A screw and nut feeder with an upper electrode feeding mechanism

Abstract

This utility model discloses a screw and nut feeder with an upper electrode feeding mechanism for feeding a welding machine. It includes: a feeder body; and a feeding assembly mounted on the feeder body, comprising a feeding gun, a feeding hose, and a tilting block. The feeding hose conveys material to the tilting block, which has a receiving cavity for holding the material. The tilting block is rotatably connected to the feeding gun for transporting material (nuts or screws) to the welding machine. The advantage of this utility model is that by using a tilting block to feed the upper electrode assembly of the welding machine, interference between the feeding gun and the workpiece can be effectively avoided, and the accuracy of the feeding position and feeding speed can be guaranteed. The design of the tilting block allows the material to be stably conveyed to the designated position, enabling rapid feeding of the upper electrode assembly, thereby improving product quality and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, specifically to a screw and nut feeder with an upper electrode feeding mechanism. Background Technology

[0002] Resistance welding is used in the automotive body-in-white or sheet metal industry for projection welding of nuts or screws. Nuts or screws are paired with resistance welding machines, which automatically feed the nuts or screws onto the electrodes of the resistance welding machine, thereby realizing automated welding. This reduces the manual placement of nuts or screws, increases labor intensity, increases production capacity, reduces the risk of workplace injuries, and realizes an automated production line for the industry.

[0003] For standard nuts or screws located on the machine body, a conventional conveyor feeder (commonly known as a "conveyor gun") is used to transport them to the lower electrode of the welding machine. This method is suitable for over 95% of parts. The conveyor gun has no accessibility issues. However, for a very small number of parts with raised or recessed edges, the conveyor gun may interfere with the part itself or with the tooling fixtures during operation.

[0004] Technical characteristics of existing feeding (nut or screw) mechanisms:

[0005] 1. It can only feed material onto the lower electrode of the resistance welding machine;

[0006] 2. It is prone to interference with tooling fixtures, which makes fixture design more difficult and increases fixture production costs;

[0007] 3. Interference with some workpieces makes automatic feeding impossible, requiring manual feeding only. Utility Model Content

[0008] To solve the above-mentioned technical problems, this utility model provides a screw and nut feeder with an upper electrode feeding mechanism, which avoids interference between the feed gun and the workpiece, ensures accurate and fast feeding position, and guarantees welding quality.

[0009] Specifically, this utility model discloses a screw and nut feeder with an upper electrode feeding mechanism for feeding a welding machine, comprising:

[0010] Feeder body;

[0011] The feeding assembly, installed on the feeder body, includes a feeding gun, which is provided with a feeding hose and a tilting block. The feeding hose is used to transport materials into the tilting block, and the tilting block is provided with a receiving cavity for holding materials. The tilting block and the feeding gun are rotatably connected for transporting materials to the welding machine.

[0012] The advantages of adopting the above technical solution are that setting the flipping block for feeding the upper electrode assembly of the welding machine can effectively avoid the problem of interference between the feeding gun and the workpiece, and also ensure the accuracy of the feeding position and the feeding speed. The design of the flipping block allows the material to be stably transported to the designated position, reducing deviations and errors during the feeding process. At the same time, its rotatable characteristic makes the feeding process more efficient, enabling the rapid completion of the upper electrode assembly feeding, thereby improving product production quality and efficiency.

[0013] Furthermore, the welding machine includes: a frame, on which an upper electrode assembly and a lower electrode assembly are disposed. The upper electrode assembly includes: an upper electrode cylinder, an electrode grip rod, a hollow inner rod, and an electrode cap. The upper electrode cylinder is disposed on the upper side of the electrode grip rod and connected to the hollow inner rod disposed within the electrode grip rod. The electrode cap is disposed on the lower side of the electrode grip rod and connected to the electrode grip rod.

[0014] The advantage of adopting the above technical solution is that the upper electrode cylinder drives the hollow inner rod to rise and fall, and then descends into the flipping head to realize the material picking operation.

[0015] Furthermore, the hollow inner rod has a passage cavity inside, and the lower end of the hollow inner rod is provided with a protruding head. The protruding head is provided with multiple upwardly inclined air outlets. During feeding, the air outlets blow air to receive the material transported by the tilting block.

[0016] The advantage of adopting the above technical solution is that when the tilting block reaches the feeding position, the hollow inner rod descends. At this time, the air outlet is located on the lower side of the material. Then, the air outlet blows air to provide an upward lifting force for the material. The tilting block can retract. The air-supported material picking method has a simple structure, is easy to control, does not require the installation of other material picking structures, and reduces costs.

[0017] Furthermore, the feeding gun also includes: a feeding cylinder, a cylinder barrel, a telescopic outer rod, and a telescopic inner rod. The telescopic inner rod is disposed inside the telescopic outer rod, and the telescopic outer rod is disposed inside the cylinder barrel. The feeding cylinder drives the telescopic outer rod and the telescopic inner rod to extend. The telescopic outer rod is connected to the tilting block via a connecting rod, and the telescopic inner rod is connected to the tilting block via a pin. The connecting rod is located above the pin, and the extension length of the telescopic inner rod is greater than that of the telescopic outer rod.

[0018] The advantages of adopting the above technical solution are that the telescopic outer rod and telescopic inner rod drive the tilting block to move. After moving into position, the telescopic outer rod stops extending, while the telescopic inner rod continues to extend, causing the entire tilting block to rotate at a certain angle and become horizontal, thus preventing interference with the workpiece and ensuring smooth feeding. The design of the telescopic inner rod extending longer than the telescopic outer rod cleverly achieves angle adjustment of the tilting block, allowing the material to be conveyed to the upper electrode assembly in a suitable posture. This design not only solves the problem of interference with the workpiece but also improves the flexibility and adaptability of feeding.

[0019] Furthermore, the cylinder end is provided with an outer rod limiting ring, the telescopic outer rod is provided with a protruding ring, and the end of the telescopic outer rod is connected to the feeding cylinder by a compression spring.

[0020] The advantages of the above technical solution are that the outer rod limiting ring restricts the extreme position of the telescopic outer rod extension, and the compression spring allows the telescopic inner rod to continue extending after the telescopic outer rod is in place, so that the flipping block can rotate to the upper electrode assembly at a suitable angle for material picking, thus completing the feeding. The structure is simple and does not require manual operation. The compression spring ensures that the telescopic outer rod and the telescopic inner rod remain relatively stationary. The spring preload is greater than the frictional force during the outward movement of the telescopic outer rod, so the flipping block maintains a uniform posture during the extension and retraction process.

[0021] Furthermore, a storage head is provided at the end of the feeding hose, a distributing plate is provided inside the storage head, the distributing plate is connected to a distributing cylinder, the distributing plate drives the distributing cylinder to slide inside the storage head, and the storage head has a discharge channel.

[0022] The advantage of adopting the above technical solution is that the material distribution plate is used to close or open the discharge channel. When the material distribution plate is open, it allows one material to pass through. The material that passes through enters the flip block. When the material distribution plate is closed, it waits for the next feeding. The structure is simple and ensures smooth feeding.

[0023] Furthermore, the frame is equipped with a movable module, and the upper electrode assembly is connected to the movable module, which drives it to move up and down.

[0024] The advantage of adopting the above technical solution is that the setting of the moving module drives the entire upper electrode assembly to move, presses the workpiece and materials, ensures that the upper and lower electrodes are energized, and ensures the welding quality.

[0025] Furthermore, the connecting rod is provided with pin three and pin four at both ends. Pin three is rotatably installed with the telescopic outer rod, and pin four is rotatably connected with the telescopic inner rod.

[0026] The advantages of adopting the above technical solution are that the multiple pins ensure smooth and precise rotation of the entire tilting block, effectively preventing collisions and improving the safety and stability of the equipment compared to the non-rotatable feeding head in existing technologies. Simultaneously, the rotatable connection method makes the tilting block more flexible during movement, better adapting to different feeding needs and working environments.

[0027] Furthermore, the hollow inner rod is fitted with a spring, the electrode grip rod has a cavity for accommodating the spring, and the electrode grip rod has a sealing gasket.

[0028] The advantages of adopting the above technical solution are that the spring can act as a buffer, the chamber provides suitable installation space for the spring, and ensures that the spring can function properly. The sealing gasket prevents gas leakage, ensures the vent supports the material, guarantees the normal operation and good performance of the upper electrode assembly, and further improves welding quality and equipment stability. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0030] Figure 1 This is a schematic diagram of the overall structure of the screw and nut feeder with an upper electrode feeding mechanism according to this utility model.

[0031] Figure 2 This is an enlarged view of section A of this utility model.

[0032] Figure 3 This is a schematic diagram of the upper electrode assembly structure of this utility model.

[0033] Figure 4 This is an enlarged view of section B of this utility model.

[0034] Figure 5 This is a schematic diagram of the feeding gun structure of this utility model.

[0035] Figure 6 This is a partial view of the feed gun of this utility model.

[0036] Figure 7 This is a schematic diagram of the flip head connection of this utility model.

[0037] The reference numerals used in the attached figures are as follows:

[0038] Frame 1; Feeder body 11; Upper electrode assembly 2; Upper electrode cylinder 21; Electrode gripping rod 22; Air inlet 221; Hollow inner rod 23; Electrode cap 24; Protruding head 25; Air outlet 251; Spring 26; Sealing gasket 27; Passing cavity 28; Lower electrode assembly 3; Feeding gun 4; Feeding cylinder 41; Cylinder barrel 42; Outer rod limiting ring 421; Telescopic outer rod 43; Protruding ring 431; Telescopic inner rod 44; Connecting rod 45; Pin three 451; Pin four 452; Pin one 46; Compression spring 47; Connecting nut 48; Feeding hose 5; Tilting block 6; Storage head 7; Distributing plate 71; Distributing cylinder 72; Moving module 8; Clamping block 81. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings.

[0040] like Figure 1-7 As shown, this utility model discloses a screw and nut feeder with an upper electrode feeding mechanism for feeding a welding machine. The welding machine includes: a frame 1, on which an upper electrode assembly 2 and a lower electrode assembly 3 are disposed, including:

[0041] Feeder body 11;

[0042] The feeding assembly, installed on the feeder body 11, includes a feeding gun 4, which is provided with a feeding hose 5 and a tilting block 6. The feeding hose 5 is used to transport materials into the tilting block 6. The tilting block 6 is provided with a receiving cavity for holding materials. The tilting block 6 and the feeding gun 4 are rotatably connected to transport materials to the upper electrode assembly 2.

[0043] The advantages of adopting the above technical solution are that setting the flipping block 6 for feeding the upper electrode assembly 2 of the welding machine can effectively avoid the problem of interference between the feeding gun 4 and the workpiece, and can also ensure the accuracy of the feeding position and the feeding speed. The design of the flipping block 6 allows the material to be stably transported to the designated position, reducing deviations and errors in the feeding process. At the same time, its rotatable characteristic makes the feeding process more efficient, and can quickly complete the feeding of the upper electrode assembly 2, thereby improving the production quality and production efficiency of the product.

[0044] Furthermore, the upper electrode assembly 2 includes: an upper electrode cylinder 21, an electrode gripping rod 22, a hollow inner rod 23, and an electrode cap 24. The upper electrode cylinder 21 is fixedly installed on the upper side of the electrode gripping rod 22, and its output end is connected to the hollow inner rod 23 disposed inside the electrode gripping rod 22. The electrode cap 24 is disposed on the lower side of the electrode gripping rod 22 and connected to the electrode gripping rod 22. The hollow inner rod 23 is a hollow rod with a passage cavity 28 inside and an air inlet channel on its upper side. The electrode gripping rod 22 is provided with an air inlet 221, which communicates with the passage cavity 28. An air inlet pipe is connected to the outside of the air inlet 221. The air inlet pipe is equipped with a solenoid valve and connected to an air source to provide gas to the passage cavity 28. The lower end of the hollow inner rod 23 is provided with an extension head 25. The extension head 25 is provided with multiple upwardly inclined air outlets 251. The lower end of the air outlets 251 is connected to the passage cavity 28 and is symmetrically arranged on both sides of the passage cavity 28 to release air together. When feeding, the air outlets 251 blow air to receive the material transported by the tilting block 6, providing an upward force to the transported material, i.e., the nut, so that the nut is fixed on the extension head 25 and moves with the extension head 25.

[0045] Furthermore, the hollow inner rod 23 is fitted with a spring 26, and the electrode grip 22 is provided with a chamber for accommodating the spring 26. A sealing gasket 27 is provided inside the electrode grip 22, and the sealing gasket 27 is located on the lower side of the chamber. The spring 26 can play a buffering role. When the hollow inner rod 23 moves up and down, it can reduce the impact force on the hollow inner rod 23 and the electrode grip 22, and extend their service life.

[0046] Furthermore, the frame 1 is equipped with a movable module 8, and the upper electrode assembly 2 is connected to the movable module 8. The movable module 8 drives the upper and lower movement. The movable module 8 can be a lead screw motor module or a cylinder module. It is fixedly installed on the frame 1 as a whole, and a clamping block 81 is fixedly installed at the bottom. The clamping block 81 clamps and fixes the electrode handle 22. Driven by the movable module 8, the upper electrode assembly 2 moves, pressing the material and the workpiece to be welded, so that it is close to the lower electrode assembly 3, ensuring the welding position and welding quality.

[0047] Furthermore, the feeding gun 4 also includes: a feeding cylinder 41, a cylinder barrel 42, a telescopic outer rod 43, and a telescopic inner rod 44. The telescopic inner rod 44 is located inside the telescopic outer rod 43, and the telescopic outer rod 43 is located inside the cylinder barrel 42 and can move along the cylinder barrel 42. The feeding cylinder 41 drives the telescopic outer rod 43 and the telescopic inner rod 44 to extend. The telescopic outer rod 43 is connected to the tilting block 6 through a connecting rod 45. The connecting rod 45 is symmetrically arranged, and its two ends are connected to the telescopic outer rod 43 and the tilting block through pin three 451 and pin four 452. Pin three 451 is rotatably installed with the telescopic outer rod 43, and pin four 452 is rotatably connected with the tilting block 6. The telescopic inner rod 44 is connected to the tilting block 6 through pin one 46. The connecting rod 45 is located on the upper side of pin one 46, and the extension length of the telescopic inner rod 44 is greater than that of the telescopic outer rod 43. The feeding cylinder 41 is equipped with a position sensor to sense the position of the piston and ensure accurate feeding position.

[0048] In other embodiments, a cylinder output rod (or motor output shaft) can be connected to the telescopic outer rod 43. First, the telescopic outer rod 43 is moved to its foremost position, and the cylinder or motor keeps the telescopic outer rod 43 stationary. Then, the telescopic inner rod 44 is connected to another cylinder output rod (or motor output shaft) to enable the telescopic inner rod 44 to continue moving forward, thereby realizing the action of the flipping block 6. This method involves the independent driving of the telescopic outer rod 43 and the telescopic inner rod 44, which can also complete the flipping of the flipping block 6.

[0049] Furthermore, the entire cylinder 42 is installed at an angle and is fixed to the frame 1 by a mounting bracket. The position and angle of the cylinder 42 can be adjusted. An outer rod limiting ring 421 is fixedly installed at the bottom end of the cylinder 42. The telescopic outer rod 43 is provided with a protruding ring 431. When the feeding cylinder 41 extends to the position, the protruding side contacts the outer rod limiting ring 421, limiting the extension length of the telescopic outer rod 43. At the same time, the end of the telescopic outer rod 43 is connected to the feeding cylinder 41 through a compression spring 47. With this configuration, when the telescopic outer rod 43 is stationary, the feeding cylinder 41 continues to extend, and the spring is compressed. At this time, the extension length of the telescopic inner rod 44 is longer, pushing the lower end of the flipping block 6. The flipping block 6 rotates a certain angle along the pin 46 and becomes horizontal, which facilitates the electrode gripping rod 22 to pick up the material.

[0050] Meanwhile, a connecting nut 48 is installed at the output end of the feeding cylinder 41. The connecting nut 48 is provided with external threads, which are connected to the external threads on the telescopic inner rod 44 to ensure the connection strength of the telescopic inner rod 44. The protruding ring 431 is provided with an annular groove on its side and a friction ring is installed inside. The telescopic outer rod 43 guide sleeve is installed inside the cylinder 42, and the inner rod guide sleeve is fixed inside the telescopic outer rod 43 to ensure smooth extension and retraction of the telescopic outer rod 43 and the telescopic inner rod 44.

[0051] In some implementation schemes, symmetrical arc-shaped grooves are also provided at the end of the telescopic outer rod 43, and the bottom of the flipping block 6 is also arc-shaped. When the flipping block 6 flips, the arc-shaped corners of the flipping block 6 are always in contact with the arc-shaped grooves, which play a supporting and limiting role.

[0052] In some implementations, a storage head 7 is provided at the end of the feeding hose 5. A distribution plate 71 is provided inside the storage head 7. The distribution plate 71 is connected to a distribution cylinder 72. The distribution plate 71 drives the distribution cylinder 72 to slide inside the storage head 7. The storage head 7 has a discharge channel. The upper end of the discharge channel is connected to the feeding hose 5. The feeding hose 5 is connected to the feeder body 11, so that the conveyed material, i.e., nuts, is arranged inside the feeding hose 5. The feeder body 11 has a vibrating plate to arrange the feeding nuts or screws. When the distribution plate 71 retracts, a piece of material falls into the tilting block 6 through the feeding channel. Then the distribution plate 71 extends to prevent other materials from falling, ensuring that one piece of material is transported at a time and ensuring smooth feeding.

[0053] Working principle and process:

[0054] First, the workpiece is manually or mechanically loaded onto the lower electrode assembly 3. The material is then conveyed to the storage head 7 in an orderly manner through the discharge port on the feeder body 11 via the feed hose 5. When the number of nuts in the hose reaches the position of the sensor at the front end of the hose (which can be an electromagnetic induction sensor), the sensor sends a signal to the host PLC to stop feeding the feed gun 4. The nuts are then arranged in an orderly manner in the hose and the storage head 7.

[0055] In the initial position of the feed gun cylinder 4, the piston of the feed cylinder 41 is at the rear end of the cylinder in a retracted state, and the piston of the distribution cylinder 72 is at the front end in an extended state, blocking the discharge channel of the storage head 7. The nut cannot fall freely into the flip block 6. At this time, the nuts are arranged in an orderly manner in the storage head 7. When the PLC receives the start signal, the piston of the distribution cylinder 72 retracts to the rear end, the distribution plate 71 slides backward along the storage head 7, the discharge channel in the storage head 7 opens, and the nut at the front end falls freely into the flip block 6.

[0056] After a certain delay, the nut falls into the flipping block 6, and the material distribution cylinder 72 pushes the material distribution plate 71 to seal the material drop port again to prevent material from falling due to vibration during the welding process. Then, the feeding cylinder 41 pushes the telescopic inner and outer rods to extend outwards at the same time. In order for the inner and outer rods to move simultaneously, a compression spring 47 is installed at the tail end of the telescopic outer rod 43 and sleeved on the outside of the inner rod. The compression spring 47 is located between the tail end of the outer rod and the connecting nut 48, and is pre-compressed by a certain amount so that the clamping force is greater than the sum of the friction force between the outer rod guide sleeve and the telescopic outer rod 43 and the friction force between the friction ring and the inner wall of the cylinder 42, so as to ensure that the telescopic outer rod 43 and the telescopic inner rod 44 are relatively stationary while telescopically extending and retracting. When the protruding ring 431 contacts the outer rod limiting ring 421, the telescopic outer rod 43 remains stationary, while the telescopic inner rod 44 continues to move forward. The piston of the feeding cylinder 41 moves to its foremost position, and the telescopic inner rod 44 drives the tilting block 6 to move forward. The tilting block 6 rotates along pin 1 46. The tilting block 6 and the connecting rod 45 are linked through pins 2 and 3, realizing the tilting movement of the tilting block 6. The entire tilting block 6 is in a horizontal state. The set state is reached, and it reaches below the upper electrode.

[0057] Then, the piston of the upper electrode cylinder 21 is initially positioned at the upper end of the cylinder, i.e., in the retracted state. The hollow inner rod 23 is connected to the cylinder piston rod through a nut with an air inlet. The upper electrode cylinder 21 is connected to the electrode grip rod 22 through threads. The spring 1 is placed outside the hollow inner rod 23 and inside the inner cavity of the electrode grip rod 22. The sealing gasket 27 is also assembled in the inner cavity of the electrode grip rod 22.

[0058] When the delivery gun delivers the nut to a certain position directly below the electrode on the welding machine, the PLC controls solenoid valve 1, causing the cylinder piston rod to move downwards. Simultaneously, the PLC controls the solenoid valve to allow compressed air to enter through the inlet. This compressed air then enters the cavity inside the electrode grip 22, proceeds through the hollow inner rod 23, and is finally discharged through the outlet 251. At this point, when the cylinder piston reaches its lowest point, the sealing gasket 27 seals the lower opening of the inner cavity of the electrode grip 22, ensuring all gas exits through the hollow inner rod 23 and is discharged through the outlet 251. Before the feed gun 4 exits, the lower end of the hollow inner rod 23 is inserted into the nut transported by the flipping block 6. The hollow inner rod 23 exhausts gas symmetrically from left to right at a certain angle, causing the gas to exit obliquely upwards. The nut is then removed from the flipping block 6, and the feed gun 4 returns. The flipping block 6 returns to its initial state (unflipped state). The upper electrode assembly 2 drives the nut to descend to the workpiece and press it to complete the welding, completing one cycle. After the mechanism delivers the nut or screw to the upper electrode assembly of the welding machine, the feed gun 4 extends its component and returns to its original position. There is almost no other material between the upper and lower electrodes of the welding machine. The workpiece and tooling fixtures have more space and freedom between the electrodes, facilitating workpiece entry and exit, increasing the welding cycle time, and improving production efficiency.

[0059] For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A screw nut feeder with an upper electrode feeding mechanism for feeding a welding machine, characterized in that, include: Feeder body (11); The feeding assembly, installed on the feeder body (11), includes a feeding gun (4), which is provided with a feeding hose (5) and a tilting block (6). The feeding hose (5) is used to transport materials into the tilting block (6). The tilting block (6) is provided with a receiving cavity for holding materials. The tilting block (6) and the feeding gun (4) are rotatably connected to transport materials to the welding machine.

2. The screw and nut feeder with an upper electrode feeding mechanism according to claim 1, characterized in that, The welding machine includes: a frame (1), on which an upper electrode assembly (2) and a lower electrode assembly (3) are provided. The upper electrode assembly (2) includes: an upper electrode cylinder (21), an electrode grip (22), a hollow inner rod (23), and an electrode cap (24). The upper electrode cylinder (21) is located on the upper side of the electrode grip (22) and is connected to the hollow inner rod (23) located inside the electrode grip (22). The electrode cap (24) is located on the lower side of the electrode grip (22) and is connected to the electrode grip (22).

3. The screw and nut feeder with an upper electrode feeding mechanism according to claim 2, characterized in that, The hollow inner rod (23) has a passage cavity (28) inside. The lower end of the hollow inner rod (23) is provided with an extension head (25). The extension head (25) is provided with multiple upwardly inclined air outlets (251). When feeding, the air outlets (251) blow air to receive the material transported by the flipping block (6).

4. The screw and nut feeder with an upper electrode feeding mechanism according to claim 1, characterized in that, The feeding gun (4) further includes: a feeding cylinder (41), a cylinder barrel (42), a telescopic outer rod (43), and a telescopic inner rod (44). The telescopic inner rod (44) is located inside the telescopic outer rod (43), and the telescopic outer rod (43) is located inside the cylinder barrel (42). The feeding cylinder (41) drives the telescopic outer rod (43) and the telescopic inner rod (44) to extend. The telescopic outer rod (43) is connected to the flipping block (6) through a connecting rod (45). The telescopic inner rod (44) is connected to the flipping block (6) through a first pin (46). The connecting rod (45) is located on the upper side of the first pin (46). The extension length of the telescopic inner rod (44) is greater than that of the telescopic outer rod (43).

5. The screw and nut feeder with an upper electrode feeding mechanism according to claim 4, characterized in that, The cylinder (42) is provided with an outer rod limiting ring (421) at its end, and the telescopic outer rod (43) is provided with a protruding ring (431). The end of the telescopic outer rod (43) is connected to the feeding cylinder (41) by a compression spring (47).

6. The screw and nut feeder with an upper electrode feeding mechanism according to claim 1, characterized in that, The feeding hose (5) is provided with a storage head (7) at its end. A distribution plate (71) is provided inside the storage head (7). A distribution cylinder (72) is connected to the distribution plate (71). The distribution plate (71) drives the distribution cylinder (72) to slide inside the storage head (7). The storage head (7) has a discharge channel.

7. The screw and nut feeder with an upper electrode feeding mechanism according to claim 2, characterized in that, The frame (1) is equipped with a moving module (8), and the upper electrode assembly (2) is connected to the moving module (8) and moves up and down through the moving module (8).

8. The screw and nut feeder with an upper electrode feeding mechanism according to claim 4, characterized in that, The connecting rod (45) is provided with a third pin (451) and a fourth pin (452) at both ends. The third pin (451) is rotatably installed with the telescopic outer rod (43), and the fourth pin (452) is rotatably connected with the telescopic inner rod (44).

9. The screw and nut feeder with an upper electrode feeding mechanism according to claim 3, characterized in that, The hollow inner rod (23) is fitted with a spring (26), the electrode grip (22) has a cavity for accommodating the spring (26), and the electrode grip (22) has a sealing gasket (27).

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