A device for adjusting the sealing height, preventing overload, and relieving stalling in a press.

Abstract

This utility model relates to a device for adjusting sealing height, preventing overload, and relieving stalling in a press. It includes a connecting rod and a slider. Two connecting plates are spaced apart at the lower end of the connecting rod. An eccentric shaft is rotatably mounted on the slider. The eccentric shaft includes a shaft and an eccentric portion. The connecting plates are rotatably mounted on the eccentric portion. A rocker arm is fixedly mounted on the eccentric portion. A nut is rotatably mounted on the upper end of the rocker arm. A lead screw is mounted on the nut. One end of the lead screw is connected to a hydraulic motor via a spline and coupling. The other end has a ball joint. The hydraulic motor is connected to an encoder. A ball joint seat is mounted on the slider. A guide cavity and a piston cavity are spaced apart within the ball joint seat. A piston and a ball joint connecting piston rod are located within the piston cavity. The end of the ball joint connecting piston rod is located within the guide cavity. An inner end cap is located at the front end of the ball joint connecting piston rod. The ball joint is positioned between the ball joint connecting piston rod and the inner end cap. Oil inlets A and B are located at both ends of the piston cavity. This device has advantages such as reasonable structural design, adjustable sealing height, overload prevention, and stall relief.

Description

Technical fields:

[0001] This utility model relates to the field of hot die forging press technology, specifically to a device for adjusting the sealing height, preventing overload, and relieving stalling in a press. Background technology:

[0002] Sealing height adjustment and anti-locking are essential functions of existing hot die forging presses. To address these issues, existing hot die forging presses employ various solutions. For example, for sealing height adjustment, current technology typically uses worm gear transmission with an eccentric worm wheel. Specific structures can be found in Chinese patents: a forging press sealing height adjustment device (application publication number: CN 112676518 A) and a hot die forging press sealing height adjustment device (authorization announcement number: CN 209886578U). For anti-locking, existing technologies offer multiple solutions, such as increasing the clutch intake pressure and using a hammering action on the die, increasing clutch torque via a motor and utilizing flywheel rotational inertia, or using a motor-driven lead screw and nut structure. Specific solutions can be found in Chinese patent: a hot die forging micro-adjustment anti-locking integrated device (application publication number: CN 112658187 A). Existing solutions do not integrate the design and solutions for adjusting the sealing height, preventing overload, and relieving stalling. In practical applications, these solutions suffer from low efficiency and low adjustment accuracy, which limits the advantages of hot die forging presses and results in insufficient product market competitiveness.

[0003] It should be noted that the above content falls within the inventor's technical knowledge and does not necessarily constitute prior art. Utility Model Content:

[0004] The purpose of this utility model is to solve the problems existing in the prior art and provide a device for adjusting the sealing height, preventing overload, and relieving stalling of a press. It adopts an integrated design concept and has the advantages of reasonable structural design, high working efficiency, and precise adjustment.

[0005] This utility model achieves the above objectives by adopting the following technical solutions:

[0006] A device for adjusting the sealing height, preventing overload, and relieving stalling in a press includes a connecting rod and a slider. The upper end of the connecting rod is mounted on a crankshaft, and the lower end is provided with two connecting plates spaced apart. An eccentric shaft is rotatably mounted on the slider. The eccentric shaft includes a shaft and an eccentric part located in the middle of the shaft. The connecting plates are rotatably mounted on the eccentric part. A rocker arm is fixedly mounted on the eccentric part between the two connecting plates. A nut is rotatably mounted on the upper end of the rocker arm. A lead screw is mounted on the nut. One end of the lead screw is connected to a coupling via a spline. The coupling is connected to a hydraulic motor. The other end is provided with a ball joint. The hydraulic motor is connected to an encoder via a chain drive. A ball joint seat is provided on the slider. A guide cavity and a piston cavity are spaced apart in the ball joint seat. A piston is located in the piston cavity. A ball joint connecting to the piston rod is provided on the piston. The end of the ball joint connecting to the piston rod is located in the guide cavity. An inner end cap is provided at the front end of the ball joint connecting to the piston rod. The ball joint is installed between the ball joint connecting to the piston rod and the inner end cap. Oil inlet A and oil inlet B are respectively provided at both ends of the piston cavity.

[0007] The shafts at both ends of the eccentric shaft are rotatably mounted on the slider via end cap bearings, and the end cap bearings are provided with sealing rings and sealing caps.

[0008] The lower end of the connecting plate is provided with a mounting hole A, and the outer wall of the connecting plate is provided with a reinforcing rib plate corresponding to the mounting hole A. A bearing is provided in the mounting hole A, and the bearing is rotatably mounted on the eccentric part of the eccentric shaft.

[0009] The lower end of the swing arm is provided with a mounting hole B, the mounting hole B is provided with a keyway, the eccentric shaft is provided with a flat key, and the flat key is fastened to the eccentric part of the eccentric shaft by screws.

[0010] The upper end of the swing arm is provided with a mounting hole C, and the nut is rotatably disposed in the mounting hole C. The two ends of the nut are respectively provided with shaft protrusions, and the corresponding two sides of the swing arm are respectively provided with limiting end caps. The nut is provided with a threaded hole along its radial direction, and a lead screw is provided on the threaded hole.

[0011] The hydraulic motor is mounted on the transmission box, the transmission box is mounted on the side wall of the slider, the encoder is mounted on the transmission box, the output shaft of the hydraulic motor is provided with a drive sprocket, the output shaft of the encoder is provided with a driven sprocket, and the drive sprocket is connected to the driven sprocket through a chain.

[0012] The ball head seat includes a housing mounted on a slider. Inside the housing, a guide cavity and a piston cavity are arranged sequentially from the inside to the outside. An outer end cap is provided at the outer end of the housing. A through hole is provided between the guide cavity and the piston cavity. The rod portion of the ball head connecting the piston rod passes through the through hole and is mounted on the piston. An oil inlet A communicating with the outer end of the piston cavity is provided on the outer end cap. An oil inlet B communicating with the inner end of the piston cavity is provided on the housing.

[0013] The present invention, by adopting the above-described structure, can bring the following beneficial effects:

[0014] By designing an eccentric shaft on the slider and modifying the structure of the connecting rod, the swing arm, nut, and lead screw can be installed. Then, a hydraulic drive is designed for one end of the lead screw, and a ball head and hydraulic control are designed for the other end. The whole system is integrated and can realize the functions of height adjustment, overload prevention, and engine stall relief. Attached image description:

[0015] Figure 1 This is a schematic diagram of the structure of the device for adjusting the sealing height, preventing overload, and relieving engine stalling of this utility model;

[0016] Figure 2 This is an exploded view of the device for adjusting the sealing height, preventing overload, and relieving engine stalling of this utility model;

[0017] Figure 3 This is an exploded view from another perspective of the device for adjusting the sealing height, preventing overload, and relieving engine stalling of this utility model;

[0018] Figure 4 This is a schematic diagram of the swing arm mounting structure of this utility model;

[0019] Figure 5 This is an exploded view of the swing arm mounting structure of this utility model;

[0020] Figure 6 An exploded view of the swing arm mounting structure of this utility model from another perspective;

[0021] Figure 7 This is a schematic diagram of the structure of the nut of this utility model;

[0022] Figure 8 This is a schematic diagram of the lead screw structure of this utility model;

[0023] Figure 9 This is a schematic diagram of the connection between the hydraulic motor and the encoder of this utility model;

[0024] Figure 10 This is a schematic diagram of the structure of the ball head seat of this utility model;

[0025] In the diagram, 1. Connecting rod, 2. Slider, 3. Crankshaft, 4. Connecting plate, 5. Eccentric shaft, 501. Shaft, 502. Eccentric part, 6. Rocker arm, 7. Nut, 8. Lead screw, 9. Spline, 10. Coupling, 11. Hydraulic motor, 12. Ball joint, 13. Encoder, 14. Ball joint seat, 1401. Housing, 1402. Guide cavity, 1403. Piston chamber, 1404. Through hole, 1405. Inner end cover, 1406. Outer end cover, 15. Piston. 16. Ball head connecting piston rod; 17. Oil inlet A; 18. Oil inlet B; 19. End cap type bearing; 20. Sealing cap; 21. Mounting hole A; 22. Reinforcing rib plate; 23. Bearing shell; 24. Mounting hole B; 25. Keyway; 26. Flat key; 27. Screw; 28. Mounting hole C; 29. ​​Shaft protrusion; 30. Limiting end cap; 31. Threaded hole; 32. Transmission box; 33. Drive sprocket; 34. Driven sprocket; 35. Chain; 36. Mounting hole. Detailed implementation method:

[0026] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0028] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] like Figure 1-10As shown, a device for adjusting the sealing height, preventing overload, and relieving stalling in a press includes a connecting rod 1 and a slider 2. The upper end of the connecting rod 1 is mounted on a crankshaft 3, and the lower end is provided with two connecting plates 4 spaced apart. The two connecting plates 4 are spaced apart to provide installation space for a swing arm 6. An eccentric shaft 5 is rotatably mounted on the slider 1. The eccentric shaft 5 includes a shaft 501 and an eccentric part 502 located in the middle of the shaft 501. The connecting plates 4 are rotatably mounted on the eccentric part 502. A swing arm 6 is fixedly mounted on the eccentric part 502 between the two connecting plates 4. A nut 7 is rotatably mounted on the upper end of the swing arm 6. A lead screw 8 is mounted on the nut 7. One end of the lead screw 8 is connected to a coupling 10 via a spline 9. The spline 9 connection not only realizes power transmission but also allows for relative sliding design. The coupling 10 is connected to a hydraulic motor 11, and the other end is provided with a ball joint 12. The hydraulic motor 11 is connected via a chain transmission. The slider 2 is connected to the encoder 13. A ball head seat 14 is provided on the slider 2. A guide cavity 1402 and a piston cavity 1403 are spaced apart within the ball head seat 14. A piston 15 is provided within the piston cavity 1403. A ball head connecting piston rod 16 is provided on the piston 15. The end of the ball head connecting piston rod 16 is located within the guide cavity 1402. An inner end cap 1405 is provided at the front end of the ball head connecting piston rod 16. A ball head 12 is located between the inner end cap 1405 and the ball head connecting piston rod 16. Oil inlets A17 and B18 are provided at both ends of the piston cavity 1403. In practical applications, oil inlets A17 and B18 are connected to the hydraulic system of the press. During normal use, pressure is maintained at oil inlet A17 to achieve overload protection. When it is necessary to release the press from stall, oil inlet A17 is unloaded, and hydraulic oil is introduced into oil inlet B18. By designing an eccentric shaft 5 on the slider 2 and modifying the structure of the connecting rod 1, the swing arm 6, nut 7 and lead screw 8 can be installed. Then, a hydraulic drive is designed for one end of the lead screw 8, and a ball head 12 and hydraulic control are designed for the other end. The whole is integrated into a design that can realize the functions of sealing height adjustment, overload prevention and relieving stalling.

[0031] The shafts 501 at both ends of the eccentric shaft 5 are rotatably mounted on the mounting holes 36 of the slider 1 via end cap bearings 19. The end cap bearings 19 are provided with sealing rings and sealing caps 20. The shafts 501 of the eccentric shaft 5 are rotatably mounted on the slider via the end cap bearings 19 and are lubricated.

[0032] The lower end of the connecting plate 4 is provided with a mounting hole A21. A reinforcing rib 22 is provided on the outer wall of the connecting plate 4 corresponding to the mounting hole A21. A bearing 23 is provided inside the mounting hole A21. The bearing 23 is rotatably mounted on the eccentric part 502 of the eccentric shaft 5. This enhances the connection strength between the connecting plate 4 and the eccentric shaft 5, reduces rotational friction and wear, and provides lubrication and cooling for power consumption.

[0033] The lower end of the swing arm 6 is provided with a mounting hole B24, and a keyway 25 is provided on the mounting hole B24. A flat key 26 is provided on the eccentric shaft 5, and the flat key 26 is fastened to the eccentric part 502 of the eccentric shaft 5 by screws 27. This achieves a reliable fixed connection between the swing arm 6 and the eccentric part 502.

[0034] The upper end of the swing arm 6 is provided with a mounting hole C28, and the nut 7 is rotatably disposed in the mounting hole C28. The two ends of the nut 7 are respectively provided with shaft protrusions 29, and the corresponding two sides of the swing arm 6 are respectively provided with limiting end caps 30. The nut 7 is provided with a threaded hole 31 along its radial direction, and a lead screw 8 is provided on the threaded hole 31. This achieves a reliable rotational connection of the nut 7.

[0035] The hydraulic motor 11 is mounted on the transmission housing 32, which is mounted on the side wall of the slider 2. The encoder 13 is mounted on the transmission housing 32. The output shaft of the hydraulic motor 11 is equipped with a drive sprocket 33, and the output shaft of the encoder 13 is equipped with a driven sprocket 34. The drive sprocket 33 is connected to the driven sprocket 34 via a chain 35. The encoder can monitor the rotational movement of the hydraulic motor in real time, thereby enabling precise adjustment of the sealing height.

[0036] The ball joint seat 14 includes a housing 1401 mounted on the slider 2. Inside the housing 1401, a guide cavity 1402 and a piston cavity 1403 are sequentially arranged from the inside out. An outer end cap 1406 is provided at the outer end of the housing 1401. A through hole 1404 is provided between the guide cavity 1402 and the piston cavity 1403. The rod portion of the ball joint connecting piston rod 16 passes through the through hole 1404 and is mounted on the piston 15. The outer end cap 1406 has an oil inlet A17 communicating with the outer end of the piston cavity 1403, and the housing 1401 has an oil inlet B18 communicating with the inner end of the piston cavity 1403. This design combines hydraulic cylinder technology with ball joint connection technology, enabling hydraulic control to maintain pressure and prevent overload on the ball joint, as well as to relieve stalling.

[0037] The specific usage process of this invention is as follows:

[0038] (1) When the mold sealing height needs to be adjusted, the hydraulic motor 11 is started. The hydraulic motor 11 drives the lead screw 8 to rotate through the coupling 10 and spline 9. The rotation of the lead screw 8 drives the nut 7 to move. The movement of the nut 7 drives the swing arm 6 to swing (adjust the angle). The swing arm 6 drives the eccentric shaft 5 to rotate, causing the bottom dead center of the slider 1 to change, thus achieving the purpose of adjusting the mold sealing height. The hydraulic motor 11 transmits the number of rotations to the encoder 12 through chain drive, which can calculate the adjustment height by means of the thread lead, etc. The hydraulic motor 11 has a self-locking function and locks itself after adjustment.

[0039] (2) Overload protection: After the sealing height adjustment part is self-locked, the oil inlet A17 is designed to maintain pressure and lock. If overload occurs during operation and exceeds the design calculation value of the press, this position will be pushed open to relieve the load, making the press unable to work, thus achieving overload protection.

[0040] (3) To relieve the jamming, when the press mold is stuck, the oil inlet A17 is depressurized, and at the same time, hydraulic oil is introduced into the oil inlet B18. The pressure will loosen the mold, thus relieving the jamming.

[0041] The above specific embodiments should not be construed as limiting the scope of protection of this utility model. For those skilled in the art, any alternative improvements or modifications made to the embodiments of this utility model shall fall within the scope of protection of this utility model.

[0042] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A device for adjusting the sealing height, preventing overload, and relieving stalling in a press, comprising a connecting rod and a slider, characterized in that, The upper end of the connecting rod is mounted on the crankshaft, and the lower end is spaced apart by two connecting plates. An eccentric shaft is rotatably mounted on the slider. The eccentric shaft includes a shaft and an eccentric part located in the middle of the shaft. The connecting plates are rotatably mounted on the eccentric part. A rocker arm is fixedly mounted on the eccentric part between the two connecting plates. A nut is rotatably mounted on the upper end of the rocker arm. A lead screw is mounted on the nut. One end of the lead screw is connected to a coupling via a spline. The coupling is connected to a hydraulic motor. The other end is equipped with a ball joint. The hydraulic motor is connected to an encoder via a chain drive. A ball joint seat is mounted on the slider. A guide cavity and a piston cavity are spaced apart in the ball joint seat. A piston is mounted in the piston cavity. A ball joint is connected to the piston rod on the piston. The end of the ball joint connected to the piston rod is located in the guide cavity. An inner end cap is provided at the front end of the ball joint connected to the piston rod. The ball joint is installed between the ball joint connected to the piston rod and the inner end cap. Oil inlet A and oil inlet B are respectively provided at both ends of the piston cavity.

2. The device for adjusting sealing height, preventing overload, and relieving stalling of a press according to claim 1, characterized in that, The shafts at both ends of the eccentric shaft are rotatably mounted on the slider via end cap bearings, and the end cap bearings are provided with sealing rings and sealing caps.

3. The device for adjusting sealing height, preventing overload, and relieving stalling of a press according to claim 2, characterized in that, The lower end of the connecting plate is provided with a mounting hole A, and the outer wall of the connecting plate is provided with a reinforcing rib plate corresponding to the mounting hole A. A bearing is provided in the mounting hole A, and the bearing is rotatably mounted on the eccentric part of the eccentric shaft.

4. The device for adjusting sealing height, preventing overload, and relieving stalling of a press according to claim 3, characterized in that, The lower end of the swing arm is provided with a mounting hole B, the mounting hole B is provided with a keyway, the eccentric shaft is provided with a flat key, and the flat key is fastened to the eccentric part of the eccentric shaft by screws.

5. The device for adjusting sealing height, preventing overload, and relieving stalling of a press according to claim 4, characterized in that, The upper end of the swing arm is provided with a mounting hole C, and the nut is rotatably disposed in the mounting hole C. The two ends of the nut are respectively provided with shaft protrusions, and the corresponding two sides of the swing arm are respectively provided with limiting end caps. The nut is provided with a threaded hole along its radial direction, and a lead screw is provided on the threaded hole.

6. The device for adjusting sealing height, preventing overload, and relieving stalling of a press according to claim 5, characterized in that, The hydraulic motor is mounted on the transmission box, the transmission box is mounted on the side wall of the slider, the encoder is mounted on the transmission box, the output shaft of the hydraulic motor is provided with a drive sprocket, the output shaft of the encoder is provided with a driven sprocket, and the drive sprocket is connected to the driven sprocket through a chain.

7. The device for adjusting sealing height, preventing overload, and relieving stalling of a press according to claim 6, characterized in that, The ball head seat includes a housing mounted on a slider. Inside the housing, a guide cavity and a piston cavity are arranged sequentially from the inside to the outside. An outer end cap is provided at the outer end of the housing. A through hole is provided between the guide cavity and the piston cavity. The rod portion of the ball head connecting the piston rod passes through the through hole and is mounted on the piston. An oil inlet A communicating with the outer end of the piston cavity is provided on the outer end cap. An oil inlet B communicating with the inner end of the piston cavity is provided on the housing.

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