CN101737393B

CN101737393B - High-efficiency peak-clipping and load-balancing threaded connection structure

Info

Publication number: CN101737393B
Application number: CN2010100280381A
Authority: CN
Inventors: 董万福; 聂志萍
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-01-07
Filing date: 2010-01-07
Publication date: 2012-07-25
Anticipated expiration: 2030-01-07
Also published as: CN101737393A

Abstract

The invention discloses a high-efficiency peak-clipping and load-balancing threaded connection structure. The threaded connection structure comprises a bolt (1) with an outer thread and a nut (2) with an inner thread, wherein the bolt (1) is matched with the nut (2); the thread pitches and tooth spaces of the outer thread on the bolt (1) are equal respectively; and the thread pitches of the inner thread on the nut (2) are equal, but the tooth spaces are gradually reduced from a load bearing end surface (3) of the nut (2) to the other end surface. The tooth spaces of the nut are regularly and gradually changed, so that the threaded connection structure thoroughly changes sequences and mechanisms that all threads enter a work load bearing state, realizes peak clipping of load when threads work, gives full play to load bearing capacity of all the thread teeth and can achieve load balance of each thread when the tooth spaces of the nut is in an optimal reasonable state.

Description

A kind of screw connection structure of peak-clipping and load-balancing

Technical field

The present invention relates to a kind of screw connection structure, particularly relate to a kind of screw connection structure of peak-clipping and load-balancing.

Background technique

It is exactly stand under load extreme inequality on the worm tooth that conventional threads connects a greatest problem that exists.(for the ease of explanation and research, among Fig. 1 screw thread being reduced to the plane annular tooth) as shown in Figure 1, no matter the concrete structure that is threaded how, the total pulling force F that bolt bore is that the facing through internal and external screw thread contacts and carries.Because the rigidity of internal and external threads and deformation properties are different, and the screw thread of the work of participation progresses into the work loaded state from supporting plane (3) to the other end, so the stressed size on the worm tooth is different and different with the position.When being threaded stand under load, bolt (1) receives tensile force f and is stretched, and pitch increases; Nut this moment (2) is stressed and is compressed, and pitch reduces, thereby the first lap screw thread load maximum (as shown in Figure 2) of bearing, and experimental research proves, about 1/3 total load, and last generally speaking a few circle screw thread carries hardly or carries very little.Owing to about 1/3 total load is born the peak load F that occurs being threaded by the first lap screw thread _Max, this peak load has limited the intensity that is threaded, and causes having the part screw thread not carry or carries very little.In order to improve the load situation that is threaded; Make full use of the bearing capacity that is threaded, forefathers have made big quantity research, have obtained very big achievement; But limit with mechanism because the working principle that screw thread carries reaches the order of respectively enclosing screw thread entering work loads state, do not have substantial breakthrough.

Summary of the invention

The object of the present invention is to provide a kind of screw connection structure of peak-clipping and load-balancing; The peak clipping of load when this screw connection structure can be realized screw thread work; Give full play to the bearing capacity of all worm tooths; When nut tooth spacing is in best rational state, can realize all carrying of every circle screw thread, thereby realize the optimization of screw connection structure.

For achieving the above object; The solution that the present invention adopts is: this screw connection structure comprise match have externally threaded bolt and a nut with internal thread; Externally threaded pitch and tooth spacing equate on the bolt; The pitch that nut (2) is gone up internal thread equates, but the tooth spacing reduces towards the other end from the bearing end of nut gradually, and the carrying end face of said nut is meant nut and the contacted end face of connected piece.

Working principle of the present invention is: when receiving loading when being threaded; What internal and external screw thread at first got into the contact carrying is inside and outside supporting plane the top one circle farthest, to screw screw thread (as shown in Figure 3); When load increases gradually, bolt is stretched, and nut is compressed; When the two algebraic sum equals the increment Delta of tooth spacing of the nut second circle screw thread, the second circle screw thread entering work loaded state.In like manner the 3rd circle, the 4th circle etc. progress into the work loaded state, the variation of appropriate design tooth spacing, all the carrying of every circle worm tooth of can realizing in theory being threaded.

The present invention is owing to the tooth spacing of the nut that is adopted reduces to the other end from carrying end face gradually; Therefore the present invention has thoroughly changed the order and the mechanism of respectively enclosing screw thread entering work loaded state; The peak clipping of load when having realized screw thread work; Give full play to the bearing capacity of all worm tooths, when the tooth spacing of nut is in best rational state, can realize all carrying of every circle screw thread.

Description of drawings

Structure and stressed schematic representation that Fig. 1 connects for conventional threads.

Fig. 2 is the stand under load distribution schematic diagram of conventional threads linkage structure shown in Figure 1.

Fig. 3 is structure of the present invention and stressed schematic representation.

Fig. 4 is a stand under load distribution schematic diagram of the present invention shown in Figure 3.

Embodiment

As shown in Figure 3, the present invention is made up of bolt that matches 1 and nut 2, is processed with the outside thread that pitch and tooth spacing equate on the bolt 1; Being processed with pitch on the nut 2 equates but the internal thread of tooth spacing gradual change; In the present embodiment, bolt 1 receives downward tensile force f and is stretched, and pitch increases; Nut 2 is stressed and is compressed, and for bringing into play the bearing capacity of all worm tooths, realizes peak-clipping and load-balancing as far as possible; Present embodiment is designed to the tooth spacing of nut 2 upwards to reduce gradually from the supporting plane 3 of nut 2, when receiving loading when being threaded like this, because the tooth spacing of the internal thread of the top one circle of nut 2 is minimum; So what at first get into carrying is inside and outside supporting plane 3 the top one circle farthest, to screw screw thread (as shown in Figure 3); When load increases gradually, bolt is stretched, and nut is compressed; When the two algebraic sum equals the increment Delta of tooth spacing of the nut second circle screw thread, the second circle screw thread entering work loaded state.In like manner the 3rd circle, the 4th circle etc. progress into the work loaded state.The present invention when the variation of tooth spacing is reasonable in design, all the carrying of every circle worm tooth of can realizing in theory being threaded (as shown in Figure 4).The rule of concrete tooth changes in spacing is determined by the material of the shape of stressed size, worm tooth and bolt, nut.

Claims

1. the screw connection structure of a peak-clipping and load-balancing; Comprise having externally threaded bolt (1) and having the nut (2) of internal thread of matching; Externally threaded pitch gone up by bolt (1) and the tooth spacing equates; The pitch that nut (2) is gone up internal thread equates, it is characterized in that: the tooth spacing that nut (2) is gone up internal thread reduces to the other end from the carrying end face (3) of nut (2) gradually, and the carrying end face (3) of said nut (2) is meant nut (2) and the contacted end face of connected piece.