High-strength arc thread connection pair

A threaded connection, high-strength technology, applied in the direction of connecting components, threaded fasteners, nuts, etc., can solve the problems of manual inspection and maintenance, difficult to find in time, connection is not smooth enough, broken or loose, etc., to achieve large axial fit clearance, The effect of high processing efficiency and small plastic deformation area of ​​metal

Pending Publication Date: 2019-07-02
CSIC HAIWEI ZHENGZHOU HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing general-purpose metric thread profile, the connection between the bolt and the nut, and the anchor bolt and the nut is not smooth enough, which is prone to stress concentration. Fracture or looseness occurs. Once failure occurs, it is difficult to find out in time through manual inspection and maintenance, and there are certain engineering hidden dangers.

Method used

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  • High-strength arc thread connection pair
  • High-strength arc thread connection pair
  • High-strength arc thread connection pair

Examples

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Embodiment Construction

[0028] The following specific embodiments will further illustrate the present invention in conjunction with the accompanying drawings.

[0029] In the accompanying drawings, d is the major diameter of the external thread, d 2 is the pitch diameter of the external thread, d 3 is the small diameter of the external thread, R 1 is the arc radius of the upper crest, R 2 is the arc radius of the lower tooth bottom, P is the pitch, θ 1 is the tooth profile angle of the external thread, H 1 is tooth height, D 1 is the small diameter of internal thread, D 2 Pitch diameter of internal thread, D is major diameter of internal thread, R 3 is the radius of the upper half arc, H 2 is tooth height, θ 2 is the thread angle of the internal thread, s 1 is the tooth thickness of the external thread, s 2 is the internal thread tooth thickness, m is the nut height, e is the diagonal length, and s is the opposite side length.

[0030] as attached Figure 1-8 As shown, a high-strength cir...

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Abstract

The invention discloses a high-strength arc thread connection pair. A bolt and a nut are provided with an internal arc thread and an external arc thread which are matched with each other, the internalarc thread and the external arc thread are connection threads with surface contact, a continuous arc thread on the bolt is an external thread, the external thread is composed of an upper crest arc, astraight line segment, a lower root arc and a straight line segment which are successively connected, the radius of the upper crest arc is the same as that of the lower root arc, and the straight line segments are tangent to the upper crest arc and the lower root arc correspondingly; and a continuous circular thread on the nut is an internal thread, the internal thread is composed of an upper half-round arc, a tangential straight line segment and a crest which are successively connected, the crest is a plane, the tangential straight line segment is tangent to the upper half-round arc. The arcthread connection pair adopts an arc thread form, the internal thread makes a surface contact with the external thread, stress is uniform, stress concentration during thread bearing can be effectively lowered, and the anti-fatigue performance is good.

Description

technical field [0001] The invention belongs to the technical field of bolt connection and anchor bolt connection of wind power generating set towers, and in particular relates to a high-strength arc thread connection pair. Background technique [0002] Thread connection is a common mechanical connection method, which has the advantages of simple structure, reliable connection, and convenient assembly and disassembly. "High-strength anchor bolt connection pair for steel structure" (GB / T 33943-2017) stipulates the technical requirements and size specifications of high-strength anchor bolt connection pair for M20-M64 steel structure, all of which adopt ordinary metric threads for general purposes. That is triangular thread. "Technical Requirements for the Installation of High-Strength Threaded Connections for Wind Power Generating Sets" (GB / T 33628-2017) stipulates the technical requirements for the installation of M6-M64 bolts, screws, studs and nuts in wind power generating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B33/02F16B33/06
CPCF16B33/02F16B33/06
Inventor 杨中桂刘萍都军民王建楹孟德明崔建国张永王自强
Owner CSIC HAIWEI ZHENGZHOU HIGH TECH CO LTD
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