Lubricating structure for piston rod of balance cylinder of press machine

Abstract

The utility model relates to the field of balance cylinders, and discloses a press machine balance cylinder piston rod lubricating structure which comprises a piston rod, the piston rod is inserted into a cylinder body in a sliding mode, an oil return through hole is formed in the piston rod, a piston body is arranged between the piston rod and the cylinder body, and a top cover is arranged at the top end of the cylinder body. An oil injection hole is formed in the top face of the top cover, a copper sleeve is arranged between the cover body and the piston rod, a flange is arranged between the copper sleeve and the cover body, and an oil outlet hole is formed in the left side of the cover body. According to the utility model, through the oil injection hole, the cover body, the flange, the oil inlet hole and the oil outlet hole, the friction force between the piston rod and the copper sleeve can be reduced under the action of lubricating oil when the piston rod and the copper sleeve are in high-speed friction, and the lubricating oil can take away part of heat on the copper sleeve to play a cooling role and can reduce the mutual abrasion between parts; and the working condition of a high-speed punching machine can be met, and the oiling frequency for lubricating the piston rod and the copper sleeve can be reduced under the condition that the stroke frequency per minute is small.

Description

Technical Field

[0001] The utility model relates to the technical field of balancing cylinders, in particular to a lubricating structure for a piston rod of a balancing cylinder of a press. Background Art

[0002] The balancing cylinder is primarily used as a balancing component in high-speed punch presses. In press applications, the slider reciprocates between top and bottom dead centers. The balancing cylinder's primary function is to balance the slider's weight, ensuring smooth transmission during the slider's upward return stroke and reducing flywheel energy loss. It also prevents harmful collisions between the connecting rod bearing and the crankshaft during press operation. The balancing cylinder provides a constant upward force on the slider, preventing it from freely falling due to its own weight if the connecting rod breaks.

[0003] The structure between the piston rod and the copper sleeve of the balancing cylinder currently on the market is simple. Generally, they are not lubricated or use self-lubricating copper sleeves (that is, holes are punched in the copper sleeves and graphite is embedded in the holes). Therefore, there are the following disadvantages: the piston rod and the copper sleeve are prone to wear under high-speed operation, the copper sleeve becomes hot, etc., and lubricating oil needs to be applied frequently to ensure the normal use of the balancing cylinder. Utility Model Content

[0004] The purpose of the utility model is to provide a lubricating structure for the piston rod of a balancing cylinder of a press machine, so as to solve the problems that the piston rod and the copper sleeve are easily worn and the copper sleeve becomes hot under high-speed operation, and lubricating oil needs to be applied frequently to ensure the normal use of the balancing cylinder.

[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions: a lubricating structure of a balancing cylinder piston rod of a press machine, comprising a piston rod, the piston rod being slidably inserted into the cylinder body, the piston rod being provided with an oil return hole, a piston body being provided between the piston rod and the cylinder body, the top end of the cylinder body being provided with a top cover, the top surface of the top cover being provided with an oil filling hole, a nut being provided between the piston rod and the top cover, a notch being provided at the lower end of the nut, a cover body being fixed to the bottom surface of the cylinder body, a total air inlet being provided on the cover body, a copper sleeve being provided between the cover body and the piston rod, a notch being provided on the copper sleeve, a flange being provided between the copper sleeve and the cover body, an oil inlet hole being provided on the right side of the cover body, an oil outlet hole being provided on the left side of the cover body, a fixing seat being provided at the bottom end of the piston rod, and an oil return box being fixed between the fixing seat and the piston rod.

[0006] Preferably, a first Y-shaped ring is provided between the piston body and the cylinder body, a second Y-shaped ring is provided between the cover body and the copper sleeve, and a third Y-shaped ring is provided between the piston rod and the flange.

[0007] Preferably, a first O-ring is provided between the cylinder body and the cover body, and a second O-ring is provided between the cover body and the flange.

[0008] Preferably, a guide ring is provided between the inner wall of the cylinder and the piston body.

[0009] Preferably, saddle screw holes are respectively provided on the left and right sides of the outer wall of the copper sleeve.

[0010] Preferably, a spherical washer is fixed between the piston rod and the fixing seat.

[0011] Compared with the prior art, the lubrication structure of the piston rod of the balance cylinder of a press machine using the above technical solution has the following beneficial effects:

[0012] 1. During use, the oil filling hole, cover, flange, oil inlet hole and oil outlet hole can reduce the friction between the piston rod and the copper sleeve when they rub at high speed through the effect of lubricating oil. The lubricating oil can also take away some of the heat on the copper sleeve to play a cooling role. At the same time, the lubricating oil can reduce the mutual wear between parts and meet the working conditions of high-speed punching machines. When the number of strokes per minute is small, the number of times the piston rod and copper sleeve are lubricated can be reduced.

[0013] 2. During use, the first Y-ring is set between the piston body and the cylinder body, which effectively prevents the leakage of high-pressure gas or liquid, ensuring the stability of the working pressure of the balance cylinder; the second Y-ring is installed between the cover body and the copper sleeve, playing a similar sealing role, preventing the lubricating oil from leaking from the gap between the copper sleeve and the cover body; the third Y-ring is set between the piston rod and the flange, further enhancing the sealing of the connection between the piston rod and the flange, improving the sealing performance of the balance cylinder, ensuring the stability of the working pressure and the effective use of the lubricating oil. The first O-ring is set between the cylinder body and the cover body, which plays a sealing and anti-loosening role, ensuring a tight connection between the cylinder body and the cover body; the second O-ring is installed between the cover body and the flange, which also plays a sealing and fixing role, enhancing the connection strength between the cylinder body and the cover body, and between the cover body and the flange, preventing leakage problems caused by looseness, while improving the overall sealing performance of the equipment, ensuring the normal operation and safety of the equipment;

[0014] 3. During use, the guide ring helps guide and support the movement of the piston body, ensuring the smooth movement of the piston body in the cylinder, improving the movement accuracy and stability of the piston body, and reducing friction and wear caused by unstable movement. The saddle screw holes make it easy for staff to use bolts to fix the copper sleeve to the cover body, preventing the copper sleeve from rotating and loosening during high-speed movement, improving the connection strength and stability between the copper sleeve and the cover body, and ensuring good lubrication and sealing between the piston rod and the copper sleeve. The spherical washer helps to effectively absorb the offset and impact force caused by movement, providing better adaptability and shock absorption effects, not only improving the connection stability between the piston rod and the fixed seat, but also reducing the noise and vibration of the equipment during operation, improving overall comfort and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front cross-sectional schematic diagram of an embodiment.

[0016] Figure 2 It is a side cross-sectional schematic diagram of an embodiment.

[0017] Figure 3 Schematic top view of the cover body in the embodiment.

[0018] Figure 4 Schematic top view of the copper sleeve in the embodiment.

[0019] In the figure: 1. Piston rod; 2. Cylinder body; 3. Oil return hole; 4. Piston body; 5. Top cover; 6. Oil filling hole; 7. Nut; 8. Cover body; 9. Copper sleeve; 10. Flange; 11. Oil inlet hole; 12. Oil outlet hole; 13. Fixed seat; 14. Oil return box; 15. First Y-ring; 16. Second Y-ring; 17. Third Y-ring; 18. First O-ring; 19. Second O-ring; 20. Guide ring; 21. Saddle screw hole; 22. Spherical washer. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] like Figures 1-4As shown, a lubrication structure for the piston rod of a balancing cylinder of a press machine comprises a piston rod 1, which is slidably inserted in a cylinder body 2, and an oil return through hole 3 is provided on the piston rod 1. A piston body 4 is provided between the piston rod 1 and the cylinder body 2, and a top cover 5 is provided at the top of the cylinder body 2. An oil filling hole 6 is provided on the top surface of the top cover 5, and a nut 7 is provided between the piston rod 1 and the top cover 5. A slot is provided at the lower end of the nut 7, and a cover body 8 is fixed to the bottom surface of the cylinder body 2, and a total air inlet is provided on the cover body 8, a copper sleeve 9 is provided between the cover body 8 and the piston rod 1, and a slot is provided on the copper sleeve 9, and a flange 10 is provided between the copper sleeve 9 and the cover body 8, an oil inlet hole 11 is provided on the right side of the cover body 8, and an oil outlet hole 12 is provided on the left side of the cover body 8, a fixing seat 13 is provided at the bottom end of the piston rod 1, and an oil return box 14 is fixed between the fixing seat 13 and the piston rod 1.

[0022] During use, there is a total air inlet on the cover body 8 of the balancing cylinder, so that a high-pressure chamber is formed between the cylinder body 2, the piston body 4, the cover body 8, and the piston rod 1. The cylinder body 2 is fixed to the machine body, and the fixing seat 13 is connected to the slider. Under the action of high pressure, the piston body 4 has an upward force, so that the slider is subjected to an upward force. When the machine tool is running, the slider reciprocates up and down, and the piston body 4 and the piston rod 1 reciprocate up and down under the driving action of the slider. The piston body 4 and the inner wall of the cylinder body 2, the piston rod 1 and the copper sleeve 9 will produce relative sliding friction. The processing requirements of the surface with sliding friction should also be improved accordingly, and lubrication points should be set to reduce friction and prevent the friction surface from overheating. In this structure, the top cover 5 is provided with a lubrication point, and the oil filling hole 6 of the top cover 5 continuously drips oil into the cylinder body 2. When the oil gathers, it returns to the oil return box 14 at the bottom of the piston rod 1 from the notch opened at the lower end of the nut 7 and the oil return through hole 3 of the piston rod 1, and finally returns to the lubrication station; in this structure, the copper sleeve 9 is installed in the cover body 8, and then the copper sleeve 9 is blocked by the flange 10. The cover body 8 is processed with two lubrication holes on the outer surface, namely the oil inlet hole 11 and the oil outlet hole 12, which lead to the copper sleeve 9 in the middle and face the notch on the copper sleeve 9, so that the lubricating oil can flow to the inner wall of the copper sleeve 9 and contact with the piston rod 1 for full lubrication. When the lubricating oil fills the inside of the notch of the copper sleeve 9, the lubricating oil flows to the oil outlet under the push of the continuous lubricating oil, and returns to the lubrication station from the oil outlet.

[0023] Through the oil filling hole 6, cover body 8, flange 10, oil inlet hole 11, and oil outlet hole 12, the friction between the piston rod 1 and the copper sleeve 9 can be reduced by the action of lubricating oil during high-speed friction, and the lubricating oil can take away part of the heat on the copper sleeve 9 to play a cooling role. At the same time, the lubricating oil can reduce the mutual wear between parts and can meet the working conditions of the high-speed punching machine. When the number of strokes per minute is small, the number of times the piston rod 1 and the copper sleeve 9 are lubricated can be reduced.

[0024] like Figures 1-4As shown, a first Y-ring 15 is provided between the piston body 4 and the cylinder body 2 , a second Y-ring 16 is provided between the cover body 8 and the copper sleeve 9 , and a third Y-ring 17 is provided between the piston rod 1 and the flange 10 .

[0025] During use, the first Y-ring 15 is arranged between the piston body 4 and the cylinder body 2, which effectively prevents the leakage of high-pressure gas or liquid and ensures the stability of the working pressure of the balancing cylinder; the second Y-ring 16 is installed between the cover body 8 and the copper sleeve 9, playing a similar sealing role and preventing the lubricating oil from leaking from the gap between the copper sleeve 9 and the cover body 8; the third Y-ring 17 is arranged between the piston rod 1 and the flange 10, further enhancing the sealing of the connection between the piston rod 1 and the flange 10, improving the sealing performance of the balancing cylinder, and ensuring the stability of the working pressure and the effective use of the lubricating oil.

[0026] like Figure 1-Figure 3 As shown, a first O-ring 18 is provided between the cylinder body 2 and the cover body 8 , a second O-ring 19 is provided between the cover body 8 and the flange 10 , and a guide ring 20 is provided between the inner wall of the cylinder body 2 and the piston body 4 .

[0027] During use, the first O-ring 18 is disposed between the cylinder body 2 and the cover body 8, performing a sealing and anti-loosening function, thereby ensuring a tight connection between the cylinder body 2 and the cover body 8; the second O-ring 19 is installed between the cover body 8 and the flange 10, also performing a sealing and fixing function, thereby enhancing the connection strength between the cylinder body 2 and the cover body 8, and between the cover body 8 and the flange 10, thereby preventing leakage caused by looseness, and improving the overall sealing performance of the equipment, thereby ensuring the normal operation and safety of the equipment. The guide ring 20 facilitates the guidance and support of the movement of the piston body 4, ensuring the smooth movement of the piston body 4 within the cylinder body 2, improving the movement accuracy and stability of the piston body 4, and reducing friction and wear caused by unstable movement.

[0028] like Figures 1-4 As shown, the left and right sides of the outer wall of the copper sleeve 9 are respectively provided with saddle screw holes 21 , and a spherical washer 22 is fixed between the piston rod 1 and the fixing seat 13 .

[0029] During use, the saddle screw holes 21 facilitate the use of bolts to securely connect the copper sleeve 9 to the cover 8, preventing the copper sleeve 9 from rotating or loosening during high-speed movement, improving the strength and stability of the connection between the copper sleeve 9 and the cover 8, and ensuring good lubrication and sealing between the piston rod 1 and the copper sleeve 9. The spherical washer 22 effectively absorbs the offset and impact force generated by movement, providing better adaptability and shock absorption, not only improving the connection stability between the piston rod 1 and the fixing seat 13, but also reducing noise and vibration during operation, thereby improving overall comfort and safety.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lubricating structure for a piston rod of a balancing cylinder of a press, comprising a piston rod (1), wherein the piston rod (1) is slidably inserted into a cylinder body (2), and is characterized in that: The piston rod (1) is provided with an oil return hole (3), a piston body (4) is provided between the piston rod (1) and the cylinder body (2), a top cover (5) is provided at the top end of the cylinder body (2), an oil filling hole (6) is provided on the top surface of the top cover (5), a nut (7) is provided between the piston rod (1) and the top cover (5), a notch is provided at the lower end of the nut (7), a cover (8) is fixed to the bottom surface of the cylinder body (2), and a total inlet is provided on the cover (8). An air port is provided between the cover body (8) and the piston rod (1), a copper sleeve (9) is provided with a notch, a flange (10) is provided between the copper sleeve (9) and the cover body (8), an oil inlet hole (11) is provided on the right side of the cover body (8), an oil outlet hole (12) is provided on the left side of the cover body (8), a fixing seat (13) is provided at the bottom end of the piston rod (1), and an oil return box (14) is fixed between the fixing seat (13) and the piston rod (1).

2. The lubrication structure for the piston rod of a balancing cylinder of a press according to claim 1, characterized in that: A first Y-shaped ring (15) is provided between the piston body (4) and the cylinder body (2), a second Y-shaped ring (16) is provided between the cover body (8) and the copper sleeve (9), and a third Y-shaped ring (17) is provided between the piston rod (1) and the flange (10).

3. The lubricating structure for the piston rod of a balancing cylinder of a press machine according to claim 2, characterized in that: A first O-ring (18) is provided between the cylinder body (2) and the cover body (8), and a second O-ring (19) is provided between the cover body (8) and the flange (10).

4. The lubricating structure for the piston rod of a balancing cylinder of a press machine according to claim 3, characterized in that: A guide ring (20) is provided between the inner wall of the cylinder (2) and the piston body (4).

5. The lubricating structure for the piston rod of a balancing cylinder of a press machine according to claim 1, characterized in that: The left side and the right side of the outer wall of the copper sleeve (9) are respectively provided with saddle screw holes (21).

6. The lubricating structure for the piston rod of a balancing cylinder of a press machine according to claim 5, characterized in that: A spherical washer (22) is fixed between the piston rod (1) and the fixing seat (13).

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