Servo floating press-in mechanism

Abstract

The present application relates to the technical field of electronic automation production equipment, and particularly relates to a servo floating press-in mechanism, which comprises a rack system, a servo driving system, a pressure detection system and a multi-point adaptive floating press-in system. The rack system is provided with an L-shaped reinforcing seat for offsetting the backward torque. The servo driving system drives the mounting seat to move accurately through a servo motor. The pressure detection system comprises a pressure sensor fixed on the mounting seat. The floating press-in system comprises a floating block assembly installed below the mounting seat, and a plurality of independent floating ejector rods with compression springs are arranged in the assembly. A dynamic triggering gap is arranged between the ejector rod block and the pressure head of the pressure sensor, and an exhaust groove is arranged in the block body. The dynamic triggering gap cooperates with the pressure sensor to build a closed-loop control system, the press-in force is monitored in real time, the buckle breakage or pressure leakage is effectively prevented, and the yield and stability of product assembly are significantly improved.

Description

Technical Field

[0001] This invention relates to a servo-driven floating pressing mechanism for electronic automated production equipment assembling top covers. Background Technology

[0002] In the field of electronic automated production equipment, the automated assembly of electronic product covers is a key process to ensure the quality of finished products. Especially for cover products made of engineering plastics such as ABS and featuring multiple snap-fit ​​structures, the precision of the press-fit assembly directly affects the product's sealing performance and structural stability. Traditional press-fit mechanisms typically use cylinders as the power source, coupled with an integral press head. However, this existing technical solution has revealed several limitations in actual production. On the one hand, the motion characteristics of cylinder-driven systems make it difficult to achieve precise linear control of the pressing speed and pressure. During high-speed pressing, excessive instantaneous impact force can easily cause breakage of precision snaps or damage to the product surface. On the other hand, since existing press blocks are mostly rigid integral structures, they cannot effectively compensate for the snap height tolerances generated during the manufacturing process. This leads to uneven force during simultaneous multi-point pressing, frequently resulting in some snaps not being pressed in properly or being missed. Furthermore, such failures are random and difficult to eliminate through simple parameter adjustments. In addition, traditional mechanisms often lack real-time pressure feedback and closed-loop monitoring systems, making it impossible to dynamically capture abnormal stress states during the pressing process. Furthermore, the mechanism is prone to generating backward tilting torque under high load operations, leading to structural instability, which further reduces the assembly accuracy and yield. Summary of the Invention

[0003] This invention discloses a servo floating pressing mechanism, which aims to solve the problems mentioned above.

[0004] The present invention adopts the following solution:

[0005] A servo floating pressing mechanism includes a frame, a mounting base that can move up and down on the top of the frame, and a platform for pressing in snap-fit ​​products below the frame; it also includes: a pressure sensor fixed to the mounting base; and a floating pressing block mounted on the mounting base, with push rods adapted to the number of snap-fit ​​products on the floating pressing block; the floating pressing block is positioned above the platform, and the pressure sensor is positioned above the floating pressing block, with a gap between the pressure head of the pressure sensor and the upper surface of the floating pressing block; the floating pressing block can move up and down relative to the mounting base so that when the push rods press the snap-fit ​​products in, the upper surface of the floating pressing block can abut against the pressure head.

[0006] In this embodiment of the invention, the floating pressure block includes a mounting cavity, and the top rod is configured to move up and down within the mounting cavity, wherein the lower end of the top rod is configured to extend below the mounting cavity.

[0007] In this embodiment of the invention, a receiving cavity is provided within the mounting cavity, the receiving cavity being positioned above the mounting cavity, and a spring is provided within the receiving cavity. One end of the spring is configured to abut against the receiving cavity, and the other end of the spring is configured to abut against a push rod.

[0008] In this embodiment of the invention, the floating pressure block is further provided with an exhaust groove, one end of which is connected to the atmosphere, and the other end of which is configured to be connected to the receiving cavity.

[0009] In this embodiment of the invention, the floating pressure block includes a top rod pressure block and a pressure block distributed vertically. The lower end of the top rod pressure block is recessed upward to form an accommodating cavity. The pressure block is provided with a T-shaped groove that can form an installation cavity. The T-shaped groove passes through the upper and lower ends of the pressure block. The top rod is T-shaped so that the top rod can be confined within the installation groove.

[0010] In this embodiment of the invention, the frame includes a base set on the ground, a support plate vertically erected on the base, a reinforcing rib connected between the support plate and the base, the reinforcing rib being arranged on the front and / or rear side of the support plate, a slide being arranged above the front side of the support plate, and the mounting seat being arranged on the slide.

[0011] In this embodiment of the invention, an L-shaped reinforcing seat is arranged above one side of the support plate. One end of the reinforcing seat is configured to connect with one side of the support seat, and the other end of the reinforcing seat is configured to abut against the ground.

[0012] In this embodiment of the invention, guide rails are arranged on both sides of the slide, and the mounting base is configured to connect with the guide rails so that the mounting base can move linearly up and down relative to the slide.

[0013] In this embodiment of the invention, a servo motor is also included, which is configured to drive the mounting base to move up and down relative to the slide.

[0014] In this embodiment of the invention, a digital display module is configured on the rear side of the support plate, and the digital display module is configured to display the pressure value of the pressure sensor.

[0015] This invention provides a servo-driven floating pressing mechanism with the following advantages: Through the closed-loop feedback of a servo motor drive and a pressure sensor, precise control of the pressing speed and pressure throughout the pressing process is achieved. By setting a dynamically triggered gap between the floating pressing block and the pressure head, mechanical noise during the mechanism's start-up and no-load operation phases is filtered out, ensuring that the data collected by the pressure sensor accurately reflects the real-time force state of the latches. Multiple spring-loaded push rod structures achieve adaptive floating compensation during multi-point pressing, automatically absorbing height tolerances between the ABS cover latches using the elastic deformation of the springs, ensuring uniform force on each latch and solving the problems of uneven force and latch breakage caused by integral pressing blocks. The design of the venting groove eliminates air cushion resistance within the accommodating cavity, improving the sensitivity of floating compensation. The introduction of the L-shaped reinforcing seat significantly enhances the overall bending stiffness of the frame, offsetting the backward tilting moment under high loads and maintaining the structural stability and assembly accuracy of the mechanism during long-term operation. Through the synergistic effect of the above-mentioned technical means, this invention significantly reduces the defect rate of product assembly and improves the reliability of automated production lines. Attached Figure Description

[0016] To more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is the front view in an embodiment of the present invention.

[0018] Figure 2 This is a side view of an embodiment of the present invention.

[0019] Figure 3 This is a perspective view of an embodiment of the present invention.

[0020] Figure 4 This is a partially enlarged schematic diagram of an embodiment of the present invention.

[0021] 1. Base; 2. Support plate; 3. Reinforcing rib; 4. L-shaped reinforcing seat; 5. Slide; 6. Guide rail; 7. Mounting seat; 8. Servo motor; 9. Product; 10. Pressure sensor; 11. Pressure head; 12. Floating pressure block; 121. Top rod pressure block; 122. Pressure block; 13. Top rod; 14. Spring; 15. Gap; 16. Exhaust groove; 17. Platform; 18. Mounting cavity; 19. Digital display module; 20. Receiving cavity. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] Referring to the accompanying drawings, this invention provides a servo-floating pressing mechanism, primarily used to solve problems such as uneven pressing, breakage, or leakage caused by buckle height tolerances during the automated assembly of electronic products, such as ABS material top covers. This mechanism achieves precise dual control of pressing depth and pressure through deep coupling of a precision mechanical structure and a closed-loop control system.

[0024] In terms of the mechanical support structure, this embodiment constructs a high-rigidity frame system. The base of this system is a base 1, and a support plate 2 is vertically installed on the upper surface of the base 1 using high-strength bolts or welding. To enhance the stability of the support plate 2 under longitudinal loads, triangular reinforcing ribs 3 are welded between the support plate 2 and the base 1. Since the mechanism generates a large upward reaction force when performing the pressing action, an L-shaped reinforcing seat 4 is specially configured in this embodiment to prevent the support plate 2 from tilting backward. The horizontal section of the L-shaped reinforcing seat 4 is fixed to the high side of the support plate 2, and its vertical section extends downward and can eventually abut against the ground or external base through fine-tuning bolts. This structure transforms the bending moment originally acting on the root of the support plate 2 into pressure on the ground, thereby effectively suppressing the slight sway of the mechanism during high-pressure operation and ensuring the verticality of the pressing axis.

[0025] The servo drive system is installed on the front side of the support plate 2. The slide 5 is fixed on the support plate 2, and two parallel guide rails 6 are installed on its two sides. The mounting base 7 is slidably fitted onto the guide rails 6, and the slider on its back can engage with the guide rails. The drive source is a servo motor 8, which is mounted on the motor frame at the top of the slide 5. In one embodiment: the output shaft of the servo motor 8 is connected to a longitudinally arranged ball screw (not shown in the figure) through a diaphragm coupling, and the ball screw passes through a precision screw nut (not shown in the figure) inside the mounting base 7. When the servo motor 8 receives a control pulse to rotate, it drives the ball screw to rotate, thereby converting the rotational motion into the linear lifting motion of the mounting base 7 along the guide rails 6. Preferably, to ensure operational safety, a photoelectric limit switch is installed on the side of the slide 5 to sense the extreme position of the mounting base 7 and prevent the product 9 from being subjected to excessive pressure.

[0026] The coupling structure between the pressure detection system and the multi-point adaptive floating pressing system is the core of this invention. The pressure sensor 10 is fixed to the cantilevered bottom surface of the mounting base 7, with its sensing end facing downwards and a cylindrical pressure head 11 mounted on it. A floating pressure block 12 is suspended below the mounting base 7. The floating pressure block 12 can be connected to the mounting base 7 via guide posts, allowing it to move up and down on the mounting base in a certain manner. Preferably, when not in operation, the floating pressure block is at its lowest stroke position. In the initial state, a gap 15 with a thickness of 0.5mm-2.0mm is maintained between the upper surface of the floating pressure block 12 and the bottom surface of the pressure head 11; preferably, it can be 1mm or 1.5mm. The purpose of this gap 15 is to physically isolate the mechanical vibration and inertial impact generated by the mounting base 7 during the rapid descent phase, ensuring that the pressure sensor 10 only intervenes in signal acquisition when the actual pressing action begins, thereby filtering out invalid noise interference and preventing the pressure sensor from generating pressure data before pressing the product, which would lead to large errors.

[0027] The floating pressure block 12 is composed of a top rod pressure block 121 and a pressure block 122 stacked vertically. The top rod pressure block 121 has four independent receiving cavities 20 machined inside, each containing a spring 14, which can be a rectangular spring. The pressure block 122 is located below the top rod pressure block 121, and its interior has a T-shaped groove coinciding with the axis of the receiving cavity 20, forming a mounting cavity 18. Each top rod 13 is independently installed in its corresponding mounting cavity 18, with its top flange constrained between the stepped surface of the T-shaped groove and the bottom surface of the top rod pressure block 121. Each top rod corresponds to a snap-fit. The bottom end of the spring 14 presses against the top of the top rod 13, providing a downward preload. This design allows each of the four top rods 13 to have an independent floating stroke of 1-2 mm (preferably 1.5 mm) in the vertical direction. To eliminate air resistance during the floating process, an exhaust groove 16 is provided inside the push rod pressure block 121. One end of the exhaust groove 16 is connected to the receiving cavity 20, and the other end is open to the outside atmosphere. When the push rod 13 floats up due to force and compresses the spring 14, the air in the receiving cavity 20 is quickly discharged through the exhaust groove 16, ensuring the linearity and sensitivity of the floating response.

[0028] In practical applications, the organization's operating procedures are as follows: S1. The operator or robot places the ABS product 9 to be pressed into the positioning mold on the platform 17, which can be fixed to the front side of the frame located below the mounting base. The positioning mold is precisely contoured according to the product's outline to ensure that the four snap-fit ​​positions of the product accurately correspond to the centers of the four push rods 13 above.

[0029] S2. The host computer issues a start command, and the servo motor 8 drives the mounting base 7 to move the entire floating pressure system rapidly downward along the guide rail 6. At this time, the pressure sensor 10 does not bear the load due to the gap 15, and the digital display module 19 displays a pressure value of zero.

[0030] S3. When the bottom end of the ejector pin 13 contacts the product clip, the mounting base 7 can switch to the set low-speed pressing mode. Due to the unavoidable height tolerance of the ABS clips during injection molding, each ejector pin 13 will contact its corresponding clip sequentially. The contact resistance causes the ejector pin 13 to float upward against the elastic force of the spring 14. Through the differentiated compression of the spring 14, the height deviation between each clip is automatically compensated, ensuring that each ejector pin can fit tightly with its corresponding clip.

[0031] S4. As the mounting base 7 continues to press down, all four push rods 13 reach a balanced state. The reaction force on the floating pressure block 12 exceeds its own weight and the friction of the guide column 21, causing the floating pressure block 12 to slide upward relative to the mounting base 7. At this time, the gap 15 of dynamic triggering is eliminated, and the upper end face of the floating pressure block 12 presses against the pressure head 11.

[0032] S5. Pressure sensor 10 detects the force signal, and digital display module 19 begins to display the actual pressing force in real time. Servo motor 8 adjusts its output torque according to a preset constant pressure control algorithm, driving mounting base 7 to continue slowly pressing down until the pressure reaches the preset critical threshold. The specific control and electrical connection methods are the same as existing technologies and will not be described in detail again. During this process, the servo system monitors the pressure curve in real time. If the pressure changes abruptly or fails to reach the threshold, the system will automatically determine that the buckle is broken or missing and issue an alarm signal.

[0033] S6. After the pressing operation is completed, the servo motor 8 reverses, driving the mounting base 7 to rise back to the standby height. The push rod 13 is reset under the action of the spring 14, ready to enter the next cycle.

[0034] Through the synergistic effect of the aforementioned precision structures, this invention achieves micron-level control of the pressing stroke using a servo drive system, solves the problem of compensating for the height tolerance of multiple clips using a multi-point adaptive floating pressing system, constructs a closed-loop quality monitoring system using a pressure detection system, and finally ensures the rigidity requirements of the frame under high pressure using an L-shaped reinforcing seat 4. This technical solution fundamentally eliminates the speed shock and pressure fluctuations caused by cylinder drive, significantly improving the yield rate of precision electronic component assembly.

[0035] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A servo-floating press-in mechanism, comprising a frame, a vertically movable mounting base disposed above the frame, and a platform disposed below the frame for pressing in snap-fit ​​products; characterized in that, Also includes: A pressure sensor configured to be fixed on a mounting base; A floating pressure block, wherein the floating pressure block is configured on a mounting base and the floating pressure block is provided with a top rod adapted to the number of latches; The floating pressure block is positioned above the platform, and the pressure sensor is positioned above the floating pressure block. A gap can be formed between the pressure head of the pressure sensor and the upper surface of the floating pressure block. The floating pressure block can move up and down relative to the mounting base so that when the push rod presses the buckle into the product, the upper surface of the floating pressure block can press against the pressure head.

2. The servo-floating pressing mechanism according to claim 1, characterized in that, The floating pressure block includes a mounting cavity, and the push rod is configured to move up and down within the mounting cavity, wherein the lower end of the push rod is configured to extend below the mounting cavity.

3. The servo floating press-in mechanism according to claim 2, characterized in that, A receiving cavity is configured within the mounting cavity, the receiving cavity being positioned above the mounting cavity, and a spring is disposed within the receiving cavity, one end of the spring being configured to abut against the receiving cavity, and the other end of the spring being configured to abut against a push rod.

4. The servo-floating pressing mechanism according to claim 3, characterized in that, The floating pressure block is also equipped with an exhaust groove, one end of which is connected to the atmosphere, and the other end of which is configured to be connected to the receiving cavity.

5. A servo-floating pressing mechanism according to claim 4, characterized in that, The floating pressure block includes a top rod pressure block and a pressure block distributed vertically. The lower end of the top rod pressure block is recessed upward to form a receiving cavity. The pressure block is provided with a T-shaped groove that can form an installation cavity. The T-shaped groove passes through the upper and lower ends of the pressure block. The top rod is T-shaped so that the top rod can be confined within the installation groove.

6. A servo-floating press-in mechanism according to any one of claims 1-5, characterized in that, The frame includes a base set on the ground, a support plate vertically erected on the base, and a reinforcing rib connected between the support plate and the base. The reinforcing rib is arranged on the front and / or rear side of the support plate. A slide is arranged above the front side of the support plate, and the mounting seat is arranged on the slide.

7. A servo-floating press-in mechanism according to claim 6, characterized in that, An L-shaped reinforcing seat is arranged above one side of the support plate. One end of the reinforcing seat is configured to connect to one side of the support plate, and the other end of the reinforcing seat is configured to abut against the ground.

8. A servo-floating press-in mechanism according to claim 7, characterized in that, The slide is provided with guide rails on both sides, and the mounting base is configured to connect with the guide rails so that the mounting base can move linearly up and down relative to the slide.

9. A servo-floating pressing mechanism according to claim 8, characterized in that, It also includes a servo motor mounted on the slide, which is configured to drive the mounting base to move up and down relative to the slide.

10. A servo-floating press-in mechanism according to claim 9, characterized in that, A digital display module is configured on the rear side of the support plate, which displays the pressure value of the pressure sensor.

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