Leakage-proof structure of hydraulic oil cylinder

Abstract

The utility model discloses a leak-proof structure of a hydraulic oil cylinder, which belongs to the technical field of hydraulic oil cylinders, and comprises a cylinder body, the bottom of the cylinder body is fixedly connected with a cover plate, the inside of the cover plate is movably connected with a piston rod, and the top of the piston rod extends into the cylinder body and is fixedly connected with a buffer component. The surface of the cylinder body is fixedly connected with a protection assembly, the protection assembly comprises a reinforcing pipe, and the interior of the reinforcing pipe is fixedly connected with a rubber buffer layer, so that the problems that an existing hydraulic oil cylinder anti-leakage structure is poor in buffering effect, and in the actual use process, due to the lack of an effective buffering effect, the buffering effect is poor are solved. The problems that impact force generated when the hydraulic oil cylinder falls cannot be effectively dispersed due to the fact that the hydraulic oil cylinder falls down, a cylinder body is prone to being broken in the long-time using process, hydraulic oil leaks, normal use of the hydraulic oil cylinder is affected, working efficiency is affected, maintenance cost is increased, and practicability of the device is reduced are solved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a hydraulic cylinder anti-leakage structure. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating 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. A hydraulic cylinder basically consists of a cylinder barrel and cylinder head, a piston and piston rod, a sealing device, a buffer device, and an exhaust device. The buffer device and exhaust device are determined according to the specific application, while the other devices are essential.

[0003] Existing hydraulic cylinders achieve linear motion by reciprocating the piston body inside the cylinder. The sealing structure is relatively simple. Over time, wear will occur between the piston body and the cylinder, resulting in oil leakage. This reduces the sealing between the piston body and the cylinder, causing hydraulic oil to flow on both sides of the piston body. This reduces the accuracy of the piston body's extension and retraction, reduces the performance of the hydraulic cylinder, and fails to meet the usage requirements.

[0004] An existing patent (publication number: CN221374121U) discloses a leak-proof structure for hydraulic cylinders. By setting up a multi-layer mechanical seal structure, the overall sealing performance of the hydraulic cylinder is improved. The piston body is provided with balls on the outside. The balls contact the inner wall of the cylinder body, which can reduce the resistance of the piston body in the cylinder, reduce wear, avoid hydraulic oil leakage, prevent hydraulic oil from flowing on both sides of the piston body, and improve the performance of the hydraulic cylinder.

[0005] Existing patents offer solutions to the above problems, but their buffering effect is poor. In actual use, due to the lack of effective buffering, the impact force generated when the hydraulic cylinder falls cannot be effectively dispersed. Over a long period of use, the cylinder body is prone to breakage, which in turn causes hydraulic oil leakage, affecting the normal use of the hydraulic cylinder. This not only affects work efficiency but also increases maintenance costs and reduces the practicality of the device.

[0006] Therefore, a leak-proof structure for hydraulic cylinders is proposed. Utility Model Content

[0007] The purpose of this utility model is to provide a hydraulic cylinder anti-leakage structure, which can solve the problem that the existing hydraulic cylinder anti-leakage structure has poor buffering effect. In actual use, due to the lack of effective buffering effect, it is impossible to effectively disperse the impact force generated when the hydraulic cylinder falls. During long-term use, the cylinder body is prone to breakage, which leads to hydraulic oil leakage, affecting the normal use of the hydraulic cylinder, not only affecting work efficiency, but also increasing maintenance costs and reducing the practicality of the device.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic cylinder anti-leakage structure, including a cylinder body, a cover plate fixedly connected to the bottom of the cylinder body, and a piston rod movably connected inside the cover plate, the top of the piston rod extending into the interior of the cylinder body and fixedly connected to a buffer assembly, and a protective assembly fixedly connected to the surface of the cylinder body, the protective assembly including a reinforcing tube, a rubber buffer layer fixedly connected inside the reinforcing tube, and the rubber buffer layer in close contact with the surface of the cylinder body;

[0009] The buffer assembly includes a movable circular block, with connecting grooves at each of the four corners of the movable circular block, and movable wheels rotatably connected inside the connecting grooves. A circular ring block is movably connected to the bottom inside the movable circular block, and several buffers are fixedly connected to the top of the circular ring block. The bottom of the movable circular block is fixedly connected to the top of the piston rod, and the circular ring block is fitted onto the surface of the piston rod.

[0010] Preferably, a storage box is fixedly connected to the front side of the reinforcing tube, and a connecting tube is fixedly connected inside the storage box. The top of the connecting tube extends to the top of the storage box and is fixedly connected to an infusion pump. The side of the infusion pump away from the connecting tube extends into the interior of the cylinder.

[0011] Preferably, a pressure sensor is fixedly connected to the top of the storage tank, and the pressure sensor is electrically connected to the infusion pump.

[0012] Preferably, an observation glass is embedded inside the front side of the storage box, and a discharge valve is fixedly connected to the right side of the bottom of the storage box.

[0013] Preferably, the bottom of the movable circular block is provided with a fixing groove for use with the annular block, and the side of the buffer away from the annular block is fixedly connected to the top of the inner wall of the fixing groove.

[0014] Preferably, each of the four corners of the inner wall of the cylinder is provided with a moving groove for use with the moving wheel, and the surface of the moving wheel is in contact with the inner wall of the moving groove.

[0015] Preferably, an oil inlet valve is fixedly connected to the top of the right side of the cylinder body, and an oil outlet valve is fixedly connected to the bottom of the right side of the cylinder body.

[0016] Preferably, the bottom of the cover plate has a connecting hole for use with the piston rod, and the surface of the piston rod is in contact with the inner wall of the connecting hole.

[0017] Preferably, a rubber annular block is fixedly connected to the top of the cover plate, and the surface of the rubber annular block is in contact with the inner wall of the cylinder.

[0018] Preferably, the bottom of the cover plate is threaded with several bolts, and the bolts extend into the interior of the cylinder body from the side closest to the cylinder body.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. By setting up protective components, this application can protect the cylinder body and adjust the internal pressure of the cylinder body, ensuring the safe use of the hydraulic cylinder and improving the safety of the device.

[0021] 2. By setting up a buffer component, this application enables the piston rod to move more smoothly, reduces the wear of the piston rod on the cylinder body, and can also buffer the impact force when the piston rod falls, avoiding damage to the cylinder body due to the impact force of the fall, ensuring the normal use of the device and improving the practicality of the device. Attached Figure Description

[0022] Figure 1 This is an overall structural diagram of the anti-leakage structure for the hydraulic cylinder of this utility model;

[0023] Figure 2 This is a side view of the anti-leakage structure of the hydraulic cylinder of this utility model;

[0024] Figure 3 This is a schematic diagram showing the connection between the cylinder body and the cover plate of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the protective component of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the buffer component of this utility model.

[0027] In the diagram, 1. Cylinder body; 2. Cover plate; 3. Piston rod; 4. Buffer assembly; 401. Moving circular block; 402. Connecting groove; 403. Moving wheel; 404. Circular block; 405. Buffer; 5. Protective assembly; 501. Reinforcing pipe; 502. Rubber buffer layer; 503. Storage tank; 504. Connecting pipe; 505. Infusion pump; 6. Pressure sensor; 7. Observation glass; 8. Discharge valve; 9. Fixed groove; 10. Moving groove; 11. Oil inlet valve; 12. Oil outlet valve; 13. Connecting hole; 14. Rubber annular block; 15. Bolt. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-5 The present invention provides the following technical solution:

[0030] A hydraulic cylinder anti-leakage structure includes a cylinder body 1, a cover plate 2 fixedly connected to the bottom of the cylinder body 1, and a piston rod 3 movably connected inside the cover plate 2. The top of the piston rod 3 extends into the interior of the cylinder body 1 and is fixedly connected to a buffer assembly 4. A protective assembly 5 is fixedly connected to the surface of the cylinder body 1. The protective assembly 5 includes a reinforcing tube 501, and a rubber buffer layer 502 is fixedly connected inside the reinforcing tube 501. The rubber buffer layer 502 is in close contact with the surface of the cylinder body 1.

[0031] The buffer assembly 4 includes a movable circular block 401. Each of the four corners of the movable circular block 401 is provided with a connecting groove 402, and a movable wheel 403 is rotatably connected inside the connecting groove 402. A circular ring block 404 is movably connected to the bottom inside the movable circular block 401, and several buffers 405 are fixedly connected to the top of the circular ring block 404. The bottom of the movable circular block 401 is fixedly connected to the top of the piston rod 3, and the circular ring block 404 is sleeved on the surface of the piston rod 3.

[0032] In this embodiment: the cooperation between the movable wheel 403 and the connecting groove 402 allows the movable wheel 403 to move smoothly under the constraint of the connecting groove 402, driving the movable block 401 to move smoothly on the inner wall of the cylinder 1, and simultaneously driving the piston rod 3 to move. This makes the piston rod 3 move more smoothly, effectively reducing the wear of the piston rod 3 on the cylinder 1, thereby ensuring the normal use of the hydraulic cylinder and improving the service life of the device. Under the action of the buffer 405, it generates a reaction force, driving the ring block 404 to move smoothly, which can buffer the impact force when the piston rod 3 falls, avoiding damage to the cylinder 1 due to the impact force of the fall, ensuring the normal use of the device, and improving the ease of use of the buffer component 4. Then, under the action of the reinforcing tube 501, not only can the cylinder 1 be reinforced, but external impact forces can also be prevented from damaging the cylinder 1. At the same time, under the action of the rubber buffer layer 502, not only can external impact forces be buffered, but the vibration generated during the movement of the piston rod 3 can also be absorbed and dispersed, ensuring the safe use of the device and improving the ease of use of the protective component 5.

[0033] Specifically, such as Figure 4As shown, a storage tank 503 is fixedly connected to the front side of the reinforcing tube 501, and a connecting tube 504 is fixedly connected inside the storage tank 503. The top of the connecting tube 504 extends to the top of the storage tank 503 and is fixedly connected to an infusion pump 505. The side of the infusion pump 505 away from the connecting tube 504 extends into the interior of the cylinder 1.

[0034] Specifically, such as Figure 1 , Figure 2 As shown, a pressure sensor 6 is fixedly connected to the top of the storage tank 503, and the pressure sensor 6 is electrically connected to the infusion pump 505.

[0035] Specifically, such as Figure 1 , Figure 2 , Figure 4 As shown, an observation glass 7 is embedded inside the front side of the storage box 503, and a discharge valve 8 is fixedly connected to the right side of the bottom of the storage box 503.

[0036] In this embodiment: the pressure sensor 6 can detect the internal condition of the cylinder 1 and provide corresponding data support for the infusion pump 505. At the same time, through the cooperation of the infusion pump 505 and the connecting pipe 504, the hydraulic oil inside the storage tank 503 can flow into the cylinder 1, which can accurately adjust the pressure inside the cylinder 1, ensuring that the cylinder 1 is always at a suitable pressure, avoiding damage to the cylinder 1 due to excessive pressure, and improving the practicality of the device. Then, through the cooperation of the observation glass 7 and the discharge valve 8, not only can the condition of the hydraulic oil inside the storage tank 503 be observed, but the hydraulic oil inside the storage tank 503 can also be replaced, ensuring the normal use of the device and improving the ease of use of the device.

[0037] Specifically, such as Figure 5 As shown, the bottom of the movable circular block 401 is provided with a fixing groove 9 for use with the annular block 404, and the side of the buffer 405 away from the annular block 404 is fixedly connected to the top of the inner wall of the fixing groove 9.

[0038] Specifically, such as Figure 2 , Figure 3 As shown, each of the four corners of the inner wall of the cylinder 1 is provided with a moving groove 10 for use with the moving wheel 403, and the surface of the moving wheel 403 is in contact with the inner wall of the moving groove 10.

[0039] In this embodiment: the movable groove 10 and the movable wheel 403 work together to make the movable wheel 403 move smoothly under the restriction of the movable groove 10, and simultaneously drive the piston rod 3 to move smoothly. This can reduce the wear of the piston rod 3 on the cylinder 1. At the same time, under the action of the buffer 405, it generates a reaction force, which drives the ring block 404 to return to its original position smoothly under the restriction of the fixed groove 9. This can buffer the impact force generated when the piston rod 3 falls, avoid damage to the cylinder 1 due to the impact force of the fall, ensure the normal use of the device, and improve the convenience of using the buffer assembly 4.

[0040] Specifically, such as Figure 1 , Figure 2 As shown, an oil inlet valve 11 is fixedly connected to the top right side of cylinder 1, and an oil outlet valve 12 is fixedly connected to the bottom right side of cylinder 1.

[0041] Specifically, such as Figure 3 As shown, the bottom of the cover plate 2 is provided with a connecting hole 13 for use with the piston rod 3, and the surface of the piston rod 3 is in contact with the inner wall of the connecting hole 13.

[0042] Specifically, such as Figure 2 , Figure 3 As shown, a rubber ring block 14 is fixedly connected to the top of the cover plate 2, and the surface of the rubber ring block 14 is in contact with the inner wall of the cylinder 1.

[0043] Specifically, such as Figure 2 , Figure 3 As shown, the bottom of the cover plate 2 is threaded with several bolts 15, and the bolts 15 extend into the interior of the cylinder 1 from the side near the cylinder 1.

[0044] In this embodiment: the use of bolt 15 and cover plate 2 to thread the bolt 15 through cover plate 2 and cylinder body 1 makes the connection between cover plate 2 and cylinder body 1 more secure. At the same time, under the action of rubber ring block 14, not only can cylinder body 1 be sealed to prevent hydraulic oil leakage, but also some impact force can be absorbed and dispersed to ensure the normal use of hydraulic cylinder and improve the safety of the device. Then, the use of inlet valve 11 and outlet valve 12 can effectively and precisely control the inflow and outflow of hydraulic oil in cylinder body 1 to ensure the normal operation of hydraulic cylinder oil circuit system. At the same time, the use of piston rod 3 and connecting hole 13 allows piston rod 3 to move smoothly under the restriction of connecting hole 13, ensuring the working performance and stability of the entire hydraulic cylinder and improving the stability of the device.

[0045] Working Principle: When using the hydraulic cylinder, the bolt 15 and cover plate 2 work together to make the connection between cover plate 2 and cylinder body 1 more secure. Simultaneously, the rubber ring block 14 not only seals the cylinder body 1, preventing hydraulic oil leakage, but also absorbs and disperses some impact force. Then, the inlet valve 11 and outlet valve 12 work together to effectively and precisely control the inflow and outflow of hydraulic oil within the cylinder body 1. Furthermore, the pressure sensor 6 detects the internal condition of the cylinder body 1 and provides corresponding data support to the infusion pump 505. This allows the infusion pump 505 to drive the hydraulic oil from the storage tank 503 into the cylinder body 1 through the connecting pipe 504, precisely regulating the internal pressure of the cylinder body 1 and preventing cylinder leakage. The cylinder body 1 is damaged due to excessive pressure. At the same time, the use of the reinforcing tube 501 and the rubber buffer layer 502 not only reinforces the cylinder body 1, but also absorbs and disperses the impact force generated during the movement of the piston rod 3, ensuring the normal use of the hydraulic cylinder. Finally, the use of the moving groove 10 and the moving wheel 403 allows the moving wheel 403 to move smoothly under the restriction of the moving groove 10, and synchronously drives the piston rod 3 to move smoothly, which can reduce the wear of the piston rod 3 on the cylinder body 1. At the same time, under the action of the buffer 405, it generates a reaction force, which drives the ring block 404 to return to its original position smoothly under the restriction of the fixed groove 9, which can buffer the impact force generated when the piston rod 3 falls, and prevent the cylinder body 1 from being damaged by the impact force of falling.

[0046] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic cylinder anti-leakage structure, comprising a cylinder body (1), characterized in that: The bottom of the cylinder (1) is fixedly connected to a cover plate (2), and a piston rod (3) is movably connected inside the cover plate (2). The top of the piston rod (3) extends into the inside of the cylinder (1) and is fixedly connected to a buffer assembly (4). A protective assembly (5) is fixedly connected to the surface of the cylinder (1). The protective assembly (5) includes a reinforcing tube (501). A rubber buffer layer (502) is fixedly connected inside the reinforcing tube (501), and the rubber buffer layer (502) is in close contact with the surface of the cylinder (1). The buffer assembly (4) includes a movable circular block (401), with connecting grooves (402) at each of the four corners of the movable circular block (401), and a movable wheel (403) rotatably connected inside the connecting groove (402). A circular ring block (404) is movably connected to the bottom inside the movable circular block (401), and several buffers (405) are fixedly connected to the top of the circular ring block (404). The bottom of the movable circular block (401) is fixedly connected to the top of the piston rod (3), and the circular ring block (404) is sleeved on the surface of the piston rod (3).

2. The anti-leakage structure for a hydraulic cylinder according to claim 1, characterized in that: The front side of the reinforcing tube (501) is fixedly connected to a storage box (503), and the inside of the storage box (503) is fixedly connected to a connecting tube (504). The top of the connecting tube (504) extends to the top of the storage box (503) and is fixedly connected to an infusion pump (505). The side of the infusion pump (505) away from the connecting tube (504) extends into the inside of the cylinder (1).

3. The anti-leakage structure for a hydraulic cylinder according to claim 2, characterized in that: A pressure sensor (6) is fixedly connected to the top of the storage tank (503), and the pressure sensor (6) is electrically connected to the infusion pump (505).

4. The anti-leakage structure for a hydraulic cylinder according to claim 2, characterized in that: An observation glass (7) is embedded inside the front side of the storage box (503), and a discharge valve (8) is fixedly connected to the right side of the bottom of the storage box (503).

5. The anti-leakage structure for a hydraulic cylinder according to claim 1, characterized in that: The bottom of the movable circular block (401) is provided with a fixing groove (9) for use with the circular ring block (404), and the side of the buffer (405) away from the circular ring block (404) is fixedly connected to the top of the inner wall of the fixing groove (9).

6. The anti-leakage structure for a hydraulic cylinder according to claim 1, characterized in that: The cylinder body (1) has four corners with moving grooves (10) for use with moving wheels (403), and the surface of the moving wheels (403) is in contact with the inner wall of the moving grooves (10).

7. The anti-leakage structure for a hydraulic cylinder according to claim 1, characterized in that: An oil inlet valve (11) is fixedly connected to the top right side of the cylinder body (1), and an oil outlet valve (12) is fixedly connected to the bottom right side of the cylinder body (1).

8. The anti-leakage structure for a hydraulic cylinder according to claim 1, characterized in that: The bottom of the cover plate (2) is provided with a connecting hole (13) for use with the piston rod (3), and the surface of the piston rod (3) is in contact with the inner wall of the connecting hole (13).

9. The anti-leakage structure for a hydraulic cylinder according to claim 1, characterized in that: A rubber ring block (14) is fixedly connected to the top of the cover plate (2), and the surface of the rubber ring block (14) is in contact with the inner wall of the cylinder (1).

10. A hydraulic cylinder anti-leakage structure according to claim 1, characterized in that: The bottom of the cover plate (2) is threaded with several bolts (15), and the bolts (15) extend into the interior of the cylinder (1) on the side near the cylinder (1).

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