A dustproof hydraulic cylinder

Abstract

This utility model relates to the field of hydraulic cylinder structure technology and discloses a dustproof hydraulic cylinder, including a hydraulic cylinder body, a telescopic column at the top of the hydraulic cylinder body, and a dustproof mechanism on the hydraulic cylinder body. The dustproof mechanism includes a movable sleeve, which is detachably connected to the top of the hydraulic cylinder body. A hollow rubber bladder is fixedly connected to the inner wall of the movable sleeve, and a rubber sleeve is fixedly connected to the inner wall of the hollow rubber bladder. Through the design of the rubber sleeve, this utility model allows it to fit tightly and dynamically against the outer wall of the telescopic column. During the retraction of the telescopic column, dust on its outer wall is filtered out, ensuring the cleanliness of the connection between the hydraulic cylinder body and the telescopic column. Simultaneously, through the design of the hollow frame and the dust suction hole, suction can be used to absorb dust accumulated on the rubber sleeve from the dust suction hole, avoiding the problem of large dust accumulation and further ensuring the telescopic effect of the hydraulic cylinder body.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder structure technology, specifically to a dustproof hydraulic cylinder. 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, eliminates transmission backlash, and provides smooth movement. Therefore, it is widely used in the hydraulic systems of various machines.

[0003] Chinese patent discloses a hydraulic cylinder, publication number CN219953796U. The technical solution disclosed in this patent document is as follows: it includes a cylinder body, a spiral fin fixedly connected to the surface of the cylinder body, a cylinder fixedly sleeved on the surface of the cylinder body, the surface of the spiral fin fixedly connected to the inner wall of the cylinder, and a perforated connecting block fixedly connected to the surface of the spiral fin. The top and bottom of the perforated connecting block are respectively fixedly connected to the inner wall of the cylinder and the surface of the cylinder body.

[0004] To address the issue of poor heat dissipation for hydraulic oil using natural cooling methods, existing technologies employ a combination of spiral fins and blowers. However, this approach still fails to provide dust protection for the expansion joints. In dusty environments, dust accumulates at the expansion joints, which can easily penetrate the cylinder and interfere with its normal operation. Utility Model Content

[0005] The purpose of this utility model is to provide a dustproof hydraulic cylinder, which solves the problem that the existing technology cannot protect the telescopic parts from dust.

[0006] This utility model provides the following technical solution: a dustproof hydraulic cylinder, including a hydraulic cylinder body, a telescopic column at the top of the hydraulic cylinder body, a dustproof mechanism on the hydraulic cylinder body, the dustproof mechanism including a movable sleeve, the movable sleeve being detachably connected to the top of the hydraulic cylinder body, a hollow rubber bladder fixedly connected to the inner wall of the movable sleeve, a rubber sleeve fixedly connected to the inner wall of the hollow rubber bladder, the inner wall of the rubber sleeve being movably connected to the outer wall of the telescopic column, a rubber washer fixedly connected to the bottom of the movable sleeve, the bottom of the rubber washer being movably connected to the top of the hydraulic cylinder body, a connecting foot fixedly installed at the top of the movable sleeve, a hollow frame fixedly installed at the top of the connecting foot, and a dust suction hole opened on the inner wall of the hollow frame. Through the design of the rubber sleeve, dust on the outer wall of the piston rod can be filtered out, ensuring the safety of the extension and retraction of the hydraulic cylinder body.

[0007] As a preferred embodiment of the above technical solution, an internally threaded cylinder is fixedly connected to the front of the hollow frame, and a flexible tube is threadedly connected to the front of the internally threaded cylinder. A hollow chamber is fixedly connected to the end of the flexible tube away from the hollow frame, and the flexible tube allows the hollow chamber and the hollow frame to be connected.

[0008] As a preferred embodiment of the above technical solution, the hollow chamber is fixedly installed on the front of the hydraulic cylinder body, an inclined dust filter is fixedly installed on the inner wall of the hollow chamber, and a cylindrical suction fan is fixedly connected to the bottom of the hollow chamber. The inclined dust filter can block the dust absorbed by the cylindrical suction fan.

[0009] As a preferred embodiment of the above technical solution, a movable cover plate is movably inserted into the left side of the hollow compartment, and a rotation limiting block is rotatably connected to the left side of the hollow compartment. The right side of the rotation limiting block is movably connected to the left side of the movable cover plate, and the rotation limiting block is used to limit the movable cover plate after insertion.

[0010] As a preferred embodiment of the above technical solution, a receiving cylinder is fixedly connected to the bottom of the cylindrical suction fan, and a conveying pipe is fixedly connected to the bottom of the receiving cylinder. The conveying pipe is used to transfer the air output by the cylindrical suction fan to the hollow ring.

[0011] As a preferred embodiment of the above technical solution, the dustproof mechanism further includes a hollow ring and heat dissipation fins. The heat dissipation fins are fixedly connected to the outer wall of the hydraulic cylinder body, and the hollow ring is fixedly sleeved on the outer wall of the hydraulic cylinder body and located at the bottom of the heat dissipation fins. The heat dissipation fins can improve the natural heat dissipation efficiency of the hydraulic cylinder body.

[0012] As a preferred embodiment of the above technical solution, an annular exhaust net is fixedly installed on the top of the inner wall of the hollow ring, and the end of the conveying pipe away from the cylindrical suction fan is fixedly connected to the front of the hollow ring. The annular exhaust net can make the cooling air blown evenly to the outer surface of the hydraulic cylinder body.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention utilizes a rubber gasket design to ensure a sealed connection between the bottom of the movable sleeve and the top of the hydraulic cylinder body. The rubber sleeve also allows for a tight, movable fit against the outer wall of the telescopic column, filtering out dust from its outer wall during retraction and maintaining the cleanliness of the connection between the hydraulic cylinder body and the telescopic column. Furthermore, the hollow frame and dust extraction hole design allow for suction to draw dust accumulated on the rubber sleeve, preventing excessive dust buildup and further ensuring the effective extension and retraction of the hydraulic cylinder body. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the movable sleeve of this utility model;

[0017] Figure 3 This is an exploded structural diagram of the hollow frame of this utility model;

[0018] Figure 4 This is a cross-sectional structural diagram of the hollow compartment of this utility model;

[0019] Figure 5 for Figure 1 Enlarged view of the structure at point A in the middle.

[0020] In the diagram: 1. Hydraulic cylinder body; 11. Telescopic column; 2. Dustproof mechanism; 21. Movable sleeve; 22. Hollow rubber bladder; 23. Rubber sleeve; 24. Rubber gasket; 25. Connecting foot; 26. Hollow frame; 27. Dust suction hole; 28. Hose; 281. Hollow chamber; 282. Rotation limit block; 283. Movable cover plate; 284. Inclined dust filter; 285. Cylindrical suction fan; 286. Conveying pipe; 29. ​​Hollow ring; 291. Annular exhaust net; 292. Heat dissipation fins. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] like Figures 1-3As shown, this utility model provides a technical solution: a dustproof hydraulic cylinder, including a hydraulic cylinder body 1, a telescopic column 11 provided on the top of the hydraulic cylinder body 1, a dustproof mechanism 2 provided on the hydraulic cylinder body 1, the dustproof mechanism 2 including a movable sleeve 21, the movable sleeve 21 being detachably connected to the top of the hydraulic cylinder body 1, a hollow rubber bladder 22 fixedly connected to the inner wall of the movable sleeve 21, a rubber sleeve 23 fixedly connected to the inner wall of the hollow rubber bladder 22, the inner wall of the rubber sleeve 23 being movably connected to the outer wall of the telescopic column 11, a rubber washer 24 fixedly connected to the bottom of the movable sleeve 21, the bottom of the rubber washer 24 being movably connected to the top of the hydraulic cylinder body 1, and a connecting foot 25 fixedly installed on the top of the movable sleeve 21. A hollow frame 26 is fixedly installed at the top. A dust suction hole 27 is opened on the inner wall of the hollow frame 26. The inner wall of the rubber sleeve 23 is tightly and movably fitted with the outer wall of the telescopic column 11. During the contraction of the telescopic column 11, the rubber sleeve 23 can filter out the dust on the outer wall of the telescopic column 11, ensuring the cleanliness of the connection between the hydraulic cylinder body 1 and the telescopic column 11. The rubber gasket 24 can make the bottom of the movable sleeve 21 and the top of the hydraulic cylinder body 1 seal together. The inner cavity of the hollow rubber bladder 22 is filled with gas. When the telescopic column 11 contracts, it will rub against the inner wall of the rubber sleeve 23. The friction will generate heat. The heat will cause the hollow rubber bladder 22 to expand and undergo elastic deformation, improving the effect of the rubber sleeve 23 fitting against the outer wall of the telescopic column 11.

[0023] As one implementation method in this embodiment, such as Figure 1 , Figure 4 As shown, an internally threaded cylinder is fixedly connected to the front of the hollow frame 26, and a flexible hose 28 is threadedly connected to the front of the internally threaded cylinder. A hollow chamber 281 is fixedly connected to the end of the flexible hose 28 away from the hollow frame 26. The hollow chamber 281 is fixedly installed on the front of the hydraulic cylinder body 1. An inclined dust filter 284 is fixedly installed on the inner wall of the hollow chamber 281. A cylindrical suction fan 285 is fixedly connected to the bottom of the hollow chamber 281. By controlling the operation of the cylindrical suction fan 285, gas can be absorbed from the suction hole 27 through the design of the flexible hose 28, and dust accumulated on the rubber sleeve 23 can be absorbed at the same time. Meanwhile, the dust is filtered out in the inner cavity of the hollow chamber 281 by the inclined dust filter 284. During maintenance, the rotating limit block 282 is rotated to release its restriction on the movable cover 283, and then the movable cover 283 is pulled out from the side of the hollow chamber 281, and the dust on the inclined dust filter 284 can be cleaned.

[0024] As one implementation method in this embodiment, such as Figure 1 and Figure 5As shown, a movable cover plate 283 is movably inserted into the left side of the hollow chamber 281. A rotation limit block 282 is rotatably connected to the left side of the hollow chamber 281. The right side of the rotation limit block 282 is movably connected to the left side of the movable cover plate 283. A receiving cylinder is fixedly connected to the bottom of the cylindrical suction fan 285. A conveying pipe 286 is fixedly connected to the bottom of the receiving cylinder. The dustproof mechanism 2 also includes a hollow ring 29 and a heat dissipation fin 292. The heat dissipation fin 292 is fixedly connected to the outer wall of the hydraulic cylinder body 1. The hollow ring 29 is fixedly sleeved on the outer wall of the hydraulic cylinder body 1 and located at the bottom of the heat dissipation fin 292. An annular exhaust net 291 is fixedly installed on the top of the inner wall of the hollow ring 29. The end of the conveying pipe 286 away from the cylindrical suction fan 285 is fixedly connected to the front of the hollow ring 29. Through the design of the heat dissipation fins 292, the natural heat dissipation efficiency of the hydraulic cylinder body 1 can be improved. During the operation of the cylindrical suction fan 285, the gas output by it can be transmitted to the hollow ring 29 through the conveying pipe 286. The gas is then ejected from the top of the annular exhaust net 291, which increases the air flow rate on the outer surface of the hydraulic cylinder body 1 and the heat dissipation fins 292, thereby realizing the function of heat dissipation protection for the hydraulic cylinder body 1.

[0025] Working principle: During the retraction of the telescopic column 11, the rubber sleeve 23 can filter out the dust on the outer wall of the telescopic column 11, ensuring the cleanliness of the connection between the hydraulic cylinder body 1 and the telescopic column 11. The cylindrical suction fan 285 is controlled to work, and gas is absorbed from the dust suction hole 27. The dust accumulated on the rubber sleeve 23 can be absorbed and filtered out in the inner cavity of the hollow chamber 281. The gas output by the cylindrical suction fan 285 can be transmitted to the hollow ring 29, and the gas is then ejected from the top of the annular exhaust net 291 to complete the heat dissipation of the hydraulic cylinder body 1.

[0026] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A dustproof hydraulic cylinder, comprising a hydraulic cylinder body (1), wherein a telescopic column (11) is provided on the top of the hydraulic cylinder body (1), characterized in that: The hydraulic cylinder body (1) is provided with a dustproof mechanism (2). The dustproof mechanism (2) includes a movable sleeve (21). The movable sleeve (21) is detachably connected to the top of the hydraulic cylinder body (1). A hollow rubber bladder (22) is fixedly connected to the inner wall of the movable sleeve (21). A rubber sleeve (23) is fixedly connected to the inner wall of the hollow rubber bladder (22). The inner wall of the rubber sleeve (23) is movably connected to the outer wall of the telescopic column (11). A rubber washer (24) is fixedly connected to the bottom of the movable sleeve (21). The bottom of the rubber washer (24) is movably connected to the top of the hydraulic cylinder body (1). A connecting foot (25) is fixedly installed on the top of the movable sleeve (21). A hollow frame (26) is fixedly installed on the top of the connecting foot (25). A dust suction hole (27) is opened on the inner wall of the hollow frame (26).

2. A dustproof hydraulic cylinder according to claim 1, characterized in that: The hollow frame (26) is fixedly connected to an internally threaded cylinder on its front side, and a flexible tube (28) is threadedly connected to the front side of the internally threaded cylinder. A hollow chamber (281) is fixedly connected to the end of the flexible tube (28) away from the hollow frame (26).

3. A dustproof hydraulic cylinder according to claim 2, characterized in that: The hollow chamber (281) is fixedly installed on the front of the hydraulic cylinder body (1). An inclined dust filter (284) is fixedly installed on the inner wall of the hollow chamber (281). A cylindrical suction fan (285) is fixedly connected to the bottom of the hollow chamber (281).

4. A dustproof hydraulic cylinder according to claim 2, characterized in that: A movable cover plate (283) is movably inserted into the left side of the hollow compartment (281), and a rotation limit block (282) is rotatably connected to the left side of the hollow compartment (281). The right side of the rotation limit block (282) is movably connected to the left side of the movable cover plate (283).

5. A dustproof hydraulic cylinder according to claim 3, characterized in that: The bottom of the cylindrical suction fan (285) is fixedly connected to a receiving cylinder, and the bottom of the receiving cylinder is fixedly connected to a conveying pipe (286).

6. A dustproof hydraulic cylinder according to claim 5, characterized in that: The dustproof mechanism (2) also includes a hollow ring (29) and a heat dissipation fin (292). The heat dissipation fin (292) is fixedly connected to the outer wall of the hydraulic cylinder body (1), and the hollow ring (29) is fixedly sleeved on the outer wall of the hydraulic cylinder body (1) and located at the bottom of the heat dissipation fin (292).

7. A dustproof hydraulic cylinder according to claim 6, characterized in that: An annular exhaust net (291) is fixedly installed on the top of the inner wall of the hollow ring (29), and the end of the conveying pipe (286) away from the cylindrical suction fan (285) is fixedly connected to the front of the hollow ring (29).

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