Large high-pressure-resistant oil cylinder casting

Abstract

The utility model relates to the technical field of oil cylinders, in particular to a large-scale high-pressure-resistant oil cylinder casting which comprises a cylinder body and a piston rod, and the piston rod extends out of a telescopic port of the cylinder body in a sliding mode. A lubricating box sleeving the periphery of the piston rod is fixed to the upper end of the cylinder body, an oil storage cavity is formed in the lubricating box, and a plurality of lubricating balls surrounding the periphery of the piston rod are connected to the upper portion and the lower portion of the inner wall of the lubricating box in a rolling mode and extend into the oil storage cavity. An annular partition plate close to the lubricating beads is fixed in the oil storage cavity; according to the oil cylinder, the piston rod and the telescopic port of the cylinder body can be effectively lubricated, the situation that the joint of the piston rod and the telescopic port of the cylinder body is seriously abraded is effectively prevented, large friction damping caused by external dust to the joint of the piston rod and the telescopic port of the cylinder body is prevented, the oil cylinder works more smoothly, and the service life of the oil cylinder is prolonged. And the high-pressure resistance of the oil cylinder is effectively ensured.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a large high-pressure resistant hydraulic cylinder casting. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating or oscillating motion. It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device and has no transmission backlash, resulting in smooth movement. Therefore, it is widely used in the hydraulic systems of various machines. The output force of a hydraulic cylinder is directly proportional to the effective area of ​​the piston and the pressure difference between its two sides.

[0003] In existing technologies, the piston rod moves in and out of the cylinder through the cylinder's telescopic port during extension and retraction. After prolonged use, the lubrication effect between the piston rod and the cylinder's telescopic port is limited, easily causing severe wear at the connection point. Furthermore, existing hydraulic cylinders cannot effectively prevent dust from entering the cylinder's telescopic port. Under high-pressure operation, dust can easily cause significant frictional damping at the connection point between the piston rod and the cylinder's telescopic port, resulting in less smooth high-pressure movement and poor high-pressure resistance. Utility Model Content

[0004] This utility model provides a large high-pressure resistant hydraulic cylinder casting, which facilitates convenient lubrication of the extension and retraction ports of the piston rod and cylinder body, and also facilitates dustproof treatment at the connection between the piston rod and the extension and retraction ports of the cylinder body.

[0005] In order to solve the problems of the prior art, this utility model discloses a large high-pressure resistant hydraulic cylinder casting, including a cylinder body and a piston rod, wherein the piston rod slides out of the top of the cylinder body telescopic port;

[0006] The upper end of the cylinder is fixed with a lubrication box sleeved around the piston rod. The lubrication box has an oil storage chamber inside, and several lubrication beads that roll around the piston rod are connected to the upper and lower parts of the inner wall of the lubrication box. The lubrication beads all extend into the oil storage chamber.

[0007] An annular baffle is fixed inside the oil storage chamber, close to the lubricating beads. Two through holes are opened on the upper and lower parts of the side of the annular baffle, and an oil quantity adjustment component is provided outside the annular baffle.

[0008] The upper end of the lubrication box is fixed with a bushing that is sleeved around the piston rod. A sealing ring is provided between the bushing and the piston rod. The sealing ring is connected to the inner wall of the bushing. Semicircular rings are provided on both sides of the upper end of the bushing. Dustproof cotton that contacts the piston rod is connected to the inner wall of each semicircular ring.

[0009] Furthermore, an internally threaded oil inlet hole is provided on the outer side of the upper end of the lubrication box, and a threaded sealing plug is connected to the internal thread of the threaded oil inlet hole.

[0010] Furthermore, the oil quantity adjustment assembly includes a push-pull rod, a sealing cover, a concave push-pull plate, and a threaded adjustment rod. The push-pull rod is located on the outside of the annular partition. There are two sealing covers, one covering the opening of each of the two interconnected holes. The sealing covers are fixed to the push-pull rod.

[0011] Furthermore, the concave push-pull plate is fixed to the outside of the push-pull rod, and the concave push-pull plate slides through the lubrication box. A sealing ring is provided at the connection between the concave push-pull plate and the lubrication box. The threaded adjustment rod is rotatably connected to the outside of the lubrication box, and the threaded adjustment rod thread passes through the concave push-pull plate.

[0012] Furthermore, slots are provided on both the left and right sides of the upper end of the bushing, and inserts are inserted into each slot. The inserts are fixed to the lower end of the adjacent semicircular rings.

[0013] Furthermore, a threaded fixing hole is provided on one side of the insert block, and a threaded fixing rod is threadedly connected inside the threaded fixing hole, with the threaded fixing rod threaded through the bushing.

[0014] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0015] 1. By setting multiple lubricating beads around the piston rod, the piston rod moves up and down, causing the lubricating beads to roll. The lubricating beads come into contact with the lubricating oil, and then the lubricating beads spread the lubricating oil to the outer surface of the piston rod, thus achieving the effect of lubricating the piston rod. At the same time, the lubricating oil flows along the piston rod to the telescopic port of the cylinder, thereby facilitating effective lubrication of the piston rod and the telescopic port of the cylinder, effectively preventing severe wear at the connection between the piston rod and the telescopic port of the cylinder.

[0016] 2. By installing dustproof cotton, external dust is effectively blocked, and the sealing ring further blocks dust, thus effectively preventing external dust from causing significant frictional damping at the connection between the piston rod and the cylinder extension port. In summary, this makes the cylinder work more smoothly and effectively ensures the cylinder's high-pressure resistance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the lubrication box of this utility model;

[0019] Figure 3 This is a partially enlarged structural diagram of part A of the present invention;

[0020] Figure 4 This is a top view of the internal structure of the lubrication box of this utility model;

[0021] Figure 5 This is a top view schematic diagram of the semi-circular ring structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the overall external structure of this utility model.

[0023] Figure 1-6 In the middle: 1. Cylinder block; 2. Piston rod; 3. Lubrication box; 4. Oil reservoir; 5. Annular partition; 6. Lubrication bead; 7. Interconnection hole; 8. Sealing cover; 9. Push-pull rod; 10. Concave push-pull plate; 11. Threaded adjusting rod; 12. Bushing; 13. Semi-circular ring; 14. Threaded oil inlet hole; 15. Threaded sealing plug; 16. Slot; 17. Threaded fixing hole; 18. Threaded fixing rod; 19. Dustproof cotton; 20. Insert block; 21. Sealing ring. Detailed Implementation

[0024] A large high-pressure resistant hydraulic cylinder casting:

[0025] like Figure 1-4 As shown, in this embodiment, a cylinder body 1 and a piston rod 2 are included. The piston rod 2 extends slidably beyond the telescopic port of the cylinder body 1. A lubrication box 3 is fixed at the upper end of the cylinder body 1 and sleeved around the piston rod 2. An oil storage cavity 4 is opened inside the lubrication box 3, and several lubrication beads 6 are rolledly connected to the upper and lower parts of the inner wall of the lubrication box 3, which surround the piston rod 2. The lubrication beads 6 all extend into the oil storage cavity 4.

[0026] When the oil reservoir 4 is full of lubricating oil, multiple lubricating beads 6 are arranged around the piston rod 2. When the piston rod 2 moves up and down, the lubricating beads 6 will roll and come into contact with the lubricating oil. Then, the lubricating beads 6 will spread the lubricating oil to the outer surface of the piston rod 2, thus achieving the effect of lubricating the piston rod 2. At the same time, the lubricating oil will flow along the piston rod 2 to the telescopic port of the cylinder body 1, thereby facilitating the effective lubrication of the piston rod 2 and the telescopic port of the cylinder body 1. This effectively prevents severe wear at the connection between the piston rod 2 and the telescopic port of the cylinder body 1, making the cylinder work more smoothly and effectively ensuring the high pressure resistance of the cylinder.

[0027] like Figure 2-4As shown, in this embodiment, an annular partition 5 is fixed inside the oil storage cavity 4 near the lubricating bead 6. The upper and lower parts of the side of the annular partition 5 are each provided with two through holes 7. An oil volume adjustment assembly is provided outside the annular partition 5. The oil volume adjustment assembly includes a push-pull rod 9, a sealing cover 8, a concave push-pull plate 10, and a threaded adjustment rod 11. The push-pull rod 9 is located outside the annular partition 5. There are two sealing covers 8, which cover the openings of the two through holes 7. The sealing covers 8 are fixed to the push-pull rod 9. The concave push-pull plate 10 is fixed outside the push-pull rod 9 and slides through the lubrication box 3. A sealing ring is provided at the connection between the concave push-pull plate 10 and the lubrication box 3. The threaded adjustment rod 11 is rotatably connected to the outside of the lubrication box 3 and the threaded adjustment rod 11 passes through the concave push-pull plate 10.

[0028] When the oil storage chamber 4 inside the annular partition 5 is full of lubricating oil, the sealing cover 8 covers the interconnecting hole 7. At this time, only the lubricating oil inside the annular partition 5 will be consumed during the lubrication process. If the lubrication inside the annular partition 5 is insufficient and needs to be replenished, the threaded adjusting rod 11 is turned outward, which moves the concave push-pull plate 10, the push-pull rod 9 and the sealing cover 8 outward until the sealing cover 8 no longer covers the interconnecting hole 7. At this time, the lubricating oil outside the annular partition 5 will enter the inner part of the annular partition 5 through the interconnecting hole 7 to replenish the lubricating oil. After replenishment, the threaded adjusting rod 11 is turned outward again, which moves the concave push-pull plate 10, the push-pull rod 9 and the sealing cover 8 inward until the sealing cover 8 covers the interconnecting hole 7. This helps to avoid the overuse of lubricating oil in the oil storage chamber 4 and helps to save lubricating oil.

[0029] like Figure 3 As shown, in this embodiment, the upper outer side of the lubrication box 3 has an internally threaded oil inlet hole 14, and the internal thread of the oil inlet hole 14 is connected to a threaded sealing plug 15.

[0030] When it is necessary to add lubricating oil to the oil reservoir 4, unscrew the threaded sealing plug 15 out of the threaded oil inlet hole 14, and then add lubricating oil to the oil reservoir 4 through the open threaded oil inlet hole 14. Cover the threaded oil inlet hole 14 with the threaded sealing plug 15 to prevent lubricating oil leakage.

[0031] like Figure 2 , 3 As shown in Figure 5, in this embodiment, a bushing 12 is fixed at the upper end of the lubrication box 3 and sleeved around the piston rod 2. A sealing ring 21 is provided between the bushing 12 and the piston rod 2. The sealing ring 21 is connected to the inner wall of the bushing 12. Semicircular rings 13 are provided on both sides of the upper end of the bushing 12. Dustproof cotton 19 that contacts the piston rod 2 is connected to the inner wall of each semicircular ring 13.

[0032] By setting up the dustproof cotton 19, external dust is effectively blocked. The sealing ring 21 further blocks dust, thereby effectively preventing external dust from causing large frictional damping at the connection between the piston rod 2 and the telescopic port of the cylinder body 1. In summary, this makes the cylinder work more smoothly and effectively ensures the high pressure resistance of the cylinder.

[0033] like Figure 2 , 3 As shown in Figure 5, in this embodiment, slots 16 are opened on both the left and right sides of the upper end of the bushing 12, and inserts 20 are inserted into each slot 16. The inserts 20 are fixed to the lower end of the adjacent semicircular rings 13. A threaded fixing hole 17 is opened on one side of the insert 20, and a threaded fixing rod 18 is threadedly connected in the threaded fixing hole 17. The threaded fixing rod 18 is threaded through the bushing 12.

[0034] By setting two semicircular rings 13, and since the insert block 20 is inserted into the slot 16, and the threaded fixing rod 18 is threadedly fixed to the threaded fixing hole 17 on the insert block 20, it is beneficial to ensure the firmness of the installation of the semicircular ring 13 and the dustproof cotton 19. When the dustproof cotton 19 needs to be replaced, the threaded fixing rod 18 is unscrewed out of the threaded fixing hole 17, and then the insert block 20 is moved out of the slot 16, so that the semicircular ring 13 and the dustproof cotton 19 can be easily disassembled and replaced.

Claims

1. A large high-pressure resistant oil cylinder casting, comprising a cylinder body (1) and a piston rod (2) slidingly extending out of the upper end of a telescopic port of the cylinder body (1), characterized in that: a lubricating box (3) is fixed to the upper end of the cylinder body (1) and sleeved around the periphery of the piston rod (2), an oil storage cavity (4) is formed in the interior of the lubricating box (3), and a plurality of lubricating beads (6) are rollingly connected to the upper and lower portions of the inner wall of the lubricating box (3) and surround the periphery of the piston rod (2), wherein the lubricating beads (6) extend into the oil storage cavity (4); an annular partition plate (5) is fixed in the oil storage cavity (4) and close to the lubricating beads (6), two intercommunication holes (7) are formed in the upper and lower portions of the side surface of the annular partition plate (5), and an oil amount adjusting assembly is arranged outside the annular partition plate (5); a shaft sleeve (12) is fixed to the upper end of the lubricating box (3) and sleeved around the periphery of the piston rod (2), a sealing ring (21) is arranged between the shaft sleeve (12) and the piston rod (2), the sealing ring (21) is connected to the inner wall of the shaft sleeve (12), half circular rings (13) are arranged on the upper end of the shaft sleeve (12) on both sides, and dustproof cotton (19) is connected to the inner wall of the half circular rings (13) and contacts the piston rod (2). An internally threaded oil inlet hole (14) is formed in the outer side of the upper end of the lubricating box (3), and a threaded sealing plug (15) is threadedly connected in the internally threaded oil inlet hole (14). The oil amount adjusting assembly comprises a push-pull rod (9), sealing covers (8), a concave push-pull plate (10) and a threaded adjusting rod (11), the push-pull rod (9) is arranged outside the annular partition plate (5), the sealing covers (8) are arranged in pairs and cover the orifices of the two intercommunication holes (7), respectively, and the sealing covers (8) are fixed to the push-pull rod (9). The concave push-pull plate (10) is fixed outside the push-pull rod (9) and slidingly penetrates out of the lubricating box (3), a sealing rubber ring is arranged at the connection between the concave push-pull plate (10) and the lubricating box (3), and the threaded adjusting rod (11) is rotationally connected outside the lubricating box (3) and threadedly penetrates through the concave push-pull plate (10).

2. A large high pressure resistant oil cylinder casting according to claim 1, characterized in that: Insert slots (16) are formed in the left and right sides of the upper end of the shaft sleeve (12), insert blocks (20) are inserted into the insert slots (16), respectively, and the insert blocks (20) are fixed to the lower ends of the adjacent half circular rings (13).

3. The large high pressure resistant oil cylinder casting according to claim 1, characterized in that: A threaded fixing hole (17) is formed in one side of the insert block (20), a threaded fixing rod (18) is threadedly connected in the threaded fixing hole (17), and the threaded fixing rod (18) threadedly penetrates out of the shaft sleeve (12).

4. A large high pressure resistant oil cylinder casting according to claim 3, characterized in that: ​ 5. The large high pressure resistant oil cylinder casting according to claim 1, characterized in that: ​ 6. A large high pressure resistant oil cylinder casting according to claim 5, characterized in that: ​

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