Split type plug

Abstract

The utility model relates to a split type plug which comprises an outer sleeve made of an elastic material and internally provided with a center hole, and an inner sleeve made of an elastic material, the inner plug is coaxially nested in the center hole and can be in interference fit with the outer sleeve; when the inner plug is in interference fit with the outer sleeve, the outer sleeve deforms and expands outwards, so that the outer sleeve is in interference fit with the inner wall of a product hole to be plugged, and the product hole is plugged tightly. The plug adopts a split type structure, and the inner plug is in interference fit with the outer sleeve, so that the plug and a product are tightly clamped, and the plug is not easy to fall off. The problem that an existing rubber plug is loosened and falls off due to size difference is solved. When in use, plugging can be realized only by slightly placing the outer sleeve and then inserting the inner plug. During taking out, the outer sleeve can be easily taken out only through the inner plug. The rubber plug solves the problem that an existing rubber plug needs to be plugged tightly with force during use due to the size difference, and then taking-out is difficult.

Description

Technical Field

[0001] The utility model relates to the technical field of plugs, in particular to a split plug. Background Art

[0002] At present, the traditional fuel vehicle industry has gradually increased the water cooling system for turbocharged gas products, and new energy vehicles even have water-cooled and air-cooled motor casings. Such products have strict requirements for water channels and air channels, and foreign objects are not allowed to exist. Therefore, during the production process of product castings, it is necessary to block the water channels and air channel openings and then perform surface shot peening operations.

[0003] In the prior art, the following problems exist when plugs are used for casting water channels and air channel holes:

[0004] The conventional casting tolerance of castings is CT7 level, that is, the hole diameter is 0 - 10 mm, and the corresponding tolerance is ±0.37; the hole diameter is 10 - 16 mm, and the corresponding tolerance is ±0.39. The corresponding dimensional tolerances of rubber plugs are ±0.1 and ±0.2 respectively. The difference in dimensional tolerances between the rubber plugs and the castings makes the rubber plugs mismatched during use. When the casting hole size is larger and the plug size is smaller, the plug is loose and easy to fall off. On the contrary, the plug cannot be inserted in place and needs to be forced to plug. This results in poor consistency of the casting hole size. In addition, the surface of the conventional rubber plug is smooth and is easy to fall off during the shot peening process of the casting. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a split plug, and the purpose is to improve the stability of the fit between the plug and the hole.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A split plug, the split plug comprising:

[0008] An outer sleeve, which is made of an elastic material, and a central hole is formed inside the outer sleeve;

[0009] An inner plug, which is coaxially nested in the central hole and can be in interference fit with the outer sleeve;

[0010] When the inner plug is in interference fit with the outer sleeve, the outer sleeve deforms and expands outwards, so that the outer sleeve is in interference fit with the inner wall of the product hole to be plugged, and the product hole is tightly plugged.

[0011] A further technical solution is:

[0012] The inner diameter of the central hole gradually decreases from the bottom end to the top end of the outer sleeve.

[0013] The structure of the inner plug includes a supporting part, the supporting part is columnar, the diameter of the column gradually increases from the bottom end to the top end, and the minimum outer diameter of the supporting part is greater than the minimum inner diameter of the central hole.

[0014] A limiting part with an increasing diameter is arranged below the supporting part.

[0015] The structure of the outer sleeve includes a neck and a stepped part;

[0016] The neck is used for interference fit with the product hole, and the neck is frustum-shaped;

[0017] The stepped part is used for axially limiting the interference fit, and the outer diameter of the stepped part is greater than the inner diameter of the product hole.

[0018] At least one slit is provided on the neck, dividing the neck into at least two units along the circumferential direction, and each unit is fan-shaped.

[0019] The slit is V-shaped.

[0020] The at least one slit is evenly distributed at equal intervals along the circumferential direction of the neck.

[0021] A threaded structure is provided on the outer surface of the stepped part.

[0022] The inner plug is made of an elastic material.

[0023] The beneficial effects of the present utility model are as follows:

[0024] The plug of the present utility model adopts a split structure. Through the interference fit between the inner plug and the outer sleeve, the plug is tightly attached to the product and is not easy to fall off. It solves the problem of loosening and falling off of the existing rubber plug caused by size differences.

[0025] The plug of the present invention adopts a split structure. When in use, only need to gently put the outer sleeve in, and then insert the inner plug to achieve sealing. When taking out, only the inner plug is needed to easily take out the outer sleeve. It solves the problem that when using the existing rubber plug, it is necessary to forcefully plug the plug due to size differences, which causes difficulty in taking out.

[0026] A single plug of the present utility model can be adapted to plug holes with multiple apertures. Compared with conventional plugs, it has strong versatility and reduces management costs at the same time.

[0027] The threaded structure is added to the outer sleeve of the present utility model, which helps to tightly attach to the product and prevent it from falling off.

[0028] Other features and advantages of the present utility model will be described in the subsequent specification, or will be understood by implementing the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1Schematic diagram of the exploded structure of the embodiment of the present utility model.

[0030] Figure 2 Cross-sectional view of the outer sleeve of the embodiment of the present utility model.

[0031] Figure 3 Cross-sectional view of the inner plug of the embodiment of the present utility model.

[0032] Figure 4 Schematic diagram of the structure of the embodiment of the present utility model in cooperation with the airway or waterway to be blocked.

[0033] Figure 5 is Figure 4 cross-sectional view of.

[0034] Figure 6 Schematic diagram of the structure of the embodiment of the present utility model in the first step during use.

[0035] In the figure: 1. Outer sleeve; 2. Inner plug; 3. Airway or waterway; 11. Neck; 12. Step portion; 21. Support portion; 22. Limiting portion; 111. Thread structure; 112. Gap; 113. Central hole; 31. Product hole. Specific embodiments

[0036] The following describes the specific embodiments of the present utility model with reference to the accompanying drawings.

[0037] As Figures 1 to 3 shown, the split plug of this embodiment includes:

[0038] An outer sleeve 1, which is made of an elastic material, and a central hole 113 is formed inside the outer sleeve 1;

[0039] An inner plug 2, which is coaxially nested in the central hole 113 and can be in interference fit with the outer sleeve 1;

[0040] When the inner plug 2 is in interference fit with the outer sleeve 1, the outer sleeve 1 deforms and expands outwards, so that the outer sleeve 1 is in interference fit with the inner wall of the product hole to be blocked, and the product hole is tightly blocked.

[0041] Specifically, the inner diameter of the central hole 113 gradually decreases from the bottom end to the top end of the outer sleeve 1. Correspondingly, the structure of the inner plug 2 includes a support portion 21, the support portion 21 is columnar, the diameter of the columnar shape gradually increases from the bottom end to the top end, and the minimum outer diameter of the support portion 21 is greater than the minimum inner diameter of the central hole 113.

[0042] The structure of the outer sleeve 1 includes a neck 11 and a step portion 12. The neck 11 is used for interference fit with the product hole 31, and the step portion 12 is used for axial limitation of the interference fit.

[0043] Preferably, the neck 11 is frustum-shaped, and the diameter of the frustum shape gradually decreases from bottom to top.

[0044] Specifically, the outer diameter of the step portion 12 is larger than the inner diameter of the product hole.

[0045] In order to further enhance the deformation amplitude of the outer sleeve 1 during interference fit, at least one slit 112 is provided on the neck portion 11, dividing the neck portion 11 into at least two units in the circumferential direction, and each unit is fan-shaped.

[0046] Preferably, the slit 112 is V-shaped. That is, the width of the slit 112 gradually increases from bottom to top.

[0047] Preferably, at least one slit 112 is evenly distributed at equal intervals along the circumferential direction of the neck portion 11.

[0048] In order to increase the friction between the outer sleeve and the product hole, a threaded structure 111 is provided on the outer surface of the step portion 12 in this embodiment.

[0049] As a preferred method, the inner plug 2 also uses an elastic material.

[0050] Specifically, a limiting portion 22 with an increased diameter is provided below the supporting portion 21 of the inner plug 2 to axially limit the supporting portion 21 during interference fit.

[0051] Preferably, the surface of the supporting portion 21 of the inner plug 2 is smooth.

[0052] Specifically, the elastic material in this embodiment is rubber.

[0053] See Figures 4 to 6 , the usage process of this embodiment is as follows:

[0054] First, insert the outer sleeve 1 into the product hole 31 to be blocked in the air duct or water duct 3, as Figure 6 shown;

[0055] Insert the inner plug 2 into the central hole 113 of the outer sleeve 1. Since the designed diameter of the outer circle of the supporting portion 21 of the inner plug 2 is larger than the designed diameter of its mating surface with the central hole 113 of the outer sleeve 1, an interference fit is formed between the outer sleeve 1 and the inner plug 2. Thus, the inner plug 2 will extrude the outer sleeve 1 outwards, realizing the interference fit between the outer sleeve 1 and the product hole 31 and achieving the tight gripping of the plug. When the plug needs to be removed, pull out the inner plug 2, and the outer sleeve 1 will recover its deformation and can be easily pulled out from the hole.

[0056] Among them, the threaded structure on the outer surface of the outer sleeve 1 increases the friction and prevents the plug from falling off.

[0057] Those of ordinary skill in the art can understand that the above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A split plug, characterized in that, The split plug includes: An outer sleeve (1) made of an elastic material, with a central hole (113) formed therein; An inner plug (2) coaxially nested within the central hole (113) and capable of interference fit with the outer sleeve (1); When the inner plug (2) is in interference fit with the outer sleeve (1), the outer sleeve (1) deforms and expands outwards, so that the outer sleeve (1) is in interference fit with the inner wall of the product hole (31) to be plugged, and the product hole (31) is tightly plugged.

2. The split plug according to claim 1, wherein, The inner diameter of the central hole (113) gradually decreases from the bottom end to the top end of the outer sleeve (1).

3. The split plug according to claim 2, wherein, The structure of the inner plug (2) includes a support portion (21), the support portion (21) is columnar, the diameter of the column gradually increases from the bottom end to the top end, and the minimum outer diameter of the support portion (21) is greater than the minimum inner diameter of the central hole (113).

4. The split plug according to claim 3, characterized in that, A limiting portion (22) with an increasing diameter is provided below the support portion (21).

5. The split plug according to claim 1, characterized in that, The structure of the outer sleeve (1) includes a neck portion (11) and a stepped portion (12); The neck portion (11) is used for interference fit with the product hole (31), and the neck portion (11) is frustum-shaped; The stepped portion (12) is used for axially limiting the interference fit, and the outer diameter of the stepped portion (12) is greater than the inner diameter of the product hole (31).

6. The split plug according to claim 5, characterized in that At least one slit (112) is provided on the neck portion (11), dividing the neck portion (11) into at least two units in the circumferential direction, and each unit is fan-shaped.

7. The split plug according to claim 6, characterized in that, The slit (112) is V-shaped.

8. The split plug according to claim 6, characterized in that, The at least one slit (112) is evenly distributed at equal intervals in the circumferential direction of the neck portion (11).

9. The split plug according to claim 5, wherein, A threaded structure (111) is provided on the outer surface of the stepped portion (12).

10. The split plug according to claim 1, characterized in that, The inner plug (2) is made of an elastic material.

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