Nut implantation device

Abstract

The application discloses a nut implanting device in the technical field of injection molding auxiliary equipment, which comprises a jig base frame and an implanting device. The upper end of the jig base frame is provided with a positioning plate, and the positioning plate is provided with a plurality of positioning sleeves with positioning portions and is used for supporting and positioning a plurality of nuts at the same time. The implanting device comprises an implanting jacking component, a plurality of jacking rods, a rotary driving component and a lifting driving component. The implanting jacking component is slidably connected to the jig base frame and located on the lower side of the positioning plate. The plurality of jacking rods are rotatably installed on the implanting jacking component, are one-to-one correspondingly arranged in the positioning sleeves and are provided with threaded screwing portions matched with the nuts on the upper ends. The rotary driving component is used for driving the jacking rods to rotate, and the lifting driving component is used for driving the implanting jacking component to move up and down, so that the nuts are automatically screwed and ejected into the mold cavity. The application can realize the synchronous and automatic implanting of a plurality of nuts, effectively avoid the problems of missing, misplacing and bruising and significantly improve the production efficiency and the yield of the thread connection strength.

Description

Technical Field

[0001] This invention relates to the field of injection molding equipment for automotive parts, and in particular to a nut insertion device. Background Technology

[0002] In the design of plastic structural components for automotive parts, to meet the requirements of threaded connections between components, nuts are typically pre-inserted into the mold cavity during injection molding. This results in the metal nut being embedded in the molded plastic part, enabling reliable installation and connection with other components via threaded connections. During the production of plastic components, the nut needs to be pre-placed in the mold before injection molding. Then, injection molding allows molten plastic to encapsulate and solidify around the nut, achieving better connection strength and resulting in higher yield rates for pull-out force and torque of the molded product.

[0003] Traditional methods of manually inserting nuts one by one into predetermined positions in a mold are cumbersome, especially when multiple nuts need to be inserted into a single product, resulting in long processing times and low production efficiency. Current technology uses clamping or supporting methods to fix nuts onto specific fixtures, and then an automated device moves the fixture to insert nuts into the mold in batches, significantly improving production efficiency. However, in existing fixtures, the method of supporting or clamping nuts into the mold fails to prevent molten plastic from entering the screw holes. Furthermore, it requires space around the nut's edge, preventing the molten plastic from completely enveloping and solidifying around the nut during molding. Summary of the Invention

[0004] The purpose of this invention is to provide a nut insertion device to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0005] The technical solution adopted to solve the above-mentioned technical problems is as follows: A nut implantation device includes: a positioning mechanism and an implantation mechanism; The positioning mechanism includes a fixture base frame and a positioning sleeve. The fixture base frame is provided with a positioning plate, and a plurality of positioning sleeves are installed on the positioning plate. One end of the positioning sleeve is provided with a positioning part, which is used to pre-tighten and position the nut to be implanted. The implantation mechanism includes: an implantation lifting component, a rotation drive component, and a lifting drive component; The implanted lifting component includes multiple lifting rods, each of which is coaxially inserted into the positioning sleeve. One end of each lifting rod is provided with a threaded connection corresponding to the nut. The rotary drive component is used to drive the lifting rod to rotate; The lifting drive component is used to drive the lifting rod to reciprocate along the axial direction of the positioning sleeve, so as to control the threaded joint to enter and exit the positioning sleeve.

[0006] The nut insertion device provided by this invention has at least the following beneficial effects: Multiple positioning sleeves on the positioning plate achieve synchronous pre-positioning of multiple nuts; the combined rotation and lifting motion of the lifting rod automatically screws the threaded joint into the nut; and the insertion lifting component further lifts the nut, accurately ejecting it from the positioning part and sending it into the predetermined insert position in the mold cavity. This structure achieves simultaneous, mechanized insertion of multiple nuts, replacing the tedious manual placement, fundamentally avoiding the problems of missed or incorrect placement, and significantly improving production efficiency. Simultaneously, because the nuts are effectively constrained by the threaded joint during insertion, damage or misalignment caused by manual placement is avoided, ensuring a high yield of pull-out force and torque after molding.

[0007] As a further improvement to the above technical solution, the nut has a threaded hole that runs through the top and bottom, the lower end of the threaded hole is chamfered, the threaded joint is cylindrical, and the lower side of the threaded joint is provided with a beveled boss corresponding to the chamfer.

[0008] As a further improvement to the above technical solution, the rotary drive component includes a rotary drive motor and multiple transmission gears. The multiple transmission gears are rotatably mounted on the implanted lifting component, and the output shaft of the rotary drive motor and the multiple lifting rods are synchronously connected through the multiple transmission gears.

[0009] As a further improvement to the above technical solution, the lifting rod includes a rod body and a connector, the threaded connection is provided at one end of the connector, the other end of the connector is detachably connected to the rod body, and the hardness of the connector is lower than that of the nut.

[0010] As a further improvement to the above technical solution, the rod body includes an upper rod, a middle rod, and a lower rod arranged coaxially in sequence. The upper rod and the lower rod are elastically connected to the middle rod along the axial direction of the rod body, and the elastic connection directions of the upper rod and the lower rod are opposite.

[0011] As a further improvement to the above technical solution, the rod body includes a main rod and a secondary rod, which are coaxially arranged. The secondary rod is located at one end of the main rod, and the connector is located at the other end of the main rod. The connector and the secondary rod are elastically connected to the main rod along the axial direction of the rod body, and the elastic connection directions of the connector and the secondary rod are opposite.

[0012] As a further improvement to the above technical solution, a torque limiter is provided between the connector and the rod, or between the rod and the rotary drive component, so that the rotational torque of the connector does not exceed a preset limit value.

[0013] As a further improvement to the above technical solution, the positioning sleeve is provided with a clamping member, which includes a clamping element and a clamping drive member. The clamping element has a clamping portion provided on the groove wall of the positioning part, and the clamping drive member is used to drive the clamping element to move, thereby clamping or loosening the nut in the positioning part through the clamping portion.

[0014] As a further improvement to the above technical solution, a plurality of clamping members are evenly distributed around the circumference of the positioning part, and the clamping driving component synchronously drives the plurality of clamping members to move radially along the positioning part. The clamping driving component includes a driving airbag and a valve control element. The driving airbag is connected to a high-pressure air source or a negative pressure generating element through the valve control element. The positioning sleeve is provided with a driving cavity, and the driving airbag is disposed in the driving cavity. The clamping members are connected to the driving airbag.

[0015] As a further improvement to the above technical solution, the fixture base frame also includes a base plate, the positioning plate and the base plate are spaced apart, at least a portion of the implantation lifting member and the rotation drive member are disposed between the positioning plate and the base plate, a plurality of vertically extending lifting guide posts are fixedly disposed between the positioning plate and the base plate, the implantation lifting member is slidably connected to the lifting guide posts; the implantation lifting member is fixedly provided with a mold guide post, the mold guide post is slidably inserted through the positioning plate along the axial direction of the positioning sleeve. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a perspective view of an embodiment of the nut implantation device provided by the present invention; Figure 2 This is a front view of the nut insertion device provided by the present invention when the nut is in the positioning part in one embodiment; Figure 3 This is a front view of the nut insertion device provided by the present invention when the nut is in the ejected state in one embodiment; Figure 4 This is an exploded perspective view of an embodiment of the nut, positioning sleeve, and lifting rod provided by the present invention. Figure 5 This is a cross-sectional view of an embodiment of the rod provided by the present invention; Figure 6 This is a cross-sectional view of another embodiment of the rod provided by the present invention; Figure 7 This is a top view of an embodiment of the rotary drive component provided by the present invention; Figure 8 This is a cross-sectional view of an embodiment of the positioning sleeve and clamping member provided by the present invention.

[0017] In the diagram: 100-Jig base frame, 110-Positioning plate, 120-Positioning sleeve, 130-Base plate, 131-Allowing hole, 140-Lifting guide post, 150-Clamping component, 151-Clamping piece, 152-Driving airbag, 200-Implantation lifting component, 210-Mold guide post, 300-Lifting rod, 310-Rod body, 311-Upper rod, 3111-Connecting hole, 3112-Allowing groove, 3113-Limiting slot, 3114-Limiting part, 31 2-Center rod, 3121-Center shaft, 3122-Connecting shaft, 3123-Limiting block, 3124-Limiting groove, 313-Lower rod, 314-Connecting groove, 315-Compression spring, 316-Floating spring, 320-Connecting head, 321-Threaded joint, 322-Beveled boss, 323-Pyramid, 400-Rotary drive component, 410-Drive gear, 420-Transmission gear, 430-Rotary drive motor, 500-Lifting drive component. Detailed Implementation

[0018] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0020] In the description of this invention, if there are words such as "several", they mean one or more, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.

[0021] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 6 The nut insertion device of the present invention is provided in the following embodiments: A nut implantation device includes: a jig base 100 and an implantation mechanism.

[0023] like Figures 1 to 3 As shown, the upper end of the fixture base frame 100 is provided with a positioning plate 110, the positioning plate 110 has a plurality of positioning sleeves 120, the upper end of the positioning sleeves 120 is provided with a positioning part, the positioning part is used to provide support and positioning for the nut to be implanted.

[0024] The implantation mechanism includes: an implantation lifting component 200, multiple lifting rods 300, a rotary drive component 400, and a lifting drive component 500. The implantation lifting component 200 is slidably connected to the fixture base frame 100. The number of lifting rods 300 is the same as the number of positioning sleeves 120, and multiple lifting rods 300 are rotatably mounted on the implantation lifting component 200. The number of lifting rods 300 is the same as the number of positioning sleeves 120, and their positions correspond one-to-one. Each lifting rod 300 is coaxially inserted into the corresponding positioning sleeve 120. The upper end of the lifting rod 300 is provided with a threaded connection 321 that matches the internal thread of the nut. The rotary drive component 400 is used to output rotational torque to drive all lifting rods 300 to rotate synchronously or asynchronously, and the lifting drive component 500 is used to drive the implantation lifting component 200 to reciprocate in the vertical direction.

[0025] In practical use, multiple positioning sleeves 120 on the positioning plate 110 are used to simultaneously pre-position multiple nuts. The combined rotation and lifting motion of the lifting rod 300 causes the threaded connection 321 to automatically screw into the nut. Then, the implanted lifting component 200 continues to lift, accurately ejecting the nut from the positioning part and placing it into the predetermined insert position in the mold cavity. This device achieves simultaneous, mechanized implantation of multiple nuts, replacing the tedious manual placement, fundamentally avoiding missed or incorrect placement, and significantly improving production efficiency. Simultaneously, because the nuts are effectively constrained by the threaded connection 321 during implantation, it prevents molten plastic from entering the screw hole during molding, avoiding any impact on the screw hole during product molding, or damage or misalignment caused by manual placement, ensuring a high yield rate of pull-out force and torque after molding.

[0026] In some embodiments, to facilitate moving the nut implantation device of this application embodiment to the corresponding position below the molding die, the nut implantation device can be slidably set up by a linear slide rail, and cooperate with linear drive components such as cylinders, electric push rods, hydraulic push rods or lead screw nut drive assemblies to form a transfer drive structure, or a multi-axis robot can be used for transfer, so that the nut implantation device can move relative to the molding die.

[0027] In this embodiment, four mold guide posts 210 are provided on the upper side of the implantation lifting member 200, and the four mold guide posts 210 are evenly distributed. The lower end of the mold guide post 210 is fixedly connected to the implantation lifting member 200, and the mold guide post 210 slides through the positioning plate 110 in the vertical direction. During the implantation process, the mold guide post 210 slides into the forming mold to ensure the relative positional accuracy between the implantation mechanism and the forming mold.

[0028] In this embodiment, the jig base frame 100 further includes a base plate 130, which is disposed below the positioning plate 110. The implantation lifting member 200 is disposed between the positioning plate 110 and the base plate 130. Four vertically extending lifting guide posts 140 are fixedly disposed between the positioning plate 110 and the base plate 130, and the four lifting guide posts 140 are evenly distributed. The lifting guide posts 140 pass through the implantation lifting member 200, and the implantation lifting member 200 is slidably connected to the lifting guide posts 140 through a structure such as a linear bearing or a bushing.

[0029] In this embodiment, there are two lifting drive components 500, which are arranged at a left-right interval. The two lifting drive components 500 synchronously drive the implantation lifting component 200 to move up and down relative to the substrate 130. To facilitate control of lifting speed and accuracy, the lifting drive component 500 adopts an electric push rod, which is installed upward on the substrate 130. Its cylinder is located on the lower side of the substrate 130, and its push rod passes through the substrate 130 and is connected to the implantation lifting component 200 for transmission.

[0030] The nut used for implantation is cylindrical in shape, with a central axis extending vertically and a threaded hole running vertically through it.

[0031] In this embodiment, the lower end of the screw hole is chamfered, and the lower side of the threaded connection 321 is provided with a beveled boss 322 corresponding to the chamfer. The taper of the beveled boss 322 is adapted to the chamfer angle. After the lifting rod 300 is screwed into the nut, the beveled boss 322 can abut against the chamfer at the lower end of the screw hole, preventing molten plastic from forming at the chamfer position and affecting the subsequent use of the screw hole.

[0032] The rotary drive component 400 includes a rotary drive motor 430 and a plurality of transmission gears 420. The plurality of transmission gears 420 are rotatably mounted on the implanted lifting component 200. The output shaft of the rotary drive motor 430 and the plurality of lifting rods 300 are synchronously connected through the plurality of transmission gears 420.

[0033] The implanted lifting member 200 has a gearbox located on the lower side of the positioning plate 110. Multiple transmission gears 420 are rotatably mounted in the gearbox and are connected to the output shaft of the rotary drive motor 430. The lower ends of multiple lifting rods 300 extend into the gearbox and are coaxially mounted with drive gears 410.

[0034] As attached Figure 7 As shown, each lifting rod 300 is coaxially equipped with a drive gear 410, and each drive gear 410 meshes with a transmission gear 420. Several gears can be used between the two transmission gears 420 depending on the spacing, so that each drive gear 410 is connected to the output shaft of the rotary drive motor 430; alternatively, the two transmission gears 420 can be synchronously connected using belt drive, chain drive, or other methods. It is worth noting that each drive gear 410 rotates in the same direction to achieve synchronous, unidirectional rotation of multiple lifting rods 300.

[0035] The gear transmission system enables the synchronous rotation of multiple lifting rods 300. It has a compact structure, high transmission efficiency, and can ensure that the rotation angle and speed of all lifting rods 300 are completely consistent, so that multiple lifting rods 300 can be screwed into the corresponding nuts at the same time.

[0036] To facilitate control of rotation speed and accuracy, the rotary drive motor 430 in this embodiment is a servo motor. In other embodiments, the rotary drive motor 430 may be a stepper motor or a pneumatic motor, or other rotary drive components. The rotary drive motor 430 is located on the lower middle part of the implanted lifting member 200, allowing it to maintain a small distance from each lifting rod 300, thus avoiding long-distance power transmission. The substrate 130 is provided with clearance holes 131 corresponding to the rotary drive motor 430 to prevent interference or expansion between the rotary drive motor 430 and the substrate 130 during the vertical movement of the implanted lifting member 200.

[0037] The rotary drive component 400 in this embodiment adopts a gear transmission structure, which has advantages such as long service life, stable operation, high reliability, and large power transmission, making it very suitable for drive transmission applications with multiple drive rods. Furthermore, multiple transmission gears 420 can be arranged on the same plane to achieve synchronous transmission, avoiding excessive circumferential size of the implanted lifting component 200. In other embodiments, the rotary drive component 400 can also employ other transmission methods such as belt drive, chain drive, or worm gear drive.

[0038] The lifting rod 300 includes a rod body 310 and a connector 320. A threaded connection 321 is located at the upper end of the connector 320, and the lower end of the connector 320 is detachably connected to the rod body 310. The nut is typically made of hardened steel or stainless steel. The connector 320 is made of a material with a lower hardness than the nut, such as brass, aluminum, nylon, polyoxymethylene resin, or polyetheretherketone.

[0039] The connector 320 is detachable for easy replacement, allowing for the selection of a connector 320 to match the threaded hole specifications of the nut. Furthermore, during repeated engagement and disengagement of the lifting rod 300 and the nut, wear primarily occurs on the low-cost and easily replaceable connector 320, while the nut's threaded structure is effectively protected. When the threaded engagement portion 321 of the connector 320 wears or is damaged, only the connector 320 needs to be replaced, eliminating the need to replace the entire lifting rod 300. This significantly reduces fixture maintenance costs and downtime.

[0040] In this embodiment, the upper end of the rod 310 has an upward-opening connecting groove 314, the cross-section of which is square. The lower end of the connector 320 is provided with a corresponding prism 323. The connecting groove 314 is locked to the prism 323 by radially arranged screws. In actual use, the prism 323 of the connector 320 is inserted into the connecting groove 314 to achieve synchronous rotational connection with the rod 310, and then radially tightened by screws on the groove wall of the connecting groove 314 to achieve axial relative fixation between the connector 320 and the rod 310.

[0041] It is worth noting that, to avoid collision or interference with the implantation channels on the mold, the maximum diameter of both the connector 320 and the rod 310 should be smaller than the outer diameter of the corresponding nut. The connecting groove 314 and the connector 320 are tightened and fixed by a nut screw, or a countersunk head is provided on the groove wall of the connecting groove 314, and the prism 323 is locked by a through screw, or the prism 323 is provided with a screw hole, and the connection is locked by a screw thread that passes radially through the connecting groove 314.

[0042] During the process of screwing the threaded connection 321 into the nut's threaded hole, while the rotary drive component 400 drives each lifting rod 300 to rotate, the lifting drive component 500 needs to simultaneously drive the implanted lifting component 200 to move upward, so that each lifting rod 300 can match the threaded feed process according to its rotation speed. Similarly, after the product is formed, the rotary drive component 400 drives each lifting rod 300 to rotate in the opposite direction to unscrew the threaded connection 321 from the threaded hole, while the lifting drive component 500 needs to drive the implanted lifting component 200 to move downward.

[0043] Because a large number of nuts are implanted simultaneously, the placement of each nut varies considerably. Furthermore, due to transmission backlash or accumulated mechanical errors, the rotation and lifting movements of the lifting rod 300 at different positions will exhibit slight differences. These differences can sometimes result in a nut being implanted too high or too low, or placing excessive stress on the threaded threaded portion 321 during its insertion into the threaded hole, or causing damage to the relative connection and fixing structure between the nut and the molded product due to excessive force during the unscrewing of the threaded portion 321, thus producing defective products.

[0044] In this embodiment, to address the issue of varying rotational movements among the lifting rods 300, each lifting rod 300 is equipped with a torque limiter. This torque limiter is located between the connector 320 and the rod body 310, or between the rod body 310 and the rotation drive component 400. When the engagement resistance between the nut and the threaded connection 321 exceeds a preset limit value, the torque limiter slips or disengages, thereby interrupting torque transmission.

[0045] To facilitate the disassembly and replacement of the connector 320, a torque limiter is disposed between the rod 310 and the rotary drive component 400 in this embodiment. The rotary drive component 400 drives the lifting rod 300 to rotate via gear transmission. A drive gear 410 is coaxially disposed at the lower end of the rod 310, and the torque limiter is disposed between the rod 310 and the gear. The torque limiter is disposed at the lower end of the rod 310, which can prevent the torque limiter from obstructing the vertical movement of the lifting rod 300 by interfering with the positioning sleeve 120 on the positioning plate 110.

[0046] In this structure, the connector 320 no longer bears excessive rotational torque, thus effectively preventing the internal threads of the nut from being twisted or stripped, or the threaded joint 321 of the lifting rod 300 from being excessively worn or even broken. Even if the rotational actions of each lifting rod 300 are different, each threaded joint 321 can still be fully screwed into the corresponding threaded hole.

[0047] To address the errors in the lifting and lowering process and axial position of each lifting rod 300, the lifting rod 300 adopts an elastic telescopic structure.

[0048] In some embodiments, the rod body 310 includes a main rod and a secondary rod, which are coaxially arranged. The secondary rod is located at the lower end of the main rod. The connector 320 and the secondary rod are elastically connected to the upper and lower ends of the main rod in the vertical direction, respectively. The elastic connection directions of the connector 320 and the secondary rod are opposite.

[0049] The elastic floating mechanism between connector 320 and the main rod, as well as between the main rod and the auxiliary rod, can absorb the overload force caused by inconsistent axial position of the nut during the screwing-in or screwing-out phases. It can also absorb the impact force when the lifting rod 300 presses the nut into the mold cavity at the end of its stroke. The two elastic directions are independent and opposite, protecting the threads from excessive compression or tension.

[0050] In some other embodiments, to avoid affecting the detachable connection structure between the connector 320 and the rod 310, an elastic telescopic structure is provided on the rod 310. Specifically, the rod 310 includes an upper rod 311, a middle rod 312, and a lower rod 313 arranged coaxially. The upper rod 311 and the lower rod 313 are elastically connected to the upper and lower ends of the middle rod 312 in the vertical direction, respectively, and the elastic connection directions of the upper rod 311 and the lower rod 313 are opposite.

[0051] The segmented elastic connection structure of the aforementioned rod 310 enables the lifting rod 300 to have floating compensation capabilities in two opposite directions along the axial direction. During the process of the lifting rod 300 descending and screwing into the nut, if there is a deviation in the nut's positioning height, the upper rod 311 can elastically retract upwards; when the lifting rod 300 pushes the nut into the mold cavity, if there is a height tolerance between the bottom surface of the mold cavity and the positioning plate 110, the lower rod 313 can elastically retract downwards. This bidirectional floating design effectively avoids damage to the nut or mold cavity caused by rigid lifting, while ensuring the adaptability of the nut insertion depth and improving the yield rate.

[0052] In some embodiments, refer to the appendix Figure 5 The middle rod 312 includes a central shaft body 3121 and connecting shafts 3122. Two connecting shafts 3122 are respectively located at the upper and lower ends of the central shaft body 3121. The lower end of the upper rod 311 and the upper end of the lower rod 313 are each provided with vertically extending connecting holes 3111. The two connecting shafts 3122 are coaxially and slidably inserted through the two connecting holes 3111, so that both the upper rod 311 and the lower rod 313 are slidably connected to the middle rod 312 in the vertical direction.

[0053] Each of the two connecting holes 3111 has a clearance groove 3112 at one end facing the central shaft 3121. A compression spring 315 is installed in the clearance groove 3112, and the compression spring 315 is coaxially sleeved on the connecting shaft 3122. The two ends of the compression spring 315 elastically abut against the bottom of the clearance groove 3112 and the axial end face of the central shaft 3121, respectively, so that the upper rod 311 and the lower rod 313 tend to move away from the central shaft 3121 axially under the action of elastic force.

[0054] Each of the two connecting holes 3111 has a limiting groove 3113 at the end opposite to the central shaft 3121, and a limiting block 3123 is provided at the end of the connecting shaft 3122 away from the central shaft 3121. The limiting blocks 3123 are arranged in pairs radially, or multiple limiting blocks 3123 are evenly distributed around the circumference of the connecting shaft 3122. There is a clearance between each limiting block 3123, and the limiting blocks 3123 move closer to each other through elastic deformation.

[0055] During the assembly of rod 310, compression spring 315 is first fitted into connecting shaft 3122 or placed in clearance groove 3112. Connecting shaft 3122 is inserted into connecting hole 3111. Limiting blocks 3123 are squeezed by the inner wall of connecting hole 3111 and elastically deform to move closer to each other until limiting blocks 3123 are inserted into limiting slot 3113 and elastically reset to achieve snap-fit ​​connection, thus completing the assembly of the elastic floating structure between upper rod 311, middle rod 312 and lower rod 313.

[0056] In other embodiments, refer to the appendix. Figure 6 The middle rod 312 includes a central shaft body 3121 and connecting shafts 3122. Two connecting shafts 3122 are respectively located at the upper and lower ends of the central shaft body 3121. The lower end of the upper rod 311 and the upper end of the lower rod 313 are each provided with vertically extending connecting holes 3111. The two connecting shafts 3122 are coaxially and slidably inserted through the two connecting holes 3111, so that both the upper rod 311 and the lower rod 313 are slidably connected to the middle rod 312 in the vertical direction.

[0057] The difference is that the depth of the connecting hole 3111 is greater than the length of the connecting shaft 3122, and a floating spring 316 is provided between the connecting shaft 3122 and the connecting hole 3111. The two ends of the floating spring 316 elastically abut against the ends of the connecting hole 3111 and the connecting shaft 3122, respectively, so that the ends of the connecting shaft 3122 tend to move away from the bottom of the connecting hole 3111.

[0058] Furthermore, a limiting groove 3124 is provided on the outer side of the connecting shaft 3122, and a limiting part 3114 is provided on the inner wall of the connecting hole 3111, which is radially aligned and extends into the limiting groove 3124. In this embodiment, the limiting part 3114 is the end of a screw that is radially threaded into the upper rod 311 or the lower rod 313.

[0059] During the assembly of rod 310, the floating spring 316 is first placed into the connecting hole 3111, and then the connecting shaft 3122 is inserted into the connecting hole 3111 to press the floating spring 316. The limiting part 3114 is adjusted so that it extends into the limiting groove 3124, thereby limiting the axial relative position of the connecting shaft 3122 and the connecting hole 3111, as well as the relative rotation of the connecting shaft 3122 and the connecting hole 3111. This structure is simpler to assemble and facilitates disassembly and replacement of parts. Furthermore, when there is no axial floating, the ends of the upper rod 311 and the lower rod 313 can be pressed against the upper and lower end faces of the central shaft 3121 under the action of elastic force, avoiding gaps and reducing the possibility of foreign objects entering and causing floating failure.

[0060] The nut for implantation is cylindrical in shape, with a vertically extending central axis and a through-hole coaxially arranged. The outer side of the nut has an anti-slip textured structure to increase its resistance to rotation after molding. In some embodiments, the inner side of the positioning part has an anti-slip texture that matches the outer circumference of the nut, increasing the friction between the nut and the positioning part, preventing the nut from rotating relative to the positioning part, and ensuring that the threaded engagement part 321 can be screwed into the threaded hole.

[0061] In other embodiments, the outer circumferential surface of the nut may also be hexagonal, knurled, or have a grooved structure. The positioning part is designed to mimic its shape, thereby providing circumferential limitation and axial support for the nut to be implanted while improving its anti-rotation ability within the positioning part.

[0062] This design, which uses the shape and structure of the positioning part to achieve the anti-rotation function of the nut, has high requirements for the placement of the nut. In this embodiment, the positioning sleeve 120 is provided with a clamping member 150 for clamping the nut. The clamping member 150 includes a clamping element 151 and a clamping drive member. The clamping element 151 has a clamping portion provided in the groove wall of the positioning part, and the clamping drive member is used to drive the clamping element 151 to move, thereby applying a radial clamping force to the nut in the positioning part or releasing the clamp. The shape of the clamping portion is adapted to the knurling of the outer peripheral surface of the nut to achieve surface contact or line contact clamping.

[0063] During the process of the lifting rod 300 rotating to screw into the nut, the clamping member 150 can temporarily clamp the nut to prevent the nut from rotating with the lifting rod 300 and thus failing to achieve relative screwing. When the lifting rod 300 needs to push the nut out of the positioning part, the clamping member 150 releases, allowing the nut to move upward. This structure ensures a reliable engagement process where "the lifting rod 300 rotates but the nut does not," avoiding situations where the threads cannot properly mesh due to the nut rotating with it.

[0064] To ensure the positioning accuracy of the nut, this embodiment uses multiple clamping members 151, which are evenly distributed around the circumference of the positioning part. The clamping drive component synchronously drives the multiple clamping members to move radially towards the center or outward from the positioning part. Figure 8 As shown, the clamping drive component in this embodiment includes a drive airbag 152, which is connected to a high-pressure air source or a negative pressure generating element via a valve control element. The positioning sleeve 120 has a drive cavity, and the drive airbag 152 is disposed within the drive cavity. The clamping member 151 is connected to the drive airbag 152. When the drive airbag 152 is inflated, its expansion pushes the clamping member 151 towards the center, clamping the nut; when the drive airbag 152 is connected to negative pressure, its contraction causes the clamping member 151 to move away from the center, thereby loosening the nut.

[0065] The positioning sleeve 120 is provided with a radially extending groove structure. The clamping member 151 is slidably installed on the positioning sleeve 120 through the groove structure, and the stroke of the clamping member 151 is limited by the two ends of the groove. When the driving airbag 152 contracts and drives the clamping member 151 to press outward, the clamping part can be flush with the positioning part; when the driving airbag 152 inflates, it can drive the clamping member to press inward.

[0066] Using an airbag as the clamping power source provides a more flexible clamping force compared to traditional springs or cylinders, while avoiding damage to the nut surface caused by rigid clamping, especially for plated or soft nuts. The airbag drive also allows multiple clamping elements 151 to be subjected to uniform and synchronous force, ensuring the nut's alignment within the positioning section. High-speed switching between clamping and releasing can be achieved by controlling the inflation and deflation or negative pressure of the airbag through a valve-controlled element. This results in fast response, a compact structure, and avoids electromagnetic interference or installation space issues associated with motors or cylinders.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0068] Although embodiments of the present invention have been shown and described, those skilled in the art can make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the invention. All such changes, modifications, equivalent alterations or substitutions are included within the scope defined by the claims of this application, and the scope of the invention is defined by the claims and their equivalents.

Claims

1. A nut insertion device, characterized in that: include: Positioning and implantation devices; The positioning mechanism includes: A fixture base frame, wherein the fixture base frame is provided with a positioning plate; Positioning sleeves, multiple positioning sleeves are installed on the positioning plate, and one end of each positioning sleeve is provided with a positioning part, which is used to pre-tighten and position the nut to be implanted. The implantation device includes: An implantable lifting component is provided, which includes multiple lifting rods. Each lifting rod is coaxially inserted into the positioning sleeve, and one end of each lifting rod is provided with a threaded connection corresponding to the nut. A rotary drive component, which is used to drive the lifting rod to rotate; A lifting drive component is provided to drive the lifting rod to reciprocate along the axial direction of the positioning sleeve, so as to control the threaded joint to enter and exit the positioning sleeve.

2. The nut insertion device according to claim 1, characterized in that: The threaded connection part is cylindrical in shape, and the outer wall of the threaded connection part is provided with a beveled boss, which matches and corresponds to the chamfer of the screw hole port of the nut.

3. The nut insertion device according to claim 1, characterized in that: The rotary drive component includes a rotary drive motor and multiple transmission gears. The multiple transmission gears are rotatably mounted on the implanted lifting component. The output shaft of the rotary drive motor and the multiple lifting rods are synchronously connected through the multiple transmission gears.

4. The nut insertion device according to claim 1, characterized in that: The lifting rod includes a rod body and a connector. The threaded connection is located at one end of the connector, and the other end of the connector is detachably connected to the rod body. The hardness of the connector is lower than that of the nut.

5. The nut insertion device according to claim 4, characterized in that: The rod body includes an upper rod, a middle rod, and a lower rod arranged coaxially in sequence. The upper rod and the lower rod are elastically connected to the middle rod along the axial direction of the rod body, and the elastic connection directions of the upper rod and the lower rod are opposite.

6. The nut insertion device according to claim 4, characterized in that: The rod body includes a main rod and a secondary rod, which are coaxially arranged. The secondary rod is located at one end of the main rod, and the connector is located at the other end of the main rod. The connector and the secondary rod are elastically connected to the main rod along the axial direction of the rod body, and the elastic connection directions of the connector and the secondary rod are opposite.

7. The nut insertion device according to claim 4, characterized in that: A torque limiter is provided between the connector and the rod, or between the rod and the rotary drive component, so that the rotational torque of the connector does not exceed a preset limit value.

8. The nut insertion device according to claim 1, characterized in that: The positioning part has a groove-shaped structure, and the positioning sleeve is provided with a clamping member. The clamping member includes a clamping element and a clamping drive member. The clamping element has a clamping part provided on the groove wall of the positioning part. The clamping drive member is used to drive the clamping element to move, thereby clamping or loosening the nut in the positioning part through the clamping part.

9. The nut insertion device according to claim 8, characterized in that: Multiple clamping members are evenly distributed around the circumference of the positioning part. The clamping drive component synchronously drives the multiple clamping members to move radially along the positioning part. The clamping drive component includes a drive airbag and a valve control element. The drive airbag is connected to a high-pressure air source or a negative pressure generating element through the valve control element. The positioning sleeve is provided with a drive cavity. The drive airbag is disposed in the drive cavity. The clamping members are connected to the drive airbag.

10. The nut insertion device according to claim 1, characterized in that: The fixture base frame also includes a base plate, the positioning plate and the base plate are spaced apart, at least a portion of the implantation lifting member and the rotation drive member are disposed between the positioning plate and the base plate, and a plurality of vertically extending lifting guide columns are fixedly disposed between the positioning plate and the base plate, and the implantation lifting member is slidably connected to the lifting guide columns. The implantation lifting component is fixedly provided with a mold guide post, which slides along the axial direction of the positioning sleeve through the positioning plate.

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