Sealing end cover with circumferential expansion and contraction matching connection structure

Abstract

The utility model provides a sealing end cover with a circumferential expansion and contraction matching connection structure, which comprises a main body shielding cover component, a switching positioning component, an axial limiting component, an axial matching connection component, an auxiliary shielding cover component and an expansion and contraction matching connection component, and the design of an embedding connection ring groove of the sealing end cover enables the outer wall of a static ring to be embedded into the embedding connection ring groove. Therefore, the main body barrel shell is fixedly connected with the static ring, the stability of the whole structure is enhanced, the static ring can be axially limited through the design of the limiting notch and the sealing caulking groove, the joint face of the adapter convex ring and the static ring is sealed, and the sealing performance is improved; the end cover can be jacked and pressed through the axial jacking and pressing mechanism due to the matching of the matching ring groove and the axial jacking and pressing mechanism, so that the application of axial pressure and the sealing of the sealing ring are realized, the stable performance of the sealing element can be kept under various working conditions, and the sealing element has higher reliability and longer service life in practical application.

Description

Technical Field

[0001] The utility model relates to a sealing component, in particular to a sealing end cover with a circumferential expansion and contraction matching structure. Background Art

[0002] Patent document CN203627404U discloses a sealing end cover, which includes an end cover body, and the inner wall of the piston hole of the end cover body is provided with two or more sealing grooves and a dustproof groove, and the sealing groove is provided with a sealing ring, and the dustproof groove is provided with a dustproof ring, and the length of the end cover body placed outside the oil cylinder is ≥4cm. By adding one or more sealing grooves in the end cover body and increasing the number of sealing rings, the sealing ring and the piston shaft are more tightly sealed, and the oil sealing effect is doubly protected. At the same time, the length of the oil cylinder sealing end cover is increased, and the guiding performance of the piston shaft is improved. At the same time, the wear-resistant tin bronze material is used to replace the original material, which can further increase the service life of the oil cylinder sealing end cover, reduce the frequent oil leakage caused by the extrusion deformation of the dustproof ring caused by the bending deformation of the piston shaft, and reduce the cost of using the sealing ring. However, the end of this sealing end cover adopts an integral structure, and the dustproof cover body is easy to loosen during long-term operation after installation, so that external dust and debris invade, affecting the operating stability of the sealing assembly. Therefore, it is necessary to optimize the structure of this sealing end cover to overcome the above defects. Utility Model Content

[0003] The utility model aims to provide a sealing end cover with a circumferential expansion and contraction matching structure to improve its operating stability.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A sealing end cover with a circumferential expansion and contraction matching structure, comprising:

[0006] A main body shielding component, wherein the main body shielding component has a receiving space adapted to the shape of the outer wall of the static ring, and the main body shielding component shields the static ring;

[0007] A transfer positioning member, which is formed in the main body cover member and has an assembly space inside;

[0008] An axial limiting component is formed in the transfer positioning component and is adapted to the shape of the end of the stationary ring, and can axially limit the end of the stationary ring;

[0009] An axial matching component, which is formed in the transfer positioning component and is located opposite to the axial limiting component. Its shape is adapted to the axial pressing mechanism, and the axial matching component can be pressed by the axial pressing mechanism to apply axial pressure to the transfer positioning component and the main body shield component;

[0010] An auxiliary shielding member is formed in the main shielding member, and has a receiving space inside thereof that matches the shape of the end of the rotating shaft, and the end of the rotating shaft is shielded by the auxiliary shielding member;

[0011] The expansion and contraction matching component is formed in the auxiliary shielding component, and its shape is consistent with the rotating shaft. The auxiliary shielding component can be matched with the rotating shaft cover shell through the expansion and contraction matching component.

[0012] Specifically, the main body shielding component includes:

[0013] The main body shell is cylindrical and has a receiving space inside that matches the shape of the outer wall of the static ring;

[0014] The embedding ring groove is arranged on the inner wall of the main body shell, extends along the circumference of the main body shell and is recessed into the inside of the main body shell. The outer wall of the stationary ring can be embedded in the embedding ring groove to fix the main body shell with the stationary ring.

[0015] The transfer positioning component includes:

[0016] The adapter convex ring is formed on the outer wall of the main body shell, extends along the circumference of the main body shell, and radially protrudes toward the outside of the main body shell. The axial ends of the adapter convex ring form an outer positioning surface and an inner positioning surface.

[0017] The axial limiting component includes:

[0018] A limiting recess is provided in the inner positioning surface of the transfer convex ring, extends along the circumferential direction of the transfer convex ring, and is axially recessed into the transfer convex ring. Its shape matches the shape of the limiting convex ridge of the stationary ring. The transfer convex ring can axially limit the stationary ring through the limiting recess;

[0019] A sealing groove is provided in the inner positioning surface of the transition convex ring. It is located outside the limiting recess, extends along the circumference of the transition convex ring, and is radially recessed into the interior of the transition convex ring. Its shape is adapted to the stationary ring sealing ring. The stationary ring sealing ring can be embedded in the sealing groove to seal the joint surface between the transition convex ring and the limiting convex ridge of the stationary ring.

[0020] The axial coupling components include:

[0021] The matching ring groove is arranged in the outer positioning surface of the adapter convex ring, extends along the circumference of the adapter convex ring, and is recessed axially toward the inside of the adapter convex ring. Its shape is adapted to the axial pressing mechanism and its sealing ring.

[0022] The auxiliary mask components include:

[0023] The auxiliary cylindrical shell is formed at the outer end of the main cylindrical shell, extends along the circumference of the main cylindrical shell, and protrudes axially toward the outside of the main cylindrical shell.

[0024] The expansion and contraction fitting components include:

[0025] A group of expansion and contraction notches are provided, each of which is opened in the auxiliary cylinder shell, extending from the end of the auxiliary cylinder shell to the connecting part of the auxiliary cylinder shell and the main cylinder shell, and arranged sequentially along the circumference of the auxiliary cylinder shell. The auxiliary cylinder shell can expand or retract through the expansion and contraction notches, which is convenient for installing the dust cover on the auxiliary cylinder shell to avoid loosening.

[0026] The advantages of the utility model are:

[0027] The design of the sealing end cover embedding ring groove enables the outer wall of the static ring to be embedded therein, thereby fixing the main cylinder shell and the static ring in fixed connection, enhancing the stability of the overall structure; the design of the limiting recess and the sealing embedding groove can realize the axial limitation of the static ring, and seal the joint surface of the transition convex ring and the static ring, thereby improving the sealing performance; the adaptation of the matching ring groove and the axial pressing mechanism enables the end cover to be pressed by the axial pressing mechanism, thereby realizing the application of axial pressure and the sealing of the sealing ring; the auxiliary cylinder shell can be expanded or retracted through the expansion and contraction notch, thereby facilitating the installation of the dust cover body on the auxiliary cylinder shell to avoid loosening, thereby ensuring that the seal can maintain stable performance under various working conditions, and showing higher reliability and longer service life in practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the top surface structure of the sealing end cover with a circumferential expansion and contraction matching structure proposed by the utility model;

[0029] Figure 2 1 is a schematic diagram of the secondary structure of the sealing end cover;

[0030] Figure 3 It is a schematic diagram of the cross-sectional structure of the sealing end cover. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0032] like Figures 1 to 3 As shown, the sealing end cover with a circumferential expansion and contraction matching structure proposed by the utility model includes a main body mask component, a transfer positioning component, an axial limiting component, an axial matching component, an auxiliary mask component and an expansion and contraction matching component. The main body mask component has a accommodating space that matches the shape of the outer wall of the stationary ring. The stationary ring is covered by the main body mask component. The transfer positioning component is formed in the main body mask component, and there is an assembly space inside it. The axial limiting component is formed in the transfer positioning component and matches the shape of the end of the stationary ring, and can axially limit the end of the stationary ring. The axial matching The component is formed in the transfer positioning component and is opposite to the axial limiting component. Its shape is adapted to the axial pressing mechanism. The axial matching component can be pressed by the axial pressing mechanism to apply axial pressure to the transfer positioning component and the main body mask component. The auxiliary mask component is formed in the main body mask component. It has a accommodating space adapted to the shape of the end of the rotating shaft. The end of the rotating shaft is covered by the auxiliary mask component. The expansion and contraction matching component is formed in the auxiliary mask component. Its shape is the same as the rotating shaft. The auxiliary mask component can be matched with the rotating shaft cover shell through the expansion and contraction matching component.

[0033] In this embodiment, the main body shielding component includes a main body cylinder shell 110 and an embedding ring groove 120. The main body cylinder shell is cylindrical and has an accommodating space inside that is adapted to the shape of the outer wall of the static ring. The embedding ring groove is opened on the inner wall of the main body cylinder shell, extends along the circumference of the main body cylinder shell, and is recessed into the interior of the main body cylinder shell. The outer wall of the static ring can be embedded in the embedding ring groove to fix the main body cylinder shell and the static ring.

[0034] The transition positioning component includes a transition convex ring 200, which is formed on the outer wall of the main cylinder shell, extends along the circumference of the main cylinder shell, and protrudes radially toward the outside of the main cylinder shell, and its axial ends form an outer positioning surface and an inner positioning surface.

[0035] The axial limiting component includes a limiting recess 310 and a sealing groove 320. The limiting recess is provided in the inner positioning surface of the transition convex ring, extends along the circumference of the transition convex ring, and is axially recessed into the transition convex ring. Its shape is adapted to the shape of the limiting convex ridge of the static ring. The transition convex ring can axially limit the static ring through the limiting recess. The sealing groove is provided in the inner positioning surface of the transition convex ring. It is located outside the limiting recess, extends along the circumference of the transition convex ring, and is radially recessed into the transition convex ring. Its shape is adapted to the static ring sealing ring. The static ring sealing ring can be embedded in the sealing groove to seal the joint surface between the transition convex ring and the limiting ridge of the static ring.

[0036] The axial matching component includes a matching ring groove 400, which is opened in the outer positioning surface of the adapter convex ring, extends along the circumference of the adapter convex ring, and is axially recessed into the adapter convex ring. Its shape is compatible with the axial pressing mechanism and its sealing ring.

[0037] The auxiliary shielding member comprises an auxiliary cylindrical shell 500, which is formed at the outer end of the main cylindrical shell, extends along the circumference of the main cylindrical shell, and protrudes axially toward the outside of the main cylindrical shell.

[0038] The expansion and contraction matching component includes an expansion and contraction notch 600, and a group of expansion and contraction notches are provided. Each expansion and contraction notch is respectively opened in the auxiliary cylinder shell, extending from the end of the auxiliary cylinder shell to the connecting part of the auxiliary cylinder shell and the main cylinder shell, and arranged sequentially along the circumference of the auxiliary cylinder shell. The auxiliary cylinder shell can expand or shrink through the expansion and contraction notch.

[0039] In the description of the present utility model, it should be noted that when terms such as "upper", "lower", "inner", "outer", "left", "right" and the like indicating orientation or positional relationship appear, it should be understood that the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the equipment or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, when terms such as "first" and "second" appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and limited, terms such as "installation", "setting", and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. A sealing end cover with a circumferential expansion and contraction fitting structure, characterized in that: include: A main body shielding component, wherein the main body shielding component has a receiving space adapted to the shape of the outer wall of the static ring, and the main body shielding component shields the static ring; A transfer positioning member, which is formed in the main body cover member and has an assembly space inside; An axial limiting component is formed in the transfer positioning component and is adapted to the shape of the end of the stationary ring, and can axially limit the end of the stationary ring; An axial matching component, which is formed in the transfer positioning component and is located opposite to the axial limiting component. Its shape is adapted to the axial pressing mechanism, and the axial matching component can be pressed by the axial pressing mechanism to apply axial pressure to the transfer positioning component and the main body shield component; An auxiliary shielding member is formed in the main shielding member, and has a receiving space inside thereof that matches the shape of the end of the rotating shaft, and the end of the rotating shaft is shielded by the auxiliary shielding member; The expansion and contraction matching component is formed in the auxiliary shielding component, and its shape is consistent with the rotating shaft. The auxiliary shielding component can be matched with the rotating shaft cover shell through the expansion and contraction matching component.

2. A sealing end cover with a circumferential expansion and contraction matching structure according to claim 1, characterized in that: The main body mask component includes: The main body shell is cylindrical and has a receiving space inside that matches the shape of the outer wall of the static ring; The embedding ring groove is arranged on the inner wall of the main body shell, extends along the circumference of the main body shell, and is recessed toward the inside of the main body shell.

3. The sealing end cover with a circumferential expansion and contraction matching structure according to claim 2, characterized in that: The transfer positioning component includes: The adapter convex ring is formed on the outer wall of the main body shell, extends along the circumference of the main body shell, and radially protrudes toward the outside of the main body shell. The axial ends of the adapter convex ring form an outer positioning surface and an inner positioning surface.

4. The sealing end cover with a circumferential expansion and contraction matching structure according to claim 3, characterized in that: The axial limiting component includes: A limiting recess is provided in the inner positioning surface of the transfer convex ring, extends along the circumferential direction of the transfer convex ring, and is recessed axially toward the inside of the transfer convex ring, and its shape is adapted to the shape of the limiting convex ridge of the stationary ring; A sealing groove is provided in the inner positioning surface of the transition convex ring. The sealing groove is located outside the limiting recess, extends along the circumference of the transition convex ring, and is recessed radially toward the inside of the transition convex ring. The shape of the sealing groove matches the static ring seal.

5. The sealing end cover with a circumferential expansion and contraction matching structure according to claim 4, characterized in that: The axial coupling components include: The matching ring groove is arranged in the outer positioning surface of the adapter convex ring, extends along the circumference of the adapter convex ring, and is recessed axially toward the inside of the adapter convex ring. Its shape is adapted to the axial pressing mechanism and its sealing ring.

6. The sealing end cover with a circumferential expansion and contraction matching structure according to claim 2, characterized in that: The auxiliary mask components include: The auxiliary cylindrical shell is formed at the outer end of the main cylindrical shell, extends along the circumference of the main cylindrical shell, and protrudes axially toward the outside of the main cylindrical shell.

7. The sealing end cover with a circumferential expansion and contraction matching structure according to claim 6, characterized in that: The expansion and contraction fitting components include: The expansion and contraction notches are provided in a group, each expansion and contraction notch is respectively opened in the auxiliary cylinder shell, extends from the end of the auxiliary cylinder shell to the connecting part of the auxiliary cylinder shell and the main cylinder shell, and is arranged in sequence along the circumference of the auxiliary cylinder shell.

Images