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Surface-mounted type nut with free beam longitudinal working mode and capable of being unlocked

A technology of working mode and longitudinal vibration, applied in the direction of nuts, screws, bolts, etc., can solve the problems of limiting the application occasions of threaded fasteners and transmission parts, high production cost, cumbersome operation, etc., and achieves simple structure and low production cost , Expand the effect of the application field

Inactive Publication Date: 2015-04-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, for the conversion and control of the two working states of self-locking and unlocking between thread pairs, it is often necessary to use a self-locking nut with self-locking function and a corresponding unlocking mechanism to work together. The self-locking and unlocking state conversion mechanism has problems such as complex structure, cumbersome operation, and high production cost, which limits the application occasions of threaded fasteners and transmission parts

Method used

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  • Surface-mounted type nut with free beam longitudinal working mode and capable of being unlocked
  • Surface-mounted type nut with free beam longitudinal working mode and capable of being unlocked
  • Surface-mounted type nut with free beam longitudinal working mode and capable of being unlocked

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Experimental program
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specific Embodiment approach 1

[0013] Specific implementation mode one: see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 To illustrate, this specific embodiment is composed of a nut base 1 in a free beam state, and a plurality of other-excited telescopic sheets 2;

[0014] The nut base 1 in the free beam state is a free beam restraint method, and the middle part of the nut base 1 in the free beam state is provided with a flange 1-4, and several positioning points for installation and fixing are processed on the plane of the flange 1-4. Holes 1-3; internal threads 1-2 are arranged on the inner circle surface of the nut base 1 in the free beam state, and the internal threads 1-2 of the nut base 1 in the free beam state are rotatably connected with screw rods 1-5 and internal threads 1 The thread lead angle of -2 is smaller than the equivalent friction angle between the internal thread 1-2 and the threaded pair of the screw rod 1-5; on the outer circular surface of the nut base 1 in ...

specific Embodiment approach 2

[0015] Specific implementation mode two: see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 To illustrate, the difference between this embodiment and the first embodiment is that the other-excited elastic sheet 2 is a piezoelectric elastic sheet, and its driving frequency coincides with or is close to the resonant frequency of the nut base 1 in the free beam state. The nut matrix 1 in the excited free beam state is in an ultrasonic vibration state; the driving electrical signal waveform of the piezoelectric stretchable sheet can be a sinusoidal alternating current signal, a square alternating electric signal, a triangular alternating current signal or a zigzag alternating electric signal. Other compositions and connections are the same as in the first embodiment.

specific Embodiment approach 3

[0016] Specific implementation mode three: see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 To illustrate, the difference between this embodiment and the first embodiment is that the extensible stretchable sheet 2 is a magnetostrictive sheet, a photostrictive sheet or a thermostrictive sheet. Other compositions and connections are the same as in the first embodiment.

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Abstract

The invention discloses a surface-mounted type nut with a free beam longitudinal working mode and capable of being unlocked, and belongs to the field of fasteners and transmission parts with screw pairs utilized. The surface-mounted type nut with the free beam longitudinal working mode and capable of being unlocked can achieve conversion and control of two working states including self-locking and unlocking among the screw pairs conveniently, rapidly and flexibly. One or a plurality of activated type telescopic pieces are arranged on each plane of the circumference of a nut base body in a free beam state. All activated type telescopic pieces on the same circumference are driven independently or in a group-driving mode. When the group driving is conducted, the driving phase positions are the same. A driving phase difference of adjacent activated type telescopic pieces on each plane is 180 degrees, the numbers of driving activated type telescopic pieces on both sides of a flange plate are the same, and the relative positions are symmetrical and the driving phase positions are the same symmetrically. When activated type driving signals are input into the activated type telescopic pieces (2), the self-locking working state of the nut base body is changed into the unlocking working state, namely a friction coefficient among the screw pairs is reduced greatly, and the self-locking working state between the nut base body and a screw disappears.

Description

technical field [0001] The invention belongs to the field of fasteners and transmission parts connected by thread pairs. Background technique [0002] Fasteners and transmission parts based on thread pairs are widely used in equipment, systems, devices and mechanisms in various industries today. For the thread pair connection pair, there are mainly two working states, which are the thread self-locking state and the non-self-locking state, and the latter can also be called the unlocking state. For the self-locking working state of the thread pair, the thread pair used should generally meet the thread self-locking conditions, that is, the thread lead angle is smaller than the equivalent friction angle between the thread pairs. The main application occasions are fastening of parts, sliding transmission guide rails and Jacks and other aspects of force transmission; for the unlocking working state of the thread pair, that is, satisfying that the thread lift angle is greater than...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/00F16B37/00F16B39/02
Inventor 程廷海包钢
Owner HARBIN INST OF TECH