Hydraulic machine oil cylinder
By setting sealing grooves at both ends of the piston rod and cylinder block of the hydraulic cylinder and combining with the multi-cylinder design, the problem of oil leakage in the oil cylinder is solved, achieving more efficient oil sealing effect and extrusion stability.
Patent Information
- Application Number
- CN202422194858.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-06
AI Technical Summary
During the movement of the oil cylinder of traditional hydraulic presses, oil is prone to flow out of the gap, resulting in oil leakage.
Seal grooves are set at both ends of the piston rod, and seal grooves are set at the corresponding positions of the cylinder block to block the outflow of oil through the sealing ring. Combined with the design of multiple cylinders and guide rods, it ensures that the oil does not leak during movement.
It effectively reduces oil leakage in the oil cylinder and improves the extrusion stability and efficiency of the hydraulic press.
Smart Images
Figure CN223089664U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic presses, and in particular to a hydraulic cylinder of a hydraulic press. Background Art
[0002] A hydraulic press is a device used for extrusion forming of products. An upper template is pushed by a hydraulic cylinder or a pneumatic cylinder to cooperate with a lower template to extrude the product. It is usually used to extrude metals or plastics to form the required shape to form products. During the extrusion process of the hydraulic press, there are usually two strokes. One stroke is longer and the movement speed is faster. During this stroke, the upper template does not contact the product, so it can move quickly. The other stroke needs to continue extrusion after contacting the product. A relatively large force needs to be overcome during the process to extrude the product into shape. Therefore, a greater pressure is required for this stroke and it moves at a slower speed.
[0003] In the traditional hydraulic cylinder, in order to increase the mobility of the piston rod during the movement process, a certain gap is usually left. However, this type of hydraulic cylinder is usually prone to oil leakage from the gap, which easily leads to oil leakage of the hydraulic cylinder. Content of the Utility Model
[0004] In order to solve the problem that oil in the prior art hydraulic cylinder usually easily leaks out from the gap, which easily leads to oil leakage of the hydraulic cylinder, this application provides a hydraulic cylinder of a hydraulic press, and the specific scheme is as follows.
[0005] A hydraulic cylinder of a hydraulic press includes a cylinder body for injecting oil. A piston rod driven by the oil is arranged in the cylinder body. The piston rod is slidably connected to the cylinder body. One end of the piston rod extending into the cylinder body is provided with a piston barrel. A plurality of sealing grooves are formed in the piston barrel, and sealing rings are arranged in the sealing grooves. A plurality of relief grooves corresponding to the piston rod are also arranged at the end of the cylinder body.
[0006] By adopting the above technical scheme, sealing grooves capable of accommodating sealing rings are formed in the piston barrel at one end of the piston rod, and corresponding sealing grooves capable of accommodating sealing rings are formed in the cylinder body at the other end of the piston rod, so that the oil in the piston rod can be blocked at two positions. Through the design of the piston barrel, a certain movement space can be left between the piston rod and the cylinder body, and the piston barrel can move along with the piston rod. Moreover, the sealing rings at the sealing grooves can block the oil, reducing the oil leakage from the hydraulic cylinder.
[0007] Optionally, the cylinder block includes a first cylinder barrel, a second cylinder barrel, and a third cylinder barrel. The second cylinder barrel is slidably connected within the first cylinder barrel and slides along the length direction of the first cylinder barrel. An oil groove is provided on the second cylinder barrel corresponding to the third cylinder barrel, and the third cylinder barrel is fixedly arranged within the oil groove of the second cylinder barrel. The piston rod is slidably connected within the third cylinder barrel, the piston barrel abuts against the inner wall of the third cylinder barrel, the piston rod slides along the length direction of the third cylinder barrel, and the relief groove is also provided at the end of the third cylinder barrel.
[0008] By adopting the above technical solution, the second cylinder barrel can slide along the first cylinder barrel. The sliding of the second cylinder barrel enables the oil cylinder to perform a relatively fast and long-stroke first-stage movement, while the sliding of the piston rod at the third cylinder barrel can perform a slow movement with a large pressure within a short stroke.
[0009] Optionally, an oil injection port is provided on the second cylinder barrel corresponding to the position of the oil groove. The oil injection port is communicated with the oil groove. After the oil liquid is injected into the oil groove, it can push the piston rod to move, and when the oil liquid is drawn out, the piston rod retracts.
[0010] By adopting the above technical solution, an oil injection port is provided on the second cylinder barrel, which can introduce the oil liquid into the oil groove to pressurize the piston rod, thereby driving the piston rod to perform an extrusion action, and sucking out the oil liquid can retract the piston rod again.
[0011] Optionally, a guide rod is fixedly arranged within the first cylinder barrel corresponding to the second cylinder barrel. The guide rod is arranged along the length direction of the first cylinder barrel, and the second cylinder barrel is sleeved on the guide rod and is slidably connected to the guide rod.
[0012] By adopting the above technical solution, the guide rod is arranged along the first cylinder barrel, and the second cylinder barrel is sleeved on the guide rod. The guide rod can guide the movement of the second sleeve, thereby reducing the situation of the second cylinder barrel offsetting during the movement process and improving the stability of extrusion.
[0013] Optionally, a sealing groove is also provided on the inner wall of the second cylinder barrel corresponding to the guide rod, and a sealing ring is placed within the sealing groove.
[0014] By adopting the above technical solution, a sealing groove is provided on the inner wall of the second cylinder barrel, which can reduce the situation of oil leakage caused by the oil liquid flowing out between the second cylinder barrel and the first cylinder barrel.
[0015] Optionally, a piston block is provided on the outer wall of the second cylinder barrel, and the piston block is used to abut against the inner wall of the first cylinder barrel.
[0016] By adopting the above technical solution, the piston block of the second cylinder can form interference with the inner wall of the first cylinder, leaving a certain movement gap between the second cylinder and the first cylinder. The piston block can also play a guiding role with the first cylinder, further improving the stability of extrusion.
[0017] Optionally, a sealing groove for placing a sealing ring is also provided on the piston block.
[0018] By adopting the above technical solution, a sealing groove is also provided on the piston block. The sealing block can move along with the second cylinder, so it is easy for oil to leak from the gap. Therefore, the sealing groove on the piston block can reduce the leakage of oil from the gap, further improving the sealing effect on the oil.
[0019] Optionally, a guide ring is further provided at the end of the first cylinder. The guide ring is detachably connected to the first cylinder, abuts against the second cylinder, and a plurality of sealing grooves for placing sealing rings are also provided on the inner wall of the guide ring.
[0020] By adopting the above technical solution, the detachable guide ring provided at the end can facilitate the disassembly and assembly of the oil cylinder, and can also guide the second cylinder to a certain extent, further improving the stability of extrusion.
[0021] Optionally, an oil injection port is also provided at the end of the first cylinder. The oil injection port is used to inject oil into the interior of the first cylinder. When the oil is injected into the first cylinder, the second cylinder slides along the first cylinder.
[0022] By adopting the above technical solution, an oil injection port is provided at the end of the first cylinder. The second cylinder in the first cylinder can be driven by oil pressure, thereby realizing the driving of the second cylinder.
[0023] In summary, the present application has at least the following beneficial effects:
[0024] 1. The present application solves the problem that oil in the oil cylinder usually easily flows out from the gap in the prior art, which easily causes oil leakage in the oil cylinder. The present application seals the oil at both ends of the piston rod by providing sealing grooves at both ends of the piston rod, reducing the leakage of oil from the oil cylinder.
[0025] 2. The present application also further reduces the oil leakage by providing multiple cylinders and multiple sealing grooves on each cylinder. After being placed in the sealing grooves, the oil can be blocked at various positions. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 is a perspective view of this embodiment.
[0027] Figure 2It is a sectional view of this embodiment.
[0028] Explanation of reference numerals:
[0029] 1. Cylinder block; 11. First cylinder barrel; 111. Guide rod; 112. Guide ring; 12. Second cylinder barrel; 121. Piston block; 122. Oil injection port; 123. Oil groove; 13. Third cylinder barrel; 14. Sealing groove
[0030] 2. Piston rod; 21. Piston cylinder; 22. Nut Specific implementation mode
[0031] The following further details the present application through specific embodiments in conjunction with the accompanying drawings.
[0032] A hydraulic oil cylinder, as Figure 1 and Figure 2 shown, includes a cylinder block 1 for injecting oil, a piston rod 2 driven by the oil is arranged in the cylinder block 1, the piston rod 2 is slidably connected to the cylinder block 1, a piston cylinder 21 is arranged at one end of the piston rod 2 extending into the cylinder block 1, a plurality of sealing grooves 14 are formed on the piston cylinder 21, and sealing rings are arranged in the sealing grooves 14. Corresponding to the piston rod 2, a plurality of relief grooves are also arranged at the end of the cylinder block 1. During specific implementation, the piston cylinder 21 is fixed on the piston rod 2 through a nut 22, and the sealing grooves 14 can block both ends of the piston rod 2, thereby reducing the leakage of oil from the oil cylinder.
[0033] As Figure 1 and Figure 2 shown, the cylinder block 1 includes a first cylinder barrel 11, a second cylinder barrel 12 and a third cylinder barrel 13. The second cylinder barrel 12 is slidably connected in the first cylinder barrel 11 and slides along the length direction of the first cylinder barrel 11. An oil groove 123 is formed on the second cylinder barrel 12 corresponding to the third cylinder barrel 13, and the third cylinder barrel 13 is fixedly arranged in the oil groove 123 of the second cylinder barrel 12. The piston rod 2 is slidably connected in the third cylinder barrel 13, the piston cylinder 21 abuts against the inner wall of the third cylinder barrel 13, and the piston rod 2 slides along the length direction of the third cylinder barrel 13. The relief groove is also arranged at the end of the third cylinder barrel 13. During specific implementation, an oil groove 123 is also formed on the first cylinder barrel 11, the second cylinder barrel 12 is embedded in the oil groove 123, the second cylinder barrel 12 can slide in the chute, the third cylinder barrel 13 is embedded in the oil groove 123 of the second cylinder barrel 12, and the third cylinder barrel 13 can be in the oil groove 123.
[0034] As Figure 1 and Figure 2As shown, an oil injection port 122 is provided at a position corresponding to the oil groove 123 on the second cylinder barrel 12. The oil injection port 122 is communicated with the oil groove 123. After the oil fluid is injected into the oil groove 123, it can push the piston rod 2 to move, and when the oil fluid is drawn out, the piston rod 2 retracts. In specific implementation, the oil fluid can enter from the oil injection port 122 to form extrusion on the piston rod 2, so that the piston rod 2 moves along the third cylinder barrel 13. And when the oil fluid is drawn back, the piston rod 2 can be pulled back to realize the overall action of the hydraulic press.
[0035] As Figure 1 and Figure 2 shown, a guide rod 111 is fixedly arranged corresponding to the second cylinder barrel 12 inside the first cylinder barrel 11. The guide rod 111 is arranged along the length direction of the first cylinder barrel 11. The second cylinder barrel 12 is sleeved on the guide rod 111 and is slidably connected with the guide rod 111. In specific implementation, the guide rod 111 is fixed on the first cylinder barrel 11 through a nut 22. A sealing groove 14 is also provided at the abutting position of the guide rod 111 and the first cylinder barrel 11, and a sealing ring is placed therein to further reduce the leakage of the oil fluid.
[0036] As Figure 1 and Figure 2 shown, a sealing groove 14 is also provided on the inner wall of the second cylinder barrel 12 corresponding to the guide rod 111, and a sealing ring is placed in the sealing groove 14. A piston block 121 is fixedly arranged on the outer wall of the second cylinder barrel 12, and the piston block 121 is used to abut against the inner wall of the first cylinder barrel 11. A sealing groove 14 for placing a sealing ring is also provided on the piston block 121. In specific implementation, the piston block 121 is directly integrally arranged with the second cylinder barrel 12.
[0037] As Figure 1 and Figure 2 shown, a guide ring 112 is further provided at the end of the first cylinder barrel 11. The guide ring 112 is detachably connected with the first cylinder barrel 11. The guide ring 112 abuts against the second cylinder barrel 12, and a plurality of sealing grooves 14 for placing sealing rings are also provided on the inner wall of the guide ring 112. In specific implementation, the guide ring 112 is detachably connected with the first cylinder barrel 11 through bolts.
[0038] As Figure 1 and Figure 2 shown, an oil injection port 122 is also provided at the end of the first cylinder barrel 11. The oil injection port 122 is used for injecting oil fluid into the inside of the first cylinder barrel 11. When the oil fluid is injected into the first cylinder barrel 11, the second cylinder barrel 12 slides along the first cylinder barrel 11. In specific implementation, the oil injection port 122 is driven by the same principle as the oil injection port 122 on the third cylinder barrel 13.
[0039] Working principle: First, inject the hydraulic fluid into the first cylinder barrel 11 to drive the second cylinder barrel 12 to perform a rapid movement with a longer stroke. Then, inject the hydraulic fluid into the second cylinder barrel 12 to drive the piston rod 2 and perform a slow movement with a shorter stroke, thus completing the extrusion of the hydraulic press.
[0040] The above is the preferred embodiment of the present application. It does not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.
Claims
1. A hydraulic oil cylinder, characterized in that: It includes a cylinder block (1) for injecting oil. A piston rod (2) driven by the oil is arranged in the cylinder block (1). The piston rod (2) is slidably connected to the cylinder block (1). One end of the piston rod (2) extending into the cylinder block (1) is provided with a piston cylinder (21). A plurality of sealing grooves (14) are formed in the piston cylinder (21), and sealing rings are placed in the sealing grooves (14). The end of the cylinder block (1) corresponding to the piston rod (2) is also provided with a plurality of relief grooves.
2. The hydraulic oil cylinder according to claim 1, wherein: The cylinder block (1) includes a first cylinder barrel (11), a second cylinder barrel (12) and a third cylinder barrel (13). The second cylinder barrel (12) is slidably connected in the first cylinder barrel (11). The second cylinder barrel (12) slides along the length direction of the first cylinder barrel (11). An oil groove (123) is formed in the second cylinder barrel (12) corresponding to the third cylinder barrel (13). The third cylinder barrel (13) is fixedly arranged in the oil groove (123) of the second cylinder barrel (12). The piston rod (2) is slidably connected in the third cylinder barrel (13). The piston cylinder (21) abuts against the inner wall of the third cylinder barrel (13). The piston rod (2) slides along the length direction of the third cylinder barrel (13). The relief grooves are also arranged at the end of the third cylinder barrel (13).
3. A hydraulic oil cylinder according to claim 2, characterized in that: An oil injection port (122) is formed in the second cylinder barrel (12) corresponding to the position of the oil groove (123). The oil injection port (122) is communicated with the oil groove (123). After the oil is injected into the oil groove (123), it can push the piston rod (2) to move. When the oil is drawn out, the piston rod (2) retracts.
4. A hydraulic oil cylinder according to claim 3, characterized in that: A guide rod (111) is fixedly arranged in the first cylinder barrel (11) corresponding to the second cylinder barrel (12). The guide rod (111) is arranged along the length direction of the first cylinder barrel (11). The second cylinder barrel (12) is sleeved on the guide rod (111) and is slidably connected to the guide rod (111).
5. A hydraulic oil cylinder according to claim 4, characterized in that: Sealing grooves (14) are also formed in the inner wall of the second cylinder barrel (12) corresponding to the guide rod (111), and sealing rings are placed in the sealing grooves (14).
6. The hydraulic oil cylinder according to claim 4, characterized in that: A piston block (121) is arranged on the outer wall of the second cylinder barrel (12), and the piston block (121) is used to abut against the inner wall of the first cylinder barrel (11).
7. A hydraulic oil cylinder according to claim 6, wherein: Sealing grooves (14) for placing sealing rings are also formed in the piston block (121).
8. A hydraulic oil cylinder according to claim 4, characterized in that: A guide ring (112) is further arranged at the end of the first cylinder barrel (11). The guide ring (112) is detachably connected to the first cylinder barrel (11). The guide ring (112) abuts against the second cylinder barrel (12). A plurality of sealing grooves (14) for placing sealing rings are also formed in the inner wall of the guide ring (112).
9. A hydraulic oil cylinder according to claim 3, characterized in that: An oil injection port (122) is also formed at the end of the first cylinder barrel (11). The oil injection port (122) is used to inject oil into the interior of the first cylinder barrel (11). When the oil is injected into the first cylinder barrel (11), the second cylinder barrel (12) slides along the first cylinder barrel (11).