Leak-proof automobile piston rod

Abstract

The utility model relates to the technical field of automobile piston rods, and discloses an anti-leakage automobile piston rod which comprises a cylinder barrel and a piston rod body, a composite sealing piece is arranged at the position, at the penetrating-out end of the piston rod, in the cylinder barrel, and a sealing end cover for pressing and positioning the composite sealing piece is connected to the end of the cylinder barrel in a threaded and sleeved mode. An annular bearing platform connected to the bottom of the composite sealing piece in a bearing mode is installed on the inner barrel wall, close to the end, of the cylinder barrel. According to the leak-proof automobile piston rod, the excellent sealing performance is achieved through the ingenious design of the composite sealing piece. According to the multi-layer sealing structure of the composite sealing piece, multiple sealing defense lines are constructed through the synergistic effect of the sealing ring and the first sealing ring, and the risk of liquid or gas leakage is effectively resisted. The design of the anti-leakage storage cavity is a bright spot, and the anti-leakage storage cavity can temporarily store a small amount of leaked media, so that the sealing reliability is greatly improved under the conditions that the automobile piston rod moves frequently and sealing faces various challenges.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile piston rod, specifically to a leakproof automobile piston rod. BACKGROUND

[0002] Automobile piston rod is a key component in automobile hydraulic or pneumatic system, and plays an important role in many subsystems such as suspension system and brake system of automobile. It is mainly composed of cylinder and piston rod moving in the cylinder, and the cylinder provides support and guidance for the movement of piston rod, while the piston rod is responsible for transmitting force or energy. During the normal operation of the automobile, the piston rod needs to reciprocate frequently in the cylinder, which requires its sealing performance to be very reliable to prevent leakage of hydraulic oil or gas.

[0003] Disadvantages of existing automobile piston rod

[0004] (1) Single sealing structure

[0005] Low sealing reliability

[0006] The existing automobile piston rod sealing structure is often single, usually only relying on simple sealing ring or sealing ring for sealing. Such single sealing structure is prone to sealing failure when facing complex working conditions such as high temperature, high pressure and frequent piston rod reciprocation. Once the sealing component is worn or slightly deformed due to pressure fluctuation, it is likely to cause leakage of liquid or gas, affecting the normal operation of the automobile system.

[0007] Lack of redundancy design

[0008] Single sealing structure lacks redundancy and has no multiple sealing defense lines. If the first sealing appears a problem, there is no other sealing measure to make up for it, thus greatly increasing the risk of leakage. For example, when the automobile drives for a long time or drives in bad road conditions, the single sealing structure is difficult to ensure the sealing performance of the piston rod for a long time.

[0009] (2) Lack of response measures for leakage

[0010] No leakage buffer mechanism

[0011] The existing automobile piston rod sealing device does not consider the temporary storage or buffer mechanism for the leaked medium in the design. When the sealing component starts to leak slightly, the leaked liquid or gas will directly leak to the external environment due to the lack of corresponding accommodation space. This not only leads to the reduction of hydraulic oil or gas in the automobile system, affecting the normal work of the system, but also may pollute other parts of the automobile or the surrounding environment. INVENTION CONTENTS

[0012] (1) Technical problems solved

[0013] In view of the defects of the prior art, the utility model provides a kind of automobile piston rod of leakage prevention to solve above-mentioned problem.

[0014] (II) Technical scheme

[0015] To achieve the above object, the utility model provides the following technical scheme: a kind of automobile piston rod of leakage prevention, including cylinder barrel and piston rod, cylinder barrel inside is provided with composite seal at piston rod exit end, cylinder barrel end portion is threadedly sleeved with the closed end cover of the composite seal of compression positioning, and the annular abutment of composite seal bottom is installed on the inner cylinder wall of cylinder barrel close to end portion;

[0016] Composite seal specifically includes the following structure:

[0017] Three annular sealing components sequentially distributed from top to bottom, and connecting ring between adjacent annular sealing components is connected;

[0018] Annular sealing component is specifically one sealing ring, and two first sealing rings are distributed on the inner surface of sealing ring;

[0019] Wherein connecting ring is connected between the outer side edge of adjacent sealing ring and is surrounded with piston rod to form a closed anti-leakage storage cavity.

[0020] Preferably, two first sealing rings inside annular sealing component are specifically embedded in the inside of first sealing groove arranged on the inner surface of sealing ring.

[0021] Preferably, sealing ring outer annular wall is closely attached to the cylinder barrel end portion cylinder wall.

[0022] Preferably, the second sealing groove is arranged at the inner top near edge of closed end cover, and second sealing ring is embedded in the inside of second sealing groove, and second sealing ring is closely attached to the upper end port surface of cylinder barrel.

[0023] Preferably, sealing sleeve pipe is further provided at the piston rod exit hole of closed end cover top.

[0024] Preferably, third sealing groove is further provided on the inner side wall of sealing sleeve pipe, and third sealing ring is embedded in the inside of third sealing groove, and third sealing ring inner wall is closely attached to the rod wall of piston rod.

[0025] Compared with prior art, the utility model provides a kind of automobile piston rod of leakage prevention, with the following beneficial effects:

[0026] Multi-layer sealing structure

[0027] Multiple defense lines guarantee

[0028] The composite seal is composed of three annular sealing components, and the sealing ring in each annular sealing component can tightly fit on the inner wall of the cylinder to form the first line of defense for sealing. This multi-layer structure is like a multi-barrier, greatly increasing the ability to prevent liquid or gas leakage. Even if there is a small risk of leakage in one layer of sealing, other layers can still play a sealing role, ensuring the sealing of the entire device during the movement of the piston rod.

[0029] The reinforcing effect of the first sealing ring

[0030] The two first sealing rings distributed on the inner ring surface of each sealing ring further enhance the sealing effect. These first sealing rings are embedded in the first sealing groove on the inner ring surface of the sealing ring, firmly installed and will not shift or fall off. They work in conjunction with the sealing ring to effectively prevent possible leakage during the movement of the piston rod, making the seal more airtight and reliable.

[0031] The role of the anti-leakage storage cavity

[0032] Temporary storage of leaked medium

[0033] The connecting ring connects between the outer side edges of adjacent sealing rings and forms a closed anti-leakage storage cavity with the piston rod enclosure. This unique design can temporarily store a small amount of leaked liquid or gas. In actual work, if a very small amount of leakage occurs due to some reason, the leaked medium will be stored in this cavity and will not directly leak into the external environment, thereby maximizing the sealing performance of the entire sealing system.

[0034] Improving overall reliability

[0035] The presence of the anti-leakage storage cavity enables the composite seal to self-repair or mitigate the risk of leakage to some extent. Even if the sealing components gradually age or are damaged to some extent during long-term use, this storage cavity can provide some buffer for maintaining sealing performance, extending the service life of the entire sealing system and improving the overall reliability of the automobile piston rod device.

[0036] The anti-leakage automobile piston rod realizes excellent sealing performance through the ingenious design of the composite sealing piece. The multi-layer sealing structure of the composite sealing piece, the synergistic effect from the sealing ring to the first sealing ring, builds multiple sealing lines of defense, effectively resisting the risk of liquid or gas leakage. The design of the anti-leakage storage cavity is a highlight, which can temporarily store a small amount of leaked medium, which greatly improves the reliability of the seal in the case of frequent movement of the automobile piston rod and multiple challenges to the sealing surface. At the same time, the setting of the second sealing ring in the closed end cover and the third sealing ring in the sealing sleeve and other sealing components further perfect the entire sealing system. These sealing components cooperate with each other, from the sealing of the cylinder barrel and the sealing ring, the sealing of the piston rod and the sealing sleeve, to the overall multi-layer sealing and temporary storage of the leaked medium, to ensure the sealing performance of the automobile piston rod in various working conditions, reduce the problems of performance decline, component damage and other problems caused by leakage, and improve the safety, reliability and service life of the automobile. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is a whole semi-cut structure schematic view of the utility model;

[0038] Figure 2 It is a structure schematic view of the composite sealing piece of the utility model;

[0039] Figure 3 It is a semi-cut structure schematic view of the composite sealing piece of the utility model;

[0040] Figure 4 It is a semi-cut structure schematic view of the annular sealing assembly of the utility model.

[0041] Among them: 1, cylinder; 2, piston rod; 3, composite sealing piece; 4, closed end cover; 5, sealing sleeve;

[0042] 11, annular bearing platform;

[0043] 31, annular sealing assembly; 32, connecting ring;

[0044] 311, sealing ring; 312, first sealing groove; 313, first sealing ring;

[0045] 41, second sealing groove; 42, second sealing ring;

[0046] 51, third sealing groove; 52, third sealing ring. DETAILED DESCRIPTION

[0047] The utility model will make further detailed instructions below combined with the drawings and examples, obviously, the described examples are only a part of the utility model embodiment, rather than all the examples. In the case of no conflict, the examples in the application and the features in the examples can be combined with each other. Based on the examples in the utility model, all other examples obtained by the ordinary skill in the art without creative labor are within the scope of the utility model protection.

[0048] It should be noted that if the utility model embodiments involve directionality (such as up, down, left, right, front, back, etc.), the directionality is only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), if the specific posture changes, the directionality also changes accordingly.

[0049] In addition, "a plurality of" means two or more. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skill in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of the utility model protection.

[0050] Please refer to Figures 1-4 A leak-proof automobile piston rod, comprising a cylinder 1 and a piston rod 2. The cylinder 1 serves as the main supporting and containing part, providing a track and protection for the movement of the piston rod 2. The piston rod 2 inside the cylinder 1 is provided with a composite sealing element 3 at the outlet end, which plays a key sealing role and effectively prevents the leakage of liquid or gas. The cylinder 1 end is threaded with a closed end cover 4, which can be firmly installed at the end of the cylinder 1 through threaded connection, used for compressing and positioning the composite sealing element 3, ensuring that the composite sealing element 3 maintains stable sealing performance during work. The inner cylinder wall near the end of the cylinder 1 is installed with an annular bearing platform 11, which provides support for the composite sealing element 3 and is connected to the bottom of the composite sealing element 3.

[0051] The composite seal 3 is composed of three annular seal assemblies 31 arranged in sequence from top to bottom and connecting rings 32 connecting the adjacent annular seal assemblies 31. The annular seal assembly 31 comprises a sealing ring 311 and two first sealing rings 313 arranged on the inner surface of the sealing ring 311. The sealing ring 311 has good elasticity and wear resistance, and can tightly fit on the inner wall of the cylinder barrel 1 to form the first sealing line. The two first sealing rings 313 arranged on the inner surface of the sealing ring 311 further enhance the sealing effect and effectively prevent leakage that may occur during the movement of the piston rod 2. The connecting ring 32 connects the outer edges of the adjacent sealing rings 311 and forms a closed anti-leakage storage cavity with the piston rod 2, which can temporarily store a small amount of leaked liquid or gas, further improving the reliability of the seal.

[0052] Specifically, the two first sealing rings 313 inside the annular seal assembly 31 are embedded in the first sealing grooves 312 arranged on the inner surface of the sealing ring 311. The design of the first sealing grooves 312 enables the first sealing rings 313 to be firmly installed on the sealing ring 311, avoiding displacement or falling off during operation. The outer wall of the sealing ring 311 tightly fits on the barrel wall of the cylinder barrel 1, ensuring good sealing between the sealing ring 311 and the cylinder barrel 1, and effectively preventing leakage of the medium from the gap between the cylinder barrel 1 and the sealing ring 311.

[0053] The second sealing groove 41 is arranged near the edge of the inner top of the closed end cover 4, and the second sealing ring 42 is embedded in the second sealing groove 41. The second sealing ring 42 is made of a material with good elasticity and corrosion resistance, which can tightly fit on the upper port surface of the cylinder barrel 1 to form the second sealing line, further enhancing the sealing performance of the entire device.

[0054] The sealing sleeve 5 is also arranged on the top of the closed end cover 4 at the hole through which the piston rod 2 passes. The sealing sleeve 5 provides additional protection and sealing for the piston rod 2. The inner wall of the sealing sleeve 5 is provided with a third sealing groove 51, and the third sealing ring 52 is embedded in the third sealing groove 51. The inner wall of the third sealing ring 52 tightly fits on the rod wall of the piston rod 2, effectively preventing leakage of the medium from the gap between the piston rod 2 and the sealing sleeve 5, and ensuring the sealing reliability of the piston rod 2 during movement.

[0055] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0056] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0057] Furthermore, it should be understood that although the present specification describes exemplary embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that a person skilled in the art can understand.

Claims

1. A leak-proof automotive piston rod comprising a cylinder barrel (1) and a piston rod (2), characterized in that: The cylinder (1) is internally provided with a composite seal (3) at the end of the piston rod (2) passing out, the cylinder (1) is threadedly sleeved with an end cover (4) compressing and positioning the composite seal (3), and an annular bearing platform (11) is installed on the inner cylinder wall near the end of the cylinder (1) and bears the bottom of the composite seal (3); The composite seal (3) specifically comprises the following structure: Three annular sealing assemblies (31) distributed in sequence from top to bottom, and a connecting ring (32) connecting adjacent annular sealing assemblies (31); The annular sealing assembly (31) specifically comprises a sealing ring (311) and two first sealing rings (313) distributed on the inner surface of the sealing ring (311). The connecting ring (32) connects the outer edges of adjacent sealing rings (311) and forms a closed anti-leakage storage cavity with the piston rod (2).

2. A leak-proof automotive piston rod as claimed in claim 1, wherein: The two first sealing rings (313) in the annular sealing assembly (31) are embedded in the first sealing groove (312) on the inner surface of the sealing ring (311).

3. A leak-proof automotive piston rod as claimed in claim 1, wherein: The outer wall of the sealing ring (311) is tightly fitted on the end wall of the cylinder (1).

4. A leak-proof automotive piston rod as claimed in claim 1, wherein: The second sealing groove (41) is arranged on the inner top of the end cover (4), and the second sealing ring (42) is embedded in the second sealing groove (41), and the second sealing ring (42) is tightly fitted on the upper end surface of the cylinder (1).

5. A leak-proof automotive piston rod as claimed in claim 1, wherein: The sealing sleeve (5) is arranged on the top of the end cover (4) and the hole of the piston rod (2).

6. A leakproof automotive piston rod as claimed in claim 5, wherein: The third sealing groove (51) is arranged on the inner wall of the sealing sleeve (5), and the third sealing ring (52) is embedded in the third sealing groove (51), and the inner wall of the third sealing ring (52) is tightly fitted on the rod wall of the piston rod (2).

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