. Simultaneously, the coil 21 of the third time-delay relay is energized. After the delay time, the first normally open contact 22 of the third time-delay relay closes, and the buzzer 23 sounds to indicate a torque abnormality. Upon receiving the abnormality indication, the operator manually inputs the torque value to PLC 2. PLC 2 receives the manually input torque and transmits the signal to the torque storage module 3. The torque storage module transmits the torque value and operating signal to the second drive motor 25. Simultaneously, the first normally open contact 24 of the fourth current relay closes, controlling the rotation of the second drive motor 25. The second drive motor sends its torque value to the torque detection device 7 for monitoring via CAN or LIN communication.
[0047] After the torque gun start switch is pressed, PLC2 will transmit the torque value set by the torque storage module to the first drive motor. The first drive motor will run and output the specified torque. The torque detector will detect the torque value, and a comparator will determine whether the torque is qualified. If qualified, the first drive motor will rotate forward until the end; if unqualified, after receiving the torque abnormality signal, PLC2 will send a reverse signal to the first motor to eliminate the torque abnormality, and at the same time instruct the buzzer to issue an abnormality warning.
[0048] After hearing the abnormality prompt, the operator manually inputs the acceptable torque, runs the second drive motor to output the specified torque, and the torque detector detects the torque value. A comparator then determines whether the torque is acceptable. If acceptable, the second drive motor rotates forward until the end; if unacceptable, the PLC2 receives the torque abnormality signal and instructs the buzzer to sound an abnormality prompt. The operator then manually inputs the acceptable torque again following the above procedure.
[0049] When the first drive motor malfunctions or fails, the PLC2 receives the abnormal signal and the buzzer sounds an abnormal warning. The operator manually inputs the torque to directly drive the second motor. The torque detector reads the torque value, and a comparator determines if the torque is within acceptable limits. If acceptable, the second drive motor rotates forward until the end, thus allowing the second motor to continue operating as a backup.
[0050] Although this application has been disclosed in detail with reference to the accompanying drawings, it should be understood that these descriptions are merely exemplary and not intended to limit the application of this application. The scope of protection of this application is defined by the appended claims and may include various variations, modifications, and equivalents of the invention without departing from the scope and spirit of this application.
Claims
1. A dual motor controlled fastening apparatus with torque recognition, characterized by, The dual-motor controlled fastening device with torque recognition includes a PLC (2), a torque storage module (3), a torque detection device (7), a comparator (14), a first drive motor (4), and a second drive motor (25). The PLC (2) outputs torque signals and controls the start and stop of the first drive motor (4) and the second drive motor (25); The torque storage module (3) has its input end connected to the PLC (2) and its output end connected to the first drive motor (4) and the second drive motor (25), and is used to output torque values to the first drive motor (4) or the second drive motor (25) according to the torque signal output by the PLC (2). The torque detection device (7) is connected to the first drive motor (4) and the second drive motor (25) to obtain the motor torque value; The comparator (14) is connected to the torque detection device (7) and the torque storage module (3) and is used to compare the motor torque value with the torque signal output by the PLC (2); The torque signal output by the PLC (2) controls the first drive motor (4) to control the torque output of the torque gun. When the comparator (14) compares and finds that the output torque of the first drive motor (4) is abnormal, the PLC (2) controls the first drive motor (4) to reverse to eliminate the abnormal torque and starts the second drive motor (25) to continue working. The dual-motor controlled fastening device with torque recognition includes a first current relay coil (5) and a first current relay normally open contact (6). The first current relay coil (5) is connected to the output terminal of the PLC (2), and the normally open contact (6) of the first current relay is connected to the first drive motor (4); The PLC (2) outputs an electrical signal to energize the coil (5) of the first current relay, causing the normally open contact (6) of the first current relay to close, and the circuit of the first drive motor (4) to be turned on. The dual-motor controlled fastening device with torque recognition includes a first time delay relay coil (9), a first normally open contact (10) of the first time delay relay, a second current relay coil (11), and a first normally open contact (12) of the second current relay. The first time delay relay coil (9) is connected in parallel with the first current relay coil (5), the first normally open contact (10) of the first time delay relay is connected to the input terminal of the PLC (2), the second current relay coil (11) is connected to the output terminal of the PLC (2), and the first normally open contact (12) of the second current relay is located between the comparator (14) and the input terminal of the PLC (2). When the first current relay coil (5) is energized, the first time delay relay coil (9) is also energized. The first normally open contact (10) of the first time delay relay is turned on. The PLC (2) receives the signal from the first normally open contact (10) of the first time delay relay and controls the second current relay coil (11) to be energized. The first normally open contact (12) of the second current relay is turned on so that the data of the comparator (14) is input into the PLC (2).
2. The dual motor controlled fastening apparatus with torque recognition of claim 1, wherein, The dual-motor controlled fastening device with torque recognition includes a first current relay second normally closed contact (8), a third current relay (16), and a third current relay first normally open contact (17). The third current relay (16) is connected to the output terminal of the PLC (2), the second normally closed contact (8) of the first current relay is connected to the third current relay (16), and the first normally open contact (17) of the third current relay is connected to the first drive motor (4). The PLC (2) stops supplying power to the coil 5 of the first current relay, the second normally closed contact (8) of the first current relay closes, the output terminal of the PLC (2) powers the third current relay (16), the first normally open contact (17) of the third current relay closes, and the first drive motor (4) reverses, thereby eliminating the abnormal torque.
3. The dual motor controlled fastening apparatus with torque recognition of claim 2, wherein, The dual-motor controlled fastening device with torque recognition includes a second time-delay relay coil (18), a first normally open contact of the second time-delay relay (19), a fourth current relay coil (20), a third time-delay relay coil (21), a first normally open contact of the third time-delay relay (22), and a first normally open contact of the fourth current relay (24). The second time-delay relay coil (18) is connected in parallel with the third current relay (16), the first normally open contact (19) of the second time-delay relay is connected to the input terminal of the PLC (2), the fourth current relay coil (20) is connected to the output terminal of the PLC (2), the third time-delay relay coil (21) is connected to the fourth current relay coil (20), the first normally open contact (22) of the third time-delay relay is connected in parallel with the fourth current relay coil (20) and the third time-delay relay coil (21), and the first normally open contact (24) of the fourth current relay is connected to the second drive motor (25). When the second time-delay relay coil (18) is energized, the first normally open contact (19) of the second time-delay relay is closed. After the PLC (2) receives the signal from the first normally open contact (19) of the second time-delay relay, the fourth current relay coil (20) and the third time-delay relay coil (21) are energized, and the first normally open contact (22) of the third time-delay relay is closed. The first normally open contact (24) of the fourth current relay is closed, causing the second drive motor (25) to rotate.
4. The dual motor controlled fastening apparatus with torque recognition of claim 3, wherein, The dual-motor control fastening device with torque recognition includes a buzzer (23), which is connected in series with the first normally open contact (22) of the third time delay relay. The buzzer (23) emits a buzzing prompt after the first drive motor (4) reverses to eliminate abnormal torque.
5. The dual motor controlled fastening apparatus with torque recognition of claim 1, wherein, The dual-motor controlled fastening device with torque recognition includes a signal amplifier (13), which is located between the comparator (14) and the torque detection device (7) to amplify the torque signal detected by the torque detection device (7).
6. The dual motor controlled fastening apparatus with torque recognition of claim 1, wherein, The dual-motor controlled fastening device with torque recognition includes a signal transmitter (15) which is disposed between the comparator (14) and the input terminal of the PLC (2). The signal transmitter (15) is used to transmit the comparison result to the PLC (2).