Stainless steel oil cylinder with double-sealing structure

Abstract

The utility model provides a stainless steel oil cylinder with a double-sealing structure, which relates to the field of stainless steel oil cylinders and comprises an oil cylinder body, a cylinder barrel, a sealing component arranged on one side of the cylinder barrel and used for sealing the cylinder barrel, a connecting barrel fixedly connected to one end of the cylinder barrel and a piston rod movably connected to an inner cavity of the cylinder barrel. The sealing ring gasket is arranged on the back face of the cylinder cover and makes contact with the cylinder barrel to form first sealing, the sealing ring is arranged on the surface of the connecting ring, extends to the inner cavity of the connecting ring and makes contact with the inner wall of the connecting barrel and the surface of the piston rod to form second sealing, and meanwhile the sealing sleeve and the sealing ring make contact with the piston rod. Through the arrangement of multiple seals, the situation that the sealing performance of the oil cylinder body is reduced due to failure of single seal is effectively prevented, and therefore the service life of the oil cylinder is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of stainless steel hydraulic cylinders, specifically a stainless steel hydraulic cylinder with a double sealing structure. Background Technology

[0002] Stainless steel hydraulic cylinders, also known as hydraulic cylinders, are hydraulic actuators made of stainless steel that convert hydraulic energy into mechanical energy to achieve reciprocating motion. They are widely used in the hydraulic systems of various mechanical equipment such as vehicles, construction machinery, lifting and transportation machinery, mining machinery, and metallurgical machinery.

[0003] Stainless steel hydraulic cylinders are mainly composed of cylinder barrel, piston, piston rod, seals, and end caps. During installation and use, a seal is installed at the connection between the cylinder barrel and cylinder cap to ensure a tight connection and prevent external water or impurities from entering the cylinder barrel through gaps and affecting the hydraulic cylinder. However, in existing technologies, stainless steel hydraulic cylinders mostly use single-acting seals at the connection points. Since only one seal is used to prevent external water or impurities from entering through the connection gaps, this seal is susceptible to failure due to external factors such as wear, aging, or corrosion after prolonged use. This severely affects the sealing performance of the connection, allowing external impurities or water to enter the cylinder barrel through the gaps, which not only affects the operation of the hydraulic cylinder but also shortens its service life.

[0004] In summary, this utility model provides a stainless steel hydraulic cylinder with a double sealing structure to solve the above problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A stainless steel hydraulic cylinder with a double-sealing structure, including

[0007] The cylinder body includes a cylinder barrel, a sealing assembly disposed on one side of the cylinder barrel for sealing the cylinder barrel, a connecting cylinder fixedly connected to one end of the cylinder barrel, and a piston rod movably connected to the inner cavity of the cylinder barrel.

[0008] The sealing assembly includes a cylinder head, a through pipe communicating with the inner cavity of the cylinder head, a sealing ring gasket disposed on the back of the cylinder head, a connecting ring disposed at one end of the through pipe, a sealing ring disposed on the surface of the connecting ring and extending into the inner cavity of the connecting ring, and a sealing sleeve disposed on the front of the cylinder head and in contact with the piston rod.

[0009] Furthermore, in this utility model, one end of the connecting cylinder extends into the inner cavity of the cylinder head and is threadedly connected to the inner cavity of the cylinder head. The surface of the sealing ring contacts the inner wall of the connecting cylinder, and the inner wall of the sealing ring contacts the surface of the piston rod.

[0010] Furthermore, in this utility model, an annular groove is provided on the back of the cylinder head, the sealing ring gasket is located in the inner cavity of the annular groove and is movably connected to the inner cavity of the annular groove, and the front of the sealing ring gasket is in contact with the cylinder.

[0011] Furthermore, in this utility model, one end of the through pipe is fixedly connected to a threaded ring, and one end of the threaded ring extends into the inner cavity of the connecting ring and is threadedly connected to the inner cavity of the connecting ring.

[0012] Beneficial effects: This utility model has the following beneficial effects:

[0013] This invention uses a sealing ring gasket placed on the back of the cylinder head to contact the cylinder barrel, forming a first seal. A sealing ring is placed on the surface of the connecting ring and extends into its inner cavity, contacting the inner wall of the connecting cylinder and the surface of the piston rod, forming a second seal. Simultaneously, both the sealing sleeve and the sealing ring contact the piston rod, thus enhancing the double seal at the connection between the cylinder head and the piston rod. This improves the sealing performance of the hydraulic cylinder. The multiple sealing configuration effectively prevents the failure of a single seal from reducing the sealing performance of the hydraulic cylinder body, thereby extending its service life. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the cylinder structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the cylinder head structure in the rear view of this utility model;

[0017] Figure 4 This is a schematic diagram of the cylinder head and sealing ring gasket in the separated state of this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the present invention with the through pipe and connecting ring separated.

[0019] In the picture:

[0020] 100. Cylinder body; 110. Cylinder barrel; 120. Sealing assembly; 121. Cylinder head; 122. Through pipe; 123. Sealing ring gasket; 124. Connecting ring; 125. Sealing ring; 126. Sealing sleeve; 127. Threaded ring; 128. Annular groove; 130. Piston rod; 140. Connecting cylinder. Detailed Implementation

[0021] To better understand the technical content of this utility model, specific embodiments are described below in conjunction with the accompanying drawings. Various aspects of this utility model are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments of this disclosure are not necessarily defined to include all aspects of this utility model. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in this utility model are not limited to any particular implementation. Furthermore, some aspects of this utility model can be used alone or in any suitable combination with other aspects disclosed in this utility model.

[0022] Example 1

[0023] like Figures 1-5 As shown, this is the first embodiment of the present invention. This embodiment provides a stainless steel hydraulic cylinder with a double-sealing structure, including...

[0024] The cylinder body 100 includes a cylinder barrel 110, a sealing assembly 120 disposed on one side of the cylinder barrel 110 and used to seal the cylinder barrel 110, a connecting cylinder 140 fixedly connected to one end of the cylinder barrel 110, and a piston rod 130 movably connected to the inner cavity of the cylinder barrel 110.

[0025] The sealing assembly 120 includes a cylinder head 121, a through pipe 122 communicating with the inner cavity of the cylinder head 121, a sealing ring gasket 123 disposed on the back side of the cylinder head 121, a connecting ring 124 disposed at one end of the through pipe 122, a sealing ring 125 disposed on the surface of the connecting ring 124 and extending into the inner cavity of the connecting ring 124, and a sealing sleeve 126 disposed on the front side of the cylinder head 121 and in contact with the piston rod 130.

[0026] like Figures 1-5 As shown, the cylinder head 121 drives the sealing ring gasket 123 to connect with the cylinder barrel 110, thereby the sealing ring gasket 123 will contact the cylinder barrel 110 to form the first seal between the two. The through pipe 122 drives the connecting ring 124 and the sealing ring 125 into the inner wall of the connecting cylinder 140, thereby allowing the outer surface of the sealing ring 125 to contact the inner wall of the connecting cylinder 140 to form the second seal between the two. At the same time, the inner rings of the sealing sleeve 126 and the sealing ring 125 are in contact with the piston rod 130, thereby enhancing the sealing effect at the connection between the cylinder head 121 and the piston rod 130, forming a double seal between the piston rod 130 and the cylinder head 121. This improves the sealing performance of the cylinder body 100. Through the setting of multiple seals, the failure of a single seal can effectively prevent the reduction of the sealing performance of the cylinder body 100, thereby extending its service life.

[0027] Example 2

[0028] ReferenceFigures 1-3 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0029] In this embodiment, one end of the connecting cylinder 140 extends into the inner cavity of the cylinder head 121 and is threadedly connected to the inner cavity of the cylinder head 121. The surface of the sealing ring 125 contacts the inner wall of the connecting cylinder 140, and the inner wall of the sealing ring 125 contacts the surface of the piston rod 130.

[0030] like Figures 1-3 As shown, one end of the connecting cylinder 140 extends into the inner cavity of the cylinder head 121 and is tightly connected to the inner cavity of the cylinder head 121 by a threaded connection. This design not only enhances the stability of the connection, but also allows the sealing ring 125 to fit tightly against the inner wall of the connecting cylinder 140. At the same time, the inner wall of the sealing ring 125 also keeps in contact with the surface of the piston rod 130, forming the first effective sealing barrier, which can prevent hydraulic oil leakage and block external impurities from entering the cylinder 110.

[0031] Example 3

[0032] Reference Figures 3-5 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0033] In this embodiment, an annular groove 128 is provided on the back of the cylinder head 121, and a sealing ring gasket 123 is located in the inner cavity of the annular groove 128 and is movably connected to the inner cavity of the annular groove 128. The front of the sealing ring gasket 123 is in contact with the cylinder barrel 110.

[0034] One end of the through pipe 122 is fixedly connected to a threaded ring 127, one end of which extends into the inner cavity of the connecting ring 124 and is threadedly connected to the inner cavity of the connecting ring 124.

[0035] like Figures 3-5 As shown, the design of the annular groove 128 provides a stable installation position for the sealing ring gasket 123. At the same time, the design of the annular groove 128 makes the installation and replacement of the sealing ring gasket 123 more convenient and quick, reducing the maintenance difficulty. The design of the threaded ring 127 enhances the connection strength between the through pipe 122 and the connecting ring 124, ensuring the stability and sealing of the connection under high pressure or vibration environment. Through the threaded connection, the through pipe 122 and the connecting ring 124 can be easily installed or disassembled, reducing the difficulty of later maintenance.

[0036] In use, first align the cylinder head 121 with the connecting cylinder 140. Rotating the cylinder head 121, since it is threadedly connected to the connecting cylinder 140, causes the cylinder head 121 to move the sealing ring gasket 123, the through pipe 122, the connecting ring 124, and the sealing ring 125 towards the cylinder barrel 110 until the sealing ring gasket 123 contacts the cylinder barrel 110, forming a preliminary seal. Simultaneously, the through pipe 122, along with the connecting ring 124 and the sealing ring 125, enters the inner wall of the connecting cylinder 140, allowing the outer surface of the sealing ring 125 to contact the inner wall of the connecting cylinder 140, forming a final seal. The second seal connecting the two completes the sealing of the cylinder 110. The piston rod 130 passes through the connecting ring 124, the through pipe 122 and the cylinder head 121. The sealing sleeve 126 at one end of the cylinder head 121 and the inner ring of the sealing ring 125 on the connecting ring 124 will both contact the surface of the piston rod 130, thus forming a double seal at the connection between the piston rod 130 and the cylinder head 121. This effectively ensures the sealing performance. Furthermore, the multiple seals effectively prevent the failure of a single seal from reducing the sealing performance of the cylinder body 100, thereby extending its service life.

[0037] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.

[0038] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A stainless steel hydraulic cylinder with a double-sealing structure, characterized in that: include The cylinder body (100) includes a cylinder barrel (110), a sealing assembly (120) disposed on one side of the cylinder barrel (110) and used to close the cylinder barrel (110), a connecting cylinder (140) fixedly connected to one end of the cylinder barrel (110), and a piston rod (130) movably connected to the inner cavity of the cylinder barrel (110). The sealing assembly (120) includes a cylinder head (121), a through pipe (122) communicating with the inner cavity of the cylinder head (121), a sealing ring gasket (123) disposed on the back of the cylinder head (121), a connecting ring (124) disposed at one end of the through pipe (122), a sealing ring (125) disposed on the surface of the connecting ring (124) and extending into the inner cavity of the connecting ring (124), and a sealing sleeve (126) disposed on the front of the cylinder head (121) and in contact with the piston rod (130).

2. The stainless steel hydraulic cylinder with a double-sealing structure as described in claim 1, characterized in that: One end of the connecting cylinder (140) extends into the inner cavity of the cylinder head (121) and is threadedly connected to the inner cavity of the cylinder head (121). The surface of the sealing ring (125) contacts the inner wall of the connecting cylinder (140), and the inner wall of the sealing ring (125) contacts the surface of the piston rod (130).

3. The stainless steel hydraulic cylinder with a double-sealing structure as described in claim 1, characterized in that: The cylinder head (121) has an annular groove (128) on its back side. The sealing ring gasket (123) is located in the inner cavity of the annular groove (128) and is movably connected to the inner cavity of the annular groove (128). The front side of the sealing ring gasket (123) is in contact with the cylinder (110).

4. The stainless steel hydraulic cylinder with a double-sealing structure as described in claim 1, characterized in that: One end of the through pipe (122) is fixedly connected to a threaded ring (127), one end of which extends into the inner cavity of the connecting ring (124) and is threadedly connected to the inner cavity of the connecting ring (124).

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