Mechanical jaw for dismounting electrode caps

Abstract

The application relates to a mechanical claw for dismounting an electrode cap, which comprises a frame body, a fixed plate fixedly installed on the frame body, a fixed claw fixedly installed on the fixed plate, a movable claw rotatably installed on the fixed plate, and an abutting elastic member close to the movable claw and providing abutting force for the movable claw; a clamping space for clamping the electrode cap is formed between the fixed claw and the movable claw; and the abutting elastic member is installed on the fixed plate. A mechanical hand puts the electrode cap on the electrode rod into the clamping space, the movable claw is subjected to the abutting force of the abutting elastic member, the movable claw clamps the fixed electrode cap in cooperation with the fixed claw, then the mechanical hand rotates the electrode rod so that the electrode cap and the electrode rod are no longer clamped, the electrode cap is clamped by the fixed claw and the movable claw and separated from the electrode rod, and the dismounting of the electrode cap is completed. The scheme can complete the dismounting of the electrode cap through a simple mechanical structure, is simple to install, and does not need to be controlled by a system.

Description

Technical Field

[0001] This application relates to the technical field of electrode cap replacement devices, and in particular to a mechanical chuck for removing electrode caps. Background Technology

[0002] In manufacturing, spot welding is a common method for joining parts. Electrode caps, as key consumable parts in spot welding, often experience issues such as slag adhesion, oxide layer formation, and excessive wear after prolonged use. This increases the resistance of the electrode caps, thus affecting the welding quality. Therefore, severely worn electrode caps must be replaced promptly.

[0003] The utility model patent application with application number CN202411132777.3 discloses an electric lever-type welding torch electrode cap removal device, including a frame, a cap removal mechanism, a lever mechanism, a striking mechanism, a shifting mechanism, and a motor. The cap removal mechanism includes a fixed fork pawl, a movable seat slidably connected to the frame along a first direction, and a movable fork pawl slidably connected to the movable seat along the first direction. Both the fixed fork pawl and the movable fork pawl are provided with a locking plate. The lever mechanism includes a lever arm hinged to the frame, a transmission block hinged to the lever arm, a transmission arm hinged to the lever arm, a transmission seat hinged to the transmission arm, and a lead screw threadedly connected to the transmission seat. The transmission block is slidably connected to the movable seat along a second direction, and the first and second directions are not parallel. The striking mechanism includes a striking hammer slidably connected to the movable seat along the first direction and capable of striking the movable fork pawl. Both the lead screw and the striking hammer are driven by the motor through the shifting mechanism.

[0004] The aforementioned technologies, which use an electrically driven transmission structure to disassemble the electrode cap, are overly complex, difficult to install, require a control system, and have a high failure rate. Therefore, this application proposes a simple mechanical gripper for disassembling electrode caps. Utility Model Content

[0005] This application proposes a mechanical chuck for removing electrode caps.

[0006] This application provides a mechanical gripper for disassembling electrode caps, employing the following technical solution:

[0007] A mechanical chuck for removing electrode caps includes a frame, a fixed plate fixedly mounted on the frame, a fixed chuck fixedly mounted on the fixed plate, a movable chuck rotatably mounted on the fixed plate, and an abutting elastic member close to the movable chuck and providing abutting force to the movable chuck; a clamping space for clamping the electrode cap is formed between the fixed chuck and the movable chuck; the abutting elastic member is mounted on the fixed plate.

[0008] By adopting the above technical solution, the robot arm places the electrode cap on the electrode rod into the clamping space. The movable jaw is subjected to the abutting force of the elastic element. The movable jaw cooperates with the fixed jaw to clamp the fixed electrode cap. Then, the robot arm rotates the electrode rod so that the electrode cap is no longer clamped to the electrode rod. The electrode cap is clamped by the fixed jaw and the movable jaw and then separated from the electrode rod, completing the disassembly of the electrode cap. This solution can complete the disassembly of the electrode cap with a simple mechanical structure. The installation is simple and does not require system control.

[0009] Preferably, the surfaces of both the fixed claw and the movable claw near the clamping space are fixed with serrations.

[0010] By adopting the above technical solution, the serrations increase the circumferential locking force between the fixed claw and the movable claw and the electrode cap, preventing the electrode cap from slipping between the fixed claw and the movable claw during the removal process, thus preventing the electrode cap from being removed.

[0011] Preferably, the serrations on the surfaces of the movable jaw and the fixed jaw are both helical teeth, and the serrations on the surfaces of the movable jaw and the fixed jaw face opposite directions.

[0012] By adopting the above technical solution, the circumferential locking force between the fixed claw and the movable claw and the electrode cap is further increased.

[0013] Preferably, there are two sets of fixed jaws and movable jaws, the openings of the clamping space formed by the two sets of jaws face opposite directions, and the serrations on the surfaces of the two sets of jaws face opposite directions.

[0014] By adopting the above technical solution, two sets of symmetrical claws are set up to remove the electrode caps on the upper and lower electrode rods respectively, which improves the efficiency of electrode cap removal.

[0015] Preferably, the abutting elastic element is a torsion spring, and a positioning post sleeved with the torsion spring is fixed on the fixing plate. The positioning post is positioned between two movable claws. The abutting arms at both ends of the torsion spring abut against the movable claws on both sides respectively.

[0016] By adopting the above technical solution, when the electrode cap is not clamped between the fixed claw and the movable claw, the movable claw is subjected to the force of the abutting elastic element and rotates around the end of the movable claw that is fixed to the fixed plate, reducing the clamping space. The fixed claw and the end of the movable claw that is away from the clamping space abut against each other, restricting the rotation of the movable claw and making the movable claw stationary.

[0017] Preferably, a sensor for detecting electrode caps is mounted on the fixing plate. The sensor is a photoelectric sensor and is located in the middle of the two sets of claws.

[0018] By adopting the above technical solution, the photoelectric sensor can detect whether the electrode cap has been removed, so as to avoid the problem that subsequent processes cannot be carried out because the electrode cap has not been removed.

[0019] Preferably, the movable claw has a guide slope on the end face near the opening of the clamping space.

[0020] By adopting the above technical solution, before the electrode cap enters the clamping area, it first comes into contact with the guide slope. The electrode cap pushes the movable claw, making the clamping space larger, so that the previously removed electrode cap will fall off automatically.

[0021] Preferably, the fixing plate is slidably mounted on the frame and perpendicular to the opening direction of the clamping space, and an elastic reset member providing a reset force is provided between the fixing plate and the frame.

[0022] By adopting the above technical solution, the setting of two slides makes the connection between the fixed plate and the frame more stable; when the electrode cap is clamped and fixed by the claw, the front and back positions of the claw can be adjusted by sliding the fixed plate back and forth, which adapts to the position error of the robotic arm and prevents the end of the electrode rod from being damaged by great stress.

[0023] Preferably, a slide is fixed on the fixed plate, and a sliding hole is formed through the slide, the axis of which is perpendicular to the opening direction of the clamping space; a sliding shaft is fixed on the frame and slides in cooperation with the sliding hole of the slide; the fixed plate is slidably fixed on the frame through the cooperation of the slide and the sliding shaft; the elastic reset component includes a spring, a limiting rod, a limiting plate and a slider, the slider is fixed on the fixed plate, the limiting plate is fixed on the frame, the limiting rod passes through the slider and the limiting plate and slides in cooperation with both, and the spring is sleeved on the limiting rod and abuts between the slider and the limiting plate.

[0024] By adopting the above technical solution, the fixed plate slides through the sliding hole opened on the slide table and cooperates with the sliding shaft on the frame. The slider on the fixed plate slides on the limit rod to compress the spring. The spring provides a restoring force to the slider, pushing the slider and thus restoring the fixed plate to its original position.

[0025] Preferably, a receiving groove is detachably installed on the frame, and the receiving groove is located directly below the claw to receive the dropped electrode cap.

[0026] By adopting the above technical solution, the receiving trough receives the fallen electrode caps, making it convenient to recycle the waste.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. A fixed plate is fixed to the frame, a fixed claw is fixedly mounted on the fixed plate, a movable claw is rotatably mounted on the fixed plate, and an elastic abutment provides abutment force to the movable claw. A clamping space for clamping the electrode cap is formed between the fixed claw and the movable claw. The robot arm puts the electrode cap on the electrode rod into the clamping space. The movable claw is subjected to the abutment force of the elastic abutment and cooperates with the fixed claw to clamp the fixed electrode cap. Then the robot arm rotates the electrode rod so that the electrode cap is no longer clamped to the electrode rod. The electrode cap is clamped by the fixed claw and the movable claw and then separated from the electrode rod, completing the disassembly of the electrode cap. This solution can complete the disassembly of the electrode cap with a simple mechanical structure, which is simple to install and does not require system control.

[0029] 2. On the surfaces of the fixed claw and the movable claw near the clamping space, helical teeth facing opposite directions are provided, which increases the circumferential locking force between the fixed claw and the movable claw and the electrode cap, and prevents the electrode cap from slipping between the fixed claw and the movable claw during the removal process, thus preventing the electrode cap from being removed.

[0030] 3. A slide table and a slider are installed on the fixed plate, and a sliding shaft, spring, limit rod, limit plate, and slider are installed on the frame. When the electrode cap is clamped and fixed by the chuck, the fixed plate slides through the sliding hole opened on the slide table and cooperates with the sliding shaft on the frame to adjust the front and rear position of the chuck, adapt to the position error of the robotic arm, and prevent the electrode rod end from being damaged by large stress. Then, the slider on the fixed plate slides on the limit rod to compress the spring. The spring provides a restoring force to the slider, pushing the slider and thus restoring the fixed plate to its original position. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the mounting structure of the chuck in an embodiment of this application;

[0033] Figure 3 This is a cross-sectional view of the elastic reset member in the embodiments of this application.

[0034] Reference numerals in the attached drawings: 1. Frame; 2. Fixed plate; 3. Fixed claw; 4. Movable claw; 5. Clamping space; 6. Serrated edge; 7. Abutting elastic element; 8. Sensor; 9. Slide table; 10. Sliding axis; 11. Elastic reset element; 111. Slider; 112. Limiting plate; 113. Limiting rod; 114. Spring. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1 - Appendix Figure 2 This application will be described in further detail.

[0036] This application discloses a mechanical chuck for disassembling electrode caps.

[0037] Reference Figure 1 A mechanical chuck for removing electrode caps includes a frame 1, a fixed plate 2 fixedly mounted on the frame 1, a fixed chuck 3 fixedly mounted on the fixed plate 2, a movable chuck 4 rotatably mounted on the fixed plate 2, an abutting elastic member 7 fixed on the fixed plate 2, a sensor 8 fixed on the fixed plate 2, a slide 9 fixed on the fixed plate 2, a sliding shaft 10 fixed on the frame 1, and an elastic reset member 11 disposed between the frame 1 and the fixed plate 2.

[0038] Reference Figure 2 The movable jaw 4 is mounted on the fixed plate 2 via a mounting shaft, allowing it to rotate. The abutting elastic element 7 is a torsion spring. A positioning post with the torsion spring is fixed on the fixed plate 2, and the torsion spring is inserted into and rotatably fixed to the positioning post. The torsion spring is located on one side of the movable jaw 4, and the abutting arm at one end of the torsion spring abuts against the movable jaw 4, providing abutting force. A clamping space 5 is formed between the fixed jaw 3 and the movable jaw 4 for holding the electrode cap. The robot places the electrode cap on the electrode rod into the clamping space 5. 4. Under the abutting force of the elastic member 7, the movable jaw 4 cooperates with the fixed jaw 3 to clamp the fixed electrode cap. Then, the robot moves the electrode rod, and the electrode cap is clamped by the fixed jaw 3 and the movable jaw 4, thus separating it from the electrode rod, completing the removal of the electrode cap. This solution can complete the removal of the electrode cap with a simple structure, is easy to install, and does not require system control. The sensor 8 is a photoelectric sensor located below the jaw. The photoelectric sensor can detect whether the electrode cap has been removed, so as to avoid the problem that subsequent processes cannot be carried out due to the electrode cap not being removed.

[0039] The fixed jaw 3 has serrations 6 fixed on its surface near the clamping space 5, and the movable jaw 4 also has serrations 6 fixed on its surface near the clamping space 5. The serrations 6 are integrally formed from the fixed jaw 3 and the movable jaw 4. The serrations 6 are oblique teeth, and the serrations 6 on the surfaces of the movable jaw 4 and the fixed jaw 3 face opposite directions. This prevents the electrode cap from slipping between the fixed jaw 3 and the movable jaw 4 during removal, thus preventing the electrode cap from being removed. The movable jaw 4 has a guide slope on its end face near the opening of the clamping space 5. Before the electrode cap enters the clamping area, it first comes into contact with the guide slope. The electrode cap pushes the movable jaw 4, making the clamping space 5 larger, causing the electrode cap in front to fall off automatically. The fixed jaw 3 also has a guide slope on its end face near the opening of the clamping space 5 to prevent the electrode cap from failing to enter the clamping space 5 due to the movement error of the robot arm. In this embodiment, there are two sets of fixed claws 3 and movable claws 4. Both sets of claws are fixed on the fixed plate 2. The openings of the clamping space 5 formed by the two sets of claws face opposite directions, and the serrations 6 on the surfaces of the two sets of claws are opposite. The positioning post is located between the two movable claws 4, and the abutting arms at both ends of the torsion spring abut against the movable claws 4 on both sides of the torsion spring respectively. The photoelectric sensor is located in the middle of the two sets of claws.

[0040] Reference Figure 3 The slide table 9 is welded and fixed to one side of the claw. The slide table 9 has a sliding hole through it. The axis of the sliding hole is perpendicular to the opening direction of the clamping space 5. The frame 1 is fixed with a sliding shaft 10. The sliding shaft 10 cooperates with the sliding hole of the slide table 9 to make the slide table 9 slide and fixed on the frame 1, that is, the fixing plate 2 is slidably fixed on the frame 1.

[0041] The elastic reset component 11 includes a slider 111, a limiting plate 112, a limiting rod 113, and a spring 114. The slider 111 is welded and fixed to the fixed plate 2, and the limiting plate 112 is welded and fixed to the frame 1 and perpendicular to the fixed plate 2. The limiting rod 113 passes through the slider 111 and slides with the slider 111. The spring 114 is sleeved on the limiting rod 113, with one end of the spring 114 abutting against the slider 111 and the other end of the spring 114 against the limiting plate. 112 Abutting; When the electrode cap is clamped and fixed by the claw, the fixing plate 2 slides through the sliding hole on the slide table 9 and cooperates with the sliding shaft 10 on the frame 1 to adjust the front and rear position of the claw, adapt to the position error of the robotic arm, and prevent the electrode rod end from being damaged by large stress; Then the slider 111 on the fixing plate 2 slides on the limit rod 113 to compress the spring 114, and the spring 114 provides a restoring force to the slider 111 to push the slider 111 and thus make the fixing plate 2 return to its original position.

[0042] A receiving slot is detachably installed on the frame 1. The receiving slot is located directly below the chuck to receive the dropped electrode caps.

[0043] The implementation principle of this embodiment is as follows: The robotic arm places the electrode cap on the electrode rod into the clamping space 5. The movable claw 4 is subjected to the abutting force of the elastic member 7. The movable claw 4 cooperates with the fixed claw 3 to clamp the fixed electrode cap. During this process, the fixed plate 2 slides through the sliding hole on the slide table 9 and cooperates with the sliding shaft 10 on the frame 1 to adjust the front and rear position of the claw, adapt to the position error of the robotic arm, and prevent the end of the electrode rod from being damaged by large stress. Then the robotic arm rotates the electrode rod so that the electrode cap is no longer clamped to the electrode rod. The electrode cap is clamped by the fixed claw 3 and the movable claw 4 and then separated from the electrode rod, completing the removal of the electrode cap. Then, before the next electrode cap enters the clamping area, it first abuts against the guide slope. The electrode cap pushes the movable claw 4 to make the clamping space 5 larger, causing the previously removed electrode cap to fall off automatically.

[0044] In summary, this solution allows for the removal of the electrode cap using a simple mechanical structure, making installation easy and requiring no system control.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A mechanical gripper for disassembling electrode caps, characterized in that, It includes a frame (1), a fixed plate (2) fixedly mounted on the frame (1), a fixed claw (3) fixedly mounted on the fixed plate (2), a movable claw (4) rotatably mounted on the fixed plate (2), and an abutting elastic member (7) close to the movable claw (4) and providing abutting force to the movable claw (4); a clamping space (5) for clamping the electrode cap is formed between the fixed claw (3) and the movable claw (4); the abutting elastic member (7) is mounted on the fixed plate (2).

2. The mechanical gripper for disassembling electrode caps according to claim 1, characterized in that, The fixed claw (3) and the movable claw (4) are both fixed with serrations (6) on the surface near the clamping space (5).

3. The mechanical gripper for disassembling electrode caps according to claim 2, characterized in that, The serrations (6) on the surfaces of the movable jaw (4) and the fixed jaw (3) are all helical teeth, and the serrations (6) on the surfaces of the movable jaw (4) and the fixed jaw (3) face opposite directions.

4. The mechanical gripper for disassembling electrode caps according to claim 3, characterized in that, The fixed jaws (3) and movable jaws (4) are provided in two sets. The openings of the clamping spaces (5) formed by the two sets of jaws face opposite directions, and the serrations (6) on the surfaces of the two sets of jaws face opposite directions.

5. A mechanical gripper for disassembling electrode caps according to claim 4, characterized in that, The abutting elastic element (7) is a torsion spring. The fixing plate (2) is fixed with a positioning post on which the torsion spring is sleeved. The positioning post is located between two movable claws (4). The abutting arms at both ends of the torsion spring abut against the movable claws (4) on both sides respectively.

6. A mechanical gripper for disassembling electrode caps according to claim 5, characterized in that, The fixed plate is equipped with a sensor (8) for detecting electrode caps. The sensor is a photoelectric sensor and is located in the middle of the two sets of claws.

7. A mechanical gripper for disassembling electrode caps according to claim 1, characterized in that, The movable claw (4) has a guide slope on the end face near the opening of the clamping space (5).

8. A mechanical gripper for disassembling electrode caps according to claim 1, characterized in that, The fixing plate (2) is slidably mounted on the frame (1) and perpendicular to the opening direction of the clamping space (5). An elastic reset member (11) providing reset force is provided between the fixing plate (2) and the frame (1).

9. A mechanical gripper for disassembling electrode caps according to claim 2, characterized in that, A slide (9) is fixed on the fixed plate (2), and a sliding hole is provided through the slide (9). The axis of the sliding hole is perpendicular to the opening direction of the clamping space (5). A sliding shaft (10) is fixed on the frame (1) and slides in cooperation with the sliding hole of the slide (9). The fixed plate (2) is slidably fixed on the frame (1) through the cooperation of the slide (9) and the sliding shaft (10). The elastic reset member (11) includes a spring (114) and a limiting rod (115). 113), a limiting plate (112) and a slider (111), wherein the slider (111) is fixed on the fixing plate (2), the limiting plate (112) is fixed on the frame (1), the limiting rod (113) passes through the slider (111) and the limiting plate (112) and slides with both, and the spring (114) is sleeved on the limiting rod (113) and abuts between the slider (111) and the limiting plate (112).

10. A mechanical gripper for disassembling electrode caps according to claim 1, characterized in that, The frame (1) is detachably equipped with a receiving groove, which is located directly below the claw to receive the dropped electrode cap.

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