Leak-proof device for hydraulic cylinder

Abstract

The utility model provides a kind of anti-leakage device for hydraulic cylinder, comprising: hydraulic cylinder main body and oil injection component, wherein, the oil injection component is arranged in the one side of the hydraulic cylinder main body, the oil injection component includes protective cover, pipeline mechanism and intercommunication mechanism, wherein, the protective cover is fixedly installed in the one side of the hydraulic cylinder main body, the pipeline mechanism is arranged in the inside of the protective cover, the inside of the pipeline mechanism is provided with filter screen, the intercommunication mechanism is arranged in the inside of the pipeline mechanism. The anti-leakage device for hydraulic cylinder of the utility model embodiment, by optimizing pipeline and intercommunication mechanism, reduce the use of oil injection pump and control valve, greatly simplify system structure, operation is more simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a leak-proof device for hydraulic cylinders. Background Technology

[0002] Internal leakage in hydraulic cylinders is often caused by impurities in the hydraulic fluid. Hard particles in the fluid can scratch the cylinder wall or wear down seals, creating gaps. Under high system pressure, fluid can leak from the high-pressure chamber into the low-pressure chamber through these gaps, causing internal leakage. This results in insufficient system pressure and reduced operating efficiency.

[0003] Existing hydraulic cylinders typically have a filter installed in the pipeline. The hydraulic oil must flow through the filter screen before entering the cylinder. Its core function is to intercept impurities, thereby effectively preventing internal leakage of the cylinder caused by the intrusion of particulate matter.

[0004] Current hydraulic cylinder leak prevention devices still have shortcomings. To prevent residual oil from stagnating in the pipeline, each oil filling chamber needs to be equipped with a discharge pipe and a control valve, and two oil filling pumps are required to fill the system through two separate oil filling pipes. This results in numerous pipelines, complex control mechanisms, inconvenient operation, and reduced efficiency. Utility Model Content

[0005] This utility model aims to at least partially solve one of the technical problems in the above-mentioned technologies.

[0006] Therefore, one objective of this utility model is to provide a leak-proof device for hydraulic cylinders, which reduces the use of oil pumps and control valves through optimized pipelines and connecting mechanisms, greatly simplifies the system structure, and makes operation simpler and faster.

[0007] To achieve the above objectives, the first aspect of this utility model provides a leak-proof device for a hydraulic cylinder, comprising: a hydraulic cylinder body and an oil injection assembly, wherein the oil injection assembly is disposed on one side of the hydraulic cylinder body, the oil injection assembly includes a protective cover, a pipeline mechanism and a connecting mechanism, wherein the protective cover is fixedly installed on one side of the hydraulic cylinder body, the pipeline mechanism is disposed inside the protective cover, a filter screen is disposed inside the pipeline mechanism, and the connecting mechanism is disposed inside the pipeline mechanism.

[0008] In addition, the anti-leakage device for hydraulic cylinders proposed above according to this utility model may also have the following additional technical features: Specifically, the hydraulic cylinder body includes a cylinder body, a splined shaft, a telescopic rod, and a sealing ring. The top and bottom of the cylinder body are respectively provided with a first oil filling chamber and a second oil filling chamber. The splined shaft is fixedly connected to the bottom end of the cylinder body. The telescopic rod is slidably connected to the cylinder body, and a slot is provided at the bottom of the telescopic rod for sliding connection with the splined shaft. A piston plate is fixedly connected to the outer side of the bottom end of the telescopic rod, and the sealing ring is fixedly connected to the outer side of the piston plate.

[0009] Specifically, the pipeline system includes a first oil injection pipe, a second oil injection pipe, and a multi-port pipe. The first oil injection pipe is fixedly connected to the outside of the first oil injection chamber, the second oil injection pipe is fixedly connected to the outside of the second oil injection chamber, and filter screens are fixedly installed on the inner sides of the first oil injection pipe and the second oil injection pipe, respectively. The multi-port pipe is fixedly connected between the first oil injection pipe and the second oil injection pipe.

[0010] Specifically, the multi-port pipe includes a first inlet pipe, a second inlet pipe, a first outlet pipe, and a second outlet pipe, wherein the first inlet pipe and the first outlet pipe are respectively fixedly connected to one end of the first oil injection pipe, and the second inlet pipe and the second outlet pipe are respectively fixedly connected to one end of the second oil injection pipe.

[0011] Specifically, the communication mechanism includes a first slide rod, a second slide rod, and a driving mechanism. The first slide rod is slidably connected to the inner sides of the first feed pipe and the second feed pipe, and a first sealing cap is fixedly connected to each end of the first slide rod. A first sealing ring is fixedly connected to the inner sides of the first feed pipe and the second feed pipe. The second slide rod is slidably connected to the inner sides of the first discharge pipe and the second discharge pipe, and a second sealing cap is fixedly connected to each end of the second slide rod. A second sealing ring is fixedly connected to the inner sides of the first discharge pipe and the second discharge pipe. The driving mechanism is located inside the protective cover and is connected to the first slide rod and the second slide rod.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention, through the cooperation of multi-port pipe and linkage connection mechanism, reduces the use of oil pump and control valve, while realizing independent oil injection and discharge of dual oil tanks, significantly simplifying pipeline structure and control unit, and effectively improving the system's leak prevention performance and reliability while optimizing operation convenience.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic diagram of the structure of a leak-proof device for a hydraulic cylinder according to an embodiment of the present invention.

[0015] Figure 2 This is a cross-sectional schematic diagram of a leak-proof device for a hydraulic cylinder according to an embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the pipeline mechanism of a leak-proof device for a hydraulic cylinder according to an embodiment of the present invention.

[0017] Figure 4 This is a cross-sectional view of the pipeline structure of a leak-proof device for a hydraulic cylinder according to an embodiment of the present invention. Figure 1 .

[0018] Figure 5 This is a cross-sectional view of the pipeline structure of a leak-proof device for a hydraulic cylinder according to an embodiment of the present invention. Figure 2 .

[0019] Figure 6 This is a schematic diagram of the oil flow direction in the second oil filling chamber of a hydraulic cylinder anti-leakage device according to an embodiment of the present invention.

[0020] Figure 7 This is a schematic diagram of the oil flow direction in the first oil filling chamber of a hydraulic cylinder anti-leakage device according to an embodiment of the present invention.

[0021] Reference numerals: 1. Hydraulic cylinder body; 11. Cylinder body; 12. First oil filling chamber; 13. Second oil filling chamber; 14. Splined shaft; 15. Telescopic rod; 16. Sealing ring; 2. Oil injection assembly; 21. Protective cover; 22. Piping system; 23. Connecting mechanism; 221. First oil injection pipe; 222. Second oil injection pipe; 223. Multi-port pipe; 2231, First feed pipe; 2232, Second feed pipe; 2233, First discharge pipe; 2234, Second discharge pipe; 231. First slide rod; 232. First sealing cover; 233. First sealing ring; 234. Second slide rod; 235. Second sealing cover; 236. Second sealing ring; 237. Drive mechanism. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0023] The following describes an embodiment of the anti-leakage device for a hydraulic cylinder with reference to the accompanying drawings.

[0024] like Figures 1-7 As shown in the figure, a leakage prevention device for a hydraulic cylinder according to an embodiment of the present invention includes: a hydraulic cylinder body 1 and an oil injection assembly 2.

[0025] The hydraulic cylinder body 1 includes a cylinder body 11, a splined shaft 14, a telescopic rod 15, and a sealing ring 16.

[0026] The cylinder body 11 has a first oil filling chamber 12 and a second oil filling chamber 13 at the top and bottom of the inner side, respectively. The spline shaft 14 is fixedly connected to the bottom of the inner side of the cylinder body 11. The telescopic rod 15 is slidably connected to the inner side of the cylinder body 11, and the bottom of the telescopic rod 15 has a slot for sliding connection with the spline shaft 14. The piston plate is fixedly connected to the outer side of the bottom end of the telescopic rod 15, and the sealing ring 16 is fixedly connected to the outer side of the piston plate.

[0027] The oil injection assembly 2 is located on one side of the hydraulic cylinder body 1. The oil injection assembly 2 includes a protective cover 21, a pipeline mechanism 22, and a connecting mechanism 23.

[0028] The protective cover 21 is fixedly installed on one side of the hydraulic cylinder body 1, the pipeline mechanism 22 is located inside the protective cover 21, a filter screen is provided inside the pipeline mechanism 22, and the connecting mechanism 23 is located inside the pipeline mechanism 22.

[0029] The pipeline structure 22 includes a first oil injection pipe 221, a second oil injection pipe 222, and a multi-port pipe 223.

[0030] The first oil injection pipe 221 is fixedly connected to the outside of the first oil injection chamber 12, the second oil injection pipe 222 is fixedly connected to the outside of the second oil injection chamber 13, filter screens are fixedly installed on the inner sides of the first oil injection pipe 221 and the second oil injection pipe 222 respectively, and the multi-port pipe 223 is fixedly connected between the first oil injection pipe 221 and the second oil injection pipe 222.

[0031] The multi-port pipe 223 includes a first feed pipe 2231, a second feed pipe 2232, a first discharge pipe 2233, and a second discharge pipe 2234.

[0032] The first feed pipe 2231 and the first discharge pipe 2233 are respectively fixedly connected to one end of the first oil injection pipe 221, and the second feed pipe 2232 and the second discharge pipe 2234 are respectively fixedly connected to one end of the second oil injection pipe 222.

[0033] It should be noted that in this embodiment, the first feed pipe 2231 and the second feed pipe 2232 are connected by a first tee pipe, which is connected to an external oil injection pump, simplifying the use of the oil injection pump. The first discharge pipe 2233 and the second discharge pipe 2234 are connected by a second tee pipe, and a control valve is installed in the outlet of the second tee pipe, simplifying the use of the control device and improving the speed of operation.

[0034] The connecting mechanism 23 includes a first slide bar 231, a second slide bar 234, and a driving mechanism 237.

[0035] The first slide rod 231 is slidably connected to the inner side of the first feed pipe 2231 and the second feed pipe 2232, and the first sealing cap 232 is fixedly connected to both ends of the first slide rod 231. The first sealing ring 233 is fixedly connected to the inner side of the first feed pipe 2231 and the second feed pipe 2232, respectively. The second slide rod 234 is slidably connected to the inner side of the first discharge pipe 2233 and the second discharge pipe 2234, and the second sealing cap 235 is fixedly connected to both ends of the second slide rod 234. The second sealing ring 236 is fixedly connected to the inner side of the first discharge pipe 2233 and the second discharge pipe 2234, respectively. The drive mechanism 237 is located inside the protective cover 21 and is connected to the first slide rod 231 and the second slide rod 234, respectively.

[0036] It should be noted that in this embodiment, the two first sealing rings 233 are specifically connected to the side of the first feed pipe 2231 connecting to the first tee pipe near the first oil injection pipe 221, and the side of the second feed pipe 2232 connecting to the first tee pipe near the second oil injection pipe 222. When the corresponding first sealing ring 233 is closed, the corresponding branch of the first tee pipe is disconnected. The two second sealing rings 236 are specifically connected to the side of the first discharge pipe 2233 connecting to the second tee pipe near the first oil injection pipe 221, and the side of the second discharge pipe 2234 connecting to the second tee pipe near the second oil injection pipe 222. When the corresponding second sealing ring 236 is closed, the corresponding branch of the first tee pipe is disconnected, effectively controlling the connection of the oil circuit.

[0037] Specifically, the driving component in this embodiment includes a motor and a gear. The motor is fixedly installed inside the protective cover 21, and the gear is fixedly connected to the outside of the motor drive shaft. The first slide rod 231 and the second slide rod 234 are respectively provided with tooth grooves that mesh with the gear on the side near the gear. When the gear rotates, the first slide rod 231 and the second slide rod 234 can be driven to move in different directions synchronously.

[0038] It should be noted that the first slide rod 231 and the second slide rod 234 in this embodiment are also provided with a limiting structure. Multiple connecting rods are fixedly installed on the side of the first slide rod 231 and the second slide rod 234 near the cylinder body 11, and slide rails are fixedly installed on the outside of the cylinder body 11. The corresponding connecting rods slide in the slide rails, which effectively prevents the first slide rod 231 and the second slide rod 234 from rotating when sliding, and improves the stability during adjustment.

[0039] Specifically, when technicians need to adjust the extension of the telescopic rod 15, they first need to start the motor so that the gears drive the first slide rod 231 and the second slide rod 234 to move respectively. The movement of the first slide rod 231 causes the first sealing ring 233 in the second feed pipe 2232 to separate from the corresponding first sealing cover 232, and the first sealing ring 233 in the first feed pipe 2231 is connected and sealed with the corresponding first sealing cover 232. The movement of the second slide rod 234 causes the second sealing ring 236 in the second discharge pipe 2234 to connect and seal with the corresponding second sealing cover 235, and the second sealing ring 236 in the first discharge pipe 2233 is separated from the corresponding second sealing cover 235.

[0040] During this adjustment process, both the oil pump and the control valve are closed to prevent changes in the pressure in the pipeline.

[0041] Afterwards, the technicians start the oil injection pump and inject hydraulic oil into the second inlet pipe 2232 through the first three-way pipe. After being filtered, the hydraulic oil enters the second oil injection chamber 13. At the same time, the control valve is opened, which opens the second three-way pipe. The hydraulic oil in the first oil injection chamber 12 is discharged through the first discharge pipe 2233 and the second three-way pipe. During this process, the hydraulic oil backwashes the filter screen and discharges the hydraulic oil containing impurities through the control valve, thereby extending the telescopic rod 15. After reaching the required extension length, the oil injection pump and control valve are locked to keep the pressure in the first oil injection chamber 12 and the second oil injection chamber 13 stable.

[0042] Specifically, when technicians need to adjust the retraction of the telescopic rod 15, they first need to start the motor, so that the gears drive the first slide rod 231 and the second slide rod 234 to move respectively. The movement of the first slide rod 231 causes the first sealing ring 233 in the second feed pipe 2232 to connect and close with the corresponding first sealing cover 232, and the first sealing ring 233 in the first feed pipe 2231 to separate from the corresponding first sealing cover 232. The movement of the second slide rod 234 causes the second sealing ring 236 in the second discharge pipe 2234 to separate from the corresponding second sealing cover 235, and the second sealing ring 236 in the first discharge pipe 2233 to connect and close with the corresponding second sealing cover 235.

[0043] During this adjustment process, both the oil pump and the control valve are closed to prevent changes in the pressure in the pipeline.

[0044] Afterwards, the technicians start the oil injection pump and inject hydraulic oil into the first feed pipe 2231 through the first three-way pipe. After being filtered, the hydraulic oil enters the first oil injection chamber 12. At the same time, the control valve is opened, which opens the second three-way pipe. The hydraulic oil in the second oil injection chamber 13 is discharged through the second discharge pipe 2234 and the second three-way pipe. During this process, the hydraulic oil backwashes the filter screen and discharges the hydraulic oil containing impurities through the control valve, thereby extending the telescopic rod 15. After reaching the required retracted length, the oil injection pump and control valve are locked to keep the pressure in the first oil injection chamber 12 and the second oil injection chamber 13 stable.

[0045] In summary, the anti-leakage device for hydraulic cylinders of this utility model controls the oil circuit of the dual oil tanks in coordination with the multi-port pipe 223 and the linkage slide rod structure. It can realize the extension and retraction adjustment of the telescopic rod 15 and the directional discharge of impurity oil by using only a single oil injection pump and control valve. While achieving backwashing and filtration, it significantly simplifies the pipeline layout and operation process, and improves the anti-leakage performance and overall operational stability.

[0046] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A leak-proof device for hydraulic cylinders, characterized in that, include: The hydraulic cylinder body and the oil injection assembly, among which, The oil injection assembly is located on one side of the hydraulic cylinder body; The oil injection assembly includes a protective cover, a piping system, and a connecting mechanism, wherein, The protective cover is fixedly installed on one side of the hydraulic cylinder body; The pipeline mechanism is located inside the protective cover, and a filter screen is provided inside the pipeline mechanism; The connecting mechanism is located inside the pipeline structure.

2. The anti-leakage device for hydraulic cylinders according to claim 1, characterized in that, The hydraulic cylinder body includes a cylinder body, a splined shaft, a telescopic rod, and a sealing ring, wherein, The cylinder body has a first oil filling chamber at the top and a second oil filling chamber at the bottom. The splined shaft is fixedly connected to the bottom side of the cylinder body; The telescopic rod is slidably connected to the inside of the cylinder body, and a slot is provided at the bottom of the telescopic rod for slidably connecting with the spline shaft; A piston plate is fixedly connected to the outer side of the bottom end of the telescopic rod, and the sealing ring is fixedly connected to the outer side of the piston plate.

3. The anti-leakage device for hydraulic cylinders according to claim 2, characterized in that, The piping system includes a first oil injection pipe, a second oil injection pipe, and a multi-port pipe, wherein, The first oil injection pipe is fixedly connected to the outside of the first oil injection chamber; The second oil injection pipe is fixedly connected to the outside of the second oil injection chamber; Filter screens are fixedly installed on the inner sides of the first oil injection pipe and the second oil injection pipe respectively; The multi-port pipe is fixedly connected between the first oil injection pipe and the second oil injection pipe.

4. The anti-leakage device for hydraulic cylinders according to claim 3, characterized in that, The multi-channel pipe includes a first inlet pipe, a second inlet pipe, a first outlet pipe, and a second outlet pipe, wherein... The first feed pipe and the first discharge pipe are respectively fixedly connected to one end of the first oil injection pipe; The second feed pipe and the second discharge pipe are respectively fixedly connected to one end of the second oil injection pipe.

5. The anti-leakage device for hydraulic cylinders according to claim 4, characterized in that, The connecting mechanism includes a first slide bar, a second slide bar, and a driving mechanism, wherein, The first slide rod is slidably connected to the inner side of the first feed pipe and the second feed pipe, and the two ends of the first slide rod are respectively fixedly connected with the first sealing cap, and the inner side of the first feed pipe and the second feed pipe are respectively fixedly connected with the first sealing ring; The second slide rod is slidably connected to the inner side of the first discharge pipe and the second discharge pipe, and the two ends of the second slide rod are respectively fixedly connected with second sealing caps, and the inner sides of the first discharge pipe and the second discharge pipe are respectively fixedly connected with second sealing rings; The drive mechanism is located inside the protective cover, and the drive mechanism is connected to the first slide rod and the second slide rod respectively.

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