Graded ejection device of lower ejector of press machine

Abstract

The utility model belongs to the field of press machine lower ejectors, and particularly relates to a press machine lower ejector grading ejection device which comprises a bottom plate, an oil cylinder barrel is fixedly connected to the top of the bottom plate, a large piston is movably connected to the interior of the oil cylinder barrel, a large oil cylinder cover is fixedly connected to the top of the oil cylinder barrel, and the large piston is movably connected to the interior of the large oil cylinder cover. The output end of the large piston extends to the top of the large oil cylinder cover, and the large piston is movably connected into the large oil cylinder cover. Oil is fed through the lower opening, so that the large piston is ejected upwards, the ejection rod drives the ejection plate of the large oil cylinder to be ejected upwards, at the moment, the ejection plate of the large oil cylinder ejects a workpiece expansion section or a mold locking section which needs to be ejected powerfully, and then the small piston is ejected out to move upwards along with continuous oil injection. At the moment, the small piston can drive the small oil cylinder top plate to eject upwards, then the small piston continues to eject the workpiece needing to be ejected in a long stroke, or the workpiece is ejected after mold opening, and therefore secondary ejection can be completed.

Description

Technical Field

[0001] The utility model relates to the field of a lower ejector of a press, in particular to a graded ejection device of a lower ejector of a press. Background Art

[0002] A press (including punching machines and hydraulic presses) is a versatile press with an ingenious structure. It has a wide range of uses and high production efficiency. It can be widely used in cutting, punching, blanking, bending, riveting and forming processes. It processes metal blanks into parts by applying strong pressure to them to cause plastic deformation and fracture. The press is generally equipped with an ejector to eject the parts from the fixed position of the press.

[0003] Most of the existing press ejectors often simply eject parts from the fixed position of the press, and the staff still need to take them out later, which reduces the practicality. In addition, the workpiece may still be inconvenient to take out after ejection, which is inconvenient for the staff to use. Therefore, in order to solve the above problems, a graded ejection device for the lower ejector of the press is proposed. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art and solve the problem that most of the existing press ejectors simply eject parts from the fixed position of the press in a short time, and the staff still need to take them out later, resulting in reduced practicality, and the workpiece may still be inconvenient to take out after ejection, which is inconvenient for the staff to use, the utility model proposes a graded ejector device for the lower ejector of the press.

[0005] The technical solution adopted by the utility model to solve the technical problem is as follows: a graded ejecting device of a lower ejector of a press machine described in the utility model comprises a bottom plate, the top of the bottom plate is fixedly connected with an oil cylinder barrel, the inside of the oil cylinder barrel is movably connected with a large piston, the top of the oil cylinder barrel is fixedly connected with a large oil cylinder cover, the output end of the large piston extends to the top of the large oil cylinder cover, and the large piston is movably connected to the inside of the large oil cylinder cover, the top of the large oil cylinder cover is fixedly connected with a large oil connecting plate, the top of the large oil connecting plate is connected with a push rod, the top of the push rod is fixedly connected with the large oil cylinder top plate, a small piston is arranged inside the large piston, the top of the large piston is fixedly connected with the small oil cylinder cover, the small piston extends to the top of the small oil cylinder cover, the top of the small piston is fixedly connected with a column, the top of the column is fixedly connected with the small oil cylinder top plate, the top of the large oil connecting plate is fixedly connected with a stabilizing component, and the stabilizing component is sleeved on the outside of the small piston.

[0006] Preferably, a large oil cylinder sealing seat is fixedly connected to the interior of the large oil cylinder cover, and the large oil cylinder sealing seat is sleeved on the exterior of the large piston.

[0007] Preferably, the interior of the small oil cylinder cover is fixedly connected with a small oil cylinder sealing seat, and the small oil cylinder sealing seat is sleeved on the exterior of the small piston.

[0008] Preferably, an ejector fixing beam is provided on one side of the column, a guide sleeve is fixedly connected to one side of the ejector fixing beam, the guide sleeve is sleeved on the outside of the column, a guide cylinder is fixedly connected to the top of the guide sleeve, the guide cylinder is sleeved on the outside of the column, an upper guide ring is fixedly connected to the top of the guide cylinder, and a lower guide ring is fixedly connected to the top of the guide sleeve.

[0009] Preferably, a pull rod is fixedly connected between the base plate and the guide cylinder, nuts are provided at both ends of the pull rod, and the pull rod is respectively fixed to the base plate and the guide cylinder through the nuts.

[0010] Preferably, the stabilizing assembly comprises a fixing ring, an inner cleaning brush, a magnetic ring and a detachable buckle, the inner cleaning brush is fixedly connected to one side of the magnetic ring, the magnetic ring is magnetically connected to the inner side of the fixing ring, and two symmetrically distributed detachable buckles are arranged inside the fixing ring.

[0011] The utility model is beneficial in that:

[0012] 1. The utility model feeds oil through the lower port, so that the large piston will be pushed upward, and then the top plate of the large oil cylinder will be driven to be pushed upward through the ejector rod. At this time, the top plate of the large oil cylinder pushes out the expansion section of the workpiece that needs to be ejected with great force, or the locking section of the mold, and then with the continuous oil injection, the small piston will also be pushed out and move upward, and then the small piston will drive the top plate of the small oil cylinder to be pushed upward, and then the small piston will continue to eject the workpiece that needs to be ejected with a long stroke, or the workpiece after the mold is opened, so that the secondary ejection can be completed;

[0013] 2. In the utility model, when the small piston moves, the internal cleaning brush will clean the outside of the small piston to prevent the dust accumulated during its operation from affecting the smoothness of its operation. The setting of the magnetic ring is convenient for removing the internal cleaning brush from the fixed ring, and the setting of the two detachable buckles makes it convenient to remove the detachable buckle from the top of the large oil connecting plate, and convenient for the fixed ring to be disassembled into two by itself, which is more convenient for replacing the internal cleaning brush. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is an enlarged schematic diagram of the structure of the utility model A;

[0017] Figure 3 It is an enlarged schematic diagram of the structure at B of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the stabilizing component of the utility model.

[0019] In the figure: 1. small oil cylinder top plate; 3. large oil cylinder top plate; 5. ejector rod; 6. column; 8. upper guide ring; 9. guide cylinder; 10. lower guide ring; 12. nut; 13. ejector fixing beam; 14. guide sleeve; 15. pull rod; 17. large oil connecting plate; 19. small oil cylinder cover; 21. large oil cylinder cover; 22. large piston; 23. oil cylinder barrel; 24. bottom plate; 26. small oil cylinder sealing seat; 27. large oil cylinder sealing seat; 28. small piston; 29. ​​stabilizing assembly; 2901. fixing ring; 2902. internal cleaning brush; 2903. magnetic ring; 2904. removable buckle. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 4 As shown, a step-by-step ejection device for a lower ejector of a press comprises a bottom plate 24, a cylinder barrel 23 is fixedly connected to the top of the bottom plate 24, a large piston 22 is movably connected inside the cylinder barrel 23, a large cylinder cover 21 is fixedly connected to the top of the cylinder barrel 23, an output end of the large piston 22 extends to the top of the large cylinder cover 21, and the large piston 22 is movably connected to the inside of the large cylinder cover 21, a large oil connecting plate 17 is fixedly connected to the top of the large cylinder cover 21, and a large oil connecting plate 17 is fixedly connected to the top of the large cylinder cover 21. A push rod 5 is connected to the top, and a large oil cylinder top plate 3 is fixedly connected to the top of the push rod 5. A small piston 28 is arranged inside the large piston 22. A small oil cylinder cover 19 is fixedly connected to the top of the large piston 22. The small piston 28 extends to the top of the small oil cylinder cover 19. A column 6 is fixedly connected to the top of the column 6. The small oil cylinder top plate 1 is fixedly connected to the top of the column 6. A stabilizing component 29 is fixedly connected to the top of the large oil connecting plate 17. The stabilizing component 29 is sleeved on the outside of the small piston 28.

[0022] During operation, when the device is used, oil is introduced into the lower port, so that the large piston 22 will be pushed upward, and then the large oil cylinder top plate 3 will be driven to be pushed upward through the push rod 5. At this time, the large oil cylinder top plate 3 pushes out the workpiece expansion section or the mold locking section that needs to be ejected with great force, and then with the continuous oil injection, the small piston 28 will also be pushed out and move upward, then the small piston 28 will drive the small oil cylinder top plate 1 to be pushed upward, and then the small piston 28 will continue to eject the workpiece that needs to be ejected with a long stroke, or the workpiece after the mold is opened, so that the secondary ejection can be completed.

[0023] Furthermore, a large oil cylinder sealing seat 27 is fixedly connected to the inside of the large oil cylinder cover 21, and the large oil cylinder sealing seat 27 is sleeved on the outside of the large piston 22;

[0024] During operation, the sealing performance of the large oil cylinder cover 21 is ensured by the large oil cylinder sealing seat 27 , but the operation of the large piston 22 is not affected.

[0025] Furthermore, the interior of the small oil cylinder cover 19 is fixedly connected with a small oil cylinder sealing seat 26, and the small oil cylinder sealing seat 26 is sleeved on the outside of the small piston 28;

[0026] During operation, the sealing performance of the small oil cylinder cover 19 is ensured by the small oil cylinder sealing seat 26 provided, but the operation of the small piston 28 is not affected.

[0027] Further, an ejector fixing beam 13 is provided on one side of the column 6, a guide sleeve 14 is fixedly connected to one side of the ejector fixing beam 13, the guide sleeve 14 is sleeved on the outside of the column 6, a guide cylinder 9 is fixedly connected to the top of the guide sleeve 14, the guide cylinder 9 is sleeved on the outside of the column 6, an upper guide ring 8 is fixedly connected to the top of the guide cylinder 9, and a lower guide ring 10 is fixedly connected to the top of the guide sleeve 14;

[0028] During operation, through a variety of guide components, the large piston 22 and the small piston 28 have stable directions when they are doing reciprocating motion, so that the device can be operated more safely and with high stability, and the service life will be relatively increased.

[0029] Furthermore, a pull rod 15 is fixedly connected between the bottom plate 24 and the guide cylinder 9, and nuts 12 are provided at both ends of the pull rod 15, and the pull rod 15 is fixed to the bottom plate 24 and the guide cylinder 9 respectively through the nuts 12;

[0030] During operation, the guide cylinder 9 is connected to the bottom plate 24 through the provided pull rod 15, which makes the device more stable.

[0031] Furthermore, the stabilizing assembly 29 includes a fixing ring 2901, an inner cleaning brush 2902, a magnetic ring 2903 and a detachable buckle 2904, wherein the inner cleaning brush 2902 is fixedly connected to one side of the magnetic ring 2903, the magnetic ring 2903 is magnetically connected to the inner side of the fixing ring 2901, and two symmetrically distributed detachable buckles 2904 are arranged inside the fixing ring 2901;

[0032] During operation, when the small piston 28 moves, the internal cleaning brush 2902 will clean the outside of the small piston 28 to prevent the dust accumulated during its operation from affecting the smoothness of its operation. The setting of the magnetic ring 2903 is to facilitate the removal of the internal cleaning brush 2902 from the fixed ring 2901, and the setting of the two detachable buckles 2904 makes it convenient to remove the detachable buckles 2904 from the top of the large oil connecting plate 17, and to facilitate the disassembly of the fixed ring 2901 into two by itself, which is more convenient for the replacement of the internal cleaning brush 2902.

[0033] Working principle: When the device is used, oil is fed into the lower port, so that the large piston 22 will be pushed upward, and then the large oil cylinder top plate 3 will be driven to be pushed upward through the push rod 5. At this time, the large oil cylinder top plate 3 pushes out the expansion section of the workpiece that needs to be ejected with great force, or the mold locking section, and then with the continuous oil injection, the small piston 28 will also be pushed out and move upward, then the small piston 28 will drive the small oil cylinder top plate 1 to be pushed upward, and then the small piston 28 will continue to push out the workpiece that needs to be ejected with a long stroke, or the workpiece after the mold is opened. In this way, the secondary ejection can be completed, and the large piston 22 and the small piston 28 can be pushed out. When the plug 28 is retracted, oil is fed into the middle and upper ports. At the same time, when the small piston 28 moves, the internal cleaning brush 2902 will clean the outside of the small piston 28 to prevent dust accumulated during its operation from affecting the smoothness of its operation. The setting of the magnetic ring 2903 is convenient for removing the internal cleaning brush 2902 from the fixed ring 2901, and the setting of the two detachable buckles 2904 makes it convenient to remove the detachable buckle 2904 from the top of the large oil connecting plate 17, and to disassemble the fixed ring 2901 into two by itself, which is more convenient for replacing the internal cleaning brush 2902.

[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A step-by-step ejection device for a lower ejector of a press machine, comprising a bottom plate (24), the top of which is fixedly connected to a cylinder barrel (23), characterized in that: The inside of the oil cylinder barrel (23) is movably connected to a large piston (22), the top of the oil cylinder barrel (23) is fixedly connected to a large oil cylinder cover (21), the output end of the large piston (22) extends to the top of the large oil cylinder cover (21), and the large piston (22) is movably connected to the inside of the large oil cylinder cover (21), the top of the large oil cylinder cover (21) is fixedly connected to a large oil connecting plate (17), the top of the large oil connecting plate (17) is connected to a push rod (5), and the top of the push rod (5) is fixedly connected to the large oil cylinder top The large piston (22) is provided with a small piston (28) inside, the top of the large piston (22) is fixedly connected to a small oil cylinder cover (19), the small piston (28) extends to the top of the small oil cylinder cover (19), the top of the small piston (28) is fixedly connected to a column (6), the top of the column (6) is fixedly connected to a small oil cylinder top plate (1), the top of the large oil connecting plate (17) is fixedly connected to a stabilizing component (29), and the stabilizing component (29) is sleeved on the outside of the small piston (28).

2. A step-by-step ejection device for a lower ejector of a press according to claim 1, characterized in that: A large oil cylinder sealing seat (27) is fixedly connected to the interior of the large oil cylinder cover (21), and the large oil cylinder sealing seat (27) is sleeved on the exterior of the large piston (22).

3. A step-by-step ejection device for a lower ejector of a press according to claim 2, characterized in that: The interior of the small oil cylinder cover (19) is fixedly connected to a small oil cylinder sealing seat (26), and the small oil cylinder sealing seat (26) is sleeved on the outside of the small piston (28).

4. A step-by-step ejection device for a lower ejector of a press according to claim 1, characterized in that: An ejector fixing beam (13) is provided on one side of the column (6), a guide sleeve (14) is fixedly connected to one side of the ejector fixing beam (13), the guide sleeve (14) is sleeved on the outside of the column (6), the top of the guide sleeve (14) is fixedly connected to a guide cylinder (9), the guide cylinder (9) is sleeved on the outside of the column (6), the top of the guide cylinder (9) is fixedly connected to an upper guide ring (8), and the top of the guide sleeve (14) is fixedly connected to a lower guide ring (10).

5. The step-by-step ejection device of the lower ejector of a press according to claim 1, characterized in that: A pull rod (15) is fixedly connected between the base plate (24) and the guide cylinder (9), nuts (12) are provided at both ends of the pull rod (15), and the pull rod (15) is respectively fixed to the base plate (24) and the guide cylinder (9) through the nuts (12).

6. The step-by-step ejection device of the lower ejector of a press according to claim 1, characterized in that: The stabilizing component (29) comprises a fixing ring (2901), an inner cleaning brush (2902), a magnetic ring (2903) and a detachable buckle (2904), wherein the inner cleaning brush (2902) is fixedly connected to one side of the magnetic ring (2903), the magnetic ring (2903) is magnetically connected to the inner side of the fixing ring (2901), and two symmetrically distributed detachable buckles (2904) are arranged inside the fixing ring (2901).

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