A piston pin coaxiality detection and correction integrated device

Abstract

This invention belongs to the technical field of piston pin processing equipment, and particularly to an integrated device for piston pin coaxiality detection and correction. It includes a frustum, on the upper surface of which is provided with an array of grooves distributed along the circumference. These grooves are used to hold piston pins to be processed. A ring plate is mounted on the top of a support rod fixedly connected to the upper surface of the frustum. A toothed ring is rotatably connected to the inner wall of the ring plate, and a coaxiality detection and correction mechanism is fixedly connected to the lower surface of the toothed ring. When the toothed ring rotates, it drives the coaxiality detection and correction mechanism to rotate circumferentially, thereby realizing the detection and correction of the piston pins in the grooves. This invention, by setting up a frustum, a ring plate, a controller, a toothed ring, a coaxiality detection and correction mechanism, and a turntable, can quickly detect and correct multiple piston pins in use, and the detection and correction are performed at the same station. This solves the problems of existing piston pin coaxiality detection and correction methods requiring separation, low production efficiency, and easy damage to the workpiece.

Description

Technical Field

[0001] This invention relates to the field of piston pin processing equipment technology, specifically to an integrated device for piston pin coaxiality detection and correction. Background Technology

[0002] Piston pins are critical connecting components between the engine piston and connecting rod, and their coaxiality accuracy directly affects the engine's assembly precision, operational stability, and service life. Currently, in piston pin manufacturing, coaxiality testing and calibration are mostly performed separately. First, dedicated testing equipment is used to check the coaxiality of the piston pins, and defective products are screened out before being transferred to calibration equipment for correction. This separate operation not only requires multiple machines, occupying production space, but also adds workpiece transfer steps, leading to low production efficiency. Furthermore, the transfer process may cause surface damage to the piston pins, affecting product quality. At the same time, existing calibration equipment is mostly manually operated, and the calibration accuracy depends on the operator's experience, making it difficult to guarantee consistency and meet the demands of large-scale, high-precision production. Therefore, there is an urgent need for a device that can integrate piston pin coaxiality testing and calibration to solve the above-mentioned technical problems. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides an integrated device for detecting and correcting the coaxiality of piston pins. By incorporating a frustum, annular plate, controller, gear ring, coaxiality detection and correction mechanism, and turntable, it can quickly detect and correct multiple piston pins in the same station, solving the problems of existing methods requiring separate detection and correction, low production efficiency, and easy damage to workpieces.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0007] An integrated device for detecting and correcting the coaxiality of piston pins includes a frustum. The upper surface of the frustum has an array of grooves distributed along the circumferential direction. The grooves are used to place the piston pins to be processed. An annular plate is installed on the top of a support rod fixedly connected to the upper surface of the frustum. A toothed ring is rotatably connected to the inner wall of the annular plate, and a coaxiality detection and correction mechanism is fixedly connected to the lower surface of the toothed ring. When the toothed ring rotates, it drives the coaxiality detection and correction mechanism to rotate circumferentially, thereby realizing the detection and correction of the piston pins at the grooves.

[0008] Furthermore, a circular groove is formed at the center of the upper surface of the truncated cone, and a through hole is formed in the circular groove of the truncated cone, through which a circular rod is inserted. One end of the circular rod extends into the groove and is fixedly connected to an arc-shaped clamping block. A first rubber pad is fixedly connected to one side of the groove, and a second rubber pad is fixedly connected to one side of the arc-shaped clamping block. The piston pin is clamped between the first rubber pad and the second rubber pad.

[0009] Furthermore, a rotating shaft is rotatably connected to the center of the truncated cone, and the top of the rotating shaft extends into the circular groove and is fixedly connected to a turntable. Support arms are rotatably connected between the side wall of the turntable and the corresponding circular rod. When the turntable rotates, the circular rod can be extended or retracted through the support arms to realize the movement control of the arc-shaped clamping block.

[0010] Furthermore, the bottom of the rotating shaft extends to the lower part of the truncated cone and is fixedly connected to a second gear. A clamping drive mechanism for controlling the rotation of the second gear is installed on the lower surface of the truncated cone. The clamping drive mechanism includes a rack, a pneumatic push rod, and a guide rail. The guide rail is fixedly connected to the lower surface of the truncated cone. The rack is slidably connected to the guide rail by a slider provided on one side and meshes with the second gear. The pneumatic push rod is installed on the lower surface of the truncated cone, and a traction seat is fixedly connected between the end of the pneumatic push rod output shaft and the rack.

[0011] Furthermore, a protective sleeve is fixedly connected to the lower surface of the frustum outside the clamping drive mechanism.

[0012] Furthermore, the coaxiality detection and correction mechanism includes a mounting frame, two correction cylinders symmetrically mounted on the mounting frame, and an arc-shaped correction block fixedly connected to the output shaft end of the correction cylinder for correcting the piston pin. A fixing connector is fixedly connected between the top of the mounting frame and the lower surface of the gear ring. A laser displacement sensor is mounted on the upper inner side of the mounting frame, and a controller is mounted on one side of the annular plate. The output end of the laser displacement sensor is electrically connected to the input end of the controller, and the output end of the controller is electrically connected to the input end of the correction cylinder.

[0013] Furthermore, a rotary drive mechanism for controlling the rotation of the gear ring is installed on one side of the annular plate. The rotary drive mechanism includes a mounting plate fixedly connected to the annular plate and a motor mounted on the mounting plate. A first gear is fixedly connected to the end of the motor output shaft, and the first gear meshes with the gear ring.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, the present invention provides an integrated device for detecting and correcting the coaxiality of piston pins, which has the following advantages:

[0016] 1. This invention integrates coaxiality detection and correction functions into a single device, enabling piston pin detection and correction to be completed at the same station. This completely solves the problems of cumbersome operation and low production efficiency caused by the separation of detection and correction in existing technologies. It eliminates the need to transfer workpieces, significantly shortening the processing flow and avoiding surface scratches, bumps, and other damage that may occur during workpiece transfer, effectively ensuring the processing quality of the piston pins. Furthermore, the array of grooves on the circular platform can simultaneously hold multiple piston pins. Combined with the synchronous clamping function of the clamping drive mechanism, it enables simultaneous detection and correction of multiple piston pins, significantly improving production efficiency and adapting to the needs of large-scale batch production.

[0017] 2. This invention employs a laser displacement sensor linked with a controller. The laser displacement sensor can detect the coaxiality deviation of the piston pin in real time with high precision and accurately transmit the detection data to the controller. The controller automatically calculates the correction amount based on the deviation data and drives the correction cylinder to move the arc-shaped correction block for precise correction, replacing the traditional manual correction method. This not only reduces the labor intensity of operators but also avoids correction errors caused by manual operation, ensuring the correction accuracy and consistency of each piston pin. Simultaneously, the cooperative arrangement of the first and second rubber pads forms a flexible clamping structure, which not only ensures a firm grip on the piston pin but also effectively buffers the clamping force, preventing damage to the piston pin surface and further improving the product qualification rate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 For the present invention Figure 1 Enlarged view of the structure at point A in the middle;

[0020] Figure 3 For the present invention Figure 1 Enlarged view of the structure at point B;

[0021] Figure 4 This is a bottom-view perspective view of the disassembled invention.

[0022] Figure 5 This is a schematic diagram of the structure of the second gear and the clamping drive mechanism in this invention;

[0023] Figure 6 This is a schematic diagram of the coaxiality detection and correction mechanism in this invention;

[0024] Figure 7 This is a schematic diagram of the rotary drive mechanism in this invention.

[0025] In the diagram: 1. Frustum; 2. Protective sleeve; 3. Support rod; 4. Annular plate; 5. Controller; 6. Gear ring; 7. Rotary drive mechanism; 701. Mounting plate; 702. Motor; 703. First gear; 8. Coaxiality detection and correction mechanism; 801. Mounting bracket; 802. Correction cylinder; 803. Arc-shaped correction block; 804. Laser displacement sensor; 805. Fixed connector; 9. First rubber pad; 10. Groove; 11. Second rubber pad; 12. Arc-shaped clamping block; 13. Circular groove; 14. Circular rod; 15. Support arm; 16. Rotating shaft; 17. Turntable; 18. Second gear; 19. Clamping drive mechanism; 20. Rack; 21. Traction seat; 22. Pneumatic push rod; 23. Guide rail. Detailed Implementation

[0026] 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. 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.

[0027] Example

[0028] like Figures 1-7 As shown in the figure, an embodiment of the present invention proposes an integrated device for detecting and correcting the coaxiality of piston pins, including a frustum 1. The upper surface of the frustum 1 has an array of grooves 10 distributed along the circumferential direction. The grooves 10 are used to place the piston pins to be processed. The top of the support rod 3 fixedly connected to the upper surface of the frustum 1 is equipped with an annular plate 4. A toothed ring 6 is rotatably connected to the inner wall of the annular plate 4. The lower surface of the toothed ring 6 is fixedly connected to a coaxiality detection and correction mechanism 8. When the toothed ring 6 rotates, it drives the coaxiality detection and correction mechanism 8 to rotate circumferentially, thereby realizing the detection and correction of the piston pins at the grooves 10.

[0029] It should be noted that grooves 10 are arranged along the circumference of the frustum 1 for batch placement of piston pins; the support rod 3 supports the annular plate 4 to maintain stability, and the toothed ring 6 on the inner wall of the annular plate 4 can rotate freely. When the toothed ring 6 rotates, it drives the coaxiality detection and correction mechanism 8 below to perform circumferential motion, and sequentially completes the coaxiality detection and correction of the piston pin in each groove 10, realizing integrated continuous operation.

[0030] like Figure 1 , Figure 2 and Figure 3As shown, in some embodiments, a circular groove 13 is provided at the center of the upper surface of the frustum 1, and a through hole is provided in the circular groove 13 of the frustum 1 to the groove 10. A circular rod 14 is inserted into the through hole, one end of the circular rod 14 extends into the groove 10 and is fixedly connected to an arc-shaped clamping block 12. A first rubber pad 9 is fixedly connected to one side of the groove 10, and a second rubber pad 11 is fixedly connected to one side of the arc-shaped clamping block 12. A piston pin is clamped between the first rubber pad 9 and the second rubber pad 11.

[0031] It should be noted that a circular groove 13 is opened in the center of the truncated cone 1, and the through hole provides a moving channel for the circular rod 14. The circular rod 14 extends and retracts along the through hole, driving the arc-shaped clamping block 12 to move inward to the inside of the groove 10. In conjunction with the first rubber pad 9 on one side of the groove 10, the piston pin is clamped between the first rubber pad 9 and the second rubber pad 11. The rubber pad plays a flexible buffering role to avoid damage to the surface of the piston pin during clamping.

[0032] like Figure 1 and Figure 3 As shown, in some embodiments, a rotating shaft 16 is rotatably connected to the center of the frustum 1. The top of the rotating shaft 16 extends into the circular groove 13 and is fixedly connected to a turntable 17. A support arm 15 is rotatably connected between the side wall of the turntable 17 and the corresponding circular rod 14. When the turntable 17 rotates, the circular rod 14 can be extended or retracted through the support arm 15 to realize the movement control of the arc-shaped clamping block 12.

[0033] It should be noted that the rotating shaft 16 drives the turntable 17 to rotate within the circular groove 13. When the turntable 17 rotates, it drives the support arm 15 to move in tandem. The support arm 15 pushes and pulls the circular rod 14 to achieve telescopic movement, thereby controlling the clamping and loosening of the arc-shaped clamping block 12, completing the automatic clamping and positioning of the piston pin, and ensuring that the workpiece does not deviate during inspection and correction.

[0034] like Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, the bottom of the rotating shaft 16 extends to the lower part of the frustum 1 and is fixedly connected to the second gear 18. The lower surface of the frustum 1 is equipped with a clamping drive mechanism 19 for controlling the rotation of the second gear 18. The clamping drive mechanism 19 includes a rack 20, a pneumatic push rod 22 and a guide rail 23. The guide rail 23 is fixedly connected to the lower surface of the frustum 1. The rack 20 is slidably connected to the guide rail 23 by a slider provided on one side. The rack 20 meshes with the second gear 18. The pneumatic push rod 22 is installed on the lower surface of the frustum 1, and a traction seat 21 is fixedly connected between the end of the output shaft of the pneumatic push rod 22 and the rack 20.

[0035] It should be noted that the pneumatic push rod 22 pulls the rack 20 through the traction seat 21. The rack 20 slides smoothly on the guide rail 23. The rack 20 meshes with the second gear 18 to drive the second gear 18 to rotate. The second gear 18 synchronously drives the rotating shaft 16 to rotate, and the turntable 17 to rotate, providing stable power for the clamping action of the piston pin and realizing the automated control of the clamping action.

[0036] like Figure 1 and Figure 4 As shown, in some embodiments, a protective sleeve 2 is fixedly connected to the lower surface of the frustum 1 outside the clamping drive mechanism 19.

[0037] It should be noted that the protective sleeve 2 is fixed on the lower surface of the frustum 1 and wraps around the outside of the clamping drive mechanism 19 to prevent dust and debris from entering the inside of the clamping drive mechanism 19.

[0038] like Figure 1 , Figure 4 and Figure 6 As shown, in some embodiments, the coaxiality detection and correction mechanism 8 includes a mounting frame 801, two correction cylinders 802 symmetrically mounted on the mounting frame 801, and an arc-shaped correction block 803 fixedly connected to the output shaft end of the correction cylinder 802 for correcting the piston pin. A fixing connector 805 is fixedly connected between the top of the mounting frame 801 and the lower surface of the gear ring 6. A laser displacement sensor 804 is mounted on the upper inner side of the mounting frame 801. A controller 5 is mounted on one side of the annular plate 4. The output end of the laser displacement sensor 804 is electrically connected to the input end of the controller 5, and the output end of the controller 5 is electrically connected to the input end of the correction cylinder 802.

[0039] It should be noted that the fixed connector 805 fixes the mounting bracket 801 below the toothed ring 6, and the laser displacement sensor 804 detects the coaxiality data of the piston pin in real time and transmits the signal to the controller 5. After analyzing the deviation, the controller 5 sends a command to the correction cylinder 802. The correction cylinder 802 pushes the arc-shaped correction block 803 to perform precise squeezing correction on the deviation part of the piston pin, thereby realizing closed-loop control of detection and correction.

[0040] like Figure 1 , Figure 4 and Figure 7 As shown, in some embodiments, a rotary drive mechanism 7 for controlling the rotation of the gear ring 6 is installed on one side of the annular plate 4. The rotary drive mechanism 7 includes a mounting plate 701 fixedly connected to the annular plate 4 and a motor 702 mounted on the mounting plate 701. A first gear 703 is fixedly connected to the end of the output shaft of the motor 702, and the first gear 703 meshes with the gear ring 6.

[0041] It should be noted that the mounting plate 701 provides a fixed support for the motor 702. The operation of the motor 702 drives the first gear 703 to rotate. The first gear 703 meshes with the gear ring 6 to drive the gear ring 6 to rotate at a constant speed along the inner wall of the annular plate 4, thereby driving the coaxiality detection and correction mechanism 8 to move cyclically, so as to realize the sequential detection and correction of multiple piston pins.

[0042] It should also be noted that the laser displacement sensor 804 in this solution is model optoNCDT1402; the controller 5 is model S7-200SMART.

[0043] The working principle and usage steps of this invention are as follows: First, place the piston pin into the grooves 10 arranged in a circular array on the frustum 1. Then, activate the clamping drive mechanism 19. The pneumatic push rod 22 drives the rack 20 to slide along the guide rail 23 via the traction seat 21. The rack 20 meshes with and drives the second gear 18 to rotate. The second gear 18 drives the rotating shaft 16 and the turntable 17 to rotate. The turntable 17 pushes the round rod 14 out via the support arm 15, causing the arc-shaped clamping block 12 to engage with the first rubber pad 9 and the second rubber pad 11 to clamp the piston pin. Then, activate the rotation drive mechanism 19. The moving mechanism 7 and the motor 702 drive the first gear 703 to rotate. The first gear 703 meshes and drives the gear ring 6 to rotate along the inner wall of the annular plate 4. The gear ring 6 drives the coaxiality detection and correction mechanism 8 to rotate in a circle. The laser displacement sensor 804 detects the coaxiality of the piston pin in real time and transmits the signal to the controller 5. The controller 5 drives the correction cylinder 802 to act according to the deviation data. The correction cylinder 802 pushes the arc-shaped correction block 803 to complete the piston pin correction. After all the processes are completed, the mechanisms are reset, the arc-shaped clamping block 12 is released, and the workpiece can be taken out.

[0044] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated device for detecting and correcting the coaxiality of piston pins, characterized in that: The device includes a frustum (1), on the upper surface of which grooves (10) are arranged in an array along the circumferential direction. The grooves (10) are used to place the piston pin to be processed. A ring plate (4) is installed on the top of a support rod (3) fixedly connected to the upper surface of the frustum (1). A toothed ring (6) is rotatably connected to the inner wall of the ring plate (4). A coaxiality detection and correction mechanism (8) is fixedly connected to the lower surface of the toothed ring (6). When the toothed ring (6) rotates, it drives the coaxiality detection and correction mechanism (8) to rotate in a circle, thereby realizing the detection and correction of the piston pin at the groove (10).

2. The integrated device for detecting and correcting the coaxiality of piston pins according to claim 1, characterized in that: A circular groove (13) is provided at the center of the upper surface of the truncated cone (1), and a through hole is provided at the circular groove (13) of the truncated cone (1) to the groove (10). A circular rod (14) is inserted into the through hole. One end of the circular rod (14) extends into the groove (10) and is fixedly connected to an arc-shaped clamping block (12). A first rubber pad (9) is fixedly connected to one side of the groove (10), and a second rubber pad (11) is fixedly connected to one side of the arc-shaped clamping block (12). A piston pin is clamped between the first rubber pad (9) and the second rubber pad (11).

3. The integrated device for detecting and correcting the coaxiality of piston pins according to claim 2, characterized in that: A rotating shaft (16) is rotatably connected to the center of the truncated cone (1). The top of the rotating shaft (16) extends into the circular groove (13) and is fixedly connected to a turntable (17). A support arm (15) is rotatably connected between the side wall of the turntable (17) and the corresponding circular rod (14). When the turntable (17) rotates, the circular rod (14) can be extended and retracted through the support arm (15) to realize the movement control of the arc-shaped clamping block (12).

4. The integrated device for detecting and correcting the coaxiality of piston pins according to claim 3, characterized in that: The bottom of the rotating shaft (16) extends to the bottom of the frustum (1) and is fixedly connected to the second gear (18). The lower surface of the frustum (1) is equipped with a clamping drive mechanism (19) for controlling the rotation of the second gear (18). The clamping drive mechanism (19) includes a rack (20), a pneumatic push rod (22) and a guide rail (23). The guide rail (23) is fixedly connected to the lower surface of the frustum (1). The rack (20) is slidably connected to the guide rail (23) by a slider provided on one side. The rack (20) meshes with the second gear (18). The pneumatic push rod (22) is installed on the lower surface of the frustum (1). The end of the output shaft of the pneumatic push rod (22) is fixedly connected to the rack (20) with a traction seat (21).

5. The integrated device for detecting and correcting the coaxiality of piston pins according to claim 4, characterized in that: The lower surface of the frustum (1) is fixedly connected to a protective sleeve (2) on the outside of the clamping drive mechanism (19).

6. The integrated device for detecting and correcting the coaxiality of piston pins according to claim 1, characterized in that: The coaxiality detection and correction mechanism (8) includes a mounting frame (801), two correction cylinders (802) symmetrically mounted on the mounting frame (801), and an arc-shaped correction block (803) fixedly connected to the output shaft end of the correction cylinder (802) for correcting the piston pin. A fixing connector (805) is fixedly connected between the top of the mounting frame (801) and the lower surface of the gear ring (6). A laser displacement sensor (804) is installed on the upper inner side of the mounting frame (801), and a controller (5) is installed on one side of the annular plate (4). The output end of the laser displacement sensor (804) is electrically connected to the input end of the controller (5), and the output end of the controller (5) is electrically connected to the input end of the correction cylinder (802).

7. The integrated device for detecting and correcting the coaxiality of piston pins according to claim 1, characterized in that: A rotary drive mechanism (7) for controlling the rotation of the gear ring (6) is installed on one side of the annular plate (4). The rotary drive mechanism (7) includes a mounting plate (701) fixedly connected to the annular plate (4) and a motor (702) mounted on the mounting plate (701). A first gear (703) is fixedly connected to the end of the output shaft of the motor (702), and the first gear (703) meshes with the gear ring (6).

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