Dustproof oil seal

Abstract

The utility model relates to the technical field of sealing rings, and provides a dustproof oil seal which comprises an annular ring, one end of the annular ring is provided with a Y-shaped dustproof part, the other end of the annular ring is provided with a longitudinal receding groove, the inner wall of the annular ring is provided with a mounting groove, and the mounting groove is located on the outer side of the side, close to a piston, of the longitudinal receding groove. The auxiliary ring is arranged in the mounting groove and the positioning groove at the same time, and the thickness of the auxiliary ring is equal to the sum of the width of the longitudinal receding groove, the thickness of the mounting groove and the thickness of the positioning groove. By means of the technical scheme, the technical problem that in the prior art, a traditional oil seal is unstable in sealing effect is solved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure relate to the technical field of sealing rings, and in particular, to a dustproof oil seal. BACKGROUND

[0002] In the oil cylinder system, the sealing between the piston and the oil cylinder is crucial, directly related to the working efficiency, stability of the hydraulic system and the service life of related components. However, the traditional oil seal has many problems in actual application, and it is difficult to meet the increasingly stringent use requirements of modern oil cylinder systems.

[0003] The early oil seal structure is relatively simple, and the sealing performance is limited, which is difficult to effectively block dust, impurities and other pollutants from entering the inside of the oil cylinder. During the reciprocating motion of the oil cylinder piston, these pollutants are easily attached to the inner wall of the oil cylinder and the surface of the piston, and enter the oil cylinder with the movement of the piston, thereby polluting the hydraulic oil, causing the hydraulic components to wear out, reducing the working efficiency of the hydraulic system, and even causing failure, shortening the service life of related components. In addition to the dustproof performance, the traditional oil seal performs poorly in preventing hydraulic oil leakage. Due to the lack of effective sealing structure design and material selection, hydraulic oil is easily leaked from the gap between the oil seal and the piston and the oil cylinder. This not only causes waste of hydraulic oil, but also can affect the working stability of the oil cylinder, causing the system pressure to be unstable, affecting the normal operation of the equipment. Moreover, hydraulic oil leakage can also pollute the surrounding environment, especially in some places with high environmental requirements, such as food processing, pharmaceutical manufacturing and other industries, the consequences of hydraulic oil leakage are more serious.

[0004] The installation process of the traditional oil seal also has many inconveniences. The structure design often lacks clear positioning methods, and the operator needs to spend a lot of time adjusting and aligning during installation, which not only increases the installation difficulty, but also easily leads to poor sealing effect due to improper installation. This not only reduces the installation efficiency, but also can cause a series of problems after the equipment is put into use, requiring secondary installation or maintenance, increasing the use cost and maintenance workload.

[0005] In addition, the traditional oil seal is insufficient in adapting to the movement of the piston. During the reciprocating motion of the piston, the oil seal needs to constantly withstand changes in pressure and friction force, and the material and structure of the traditional oil seal are difficult to maintain good performance under such complex working conditions, which is prone to deformation, wear and other problems, further weakening the sealing and dustproof effect. SUMMARY

[0006] To overcome the above-mentioned defects, embodiments of the present disclosure provide a dustproof oil seal, which solves the technical problem of unstable sealing effect of the traditional oil seal in the prior art.

[0007] According to one aspect, at least one embodiment of this disclosure provides a dustproof oil seal for sealing between a cylinder piston and the inner wall of a cylinder, the piston having a positioning groove, comprising:

[0008] An annular ring, one end of which has a Y-shaped dustproof part, and the other end of which has a longitudinal clearance groove. The inner wall of the annular ring has a mounting groove, which is located on the outer side of the longitudinal clearance groove near the piston.

[0009] An auxiliary ring is provided in both the mounting groove and the positioning groove. The thickness of the auxiliary ring is equal to the sum of the width of the longitudinal clearance groove, the thickness of the mounting groove, and the thickness of the positioning groove.

[0010] For example, at least one embodiment of this disclosure provides a dustproof oil seal in which there are multiple mounting grooves and auxiliary rings. The thickness of the multiple mounting grooves gradually increases from the Y-shaped dustproof part towards the longitudinal clearance groove, and the thickness of the auxiliary ring changes in the same way as the thickness of the mounting groove.

[0011] For example, at least one embodiment of this disclosure provides a dustproof oil seal in which the longitudinal clearance groove has an inlet and an outlet, and both sides of the inlet and outlet have arc-shaped guide surfaces.

[0012] For example, at least one embodiment of this disclosure provides a dustproof oil seal, wherein the Y-shaped dustproof part has a first abutting part and a second abutting part, a dustproof space is formed between the first abutting part and the second abutting part, and the sum of the thicknesses of the first abutting part and the second abutting part is less than the thickness of the annular ring.

[0013] For example, at least one embodiment of this disclosure provides a dustproof oil seal, wherein the first abutting portion is used to abut against the piston, the second abutting portion is used to abut against the inner wall of the oil cylinder, and the height of the first abutting portion is higher than the height of the second abutting portion.

[0014] For example, at least one embodiment of this disclosure provides a dustproof oil seal in which the ends of the first abutting portion and the second abutting portion both have arc-shaped abutting surfaces.

[0015] For example, at least one embodiment of this disclosure provides a dustproof oil seal in which the thickness of the mounting groove is less than half the thickness of the positioning groove.

[0016] For example, at least one embodiment of this disclosure provides a dustproof oil seal, wherein the auxiliary ring has a guide bevel for guiding the installation of the annular ring.

[0017] For example, at least one embodiment of this disclosure provides a dustproof oil seal in which the auxiliary ring has a notch, and the notches of a plurality of the auxiliary rings are staggered.

[0018] For example, at least one embodiment of this disclosure provides a dustproof oil seal, wherein the Y-shaped dustproof part is an elastic dustproof part.

[0019] The beneficial effects of the embodiments disclosed herein are as follows:

[0020] In this disclosure, an auxiliary ring is installed within the mounting groove and works in conjunction with the annular ring. The thickness of the auxiliary ring is equal to the sum of the width of the longitudinal clearance groove, the thickness of the mounting groove, and the thickness of the positioning groove. This allows the auxiliary ring to tightly fill the corresponding space, mate with the positioning groove of the piston, and form a good sealing effect. Simultaneously, the longitudinal clearance groove provides the auxiliary ring with a certain deformation space under pressure, enabling it to better adapt to the movement of the piston, further enhancing the sealing performance, effectively preventing hydraulic oil leakage, and ensuring the working efficiency and stability of the cylinder. When the hydraulic medium pushes the piston, the hydraulic medium enters the longitudinal clearance groove, causing the side walls of the longitudinal clearance groove to expand to both sides, ensuring a better sealing effect. The mating of the positioning groove on the piston with the auxiliary ring and the annular ring provides a clear positioning method for the installation of the dust seal. During installation, simply align the auxiliary ring with the positioning groove of the piston and install it in place, then match the mounting groove on the inner wall of the annular ring with the position of the auxiliary ring to complete accurate installation, reducing adjustment time during installation and improving installation efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of one embodiment of the present disclosure;

[0023] Figure 2 for Figure 1 The schematic diagram shows the structure after the piston is hidden in the embodiment.

[0024] In the diagram: Piston-001, Positioning groove-002, Annular ring-1, Y-shaped dustproof part-101, Longitudinal clearance groove-102, Mounting groove-103, Inlet / outlet-104, Arc-shaped guide surface-105, First abutment part-106, Second abutment part-107, Arc-shaped abutment surface-108, Auxiliary ring-2, Guide slope-201, Notch-202. Detailed Implementation

[0025] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0026] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0027] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0028] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, 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 disclosure.

[0030] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] like Figures 1-2As shown, a dustproof oil seal is provided in one embodiment of the present disclosure for sealing between a cylinder piston 001 and the inner wall of the cylinder. The piston 001 has a positioning groove 002 and includes an annular ring 1. One end of the annular ring 1 has a Y-shaped dustproof part 101, and the other end of the annular ring 1 has a longitudinal clearance groove 102. The inner wall of the annular ring 1 has a mounting groove 103, which is located on the outer side of the longitudinal clearance groove 102 near the piston 001. An auxiliary ring 2 is provided in both the mounting groove 103 and the positioning groove 002. The thickness of the auxiliary ring 2 is equal to the sum of the width of the longitudinal clearance groove 102, the thickness of the mounting groove 103, and the thickness of the positioning groove 002.

[0032] The Y-shaped dustproof part 101 is designed at one end of the annular ring 1. The Y-shaped structure can effectively prevent dust, impurities and other contaminants from entering the gap between the oil cylinder and the piston 001. The opening of the Y-shape can fit tightly against the surface of the piston 001. During the reciprocating motion of the piston 001, it acts like a brush to scrape off the dust and other contaminants adhering to the inner wall of the oil cylinder, preventing them from entering the oil cylinder. This protects the hydraulic components connected to the oil cylinder and extends the service life of the relevant components of the hydraulic system.

[0033] The auxiliary ring 2 is installed in the mounting groove 103 and works in conjunction with the annular ring 1. The thickness of the auxiliary ring 2 is equal to the sum of the width of the longitudinal clearance groove 102, the thickness of the mounting groove 103, and the thickness of the positioning groove 002. This allows the auxiliary ring 2 to tightly fill the corresponding space and cooperate with the positioning groove 002 of the piston 001 to form a good sealing effect. At the same time, the longitudinal clearance groove 102 provides a certain deformation space for the auxiliary ring 2 under pressure, allowing it to better adapt to the movement of the piston 001, further enhancing the sealing performance, effectively preventing hydraulic oil leakage, and ensuring the working efficiency and stability of the cylinder. When the hydraulic medium pushes the piston 001 to move, the hydraulic medium enters the longitudinal clearance groove 102, causing the two side walls of the longitudinal clearance groove 102 to expand to both sides to ensure a better sealing effect. The cooperation between the positioning groove 002 on the piston 001, the auxiliary ring 2, and the annular ring 1 provides a clear positioning method for the installation of the dustproof oil seal. During installation, simply align the auxiliary ring 2 with the positioning groove 002 of the piston 001 and install it in place. Then, match the mounting groove 103 on the inner wall of the ring 1 with the position of the auxiliary ring 2 to complete the accurate installation. This reduces the adjustment time during the installation process and improves the installation efficiency.

[0034] like Figures 1-2 As shown, in some examples, there are several mounting grooves 103 and auxiliary rings 2. The thickness of the several mounting grooves 103 gradually increases from the Y-shaped dustproof part 101 towards the longitudinal clearance groove 102. The thickness of the auxiliary ring 2 changes in the same way as the thickness of the mounting groove 103.

[0035] When the hydraulic cylinder is working, the hydraulic pressure is not uniformly distributed on the contact surface between the piston 001 and the oil seal; the pressure is relatively higher near the inside of the cylinder. This gradually thickened design allows the auxiliary ring 2 to better adapt to pressure changes, providing thicker sealing support in areas of higher pressure, enhancing the sealing effect and effectively preventing hydraulic oil leakage. In high-pressure hydraulic cylinders, the closer to the inside of the cylinder, the greater the pressure on the oil seal. The gradually thickened auxiliary ring 2 can fit more tightly against the piston 001, resisting the impact of high-pressure hydraulic fluid and ensuring the reliability of the seal. The arrangement of multiple mounting grooves 103 and auxiliary rings 2 forms multiple sealing defenses. Each auxiliary ring 2, in conjunction with its corresponding mounting groove 103, can play a certain role in preventing oil leakage. Even if a slight leak occurs in one seal, the subsequent sealing structure can still continue to function, greatly improving the overall sealing performance and ensuring the stable operation of the hydraulic cylinder.

[0036] The mounting grooves 103 and auxiliary rings 2 of different thicknesses can more evenly distribute friction and pressure during the reciprocating motion of the piston 001. The thicker auxiliary ring 2 can withstand greater pressure while also transmitting the force more evenly to the annular ring 1, preventing deformation or damage to the annular ring 1 due to excessive local stress.

[0037] like Figures 1-2 As shown, in some examples, the longitudinal clearance groove 102 has an inlet 104, and both sides of the inlet 104 have arc-shaped guide surfaces 105.

[0038] When piston 001 moves, inlet 104 allows hydraulic medium to enter longitudinal relief groove 102. As hydraulic medium flows in, the sidewalls of longitudinal relief groove 102 expand. This design allows the dust seal to automatically adjust its sealing state according to pressure changes generated during piston 001 movement. Under high-pressure conditions, more hydraulic medium enters longitudinal relief groove 102, causing the sidewalls to expand further, thereby enhancing the clamping force on cylinder piston 001 and ensuring good sealing performance under high pressure, effectively preventing hydraulic oil leakage.

[0039] The expansion of the sidewall of the longitudinal clearance groove 102 allows it to better fit the irregularities on the surface of the piston 001. Even if the piston 001 has minor surface unevenness during processing, or local wear occurs after long-term use, the expanded sidewall can fill these gaps, maintain tight sealing contact, improve the sealing effect, and ensure the stable operation of the cylinder under different working conditions.

[0040] As the hydraulic fluid enters the longitudinal clearance groove 102, it can carry away some of the heat generated by the movement and friction of the piston 001. This helps to reduce the operating temperature of the dust seal, slows down the aging of the sealing material, and further extends the service life of the dust seal. Especially in high-speed or high-load cylinder operating scenarios, heat dissipation is crucial for maintaining sealing performance.

[0041] When the dustproof oil seals adhere to each other on both sides of the longitudinal relief groove 102, the hydraulic medium can flow into the longitudinal relief groove 102 under the action of the arc-shaped guide surface 105, thus ensuring the service life of the longitudinal relief groove 102.

[0042] like Figures 1-2 As shown, in some examples, the Y-shaped dustproof part 101 has a first abutting part 106 and a second abutting part 107, and a dustproof space is formed between the first abutting part 106 and the second abutting part 107. The sum of the thicknesses of the first abutting part 106 and the second abutting part 107 is less than the thickness of the annular ring 1.

[0043] When the surfaces of the first contact portion 106 and the second contact portion 107 come into contact with the piston 001, their flexibility allows them to fill in the uneven areas on the piston 001's surface. This not only increases the contact area and more effectively blocks tiny particles such as dust, but also creates numerous microscopic sealing areas, making it difficult for dust to pass through. Even extremely fine dust particles, after being initially blocked by the first contact portion 106 and entering the dustproof space, will be further intercepted by the second contact portion 107, making it difficult for them to break through the defenses and enter the cylinder.

[0044] As the piston 001 reciprocates, the first contact portion 106 and the second contact portion 107 undergo periodic deformation and recovery. When the piston 001 extends outward from the cylinder, the dustproof space expands, allowing external contaminants to enter, but the blocking effect of the first contact portion 106 is more significant at this time. When the piston 001 retracts into the cylinder, the dustproof space contracts, the internal pressure increases, and some of the contaminants that have already entered are squeezed out, further enhancing the self-cleaning ability and improving the efficiency of dynamic dust prevention.

[0045] Since the sum of the thicknesses of the first abutment portion 106 and the second abutment portion 107 is less than the thickness of the annular ring 1, they are more prone to elastic deformation when subjected to external forces. This elastic deformation makes the stress distribution more uniform during the stress process, reduces local stress concentration, and extends the fatigue life of the first abutment portion 106 and the second abutment portion 107.

[0046] The thinner first abutment portion 106 and the second abutment portion 107 form a complementary structural relationship with the annular ring 1. When subjected to external forces, they can work together to share and disperse the force. This synergistic effect enhances the integrity of the entire dustproof oil seal structure, enabling it to maintain a stable shape and performance when facing complex and variable external forces, and making it less prone to local deformation or damage.

[0047] like Figures 1-2 As shown, in some examples, the first abutment 106 is used to abut against the piston 001, and the second abutment 107 is used to abut against the inner wall of the cylinder. The height of the first abutment 106 is higher than the height of the second abutment 107.

[0048] The first contact portion 106 abuts against the piston 001, and the second contact portion 107 abuts against the inner wall of the cylinder, forming two tight sealing lines. The first contact portion 106, through its contact with the piston 001, effectively prevents hydraulic oil leakage between the piston 001 and the oil seal, while also preventing contaminants that may be carried by the piston 001 during its movement from entering the oil seal. The second contact portion 107, in close contact with the inner wall of the cylinder, further prevents external contaminants from intruding through the gap between the inner wall of the cylinder and the oil seal, and also helps prevent hydraulic oil leakage along the inner wall of the cylinder. This double-sealing structure greatly improves the sealing performance of the dustproof oil seal, ensuring the stable operation of the hydraulic system inside the cylinder.

[0049] The height of the first abutment portion 106 is higher than that of the second abutment portion 107. This height difference helps optimize the structure of the dustproof space. When contaminants attempt to enter the oil seal, the higher first abutment portion 106 first intercepts most of the contaminants. The contaminants then enter the dustproof space, where they are blocked by the second abutment portion 107 and cannot penetrate further. The first abutment portion 106 directly abuts against the piston 001, allowing it to better follow the movement of the piston 001. During the reciprocating motion of the piston 001, the first abutment portion 106 can flexibly adjust its contact with the piston 001 according to the piston 001's speed, acceleration, and stroke changes, always maintaining a good sealing and dustproof effect. Its higher height provides a larger contact area and deformation space, ensuring that it can still tightly fit the piston 001 even when the piston 001 moves rapidly or is under high pressure, preventing hydraulic oil leakage and contaminant intrusion.

[0050] like Figures 1-2 As shown, in some examples, the ends of the first abutment portion 106 and the second abutment portion 107 both have arc-shaped abutment surfaces 108.

[0051] The curved contact surface 108 better adapts to the surface curvature of the piston 001 and the inner wall of the cylinder. Compared with a flat contact surface, the curved contact surface 108 makes a tighter contact with the piston 001 and the inner wall of the cylinder, effectively filling tiny gaps and reducing the possibility of hydraulic oil leakage. The piston 001 may have slight cylindricity errors during manufacturing; the curved contact surface 108 can adapt to these errors, ensuring a good seal throughout the entire circumference. In terms of dust prevention, the tight contact more effectively prevents dust, impurities, and other contaminants from entering, improving the dustproof effect.

[0052] When piston 001 moves, the arc-shaped contact surface 108 oscillates slightly relative to piston 001 and the inner wall of the cylinder. This arc-shaped structure helps guide the flow direction of contaminants. When contaminants come into contact with the arc-shaped contact surface 108, they are guided along the arc-shaped surface to a position where they are more easily discharged, enhancing the self-cleaning ability of the dustproof space.

[0053] like Figures 1-2 As shown, in some examples, the thickness of the mounting groove 103 is less than half the thickness of the positioning groove 002.

[0054] The thinner mounting groove 103 allows the auxiliary ring 2 installed within it to more easily undergo elastic deformation towards the positioning groove 002 when subjected to pressure. When the hydraulic medium in the cylinder acts on the auxiliary ring 2 through the side wall pressure of the longitudinal clearance groove 102, the thinner mounting groove 103 allows the auxiliary ring 2 to have greater deformation space, enabling it to more tightly fill the gap between the positioning groove 002 and the mounting groove 103, enhancing the sealing effect and effectively preventing hydraulic oil leakage.

[0055] The thinner mounting groove 103 reduces installation difficulty. When installing the auxiliary ring 2, its smaller thickness makes it easier to accurately place the auxiliary ring 2 into the mounting groove 103 and align it with the positioning groove 002, reducing the number of adjustments required during installation and improving installation efficiency. At the same time, the thinner mounting groove 103 also makes it easier for installers to observe and judge whether the installation position of the auxiliary ring 2 is correct during installation.

[0056] When maintenance or replacement of the auxiliary ring 2 is required, the thinner mounting groove 103 makes it easier to remove the auxiliary ring 2 from the mounting groove 103. Compared to the thicker mounting groove 103, the thinner structure reduces the resistance and interference that may be encountered when removing the auxiliary ring 2, reduces the difficulty of maintenance, shortens the maintenance time, and improves the maintainability of the equipment.

[0057] This thickness design optimizes the structural layout between the annular ring 1, the auxiliary ring 2, and the piston 001. The thinner mounting groove 103 and the relatively thicker positioning groove 002 form a reasonable combination, making the dust seal more compact and space-efficient while meeting sealing performance requirements, which is beneficial for applications under different space constraints.

[0058] like Figures 1-2 As shown, in some examples, the auxiliary ring 2 has a guide ramp 201 for guiding the installation of the annular ring 1.

[0059] The guide ramp 201 provides a clear guiding direction for the installation of the ring 1. During installation, the installer only needs to align the ring 1 with the guide ramp 201 of the auxiliary ring 2 to easily and accurately install the ring 1 into the designated position along the direction of the guide ramp. This avoids possible misalignment or deviation between the ring 1 and the auxiliary ring 2 during installation, greatly saving installation time and improving installation efficiency.

[0060] The guide ramp 201 guides the installation of the annular ring 1, enabling it to more precisely mate with the auxiliary ring 2. As the annular ring 1 is installed along the guide ramp 201, it gradually comes into close contact with the auxiliary ring 2, ensuring a uniform sealing gap between them that meets design requirements. This tight and uniform fit helps improve the sealing performance of the dust seal, effectively preventing hydraulic oil leakage and ensuring the normal operation of the cylinder system.

[0061] like Figures 1-2 As shown, in some examples, the auxiliary ring 2 has a notch 202, and the notches 202 of several auxiliary rings 2 are staggered.

[0062] The presence of notch 202 allows the auxiliary ring 2 to undergo a certain degree of elastic deformation under pressure. When the pressure inside the cylinder changes, the auxiliary ring 2 can better adapt to the pressure through the deformation of notch 202, forming a tighter fit with the piston 001 and the annular ring 1, thereby enhancing the sealing effect. Under high-pressure conditions, the auxiliary ring 2 will deform towards notch 202 due to pressure, further filling the sealing gap and preventing hydraulic oil leakage.

[0063] The notches 202 of several auxiliary rings 2 are staggered, allowing the auxiliary rings 2 at different positions to complement each other for sealing. Even if a minor leak occurs at the notch 202 of one auxiliary ring 2, the staggered notches of adjacent auxiliary rings 2 can still continue to provide a sealing effect, forming a multi-layered sealing defense line and effectively improving the overall sealing performance.

[0064] The notch 202 reduces the difficulty of installing the auxiliary ring 2. During installation, installers can use the notch 202 to more easily insert the auxiliary ring 2 into the mounting slot 103, especially in confined spaces or when operation is inconvenient, the notch 202 provides a more flexible installation method. At the same time, the notch 202 also helps installers to position and adjust the auxiliary ring 2 during installation, improving installation efficiency.

[0065] When the auxiliary ring 2 needs to be disassembled for maintenance or replacement, the notch 202 provides a leverage point for the disassembly tool. Installers can more easily apply force through the notch 202 to remove the auxiliary ring 2 from the mounting slot 103, reducing the risk of damage during disassembly and improving the convenience of maintenance.

[0066] like Figures 1-2 Figures 1-2 As shown, in some examples, the Y-shaped dustproof part 101 is an elastic dustproof part.

[0067] The elastic material allows the Y-shaped dustproof part 101 to adaptively adjust its contact with the piston 001 according to the surface condition and movement of the piston 001. Even if the piston 001 has minor manufacturing errors, wear, or deformation during movement, the elastic Y-shaped dustproof part 101 can always maintain a tight fit, leaving no gaps for dust, impurities, or other contaminants to enter, effectively preventing them from intruding into the cylinder. For example, in some older equipment, the piston 001 may have an uneven surface due to long-term use, but the elastic Y-shaped dustproof part 101 can still maintain a good dustproof effect.

[0068] When piston 001 moves, it experiences forces in different directions, which may cause slight positional shifts. The elastic Y-shaped dustproof part 101 can follow the dynamic changes of piston 001, adjusting the sealing position in a timely manner to maintain a good sealing condition and prevent hydraulic oil leakage. In high-frequency reciprocating motion hydraulic cylinder applications, this improvement in dynamic sealing performance is particularly critical, ensuring reliable sealing throughout the frequent movement of piston 001.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A dustproof oil seal for sealing between a cylinder piston (001) and the inner wall of a cylinder, said piston (001) having a positioning groove (002), characterized in that, include: An annular ring (1), one end of which has a Y-shaped dustproof part (101), and the other end of which has a longitudinal relief groove (102). The inner wall of the annular ring (1) has a mounting groove (103), which is located on the outer side of the longitudinal relief groove (102) near the piston (001). An auxiliary ring (2) is provided in both the mounting groove (103) and the positioning groove (002). The thickness of the auxiliary ring (2) is equal to the sum of the width of the longitudinal clearance groove (102), the thickness of the mounting groove (103), and the thickness of the positioning groove (002).

2. The dustproof oil seal according to claim 1, characterized in that, There are several mounting grooves (103) and several auxiliary rings (2). The thickness of the several mounting grooves (103) gradually increases from the Y-shaped dustproof part (101) towards the longitudinal clearance groove (102). The thickness of the auxiliary ring (2) changes in the same way as the thickness of the mounting groove (103).

3. The dustproof oil seal according to claim 1, characterized in that, The longitudinal clearance groove (102) has an inlet (104), and both sides of the inlet (104) have arc-shaped guide surfaces (105).

4. The dustproof oil seal according to claim 1, characterized in that, The Y-shaped dustproof part (101) has a first abutting part (106) and a second abutting part (107), and a dustproof space is formed between the first abutting part (106) and the second abutting part (107). The sum of the thicknesses of the first abutting part (106) and the second abutting part (107) is less than the thickness of the annular ring (1).

5. A dustproof oil seal according to claim 4, characterized in that, The first abutting part (106) is used to abut against the piston (001), and the second abutting part (107) is used to abut against the inner wall of the cylinder. The height of the first abutting part (106) is higher than the height of the second abutting part (107).

6. A dustproof oil seal according to claim 4, characterized in that, Both the first abutting part (106) and the second abutting part (107) have arc-shaped abutting surfaces (108) at their ends.

7. A dustproof oil seal according to claim 1, characterized in that, The thickness of the mounting groove (103) is less than half the thickness of the positioning groove (002).

8. A dustproof oil seal according to claim 1, characterized in that, The auxiliary ring (2) has a guide slope (201) for guiding the installation of the annular ring (1).

9. A dustproof oil seal according to claim 1, characterized in that, The auxiliary ring (2) has a notch (202), and the notches (202) of the plurality of auxiliary rings (2) are staggered.

10. A dustproof oil seal according to claim 1, characterized in that, The Y-shaped dustproof part (101) is an elastic dustproof part.

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