A floating self-aligning crimping fixture for electronic connector pin headers and terminals

Abstract

This invention relates to the field of electronic component assembly, specifically a floating self-aligning pressing fixture for electronic connector pin sockets and terminals. It includes an upper mold assembly and a lower mold assembly with alignment and fit. The upper mold assembly includes a fixed frame, a sliding frame, a pressing drive component, and a floating correction frame. The sliding frame is embedded in one side of the fixed frame, and a sliding plate is slidably installed at the center of the sliding frame. A first cylinder is installed between the rear end of the sliding plate and the inner wall of the sliding frame. This invention utilizes the coordinated operation of the floating correction structure of the upper mold assembly, the flexible clamping and fine-tuning structure of the terminals, and the bidirectional floating pressing head mechanism of the lower mold assembly to construct a bidirectional dynamic self-aligning compensation mode. This addresses industry pain points such as large alignment deviations, easy damage to terminals, poor assembly stability, low fault tolerance, and insufficient yield in traditional connector terminal and pin socket pressing fixtures, achieving bidirectional floating self-aligning functionality and completing precision pressing operations.

Description

Technical Field

[0001] This invention relates to the field of electronic component assembly technology, specifically a floating self-aligning pressing tool for electronic connector pin headers and terminals. Background Technology

[0002] Electronic connectors are core components in consumer electronics, automotive electronics, and industrial control. They rely on the precise pressing and insertion of pins and terminals to achieve stable circuit conduction, directly determining the signal transmission quality and overall connection reliability of the equipment. As electronic devices iterate towards miniaturization, high density, and high precision, multi-hole integrated structures for connectors are becoming increasingly common, placing higher demands on the alignment accuracy of pins and terminals and the consistency of assembly.

[0003] However, the crimping operation of connector pin sockets and terminals is complex. During the assembly process, it is easily affected by factors such as material placement deviation, equipment mechanical vibration, and tooling cumulative errors. Terminals are prone to problems such as angular misalignment and uneven height, which can lead to misalignment between terminals and pin socket holes, uneven insertion depth, and assembly defects such as poor connector contact and terminal bending failure.

[0004] Currently, pressing fixtures generally adopt unidirectional rigid pressing and rigid clamping structures, lacking adaptive correction and floating compensation capabilities. The rigid contact clamping method is very easy to scratch the plating on the terminal surface, cause pin deformation due to extrusion, and damage the structural integrity of precision components. In addition, the tooling structure has a single dimension of adaptability, making it difficult to adapt to the posture adjustment and alignment operations of terminals and pin holders of different specifications, and the equipment has poor fault tolerance and versatility. To address the aforementioned technical deficiencies, and with the aim of improving the accuracy of pressing and assembly and the stability of mass production, an improved structure is proposed, employing a bidirectional floating self-aligning flexible clamping mechanism. This structure adapts to the diverse assembly force patterns of connector terminals, offsets assembly deviations and equipment vibration errors, and avoids product connection failures caused by alignment deviations and workpiece damage, thus meeting the mass production requirements of high-precision electronic connectors. Summary of the Invention

[0005] The purpose of this invention is to construct a bidirectional dynamic self-alignment compensation mode by coordinating the upper mold assembly floating correction structure, the terminal flexible clamping fine adjustment structure, and the lower mold assembly bidirectional floating pressure head mechanism. This addresses industry pain points such as large alignment deviations between connector terminals and pin seats, easy damage to terminals, poor assembly stability, low fault tolerance, and insufficient yield in traditional connector terminal and pin seat pressing tooling. The invention achieves bidirectional floating self-alignment function and completes precision pressing operations.

[0006] The objective of this invention can be achieved through the following technical solution: a floating self-aligning pressing tool for electronic connector pin headers and terminals, comprising an upper mold assembly and a lower mold assembly configured for alignment and mating; The upper mold assembly includes a fixed frame, a sliding frame, a pressing drive component, and a floating correction frame. The sliding frame is embedded in one side of the fixed frame, and a slide plate is slidably installed at the center of the sliding frame. A first cylinder is installed between the rear end of the slide plate and the inner wall of the sliding frame. The slide plate is movably connected to the pressing drive component, which is movably mounted on the lower end of the slide plate to realize automatic terminal clamping, displacement fine adjustment, and vertical pressing assembly operations. The floating correction frame is floatingly mounted on the bottom of the pressing drive component to adaptively correct the terminal offset angle and height before pressing. The lower mold assembly includes a fixed base and a bidirectional floating pressure head mechanism. A contoured cavity for placing the needle seat is provided above the fixed base. The bidirectional floating pressure head mechanism is located at the opening of the contoured cavity. It can adaptively clamp and limit the needle seat and cooperate with the upper mold assembly to achieve bidirectional floating self-alignment, offset the pressing deviation, and complete the precise pressing of the terminal and the needle seat.

[0007] Furthermore, the pressing drive includes an extension frame, and a floating cylinder is fixedly installed at the overlapping end of the extension frame and the slide plate. The floating cylinder extends to the upper end of the extension frame and is movably connected to a rotating cylinder. A miniature drive motor is provided at the bottom of the rotating drum and on the surface of the sliding plate. An inclined guide ring groove is provided on the outside of the rotating drum, and a retaining shaft is provided on the side of the floating drum corresponding to the inclined guide ring groove. The retaining shaft and the inclined guide ring groove form a sliding connection, and the rotational motion is converted into lifting motion.

[0008] Furthermore, the extension frame has a toothed roller shaft running longitudinally through the end away from the floating cylinder, and a needle-picking and clamping cylinder for picking up and holding terminals is fixedly installed at the bottom of the toothed roller shaft; The cavity inside the extension frame is fitted with a full gear, which meshes with the outer teeth of the toothed roller shaft for transmission. A second drive motor is fixedly installed on the outer wall of the extension frame. The output shaft of the second drive motor is coaxially fixed with the full gear. The second drive motor drives the full gear to rotate, which in turn rotates and lifts the toothed roller shaft, causing the needle-picking cylinder to move vertically and make fine adjustments in sync, thus completing the automated picking, posture adjustment and pre-alignment of the terminals.

[0009] Furthermore, an arc-shaped pressure frame is movably installed on the inner walls of the front, back, and sides of the syringe. A semi-cylinder is embedded in the inner side of the arc-shaped pressure frame from top to bottom. A spring coil is installed on the side of the semi-cylinder away from the opening end together with the inside of the arc-shaped pressure frame. An exposed rubber ball is rotatably connected to the opening of the semi-cylinder, and the rubber ball partially protrudes to the outside of the arc-shaped pressure frame. A movable abutment is fixedly connected to the center of the outer wall of the arc-shaped pressure frame. The movable abutment is provided with an inclined rail groove on the side away from the arc-shaped pressure frame and extends to the outside of the needle tube. By opening and closing multiple sets of arc-shaped pressure frames simultaneously, and in conjunction with the elastic rotatable rubber ball, the terminal is flexibly wrapped and clamped, avoiding the problems of terminal plating scratches and needle deformation.

[0010] Furthermore, the syringe is sleeved with a longitudinally lifting cylinder, and a positioning plate is fixedly installed on the outside of the toothed roller shaft and at the upper end of the syringe. The positioning plate and the upper end of the lifting cylinder are jointly provided with a second cylinder. Vertical slots are respectively provided on the left and right corresponding positions of the lifting cylinder wall and the movable abutment plate, and the abutment shaft fixedly installed at the center of the vertical slot is engaged in the corresponding inclined rail slot.

[0011] Furthermore, the floating correction frame is movably installed at the bottom of the extension frame, and guide rods are fixedly installed at the center of the front and rear ends of the floating correction frame, respectively. The ends of the two sets of guide rods extend to the outside of the fixed frame and are fitted with a set of return springs around the outer perimeter. Several sets of abutment grooves are installed at equal intervals on the top surface of the floating correction frame, and the inner wall of one side of the abutment groove is inclined with a guide surface. The bottom of the terminal first presses against the abutment groove to force the length of the bottom of the terminal extending outward to be the same, and then moves along the inclined surface of the abutment groove and vertically penetrates the inside of the abutment groove to move downward vertically to avoid deviation.

[0012] Furthermore, the bidirectional floating pressure head mechanism includes hinged hollow cylinders at both ends of the front and rear inner walls of the conformal cavity. One set of the hinged hollow cylinders is hinged to a guide rod with the floating correction frame. A movable shaft is installed through the interior of each set of hinged hollow cylinders. A limit strip is fixedly installed on the outer wall of the movable shaft and slides in cooperation with a limit groove provided on the inner wall of the hinged hollow cylinder. A swing frame is fixedly installed on each set of movable shafts away from the hinged hollow cylinder. The middle sections of two adjacent sets of swing frames in the same row are hinged together with a connecting rod, and the top ends of both are hinged together with a clamping plate.

[0013] Furthermore, a concave sliding frame is sleeved through the center of the bottom of the two sets of connecting rods, and a helical screw is installed through the concave sliding frame. The two helical screws adopt a reverse thread structure, and a bidirectional drive motor is installed between them to realize the floating limit of the needle seat.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention adopts a bidirectional floating alignment design of upper and lower molds, which completely breaks the limitations of traditional unidirectional pressing and no deviation compensation. The upper mold assembly is equipped with a floating correction frame, which can adaptively correct the angle offset and height error of the terminals before pressing. At the same time, it is equipped with a guide structure for the positioning groove, which can unify the exposed length of the bottom of all terminals and eliminate the insertion depth deviation caused by uneven terminals. The micro drive motor and gear meshing transmission structure can precisely adjust the vertical height and assembly angle of the terminals. The bidirectional floating pressure head mechanism of the lower mold assembly can adaptively swing to follow the offset posture of the upper terminal. Through the reverse transmission structure of the guide rod, hinged empty cylinder and spiral screw, it drives the overall angle of the pin seat to be finely adjusted, so that the pin seat socket, terminal and alignment groove always remain vertically aligned. The bidirectional dynamic compensation of the upper and lower molds can effectively offset the mechanical vibration of the equipment, the workpiece placement deviation and the cumulative assembly error, and comprehensively ensure the coaxiality of the multi-hole pressing of the terminal and the pin seat, which is compatible with the production and assembly standards of high-precision electronic connectors. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram showing the combination of the upper mold assembly and the lower mold assembly of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the combination of the sliding carrier and the pressing drive component of the present invention; Figure 4 This is a cross-sectional view of the pressing drive component of the present invention; Figure 5 This is a three-dimensional schematic diagram of the combination of the lifting tube and the syringe tube of the present invention; Figure 6 This is a half-sectional schematic diagram of the combined lifting and needle-removing tubes of the present invention. Figure 7 This is a partial structural diagram of the arc-shaped pressure frame of the present invention; Figure 8 This is a schematic diagram of the combination of the fixed base and the bidirectional floating pressure head mechanism of the present invention.

[0017] In the diagram: 1. Upper mold assembly; 2. Lower mold assembly; 3. Fixed frame; 4. Sliding frame; 5. Pressing drive component; 6. Floating correction frame; 7. Fixed base; 8. Bidirectional floating pressure head mechanism; 41. Slide plate; 42. First cylinder; 51. Extension frame; 52. Floating cylinder; 53. Rotating cylinder; 54. Micro drive motor; 55. Toothed roller shaft; 56. Needle cylinder; 57. Full gear; 58. Drive motor two; 59. Arc-shaped pressure frame; 591. Semi-cylinder; 592. Spring coil; 593. Rubber rotating ball; 510. Movable abutment; 511. Lifting cylinder; 512. Second cylinder; 61. Guide rod; 81. Hinged empty cylinder; 82. Movable shaft; 83. Swing frame; 84. Connecting rod; 85. Clamping plate; 86. Concave sliding frame; 87. Helical screw; 88. Bidirectional drive motor. Detailed Implementation

[0018] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figures 1-2 As shown, a floating self-aligning pressing tool for electronic connector pin headers and terminals includes an upper mold assembly 1 and a lower mold assembly 2 configured for alignment and mating. The upper mold assembly 1 includes a fixed frame 3, a sliding frame 4, a pressing drive 5, and a floating correction frame 6. The sliding frame 4 is embedded in one side of the fixed frame 3, and a slide plate 41 is slidably installed in the center of the sliding frame 4. A first cylinder 42 is installed between the rear end of the slide plate 41 and the inner wall of the sliding frame 4. The slide plate 41 is movably connected to the pressing drive 5. The pressing drive 5 is movably installed at the lower end of the slide plate 41 to realize automatic terminal clamping, displacement fine adjustment, and vertical pressing assembly operations. The floating correction frame 6 is floatingly installed at the bottom of the pressing drive 5 to adaptively correct the terminal offset angle and height before pressing. The lower mold assembly 2 includes a fixed base 7 and a bidirectional floating pressure head mechanism 8. The fixed base 7 is provided with a contoured cavity for placing the needle seat. The bidirectional floating pressure head mechanism 8 is located at the opening of the contoured cavity. It can adaptively clamp and limit the needle seat and cooperate with the upper mold assembly 1 to achieve bidirectional floating self-alignment, offset the pressing deviation, and complete the precise pressing of the terminal and the needle seat.

[0020] The overall operation steps of this device include: first, placing the terminal to be pressed in the designated position of the upper mold assembly 1, and using the first cylinder 42 to drive the slide plate 41 for initial positioning adjustment to ensure that the terminal is in the correct assembly posture; then, starting the pressing drive 5 to move it vertically downward along the pressing drive 5 and the terminal, while the floating correction frame 6 automatically makes fine adjustments to the angle and height according to the actual position of the terminal to eliminate any possible initial deviations; In the lower mold assembly 2, the pin seat is placed in the contour cavity and is adaptively clamped and fixed by the bidirectional floating pressure head mechanism 8 to ensure its stability during the pressing process. When the upper mold assembly 1 and the lower mold assembly 2 approach each other, the bidirectional floating pressure head mechanism 8 and the floating correction frame 6 work together to achieve bidirectional dynamic alignment compensation, thereby accurately completing the pressing operation of the terminal and the pin seat, which can significantly improve assembly accuracy and production efficiency.

[0021] Example 2: Please refer to Figure 3 - Figure 7As shown, the pressing drive component 5 includes an extension frame 51, and a floating cylinder 52 is fixedly installed at the overlapping end of the extension frame 51 and the slide plate 41. The floating cylinder 52 extends to the upper end of the extension frame 51 and is movably connected to a rotating cylinder 53. A micro drive motor 54 is provided at the bottom of the rotating cylinder 53 and on the surface of the slide plate 41. An inclined guide ring groove is provided on the outside of the rotating cylinder 53, and a retaining shaft is provided on the side of the floating cylinder 52 corresponding to the inclined guide ring groove. The retaining shaft and the inclined guide ring groove form a sliding connection, and the rotational motion is converted into lifting motion. A toothed roller shaft 55 extends longitudinally through the end of the extension frame 51 away from the floating cylinder 52, and a needle-picking and clamping terminal cylinder 56 is fixedly installed at the bottom of the toothed roller shaft 55. The internal cavity of the extension frame 51 is fitted with a full gear 57, which meshes with the outer teeth of the toothed roller shaft 55 for transmission. A second drive motor 58 is fixedly installed on the outer wall of the extension frame 51. The output shaft of the second drive motor 58 is coaxially fixed with the full gear 57. The second drive motor 58 drives the full gear 57 to rotate, which in turn drives the toothed roller shaft 55 to rotate and lift, thereby driving the needle cylinder 56 to move vertically and make fine adjustments in sync, thus completing the automated terminal picking, posture adjustment and pre-alignment. Arc-shaped pressure frames 59 are movably installed on the inner walls of the front, back, and sides of the syringe 56. A semi-cylinder 591 is embedded in the inner side of the arc-shaped pressure frame 59 from top to bottom. A spring coil 592 is installed on the side of the semi-cylinder 591 away from the opening end together with the inside of the arc-shaped pressure frame 59. An exposed rubber ball 593 is rotatably connected to the opening of the semi-cylinder 591. The rubber ball 593 protrudes partially to the outside of the arc-shaped pressure frame 59. A movable abutment 510 is fixedly connected to the center of the outer wall of the arc-shaped pressure frame 59. The movable abutment 510 is provided with a slanted rail groove on the side away from the arc-shaped pressure frame 59 and extends to the outside of the syringe 56. By opening and closing multiple sets of arc-shaped pressure frames 59 simultaneously, in conjunction with the elastic rotatable rubber ball 593, flexible wrapping and clamping of the terminal is achieved, avoiding the problems of scratching the terminal plating and deformation of the needle pins.

[0022] The syringe 56 is sleeved with a longitudinally lifting cylinder 511, and a positioning plate is fixedly installed on the outside of the toothed roller shaft 55 and located at the upper end of the syringe 56. The positioning plate and the upper end of the lifting cylinder 511 are jointly provided with a second cylinder 512. The cylinder wall of the lifting cylinder 511 and the movable abutment 510 are respectively provided with vertical slots on the left and right sides, and the abutment shaft fixedly installed at the center of the vertical slot is engaged in the corresponding inclined rail slot. It is worth noting that the floating correction frame 6 is movably installed at the bottom of the extension frame 51, and guide rods 61 are fixedly installed at the center of the front and rear ends of the floating correction frame 6. The ends of the two sets of guide rods 61 extend to the outside of the fixed frame 3 and are fitted with a set of return springs around the outer perimeter. Several sets of abutment grooves are installed at equal intervals on the top surface of the floating correction frame 6, and the inner wall of one side of the abutment groove is inclined with a guide surface. The bottom of the terminal first presses against the abutment groove to force the length of the bottom of the terminal extending outward to be the same, and then moves along the inclined surface of the abutment groove and vertically penetrates the inside of the abutment groove to move downward vertically to avoid deviation. In the specific pickup and preliminary correction stage: First, the drive motor 58 starts, driving the gear 57 to rotate. Through the meshing transmission with the toothed roller shaft 55, the needle cylinder 56 achieves vertical displacement. At the same time, the second cylinder 512 pushes the lifting cylinder 511 to move longitudinally, and the movable abutment 510 slides in the inclined rail groove, causing multiple sets of arc-shaped pressure frames 59 to open and close synchronously. The rubber rotating ball 593 adheres to the terminal surface under the elastic action of the spring coil 592, completing the flexible wrapping and clamping action to ensure that the terminal is not damaged during pickup.

[0023] Next, the micro drive motor 54 drives the rotating drum 53 to rotate, and the clamping shaft slides along the inclined guide ring groove, converting the rotational motion into lifting motion, further adjusting the height and angle of the syringe 56; the floating cylinder 52, in conjunction with the extension frame 51, ensures the stability of the syringe 56 during movement and avoids mechanical vibration causing the terminal position to shift.

[0024] Finally, when the bottom of the terminal enters the positioning groove, it first contacts and interacts with the inclined surface of the positioning groove, forcing the top of the terminal to align with the inner wall of the top of the needle tube 56, leaving no room for further upward movement. At this point, the length of the bottom of the terminal protruding outside the needle tube 56 remains uniform, preventing deviations in the length of the insertion into the needle holder groove due to inconsistent exposed lengths of the terminals during subsequent pressing. After the length is uniform, the terminal moves smoothly downward along the guide surface of the positioning groove. At this point, the oblique force forces the floating correction frame 6 to move to one side until the terminal is vertically inserted into the alignment groove, thereby correcting the vertical angle of the terminal and effectively avoiding pressing errors caused by initial posture deviations, providing a reliable guarantee for subsequent pressing operations.

[0025] Example 3: Please refer to Figure 2 and Figure 8 As shown, the bidirectional floating pressure head mechanism 8 includes hinged hollow cylinders 81 at both ends of the inner walls of the contoured cavity. One set of the hinged hollow cylinders 81 is hinged to a guide rod with the floating correction frame 6. A movable shaft 82 is installed through the interior of each set of hinged hollow cylinders 81. A limit strip is fixedly installed on the outer wall of the movable shaft 82 and slides in cooperation with the limit groove provided on the inner wall of the hinged hollow cylinder 81. A swing frame 83 is fixedly installed on each set of movable shafts 82 away from the hinged hollow cylinder 81. A connecting rod 84 is hinged together in the middle of two adjacent sets of swing frames 83 in the same row, and a clamping plate 85 is hinged together at the top of both sets. Anti-slip textures are provided on the opposing surfaces of the front and rear sets of clamping plates 85. A concave sliding frame 86 is sleeved through the center of the bottom of the front and rear sets of connecting rods 84, and a spiral screw 87 is installed through the interior of the concave sliding frame 86. The front and rear spiral screws 87 adopt a reverse thread structure, and a bidirectional drive motor 88 is provided between them to realize the floating limit of the needle seat.

[0026] During the insertion and pressing stage of the needle seat and terminal: First, the needle seat is placed in the contour cavity, and the bidirectional drive motor 88 is started to drive the spiral screw 87 to rotate. Since the spiral screw 87 adopts a reverse thread structure, the concave slide frame 86 moves horizontally under the drive of the screw, which in turn pulls the connecting rod 84 and the clamping plate 85 to move synchronously. The two sets of clamping plates 85 move closer to each other and towards the needle seat. The anti-slip texture adaptively clamps and fixes the needle seat to ensure that it maintains a stable posture during the pressing process.

[0027] When it is necessary to insert the terminal into the inner groove of the needle holder, according to the deflection position of the floating correction frame 6, the guide rod pulls one set of hinged empty cylinders 81 to swing, thereby driving the remaining hinged empty cylinders 81 and the needle holder held therein to deflect as a whole, so that the terminal insertion position, the abutment groove and the needle holder insertion hole are kept in the same vertical position, realizing the vertical alignment of the terminal and the needle holder insertion hole. At this time, the drive motor 58 is started, driving the full gear 57 to rotate, forcing the toothed roller shaft 55, the needle picking cylinder 56 and the terminal to continue to sink downward, and the terminal is inserted into the hole groove in a straight line, thus completing the docking of the needle holder and the terminal. After the first terminal is inserted, the above steps are followed and the first cylinder 42 is used to complete the terminal insertion of the multi-hole groove in sequence.

[0028] It is worth noting that the movable shaft 82 is slidably positioned within the hinged hollow cylinder 81, which prevents the continuous swinging and angle adjustment of the hinged hollow cylinder 81, movable shaft 82, and clamping plate 85 from being affected when the position of the clamping plate 85 is adjusted. Simultaneously, the cooperation of the limiting strip and the limiting groove achieves precise guidance, ensuring the stable and controllable movement trajectory of the swing frame 83. This design effectively compensates for offsets caused by assembly errors or mechanical vibrations, thereby improving alignment accuracy.

[0029] With the bidirectional floating self-alignment mechanism, the terminals and pin sockets achieve high-precision insertion and crimping. The entire process not only improves assembly efficiency but also significantly reduces quality problems caused by human or equipment factors, meeting the production requirements of precision electronic connectors.

[0030] Working principle: During operation, the terminal to be assembled is first placed in the working position of the upper mold assembly 1. The slide plate 41 is driven to slide horizontally by the first cylinder 42, which drives the pressing drive 5 and the terminal assembly at the lower end to complete the initial position calibration, eliminate the initial feeding offset, and ensure that the terminal enters the working posture.

[0031] During the operation of the pressing drive component 5, the second drive motor 58 drives the full gear 57 to rotate, which in turn drives the toothed roller shaft 55 to rotate and rise through gear meshing transmission. This drives the needle-picking cylinder 56 to move vertically, completing the automatic terminal picking and pre-alignment operation. At the same time, the second cylinder 512 outside the needle-picking cylinder 56 drives the lifting cylinder 511 to move longitudinally. Utilizing the sliding cooperation between the abutment shaft inside the vertical slot of the lifting cylinder 511 and the inclined rail groove of the movable abutment piece 510, multiple sets of arc-shaped pressing frames 59 are driven to open and close synchronously. The arc-shaped pressing frame 59 is equipped with a spring coil 592, a semi-cylinder 591, and an exposed rubber rotating ball 593, which can form an elastic wrapping flexible clamp for the terminal. Relying on the rotatable characteristics of the rubber rotating ball 593 and the buffering performance of the spring, the terminal plating is scratched and the needle pins are squeezed and deformed due to rigid clamping.

[0032] During the terminal posture fine-tuning stage, the micro drive motor 54 drives the rotating drum 53 to rotate. Relying on the sliding cooperation between the external inclined guide ring groove of the rotating drum 53 and the side wall retaining shaft of the floating drum 52, the rotational motion is converted into precise lifting motion, which drives the extension frame 51 and the needle tube 56 to make small adjustments to their height and tilt angle. This, together with the floating drum 52, ensures the overall structural stability and avoids terminal misalignment caused by mechanical vibration. At the same time, the floating correction frame 6, which is floatingly assembled at the bottom of the extension frame 51, moves down with the terminal. The bottom of the terminal first contacts the abutment groove on the top surface of the floating correction frame 6. Relying on the inclined guide surface of the abutment groove for limiting and correction, the exposed length of the bottom of all terminals is uniform. Then, the terminal moves vertically down along the guide surface, while the guide rod 61 and the return spring assembly adaptively slide, correcting the tilt angle of the terminal and achieving all-round correction of the terminal posture, height, and verticality before pressing.

[0033] While the upper mold completes the terminal clamping and correction operations, the lower mold assembly 2 completes the positioning and floating adaptation of the needle seat. The operator places the needle seat inside the contour cavity at the top of the fixed base 7. The bidirectional drive motor 88 in the bidirectional floating pressure head mechanism 8 starts, driving the spiral screw 87 with reverse thread structure at both ends to rotate, causing the concave slide frame 86 to move horizontally in opposite directions. The traction link 84 and the swing frame 83 are linked together, driving the two sets of clamping plates 85 to move closer to each other. The needle seat is self-clamped and fixed by the anti-slip texture on the inner side of the clamping plate 85, ensuring the stability of the basic posture of the needle seat during the pressing process.

[0034] During the alignment and pressing process, the floating correction frame 6 pulls the hinged hollow cylinder 81 to swing via the guide rod. This, combined with the sliding guide action of the movable shaft 82 within the hinged hollow cylinder 81 and the limiting guide action of the limiting strip and limiting groove, causes the entire pin seat to adaptively adjust its angle to follow the offset of the upper terminal. This achieves vertical alignment between the pin seat insertion hole, the terminal, and the abutment groove, completing bidirectional dynamic alignment compensation. After alignment, the pressing drive 5 continues to press down, driving the terminal to vertically insert into the pin seat insertion hole, completing the precision pressing assembly of a single-hole terminal. The fine-tuning, alignment, and pressing process is repeated, and with the horizontal sliding adjustment of the first cylinder 42, continuous assembly of multi-hole terminals can be completed sequentially.

[0035] In summary, the upper mold assembly 1 achieves flexible clamping, automatic posture adjustment, and floating correction of the terminals, while the lower mold assembly 2 achieves adaptive clamping and follow-up alignment of the pin holder. The bidirectional coupling of the upper and lower structures compensates for assembly errors, vibration errors, and feeding errors. While protecting the structural integrity of the precision workpiece, it significantly improves the accuracy, consistency, and production efficiency of the pressing assembly of the electronic connector pin holder and terminal.

[0036] Obviously, many modifications and variations can be made based on the contents of this specification. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A floating self-aligning pressing fixture for electronic connector pin headers and terminals, comprising an upper mold assembly (1) and a lower mold assembly (2) configured for alignment and mating, characterized in that: The upper mold assembly (1) includes a fixed frame (3), a sliding frame (4), a pressing drive (5), and a floating correction frame (6). The sliding frame (4) is embedded in one side of the fixed frame (3), and a slide plate (41) is slidably installed at the center of the sliding frame (4). A first cylinder (42) is installed between the rear end of the slide plate (41) and the inner wall of the sliding frame (4). The slide plate (41) is movably connected to the pressing drive (5). The pressing drive (5) is movably installed at the lower end of the slide plate (41) to realize automatic terminal clamping, displacement fine adjustment, and vertical pressing assembly operations. The floating correction frame (6) is floatingly installed at the bottom of the pressing drive (5) to adaptively correct the terminal offset angle and height before pressing. The lower mold assembly (2) includes a fixed base (7) and a bidirectional floating pressure head mechanism (8). The fixed base (7) is provided with a contoured cavity for placing the needle seat. The bidirectional floating pressure head mechanism (8) is located at the opening of the contoured cavity. It can adaptively clamp and limit the needle seat and cooperate with the upper mold assembly (1) to achieve bidirectional floating self-alignment, offset the pressing deviation, and complete the precise pressing of the terminal and the needle seat.

2. The floating self-aligning pressing fixture for electronic connector pin headers and terminals according to claim 1, characterized in that, The pressing drive component (5) includes an extension frame (51), and a floating cylinder (52) is fixedly installed at the overlapping end of the extension frame (51) and the slide plate (41). The floating cylinder (52) extends to the upper end of the extension frame (51) and is movably connected to a rotating cylinder (53). The bottom of the rotating drum (53) and the surface of the sliding plate (41) are provided with a micro drive motor (54). The outside of the rotating drum (53) is provided with an inclined guide ring groove, and the floating drum (52) is provided with a retaining shaft on the side corresponding to the inclined guide ring groove. The retaining shaft and the inclined guide ring groove form a sliding connection, and the rotational motion is converted into lifting motion.

3. The floating self-aligning pressing fixture for electronic connector pin headers and terminals according to claim 1, characterized in that, The toothed roller shaft (55) runs longitudinally through the end of the extension frame (51) away from the floating cylinder (52), and a needle-picking and clamping cylinder (56) for picking up and holding terminals is fixedly installed at the bottom of the toothed roller shaft (55). The internal cavity of the extension frame (51) is fitted with a full gear (57), which meshes with the outer teeth of the toothed roller shaft (55) for transmission. A second drive motor (58) is fixedly installed on the outer wall of the extension frame (51), and the output shaft of the second drive motor (58) is coaxially fixed with the full gear (57). The second drive motor (58) drives the full gear (57) to rotate, which in turn drives the toothed roller shaft (55) to rotate and rise, thereby driving the needle cylinder (56) to move vertically and make fine adjustments in sync, thus completing the automated picking, posture adjustment and pre-alignment of the terminals.

4. The floating self-aligning crimping fixture for electronic connector pin headers and terminals according to claim 3, characterized in that, Arc-shaped pressure frames (59) are movably installed on the inner walls of the front, back and sides of the syringe (56). A semi-cylinder (591) is embedded in the inner side of the arc-shaped pressure frame (59) from top to bottom. A spring coil (592) is installed on the side of the semi-cylinder (591) away from the opening end together with the inside of the arc-shaped pressure frame (59). An exposed rubber ball (593) is rotatably connected to the opening of the semi-cylinder (591), and the rubber ball (593) partially protrudes to the outside of the arc-shaped pressure frame (59). A movable abutment (510) is fixedly connected to the center of the outer wall of the arc-shaped pressure frame (59). The movable abutment (510) is provided with a slanted rail groove on the side away from the arc-shaped pressure frame (59) and extends to the outside of the syringe (56). By opening and closing multiple sets of arc-shaped pressure frames (59) simultaneously, and in conjunction with the elastic rotatable rubber ball (593), the terminal is flexibly wrapped and clamped, avoiding the problems of terminal plating scratches and pin extrusion deformation.

5. The floating self-aligning pressing fixture for electronic connector pin headers and terminals according to claim 4, characterized in that, The needle-taking cylinder (56) is sleeved with a longitudinally lifting cylinder (511), and a positioning plate is fixedly installed on the outside of the toothed roller shaft (55) and on the upper end of the needle-taking cylinder (56). The positioning plate and the upper end of the lifting cylinder (511) are jointly provided with a second cylinder (512). The cylinder wall of the lifting cylinder (511) and the movable abutment (510) are respectively provided with vertical slots on the left and right sides, and the abutment shaft fixedly installed at the center of the vertical slot is engaged in the corresponding inclined rail slot.

6. The floating self-aligning pressing fixture for electronic connector pin headers and terminals according to claim 1, characterized in that, The floating correction frame (6) is movably installed at the bottom of the extension frame (51), and guide rods (61) are fixedly installed at the center of the front and rear ends of the floating correction frame (6). The ends of the two sets of guide rods (61) extend to the outside of the fixed frame (3) and are fitted with a set of return springs around the outer perimeter. Several sets of abutment grooves are installed at equal intervals on the top surface of the floating correction frame (6), and the inner wall of one side of the abutment groove is inclined with a guide surface. The bottom of the terminal first presses against the abutment groove to force the length of the bottom of the terminal extending outward to be the same, and then moves along the inclined surface of the abutment groove and vertically penetrates the inside of the abutment groove to move downward vertically to avoid deviation.

7. The floating self-aligning pressing fixture for electronic connector pin headers and terminals according to claim 1, characterized in that, The bidirectional floating pressure head mechanism (8) includes hinged hollow cylinders (81) at both ends of the inner walls of the contoured cavity. One set of the hinged hollow cylinders (81) is hinged with a guide rod to the floating correction frame (6). A movable shaft (82) is installed through the interior of each set of hinged hollow cylinders (81). A limit strip is fixedly installed on the outer wall of the movable shaft (82) and slides in cooperation with the limit groove provided on the inner wall of the hinged hollow cylinder (81). A swing frame (83) is fixedly installed away from the hinged hollow cylinder (81) of each set of movable shafts (82). A connecting rod (84) is hinged in the middle of two adjacent sets of swing frames (83) in the same row, and a clamping plate (85) is hinged at the top of both of them.

8. The floating self-aligning crimping fixture for electronic connector pin headers and terminals according to claim 7, characterized in that, A concave slide frame (86) is sleeved through the center of the bottom of the two sets of connecting rods (84), and a spiral screw (87) is installed inside the concave slide frame (86). The two spiral screws (87) adopt a reverse thread structure, and a bidirectional drive motor (88) is installed between them to realize the floating limit of the needle seat.

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