Dustproof sealing inclined oil cylinder

Abstract

The utility model is suitable for hydraulic oil cylinder technical field provides a dustproof sealing inclined oil cylinder, including main body and dustproof subassembly and sealing gasket being arranged in the inside of main body, the main body includes dustproof end cover, is located dustproof end cover one end's cylinder barrel and piston rod, sealing gasket is fixedly installed in dustproof end cover, dustproof subassembly includes the dustproof ring of being slidably installed in dustproof end cover and the buffer ring of being located between sealing gasket and dustproof ring, the piston rod penetrates dustproof ring, both ends of dustproof ring are equipped with dustproof part, dustproof end cover in both sides of dustproof ring are equipped with limiting portion. The device solved the problem that dust, impurity through the gap between sealing gasket and guide sleeve enters the inside of oil cylinder and mixes in hydraulic oil, causes the problem of reducing the service life of sealing performance and oil cylinder, reaches the effect that the bidirectional dustproof ring is increased between guide sleeve and sealing gasket, effectively blocks dust mixing in hydraulic oil, reduces the wear and tear of sealing member.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and more specifically, it relates to a dustproof and sealed tilting cylinder. Background Technology

[0002] A tilting cylinder is a hydraulic actuator primarily used to tilt mechanical components. It is widely used in construction machinery, hydraulic lifting equipment, mining machinery, and other fields to adjust the tilt angle of equipment or to achieve specific motion functions.

[0003] If dust, impurities, and particles enter the tilting cylinder during use, they will not only scratch the seals, causing accelerated wear and reducing sealing performance, but also mix into the hydraulic oil, exacerbating the wear of components such as the cylinder barrel, piston, and piston rod, thus reducing the service life of the cylinder.

[0004] The utility model patent document with announcement number CN218862982U discloses a forklift tilting cylinder. By installing a sealing gasket on the outside of the guide sleeve, dust and impurities are prevented from entering the cylinder. However, during the use of the tilting cylinder, dust and impurities can still enter the cylinder through the gap between the sealing gasket and the guide sleeve and mix into the hydraulic oil, resulting in a reduction in sealing performance and cylinder service life. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a dustproof and sealed tilting cylinder that adds a bidirectional dustproof ring between the guide sleeve and the sealing gasket, effectively preventing dust from mixing into the hydraulic oil while reducing wear on the seals.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A dustproof and sealed tilting cylinder includes a main body and a dustproof component and a sealing gasket disposed inside the main body. The main body includes a dustproof end cap, a cylinder barrel disposed at one end of the dustproof end cap, and a piston rod. The sealing gasket is fixedly disposed inside the dustproof end cap. The dustproof component includes a dustproof ring slidably disposed inside the dustproof end cap and a buffer ring disposed between the sealing gasket and the dustproof ring. The piston rod passes through the dustproof ring. Dustproof portions are provided at both ends of the dustproof ring. Limiting portions are provided on both sides of the dustproof ring inside the dustproof end cap. When the dustproof ring moves under the drive of the piston rod until one dustproof portion abuts against one of the limiting portions, a receiving cavity is formed between the other dustproof portion and the other limiting portion.

[0008] The present invention is further configured such that: an abutment groove is provided inside the dustproof end cap, a limiting part is formed on the side wall of the abutment groove, and a limiting part is formed at the end of the buffer ring.

[0009] This utility model is further configured as follows:

[0010] The height of the dustproof ring is less than the height between the two limiting parts. The dustproof part is a first dustproof part and a second dustproof part, which are arranged along the circumference of the dustproof ring.

[0011] The present invention is further configured such that: both the first dustproof part and the second dustproof part are V-shaped structures, and the first dustproof part and the second dustproof part are symmetrically arranged.

[0012] By adopting the above technical solution, when the piston rod moves towards the side closer to the dustproof end cover, the first dustproof part on the dustproof ring can abut against the abutment groove, blocking the dust inside its V-shaped structure. When the piston rod moves away from the side of the dustproof end cover, the second dustproof part on the dustproof ring can abut against the buffer ring, blocking the dust inside its V-shaped structure, thus preventing the dust between the dustproof end cover and the piston rod from continuing to enter the tilting cylinder.

[0013] The present invention is further configured such that the end of the buffer ring away from the dustproof ring is connected to the sealing gasket.

[0014] The present invention is further configured such that: a plurality of fitting grooves are provided around the end of the dustproof end cap, the fitting grooves are sealed and slidably connected with the end of the piston rod, and the abutment groove is provided inside the dustproof end cap at the end away from the fitting grooves.

[0015] The present invention is further configured such that: the sealing gasket has a first abutting portion along its circumference at the end near the buffer ring, and the sealing gasket has a second abutting portion along its circumference at the end away from the buffer ring.

[0016] The present invention is further configured such that: a guide sleeve is provided at one end of the sealing gasket; the dustproof component, the sealing gasket and the guide sleeve are arranged inside the dustproof end cover from the end towards the side near the cylinder; a guide cavity is opened inside the guide sleeve; the piston rod is arranged through the guide cavity; and a limit washer is provided on the side of the guide cavity near the sealing gasket.

[0017] The present invention is further configured such that: the limiting washer is arranged along the circumferential direction of the guide cavity, and a limiting groove is formed around the side of the limiting washer near the sealing gasket.

[0018] The present invention is further configured such that the shape of the limiting groove is adapted to the sealing gasket and abuts against the sealing gasket.

[0019] The beneficial effects of this utility model are:

[0020] A dustproof ring and a buffer ring are installed between the sealing gasket and the dustproof end cap. The dustproof ring has a first dustproof part and a second dustproof part arranged bidirectionally. As the dustproof ring moves with the piston rod, the first and second dustproof parts of the V-shaped structure can abut against the abutment groove and the buffer ring, respectively. Dust entering the tilting cylinder can enter the V-shaped structure along with the movement of the dustproof ring. The first and second dustproof parts block the dust inside the V-shaped structure, preventing dust from continuing to enter the tilting cylinder and causing a decrease in sealing performance. On the other hand, during the operation of the tilting cylinder, the buffer ring provides cushioning between the dustproof ring and the sealing gasket, preventing dust in the second dustproof part from directly contacting and rubbing against the sealing gasket, thereby reducing the wear of the sealing gasket and extending its service life. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the structure of the dustproof and sealed tilting oil cylinder of this utility model.

[0023] Figure 2 for Figure 1 The left view shown.

[0024] Figure 3 For along Figure 2 A cross-sectional view showing section line AA.

[0025] Figure 4 for Figure 1 The diagram shows the structure of the dustproof end cap.

[0026] Figure 5 for Figure 4 The top view shown.

[0027] Figure 6 For along Figure 5 The sectional view showing the BB section line.

[0028] Figure 7 for Figure 4 The diagram shows the exploded structure of the dustproof end cap.

[0029] Figure 8 For along Figure 7 A cross-sectional view showing the CC section line.

[0030] Explanation of reference numerals in the attached drawings: 1. Main body; 11. Dustproof end cap; 111. Fitting groove; 112. Abutment groove; 12. Cylinder barrel; 13. Cylinder seat; 14. Piston; 15. Piston rod;

[0031] 2. Dustproof components; 21. Dustproof ring; 211. First dustproof part; 212. Second dustproof part; 22. Buffer ring;

[0032] 3. Sealing gasket; 31. First abutment part; 32. Second abutment part; 33. Sealing ring;

[0033] 4. Guide sleeve; 41. Guide cavity; 42. Limiting washer; 43. Limiting groove. Detailed Implementation

[0034] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, illustrating only the basic aspects of the present utility model, and therefore only shows the components relevant to the present utility model. 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.

[0035] Please refer to Figure 1-6 A dustproof, sealed tilting hydraulic cylinder includes a main body 1, a dustproof assembly 2, and a sealing gasket 3 disposed inside the main body 1. The main body 1 includes a dustproof end cap 11, a cylinder barrel 12, and a piston rod 15 penetrating both the dustproof end cap 11 and the cylinder barrel 12. An opening is provided inside the cylinder barrel 12, and the dustproof end cap 11 is connected to one end of the cylinder barrel 12. A cylinder seat 13 is connected to the end of the cylinder barrel 12 away from the dustproof end cap 11. A piston 14 is disposed inside the cylinder seat 13 and is fitted inside the piston rod 15. Both ends of the piston rod 15 penetrate the dustproof end cap 11 and the cylinder seat 13, respectively. An abutment groove 112 is provided inside the dustproof end cap 11, and multiple fitting grooves 111 are provided around the end of the dustproof end cap 11. The fitting grooves 111 are slidably and sealingly connected to the end of the piston rod 15. The abutment grooves 112 are located inside the dustproof end cap 11 at the end away from the fitting grooves 111.

[0036] Please refer to Figure 3-8The dustproof assembly 2 includes a dustproof ring 21 slidably disposed within the dustproof end cap 11 and a buffer ring 22 disposed between the sealing gasket 3 and the dustproof ring 21. The piston rod 15 passes through the dustproof ring 21, and both ends of the dustproof ring 21 are provided with dustproof portions. The dustproof portions are a first dustproof portion 211 and a second dustproof portion 212, which are arranged along the circumference of the dustproof ring 21. Both the first dustproof portion 211 and the second dustproof portion 212 have a V-shaped structure and are symmetrically arranged. The inner wall of the dustproof ring 21 near the piston rod 15 is provided with a high-friction coating. The friction between the dustproof ring 21 and the piston rod 15 is greater than the friction between the dustproof ring 21 and the abutment groove 112, allowing the dustproof ring 21 to slide axially along the dustproof end cap 11 following the piston rod 15. When the tilting cylinder extends or retracts, the dustproof ring 21 can slide axially along the dustproof end cover 11 along with the piston rod 15. Limiting portions are provided on both sides of the dustproof ring 21 inside the dustproof end cover 11; the limiting portion is formed on the side wall of the abutment groove 112, and the limiting portion is formed at the end of the buffer ring 22. The height (h1) of the dustproof ring 21 is less than the height (h2) between the two limiting portions, allowing the dustproof ring 21 to move within the limiting portions. When the dustproof ring 21 moves under the drive of the piston rod 15 until one of the dustproof portions abuts against one of the limiting portions, a receiving cavity is formed between the other dustproof portion and the other limiting portion.

[0037] When the piston rod 15 moves closer to the dustproof end cap 11, the first dustproof part 211 on the dustproof ring 21 abuts against the abutment groove 112. At this time, a receiving cavity is formed between the second dustproof part 212 and the buffer ring 22 in the limiting part. As the piston rod 15 continues to move, dust enters the tilting cylinder through the gap between the dustproof end cap 11 and the piston rod 15. The first dustproof part 211 remains in contact with the limiting part, and the dust on the piston rod 15 is collected into the receiving cavity. As the second dustproof part 212 enters the V-shaped structure, the dust can be blocked inside the V-shaped structure, preventing dust between the dustproof end cap 11 and the piston rod 15 from continuing to enter the tilting cylinder and causing a decrease in sealing performance.

[0038] When the piston rod 15 moves away from the dustproof end cap 11, the second dustproof part 212 on the dustproof ring 21 can abut against the buffer ring 22. At this time, the first dustproof part 211 and the end of the limiting part near the fitting groove 11 form a connected receiving cavity. As the piston rod 15 continues to move, dust enters the tilting cylinder through the gap between the dustproof end cap 11 and the piston rod 15. The second dustproof part 2121 remains in contact with the limiting part, and the dust on the piston rod 15 is collected into the receiving cavity. As the first dustproof part 211 enters the V-shaped structure, the dust can be blocked inside the V-shaped structure by the first dustproof part 211, preventing dust between the dustproof end cap 11 and the piston rod 15 from continuing to enter the tilting cylinder and causing a decrease in sealing performance.

[0039] The end of the buffer ring 22 furthest from the dustproof ring 21 is connected to the sealing gasket 3. By providing a buffer between the dustproof ring 21 and the sealing gasket 3 through the buffer ring 22, the dust in the second dustproof part 212 can be prevented from directly contacting the sealing gasket 3 and causing friction during the operation of the tilting cylinder, thereby reducing the wear of the sealing gasket 3 and extending its service life.

[0040] Please refer to Figure 3-8 The sealing gasket 3 has a first abutting portion 31 along its circumference at the end near the buffer ring 22, which abuts against the buffer ring 22. The sealing gasket 3 also has a second abutting portion 32 along its circumference at the end away from the buffer ring 22, which abuts against the guide sleeve 4. By placing the sealing gasket 3 between the buffer ring 22 and the guide sleeve 4, the interior of the tilting cylinder can be effectively sealed. A sealing ring 33 is located in the middle of the sealing gasket 3. During the contact between the sealing gasket 3 and the guide sleeve 4, the sealing ring 33 can adjust synchronously with the extension and retraction of the tilting cylinder to ensure a good seal.

[0041] Please refer to Figure 3-8 A guide sleeve 4 is provided at one end of the sealing gasket 3. The dustproof assembly 2, the sealing gasket 3, and the guide sleeve 4 are arranged inside the dustproof end cover 11 from the end towards the side near the cylinder 12. A guide cavity 41 is opened inside the guide sleeve 4. The shape of the guide cavity 41 is adapted to the piston rod 15, and the piston rod 15 passes through the guide cavity 41. A limiting washer 42 is provided on the side of the guide cavity 41 near the sealing gasket 3. The limiting washer 42 is arranged along the circumference of the guide cavity 41, and a limiting groove 43 is opened around the side of the limiting washer 42 near the sealing gasket 3. The shape of the limiting groove 43 is adapted to the second abutment part 32 on the sealing gasket 3. The limiting groove 43 abuts against the second abutment part 32 on the sealing gasket 3, thereby ensuring the seal between the sealing gasket 3 and the guide sleeve 4.

[0042] A dustproof ring 21 and a buffer ring 22 are provided between the sealing gasket 3 and the dustproof end cap 11. The dustproof ring 21 has a first dustproof part 211 and a second dustproof part 212 bidirectionally arranged. As the dustproof ring 21 moves with the piston rod 15, the first dustproof part 211 and the second dustproof part 212 of the V-shaped structure can abut against the abutment groove 112 and the buffer ring 22 respectively. Dust entering the tilting cylinder can enter the V-shaped structure with the movement of the dustproof ring 21. The first dustproof part 211 and the second dustproof part 212 block the dust inside the V-shaped structure, preventing dust from continuing to enter the tilting cylinder and causing a decrease in sealing performance. On the other hand, during the operation of the tilting cylinder, the buffer ring 22 provides buffering between the dustproof ring 21 and the sealing gasket 3, preventing dust in the second dustproof part 212 from directly contacting the sealing gasket 3 and causing friction, thereby reducing the wear of the sealing gasket 3 and extending its service life.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A dustproof, sealed, tilting hydraulic cylinder, characterized in that: The device includes a main body (1) and a dustproof assembly (2) and a sealing gasket (3) disposed inside the main body (1). The main body (1) includes a dustproof end cap (11), a cylinder (12) disposed at one end of the dustproof end cap (11), and a piston rod (15). The sealing gasket (3) is fixedly disposed inside the dustproof end cap (11). The dustproof assembly (2) includes a dustproof ring (21) slidably disposed inside the dustproof end cap (11) and a buffer ring (22) disposed between the sealing gasket (3) and the dustproof ring (21). The piston rod (15) passes through the dustproof ring (21). Both ends of the dustproof ring (21) are provided with dustproof parts. The dustproof end cap (11) is provided with limiting parts on both sides of the dustproof ring (21). When the dustproof ring (21) moves under the drive of the piston rod (15) to the point where one of the dustproof parts abuts against one of the limiting parts, a receiving cavity is formed between the other dustproof part and the other limiting part.

2. The dustproof, sealed, tilting hydraulic cylinder according to claim 1, characterized in that: The dustproof end cap (11) has an abutment groove (112) inside, the side wall of the abutment groove (112) forms a limiting part, and the end of the buffer ring (22) forms a limiting part.

3. A dustproof, sealed, tilting hydraulic cylinder according to claim 2, characterized in that: The height of the dustproof ring (21) is less than the height between the two limiting parts. The dustproof parts are the first dustproof part (211) and the second dustproof part (212). The first dustproof part (211) and the second dustproof part (212) are arranged along the circumferential direction of the dustproof ring (21).

4. A dustproof, sealed, tilting hydraulic cylinder according to claim 3, characterized in that: The first dustproof part (211) and the second dustproof part (212) are both V-shaped structures, and the first dustproof part (211) and the second dustproof part (212) are symmetrically arranged.

5. A dustproof, sealed, tilting hydraulic cylinder according to claim 4, characterized in that: The end of the buffer ring (22) away from the dustproof ring (21) is connected to the sealing gasket (3).

6. A dustproof, sealed, tilting hydraulic cylinder according to claim 2, characterized in that: The dustproof end cap (11) has a plurality of fitting grooves (111) around its end. The fitting grooves (111) are sealed and slidably connected to the end of the piston rod (15). The abutment groove (112) is located inside the dustproof end cap (11) at one end away from the fitting grooves (111).

7. A dustproof, sealed, tilting hydraulic cylinder according to claim 1, characterized in that: The sealing gasket (3) has a first abutting part (31) along its circumference at the end near the buffer ring (22), and a second abutting part (32) along its circumference at the end away from the buffer ring (22).

8. A dustproof, sealed, tilting hydraulic cylinder according to claim 1, characterized in that: The sealing gasket (3) is provided with a guide sleeve (4) at one end. The dustproof assembly (2), the sealing gasket (3) and the guide sleeve (4) are arranged in the dustproof end cover (11) from the end towards the side close to the cylinder (12). The guide sleeve (4) has a guide cavity (41) inside. The piston rod (15) passes through the guide cavity (41). The guide cavity (41) is provided with a limit washer (42) on the side close to the sealing gasket (3).

9. A dustproof, sealed, tilting hydraulic cylinder according to claim 8, characterized in that: The limiting washer (42) is arranged along the circumferential direction of the guide cavity (41), and the limiting washer (42) has a limiting groove (43) around the side near the sealing gasket (3).

10. A dustproof, sealed, tilting hydraulic cylinder according to claim 9, characterized in that: The limiting groove (43) is shaped to fit the sealing gasket (3) and abuts against the sealing gasket (3).

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