Sealing ring, hydraulic oil cylinder and vehicle

Abstract

The utility model provides a seal ring, hydraulic oil cylinder and vehicle relates to hydraulic seal technical field, seal ring includes connecting portion and set up outer lip and inner lip at the same end of connecting portion, outer lip and inner lip between form deformation clearance, one side surface of outer lip departing from inner lip is at least equipped with first convex rib and second convex rib, and the first convex rib and second convex rib are equipped with first convex rib and second convex rib. The first convex ribs and the second convex ribs are arranged at intervals in the axial direction of the sealing ring. According to the sealing ring, the first convex rib and the second convex rib mutually prevent dust, foreign matter is prevented from entering a sealing area of the outer lip and an external structure to cause sealing failure of the outer lip, meanwhile, the double convex ribs are arranged on the outer lip, the sealing performance and foreign matter resistance robustness of the sealing ring are improved, and the service life of the sealing ring is prolonged. According to the sealing ring, a lip structure does not need to be arranged on one side of the abutting plane for sealing, and therefore it is guaranteed that the size of the sealing ring is small while the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic sealing, in particular to a sealing ring, a hydraulic oil cylinder and a vehicle. Background Art

[0002] At present, the hydraulic cylinders used in heavy hydraulic presses all use rubber seals, such as sealing ring structures, which ensure the sealing effect through the sealing ring, piston rod and cylinder head. However, there is a risk of impurities entering the sealing area of ​​the sealing ring. As the piston rod moves, impurities will be stuck on the lip of the sealing ring or even damage the lip, causing leakage, thereby reducing the system function of the cylinder sealing structure and the sealing performance.

[0003] In order to ensure the sealing effect, for sealing rings with poor sealing and foreign body resistance, the relevant technology will set the sealing ring to a two-way lip sealing structure, that is, lips are set on both axial sides of the sealing ring, so as to improve the sealing effect. However, this setting method will cause the installation size of the sealing ring to increase, and the system space of the hydraulic cylinder is insufficient. Utility Model Content

[0004] The utility model provides a sealing ring, a hydraulic oil cylinder and a vehicle, which can improve the sealing performance and foreign body resistance robustness of the sealing ring and ensure that the size of the sealing ring is small.

[0005] In a first aspect, an embodiment of the utility model provides a sealing ring, wherein the sealing ring comprises:

[0006] Connecting part;

[0007] An outer lip and an inner lip are arranged at the same end of the connecting portion, and a deformation gap is formed between the outer lip and the inner lip;

[0008] Wherein, a surface of the outer lip facing away from the inner lip is provided with at least a first convex rib and a second convex rib, and the first convex rib and the second convex rib are arranged at intervals along the axial direction of the sealing ring.

[0009] In the sealing ring of the embodiment of the utility model, the first convex rib plays the role of a dustproof rib. When foreign matter enters the sealing area between the outer lip and the external structure, the first convex rib blocks the foreign matter outside the second convex rib to prevent damage to the second convex rib. Even if the first convex rib is deformed or damaged by the foreign matter, the second convex rib can effectively provide a sealing effect, thereby preventing the foreign matter from entering and causing the outer lip of the sealing ring to fail to seal. Similarly, the second convex rib can block the foreign matter outside the first convex rib to prevent damage to the first convex rib. Even if the second convex rib is deformed or damaged by the foreign matter, the first convex rib can effectively provide a sealing effect, thereby making the first convex rib and the second convex rib serve as dustproof lips for each other.

[0010] At the same time, by setting double ribs on the outer lip, the sealing performance and robustness against foreign matter of the sealing ring are improved, and there is no need to set a lip structure on one side of the abutting plane for sealing. In this way, the axial dimension of the sealing ring is avoided from increasing, and a sealing ring with a single lip and double ribs is formed, which improves the sealing effect while ensuring that the size of the sealing ring is small.

[0011] According to some embodiments of the present application, a surface of the outer lip facing away from the deformation gap is a dynamic sealing surface, and the first rib and the second rib are arranged to protrude radially of the sealing ring relative to the dynamic sealing surface.

[0012] According to some embodiments of the present application, the first rib and the second rib extend along the circumference of the sealing ring.

[0013] According to some embodiments of the present application, the outer edge of the first rib is an arc surface extending along the axial direction of the sealing ring, and / or the outer edge of the second rib is an arc surface extending along the axial direction of the sealing ring.

[0014] According to some embodiments of the present application, the connecting portion and the inner lip are arranged to form a through hole, and the surface of the through hole formed by the inner lip is coplanar with the surface of the through hole formed by the connecting portion, and extends along the axial direction of the sealing ring.

[0015] According to some embodiments of the present application, the inner lip is provided with a third rib on an axial end surface of the sealing ring.

[0016] According to some embodiments of the present application, the third rib is semi-spherical, and along the circumference of the sealing ring, a plurality of the third ribs are spaced apart on the surface of one end of the inner lip in the axial direction of the sealing ring.

[0017] According to some embodiments of the present application, the connecting portion further includes a transition surface, which faces the deformation gap and is connected between the outer lip and the inner lip.

[0018] In a second aspect, a hydraulic cylinder is provided, comprising a cylinder body, a cylinder cover, a piston rod and any one of the sealing rings described above, wherein the cylinder cover is fitted on both ends of the cylinder body and defines a closed space with the cylinder body;

[0019] The piston rod is inserted into the enclosed space and is movably arranged relative to the cylinder body, the sealing ring is sleeved on the outer periphery of the piston rod and is located between the piston rod and the cylinder cover, and the opening of the deformation gap faces the enclosed space;

[0020] The side of the outer lip facing away from the inner lip is in contact with the cylinder head, and the side surface of the inner lip facing away from the outer lip is in contact with the piston rod.

[0021] In a third aspect, a vehicle is provided, comprising the hydraulic cylinder in the above embodiment.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of a sealing ring according to an embodiment of the utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the middle sealing ring from another perspective;

[0026] Figure 3 for Figure 1 A schematic cross-sectional view of the middle sealing ring;

[0027] Figure 4 for Figure 1 A partial cross-sectional diagram of the middle sealing ring;

[0028] Figure 5 The utility model is a cross-sectional structural schematic diagram of a hydraulic cylinder according to another embodiment.

[0029] Figure Number:

[0030] 1000, hydraulic cylinder;

[0031] 100, sealing ring; 10, connecting portion; 11, abutting plane; 12, transition surface; 20, outer lip; 20a, dynamic sealing surface; 21, first convex rib; 22, second convex rib; 30, inner lip; 30a, static sealing surface; 31, third convex rib; 40, deformation gap; 50, penetration hole;

[0032] 200, cylinder body; 210, enclosed space; 300, cylinder head; 400, piston rod; L, axial direction; Z, circumferential direction; J, radial direction. DETAILED DESCRIPTION

[0033] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0035] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0036] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0038] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0039] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", and "fixation" should be understood in a broad sense, for example, they can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0040] In vehicles, hydraulic cylinders are hydraulic actuators that convert hydraulic energy into mechanical energy and perform linear reciprocating motion (or swinging motion). They have a simple structure and reliable operation. When using them to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the movement is smooth. Therefore, they are widely used in the hydraulic systems of various machines.

[0041] The hydraulic cylinder is composed of a cylinder body and a cylinder head, a piston and a piston rod, and a sealing device. The main part of the hydraulic cylinder is composed of a cylinder body, a cylinder head, and a piston. The cylinder head is installed at both ends of the hydraulic cylinder to form a tight oil chamber with the cylinder barrel to withstand the pressure of the hydraulic oil. The inner hole of the cylinder body is usually precision-processed, such as boring, grinding, lapping or rolling, to ensure that the piston and piston rod can slide smoothly and reduce wear. The piston is the main component that converts hydraulic energy into mechanical energy, and its effective working area directly affects the force and movement speed of the hydraulic cylinder. The piston can be single-acting or double-acting. When the hydraulic cylinder is working, the piston rod slides in the cylinder body under the action of thrust, tension, etc. Generally, a sealing structure is provided between the piston rod and the cylinder head to ensure the sealing of the hydraulic cylinder.

[0042] The sealing structure plays a vital role in the hydraulic cylinder. It is mainly used to prevent the leakage of the working medium and the intrusion of external dust. There are many types of sealing rings in the hydraulic cylinder, including O-rings, X-type dust rings, Y-type sealing rings, etc. Each type of sealing ring has its specific purpose and installation method. For example, the elastic force generated by the elastic deformation of the O-ring squeezes the sliding ring seal to form additional contact stress, thereby achieving a sealing effect.

[0043] In the related art, hydraulic cylinders generally use Y-shaped sealing rings, one end of which is provided with a sealing lip, which ensures the sealing between the piston rod and the cylinder head to prevent oil leakage from the cylinder body. However, there is a risk of impurities entering the sealing area of ​​the sealing ring. As the piston rod moves, the impurities will be stuck in the lip of the sealing ring or even damage the lip, causing leakage, thereby reducing the system function of the cylinder sealing structure and the sealing performance.

[0044] In the related art, in order to ensure the sealing effect, the traditional sealing ring has a lip on the side with poor sealing and foreign body resistance. In the related art, the sealing ring is set to a two-way lip sealing structure to form an X-shaped dust ring, that is, lips are set on both axial sides of the sealing ring, thereby improving the sealing effect. However, this setting method will cause the required installation size of the sealing ring to increase, and the system space of the hydraulic cylinder is insufficient, which will cause assembly problems.

[0045] Based on this, the present application provides a sealing ring 100 with a smaller size while being able to improve sealing performance and robustness against foreign matter. The sealing ring 100 can be used in the above-mentioned hydraulic cylinder or in other environments to provide a sealing effect.

[0046] Specifically, see Figures 1 to 4The sealing ring 100 includes a connecting portion 10 and an outer lip 20 and an inner lip 30 arranged at the same end of the connecting portion 10, the other end of the connecting portion 10 forms an abutting plane 11, and a deformation gap 40 is formed between the outer lip 20 and the inner lip 30, wherein a side surface of the outer lip 20 away from the inner lip 30 is provided with at least a first convex rib 21 and a second convex rib 22, and the first convex rib 21 and the second convex rib 22 are arranged at intervals along the axial direction L of the sealing ring 100.

[0047] Specifically, the deformation gap 40 refers to an open space formed between at least a portion of the inner lip 30 and at least a portion of the outer lip 20 and facing the outside of the sealing ring 100, thereby forming a lip for the sealing ring 100 to achieve sealing. Specifically, in the axial direction L of the sealing ring 100, the connecting portion 10 has abutting planes 11 and connecting planes facing each other, one end of the outer lip 20 and the inner lip 30 are connected to the connecting plane, and the other ends are away from each other, thereby forming a deformation gap 40 at the end of the outer lip 20 and the inner lip 30 away from each other. Generally, the lip of the sealing ring 100 (i.e., the deformation gap 40) is sleeved in the external structure facing the high-pressure side. When the outer lip 20 and / or the inner lip 30 are not subjected to pressure, there is no pressure in the deformation gap 40. At this time, the outer lip 20 and / or the inner lip 30 are not subjected to force and cannot fit tightly to the external structure. When the outer lip 20 and / or the inner lip 30 are subjected to pressure, high pressure is formed in the deformation gap 40 and squeezes the outer lip 20 and / or the inner lip 30 in a direction away from each other, so that the outer lip 20 and / or the inner lip 30 fits tightly with the external structure to form a seal, thereby achieving high-pressure sealing.

[0048] It can be understood that the size of the deformation gap 40 can be specifically set according to the specifications of the sealing ring 100 and the dimensions of the outer lip 20 and the inner lip 30 in the axial direction L of the sealing ring 100, and the present application does not limit this.

[0049] The first rib 21 is a protruding structure formed on the side surface of the outer lip 20 away from the inner lip 30 toward the side away from the inner lip 30. Similarly, the second rib 22 is a protruding structure formed on the side surface of the outer lip 20 away from the inner lip 30 toward the side away from the inner lip 30, so that the outer lip 20 abuts against the external structure through the first rib 21 to form a line seal. Similarly, the outer lip 20 abuts against the external structure through the second rib 22 to form a line seal, thereby increasing the local sealing stress of the outer lip 20 and improving the sealing performance.

[0050] Furthermore, the first rib 21 and the second rib 22 are arranged at intervals along the axial direction L of the sealing ring 100, so that the first rib 21 plays the role of a dustproof rib. When foreign matter enters the sealing area between the outer lip 20 and the external structure, the first rib 21 blocks the foreign matter outside the second rib 22 to prevent damage to the second rib 22. Even if the first rib 21 is deformed or damaged by the foreign matter, the second rib 22 can effectively provide a sealing effect, thereby preventing the foreign matter from entering and causing the sealing failure of the outer lip 20 of the sealing ring 100. Similarly, the second rib 22 can block the foreign matter outside the first rib 21 to prevent damage to the first rib 21. Even if the second rib 22 is deformed or damaged by the foreign matter, the first rib 21 can effectively provide a sealing effect, so that the first rib 21 and the second rib 22 are dustproof lips for each other.

[0051] At the same time, by providing double ribs on the outer lip 20, the sealing performance and robustness against foreign matter of the sealing ring 100 are improved, and there is no need to provide a lip structure on one side of the abutting plane 11 for sealing. In this way, the axial L dimension of the sealing ring 100 is avoided from increasing, and a sealing ring 100 with a single lip and double ribs is formed, so as to improve the sealing effect while ensuring that the size of the sealing ring 100 is small.

[0052] In one embodiment, the first convex rib 21 and the second convex rib 22 may have the same or different structural sizes and protrusions, which may be specifically configured according to actual conditions, and the present application does not limit this. Specifically, the first convex rib 21 and the second convex rib 22 extend along the circumferential direction Z of the sealing ring 100 to form an annular structure.

[0053] In one embodiment, the surface of the outer lip 20 facing away from the deformation gap 40 is a dynamic sealing surface 20 a , and the first convex rib 21 and the second convex rib 22 are arranged to protrude relative to the dynamic sealing surface 20 a along the radial direction of the sealing ring 100 .

[0054] Under the premise that no rib structure is provided on the dynamic sealing surface 20a, the deformation of the outer lip 20 causes surface fitting between the dynamic sealing surface 20a and the external structure, and the sealing stress is poor, thereby resulting in poor sealing performance. Therefore, the present application forms a first rib 21 and a second rib 22 by protruding outward at least two places on the dynamic sealing surface 20a. The outer lip 20 is deformed so that a small area of ​​fitting is formed between the first rib 21 and the second rib 22 and the external structure, thereby converting the fitting between the outer lip 20 and the external structure from surface fitting to line fitting, thereby improving the sealing effect.

[0055] At the same time, when either the second rib 22 or the first rib 21 is deformed by impurities entering the sealing area between the dynamic sealing surface 20a and the external structure and loses its sealing effect, the other can still continue to provide sealing. This allows the sealing ring 100 provided in the present application to have a good dynamic sealing effect without increasing the axial L dimension of any of the outer lip 20, the inner lip 30 and the connecting portion 10.

[0056] In practical applications, the inner lip 30 forms a structure on the inner side of the sealing ring 100, which contacts the shaft or hole and forms a seal. Figure 5 The piston rod 400 in the sealing ring contacts to form a seal, and the outer lip 20 forms a structure outside the sealing ring 100, while supporting the inner lip 30, forming a dynamic lip, that is, a deformable lip. When the sealing ring 100 is subjected to force, the outer lip 20 deforms to form a seal with the external structure, such as Figure 5 The cylinder head 300 forms a seal.

[0057] In one embodiment, the connection portion 10 and the inner lip 30 surround a through hole 50 , and a surface of the inner lip 30 facing the through hole 50 is coplanar with a surface of the connection portion 10 facing the through hole 50 and extends along the axial direction L of the sealing ring 100 .

[0058] The surface of the inner lip 30 surrounding the penetration hole 50 and the surface of the connecting portion 10 surrounding the penetration hole 50 together form a static sealing surface 30a. At this time, the static sealing surface 30a is a straight surface without any bends, and the static sealing surface 30a extends up and down along the axial direction L of the sealing ring 100. When the external shaft is penetrated in the penetration hole 50 along the axial direction L of the sealing ring 100, all areas of the static sealing surface 30a can be evenly fitted with the outer surface of the external structure penetrated in the penetration hole 50 to form a uniform seal between the sealing ring 100 and the external structure.

[0059] In one embodiment, the connecting portion 10 also includes a transition surface 12, which faces the deformation gap 40 and is connected between the outer lip 20 and the inner lip 30. At this time, the two surfaces of the outer lip 20 and the inner lip 30 facing each other and the transition surface 12 surround the deformation gap 40.

[0060] Specifically, the transition surface 12 is formed by a portion of the connecting plane, which corresponds to the groove bottom of the deformation gap 40. The outer lip 20 and the inner lip 30 form a groove of the deformation gap 40 on the side away from the transition surface 12. The deformation gap 40 gradually expands in the direction from the groove bottom to the groove, so that the sealing ring 100 of the present application forms a V-shaped sealing ring 100.

[0061] In one embodiment, the outer edge of the first rib 21 is an arc surface extending along the axial direction L of the sealing ring 100, and / or the outer edge of the second rib 22 is an arc surface extending along the axial direction L of the sealing ring 100, thereby facilitating the deformation of the first rib 21 and the second rib 22, thereby facilitating installation while ensuring good sealing performance.

[0062] In one of the embodiments, a third rib 31 is provided on the surface of one end of the inner lip 30 in the axial direction L of the sealing ring 100. After the sealing ring 100 is installed, one side surface of the inner lip 30 in the axial direction L abuts against the external structure through the third rib 31, so that an end of the inner lip 30 in the axial direction L of the sealing ring 100 forms an interference fit with the external structure, ensuring that the sealing ring 100 is installed in place, which can effectively enhance the sealing effect and ensure that the sealing ring 100 is installed in place.

[0063] Specifically, the third rib 31 is in a semi-spherical shape, that is, the third rib 31 is a semi-spherical structure with an arc surface formed by the surface of one end of the inner lip 30 on the axial direction L of the sealing ring 100 protruding outward, and along the circumferential direction Z of the sealing ring 100, the inner lip 30 is provided with a plurality of third ribs 31 at intervals on the surface of one end of the sealing ring 100 on the axial direction L of the sealing ring 100, thereby improving the sealing effect of the sealing ring 100 as a whole along the circumferential direction Z of the sealing ring 100.

[0064] At the same time, an empty groove is formed between every two third ribs 31. When the sealing medium leaks, each empty groove can store it, thereby further improving the sealing effect.

[0065] In some embodiments, the outer lip 20 is provided with a first convex rib 21 and a second convex rib 22, and a fourth convex rib, a fifth convex rib, etc. may also be provided on the surface thereof, and the specific number of convex ribs is not limited by the present application.

[0066] The sealing ring 100 provided in the present application has the following beneficial effects:

[0067] (1) The first rib 21 and the second rib 22 are arranged at intervals along the axial direction L of the sealing ring 100, so that the first rib 21 plays the role of a dustproof rib. When foreign matter enters the sealing area between the outer lip 20 and the external structure, the first rib 21 blocks the foreign matter outside the second rib 22 to prevent damage to the second rib 22. Even if the first rib 21 is deformed or damaged by the foreign matter, the second rib 22 can effectively provide a sealing effect, thereby preventing the foreign matter from entering and causing the sealing failure of the outer lip 20 of the sealing ring 100. Similarly, the second rib 22 can block the foreign matter outside the first rib 21 to prevent damage to the first rib 21. Even if the second rib 22 is deformed or damaged by the foreign matter, the first rib 21 can effectively provide a sealing effect, so that the first rib 21 and the second rib 22 serve as dustproof lips for each other;

[0068] (2) By providing double convex ribs on the outer lip 20, the sealing performance and robustness against foreign matter of the sealing ring 100 are improved, and there is no need to provide a lip structure on one side of the abutting plane 11 for sealing. In this way, the axial L dimension of the sealing ring 100 is avoided from increasing, and a single-lip double-convex rib sealing ring 100 is formed, so as to improve the sealing effect while ensuring that the size of the sealing ring 100 is small.

[0069] According to another aspect of the present application, a hydraulic cylinder 1000 is also provided, comprising a cylinder body 200, a cylinder head 300, a piston rod 400 and a sealing ring 100 in any of the above embodiments, the cylinder head 300 covers both ends of the cylinder body 200 and defines a closed space 210 with the cylinder body 200, the piston rod 400 is inserted into the closed space 210 and is movably arranged relative to the cylinder body 200, the sealing ring 100 is sleeved on the outer periphery of the piston rod 400 and is located between the piston rod 400 and the cylinder head 300 and the opening of the deformation gap 40 faces the closed space 210, the side of the outer lip 20 facing away from the inner lip 30 is in contact with the cylinder head 300, and the side surface of the inner lip 30 facing away from the outer lip 20 is in contact with the piston rod 400.

[0070] The sealing ring 100 provides good sealing when the piston rod 400 reciprocates relative to the cylinder body 200 and the cylinder head 300. At the same time, the sealing ring 100 of the present application has a small axial dimension L, is easy to assemble, and does not need to occupy too much assembly space.

[0071] In other embodiments, the sealing ring 100 may also be used in other high-pressure reciprocating sealing devices, and the present application does not limit this.

[0072] According to the third aspect of the present application, a vehicle is also provided, including the hydraulic cylinder 1000 in any of the above embodiments. The hydraulic cylinder 1000 is an important hydraulic component in the vehicle, which realizes the functions of force transmission, mechanical movement and control of the vehicle through the hydraulic principle. The hydraulic cylinder 1000 is widely used in engineering machinery and agricultural machinery such as excavators, loaders, cranes, forklifts, bulldozers, tank trucks, etc. In the hydraulic system, the function of the hydraulic cylinder 1000 is to convert the pressure of the hydraulic system into the linear motion of the piston rod 400, thereby driving the movement of the mechanical system.

[0073] Furthermore, the vehicle may also be a private car, such as a sedan, SUV, MPV or pickup truck, etc. The vehicle may also be an operating vehicle, such as a van, bus, small truck or large trailer, etc.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A sealing ring, characterized in that: include: Connecting part; An outer lip and an inner lip are arranged at the other end of the connecting portion, and a deformation gap is formed between the outer lip and the inner lip; Wherein, a surface of the outer lip facing away from the inner lip is provided with at least a first convex rib and a second convex rib, and the first convex rib and the second convex rib are arranged at intervals along the axial direction of the sealing ring.

2. The sealing ring according to claim 1, characterized in that: The surface of the outer lip facing away from the deformation gap is a dynamic sealing surface, and the first convex rib and the second convex rib are arranged to protrude relative to the dynamic sealing surface along the radial direction of the sealing ring.

3. The sealing ring according to claim 1, characterized in that: The first convex rib and the second convex rib extend along the circumference of the sealing ring.

4. The sealing ring according to claim 1, characterized in that: The outer edge of the first rib is an arc surface extending along the axial direction of the sealing ring, and / or the outer edge of the second rib is an arc surface extending along the axial direction of the sealing ring.

5. The sealing ring according to claim 1, characterized in that: The connecting portion and the inner lip are arranged to form a penetration hole, and the surface of the inner lip forming the penetration hole is coplanar with the surface of the connecting portion forming the penetration hole, and extends along the axial direction of the sealing ring.

6. The sealing ring according to claim 1, characterized in that: The inner lip is provided with a third rib on an axial end surface of the sealing ring.

7. The sealing ring according to claim 6, characterized in that: The third rib is in a semi-spherical shape. Along the circumference of the sealing ring, a plurality of the third ribs are provided at intervals on the surface of one end of the inner lip in the axial direction of the sealing ring.

8. The sealing ring according to claim 1, characterized in that: The connecting portion further includes a transition surface facing the deformation gap and connected between the outer lip and the inner lip.

9. A hydraulic cylinder, characterized in that: It comprises a cylinder body, a cylinder cover, a piston rod and a sealing ring as claimed in any one of claims 1 to 8, wherein the cylinder cover is fitted on both ends of the cylinder body and defines a closed space with the cylinder body; The piston rod is inserted into the enclosed space and is movably arranged relative to the cylinder body, the sealing ring is sleeved on the outer periphery of the piston rod and is located between the piston rod and the cylinder cover, and the opening of the deformation gap faces the enclosed space; The side of the outer lip facing away from the inner lip is in contact with the cylinder head, and the side surface of the inner lip facing away from the outer lip is in contact with the piston rod.

10. A vehicle, characterized in that: Including the hydraulic cylinder described in claim 9.

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