Pneumatic press-in mechanism for connecting rod bushings

Abstract

This utility model relates to the technical field of connecting rod bushing processing equipment, and discloses a pneumatic pressing mechanism for connecting rod bushings. It includes a mounting plate, a fixture fixedly connected to the inner side of the mounting plate, an operating handle fixedly connected to the top of the fixture, and a pressing assembly on the mounting plate. The pressing assembly includes two sets of cylinders, each fixedly connected to both sides of the mounting plate. The telescopic ends of the cylinders movably penetrate both sides of the mounting plate and are fixedly connected to pistons. In this utility model, by setting up the pressing assembly, the cylinders drive the pistons to move within the placement holes of the conical seat, achieving precise pressing of the bushing. The stable power output of the cylinders ensures the uniformity and consistency of the pressing process, effectively avoiding errors caused by manual operation. Simultaneously, the cooperation of the piston with the limiting ring and the moving ring precisely controls the pressing stroke, preventing over- or under-pressing of the bushing, thus improving product quality and production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of connecting rod bushing processing equipment, and in particular to a pneumatic pressing mechanism for connecting rod bushings. Background Technology

[0002] The connecting rod bushing pneumatic press-fit mechanism is a specialized piece of equipment used in the mechanical manufacturing industry, particularly in the assembly of automotive engine components. Powered by a pneumatic system, it uses the extension and retraction of cylinders to precisely press the bushing into the designated position on the connecting rod. This mechanism combines mechanical structural design with automated control technology, aiming to improve assembly efficiency, ensure assembly accuracy, and reduce errors caused by manual operation.

[0003] In existing connecting rod bushing assembly processes, manual or semi-automatic methods are typically used. First, the operator places the bushing in its assembly position on the connecting rod, then applies pressure using hand tools or simple mechanical devices to press the bushing into the connecting rod. This process requires the operator to adjust the positions of the connecting rod and bushing multiple times to ensure assembly accuracy. Manual assembly relies heavily on the operator's experience and skill, and each step requires careful calibration to ensure the bushing is accurately pressed into its intended position.

[0004] In existing assembly processes, manually placing and adjusting the bushings has significant limitations. Due to reliance on manual operation, assembly accuracy and consistency are difficult to guarantee, easily leading to inaccurate bushing placement or inconsistent pressing depth. This not only affects the assembly quality of the connecting rod but may also cause malfunctions during subsequent use. Therefore, a pneumatic pressing mechanism for connecting rod bushings is proposed to solve these problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a pneumatic pressing mechanism for connecting rod bushings, which aims to solve the problems of low precision, low efficiency and poor consistency in manual assembly in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a pneumatic pressing mechanism for connecting rod bushings, including a mounting plate, a fixture fixedly connected to the inner side of the mounting plate, and an operating handle fixedly connected to the top of the fixture; The mounting plate is equipped with a pressing assembly, which includes two sets of cylinders. The cylinders are fixedly connected to both sides of the mounting plate. The telescopic ends of the cylinders movably pass through both sides of the mounting plate and are fixedly connected to pistons. Conical seats are fixedly connected to the inner walls of both sides of the mounting plate. Placement holes are opened on the end faces of the conical seats. The pistons are located on the inner walls of the placement holes. A placement seat is threadedly connected to the front of the fixture via bolts. A connecting rod is placed on the top of the placement seat. A part limiting groove is opened on the top of the placement seat. The connecting rod is placed on the inner wall of the part limiting groove. A positioning assembly is provided on the fixture. The operating handle is electrically connected to the cylinders. A moving ring is fixedly connected to the outer surface of the piston. A limiting ring is fixedly connected to the inner wall of the placement seat. The outer surface of the moving ring contacts the inner wall of the placement hole. The moving ring and the limiting ring are configured to cooperate.

[0007] As a further description of the above technical solution: the positioning component includes an extension plate, the back of which is fixedly connected to the front of the fixture, and a threaded rod is rotatably connected to the top of the extension plate via a bearing. A threaded sleeve is threadedly connected to the surface of the threaded rod, a fixing rod is fixedly connected to the outer side of the threaded sleeve, and a positioning clamp is fixedly connected to the bottom end of the fixing rod.

[0008] As a further description of the above technical solution: a slider is fixedly connected to the back of the fixture, and a groove is provided on the front of the placement seat. The outer wall of the slider is slidably connected to the inner wall of the groove.

[0009] As a further description of the above technical solution: a knob is fixedly connected to the top end of the threaded rod.

[0010] As a further description of the above technical solution: the placement seat is "h" shaped, and the bottom of the component limiting groove and the positioning fixture are both semi-circular.

[0011] As a further description of the above technical solution: a rubber pad is fixedly connected to the bottom semi-circular part of the positioning fixture. The rubber pad is arc-shaped, and the bottom of the rubber pad is in contact with the outer surface of the connecting rod.

[0012] As a further description of the above technical solution: the electrical signal of the operating handle is compatible with the electrical signal of the cylinder, and the signal receiving end circuit of the operating handle and the cylinder is connected.

[0013] As a further description of the above technical solution: the fixing rod is L-shaped, and there are two sets of fixing rods, positioning clamps and rubber pads, with the two sets of fixing rods, positioning clamps and rubber pads symmetrically arranged on both sides of the fixture.

[0014] This utility model has the following beneficial effects: 1. In this utility model, by setting up a pressing component, the piston driven by the cylinder moves within the placement hole of the conical seat to achieve precise pressing of the bushing. The stable power output of the cylinder ensures the uniformity and consistency of the pressing process, effectively avoiding errors caused by manual operation. At the same time, the cooperation between the piston, the limiting ring, and the moving ring precisely controls the pressing stroke, preventing the bushing from being pressed in too much or too little, thereby improving product quality and production efficiency.

[0015] 2. In this utility model, by setting up a positioning component, the connecting rod is precisely positioned and clamped by the cooperation of a threaded rod, a threaded sleeve, a fixed rod, a positioning fixture, and a rubber pad. The rotation of the threaded rod can adjust the position of the positioning fixture to adapt to connecting rods of different sizes, thereby improving the versatility of the equipment. The flexible clamping force of the rubber pad can protect the surface of the connecting rod from damage, while ensuring stable clamping and preventing the connecting rod from shifting during the pressing process, further improving the pressing accuracy and reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the pneumatic pressing mechanism for the connecting rod bushing proposed in this utility model; Figure 2 This is a schematic diagram of the structure of the connecting rod after it has been unloaded in the pneumatic pressing mechanism for the connecting rod bushing proposed in this utility model. Figure 3 This is a schematic diagram of the fixture in the pneumatic pressing mechanism for connecting rod bushings proposed in this utility model; Figure 4 This is a cross-sectional schematic diagram of the conical seat in the pneumatic pressing mechanism for the connecting rod bushing proposed in this utility model; Figure 5 This is a schematic diagram of the positioning component of the pneumatic pressing mechanism for the connecting rod bushing proposed in this utility model.

[0017] Legend: 1. Mounting plate; 2. Operating handle; 3. Fixture; 4. Threaded rod; 5. Conical seat; 6. Cylinder; 7. Placement seat; 8. Connecting rod; 9. Piston; 10. Part limiting groove; 11. Positioning clamp; 12. Fixing rod; 13. Slider; 14. Extension plate; 15. Threaded sleeve; 16. Slide groove; 17. Knob; 18. Rubber pad; 19. Limiting ring; 20. Moving ring. Detailed Implementation

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

[0019] Reference Figure 1 , Figure 2 The present invention provides an embodiment of a pneumatic pressing mechanism for a connecting rod bushing, comprising a mounting plate 1, with a fixture 3 fixedly connected to the inner side of the mounting plate 1. This fixed connection ensures the stability of the fixture 3 on the mounting plate 1, enabling the fixture 3 to withstand the force generated during the pressing process. An operating handle 2 is fixedly connected to the top of the fixture 3 for easy manual control by the operator. A pressing assembly is provided on the mounting plate 1 to realize the pressing action of the bushing. The pressing assembly includes two sets of cylinders 6, which are fixedly connected to both sides of the mounting plate 1 respectively. This symmetrical arrangement ensures a uniform distribution of the pressing force. The electrical signal of the operating handle 2 is compatible with the electrical signal of the cylinders 6. This signal compatibility ensures the operator's control of the pressing action. Handle 2 can precisely control the movement of cylinder 6. The operating handle 2 is connected to the signal receiving end of cylinder 6 by circuit. The circuit connection allows the operating handle 2 to transmit electrical signals to cylinder 6 to achieve remote control. The telescopic end of cylinder 6 moves through both sides of mounting plate 1 and is fixedly connected to piston 9. The fixed connection of piston 9 allows it to move synchronously with the telescopic end of cylinder 6. Conical seats 5 are fixedly connected to the inner walls of both sides of mounting plate 1. The fixed connection of conical seats 5 provides guidance and support for the movement of piston 9. The end face of conical seat 5 is provided with a placement hole for placing bushing to ensure accurate positioning of bushing during pressing. Piston 9 is located on the inner wall of the placement hole and can directly act on bushing to complete the pressing action.

[0020] Reference Figure 3 , Figure 4 The jig 3 has a mounting base 7 connected to its front side via bolt threads. This bolt thread connection facilitates the installation and disassembly of the mounting base 7, making maintenance and replacement convenient. The mounting base 7 is "h"-shaped, allowing for better placement and positioning of the connecting rod 8. The connecting rod 8 is placed on top of the mounting base 7, and its position determines the accuracy of the bushing press-in. A component limiting groove 10 is provided on the top of the mounting base 7, and the connecting rod 8 is placed on the inner wall of the component limiting groove 10. The component limiting groove 10 is designed to initially position the connecting rod 8, preventing displacement during press-in. A positioning component is provided on the jig 3 for further fixation. The position of the connecting rod 8 ensures the stability of the pressing process. A movable ring 20 is fixedly connected to the outer surface of the piston 9. The fixed connection of the movable ring 20 allows it to move synchronously with the piston 9. A limit ring 19 is fixedly connected to the inner wall of the placement seat 7. The fixed connection of the limit ring 19 provides a limiting function for the movement of the movable ring 20, preventing the piston 9 from excessively extending or retracting. The outer surface of the movable ring 20 contacts the inner wall of the placement hole. This contact method ensures that the movable ring 20 can accurately limit the movement range of the piston 9. The movable ring 20 and the limit ring 19 are set together to effectively control the movement stroke of the piston 9 and ensure the accuracy of the pressing action.

[0021] Reference Figure 3 , Figure 5 The positioning assembly includes an extension plate 14, the back of which is fixedly connected to the front of the fixture 3. This fixed connection provides a stable mounting base for the positioning assembly. A threaded rod 4 is rotatably connected to the top of the extension plate 14 via a bearing. This rotatable connection allows the threaded rod 4 to rotate flexibly, facilitating the adjustment of the positioning fixture 11. A knob 17 is fixedly connected to the top of the threaded rod 4, allowing the operator to manually rotate the threaded rod 4 to adjust the positioning assembly. A threaded sleeve 1 is threadedly connected to the surface of the threaded rod 4. 5. The threaded connection allows the threaded sleeve 15 to move up and down by rotating the threaded rod 4, thereby driving the positioning clamp 11 to adjust its position. A fixed rod 12 is fixedly connected to the outer side of the threaded sleeve 15, which can transmit the movement of the threaded sleeve 15 to the positioning clamp 11. The bottom end of the fixed rod 12 is fixedly connected to the positioning clamp 11. The fixed connection of the positioning clamp 11 allows it to firmly clamp the connecting rod 8. A slider 13 is fixedly connected to the back of the clamp. The fixed connection of the slider 13 allows it to slide in the slide groove 16, ensuring the smooth movement of the positioning clamp 11.

[0022] Reference Figure 3 , Figure 5 The front of the placement seat 7 has a sliding groove 16, which provides a sliding track for the slider 13 and restricts the movement direction of the positioning clamp 11. The outer wall of the slider 13 is slidably connected to the inner wall of the sliding groove 16. This sliding connection allows the positioning clamp 11 to move smoothly along the sliding groove 16, ensuring the accuracy of the clamping position. The bottom of both the component limiting groove 10 and the positioning clamp 11 is semi-circular. This semi-circular design can better fit the shape of the connecting rod 8 and improve the stability of the clamping. A rubber pad 18 is fixedly connected to the semi-circular part of the bottom of the positioning clamp 11. The fixed connection of the rubber pad 18 allows it to make close contact with the outer surface of the connecting rod 8, providing flexible clamping force and preventing damage to the surface of the connecting rod 8. The rubber pad 18 is arc-shaped, which further improves the fit with the connecting rod 8 and ensures the clamping effect. The bottom of the rubber pad 18 contacts the outer surface of the connecting rod 8. This contact method can effectively protect the surface of the connecting rod 8 and provide reliable clamping force. The fixing rod 12 is L-shaped. This shape design allows the fixing rod 12 to better connect the threaded sleeve 15 and the positioning clamp 11, while saving space. There are two sets of fixing rods 12, positioning clamps 11 and rubber pads 18. The two sets of fixing rods 12, positioning clamps 11 and rubber pads 18 are symmetrically arranged on both sides of the fixture 3. This symmetrical arrangement can ensure that the connecting rod 8 is subjected to uniform clamping force on both sides and ensure the stability of the pressing process.

[0023] Working principle: Place the equipment on a stable workbench, ensuring the mounting plate 1 is level and securely fixed. Insert the bushings into the placement holes of the conical seats 5 on both sides of the mounting plate 1, ensuring the end face of the bushing is in close contact with the end face of the moving ring 20. The bushings should be placed flat, avoiding tilting or looseness, to ensure smooth subsequent pressing. Place the connecting rod 8 to be processed into the component limiting groove 10 on the top of the placement seat 7, ensuring both ends of the connecting rod 8 are aligned with the placement holes. At this time, the connecting rod 8 should be located in the center of the component limiting groove 10 for subsequent positioning assembly. The parts can be accurately clamped. By rotating the knob 17, the threaded rod 4 is rotated, which in turn drives the threaded sleeve 15 to move up and down. The movement of the threaded sleeve 15 is transmitted to the positioning fixture 11 through the fixed rod 12, so that it moves closer to the connecting rod 8 along the slide groove 16. When the rubber pad 18 at the bottom of the positioning fixture 11 contacts the outer surface of the connecting rod 8, the knob 17 is rotated again so that the rubber pad 18 applies an appropriate clamping force to the connecting rod 8, ensuring that the connecting rod 8 will not be displaced during the pressing process. The positioning fixtures 11 on both sides should be operated at the same time to ensure that the connecting rod 8 is subjected to uniform force.

[0024] After positioning, pull the operating handle 2 to send an electrical signal, controlling the extension end of cylinder 6 to extend. The extension end of cylinder 6 drives piston 9 to move laterally within the placement hole. Under the restriction of the limiting ring 19, the moving ring 20 ensures the accurate movement range of piston 9. When piston 9 moves to the point where the end face of moving ring 20 contacts the end face of limiting ring 19, the bushing is pressed into both ends of connecting rod 8, completing the pressing action. After pressing, release the positioning clamp 11, remove connecting rod 8, and check whether the bushing is fully pressed in and in the correct position. If the bushing is found to be not pressed in properly or the connecting rod 8 is damaged, check the air pressure of the equipment, the clamping force of the positioning component, and whether the bushing and connecting rod 8 are correctly placed, and make adjustments according to the actual situation. Follow the above steps to perform bushing pressing operations on other connecting rods 8 in sequence to ensure that the bushing of each connecting rod 8 can be accurately pressed in. During the entire use process, the operating status of the equipment should be checked regularly, and debris in the placement hole and the part limiting groove 10 should be cleaned in time to ensure the long-term stable operation of the equipment.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A pneumatic pressing mechanism for connecting rod bushings, comprising a mounting plate (1), characterized in that: A fixture (3) is fixedly connected to the inner side of the mounting plate (1), and an operating handle (2) is fixedly connected to the top of the fixture (3). The mounting plate (1) is provided with a pressing assembly, which includes cylinders (6). There are two sets of cylinders (6). The cylinders (6) are fixedly connected to both sides of the mounting plate (1). The telescopic ends of the cylinders (6) extend through both sides of the mounting plate (1) and are fixedly connected to pistons (9). The inner walls of both sides of the mounting plate (1) are fixedly connected to conical seats (5). The end face of the conical seat (5) is provided with a placement hole. The piston (9) is located on the inner wall of the placement hole. The front of the fixture (3) is connected to a placement seat (7) by bolt thread. A connecting rod (8) is placed on the top of the placement seat (7). A component limiting groove (10) is opened on the top of the placement seat (7). The connecting rod (8) is placed on the inner wall of the component limiting groove (10). A positioning component is provided on the fixture (3). The operating handle (2) is electrically connected to the cylinder (6). A moving ring (20) is fixedly connected to the outer surface of the piston (9). A limiting ring (19) is fixedly connected to the inner wall of the placement seat (7). The outer surface of the moving ring (20) contacts the inner wall of the placement hole. The moving ring (20) and the limiting ring (19) are configured to cooperate.

2. The pneumatic pressing mechanism for connecting rod bushings according to claim 1, characterized in that: The positioning assembly includes an extension plate (14), the back of which is fixedly connected to the front of the fixture (3). The top of the extension plate (14) is rotatably connected to a threaded rod (4) via a bearing. A threaded sleeve (15) is threadedly connected to the surface of the threaded rod (4). A fixing rod (12) is fixedly connected to the outside of the threaded sleeve (15). A positioning clamp (11) is fixedly connected to the bottom end of the fixing rod (12).

3. The pneumatic pressing mechanism for connecting rod bushings according to claim 2, characterized in that: The back of the clamp is fixedly connected to a slider (13), and the front of the placement seat (7) is provided with a groove (16). The outer wall of the slider (13) is slidably connected to the inner wall of the groove (16).

4. The pneumatic pressing mechanism for connecting rod bushings according to claim 2, characterized in that: A knob (17) is fixedly connected to the top of the threaded rod (4).

5. The pneumatic pressing mechanism for connecting rod bushings according to claim 2, characterized in that: The placement seat (7) is "h" shaped, and the bottom of the component limiting groove (10) and the positioning clamp (11) are both semi-circular.

6. The pneumatic pressing mechanism for connecting rod bushings according to claim 2, characterized in that: A rubber pad (18) is fixedly connected to the bottom semi-circular part of the positioning clamp (11). The rubber pad (18) is arc-shaped, and the bottom of the rubber pad (18) is in contact with the outer surface of the connecting rod (8).

7. The pneumatic pressing mechanism for connecting rod bushings according to claim 1, characterized in that: The electrical signal of the operating handle (2) is compatible with the electrical signal of the cylinder (6), and the signal receiving circuit of the operating handle (2) and the cylinder (6) is connected.

8. The pneumatic pressing mechanism for connecting rod bushings according to claim 2, characterized in that: The fixing rod (12) is L-shaped. There are two sets of fixing rods (12), positioning clamps (11), and rubber pads (18). The two sets of fixing rods (12), positioning clamps (11), and rubber pads (18) are symmetrically arranged on both sides of the fixture (3).

Images