A dustproof sealing device for a hydraulic cylinder piston rod

Abstract

The utility model discloses a hydraulic oil cylinder piston rod dustproof sealing device relates to sealing device technical field, including two fixed plate no.

Description

Technical Field

[0001] This utility model relates to the field of sealing device technology, specifically to a dustproof sealing device for a hydraulic cylinder piston rod. Background Technology

[0002] During the operation of a hydraulic cylinder, the piston rod, as a key moving component, has its extended end directly exposed to the external environment, making it susceptible to contaminants such as dust, mud, moisture, and metal shavings. If these contaminants enter the cylinder, they will accelerate the wear of the seals, scratch the piston rod surface, and contaminate the hydraulic oil, ultimately leading to cylinder leakage, malfunction, or even scrapping. The core function of the hydraulic cylinder piston rod dustproof sealing device is to remove contaminants adhering to its surface in real time during the reciprocating motion of the piston rod, preventing external impurities from entering the cylinder. At the same time, it can also help prevent a small amount of lubricating grease or hydraulic oil from spilling out of the cylinder.

[0003] If there is a dimensional deviation during the installation of the dustproof rubber ring, or if there is residual oil, iron filings, or dust on the outer circle of the piston rod or in the groove of the dustproof ring before installation, a foreign object isolation layer will be formed between the rubber ring and the piston rod, causing the lip to not fit tightly. External impurities will enter the gap between the dustproof ring and the guide sleeve directly with the reciprocating movement of the piston rod, and then invade the sealing cavity inside the cylinder, affecting the safe operation of the hydraulic cylinder. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a dustproof sealing device for hydraulic cylinder piston rod, which can effectively solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dustproof sealing device for a hydraulic cylinder piston rod, comprising two fixed plates, a cylinder body, a piston rod, and a fixed block. A fixed block is fixedly installed at the front end of the fixed plate. A rotating block is rotatably connected to the fixed block via sliding rods. The rotating block has four sliding grooves. The rotating block is penetrated by four sliding rods. A slider is fixedly installed at one end of each of the four sliding rods. A pressure plate is fixedly installed at the end of each of the four sliders. A sealing rubber ring is provided in the middle of the four pressure plates.

[0006] As a preferred embodiment of the dustproof sealing device for the piston rod of a hydraulic cylinder of this utility model, a second fixing plate is fixedly installed on the top of the fixing block, and the second fixing plate has a bolt hole. A third fixing plate is fixedly installed on the top of the rotating block, and the third fixing plate has a bolt hole.

[0007] As a preferred embodiment of the dustproof sealing device for the piston rod of a hydraulic cylinder according to this utility model, a threaded groove is provided around the outer side of the rotating block, and the rotating block is threadedly connected to the threaded rotating column through the threaded groove.

[0008] As a preferred embodiment of the dustproof sealing device for hydraulic cylinder piston rod of this utility model, a fixing plate is fixedly installed at both ends of the cylinder body, and four fixing rods are distributed along the cylinder body in an array. Both ends of the four fixing rods are fixedly connected to the fixing plate, and the piston rod passes through the fixing plate and is slidably connected to the fixing plate and the cylinder body.

[0009] As a preferred embodiment of the dustproof sealing device for the piston rod of a hydraulic cylinder according to this utility model, the bolt hole one is circular and the bolt hole two is arc-shaped.

[0010] In a preferred embodiment of the dustproof sealing device for a hydraulic cylinder piston rod according to this utility model, the sealing rubber ring is penetrated by the piston rod and is circular.

[0011] In a preferred embodiment of the dustproof sealing device for a hydraulic cylinder piston rod according to this utility model, the sliding groove is an inclined square groove.

[0012] The technical solution provided by this utility model has the following advantages compared with the known prior art: This invention utilizes a structure design of a rotating block and a pressing plate to place the rubber sealing ring inside the pressing plate. Then, rotating the rotating block causes the sliding rod and slider to move along the sliding groove. Since the sliding groove is inclined towards the sealing rubber ring, the four pressing plates clamp the rubber sealing ring. This structural design ensures that the rubber sealing ring and the piston rod are clamped together, preventing external impurities from directly entering the gap between the sealing rubber ring and the piston rod with the reciprocating motion of the piston rod.

[0013] 2. Through the structural design of fixing plate two and fixing plate three, after the rubber sealing ring is clamped with the piston rod, bolts are used to pass through bolt holes one and bolt holes two opened in fixing plate two and fixing plate three, and the bolts are tightened to limit the rotating block. This structural design can fix the rotating block and prevent the rotating block from rotating when the piston rod reciprocates, which would cause gaps between the sealing rubber ring and the piston rod. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the overall structure of the rotating block in this utility model; Figure 3 This is a schematic cross-sectional view of the threaded rotating column in this utility model; Figure 4 for Figure 1 A magnified view of a portion of region A in the middle; Figure 5 for Figure 3 A magnified view of a portion of region B in the middle.

[0016] 1. Fixed plate one; 2. Cylinder body; 3. Piston rod; 4. Fixed block; 5. Rotating block; 6. Sealing rubber ring; 7. Pressing plate; 8. Slider; 9. Sliding groove; 10. Sliding rod; 11. Threaded groove; 12. Fixed plate two; 13. Fixed plate three; 14. Bolt hole one; 15. Bolt hole two; 16. Fixed rod; 17. Threaded rotating column. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] The present invention will be further described below with reference to the embodiments.

[0019] This utility model provides a technical solution: such as Figure 1 - Figure 5 As shown in this embodiment, a dustproof sealing device for a hydraulic cylinder piston rod includes two fixed plates 1, a cylinder body 2, a piston rod 3, and a fixed block 4. The cylinder body 2 is made of high-quality carbon structural steel, which is cost-effective and has good comprehensive mechanical properties. It can meet the strength requirements of medium and low pressure systems, is easy to process, and its surface roughness is easy to control, ensuring a good seal. A fixed block 4 is fixedly installed at the front end of the fixed plate 1. The fixed block 4 is circular and is rotatably connected to a rotating block 5 via a sliding rod 10. The rotating block 5 has four sliding grooves 9. A sliding rod 10 runs through the entire structure, and a slider 8 is fixedly installed at one end of each of the four sliding rods 10. A pressure plate 7 is fixedly installed at the end of each of the four sliders 8. A sealing rubber ring 6 is provided in the middle of the four pressure plates 7. The sealing rubber ring 6 is made of fluororubber or polyurethane. Fluororubber is a temperature-resistant, oil-resistant, and corrosion-resistant material that is compatible with mineral oil, ester synthetic oil, phosphate ester fire-resistant hydraulic oil, etc. It has excellent high-pressure resistance, ozone resistance, aging resistance, and long service life. Polyurethane has strong wear resistance, excellent tear resistance, good dynamic sealing stability, and good compatibility with mineral oil, making it suitable for sealing scenarios involving high-frequency reciprocating motion.

[0020] like Figure 1 - Figure 5 As shown, a second fixing plate 12 is fixedly installed on the top of the fixing block 4. The second fixing plate 12 has a bolt hole 14. A third fixing plate 13 is fixedly installed on the top of the rotating block 5. Both the second fixing plate 12 and the third fixing plate 13 are rectangular. The third fixing plate 13 has a bolt hole 15. A threaded groove 11 is opened around the outer side of the rotating block 5, which corresponds to the thread of the threaded rotating column 17. The rotating block 5 is threadedly connected to the threaded rotating column 17 through the threaded groove 11. The first fixing plate 1 is fixedly installed at both ends of the cylinder body 2. Four fixing rods 16 are distributed along the array of the cylinder body 2. The fixing rods 16 are made of metal. Both ends of the four fixing rods 16 are fixedly connected to the first fixing plate 1. The piston rod 3 passes through the first fixing plate 1 and slides through the first fixing plate 1 and the cylinder body 2. The first bolt hole 14 is circular, and the second bolt hole 15 is arc-shaped. The sealing rubber ring 6 is passed through by the piston rod 3. The sealing rubber ring 6 is circular. The sliding groove 9 is an inclined square groove. When the rotating block 5 rotates, it can drive the sliding rod 10 to slide along the sliding groove 9.

[0021] This utility model provides a dustproof sealing device for a hydraulic cylinder piston rod, the specific working principle of which is as follows: During use, first place the rubber sealing ring 6 inside the pressure plate 7, then rotate the rotating block 5. The rotating block 5 drives the sliding rod 10 and the slider 8 to move along the sliding groove 9. Since the sliding groove 9 is inclined towards the sealing rubber ring 6, the four pressure plates 7 clamp the rubber sealing ring 6. After the rubber sealing ring 6 is clamped with the piston rod 3, use bolts to pass through the bolt holes 14 and 15 of the fixing plate 2 12 and fixing plate 3 13, and tighten the bolts to limit the rotating block 5. Finally, put the threaded rotating column 17 on the rotating block 5 along the threaded groove 11. When replacing, unscrew the bolts, rotate the rotating block 5 until the pressure plate 7 is loosened, and then remove the sealing rubber ring 6 for replacement. The operation is now complete.

[0022] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dustproof sealing device for a hydraulic cylinder piston rod, characterized in that: It includes two fixed plates (1), a cylinder (2), a piston rod (3) and a fixed block (4). The fixed plate (1) is fixedly installed with the fixed block (4) at its front end. The fixed block (4) is rotatably connected to a rotating block (5) via a sliding rod (10). The rotating block (5) has four sliding grooves (9). The rotating block (5) is penetrated by four sliding rods (10). A slider (8) is fixedly installed at one end of each of the four sliding rods (10). A pressure plate (7) is fixedly installed at the end of each of the four sliders (8). A sealing rubber ring (6) is provided in the middle of the four pressure plates (7).

2. The dustproof sealing device for a hydraulic cylinder piston rod according to claim 1, characterized in that: The top of the fixed block (4) is fixedly installed with a second fixed plate (12), and the second fixed plate (12) has a bolt hole (14). The top of the rotating block (5) is fixedly installed with a third fixed plate (13), and the third fixed plate (13) has a bolt hole (15).

3. The dustproof sealing device for a hydraulic cylinder piston rod according to claim 1, characterized in that: The rotating block (5) has a threaded groove (11) around its outer circumference, and the rotating block (5) is threadedly connected to the threaded rotating column (17) through the threaded groove (11).

4. The dustproof sealing device for a hydraulic cylinder piston rod according to claim 2, characterized in that: The cylinder (2) has a fixing plate (1) fixedly installed at both ends. The cylinder (2) has four fixing rods (16) distributed along the array. Both ends of the four fixing rods (16) are fixedly connected to the fixing plate (1). The piston rod (3) passes through the fixing plate (1) and is slidably connected to the fixing plate (1) and the cylinder (2).

5. A dustproof sealing device for a hydraulic cylinder piston rod according to claim 2, characterized in that: The first bolt hole (14) is circular, and the second bolt hole (15) is arc-shaped.

6. The dustproof sealing device for a hydraulic cylinder piston rod according to claim 1, characterized in that: The sealing rubber ring (6) is penetrated by the piston rod (3), and the sealing rubber ring (6) is circular.

7. The dustproof sealing device for a hydraulic cylinder piston rod according to claim 1, characterized in that: The sliding groove (9) is an inclined square groove.

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