Pressurizing double-speed oil hydraulic cylinder

Abstract

The utility model relates to the technical field of hydraulic cylinders, in particular to a pressurizing double-speed hydraulic cylinder which comprises a front end cover, a first cylinder barrel, a second cylinder barrel, a third cylinder barrel and a pressurizing body, the front end cover, the second cylinder barrel and the pressurizing body are in threaded connection through a plurality of second bolts and third bolts, and a spring is arranged on the left side of a valve element. The front side and the rear side of the outer wall of the spring pressing block are fixedly connected with the pressurizing body. Through the cooperation of the second piston, the piston rod, the first piston, the pressurization piston, the valve element, the spring and the spring pressing block, after the stroke of the second piston reaches the position of the front end cover, the oil cylinder has the pressurization function, and as long as a thrust signal continues to be given, oil pressure can push the first piston and the second piston with 2.5 times of pressure; and after hydraulic oil flows into an oil port at the front end cover under the pressurization of a pump station and needs strong force (the piston II) to retreat in place, the piston I is automatically switched inside to quickly retreat, and the pressurizing double-speed oil hydraulic cylinder can greatly shorten the reciprocating cycle time and improve the productivity and the performance.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically a booster dual-speed hydraulic cylinder. Background Technology

[0002] Dual-speed hydraulic cylinders are specially designed hydraulic cylinders that can achieve two different movement speeds during operation. They are typically used in applications requiring rapid idle strokes and slow working strokes to improve efficiency and meet process requirements. However, existing dual-speed hydraulic cylinders lack a specific pressure boosting structure, resulting in slow retraction and return to their original position, leading to long reciprocating cycles and reduced productivity and performance. Utility Model Content

[0003] The purpose of this invention is to solve the problem that the device cannot quickly retract and return to its original position, resulting in a long reciprocating cycle time and a decrease in production capacity and performance. Therefore, a booster dual-speed hydraulic cylinder is proposed.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A booster dual-speed hydraulic cylinder is designed, comprising a front end cover, cylinder one, cylinder two, cylinder three, and a booster body. The front end cover, cylinder two, and booster body are fixedly connected by multiple bolts two and three. Cylinder three is pressed and fixed to the inner side of cylinder two and booster body. A protective end cap is attached to the right side of the inner wall of cylinder three, and cylinder one is fixed to the left side of the protective end cap. Piston one is attached to the inner wall of cylinder one, and a piston rod is fixed to the inner wall of piston one. Piston two is sleeved on the left side of the outer wall of piston rod. The outer wall of piston two is... The cylinder and barrel are fitted together. The left inner wall of the front end cover is fixedly connected to the pressure ring by bolt one. A guide sleeve is fixedly connected to the inner wall of the pressure ring. The right side of the booster body is fixedly connected to the rear end cover by bolt four. A booster piston is fitted to the inner wall of the booster body. A valve core is machined on the inner wall of the booster piston. A spring is provided on the left side of the valve core. The two sides of the spring are fixedly connected to the booster piston and the spring pressure block, respectively. The front and rear sides of the outer wall of the spring pressure block are fixedly connected to the booster body, and the outer wall of the spring pressure block is slidably connected to the inner wall of the booster piston.

[0006] Preferably, a guide ring 1 is sleeved at the center of the outer wall of piston 2, and a guide ring 2 is sleeved at the center of the outer wall of piston 1.

[0007] Preferably, the inner wall of the guide sleeve is fitted to the piston rod by a plurality of sealing rings 10, the outer wall of the guide sleeve is fitted to the front end cover by a sealing ring 9, and the inner wall of the front end cover is fitted to the piston rod by a sealing ring 11.

[0008] Preferably, the outer wall of the piston two is fitted to the cylinder two through multiple sealing rings seven, the inner wall of the piston two is fitted to the cylinder one through a sealing ring one, and the sealing rings six on both sides of the outer wall of the cylinder three are fitted to the cylinder two and the booster body respectively.

[0009] Preferably, the outer wall of the piston is fitted to the cylinder by a plurality of sealing rings 2, and the right inner wall of the front end cover is fitted to the cylinder by a plurality of sealing rings 8.

[0010] Preferably, the outer walls of the booster piston are respectively bonded to the booster body via sealing ring five and sealing ring three, and the left outer wall of the rear end cover is bonded to the booster body via sealing ring four.

[0011] The beneficial effects of the booster dual-speed hydraulic cylinder proposed in this utility model are as follows:

[0012] Through the cooperation between piston two, piston rod, piston one, booster piston, valve core, spring, and spring clamping block, when piston two reaches the position of the front cover, piston one continues to push simultaneously. When the front end of the piston rod encounters external resistance, the piston rod may not reach its final position due to unknown factors, resulting in an incomplete stroke between piston one and piston two. This hydraulic cylinder has a boosting function, namely the combination of booster piston, valve core, spring, and spring clamping block. As long as a thrust signal is continuously given, the hydraulic pressure will push piston one and piston two with 2.5 times the pressure. During retraction, the hydraulic oil, pressurized by the pump station, flows into the oil port at the front cover. After piston two has retracted to its final position, the internal system automatically switches to piston one for rapid retraction. This booster dual-speed hydraulic cylinder can significantly shorten the reciprocating cycle time and improve productivity and performance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the right-side structure of this utility model;

[0017] Figure 5 This utility model Figure 3 The structural diagram at point AA is shown.

[0018] In the diagram: 1. Front end cap, 2. Sealing ring one, 3. Guide sleeve, 4. Sealing ring two, 5. Sealing ring three, 6. Sealing ring four, 7. Sealing ring five, 8. Sealing ring six, 9. Sealing ring seven, 10. Pressure ring, 11. Bolt one, 12. Sealing ring eight, 13. Sealing ring nine, 14. Piston two, 15. Sealing ring ten, 16. Sealing ring eleven, 17. Cylinder one, 18. Guide ring one, 19. Cylinder two, 20. Piston one, 21. Piston rod, 22. Bolt two, 23. Guide ring two, 24. Protective end cap, 25. Cylinder three, 26. Pressure booster body, 27. Spring washer, 28. Bolt three, 29. Pressure booster piston, 30. Valve core, 31. Spring, 32. Spring pressure block, 33. Rear end cap, 34. Bolt four. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] See attached document Figure 1-5 In this embodiment, a booster dual-speed hydraulic cylinder includes a front end cover 1, a first cylinder 17, a second cylinder 19, a third cylinder 25, and a booster body 26. The front end cover 1, the second cylinder 19, and the booster body 26 are fixedly connected by multiple bolts 22 and 38. The third cylinder 25 is pressed and fixed to the inner side of the second cylinder 19 and the booster body 26. The third cylinder 25 can be restricted and fixed by the second cylinder 19 and the booster body 26. The right side of the inner wall of the third cylinder 25 is attached to... The system includes a protective end cap 24, with a cylinder 17 fixedly attached to its left side. A piston 20 is fitted to the inner wall of the cylinder 17, and a piston rod 21 is fixedly attached to the inner wall of the piston 20. A piston 24 is sleeved on the left side of the outer wall of the piston rod 21, and the outer wall of the piston 24 fits against the cylinder 2 19. The inner left side of the front end cap 1 is fixedly connected to the pressure ring 10 by bolt 11. A guide sleeve 3 is fixedly attached to the inner wall of the pressure ring 10, restricting the piston rod 21 to move only... The pressurizing body 26 moves telescopically rather than rotating. The right side of the pressurizing body 26 is fixedly connected to the rear end cover 33 by bolts 34. The inner wall of the pressurizing body 26 is fitted with a pressurizing piston 29. The inner wall of the pressurizing piston 29 is machined with a valve core 30. The inside of the valve core 30 is a hydraulic oil flow channel. When the pressurizing piston 29 is pushed open to the left, there is a gap between it and the rear end cover 33. The hydraulic oil will flow into the inside of the valve core 30. A spring 31 is provided on the left side of the valve core 30. The model of the spring 31 can be determined according to the specific application requirements. The spring 31 needs to have a preset pressure to squeeze the pressurizing piston 29 against the inner wall of the rear end cover 33. When pressurizing, the oil pressure needs to overcome the elastic force of the spring 31 to push the pressurizing piston 29. The two sides of the spring 31 are fixedly connected to the pressurizing piston 29 and the spring pressure block 32, respectively. The front and rear sides of the outer wall of the spring pressure block 32 are fixedly connected to the pressurizing body 26, and the outer wall of the spring pressure block 32 is slidably connected to the inner wall of the pressurizing piston 29.

[0021] See attached document Figure 1-5In this embodiment, a guide ring 18 is fitted around the center of the outer wall of piston 24, and a guide ring 28 is fitted around the center of the outer wall of piston 20. The inner wall of guide sleeve 3 is fitted to piston rod 21 through multiple sealing rings 10 15. The outer wall of guide sleeve 3 is fitted to front end cover 1 through sealing ring 9 13. The inner wall of front end cover 1 is fitted to piston rod 21 through sealing ring 11 16. The outer wall of piston 24 is fitted to cylinder 2 19 through multiple sealing rings 7 9. The inner wall of piston 24 is fitted to cylinder 1 17 through sealing ring 1 2. The outer walls of cylinder 3 25 are fitted with sealing rings 6 on both sides. 8 is respectively attached to cylinder 19 and booster body 26. The outer wall of piston 20 is attached to cylinder 17 through multiple sealing rings 24. The right inner wall of front cover 1 is attached to cylinder 19 through multiple sealing rings 812. The outer walls of booster piston 29 are attached to booster body 26 through sealing rings 57 and 35 on both sides. The left outer wall of rear cover 33 is attached to booster body 26 through sealing ring 46. Each sealing ring ensures that the structure on both sides can move relative to each other and ensures sealing during the movement. The specific type of sealing ring can be determined according to the usage requirements.

[0022] Working principle:

[0023] When this booster dual-speed hydraulic cylinder is needed, the user can first connect an external hydraulic oil pump and oil supply pipe to the oil ports of the front cover 1 and the rear cover 33, respectively. During use, when the cylinder is pushed forward, hydraulic oil, pressurized by the pump station, flows through the oil port at the rear cover 33 and sequentially through the booster piston 29, simultaneously pushing piston 20 and the protective end cover 24. After the hydraulic oil flows through the rear cover 33, it needs to accumulate to a certain oil pressure (boost) to open the booster piston 29, which is currently compressed by the spring 31, causing it to move to the left. This creates a gap between the booster piston 29 and the rear cover 33. Through this gap and the flow of the valve core 30, hydraulic oil is delivered to the left side of the booster body 26, thus achieving the booster process. When piston 2 14 reaches the position of the front cover 1, piston 20 continues to push simultaneously. Due to the different diameters at the piston structure, pistons 14 and 20 drive piston rod 21 in a fast and slow process, which is the operation of the dual-speed hydraulic cylinder. When the front end of piston rod 21 is subjected to external resistance, piston rod 21 may not reach its full position due to unknown factors, resulting in an incomplete stroke between piston 20 and piston 14. This hydraulic cylinder has a boosting function, namely the combination of boosting piston 29, valve core 30, spring 31, and spring clamping block 32. As long as a thrust signal is continuously supplied, the hydraulic pressure will push piston 20 and piston 14 with 2.5 times the pressure. During retraction, the hydraulic oil, pressurized by the pump station, flows into the oil port at the front cover 1. After the piston 24 has retracted to its full position, the internal system automatically switches to piston 20 for rapid retraction. This boosted dual-speed hydraulic cylinder can significantly shorten the reciprocating cycle time and improve productivity and performance.

[0024] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A pressure boosting double speed hydraulic cylinder comprising a front end cover (1), a cylinder one (17), a cylinder two (19), a cylinder three (25) and a pressure boosting body (26), characterized in that: The front end cover (1), cylinder two (19) and the booster body (26) are fixedly connected through a plurality of bolts two (22) and bolts three (28), the inner side of the cylinder two (19) and the booster body (26) is tightly fixed with cylinder three (25), the inner wall right side of the cylinder three (25) is attached with the protection end cover (24), the left side of the protection end cover (24) is fixedly connected with the cylinder one (17), the inner wall of the cylinder one (17) is attached with the piston one (20), the inner wall of the piston one (20) is fixedly connected with the piston rod (21), the outer wall left side of the piston rod (21) is sleeved with the piston two (14), the outer wall of the piston two (14) is attached with the cylinder two (19), the left inner wall of the front end cover (1) is fixedly connected with the compression ring (10) through the bolt one (11), the inner wall of the compression ring (10) is fixedly connected with the guide sleeve (3), the right side of the booster body (26) is fixedly connected with the rear end cover (33) through the bolt four (34), the inner wall of the booster body (26) is attached with the booster piston (29), the inner wall of the booster piston (29) is processed with the valve core (30), the left side of the valve core (30) is provided with the spring (31), the two sides of the spring (31) are fixedly connected with the booster piston (29) and the spring pressing block (32) respectively, the outer wall front and back sides of the spring pressing block (32) are fixedly connected with the booster body (26), and the outer wall of the spring pressing block (32) is slidably connected with the inner wall of the booster piston (29).

2. The pressure boosted two speed hydraulic cylinder of claim 1, wherein: The outer wall center of the piston two (14) is sleeved with the guide ring one (18), and the outer wall center of the piston one (20) is sleeved with the guide ring two (23).

3. The pressure boosted two speed hydraulic cylinder of claim 1, wherein: The inner wall of the guide sleeve (3) is attached with the piston rod (21) through a plurality of sealing rings ten (15), the outer wall of the guide sleeve (3) is attached with the front end cover (1) through the sealing ring nine (13), and the inner wall of the front end cover (1) is attached with the piston rod (21) through the sealing ring eleven (16).

4. The pressure boosted two speed hydraulic cylinder of claim 1, wherein: The outer wall of the piston two (14) is attached with the cylinder two (19) through a plurality of sealing rings seven (9), the inner wall of the piston two (14) is attached with the cylinder one (17) through the sealing ring one (2), and the outer wall two sides of the cylinder three (25) are respectively attached with the cylinder two (19) and the booster body (26) through the sealing ring six (8).

5. The power boosted two speed hydraulic cylinder of claim 1, wherein: The outer wall of the piston one (20) is attached with the cylinder one (17) through a plurality of sealing rings two (4), and the right inner wall of the front end cover (1) is attached with the cylinder two (19) through a plurality of sealing rings eight (12).

6. The power boosted two speed hydraulic cylinder of claim 1, wherein: The outer wall two sides of the booster piston (29) are respectively attached with the booster body (26) through the sealing ring five (7) and the sealing ring three (5), and the left outer wall of the rear end cover (33) is attached with the booster body (26) through the sealing ring four (6).

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