Sealing structure of piston cylinder body

Abstract

The utility model discloses a piston cylinder body sealing structure, and particularly relates to the technical field of sealing structures, the piston cylinder body sealing structure comprises a limiting ring body, a supporting assembly is arranged on the limiting ring body, the supporting assembly comprises a sealing cylinder body arranged on the limiting ring body, the sealing cylinder body is embedded in the limiting ring body, and a positioning ring used for supporting is arranged in the sealing cylinder body. According to the utility model, the supporting assembly is arranged, and the sealing rings are arranged in the second positioning ring cavity and the first positioning ring cavity, so that the piston can be sealed during operation, and the sealing rings are used for filling gaps among the butt joint, the sealing cylinder and the piston when being deformed under pressure, so that the sealing performance is ensured; through the arrangement of the first positioning ring cavity and the second positioning ring cavity, all the sealing rings can be embedded in the butt joint and the positioning ring, the phenomenon that the sealing rings are large, deform and shift is avoided, and the sealing performance is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing structures, and more specifically, to a piston-cylinder sealing structure. Background Art

[0002] Currently, most existing telescopic cylinders (such as air cylinders or oil cylinders) consist of a cylinder body, a piston, a piston rod, and a sealing ring. The piston is located within the cylinder body, and the piston rod is fixed to the piston. The sealing ring is used to seal the piston and the cylinder body. The sealing ring is located on the inner wall of the cylinder body and is a standard variable diameter sealing ring. When the piston moves, it moves through the air hole (1). Because the diameter of the air hole (1) is smaller than the top surface size of the square portion (1), part of the square portion (1) will break free from the inner wall of the cylinder body and squeeze out of the groove (1).

[0003] Among them, the patent with announcement number CN218882657U discloses a cylinder piston sealing structure, which includes a cylinder, a piston and a sealing ring. The piston is installed in the cylinder, a groove is opened on the piston cylinder, and the sealing ring is installed in the groove. The cross section of the sealing ring includes a buffer portion, a connecting portion and a raised portion. The buffer portion is attached to the bottom of the groove, the connecting portion is located between the buffer portion and the raised portion, and the raised portion is located above the groove opening and is attached to the inner side wall of the cylinder; inclined portions are provided on both sides of the groove side wall near the groove opening, and the width of the groove groove opening is smaller than the width of the groove bottom;

[0004] When this structure is in use, by providing an inclined portion, when the piston drives the sealing ring to move through the air hole, the sealing ring is affected by the inclined portion above the groove, so that the part of the sealing ring in the groove will not be squeezed out, thereby reducing the damage to the sealing ring caused by the air hole. However, this structure is not easy to quickly install the various structures together when in use, resulting in inconvenience during construction, and it is not easy to limit the piston, which can easily cause it to deviate and cause greater wear. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a piston-cylinder sealing structure, which aims to solve the problems raised in the above-mentioned background technology.

[0006] The utility model provides the following technical solutions: a piston-cylinder sealing structure, comprising a limiting ring body, wherein a supporting assembly is provided on the limiting ring body;

[0007] The support assembly includes a sealing cylinder provided on a limiting ring body, the sealing cylinder being embedded in the limiting ring body, and a positioning ring for support being provided in the interior of the sealing cylinder;

[0008] A limiting opening is provided at one end of the sealing cylinder, and a docking joint is embedded in the limiting opening. A second positioning ring cavity is provided on the side of the docking joint facing the sealing cylinder. Sealing rings are embedded in the second positioning ring cavity and the positioning ring, and the inner diameter of each sealing ring extends to the middle of the sealing cylinder.

[0009] It can be seen that in the above technical solution, the sealing rings arranged in the second positioning ring cavity and the first positioning ring cavity can play a sealing role when the piston is running, so that when the sealing rings are deformed by pressure, they are used to fill the gap between the butt joint and the sealing cylinder and the piston, thereby ensuring the sealing performance;

[0010] Optionally, in a possible embodiment, the limiting ring body is provided with a butt disc at one end away from the docking joint, the sealing cylinder body is provided with a groove at one end facing the butt disc, an extension cylinder is fixedly provided on the side of the butt disc facing the groove, the extension cylinder matches the groove, and the extension cylinder extends into the groove, mounting holes are provided on both sides of the surface of the limiting ring body, and the cross-sectional shape of each of the mounting holes is set to be arc-shaped, the vertical cross-sectional shape of the sealing cylinder body is T-shaped, and the sealing cylinder body is fixedly connected to the limiting ring body;

[0011] It can be seen that in the above technical solution, the piston is first guided by the stop plate, extension tube and docking joint to avoid the piston from shifting due to load during displacement, while ensuring the stability of the piston displacement and the sealing performance.

[0012] The technical effects and advantages of this utility model are:

[0013] By setting up the support assembly, compared with the existing technology, the overall design is simple and the structure is reasonable. Through the corresponding coordination of various structures, the piston is first guided by the contact plate, the extension cylinder and the docking joint, thereby preventing the piston from shifting due to load during displacement, while ensuring the stability of the piston displacement and the sealing performance.

[0014] At the same time, the sealing rings arranged in the second positioning ring cavity and the first positioning ring cavity can play a sealing role when the piston is running, so that when the sealing rings are subjected to pressure deformation, they are used to fill the gap between the docking head and the sealing cylinder and the piston, thereby ensuring the sealing performance. Through the setting of the first positioning ring cavity and the second positioning ring cavity, each sealing ring can be embedded in the docking head and the positioning ring, avoiding the phenomenon of large deformation and displacement of the sealing ring, thereby ensuring the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.

[0016] Figure 1 This is the main view of the overall structure of the utility model.

[0017] Figure 2 It is a three-dimensional diagram of the sealing cylinder and the positioning ring of the utility model.

[0018] Figure 3 This is a schematic diagram of the utility model when the limiting ring body, sealing cylinder and positioning ring are installed together.

[0019] Figure 4 It is a three-dimensional diagram of the butt joint and the sealing ring of the utility model.

[0020] Figure 5 It is a cross-sectional view of the overall structure of the utility model.

[0021] The accompanying drawings are marked as follows: 1. limiting ring body; 2. sealing cylinder body; 3. positioning ring; 4. first positioning ring cavity; 5. docking joint; 6. second positioning ring cavity; 7. sealing ring; 8. abutment plate; 9. groove; 10. extension cylinder; 11. mounting hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] As attached Figure 1-5The piston-cylinder sealing structure shown in the figure uses a support assembly provided on the limiting ring body 1 to first guide the piston through the plate 8, the extension cylinder 10 and the docking joint 5 to avoid the piston being displaced due to load during displacement, while ensuring the stability of the piston displacement and the sealing performance. At the same time, the sealing ring 7 provided in the second positioning ring cavity 6 and the first positioning ring cavity 4 can play a sealing role when the piston is running, so that when the sealing ring 7 is subjected to pressure deformation, it is used to fill the gap between the docking joint 5 and the sealing cylinder 2 and the piston to ensure the sealing performance. Through the provision of the first positioning ring cavity 4 and the second positioning ring cavity 6, each sealing ring 7 can be embedded in the docking joint 5 and the positioning ring 3 to avoid the sealing ring 7 from being displaced due to large deformation, thereby ensuring the sealing performance. The specific structural arrangement of the assembly is as follows;

[0024] The support assembly includes a sealing cylinder 2 provided on a limiting ring 1, the sealing cylinder 2 is embedded in the limiting ring 1, and a positioning ring 3 for support is provided inside the sealing cylinder 2;

[0025] A limiting opening is provided at one end of the sealing cylinder 2, and a docking joint 5 is embedded in the limiting opening. A second positioning ring cavity 6 is provided on the side of the docking joint 5 facing the sealing cylinder 2. Sealing rings 7 are embedded in the second positioning ring cavity 6 and the positioning ring 3, and the inner diameter of each sealing ring 7 extends to the middle of the sealing cylinder 2.

[0026] A stop plate 8 is provided at the end of the limiting ring body 1 away from the docking joint 5, a groove 9 is provided at the end of the sealing cylinder 2 facing the stop plate 8, an extension cylinder 10 is fixedly provided on the side of the stop plate 8 facing the groove 9, the extension cylinder 10 matches the groove 9, and the extension cylinder 10 extends into the groove 9. Mounting holes 11 are provided on both sides of the surface of the limiting ring body 1, and the cross-sectional shape of each mounting hole 11 is set to be arc-shaped. The vertical cross-sectional shape of the sealing cylinder body 2 is T-shaped, and the sealing cylinder body 2 is fixedly connected to the limiting ring body 1.

[0027] According to the above structure, when the device is used, the staff installs the device at the designated position. When in use, the piston extends to the middle of the sealing cylinder 2. The piston is first guided by the abutment plate 8, the extension cylinder 10 and the docking joint 5 to prevent the piston from shifting due to load during displacement, while ensuring the stability of the piston displacement and the sealing performance.

[0028] At the same time, the sealing ring 7 provided in the second positioning ring cavity 6 and the first positioning ring cavity 4 can play a sealing role when the piston is running, so that when the sealing ring 7 is deformed by pressure, it can fill the gap between the butt joint 5 and the sealing cylinder 2 and the piston to ensure the sealing performance;

[0029] By setting the first positioning ring cavity 4 and the second positioning ring cavity 6, each sealing ring 7 can be embedded in the docking head 5 and the positioning ring 3, avoiding the sealing ring 7 from being greatly deformed and shifted, thereby ensuring the sealing performance.

[0030] Different from the prior art, the present application discloses a piston-cylinder sealing structure, which first guides the piston through the butt plate 8, the extension tube 10 and the docking joint 5 to avoid the piston from being displaced due to load during displacement, while ensuring the stability of the piston displacement and the sealing performance. At the same time, the sealing ring 7 arranged in the second positioning ring cavity 6 and the first positioning ring cavity 4 can play a sealing role when the piston is running, so that the sealing ring 7 is used to fill the gap between the docking joint 5 and the sealing cylinder 2 and the piston when it is deformed by pressure, thereby ensuring the sealing performance. Through the setting of the first positioning ring cavity 4 and the second positioning ring cavity 6, each sealing ring 7 can be embedded in the docking joint 5 and the positioning ring 3, thereby avoiding the sealing ring 7 from being displaced due to large deformation, thereby ensuring the sealing performance.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A piston-cylinder sealing structure, comprising a limiting ring (1), characterized in that: The limiting ring body (1) is provided with a support assembly; The support assembly comprises a sealing cylinder (2) arranged on a limiting ring (1), the sealing cylinder (2) being embedded in the interior of the limiting ring (1), and a positioning ring (3) for support being arranged in the interior of the sealing cylinder (2); A limiting opening is provided at one end of the sealing cylinder (2), and a docking joint (5) is embedded in the limiting opening. A second positioning ring cavity (6) is provided on the side of the docking joint (5) facing the sealing cylinder (2).

2. The piston-cylinder sealing structure according to claim 1, characterized in that: A sealing ring (7) is embedded in both the second positioning ring cavity (6) and the positioning ring (3), and the inner diameter of each sealing ring (7) extends to the middle of the sealing cylinder (2).

3. The piston-cylinder sealing structure according to claim 1, characterized in that: An end of the limiting ring body (1) away from the docking joint (5) is provided with a butt disc (8), and an end of the sealing cylinder (2) facing the butt disc (8) is provided with a groove (9).

4. The piston-cylinder sealing structure according to claim 3, characterized in that: An extension tube (10) is fixedly provided on one side of the abutment disc (8) facing the groove (9), and the extension tube (10) matches the groove (9), and the extension tube (10) extends into the groove (9).

5. The piston-cylinder sealing structure according to claim 1, characterized in that: Mounting holes (11) are provided on both sides of the surface of the limiting ring body (1), and the cross-sectional shape of each mounting hole (11) is set to be an arc.

6. The piston-cylinder sealing structure according to claim 1, characterized in that: The vertical cross-section of the sealing cylinder (2) is T-shaped, and the sealing cylinder (2) is fixedly connected to the limiting ring (1).

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