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Unlockable nut in paster-type free beam longitudinal torsion state switching working mode

A modal conversion and working mode technology, applied in the direction of nuts, screws, bolts, etc., can solve the problems of restricting the application of threaded pair fasteners and transmission parts, high production cost, and complicated operation, and achieves simple structure and production cost. Low, the effect of expanding the field of application

Inactive Publication Date: 2015-04-08
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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  • Unlockable nut in paster-type free beam longitudinal torsion state switching working mode
  • Unlockable nut in paster-type free beam longitudinal torsion state switching working mode
  • Unlockable nut in paster-type free beam longitudinal torsion state switching working mode

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specific Embodiment approach 1

[0015] Specific implementation mode one: see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 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;

[0016] 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 ...

specific Embodiment approach 2

[0017] Specific implementation mode two: see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 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

[0018] Specific implementation mode three: see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 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 an unlockable nut in a paster-type free beam longitudinal torsion state switching working mode, and belongs to the field of fasteners and transmission members connected by screw thread pairs. The unlockable nut achieves switching and controlling of a self-locking working state and an unlocking working state of screw thread pairs conveniently, quickly and flexibly. One or more separate-excitation extension pieces are arranged on each plane on the circumference of a nut matrix in a free beam state of the unlockable nut; a plurality of deep grooves or a plurality of columns of small holes are formed in the planes on the circumference of the nut matrix; all the separate-excitation extension pieces on the same circumference can be driven independently or in groups; drive phase differences of the adjacent separate-excitation extension pieces on each plane are 180 degrees; the quantities of the separate-excitation extension pieces on the two sides of a flange plate are equal; relative positions of the separate-excitation extension pieces on the two sides of the flange plate are symmetrical; and drive phases of the separate-excitation extension pieces on the two sides of the flange plate are symmetrical and identical. According to the unlockable nut, the self-locking working state of the nut matrix can be changed to the unblocking working state when the separate-excitation extension pieces input separate-excitation drive signals, that is a friction coefficient between the screw thread pairs is reduced greatly, so that the self-locking working state between the nut matrix and a screw rod 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): F16B37/00F16B39/02F16H25/24
Inventor 程廷海包钢唐晚静
Owner HARBIN INST OF TECH
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