Formation nail pulling device

Abstract

The invention relates to the technical field of nail pulling devices, and discloses a formation nail pulling device which comprises a control cylinder body, a clamping jaw assembly, a control head, a mounting base, an isolation hood and a control mechanism, the isolation hood is arranged at one end of a control cylinder shell, the interior of the isolation hood is hollow to form a movable cavity, and the mounting base is slidably arranged in the movable cavity; the clamping jaw assembly is composed of at least two clamping jaws and rotationally arranged on the mounting base, the control mechanism can control the control head and the mounting base to move, the nail pulling device has three working states, and the control mechanism can control the nail pulling device to be switched among the three states; the isolation cover is provided with a liquid discharge hole. The control cylinder body is provided with an air inlet. According to the formation nail pulling device, the nail pulling operation of formation nails can be effectively achieved, and meanwhile the isolation cover can effectively prevent electrolyte from polluting the environment in the nail pulling process.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of nail pulling devices, and in particular to a formation nail pulling device. BACKGROUND

[0002] With the vigorous development of the new energy industry, lithium batteries, as the main energy carrier, have become the core link of promoting energy transformation and the development of the electric vehicle industry. With the continuous expansion of the global new energy vehicle market, the demand for power batteries has surged, driving the lithium battery manufacturing technology to evolve rapidly towards high precision, automation and green.

[0003] In the production process of the battery, multiple key processes such as electrode preparation, cell assembly and liquid injection formation are involved. After the formation process is completed, the formation nails on the battery need to be pulled out in order to proceed with the subsequent processes. For the pulling out of the formation nails, the commonly used nail pulling device is the jaw assembly composed of a clamping cylinder 471 and a clamping finger 472 used in the "Square cell formation nail automatic removal equipment" of Chinese patent for invention with announcement number CN115472888A.

[0004] In view of the related technology in the above, when the formation nails are pulled out, the pressure difference is formed in the internal channel of the formation nails at the moment of pulling out, and the residual electrolyte is sprayed in the form of high-speed jet, which can cause pollution to the environment. SUMMARY

[0005] In order to prevent the splashing electrolyte from polluting the environment when the nails are pulled out, the application provides a formation nail pulling device.

[0006] The application provides a formation nail pulling device, which adopts the following technical scheme: A formation nail pulling device, comprising a control cylinder body, a jaw assembly, a control head, a mounting seat, an isolation cover and a control mechanism; The isolation cover is arranged at one end of the control cylinder body, the control cylinder body and the isolation cover are hollow inside to form a movable cavity, one end of the isolation cover away from the control cylinder body is provided with a feeding hole for inserting the formation nail, the feeding hole is in communication with the movable cavity, the mounting seat is slidingly arranged in the movable cavity, the mounting seat is provided with a through hole for the control head to pass through, the jaw assembly is composed of at least two jaws, all the jaws are circumferentially arranged along the center axis of the through hole and are rotationally arranged on the mounting seat; The jaw comprises a control section, a transition section and a clamping section connected in sequence, the transition section is concave on one side facing the through hole to form an inner concave surface, the inner concave surfaces of all the jaws enclose to form a control groove for the control head to slide, and the control mechanism can control the control head and the mounting seat to move towards or away from the isolation cover; The nail pulling device has three working states, The first state: the control head moves to abut against the clamping section of the clamping jaw, the clamping jaw assembly is opened, and the mounting seat moves to abut against the bottom wall of the movable cavity close to the inlet hole; The second state: the control head moves to abut against the control section of the clamping jaw, the clamping jaw assembly is closed, and the mounting seat still abuts against the bottom wall of the movable cavity close to the inlet hole; The third state: the control head keeps abutting against the control section of the clamping jaw, the clamping jaw assembly is closed, and the mounting seat moves away from the inlet hole.

[0007] By using the above technical scheme, the control mechanism is used to control the movement of the control head and the mounting seat, so that the clamping jaw assembly is opened and closed, and then the clamping and pulling actions of the formed nails are completed. Compared with the traditional clamping jaw, the clamping jaw assembly has a smaller volume, and an isolation cover can be arranged outside the clamping jaw. The high-speed jet of residual electrolyte sprayed out at the moment of pulling out the formed nail can be prevented from polluting the environment by the isolation cover.

[0008] Optionally, the isolation cover is provided with a liquid discharge hole along the radial direction, one end of the liquid discharge hole extends outward and is connected with a liquid suction device, the other end extends inward and is in communication with the movable cavity, and the mounting seat has a spacing between the outer side wall and the inner side wall of the movable cavity.

[0009] By using the above technical scheme, in the process of pulling out the nail, the liquid discharge hole connected with the liquid suction device can suck away the residual electrolyte sprayed out of the formed nail, reducing the possibility of corrosion to the nail pulling device. The spacing between the outer side wall of the mounting seat and the inner side wall of the movable cavity provides a channel for the discharge of electrolyte, further ensuring the liquid discharge effect.

[0010] Optionally, the control cylinder body is provided with a first air inlet hole and a second air inlet hole spaced apart along the radial direction, and the control mechanism comprises a control inner cylinder and a piston rod coaxially nested; The control inner cylinder is slidingly arranged in the control cylinder body, and the proximal end thereof is connected with the mounting seat to drive the movement of the mounting seat; the piston rod is slidingly arranged in the control inner cylinder, and the proximal end thereof is connected with the control head to drive the movement of the control head; The control cylinder body and the control inner cylinder form a first cavity and a second cavity, the control inner cylinder is provided with a second partition ring on the outer side wall thereof, the first cavity is located at the distal end of the second partition ring, the second cavity is located at the proximal end of the second partition ring, and the cross section of the first cavity is larger than that of the second cavity; The control inner cylinder and the piston rod form a third cavity and a fourth cavity between them, a sixth separation ring is arranged on the outer wall of the control inner cylinder, the third cavity is located at the distal end of the sixth separation ring, the fourth cavity is located at the proximal end of the sixth separation ring, and the cross section of the fourth cavity is larger than that of the third cavity; the first cavity and the third cavity are in communication with the first gas inlet hole; and the second cavity and the fourth cavity are in communication with the second gas inlet hole.

[0011] By adopting the technical scheme, in the formed nail pulling device, the control cylinder body is provided with the first gas inlet hole and the second gas inlet hole, and cooperates with the control mechanism composed of the coaxially nested control inner cylinder and the piston rod to control the movement of the control head and the mounting seat towards the direction of approaching or moving away from the isolation cover, so that the switching of the three working states of the pulling device is realized, and the formed nail is convenient to clamp and pull out; the control cylinder body, the control inner cylinder and the piston rod form cavities with different cross sections and are in communication with the corresponding gas inlet holes, so that the movement of the control head and the mounting seat can be accurately controlled by using the pressure difference, and the operation accuracy and stability of the pulling device are improved.

[0012] Optionally, the control cylinder body is provided with a proximity switch at the distal end, the space where the proximity switch is located is in communication with the internal space of the control inner cylinder, and the piston rod is provided with a feedback member at the distal end, when the piston rod moves to the closing of the jaw assembly, the feedback member triggers the proximity switch.

[0013] By adopting the technical scheme, the proximity switch can be triggered by the feedback member when the jaw assembly is closed, so that the closing state of the jaw assembly can be fed back by the proximity switch, and the working state of the device is convenient to monitor and control.

[0014] Optionally, the feedback member includes a feedback rod and a feedback spring, the piston rod is provided with an anti-disengagement member at the distal end, the fifth separation ring is coaxially arranged on the outer wall of the piston rod, the feedback rod is provided with a clearance slot for sliding of the anti-disengagement member at the proximal end, the distal end of the piston rod penetrates through the feedback rod and is connected with the anti-disengagement member, and the feedback spring is coaxially sleeved on the piston rod, one end of the feedback spring abuts against the end face of the feedback rod, and the other end abuts against the end face of the fifth separation ring.

[0015] By adopting the technical scheme, the feedback rod and the feedback spring of the feedback member cooperate, when the piston rod moves to close the jaw assembly, the feedback rod triggers the proximity switch, and the closing state of the jaw assembly can be accurately fed back; the anti-disengagement member can prevent the feedback rod from disengaging from the piston rod, and the stability of the feedback member structure is ensured; the fifth separation ring provides support for the feedback spring, and ensures the normal work of the feedback spring; the clearance slot enables the anti-disengagement member to slide in the feedback rod, and realizes the flexible movement of the feedback rod.

[0016] Optionally, a clamping section of the clamping jaw is provided with a clamping groove on a side facing the control groove, and the formed nail end is provided with a protruding part, and the clamping groove and the protruding part of the formed nail are matched in shape.

[0017] By using the above technical scheme, the clamping groove of the clamping jaw and the protruding part of the formed nail end are matched in shape, so that the clamping jaw assembly can more stably clamp the formed nail, and the stability of the nail pulling process is improved.

[0018] Optionally, the control head is provided with an ejection part at one end facing the feeding hole, and when the side wall of the control head abuts against the clamping section of the clamping jaw, the ejection part abuts against the end surface of the formed nail.

[0019] By using the above technical scheme, when the side wall of the control head abuts against the clamping section of the clamping jaw, the ejection part abuts against the end surface of the formed nail, so that the formed nail can be ejected during nail pulling, and the nail pulling operation can be smoothly completed.

[0020] Optionally, the clamping jaw is made of a material resistant to electrolyte corrosion.

[0021] By using the above technical scheme, during the pulling out of the formed nail, the clamping jaw will not be corroded by contacting the electrolyte, so that the normal work of the clamping jaw assembly is ensured, and the service life of the clamping jaw is prolonged.

[0022] Optionally, a protective cover is detachably arranged at one end of the isolation cover away from the control cylinder body.

[0023] By using the above technical scheme, the protective cover is detachably arranged at one end of the isolation cover away from the control cylinder body, so that the isolation cover can be protected during nail pulling, and damage to the isolation cover is avoided, and the protective cover is detachable for replacement and maintenance.

[0024] Optionally, the protective cover is made of elastic material.

[0025] By using the above technical scheme, when the nail pulling device abuts against the lithium battery, the protective cover made of elastic material can play a buffering role, so that damage to the lithium battery is avoided.

[0026] In summary, the present application has at least one of the following beneficial effects: 1. By the special arrangement and control mode of the clamping jaw assembly, the isolation cover can be arranged outside the clamping jaw assembly, and the position of the formed nail can be isolated by the isolation cover during nail pulling, so that the electrolyte is prevented from being sprayed out to pollute the environment during nail pulling; 2. By arranging the liquid discharge hole, the electrolyte in the nail pulling device can be discharged in time; 3. By arranging the multiple cavities, the air inlet of the first air hole and the second air hole can be controlled in turn to realize the switching of the nail pulling device in three states and complete the nail pulling process. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic diagram of an embodiment of the present application; Figure 2 is a sectional structural schematic diagram in a first state; Figure 3 is an exploded structural schematic diagram of an embodiment of the present application; Figure 4 is Figure 2 is an enlarged structural schematic diagram at A in FIG. 6; Figure 5 is a sectional structural schematic diagram in a second state; Figure 6 is a sectional structural schematic diagram in a third state; Figure 7 is a sectional structural schematic diagram of a first connecting channel; Figure 8 is a sectional structural schematic diagram of a second connecting channel; Reference Signs: 1, control cylinder body; 11, movable cavity; 12, first air inlet hole; 13, second air inlet hole; 14, first partition ring; 15, first connecting channel; 16, second connecting channel; 2, clamping jaw assembly; 21, clamping jaw; 211, control section; 212, transition section; 213, clamping section; 214, clamping groove; 22, control groove; 3, control head; 31, ejection portion; 4, mounting seat; 5, isolation cover; 51, material inlet hole; 52, liquid discharge hole; 6, control mechanism; 601, first cavity; 602, second cavity; 603, third cavity; 604, fourth cavity; 605, first transition cavity; 606, second transition cavity; 607, first communication hole; 608, second communication hole; 61, control inner cylinder; 611, first stepped ring; 612, second stepped ring; 613, third stepped ring; 614, second partition ring; 615, third partition ring; 616, fourth partition ring; 617, blocking ring; 62, piston rod; 621, fifth partition ring; 622, sixth partition ring; 7, proximity switch; 8, feedback member; 81, feedback rod; 811, anti-dropping member; 82, feedback spring; 9, protective cover. DETAILED DESCRIPTION

[0028] The following will be described in detail below in combination with the accompanying Figures 1-8 The present application will be further described in detail.

[0029] Embodiment 1 An embodiment of the present application discloses a formation nail pulling device. Referring to Figure 1 and Figure 2The nail pulling device comprises a control cylinder body 1, a clamping jaw assembly 2, a control head 3, a mounting seat 4, an isolation cover 5 and a control mechanism 6. The isolation cover 5 is arranged at one end of the control cylinder body 1. The control cylinder body 1 and the isolation cover 5 are hollow inside to form a movable cavity 11. An inlet hole 51 for inserting the formed nail is arranged at the end of the isolation cover 5 away from the control cylinder body 1. The inlet hole 51 is in communication with the movable cavity 11. The mounting seat 4 is slidingly arranged in the movable cavity 11. A through hole is arranged on the mounting seat 4 for the control head 3 to pass through. The clamping jaw assembly 2 is composed of at least two clamping jaws 21. All the clamping jaws 21 are circumferentially arranged along the central axis of the through hole and are rotatably arranged on the mounting seat 4. The control mechanism 6 can control the movement of the control head 3 and the mounting seat 4 towards or away from the isolation cover 5. When the control head 3 moves along the extension direction of the through hole, the clamping jaw assembly 2 can be controlled to open or close.

[0030] When pulling the nail, the nail pulling device is controlled to approach the lithium battery, and the formed nail is aligned and inserted into the inlet hole 51 of the isolation cover 5. The control mechanism 6 drives the control head 3 and the mounting seat 4 to move, thereby controlling the action of the clamping jaw assembly 2 to realize the function of pulling the nail. Since the pulling process is carried out in the isolation cover 5, the electrolyte generated in the pulling moment is isolated by the isolation cover 5 and will not pollute the external environment.

[0031] For the convenience of understanding, the end close to the inlet hole 51 is referred to as the proximal end, and the end away from the inlet hole 51 is referred to as the distal end.

[0032] Referring to Figure 2 and Figure 3 Specifically, four clamping jaws 21 are arranged in the embodiment. Rectangular grooves for mounting the clamping jaws 21 are circumferentially arranged on the inner side wall of the mounting seat 4. A cylindrical rotating shaft can be arranged on the mounting seat 4. The rotating shaft is parallel to the axis direction of the inlet hole 51 and penetrates the clamping jaws 21 to realize the rotating installation of the clamping jaws 21. The clamping jaws 21 are generally made of materials resistant to electrolyte corrosion, such as stainless steel, titanium alloy, etc., which do not contain copper and zinc elements, so as to reduce the possibility of being corroded by the electrolyte and improve the service life of the device.

[0033] Referring to Figure 3 and Figure 4, the clamping jaw 21 comprises a control section 211, a transition section 212 and a clamping section 213 connected in sequence, a rotating shaft for installing the clamping jaw 21 passes through the transition section 212 of the clamping jaw 21, so that the control section 211 and the clamping section 213 of the clamping jaw 21 form a lever structure with the rotating shaft as a fulcrum. The transition section 212 is concave towards the side of the through hole to form an inner concave surface, and the inner concave surfaces of all the clamping jaws 21 surround to form a control groove 22 in which the control head 3 can slide left and right. By controlling the movement of the control head 3, the side wall of the control head 3 abuts against the control section 211 or the clamping section 213, so that the opening and closing actions of the clamping jaw 21 can be realized. This special structure design can design the clamping jaw assembly 2 to be small in size. In this embodiment, the clamping section 213 of the clamping jaw 21 is designed as a rectangular rod structure as a whole, so that the clamping jaw assembly 2 is small in size, and in the nail pulling process, the isolation cover 5 can be conveniently arranged outside the clamping jaw 21, and the operation precision can be improved.

[0034] In the embodiments of the present application, referring to Figure 2 , Figure 5 and Figure 6 , the nail pulling device has three working states, The first state: the control mechanism 6 drives the control head 3 to move towards the inlet hole 51, that is, to move towards the proximal end to abut against the clamping section 213 of the clamping jaw 21, so that the clamping section 213 is turned outward, and the clamping jaw assembly 2 is opened; at the same time, the mounting seat 4 moves to abut against the proximal end bottom wall of the movable cavity 11, and at this time, the clamping jaw assembly 2 is located closest to the inlet hole 51; When the nail pulling device is controlled to be close to the formed nail during the nail pulling process, and the end surface of the isolation cover 5 abuts against the surface of the lithium battery, the formed nail is inserted into the middle of the four clamping jaw assemblies 2; when the nail pulling device is controlled to move to the discharging position during the discharging process, the clamping jaw 21 is opened, so that the formed nail falls from the clamping jaw 21, and the discharging process is completed.

[0035] The second state: the control mechanism 6 drives the control head 3 to move towards the distal end to abut against the control section 211 of the clamping jaw 21, so that the control section 211 is turned outward, and the clamping section 213 is turned inward, so that the clamping jaw assembly 2 is closed and the formed nail is clamped; at this time, the mounting seat 4 still abuts against the proximal end bottom wall of the movable cavity 11, and the position of the clamping jaw 21 along the axis direction is unchanged; this arrangement can ensure that the clamping process is stable and accurate.

[0036] The third state: the control head 3 remains in the state of abutting against the control section 211 of the clamping jaw 21, that is, the clamping jaw assembly 2 is in the closed state; the control mechanism 6 controls the mounting seat 4 to move towards the distal end to drive the formed nail to move away from the lithium battery, so that the nail is pulled out; at the same time, at this time, the isolation cover 5 is still arranged outside the formed nail to avoid that the electrolyte is splashed to the outside during the nail pulling process.

[0037] During the whole process of pulling out the nail, the nail pulling device goes through the alignment of the nail in the first state, the clamping of the nail in the second state, the pulling out of the nail in the third state, and the release of the nail in the first state, which realizes the pulling out of the nail.

[0038] With reference to Figure 4 Further, the clamping jaw 21 is provided with a clamping groove 214 on the side of the clamping section 213 facing the control groove 22, and the nail end is provided with a protruding part in the form of a circular ring, and the clamping groove 214 is matched with the shape of the protruding part of the nail, so that the clamping grooves 214 on the four clamping jaws 21 can better clamp the nail during the pulling out of the nail, thereby improving the stability of the pulling out of the nail.

[0039] With reference to Figure 4 Further, the control head 3 is provided with an ejection part 31 at the end facing the feeding hole 51, which can be in the form of a cylinder, a rectangle or the like, and when the side wall of the control head 3 abuts against the clamping section 213 of the clamping jaw 21, the ejection part 31 abuts against the end face of the nail, which helps to better discharge the nail after the pulling out of the nail is completed, thereby preventing the nail from being clamped on the clamping jaw 21. It should be noted that when the clamping jaw 21 is folded down by the abutment of the control head 3, there is a gap between the side wall of the control head 3 and the side wall of the clamping jaw 21.

[0040] With reference to Figure 1 and Figure 4 In an optional embodiment, the isolation cover 5 is provided with a liquid discharge hole 52 extending along the radial direction, one end of the liquid discharge hole 52 extends outwardly and is connected to a liquid suction device, and the other end extends inwardly and is connected to the movable cavity 11, and there is a gap between the outer side wall of the mounting seat 4 and the inner side wall of the movable cavity 11, so that the liquid in the movable cavity 11 can be discharged in time after the pulling out of the nail is completed, thereby reducing the possibility of corrosion of the internal structure by the electrolyte, and the clamping jaw 21 can also be cleaned in time to avoid secondary pollution. Preferably, a plurality of liquid suction holes can be provided to improve the suction effect. The liquid suction device mainly comprises a pipeline connected to the liquid discharge hole 52 Figure 1 and Figure 4 , and a suction pump for providing suction.

[0041] In an optional embodiment, a protective cover 9 made of elastic material such as rubber or the like is detachably arranged at the end of the isolation cover 5 away from the control cylinder body 1, and the protective cover 9 is arranged on the outer surface of the isolation cover 5, which can play a buffering role when abutting against the surface of the lithium battery, thereby protecting the nail pulling device and the lithium battery.

[0042] With reference to Figure 2 and Figure 6In the embodiment of the present application, the control mechanism 6 comprises a control inner cylinder 61 and a piston rod 62. The control inner cylinder 61 is coaxially and slidably arranged in the control cylinder body 1, and the proximal end of the control inner cylinder 61 is connected with the mounting seat 4. When the control inner cylinder 61 moves left and right along the length direction of the control cylinder body 1, the mounting seat 4 can be synchronously moved left and right, i.e. the clamping jaw assembly 2 is moved left and right. The piston rod 62 is coaxially and slidably arranged in the control inner cylinder 61, and the proximal end of the piston rod 62 is connected with the control head 3. When the piston rod 62 moves left and right, the control head 3 can be moved left and right.

[0043] The control inner cylinder 61 and the mounting seat 4 can be connected and synchronized by bolts, pins and the like. In the embodiment of the present application, a first linkage ring is arranged on the inner side wall of the mounting seat 4, and a first linkage groove is formed on the outer side wall of the proximal end of the control inner cylinder 61. The first linkage ring is clamped in the first linkage groove, so that the control inner cylinder 61 can drive the mounting seat 4 to slide.

[0044] The distal end of the piston rod 62 is slidably arranged in the control inner cylinder 61, and the proximal end is fixedly connected with the piston rod 62 by integral molding or the like.

[0045] Referring to Figure 2 and Figure 6 In the embodiment of the present application, a first separation ring 14 is fixedly arranged on the inner side wall of the control cylinder body 1 by integral molding or the like. The inner side wall of the first separation ring 14 abuts against the inner side wall of the control inner cylinder 61. Preferably, a sealing ring can be embedded in the inner wall of the first separation ring 14 to increase the sealing property between the outer wall of the control inner cylinder 61 and the first separation ring 14.

[0046] In the embodiment of the present application, the control inner cylinder 61 is outwardly and stepwise bent twice along the direction from the distal end to the proximal end, forming three step rings connected in sequence, which are a first step ring 611, a second step ring 612 and a third step ring 613 along the direction from the distal end to the proximal end, and the outer diameters of the three step rings gradually increase. The inner wall of the first separation ring 14 abuts against the outer wall of the second step ring 612.

[0047] The control inner cylinder 61 is fixed with a second partition ring 614, a third partition ring 615 and a fourth partition ring 616 on the outer side wall. The second partition ring 614 is arranged between the first stepped ring 611 and the second stepped ring 612, that is, it can be arranged on the outer side wall near the first stepped ring 611 or on the outer side wall far from the second stepped ring 612. In the embodiment, the second partition ring 614 is arranged near the first partition ring 14, and is clamped and fixed between the positioning piece and the far end surface of the second stepped tube by being locked by the positioning piece. The third partition ring 615 and the fourth partition ring 616 are fixed on the outer side wall of the third stepped ring 613 by integral molding or welding. The second transition cavity 606 is formed between the third partition ring 615 and the fourth partition ring 616. Correspondingly, a sealing ring can be arranged on the outer side wall of the second partition ring 614, the third partition ring 615 and the fourth partition ring 616 to increase the sealing between the inner wall of the control cylinder.

[0048] The first cavity 601 is formed between the far end surface of the control cylinder body 1, the far end surface of the second partition ring 614, the outer side wall of the first stepped ring 611 and the inner wall of the control cylinder body 1. The second cavity 602 is formed between the near end surface of the second partition ring 614, the outer side wall of the second stepped ring 612, the far end surface of the first partition ring 14 and the inner wall of the control cylinder body 1. The first transition cavity 605 is formed between the near end surface of the first partition ring 14, the outer side wall of the second stepped ring 612, the far end surface of the third partition ring 615 and the inner wall of the control cylinder body 1. In the above cavities, it can be known from the drawings that the cross section of the first cavity 601 is larger than that of the second cavity 602.

[0049] Referring to Figure 2 and Figure 6 The fifth partition ring 621 is fixed on the outer side wall of the piston rod 62. The fixing mode of the fifth partition ring 621 is not limited, and it can also be connected by welding, bolt connection and the like. In the embodiment, the connection between the piston rod 62 and the fifth partition ring 621 is realized by arranging a pin shaft between the fifth partition ring 621 and the piston rod 62. The sixth partition ring 622 is integrally formed on the near end of the fifth partition ring 621. The outer wall of the far end of the fifth partition ring 621 abuts against the inner wall of the second stepped ring 612, and a sealing ring is arranged on the outer wall of the abutting portion of the fifth partition ring 621. The outer wall of the sixth partition ring 622 abuts against the inner wall of the third stepped ring 613. The third stepped ring 613 is fixed with a blocking ring 617 for providing sealing. The inner wall of the blocking ring 617 abuts against the outer wall of the piston rod 62, and a sealing ring is embedded on the inner wall of the blocking ring 617.

[0050] The third cavity 603 is formed between the proximal end face of the second stepped ring 612, the inner wall of the third stepped ring 613, the distal end face of the sixth partition ring 622 and the outer wall of the fifth partition ring 621; the first communication hole 607 and the second communication hole 608 are arranged on the third stepped ring 613, and the first transition cavity 605 and the third cavity 603 are connected through the first communication hole 607. The fourth cavity 604 is formed between the proximal end face of the fifth partition ring 621, the outer wall of the piston rod 62, the distal end face of the stop ring 617 and the inner wall of the third stepped ring 613, and the second transition cavity 606 and the fourth cavity 604 are connected through the second communication hole 608. In the above-mentioned cavities, it can be known from the drawings that the cross section of the fourth cavity 604 is larger than that of the third cavity 603.

[0051] In combination with Figure 7 and Figure 8 In the embodiment of the present application, the first air inlet hole 12 and the second air inlet hole 13 are arranged on the control cylinder body 1 and spaced apart along the radial direction, and the first connecting channel 15 and the second connecting channel 16 are also arranged on the control cylinder body 1 and spaced apart along the axial direction. One end of the first air inlet hole 12 extends to the outer wall of the control cylinder body 1, and the other end is connected with the first cavity 601; the first cavity 601 and the first transition cavity 605 are connected through the first connecting channel 15; since the first transition cavity 605 is connected with the third cavity 603, the first cavity 601 and the third cavity 603 are both connected with the first air inlet hole 12. One end of the second air inlet hole 13 extends to the outer wall of the control cylinder body 1, and the other end is connected with the second cavity 602; the second cavity 602 and the second transition cavity 606 are connected through the second connecting channel 16; since the second transition cavity 606 is connected with the fourth cavity 604, the second cavity 602 and the fourth cavity 604 are both connected with the second air inlet hole 13.

[0052] In the embodiment of the present application, in order to control the movement of the control head 3 and enable the nail pulling device to switch among the three states, an external control device is connected, which can be a three-position five-way valve (not shown in the figure) of medium pressure type or medium sealing type, and the medium sealing type is preferred. The three-position five-way valve is a standard pneumatic control element widely used in the field, and in order to facilitate understanding, the device is briefly introduced as follows: it usually has five interfaces: a gas source port (P), a first working port (A), a second working port (B), a first exhaust port (T1) and a second exhaust port (T2); in the present application, the first working port is connected with the first air inlet hole 12, and the second working port is connected with the second air inlet hole 13.

[0053] The three-position five-way valve has three working positions: The first working position (left position): P port communicates with A port, B port communicates with T2 port, at this time, the first inlet hole 12 is supplied with gas, and the second inlet hole 13 is exhausted; correspondingly, the first cavity 601 is supplied with gas, the second cavity 602 is exhausted, the second separation ring 614 is driven to move towards the second cavity 602, thereby driving the control inner cylinder 61 and the mounting seat 4 to move towards the proximal end, so that the end surface of the mounting seat 4 abuts against the proximal end surface of the movable cavity 11; at the same time, the third cavity 603 is supplied with gas, the fourth cavity 604 is exhausted, the sixth separation ring 622 is driven to move towards the fourth cavity 604, thereby driving the piston rod 62 and the control head 3 to move towards the proximal end, so that the side wall of the control head 3 abuts against the clamping section 213 of the clamping jaw 21; correspondingly, at this time, the clamping jaw assembly 2 is opened, and the nail pulling device is in the first state.

[0054] The second working position (middle position): when the middle sealing type is adopted, the A port and the B port are both closed, and the gas pressure is kept in the state of power off; since the cross section of the first cavity 601 is larger than that of the second cavity 602, the second separation ring 614 is stationary, since the cross section of the fourth cavity 604 is larger than that of the third cavity 603, the sixth separation ring 622 moves towards the third cavity 603, thereby driving the piston rod 62 and the control head 3 to move towards the distal end, so that the side wall of the control head 3 abuts against the control section 211 of the clamping jaw 21, and the clamping jaw assembly 2 is closed; correspondingly, at this time, the nail pulling device is in the second state. As an example, when the middle pressure type is adopted, the P port continuously supplies gas to the A / B port, and the exhaust port is closed; still, the second separation ring 614 is stationary, and the sixth separation ring 622 moves towards the third cavity 603.

[0055] The third working position (right position): P port communicates with B port, A port communicates with T1 port, at this time, the second inlet hole 13 is supplied with gas, and the first inlet hole 12 is exhausted; correspondingly, the first cavity 601 is exhausted, the second cavity 602 is supplied with gas, the second separation ring 614 is driven to move towards the first cavity 601, thereby driving the control inner cylinder 61 and the mounting seat 4 to move towards the distal end; at the same time, the third cavity 603 is exhausted, the fourth cavity 604 is supplied with gas, the sixth separation ring 622 is driven to move towards the third cavity 603, and moves relatively with the control inner cylinder 61, thereby making the side wall of the control head 3 always abut against the clamping section 213 of the clamping jaw 21; correspondingly, at this time, the clamping jaw assembly 2 is closed, and the nail pulling device is in the third state.

[0056] The implementation principle of the forming nail pulling device in the embodiment of the application is as follows: through cooperation of the isolation cover 5 and the liquid discharge hole 52, pollution of electrolyte to the environment is avoided, and electrolyte in the isolation cover 5 can be discharged in time, thereby prolonging the service life of the device; through control of the control mechanism 6 on movement of the control head 3 and the mounting seat 4, the pulling device can be flexibly switched among three states, and the pulling process of the forming nail is realized. In the control mechanism 6, different cavities are formed by the control inner cylinder 61 and the piston rod 62, and the unique multi-cavity structure enables the pulling device to be switched among three working states through one external three-position five-way valve; the problems that the traditional pulling device is difficult to stably switch among multiple states, the clamping jaw 21 is large in size, and the action is not accurate, and the pulling requirement is difficult to meet are solved, the efficiency and quality of the pulling operation are improved, and the present application has been significantly improved and promoted compared with the prior art.

[0057] Embodiment 2 The difference between the embodiment and the embodiment 1 is that the control cylinder body 1 is provided with a proximity switch 7 at the far end. Figure 2 and Figure 5 The space where the proximity switch 7 is located is in communication with the inner space of the control inner cylinder 61, and the piston rod 62 is provided with a feedback piece 8 at the far end. Specifically, the rear cover can be detachably fixed at the far end of the control cylinder body 1 by means of bolts or the like, and the proximity switch 7 is installed and arranged at the center of the rear cover. The feedback piece 8 includes a feedback rod 81 and a feedback spring 82, the piston rod 62 is provided with an anti-disengagement piece 811 at the far end, the anti-disengagement piece 811 can be arranged as a rectangular ring with a larger outer diameter than the piston rod 62, or as a block structure embedded on the outer wall of the end portion of the piston rod 62, the feedback rod 81 is provided with a clearance groove for sliding of the anti-disengagement piece 811 at the proximal end, and the end portion of the piston rod 62 penetrates through the feedback rod 81 and is connected with the anti-disengagement piece 811. Preferably, in order to avoid that the pressure in the feedback rod 81 affects the movement of the piston rod 62, the side wall of the feedback rod 81 is provided with a radial hole, so that the clearance groove is in communication with the tail space of the control inner cylinder 61, and a sealing ring is arranged between the tail of the control inner cylinder 61 and the control cylinder body 1 to ensure the sealing property of the first cavity 601, and the tail space of the control inner cylinder 61 can be in communication with the outside. Through the above structure, the piston rod 62 can be slidably inserted into the feedback rod 81.

[0058] Further, the feedback spring 82 is coaxially sleeved on the piston rod 62, one end of the feedback spring 82 abuts against the proximal end face of the feedback rod 81, and the other end abuts against the end face of the fifth partition ring 621.

[0059] Referring to Figure 5When the second state, the piston rod 62 drives the control head 3 to move to the far end to the pinch jaw assembly 2, the feedback piece 8 triggers the proximity switch 7. Because in the process of moving the piston rod 62, the feedback rod 81 will move with the piston rod 62 under the elastic force of the feedback spring 82, when the pinch jaw assembly 2 is closed, the feedback rod 81 moves to a certain position, so that the feedback piece 8 can trigger the proximity switch 7, the proximity switch 7 can transmit a signal to other devices, that is, transmit a signal that the formed nails have been clamped, realize the monitoring and feedback of the state of the nail pulling device, facilitate the automatic control and operation, and improve the intelligent degree and operation accuracy of the device.

[0060] With reference to Figure 6 When the third state, the mounting seat 4 drives the pinch jaw assembly 2 to move synchronously to the far end, and performs nail pulling, the feedback rod 81 abuts on the proximity switch 7, at this time the piston rod 62 can still slide freely in the compression feedback spring 82 and the relief groove, when the nail pulling device changes from the third state to the first state, the feedback rod 81 recovers to the original state under the action of the feedback spring 82.

[0061] The implementation principle of the embodiment is: by setting the proximity switch 7 and the feedback piece 8, the real-time monitoring and feedback of the state of the pinch jaw assembly 2 are realized. When the pinch jaw assembly 2 reaches the closed state, the feedback piece 8 can trigger the proximity switch 7 in time, and the state information is transmitted out, which is convenient for the operator to understand the working condition of the device, and also provides the possibility for automatic production, and further improves the performance and adaptability of the nail pulling device The above are preferred embodiments of the present application, and are not limited to the protection scope of the present application, therefore: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A device for removing formed nails, characterized in that: It includes a control cylinder body (1), a gripper assembly (2), a control head (3), a mounting base (4), an isolation cover (5), and a control mechanism (6); The isolation cover (5) is disposed at one end of the control cylinder body (1). The control cylinder body (1) and the isolation cover (5) are hollow to form a movable cavity (11). The isolation cover (5) is provided with a feed hole (51) for inserting chemical nails at one end away from the control cylinder body (1). The feed hole (51) is connected to the movable cavity (11). The mounting base (4) is slidably disposed in the movable cavity (11). The mounting base (4) is provided with a through hole for the control head (3) to pass through. The gripper assembly (2) is composed of at least two grippers (21). All grippers (21) are arranged circumferentially along the central axis of the through hole and are rotatably disposed on the mounting base (4). The gripper (21) includes a control section (211), a transition section (212) and a clamping section (213) connected in sequence. The transition section (212) is recessed on one side facing the through hole to form a concave surface. The concave surfaces of all the grippers (21) surround to form a control groove (22) for the control head (3) to slide. The control mechanism (6) can control the control head (3) and the mounting base (4) to move toward or away from the isolation cover (5). The nail-pulling device has three working states. First state: The control head (3) moves to abut against the clamping section (213) of the gripper (21), the gripper assembly (2) opens, and the mounting base (4) moves to abut against the bottom wall of the movable cavity (11) near the feed hole (51); Second state: The control head (3) moves to abut against the control section (211) of the gripper (21), the gripper assembly (2) closes, and the mounting base (4) still abuts against the bottom wall of the active cavity (11) near the feed hole (51); Third state: The control head (3) remains in contact with the control section (211) of the gripper (21), the gripper assembly (2) closes, and the mounting base (4) moves away from the feed hole (51).

2. The nail-removing device according to claim 1, characterized in that: The isolation cover (5) has a drain hole (52) along the radial direction. One end of the drain hole (52) extends outward and is connected to the liquid suction device, and the other end extends inward and is connected to the movable cavity (11). There is a gap between the outer wall of the mounting base (4) and the inner wall of the movable cavity (11).

3. The nail-removing device according to claim 2, characterized in that: The control cylinder body (1) is provided with a first air inlet (12) and a second air inlet (13) spaced apart along the radial direction. The control mechanism (6) includes a control inner cylinder (61) and a piston rod (62) arranged coaxially. The inner control cylinder (61) is slidably disposed within the control cylinder body (1), and its proximal end is connected to the mounting base (4) to drive the mounting base (4) to move; the piston rod (62) is slidably disposed within the inner control cylinder (61), and its proximal end is connected to the control head (3) to drive the control head (3) to move; A first cavity (601) and a second cavity (602) are formed between the control cylinder body (1) and the control inner cylinder (61). A second partition ring (614) is provided on the outer side wall of the control inner cylinder (61). The first cavity (601) is located at the far end of the second partition ring (614), and the second cavity (602) is located at the near end of the second partition ring (614). The cross-section of the first cavity (601) is larger than the cross-section of the second cavity (602). A third cavity (603) and a fourth cavity (604) are formed between the control cylinder (61) and the piston rod (62). A sixth partition ring (622) is provided on the outer wall of the control cylinder (61). The third cavity (603) is located at the far end of the sixth partition ring (622) and at the near end of the sixth partition ring (622). The cross-section of the fourth cavity (604) is larger than that of the third cavity (603). The first cavity (601) and the third cavity (603) are connected to the first air inlet (12). The second cavity (602) and the fourth cavity (604) are connected to the second air inlet (13).

4. The nail-removing device according to claim 3, characterized in that: The control cylinder body (1) is provided with a proximity switch (7) at its far end. The space where the proximity switch (7) is located is connected to the internal space of the control cylinder (61). The piston rod (62) is provided with a feedback element (8) at its far end. When the piston rod (62) moves to the point where the gripper assembly (2) closes, the feedback element (8) triggers the proximity switch (7).

5. A nail-removing device according to claim 4, characterized in that: The feedback element (8) includes a feedback rod (81) and a feedback spring (82). The piston rod (62) is provided with an anti-detachment element (811) at its distal end. A fifth partition ring (621) is coaxially provided on the outer side wall of the piston rod (62). The feedback rod (81) is provided with a clearance groove at its proximal end for the anti-detachment element (811) to slide. The distal end of the piston rod (62) passes through the feedback rod (81) and is connected to the anti-detachment element (811). The feedback spring (82) is coaxially sleeved on the piston rod (62), and one end of the feedback spring (82) abuts against the end face of the feedback rod (81), and the other end abuts against the end face of the fifth partition ring (621).

6. A staple removal device according to any one of claims 1-5, characterized in that: The clamping section (213) of the gripper (21) has a slot (214) on the side facing the control groove (22), and the end of the chemically formed nail has a protrusion. The slot (214) matches the shape of the protrusion of the chemically formed nail.

7. A nail-removing device according to claim 6, characterized in that: The control head (3) has an ejector part (31) at one end facing the feed hole (51). When the side wall of the control head (3) abuts against the clamping section (213) of the gripper (21), the ejector part (31) abuts against the end face of the forming nail.

8. A staple removal device according to any one of claims 1-5, characterized in that: The gripper (21) is made of a material resistant to electrolyte corrosion.

9. A staple removal device according to any one of claims 1-5, characterized in that: The isolation cover (5) is detachably equipped with a protective cover (9) at the end away from the control cylinder body (1).

10. A nail-removing device according to claim 9, characterized in that: The protective cover (9) is made of elastic material.

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