Anti-crushing flange bolt

A technology for crushing flange surfaces and bolts, which is applied in the field of fasteners and can solve problems such as crushing and easy scratches

Pending Publication Date: 2019-11-12
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem that the existing flange surface bolts are easy to scratch and crush the surface of the connected parts, and provide an anti-crushing flange surface bolt, which will not be crushed, scratch the surface of the connected parts, and be clamped tightly. Stronger force, not easy to loose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] see figure 1 with figure 2 , an anti-collapse flange bolt, comprising a bolt head 1, a bolt shank 3, and a flange 2 connected between the screw head 1 and the bolt shank 3, the flange 2 The side facing the bolt shank 3 is the flange bottom surface 21, the flange bottom surface 21 is an inner concave surface, and the flange bottom surface 21 protrudes downward near the flange cylindrical surface 22. The bottom surface of the flange 21 is a line segment inclined downward in the axial section, and the downward inclination angle is 1°. The cylindrical surface 22 of the flange portion is provided with an annular groove 23; the radial depth t2 of the annular groove 23 is the same as that of the flange portion The ratio of the radial distance t1 from the lowest point on the bottom surface 21 to the cylindrical surface 22 of the flange is equal to 2:1.

[0043] see image 3 , the axial section of the annular groove 23 is V-shaped, wherein the upper wall surface of the annul...

Embodiment 2

[0049] see figure 1 with figure 2 , an anti-collapse flange bolt, comprising a bolt head 1, a bolt shank 3, and a flange 2 connected between the screw head 1 and the bolt shank 3, the flange 2 The side facing the bolt shank 3 is the flange bottom surface 21, the flange bottom surface 21 is an inner concave surface, and the flange bottom surface 21 protrudes downward near the flange cylindrical surface 22. The bottom surface 21 of the flange part is a line segment inclined downward in the axial section, and the downward slope angle is 1.5°. The cylindrical surface 22 of the flange part is provided with an annular groove 23 . The ratio of the radial depth t2 of the annular groove 23 to the radial distance t1 from the lowest point on the bottom surface 21 of the flange to the cylindrical surface 22 of the flange is equal to 3:1;

[0050] see Figure 4 , the axial section of the annular groove 23 is V-shaped, wherein the lower wall surface of the annular groove 23 is perpendic...

Embodiment 3

[0055] see figure 1 with figure 2 , an anti-collapse flange bolt, comprising a bolt head 1, a bolt shank 3, and a flange 2 connected between the screw head 1 and the bolt shank 3, the flange 2 The side facing the bolt shank 3 is the flange bottom surface 21, the flange bottom surface 21 is an inner concave surface, and the flange bottom surface 21 protrudes downward near the flange cylindrical surface 22. The bottom surface of the flange portion 21 is a line segment inclined downward in the axial section, and the downward slope angle is 2°. The cylindrical surface 22 of the flange portion is provided with an annular groove 23 . The ratio of the radial depth t2 of the annular groove 23 to the radial distance t1 from the lowest point on the bottom surface 21 of the flange part to the cylindrical surface 22 of the flange part is equal to 2.5:1.

[0056] see Figure 5 , the axial section of the annular groove 23 is V-shaped, wherein the lower wall surface and the upper wall su...

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Abstract

The invention discloses an anti-crushing flange bolt, and belongs to the field of fasteners. The anti-crushing flange bolt comprises a bolt head (1), a bolt rod part (3) and a flange part (2), whereinthe flange part (2) is connected between the bolt head (1) and the bolt rod part (3); the surface, facing the bolt rod part (3), of the flange part (2) is provided with a flange part bottom surface (21), and the flange part bottom surface (21) is an inner concave surface; the position, close to a flange part cylindrical surface (22), of the flange part bottom surface (21) protrudes downwards; anannular groove (23) is formed in the flange part cylindrical surface (22); and the radial depth (t2) of the annular groove (23) is greater than or equal to the radial distance (t1) from the lowest point on the flange part bottom surface (21) to the flange part cylindrical surface (22). The anti-crushing flange bolt has the advantages that the surface of a part to be connected cannot be crushed andscraped, the pressing force is stronger, and looseness is not liable to occur.

Description

technical field [0001] The invention relates to bolts in the field of fasteners, in particular to an anti-crushing flange surface bolt. Background technique [0002] As one of the most commonly used fasteners, flange bolts are widely used in the industrial field. GB / T16674.1-2016 introduces a hexagonal flange face bolt, the flange face is a slope with a certain angle, and the inclination angle is usually reversed 0.25°-1.25°. During the tightening process of the bolt, when the flange surface and the surface of the connected part start to contact, the contact part is the outer edge of the bolt flange surface. As the tightening torque gradually increases, the flange surface gradually changes from the line contact of the outer edge to the surface contact, and the flange surface also begins to deform elastically, and finally realizes the bonding between the flange surface and the surface of the connected part, and the angle of the flange surface becomes 0°. At the same time, ...

Claims

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Application Information

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IPC IPC(8): F16B39/284F16B35/06F16B33/00
CPCF16B39/284F16B35/06F16B33/004
Inventor 倪剑锋柴恒燕马冲冲
Owner DONGFENG COMML VEHICLE CO LTD
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