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R-shaped thread

A thread and thread technology, applied in the field of fasteners, can solve the problems of large local stress, unbalanced force on thread teeth, and low repeated service life of fasteners, so as to achieve increased anti-loosening friction and good force transmission. Effect

Active Publication Date: 2016-04-13
阳江市贯虹五金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The local stress of a single thread is very large, resulting in uneven stress on the threads of the thread, so the repeated service life of the fastener is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1, with reference to Figure 1 to Figure 3 ,as well as Figure 6 to Figure 10 .

[0049] Such as figure 1 with image 3 As shown, in the R-shaped thread provided by this embodiment, the two sides of the thread profile are the first lead-in side corner line 101 and the second lead-in side corner line 102, and the first lead-in side corner line 101 and the second lead-in side corner line The lines 102 are connected by a transition line 103, and the transition line 103 is recessed away from the crest.

[0050] It should be noted that: "Thread profile" determines the geometric shape of the thread, including the diameter of the workpiece (outer diameter, middle diameter and inner diameter), and the main parameters include thread profile angle, profile angle, pitch, helix angle, number of heads, etc. . The "first lead-in side corner line 101" and "second lead-in side corner line 102" refer to the sides on both sides of the crest. The "transition line 103" is ...

Embodiment 2

[0061] Embodiment 2, with reference to Figure 4 with Figure 5 .

[0062] Such as Figure 4 with Figure 5 As shown, the transition line 103 of the R-shaped thread provided by the present application can also be formed by connecting multi-segment line segments 105, and the angle range of the intersection angle between adjacent line segments is 90° to 180°. It should be noted that: here "Cross angle" means the angle towards the crest. Or it is formed by connecting multiple segments of curves 106 . The transition line 103 can be arc-shaped, and can also be formed by connecting multi-segment line segments 105, which can also achieve the effect of automatic anti-loosening. The transition line 103 is preferably an arc 104 , and the effect of the transition line 103 formed by connecting multiple curves 106 is equivalent to that of the arc 104 and the transition line 103 .

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Abstract

The invention provides an R-shaped thread, and belongs to the field of fasteners. A first guiding-in side angle line and a second guiding-in side angle line are arranged on the two side edges of a thread profile respectively and are connected through a transition line. The transition line is concaved in the direction away from a crest. According to the technical scheme, the defect that an existing thread is prone to loosening after being assembled is overcome, and the R-shaped thread with the seismic preventing and loosening preventing functions is provided.

Description

technical field [0001] The invention relates to the field of fasteners, in particular to an R-shaped screw thread. Background technique [0002] Since the first industrial revolution, the rapid development of fasteners has played a very important role in the rapid development of industry. However, the existing fasteners all have a fatal weakness - they will loosen by themselves in severe vibrations. Threads are inseparable from modern society. Loosening of fasteners may cause damage or disintegration of components or a complete piece of equipment, or cause major safety accidents. For example, when the Boeing Company of the United States investigated the frequent accidents of 737 passenger planes, it was found that the bolts of the wings of the aircraft fell off as one of the reasons. A Remos GX aircraft crashed fatally during the American Sports Air Show in Sebring, Florida, when a fastener on one aileron was not fastened, killing a photographer and seriously injuring the ...

Claims

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Application Information

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IPC IPC(8): F16B39/30
CPCF16B39/30F16B33/02F16B35/04
Inventor 霍永久
Owner 阳江市贯虹五金科技有限公司
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