Waterproof screw

Abstract

The utility model discloses a waterproof screw. The waterproof screw comprises a nut, a screw rod section and a waterproof gasket. A groove is formed in the inner end face of the nut. The waterproof gasket is arranged on the screw rod section in a sleeving mode, a flange is formed on the outer end face of the waterproof gasket and embedded into the groove so that the nut can be fixedly connected with the waterproof gasket, the outer end face of the waterproof gasket can be stably attached to the nut, and external seepage water does not easily enter the position between the inner end face of the waterproof gasket and the nut and is blocked outside a barrier formed by the flange. And the groove can limit the expansion of the inner hole wall of the waterproof gasket, prevent the waterproof gasket from loosening from the screw rod section and limit the expansion of the gap. The peripheral edge of the waterproof gasket extends to form a circle of extension skirt edge, a plurality of waterproof walls are formed on the inner end face of the waterproof gasket in a protruding mode and are sequentially and concentrically arranged from inside to outside, and the extension skirt edge and the waterproof walls tightly abut against the installation face under the downward pressing effect of the nut. And a plurality of barriers are formed to prevent external seeping water from invading between the mounting surface and the waterproof gasket.

Description

Technical Field

[0001] The utility model relates to the technical field of screws, in particular to waterproof screws. Background Art

[0002] Screws, also known as screws, include threaded fasteners consisting of a nut as a head structure and a screw segment connected to the nut. They are a common fastener and are widely used in many industries such as machinery, electricity, transportation, and aerospace.

[0003] There are certain waterproofing requirements for the places where screws are installed on outdoor equipment. If ordinary screws are used, a certain size of gap will inevitably appear between the screw segment and the screw hole, and rainwater can enter the interior of the component through the gap between the screw segment and the screw hole, causing water accumulation inside the equipment, and then causing serious problems such as equipment short circuit.

[0004] In the prior art, a sealing rubber ring is sleeved on the screw segment of an ordinary screw to seal the gap to achieve a waterproof effect. However, when the screw is locked into a screw hole on a mounting surface such as a device surface, the nut will squeeze the sealing rubber ring below, causing the sealing rubber ring to deform and loosen from the screw segment. The inner hole wall in contact with the screw segment will expand to expose the gap between the screw segment, and water can penetrate from between the sealing rubber ring and the mounting surface along the end face of the sealing rubber ring.

[0005] Therefore, under the influence of the above problems, the waterproof effect of the existing waterproof screws with sealing rubber rings still needs to be improved. Utility Model Content

[0006] In view of this, the purpose of the present invention is to provide a waterproof screw to solve the above problem.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0008] The utility model provides a waterproof screw, which comprises a nut, a screw rod section and a waterproof gasket.

[0009] A groove is formed on the inner end surface of the nut, which is concave toward the outer end surface of the nut, and the groove is arranged around the center point of the inner end surface of the nut; the screw section is connected to the center point of the inner end surface of the nut; the waterproof gasket is sleeved on the screw section, and a flange is formed on the outer end surface of the waterproof gasket, which is arranged around the center point of its outer end surface, and the flange is embedded in the groove of the nut to connect and fix the nut to the waterproof gasket, and a circle of extended skirt is formed on the outer peripheral edge of the waterproof gasket in the direction away from the flange, and a plurality of waterproof walls are convexly formed on the inner end surface of the waterproof gasket, and the plurality of waterproof walls are concentrically arranged from the inside to the outside along the radial direction of the waterproof gasket from the center point of the waterproof gasket.

[0010] Preferably, the groove of the nut is in the shape of an annular groove, the bottom of the groove of the nut is a horizontal plane, and the radial length of the groove gradually decreases in the direction of increasing depth toward the bottom of the groove.

[0011] Preferably, the upper end surface of the flange of the waterproof gasket is in the shape of an arc ring.

[0012] Preferably, the waterproof wall and the extended skirt form a plurality of concentric circular ring structures.

[0013] Preferably, the inner wall of the extended skirt is flush with the outer peripheral edge of the nut.

[0014] Preferably, the waterproof gasket is a rubber ring or a PVC rubber ring.

[0015] Preferably, along the inner end surface of the waterproof gasket in the direction away from the flange, the thickness of the waterproof wall is half the thickness of the extended skirt.

[0016] Preferably, the depth of the groove of the nut is 0.15-0.25 mm, the length of the screw section is 9.1-9.9 mm, and the thickness of the extended skirt is 0.7-0.9 mm.

[0017] The technical effects achieved by the technical solution of the utility model include:

[0018] The waterproof screw uses the flange of the waterproof gasket to fit tightly with the groove of the nut, so that the outer end face of the waterproof gasket can be stably fitted to the nut, and external water seepage is not easy to enter between the inner end face of the waterproof gasket and the nut 1, so that even if the inner hole wall of the waterproof gasket used to be sleeved on the screw segment is deformed and the gap between the screw segment is exposed, the external water seepage will be blocked outside the barrier formed by the flange, and the groove can limit the expansion of the inner hole wall of the waterproof gasket, prevent the waterproof gasket from loosening from the screw segment, and limit the expansion of the gap;

[0019] When the waterproof screw is locked into the screw hole on the mounting surface, the outer skirt and multiple waterproof walls will be tightly abutted against the mounting surface under the downward pressure of the nut. If external water seepage wants to invade from between the mounting surface and the inner end surface of the waterproof gasket, the outer skirt and waterproof wall of the waterproof gasket will form multiple barriers to block the inflow of external water seepage;

[0020] The waterproof gasket can also prevent the inner end face of the nut from directly applying excessive pressure to the surface of the installation location, reduce the possibility of damage to the installation location, and play a buffering and protective role for the installation surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the waterproof screw provided by the embodiment of the utility model;

[0022] Figure 2 For the corresponding Figure 1 A schematic structural diagram of the nut of the waterproof screw;

[0023] Figure 3 A schematic diagram of one side of the inner end surface of the waterproof washer in the waterproof screw;

[0024] Figure 4 For the corresponding Figure 1 A schematic diagram of the structure of the waterproof gasket described in;

[0025] Figure 5 It is a top view of the waterproof screw.

[0026] The reference numerals in the above drawings are:

[0027] Nut 1, inner end face 1a of the nut, outer end face 1b of the nut, groove 10, screw segment 2, waterproof gasket 3, inner end face 3a of the waterproof gasket, outer end face 3b of the waterproof gasket, inner hole wall 30, flange 31, extended skirt 32, waterproof wall 33. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model clearer, the specific embodiments of the utility model are described in detail below in conjunction with the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the utility model shown in the accompanying drawings and described according to the accompanying drawings are merely exemplary, and the utility model is not limited to these embodiments.

[0029] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solution according to the present invention are shown in the accompanying drawings, while other details that are not very relevant are omitted.

[0030] like Figure 1 As shown, an embodiment of the utility model provides a waterproof screw, which includes a nut 1, a screw section 2 and a waterproof gasket 3.

[0031] Reference Figures 2 to 4 As shown, a groove 10 is formed on the inner end surface 1a of the nut 1 and is concave toward the outer end surface 1b of the nut 1. The groove 10 is arranged around the center point of the inner end surface 1a of the nut 1;

[0032] The screw segment 2 is connected to the center point of the inner end surface 1a of the nut 1;

[0033] The waterproof gasket 3 is sleeved on the screw segment 2, and a flange 31 is formed on the outer end surface 3b of the waterproof gasket 3 around the center point of the outer end surface 3b. The flange 31 is embedded in the groove 10 of the nut 1, so that the nut 1 is connected and fixed to the waterproof gasket 3. Figure 5 As shown, the outer peripheral edge of the waterproof gasket 3 is extended in the direction away from the flange 31 to form a circle of extended skirt 32, and the inner end surface 3a of the waterproof gasket 3 is raised to form a plurality of waterproof walls 33. The plurality of waterproof walls 33 are concentrically arranged in sequence from the inside to the outside along the radial direction of the waterproof gasket 3 from the center point of the waterproof gasket 3.

[0034] The waterproof screw provided by the embodiment of the utility model utilizes the flange 31 of the waterproof gasket 3 to closely fit with the groove 10 of the nut 1, so that the outer end face 3b of the waterproof gasket 3 can be stably fitted to the nut 1, and external water seepage is not easy to enter between the inner end face of the waterproof gasket 3 and the nut 1, so that even if the inner hole wall 30 of the waterproof gasket 3 used to be sleeved on the screw segment 2 is deformed to expose the gap between the screw segment 2, the external water seepage will be blocked outside the barrier formed by the flange 31, and the groove 10 can limit the expansion of the inner hole wall 30 of the waterproof gasket 3, prevent the waterproof gasket 3 from loosening from the screw segment 2, and limit the expansion of the gap. When the waterproof screw is locked into the screw hole on the installation surface, the outer skirt 32 and multiple waterproof walls 33 will be tightly abutted against the installation surface under the downward pressure of the nut 1. If external water seepage wants to invade from between the installation surface and the inner end face 3a of the waterproof gasket 3, the outer skirt 32 and waterproof walls 33 of the waterproof gasket 3 will form multiple barriers to block the inflow of external water seepage. With the screw metal gasket and nut and other components, it can be more stable and achieve a better waterproof effect. In addition, the waterproof gasket 3 can also prevent the inner end face 1a of the nut 1 from directly applying excessive pressure to the surface of the installation location, reduce the possibility of damage to the installation location, and play a buffering and protective role on the installation surface.

[0035] In this embodiment, the groove 10 of the nut 1 is in the shape of an annular groove, and the bottom of the groove 10 of the nut 1 is a horizontal plane. The radial length of the groove 10 of the nut 1 gradually decreases in the direction of increasing depth toward the bottom of the groove, thereby forming a deep groove structure with a narrow bottom and a wide top for the groove 10, so that it is easy to form an interference fit with the flange 31 of the waterproof gasket 3, and the connection is more stable.

[0036] To match the structure of the groove 10 of the nut 1, the upper end surface of the flange 31 of the waterproof gasket 3 is an arc-shaped ring. In the direction in which the thickness of the flange of the waterproof gasket increases, the radial length of the flange of the waterproof gasket gradually decreases, and the circular area decreases.

[0037] Exemplarily, the waterproof wall 33 and the extended skirt 32 form a plurality of concentric ring structures. The arrangement of the concentric ring structures enables the inner end surface 3a of the waterproof gasket 3 to resist water infiltration in a balanced manner at all locations, and is convenient for processing and manufacturing.

[0038] The area of ​​the extended skirt 32 is relatively small. To prevent the extended skirt 32 from extending beyond the peripheral edge of the waterproof gasket 3 and being easily damaged, the inner wall of the extended skirt 32 is flush with the peripheral edge of the nut 1 .

[0039] In this embodiment, the waterproof gasket 3 is a rubber ring or a PVC rubber ring. The materials of rubber and PVC have certain elasticity and are strong and durable, which are very suitable for the waterproof structure of the waterproof gasket 3.

[0040] Specifically, along the direction of the inner end surface 3 a of the waterproof gasket 3 facing away from the flange 31 , the thickness of the waterproof wall 33 is half of the thickness of the extended skirt 32 .

[0041] Combination Figure 1 and Figure 2 As shown, the preferred specifications and dimensions of the upper part structure of the waterproof screw are as follows:

[0042] The depth H1 of the groove 10 of the nut 1 is 0.15-0.25 mm, the length L1 of the screw segment 2 is 9.1-9.9 mm, and the thickness H2 of the extended skirt 32 is 0.7-0.9 mm.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0044] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A waterproof screw, characterized in that: include: A nut (1), wherein a groove (10) is formed on the inner end surface (1a) of the nut (1) and is concave toward the outer end surface (1b) of the nut (1), and the groove (10) is arranged around the center point of the inner end surface (1a) of the nut (1); A screw segment (2), wherein the screw segment (2) is connected to the center point of the inner end surface (1a) of the nut (1); A waterproof gasket (3) is sleeved on the screw section (2); a flange (31) is formed on the outer end surface (3b) of the waterproof gasket (3) and is arranged around the center point of the outer end surface (3b); the flange (31) is embedded in the groove (10) of the nut (1) so that the nut (1) and the waterproof gasket (3) are connected and fixed; an outer peripheral edge of the waterproof gasket (3) is formed with a circle of extended skirt (32) extending in a direction away from the flange (31); a plurality of waterproof walls (33) are protruded on the inner end surface (3a) of the waterproof gasket (3); the plurality of waterproof walls (33) are arranged concentrically in sequence from the inside to the outside from the center point of the waterproof gasket (3) along the radial direction of the waterproof gasket (3).

2. The waterproof screw according to claim 1, characterized in that: The groove (10) of the nut (1) is in the shape of an annular groove, the groove bottom of the groove (10) of the nut (1) is a horizontal plane, and the radial length of the groove (10) of the nut (1) gradually decreases in the direction of increasing depth toward the groove bottom.

3. The waterproof screw according to claim 1, characterized in that: The upper end surface of the flange (31) of the waterproof gasket (3) is in the shape of an arc ring.

4. The waterproof screw according to claim 1, characterized in that: The waterproof wall (33) and the extended skirt (32) form a plurality of concentric circular ring structures.

5. The waterproof screw according to claim 1, characterized in that: The inner wall of the extended skirt (32) is flush with the outer peripheral edge of the nut (1).

6. The waterproof screw according to claim 1, characterized in that: The waterproof gasket (3) is a rubber ring or a PVC rubber ring.

7. The waterproof screw according to claim 1, characterized in that: Along the inner end surface (3a) of the waterproof gasket (3) in the direction away from the flange (31), the thickness of the waterproof wall (33) is half the thickness of the extended skirt (32).

8. The waterproof screw according to claim 1, characterized in that: The depth of the groove (10) of the nut (1) is 0.15 to 0.25 mm, the length of the screw section (2) is 9.1 to 9.9 mm, and the thickness of the extended skirt (32) is 0.7 to 0.9 mm.

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