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Anti-leakage double-surface pulling rivet and double-surface tight connecting method

A rivet, double-sided technology, applied to rivets, engine seals, engine components, etc., can solve the problems of dripping, leakage, and insufficient leakage prevention of rivet seals, and achieve the effect of improving corrosion resistance and attenuating vibration frequency

Active Publication Date: 2017-08-18
MEISHAN CRRC FASTENING SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art. The purpose is to provide a leak-proof double-sided fastening connection method and a leak-proof double-sided pull rivet, which solves the lack of leak-proof sealing of the existing pull rivets. Fitting gap, there is a riveting gap between the rivet and the surface of the riveted part, which is prone to leakage and dripping

Method used

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  • Anti-leakage double-surface pulling rivet and double-surface tight connecting method
  • Anti-leakage double-surface pulling rivet and double-surface tight connecting method
  • Anti-leakage double-surface pulling rivet and double-surface tight connecting method

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Experimental program
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Effect test

Embodiment

[0048] Such as Figure 2-5 12, a leak-proof double-sided pull rivet of the present invention comprises a rivet 1, a collar 2 and a sealing ring 3, the rivet 1 is composed of a rivet head 4 and a rivet rod 5, and the pull rivet 5 and the rivet head The integral molding structure is adopted, and the inner end surface of the rivet head 4 is provided with a ring-shaped groove 6 around the rivet rod 5, and the sealing ring 3 is arranged in the ring-shaped groove 6 to play a role of connection and sealing when the connection is fastened. The collar 2 The riveted part 11 is fastened and connected by the rivet 1 sleeved on the riveting rod 5 . The collar structure adopts the existing collar structure.

[0049] The riveting rod 5 is successively divided into a polished rod 7, a locking groove section 8, a breaking groove section 9 and a tail pulling groove section 10 from the connecting end with the rivet cap head 4.

[0050] The polished rod section 7 is a polished rod structure for...

Embodiment 2

[0053] Such as Figure 6 , 6-1 , 8, 8-1, 9, 9-1, and 13, a leak-proof double-sided pull rivet of the present invention, on the basis of Embodiment 1, the inner ring wall of the annular groove (6) There is a transition step between (16) and the outer circle of the polished rod section (7). The transition step is generally 0.4mm-4mm. By leaving a ring-shaped platform on the inner end surface of the rivet cap head 4 between the ring surface of the inner ring wall of the ring groove 6 and the ring surface of the polished rod section, it is mainly used for parts with higher leak-proof and waterproof requirements. , Avoid direct contact of the sealing ring with the edge of the riveting hole, reduce the shear fatigue effect of the edge of the riveting hole (acute angle) on the sealing ring, reduce the risk of the sealing ring being damaged, and improve the service life.

[0054] When the riveted product has relatively higher leak-proof requirements, using the riveting of the prese...

Embodiment 3

[0061] Such as Figure 7 , 7-1 , 10, 11, and 14, a leak-proof double-sided pull rivet of the present invention, on the basis of Embodiment 1, the inner ring wall of the annular groove 6 is smoothly connected with the outer circular surface of the polished rod section 7, and the annular groove 6 The angle between the wall surface of the outer ring and the inner end surface of the rivet cap head 4 is rounded. When the matching gap between the riveting rod 5 and the riveting hole 12 was relatively large, there was no need to stay an annular platform between the inner wall surface of the annular groove 6 and the outer circular surface of the polished rod section 7, and the inner wall surface of the annular groove 6 and the outer surface of the polished rod section 7 The outer circular surface of the polished rod section 7 is smoothly connected. When the sealing ring 3 is squeezed, the inner edge of the sealing ring 3 will be squeezed into the gap to play a sealing role. At the sa...

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Abstract

The invention discloses an anti-leakage double-surface pulling rivet and a double-surface tight connecting method. The anti-leakage double-surface pulling rivet comprises a rivet, a lantern ring and a sealing ring; the rivet consists of a rivet cap and a pulling rivet rod; the end of the pulling rivet rod and the inner end surface of the rivet cap form an integrally molded structure; an annular groove for surrounding the pulling rivet rod is formed in the inner end surface of the rivet cap; the sealing ring is arranged in the annular groove for achieving a sealing effect in tight connection; and the lantern ring is sleeved on the pulling rivet rod to connect a riveted piece through riveting. A gap between a rivet hole and the rivet and a gap between the rivet cap and the riveted piece are eliminated; and a special structural design is adopted to tightly match with the sealing piece to achieve the purpose of leakage prevention. The anti-leakage double-surface pulling rivet has such characteristics as high connecting strength, good leakage prevention, high corrosion resistance and convenience to install.

Description

technical field [0001] The invention relates to the field of rivets, in particular to a leak-proof double-sided pull rivet and a double-sided fastening connection method. Background technique [0002] Rivets are used to fasten multiple workpieces to each other. For example, the common blind riveting applied on the roof of SQ6 railway wagon (such as figure 1 ), although the riveted parts are tightly bonded and have good structural strength after riveting, due to the roughness and unevenness of the contact surface between the riveted parts and the rivets, there are always gaps through which water molecules can pass. It will cause water leakage and rain leakage. [0003] In addition, the existing leak-proof rivet riveting (such as Picture 1-1 and Figure 1-2 ), the riveting structure is not suitable for the riveting of structural parts, the pressing force acts directly on the sealing ring, which will easily lead to aging and leakage of the sealing ring under the long-term ...

Claims

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Application Information

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IPC IPC(8): F16B19/06F16J15/10B21J15/02
CPCF16B19/008F16B19/06F16J15/10B21J15/02
Inventor 张欣刘宇李新荣贾云龙何旭代广成范亚锋张荣何智慧肖长玖张钦徐建平
Owner MEISHAN CRRC FASTENING SYST CO LTD
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