Self-tightening type anti-loosing and fastening device
An anti-loosening and self-tightening technology, applied in the direction of locking fasteners, threaded fasteners, connecting components, etc., can solve the problems of inability to perform motorized installation, bolts and nuts falling off by themselves, and troublesome operation during installation and disassembly. Reliable anti-seismic anti-loosening performance, increased anti-loosening friction, and the effect of anti-seismic and anti-loosening
Pending Publication Date: 2020-07-24
JIANGSU HANZHIJIN TECH CO LTD
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AI Technical Summary
Problems solved by technology
During the actual use of machinery using bolt and nut fasteners, due to the influence of complex working conditions, bolts and nuts will inevitably fall off by themselves in the environment of frequent vibration and alternating loads, which will cause danger in use
[0003] In order to solve the problem of fastening device loosening, scientists and engineers in many countries in the world have done a lot of experimental research. The anti-loosening fastening device originated from abroad, and usually adopts lock plate, pin, nylon embedding, deformed thread, chemical glue, etc. method, to a certain extent delayed the time for fasteners to loosen by themselves, but did not fundamentally solve the problem
There are many existing anti-loosening methods in China, among which is the non-removable anti-loosening method, which uses welding, bonding or punching point riveting to change the detachable threaded connection into a non-detachable threaded connection, which is a relatively reliable traditional anti-loosening method. method, but its disadvantages are also obvious, that is, threaded fasteners cannot be reused, and the operation is very troublesome when installing and dismounting
The other way is to use mechanical fasteners for anti-loosening. The principle is to use mechanical fasteners to fix and pin the threaded parts and the connected parts or between the threaded parts and the threaded parts to prevent loosening. The disadvantage is to increase the fastening connection. The weight, which also causes troubles in manufacturing and installation, can not be installed motorized, and the cost is higher
There is also an anti-loosening method that increases friction, which is to achieve the purpose of anti-loosening by increasing the friction between the threads or the end surface of the screw and nut, or increasing the friction between the two at the same time. The problem has not been fundamentally solved, and there are still multiple safety hazards, which are difficult to meet the needs of high standards, high safety and other complex environmental conditions
Method used
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Experimental program
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Embodiment 1
[0031] Such as figure 1 , Figure 5 As shown, the bolt thread is a 60° standard thread, and the front section of the nut is 60°. When the workpiece is pressed, the cusp of the external thread of the bolt can be tightly pressed against the wedge-shaped slope of the deformed thread in the front section, forming a normal pressure increase part, which increases the normal force generated by the contact between the threads, so the deformed thread in the front section The normal pressure is far greater than the fastening pressure, and the resulting anti-loosening friction is greatly increased; at the same time, when the bolt's external thread engages with the deformed internal thread of the nut at the front, the wedge-shaped inclined surface makes the load evenly distributed on the contacting section of the helix. In terms of length, it avoids more than 80% of the total load concentrated on the thread surfaces of the first and second teeth when the common thread is engaged, so that...
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The invention discloses a self-tightening type anti-loosing and fastening device to improve the anti-loosing performance of the device, reduce the manufacturing cost of products, and meet the requirements of high-standard high-safety and complex working condition environment. The self-tightening type anti-loosing and fastening device comprises a bolt, and a self-tightening type nut, wherein ordinary external threads and standard external threads are formed in the bolt; the self-tightening type nut consists of two sections of threads which are continuously deformed and have the effect of self-tightening; the front section deformation threads are used for fastening, and the rear section deformation threads are used for maintaining the effect of enlarging the anti-loosing capacity; the self-tightening type nut cooperates and is connected with the bolt, so that a clamped workpiece can be twisted tighter and tighter, or the clamped workpiece has definite pretightening force at any positionof the bolt. Through the adoption of the technical scheme of the self-tightening type anti-loosing and fastening device disclosed by the invention, reliable vibration proof and anti-loosing performance can be brought, the manufacturing cost and the repeated using rate of the nut are significantly increased, the service life of the nut is significantly prolonged, the situation that under various adverse working environments including frequent vibration, variation in load and the like, the screw thread pair in each link is not loosened is guaranteed, the real effect of anti-loosing locking is achieved, and the application range is wide.
Description
technical field [0001] The invention relates to an anti-loosening nut device and belongs to the technical field of anti-loosening and fastening workpieces. Background technique [0002] In production and life, the connection and assembly process is usually inseparable from fasteners, which bring convenience to the machinery industry. In the connection assembly, the bolt and nut connection is the most commonly used fastening structure. During the actual use of machinery using bolt and nut fasteners, due to the influence of complex working conditions, bolts and nuts will inevitably fall off by themselves in an environment of frequent vibration and alternating loads, which will cause danger in use. [0003] In order to solve the problem of fastening device loosening, scientists and engineers in many countries in the world have done a lot of experimental research. The anti-loosening fastening device originated from abroad, and usually adopts lock plate, pin, nylon embedding, de...
Claims
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IPC IPC(8): F16B39/30F16B33/02
CPCF16B33/02F16B39/30
Inventor 李武彬
Owner JIANGSU HANZHIJIN TECH CO LTD
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