An automatic assembly machine for terminal block assemblies

Abstract

This invention relates to an automatic assembly machine for terminal block assemblies, comprising a conveying device, a first feeding device, a second feeding device, a third feeding device, a fourth feeding device, and a discharging device. The conveying device is provided with several first mounting seats for the assembly. The first, second, third, and fourth feeding devices respectively feed the terminal block, terminal screw, clamp, and terminal piece into the first mounting seats. The second feeding device is equipped with a screw-tightening mechanism. This invention provides an automatic assembly machine for terminal block assemblies.

Description

Technical Field

[0001] This invention relates to the field of electrical component technology, and more specifically, to an automatic assembly machine for terminal block assemblies. Background Technology

[0002] A terminal block assembly is a wiring structure used in electrical equipment such as circuit breakers or residual current devices. Its structure typically includes a terminal block with a square frame, a terminal screw with a washer that screws into the terminal block, a clamp inserted into the screw, and a terminal piece inserted into the terminal block below the terminal screw. Existing terminal blocks are usually installed manually by workers, which is very cumbersome and inefficient. Summary of the Invention

[0003] In summary, to overcome the shortcomings of the prior art, the present invention provides an automatic assembly machine for terminal block assemblies.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an automatic assembly machine for terminal block assemblies, comprising a conveying device, a first feeding device, a second feeding device, a third feeding device, a fourth feeding device, and a discharging device. The conveying device is provided with a plurality of first mounting seats for the assembly. The first feeding device, the second feeding device, the third feeding device, and the fourth feeding device respectively feed the terminal block, the terminal screw, the clamp, and the terminal piece into the first mounting seat. The second feeding device is provided with a screw tightening mechanism.

[0005] Furthermore, a screw loosening mechanism is provided between the second feeding device and the third feeding device.

[0006] Furthermore, a screw tightening mechanism is provided between the fourth feeding device and the unloading device.

[0007] Furthermore, the second feeding device is provided with an attractive magnet at the conveying position. The attractive magnet is an annular ring with an inner hole that matches the screwdriver of the screw tightening mechanism. The second feeding device is provided with a mounting hole at the top position of the attractive magnet.

[0008] Furthermore, the conveying device is a turntable, and there are two conveying devices. A material transfer mechanism is provided between the two conveying devices, and the material transfer mechanism transfers the terminal assembly from one conveying device to the other conveying device.

[0009] Furthermore, the material transfer mechanism includes a material transfer frame and a first material transfer robot, the material transfer frame being provided with at least one transfer seat, and the number of the first material transfer robot is one more than the number of the transfer seats.

[0010] Furthermore, a waste discharge mechanism is provided between the third feeding device and the fourth feeding device. The waste discharge mechanism includes a waste discharge component, a waste discharge bucket, and a sensor.

[0011] Furthermore, the waste discharge component is a robotic arm, and the sensor is located at the claw of the waste discharge component.

[0012] Furthermore, the fourth feeding device includes a first feeding mechanism, a second feeding mechanism, a conveying mechanism, and a inserting robot. The conveying mechanism is equipped with several second mounting seats. The first feeding mechanism and the second feeding mechanism respectively feed the stationary contact piece and the contact point into the second mounting seat. The inserting robot inserts the wiring piece installed in the second mounting seat into the first mounting seat.

[0013] Furthermore, the fourth feeding device also includes a linear feeder and a second transfer robot. The linear feeder is positioned facing the insert robot, and the second transfer robot moves the connector piece installed in the second mounting base into the linear feeder.

[0014] The beneficial effects of this application are as follows: When the equipment is operating, the first feeding device will first place the terminal block into the slot on the first mounting base. Then, the conveying device will move the first mounting base to the next station. The second feeding device will place the terminal screw on the terminal block, and then the screw-tightening mechanism will screw the screw in. After that, the conveying device will move to the next station. The third feeding device will insert the clamp and continue to move. The fourth feeding device will insert the terminal piece. Finally, it will move to the unloading device to unload the parts. The entire process is automatic assembly without manual installation, which is highly efficient and precise. Each feeding device can be composed of a vibratory feeder, a feeder, a mounting frame adapted to the shape of various parts, and a robot. The vibratory feeder vibrates various parts onto the feeder, which then transports them to the mounting frame position. The robot then moves them to the slot on the first mounting base. The robot can be inserted vertically from the top or horizontally from the side. The feeder can be of various forms, such as linear vibration type or cylinder blowing type. The screw-tightening mechanism can be composed of a motor, screwdriver, and telescopic mechanism. The telescopic mechanism can be a cylinder, hydraulic cylinder, or electric push rod. The unloading device can be just a robot. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the terminal block assembly according to an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the structure of an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the material transfer mechanism according to an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the structure of the first feeding device according to an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the structure of the second feeding device according to an embodiment of the present invention.

[0020] Figure 6 This is a schematic diagram of the conveying position of the second feeding device in an embodiment of the present invention.

[0021] Figure 7 This is a schematic diagram of the screw loosening mechanism according to an embodiment of the present invention.

[0022] Figure 8 This is a schematic diagram of the third feeding device according to an embodiment of the present invention.

[0023] Figure 9 This is a schematic diagram of the waste discharge mechanism according to an embodiment of the present invention.

[0024] Figure 10 This is a schematic diagram of the fourth feeding device according to an embodiment of the present invention.

[0025] Figure 11 This is a schematic diagram of the structure of the first feeding mechanism according to an embodiment of the present invention.

[0026] Figure 12 This is a schematic diagram of the structure of the second feeding mechanism according to an embodiment of the present invention.

[0027] Figure 13 This is a schematic diagram of the installation of the conveying device at the unloading device in an embodiment of the present invention.

[0028] Figure 14 This is a schematic diagram of the fifth feeding device according to an embodiment of the present invention.

[0029] Figure 15 This is a schematic diagram of the steering block according to an embodiment of the present invention.

[0030] Figure 16 This is a schematic diagram of the screw tightening mechanism according to an embodiment of the present invention.

[0031] Figure 17 This is a schematic diagram of the structure of the third mounting base according to an embodiment of the present invention.

[0032] Figure 18 This is an exploded view of the third mounting base according to an embodiment of the present invention.

[0033] The labels in the diagram have the following meanings: 1. Terminal assembly, 101. Terminal block, 102. Terminal screw, 103. Hoop, 104. Terminal piece, 1041. Stationary contact piece, 1042. Contact point, 105. Arc damper, 2. Conveying device, 201. First mounting base, 202. Transfer mechanism, 2021. Transfer rack, 20211. Transfer base, 2022. First transfer robot, 3. First feeding device, 4. Second feeding device, 401. Screw tightening mechanism, 402. Screw loosening mechanism, 403. Attraction magnet, 404. Mounting hole, 5. Third feeding device, 501. Waste discharge mechanism, 5011. Waste discharge assembly, 5012. Waste discharge bin, 5013. Sensor, 6. Fourth feeding device, 601. First feeding mechanism, 602. 603. Second feeding mechanism; 6031. Second mounting base; 604. Insertion robot; 605. Linear feeder; 606. Second material transfer robot; 7. Unloading device; 8. Tightening screw mechanism; 9. Fifth feeding device; 901. Third mounting base; 9011. Mounting groove; 9012. Connecting socket; 9013. Clamping component; 90131. Limiting block; 9014. Driving component; 9015. Sliding groove; 9016. Connecting block; 90161. Reset groove; 902. Vibratory feeder assembly; 903. Push plate assembly; 904. Steering wheel; 905. Steering block; 9051. Steering socket; 906. Feeding robot; 907. Stabilizing block; 908. Top plate mechanism; 9081. Telescopic component; 9082. Top rod. Detailed Implementation

[0034] This specific embodiment is merely an explanation of the present embodiment and is not intended to limit the present embodiment. After reading this specification, those skilled in the art can make modifications to the present embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present embodiment.

[0035] Referring to the accompanying drawings, the present invention provides the following technical solution: an automatic assembly machine for terminal block assemblies, comprising a conveying device 2, a first feeding device 3, a second feeding device 4, a third feeding device 5, a fourth feeding device 6, and a discharging device 7. The conveying device 2 is provided with a plurality of first mounting seats 201 for the assembly. The first feeding device 3, the second feeding device 4, the third feeding device 5, and the fourth feeding device 6 respectively feed the terminal block 101, the terminal screw 102, the clamp 103, and the terminal piece 104 into the first mounting seat 201. The second feeding device 4 is provided with a screw tightening mechanism 401.

[0036] With this setup, during equipment operation, the first feeding device 3 will first place the terminal block 101 into the slot on the first mounting base 201. Then, the conveying device 2 will move the first mounting base 201 to the next station, where the second feeding device 4 will place the wiring screw 102 onto the terminal block 101. The screw-tightening mechanism 401 will then tighten the screw. Afterward, the conveying device 2 will move to the next station, the third feeding device 5 will insert the clamp 103, and the equipment will continue moving. The fourth feeding device 6 will then insert the wiring piece 104. Finally, the equipment will move to the unloading device 7 to unload the components. The entire process is automated, requiring no manual installation, resulting in high efficiency. High precision. Each feeding device can be composed of a vibratory feeder, a feeder, a mounting frame adapted to the shape of various parts, and a robot. The vibratory feeder vibrates various parts onto the feeder, which then transports them to the mounting frame position. The robot then moves them to the slot on the first mounting seat 201. The robot can be inserted vertically from the top or horizontally from the side. The feeder can be of various forms, such as linear vibration type or cylinder blowing type. The screw tightening mechanism 401 can be composed of a motor, screwdriver, and telescopic mechanism. The telescopic mechanism can be a cylinder, hydraulic cylinder, or electric push rod. The unloading device 7 can be made up of only a robot.

[0037] In a preferred embodiment, a screw loosening mechanism 402 is provided between the second feeding device 4 and the third feeding device 5.

[0038] With this configuration, the screw loosening mechanism 402 can use the same structure as the screw tightening mechanism 401. The difference is that in the screw tightening mechanism 401, the screwdriver will first tighten the wiring screw 102 to the bottom to confirm that its thread function is normal. Then the screw loosening mechanism 402 will loosen it, allowing the washer on the wiring screw 102 to fall due to gravity and create a gap between it and the bolt head. This makes it easier for the top of the clamp 103 to be inserted into the gap between the two, which is convenient for installation.

[0039] In a preferred embodiment, a screw tightening mechanism 8 is provided between the fourth feeding device 6 and the unloading device 7.

[0040] With this configuration, the screw tightening mechanism 8 can use the same structure as the screw tightening mechanism 401. The terminal block 104 and the terminal block 101 can be loosely connected with a clearance fit. Then, by relying on the screw tightening mechanism 8 to tighten the terminal screw 102, the clamp 103 is pressed onto the terminal block 104 to clamp it, thereby stabilizing the various parts.

[0041] In a preferred embodiment, the second feeding device 4 is provided with an attractive magnet 403 at the conveying position. The attractive magnet 403 is an annular ring with an inner hole that is adapted to the screwdriver of the screw tightening mechanism 401. The second feeding device 4 is provided with a mounting hole 404 at the top position of the attractive magnet 403.

[0042] With this setup, the conveying position of the second feeding device 4, which is also the position of the robotic arm, is set with an attractive magnet 403 to achieve the gripping effect. This allows the wiring screw 102 to be easily pulled up. After the screw is placed in the screw hole position on the terminal block 101, the screwdriver of the screw tightening mechanism 401 passes through the mounting hole 404 to screw the wiring screw 102 in and connect it. After connection, the robotic arm of the second feeding mechanism 602 can return to its position. The magnetic force of the attractive magnet 403 will not affect the already screwed wiring screw 102. The structure is simple and the installation is stable. A non-magnetic steel can be fitted over the attractive magnet 403 to avoid interfering with other parts.

[0043] In this preferred embodiment, the conveying device 2 is a turntable, and there are two conveying devices 2. A material transfer mechanism 202 is provided between the two conveying devices 2. The material transfer mechanism 202 transfers the terminal assembly 1 from one conveying device 2 to the other conveying device 2.

[0044] With this setup, using a turntable as the conveyor device 2 makes it easier to create a circular structure. Each feeding device only needs to be set around the turntable to achieve automation. Setting up two turntables reduces the number of devices around the same turntable, avoiding overcrowding and mutual interference. Furthermore, the other turntable can be equipped with mounting bases with different grooves to adapt to different stages of assembly, resulting in better assembly performance.

[0045] In a preferred embodiment, the material transfer mechanism 202 includes a material transfer frame 2021 and a first material transfer robot 2022. The material transfer frame 2021 is provided with at least one transfer seat 20211, and the number of the first material transfer robot 2022 is one more than the number of transfer seats 20211.

[0046] With this setup, the first transfer robot 2022 will remove the semi-finished terminal assembly 1 from one turntable and move it to the slot on the transfer seat 20211. Multiple transfer robots 2022 working together can continuously transfer the semi-finished terminal assembly 1 to another turntable. The distance between the two turntables is divided by the transfer seat 20211, thus reducing the displacement distance of the multiple transfer robots 2022. The more transfer seats 20211 there are, the shorter the displacement distance and the more stable the operation.

[0047] In a preferred embodiment, a waste discharge mechanism 501 is provided between the third feeding device 5 and the fourth feeding device 6. The waste discharge mechanism 501 includes a waste discharge component 5011, a waste discharge bucket 5012, and a sensor 5013.

[0048] With this setup, since the gap between the bolt head of the wiring screw 102 and the washer is small, the installation of the clamp 103 may be incorrect. Therefore, after the clamp 103 is installed, a waste removal mechanism 501 is set up so that the assembly status can be sensed by the sensor 5013. If an abnormality is detected, the waste removal component 5011 is used to remove it and put it into the waste removal bin 5012 to avoid further assembly on this waste material and causing waste.

[0049] In this preferred embodiment, the waste discharge component 5011 is a robotic arm, and the sensor 5013 is located at the claw position of the waste discharge component 5011.

[0050] With this configuration, the robotic arm can perform a clamping action on the clamp plate 103, which can further tighten the grip. At the same time, the sensor 5013 located on the claw can sense the status. The structure is simple, and the sensor 5013 can use a short-headed optical fiber for sensing.

[0051] In a preferred embodiment, the fourth feeding device 6 includes a first feeding mechanism 601, a second feeding mechanism 602, a conveying mechanism 603, and a inserting robot 604. The conveying mechanism 603 is provided with a plurality of second mounting seats 6031. The first feeding mechanism 601 and the second feeding mechanism 602 respectively feed the stationary contact piece 1041 and the contact point 1042 into the second mounting seat 6031. The inserting robot 604 inserts the wiring piece 104 installed in the second mounting seat 6031 into the first mounting seat 201.

[0052] With this configuration, the first feeding mechanism 601 and the second feeding mechanism 602 can assemble the connector 104 without manual installation or installation of the stationary contact 1041 and contact 1042 on other equipment. Instead, the equipment for installing the connector 104 can be directly connected, further reducing manual labor and increasing efficiency. The conveying mechanism 603 can also use a turntable, resulting in a high degree of automation.

[0053] In a preferred embodiment, the fourth feeding device 6 further includes a linear feeder 605 and a second material transfer machine 606. The linear feeder 605 is positioned toward the inserting manipulator 604, and the second material transfer machine 606 transfers the connector 104 installed in the second mounting base 6031 to the linear feeder 605.

[0054] With this setup, the feeding via the linear feeder 605 is more stable, and the multiple connecting pieces 104 will not interfere with each other even when they overlap. The end of the linear feeder 605 will be equipped with a mounting bracket that is compatible with the connecting pieces 104, making it convenient for the inserting robot 604 to grasp and install them.

[0055] In this preferred embodiment, a fifth feeding device 9 is provided between the fourth feeding device 6 and the unloading device 7, and the conveying device 2 is provided with a third mounting base 901. The fifth feeding device 9 feeds the arc-blocking plate 105 into the third mounting base 901.

[0056] With this setup, if a terminal assembly 1 with an arc-shielding plate 105 is to be produced, it can be processed using the fifth feeding device 9. The terminal piece 104 of the terminal assembly 1 without the arc-shielding plate 105 can be straight, while the terminal piece 104 with the arc-shielding plate 105 needs to be Z-shaped. The third mounting base 901 will be set in a shape that facilitates the installation of the arc-shielding plate 105. In this way, when the terminal piece 104 is installed by the fourth feeding device 6, it will not be fully inserted. There will be a gap between its vertical plate and the terminal base 101. After it moves to the position of the fifth feeding device 9, the fifth feeding device 9 can insert and install the arc-shielding plate 105.

[0057] In a preferred embodiment, the third mounting base 901 is provided with a mounting groove 9011, and a connection socket 9012 communicating with the mounting groove 9011 is provided on one side of the third mounting base 901. A clamping member 9013 is provided on each side of the connection socket 9012, and the third mounting base 901 is provided with a driving member 9014 that applies a force to the clamping member 9013 toward the connection socket 9012.

[0058] With this configuration, the semi-finished terminal assembly 1 can be placed in the mounting slot 9011, and then the connector 9012 is used for the fourth feeding device 6 to insert the terminal piece 104. If the terminal piece 104 is not fully inserted, its position is unstable and it may move during the conveying process. The clamping parts 9013 on both sides will clamp the terminal piece 104 from both sides under the action of the driving part 9014 to prevent its displacement and will not affect the installation of the arc-blocking plate 105.

[0059] In a preferred embodiment, the third mounting base 901 is provided with a sliding groove 9015 adapted to the clamping member 9013, and the driving member 9014 is a spring, which is located on the side of the sliding groove 9015 facing away from the connecting socket 9012.

[0060] With this configuration, the spring can continuously apply force to the clamping member 9013 without power output, which saves more costs. Under the action of the spring, the clamping member 9013 will push against the terminal piece 104 located in the connection socket 9012 in the sliding groove 9015 and clamp it from both sides.

[0061] In this preferred embodiment, the sliding groove 9015 penetrates the top surface of the third mounting base 901.

[0062] With this configuration, the clamping member 9013 can be set higher to accommodate the taller wiring piece 104. At the same time, the cross-sections of the sliding groove 9015 and the clamping member 9013 can be set in a convex shape to prevent them from popping out from above.

[0063] In a preferred embodiment, the third mounting base 901 is provided with connecting blocks 9016 on both sides, the connecting blocks 9016 are detachably connected to the third mounting base 901, and the sliding groove 9015 is provided through the side of the third mounting base 901.

[0064] With this setup, the clamping component 9013 and the driving component 9014 can be inserted first, and then the connecting block 9016 can be installed. This makes installation convenient. The connecting block 9016 can be connected to the third mounting base 901 using conventional methods such as bolts or snap-fits.

[0065] In this preferred embodiment, the connecting block 9016 is L-shaped, and the position gap between the connecting block 9016 and the sliding groove 9015 on the third mounting base 901 is provided. Both the connecting block 9016 and the clamping member 9013 have a reset groove 90161 adapted to the driving member 9014 on the side facing each other.

[0066] With this design, the L-shape can indirectly increase the sliding distance of the clamping part 9013, and the reset groove 90161 can stabilize the spring and prevent it from flying around.

[0067] The above settings are not limited. The reset groove 90161 can be set on only one part, or it can be set as a positioning rod structure for positioning.

[0068] In this preferred embodiment, the clamping member 9013 is provided with a limiting setting, and a gap is provided between the two clamping members 9013.

[0069] This configuration makes it easier to install the connector 104 by increasing the gap between the two clamps 9013.

[0070] In a preferred embodiment, the clamping member 9013 is provided with a limiting block 90131 on the side facing away from the sliding groove 9015.

[0071] With this configuration, the limiting block 90131 will abut against the opening of the sliding groove 9015, preventing it from being pushed too far. The structure is simple, and the gap of the L-shaped connecting block 9016 allows for easy setting of the limiting block 90131 without interference.

[0072] In this preferred embodiment, the opening on the side of the sliding groove 9015 facing away from the mounting groove 9011 and the end face of the clamping member 9013 facing the sliding groove 9015 are flared openings that expand outwards.

[0073] With this setup, even if the connector 104 is slightly off-center after the flare is set, it can still be inserted along the flare, making the installation more stable.

[0074] In a preferred embodiment, the fifth feeding device 9 includes a vibratory feeder assembly 902, a pusher assembly 903, a steering wheel 904, a steering block 905, and a feeding robot 906. The steering block 905 is provided with a steering socket 9051 adapted to the arc-blocking plate 105. The pusher assembly 903 sends the arc-blocking plate 105 to the steering socket 9051. The steering wheel 904 drives the steering block 905 to rotate. The feeding robot 906 moves the arc-blocking plate 105 on the steering block 905 into the mounting groove 9011.

[0075] With this setup, the vibratory feeder in the vibratory feeder assembly 902 will transport the arc-breaking plate 105 to the feeder and then to the mounting bracket position at the end that matches the shape of the arc-breaking plate 105. The feeder can be a linear vibratory type or a cylinder blowing type. Then, the pusher assembly 903 will send the horizontal arc-breaking plate 105 into the steering socket 9051. Then, the steering wheel 904 driven by the motor will rotate with the steering block 905, turning the horizontal arc-breaking plate 105 to the vertical direction. In this way, the loading robot 906 can pick up the vertical arc-breaking plate 105 and insert it for installation.

[0076] The above settings are not limited. The push plate assembly 903 can be a structure in which the cylinder drives the push block to push the arc-blocking plate 105 delivered to the position by the vibratory feeder assembly 902. Alternatively, a transfer platform and a robot arm can be set up. The transfer platform is provided with a groove and a stabilizing structure that are compatible with the arc-blocking plate 105 to facilitate the push block to push. The robot arm moves the arc-blocking plate 105 from the end of the vibratory feeder assembly 902 to the groove on the transfer platform. This can avoid instability at the end of the vibratory feeder assembly 902. Alternatively, a horizontal robot arm can be used to directly grab the arc-blocking plate 105 and insert it into the steering socket 9051.

[0077] In a preferred embodiment, the steering socket 9051 is provided with a stabilizing block 907, which is reset in the direction of the steering socket 9051.

[0078] With this configuration, the stabilizing block 907 can hold the arc-blocking plate 105 in the steering socket 9051, preventing the arc-blocking plate 105 from flying out during steering, thus making it more stable. The stabilizing block 907 can use the same structure as the clamping component 9013, or it can be equipped with a separate drive to drive its reset clamping.

[0079] In a preferred embodiment, a top plate mechanism 908 is provided between the fifth feeding device 9 and the unloading device 7. The top plate mechanism 908 includes a telescopic member 9081 and a top rod 9082. The telescopic member 9081 controls the top rod 9082 to move toward the connecting socket 9012.

[0080] With this setup, the insertion of the arc-blocking plate 105 is not yet stable enough, and there is a possibility that it may fall out. At this time, when it moves to the top plate mechanism 908, the telescopic component 9081 will drive the push rod 9082 to push towards the connecting piece 104, pushing the connecting piece 104 onto the arc-blocking plate 105. The protrusion of the connecting piece 104 is inserted into the hole on the arc-blocking plate 105, thus fixing the two together and making them more stable. The telescopic component 9081 can be a cylinder, hydraulic cylinder, electric push rod, or other parts.

[0081] In this preferred embodiment, the screw tightening mechanism 8 is located above the top plate mechanism 908.

[0082] With this setup, the screw tightening step can be synchronized with the top plate step. When the top rod 9082 presses against the terminal block 104, the terminal screw 102 is tightened at the same time, saving time and space.

[0083] Although the present invention has been described in detail with reference to the foregoing embodiments, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic assembly machine for terminal block assemblies, characterized in that: The device includes a conveying device, a first feeding device, a second feeding device, a third feeding device, a fourth feeding device, and a discharging device. The conveying device is equipped with several first mounting seats. The first feeding device, the second feeding device, the third feeding device, and the fourth feeding device respectively feed the terminal block, the terminal screw, the clamp, and the terminal piece into the first mounting seat. The second feeding device is equipped with a screw tightening mechanism.

2. The automatic assembly machine for a terminal block assembly according to claim 1, characterized in that: A screw loosening mechanism is provided between the second feeding device and the third feeding device.

3. An automatic assembly machine for a terminal block assembly according to claim 2, characterized in that: A screw tightening mechanism is provided between the fourth feeding device and the unloading device.

4. An automatic assembly machine for a terminal block assembly according to claim 1, characterized in that: The second feeding device has an attractive magnet at its conveying position. The attractive magnet is an annular ring with an inner hole that fits the screwdriver of the screw tightening mechanism. The second feeding device has a mounting hole at the top of the attractive magnet.

5. An automatic assembly machine for a terminal block assembly according to claim 1, characterized in that: The conveying device is a turntable, and there are two conveying devices. A material transfer mechanism is provided between the two conveying devices, and the material transfer mechanism transfers the terminal assembly from one conveying device to the other conveying device.

6. An automatic assembly machine for a terminal block assembly according to claim 5, characterized in that: The material transfer mechanism includes a material transfer frame and a first material transfer robot. The material transfer frame is provided with at least one transfer seat, and the number of the first material transfer robot is one more than the number of transfer seats.

7. An automatic assembly machine for a terminal block assembly according to claim 1, characterized in that: A waste discharge mechanism is provided between the third feeding device and the fourth feeding device. The waste discharge mechanism includes a waste discharge component, a waste discharge bucket, and a sensor.

8. An automatic assembly machine for a terminal block assembly according to claim 7, characterized in that: The waste removal component is a robotic arm, and the sensor is located at the claw of the waste removal component.

9. An automatic assembly machine for a terminal block assembly according to claim 1, characterized in that: The fourth feeding device includes a first feeding mechanism, a second feeding mechanism, a conveying mechanism, and a inserting robot. The conveying mechanism is equipped with several second mounting seats. The first feeding mechanism and the second feeding mechanism respectively feed the stationary contact piece and the contact point into the second mounting seat. The inserting robot inserts the wiring piece installed in the second mounting seat into the first mounting seat.

10. An automatic assembly machine for a terminal block assembly according to claim 9, characterized in that: The fourth feeding device further includes a linear feeder and a second transfer robot. The linear feeder is positioned facing the insert robot, and the second transfer robot moves the connector plate installed in the second mounting base to the linear feeder.

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