Sealing ring chain

Abstract

The utility model discloses a sealing ring chain which comprises chain links, chain plates, pin shafts, sleeves and a sealing assembly, each chain plate is matched with two chain links through the two pin shafts respectively, the pin shafts penetrate through through holes, corresponding to the chain plates, of the chain links, the sleeves are arranged on the outer sides of the pin shafts in a sleeved mode, the sealing assembly comprises a first sealing ring and a second sealing ring, and the first sealing ring is connected with the second sealing ring in a sleeved mode. The combined type sealing structure is installed on the outer side of the shaft sleeve, the sealing effect can be enhanced through the inner sealing ring and the outer sealing ring, if the outer sealing ring is damaged, the inner sealing ring can be used as a standby, and if the outer sealing ring is damaged, the inner sealing ring can be used as a standby sealing ring. And the two sealing rings are made of different materials, so that the inner-layer ring is relatively softer, the outer-layer ring is harder, external pressure can be resisted, and the wear resistance can be remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chains, in particular to a sealing ring chain. Background Art

[0002] Installing a sealing ring on the outside of the chain sleeve can prevent grease loss and debris from entering the chain sleeve gap during use. It is suitable for use in environments with high wear resistance requirements and cannot be lubricated frequently. The existing technology generally uses a single sealing ring. On the one hand, the sealing effect is difficult to guarantee, and on the other hand, the service life is limited due to wear. Utility Model Content

[0003] In order to solve the above technical problems, the utility model relates to a sealing ring chain, which has a simple and reliable structure, effectively solves the above technical problems, and is suitable for popularization and use. In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0004] A sealing ring chain comprises a chain link, a chain plate, a pin shaft, a sleeve and a sealing assembly, wherein each chain plate cooperates with two chain links through two pin shafts respectively, the pin shaft passes through the through holes corresponding to the chain link and the chain plate, the sleeve is sleeved on the outside of the pin shaft, and the sealing assembly comprises a first sealing ring and a second sealing ring, the first sealing ring is sleeved on the outside of the sleeve and is located between the chain plate and the chain link, and the second sealing ring is sleeved on the outside of the first sealing ring.

[0005] On the basis of the above scheme and as a preferred scheme of the above scheme: the inner circumferential surface of the second sealing ring is provided with an inward radial protrusion, and the outer circumferential surface of the second sealing ring is provided with a limiting groove matched with the radial protrusion.

[0006] On the basis of the above scheme and as a preferred scheme of the above scheme: the second sealing ring is provided with two upper and lower radial protrusions, and the first sealing ring is provided with two corresponding limiting grooves.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: an arc-shaped protrusion is arranged on the outer side of the second sealing ring, and a plurality of the arc-shaped protrusions are evenly spaced along the axial direction.

[0008] On the basis of the above solution and as a preferred solution of the above solution: the first sealing ring is made of rubber material.

[0009] On the basis of the above solution and as a preferred solution of the above solution: the second sealing ring is made of a polytetrafluoroethylene mixture.

[0010] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects: the utility model installs the combined sealing structure on the outside of the shaft sleeve, and the sealing effect can be enhanced by the inner and outer double sealing ring structures. If the outer sealing ring is damaged, the inner layer can be used as a spare to prevent leakage. The two layers of sealing rings can distribute the pressure more evenly, reducing the pressure on a single sealing ring, thereby reducing the risk of wear and failure. The two sealing rings are made of different materials, the inner ring is relatively softer, and the outer ring is harder and can resist external pressure. The use of a PTFE mixture with added copper powder can significantly increase the wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the sealing ring installation;

[0012] Figure 2 is a schematic diagram of the sealing assembly;

[0013] Figure 3 Schematic diagram of the second sealing ring. DETAILED DESCRIPTION

[0014] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments. However, the specific implementation methods and embodiments described below are for illustrative purposes only and are not intended to limit the present invention.

[0015] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate directions or positional relationships based on the attached Figure 1 The directions or positional relationships shown are only for the convenience of describing the present invention, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0016] In the description of this application, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0017] In order to solve the above technical problems, Figure 1-3As shown, the utility model designs a sealing ring chain, including a chain link 1, a chain plate 2, a pin shaft 3, a sleeve 4, and a sealing assembly. Each of the chain plates 2 is matched with two chain links 1 through two pin shafts 3. The pin shaft 3 passes through the through holes corresponding to the chain link 1 and the chain plate 2. The sleeve 4 is sleeved on the outside of the pin shaft 3. The sealing assembly includes a first sealing ring 5 and a second sealing ring 6. The first sealing ring 5 is sleeved on the outside of the sleeve 4 and is located between the chain plate 2 and the chain link 1. The second sealing ring 6 is sleeved on the outside of the first sealing ring 5. Specifically, the inner circumferential surface of the second sealing ring 6 is provided with an inward radial protrusion 7, and the outer circumference of the second sealing ring 6 is provided with a radial protrusion 7 facing inward. The circumferential surface is provided with a limiting groove adapted to the radial protrusion 7, and preferably the second sealing ring 6 is provided with two upper and lower radial protrusions 7, and the first sealing ring 5 is also provided with two corresponding limiting grooves. The first sealing ring 5 and the second sealing ring 6 can be connected as a whole through the adaptation of the radial protrusion 7 and the limiting groove, and the mutual bite structure is more stable. The combined sealing structure is installed on the outside of the shaft sleeve, and the sealing effect can be enhanced by the inner and outer double sealing ring structure. If the outer sealing ring is damaged, the inner layer can be used as a spare to prevent leakage. The two layers of sealing rings can distribute the pressure more evenly, reduce the pressure on a single sealing ring, and thus reduce the risk of wear and failure.

[0018] Based on the above embodiment, further improvements are made. Taking into account that the outer second sealing ring 6 plays a protective role, an arc-shaped protrusion 8 is provided on the outer side of the second sealing ring 6. Several of the arc-shaped protrusions 8 are evenly spaced along the axial direction, which can enhance the structural stability and deformation resistance of the second sealing ring 6.

[0019] Furthermore, the first sealing ring 5 is made of rubber material, and the second sealing ring 6 is made of a polytetrafluoroethylene mixture, preferably a PTFE material mixed with copper powder. The two sealing rings are made of different materials, the inner ring is relatively softer, and the outer ring is harder and can resist external pressure. The use of a PTFE mixture with added copper powder can significantly increase wear resistance.

[0020] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made by technicians in the relevant technical field based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing ring chain, characterized in that: It includes chain links, chain plates, pins, sleeves, and sealing components. Each chain plate cooperates with two chain links through two pins. The pins pass through the through holes corresponding to the chain links and chain plates. The sleeve is sleeved on the outside of the pins. The sealing component includes a first sealing ring and a second sealing ring. The first sealing ring is sleeved on the outside of the sleeve and located between the chain plates and the chain links. The second sealing ring is sleeved on the outside of the first sealing ring.

2. A sealing ring chain according to claim 1, characterized in that: The inner circumferential surface of the second sealing ring is provided with an inwardly facing radial protrusion, and the outer circumferential surface of the second sealing ring is provided with a limiting groove matched with the radial protrusion.

3. A sealing ring chain according to claim 2, characterized in that: The second sealing ring is provided with two upper and lower radial protrusions, and the first sealing ring is provided with two corresponding limiting grooves.

4. A sealing ring chain according to claim 3, characterized in that: An arc-shaped protrusion is arranged on the outer side of the second sealing ring, and a plurality of the arc-shaped protrusions are evenly spaced along the axial direction.

5. A sealing ring chain according to claim 1, characterized in that: The first sealing ring is made of rubber.

6. A sealing ring chain according to claim 1, characterized in that: The second sealing ring is made of a polytetrafluoroethylene mixture.

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