Anti-blow-by fastener
By adding pressure cushioning structure and guide air holes in the fastener, combined with sealing rubber ring and soft magnet ring, the gas leakage problem is solved, the sealing property and cushioning capacity of air pressure fluctuations are improved, and a better sealing effect is achieved.
Patent Information
- Application Number
- CN202420488259.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-13
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-03-13
AI Technical Summary
Existing fasteners cannot effectively inhibit gas leakage through the bolt holes, resulting in contamination.
Add pressure buffering structure between bolts and nuts, including sealing rings and expansion folding layers, combined with guide pores and shock-proof structures, reducing gas leakage using elasticity and adsorption.
Effectively prevent gas from bleeding, improve sealing, reduce gas leakage, and enhance the buffering ability of air pressure fluctuations.
Smart Images
Figure CN222185372U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of fasteners, and in particular to an anti-gas blowby fastener. Background Art
[0002] In the prior art, a nut is used to fix two or more fixed parts together by cooperating with a bolt, and a gasket is used to adjust the gap between them. This is called a fastener.
[0003] However, in some structural connectors, the air pressure on one side may fluctuate, and the gas on one side may easily leak through the bolt holes, causing contamination. Existing fasteners cannot suppress the gas passing through the bolt holes. In response to the above-mentioned related technologies, the applicant has proposed a fastener that prevents gas leakage on one side. Utility Model Content
[0004] In order to suppress the gas on one side of the screw hole from escaping to the other side and improve the sealing performance of the fastener to the screw hole, the present application provides an anti-gas escaping fastener.
[0005] The present application provides an anti-gas fastener adopting the following technical solution:
[0006] A gas blowby prevention fastener comprises a bolt and a nut threaded on the bolt, a washer is sleeved near the upper end of the bolt, the inner ring of the washer is sealed and connected to the bolt, a pressure buffer structure is sleeved on the outer ring of the washer, one end of the pressure sliding buffer structure is fixed to the side of the washer near the bolt head, and the other end is bent, extended and positioned on the surface of the connecting piece, the inner side of the washer is connected to the pressure buffer structure, and the connecting part is arranged corresponding to the bending part of the pressure buffer structure.
[0007] By adopting the above technical solution, a pressure buffer structure is added between the bolt and the nut. When the pressure at the nut changes, the pressure buffer structure releases the impact force through elasticity to prevent the occurrence of gas blowby.
[0008] Preferably, the pressure buffer structure includes a sealing rubber ring and an expansion folded layer. The upper end of the sealing rubber ring is sleeved and fixed on the upper end of the gasket. The sealing rubber ring extends downward and the bottom is closed inward. The expansion folded layer is arranged at the upper end of the sealing rubber ring, and the expansion folded layer is arranged in multiple layers along the side wall of the sealing gasket.
[0009] By adopting the above technical solution, the expanded folded layer has better scaling ability, which can better buffer the changes brought about by the air pressure. At the same time, the directional exhaust of the guide air holes can reduce the leakage of gas from the opening of the sealing gasket, further preventing the occurrence of blowby.
[0010] Preferably, a plurality of guide air holes are provided at intervals on the side wall of the gasket, the guide air holes are connected to the inner side of the gasket and the inner side of the sealing rubber ring, and the height of the guide air holes is arranged corresponding to the position of the expansion folding layer.
[0011] Preferably, a ring-shaped soft magnet ring is fixed at the bottom closing portion of the sealing rubber ring, and the soft magnet ring is accommodated inside the sealing rubber ring.
[0012] By adopting the above technical solution, the sealing rubber ring uses the adsorption of soft magnets to achieve a better sealing effect at the closing part, while reducing the internal space occupied by the sealing rubber ring and more effectively buffering the air pressure changes.
[0013] Preferably, an anti-impact structure is provided on the nut, the anti-impact structure includes a nut washer and a bending air duct, the nut washer is fixed to the side of the nut close to the upper end of the bolt; the bending air duct is opened in the nut, and the two ends of the bending air duct are respectively located at the upper and lower ends of the nut, and the bending air duct is bent at least twice inside the nut; the opening of the bending air duct close to the side of the nut washer is accommodated on the inner side of the nut washer.
[0014] By adopting the above technical solution, the anti-impact structure can directionally guide the airflow, thereby slowing down the airflow velocity and more effectively coping with air pressure fluctuations.
[0015] Preferably, an interference fit rubber ring having an inner ring of the washer is fixed on the nut.
[0016] In summary, the present application includes at least one of the following beneficial technical effects:
[0017] 1. A pressure buffer structure is added between the bolt and the nut. When the pressure at the nut changes, the pressure buffer structure releases the impact force through elasticity to prevent the occurrence of blowby;
[0018] 2. The expansion folding layer has better scaling ability, which can better buffer the changes brought by air pressure. At the same time, it cooperates with the directional exhaust of the guide air holes to reduce the leakage of gas from the opening of the sealing gasket, and further prevent the occurrence of blowby;
[0019] 3. The sealing rubber ring uses soft magnets to absorb the sealing rubber ring to achieve better sealing effect, while reducing the internal space occupied by the sealing rubber ring and more effectively buffering air pressure changes. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;
[0021] Figure 2 It is a cross-sectional view showing the internal structure of an embodiment of the present application.
[0022] Explanation of the accompanying drawings: 1. Bolt; 2. Nut; 3. Washer; 4. Pressure buffer structure; 41. Sealing rubber ring; 42. Expansion folding layer; 5. Guide air hole; 6. Soft magnetic ring; 7. Anti-impact structure; 71. Nut washer; 72. Bending air duct; 8. Interference rubber ring. DETAILED DESCRIPTION
[0023] The present application is further described in detail below in conjunction with the accompanying drawings.
[0024] The present application embodiment discloses an anti-gas fastener, referring to Figure 1 , including a bolt 1 and a nut 2 threaded on the bolt 1, the nut 2 corresponds to the side of the air pressure fluctuation; a washer 3 is sleeved near the upper end of the bolt 1, an interference rubber ring 8 with an interference fit on the inner ring of the washer 3 is fixed on the nut 2, the inner ring of the washer 3 is sleeved and sealed on the interference rubber ring 8, and the outer ring of the washer 3 is sleeved with a pressure buffer structure 4 for buffering pressure fluctuations.
[0025] Reference Figure 1 The buffer structure includes a sealing rubber ring 41 and an expansion folding layer 42. The upper end of the sealing rubber ring 41 is sleeved and fixed on the upper end of the gasket 3. The sealing rubber ring 41 extends downward and the bottom is closed inward. A ring-shaped soft magnetic ring 6 is fixed at the bottom of the sealing rubber ring 41. The soft magnetic ring 6 is accommodated on the inner side of the sealing rubber ring 41, so as to keep close to the surface of the connector and increase the gas buffer space.
[0026] The expanded folded layer 42 is arranged at the upper end of the sealing rubber ring 41, and the expanded folded layer 42 is arranged in multiple layers along the side wall of the sealing gasket 3; a number of guide air holes 5 are arranged at intervals on the side wall of the gasket 3, and the guide air holes 5 connect the inner side of the gasket 3 and the inner side of the sealing rubber ring 41. The guide air holes 5 are arranged at a height corresponding to the position of the expanded folded layer 42, thereby reducing the impact of the guide air holes 5 on the opening of the sealing rubber ring 41 and preventing air leakage.
[0027] An anti-impact structure 7 is provided on the nut 2, and the anti-impact structure 7 includes a nut 2 washer 3 and a bent air duct 72. The nut 2 washer 3 is fixed to the side of the nut 2 close to the upper end of the bolt 1; the bent air duct 72 is opened on the nut 2, and the two ends of the bent air duct 72 are respectively located at the upper and lower ends of the nut 2, and the bent air duct 72 is bent at least twice inside the nut 2; the opening of the bent air duct 72 close to the side of the washer 3 of the nut 2 is accommodated inside the washer 3 of the nut 2, thereby reducing the impact force caused by the air pressure change.
[0028] The working process of the present application is: tighten the bolt 1 and the nut 2, and the nut 2 corresponds to the side of the air pressure fluctuation. When the air pressure fluctuation occurs on one side of the nut 2, the air pressure is transmitted through the bent air duct 72, and the airflow is restricted by the washer 3 of the nut 2 and transmitted outward through the bent air duct 72. The airflow is decelerated by the bending of the bent air duct 72, thereby reducing the impact force on the screw hole.
[0029] When the airflow is transmitted to the gasket 3 through the screw hole, the inner ring of the gasket 3 and the interference fit rubber ring 8 cooperate to prevent the airflow from passing through. The airflow enters the sealing rubber ring 41 through the guide air hole 5. The expanded folded layer 42 of the sealing rubber ring 41 actively reduces shock and expands and contracts in accordance with the change of air pressure, so that the gas stays inside the sealing rubber ring 41 to prevent leakage.
[0030] When the air pressure fluctuation on one side of the nut 2 stops, the sealing rubber ring 41 releases excess air through the bent air passage 72, thereby returning to a normal state.
[0031] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A gas blowby prevention fastener, comprising a bolt (1) and a nut (2) threadedly connected to the bolt (1), wherein a washer (3) is sleeved near the upper end of the bolt (1), and characterized in that: The inner ring of the gasket (3) is sealingly connected to the bolt (1), and the outer ring of the gasket (3) is provided with a pressure buffer structure (4). One end of the pressure buffer structure is fixed to the side of the gasket (3) close to the head of the bolt (1), and the other end is bent and extended and positioned on the surface of the connecting piece. The inner side of the gasket (3) is connected to the pressure buffer structure (4), and the connection point is arranged corresponding to the bending point of the pressure buffer structure (4).
2. The anti-gas fastener according to claim 1, characterized in that: The pressure buffer structure (4) comprises a sealing rubber ring (41) and an expansion folding layer (42); the upper end of the sealing rubber ring (41) is sleeved and fixed on the upper end of the gasket (3); the sealing rubber ring (41) extends downward and the bottom is closed inward; the expansion folding layer (42) is arranged at the upper end of the sealing rubber ring (41); the expansion folding layer (42) is arranged in multiple layers along the side wall of the sealing gasket (3).
3. The anti-gas fastener according to claim 2, characterized in that: The side wall of the gasket (3) is provided with a plurality of guide air holes (5) at intervals, the guide air holes (5) being connected to the inner side of the gasket (3) and the inner side of the sealing rubber ring (41), and the guide air holes (5) are arranged at a height corresponding to the position of the expansion folding layer (42).
4. The anti-gas fastener according to claim 2, characterized in that: A soft magnetic ring (6) arranged in an annular shape is fixed at the bottom closing portion of the sealing rubber ring (41), and the soft magnetic ring (6) is accommodated inside the sealing rubber ring (41).
5. The anti-gas fastener according to claim 1, characterized in that: The nut (2) is provided with an impact-proof structure (7), which comprises a nut (2) washer (3) and a bending air passage (72), wherein the nut (2) washer (3) is fixed to a side of the nut (2) close to the upper end of the bolt (1); the bending air passage (72) is opened on the nut (2), and the two ends of the bending air passage (72) are respectively located at the upper and lower ends of the nut (2), and the bending air passage (72) is bent at least twice inside the nut (2); the opening of the bending air passage (72) close to a side of the nut (2) washer (3) is accommodated inside the nut (2) washer (3).
6. The anti-gas fastener according to claim 2, characterized in that: The nut (2) is fixed with an interference fit rubber ring (8) which is an inner ring of the washer (3).