Stepless adjustable double-head anti-loosening spring nut assembly

Abstract

The invention discloses an infinitely adjustable double-head anti-loosening spring nut assembly, which comprises a spring nut, a flat hexagonal sheet metal nut and a spring, wherein a spring is installed inside the spring nut, a flat hexagonal sheet metal nut is arranged at the bottom end of the spring, a hexagonal support body is arranged at the bottom end of the spring nut, a spring nut rear thread is arranged on one side of the top end of the hexagonal support body, and a spring nut front thread is arranged on the other side, a flat hexagonal sheet metal nut front thread is arranged on one side of the top end of the flat hexagonal sheet metal nut, and a flat hexagonal sheet metal nut rear thread is arranged on one side, while the anti-loosening effect of the fastener is increased, the pressure on the surface of the connected part can also be reduced, the thread distance can be infinitely adjusted, and the precise matching of the internal and external threads of the fastening connection can be achieved, so that the spring and the nut are integrated, which is convenient for fastening and disassembly, and has a simple structure, strong versatility, simple manufacturing process, light weight and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of fasteners in mechanical engineering, in particular to a stepless adjustable distance double-head anti-loosening spring nut assembly. Background Art

[0002] With the development of science and technology and the improvement of energy-saving and environmental protection awareness, new requirements are constantly being put forward for the fastening connections of mechanical equipment and tools in the fields of aerospace, transportation, electronics, photovoltaics and new energy industries. However, due to the rigidity and single helical surface matching of existing fasteners, there are large pre-tightening forces and uneven force on the threads, which lead to damage to the bolts, their threads and connected parts. Especially in threaded connections with vibrating machinery and environments with large wind forces and temperature differences, anti-vibration and anti-slip accessories must be installed. When there are special needs for precision and safety threaded connections, the material and manufacturing process requirements for bolts and hexagonal nuts are particularly high. In terms of fastener anti-loosening technology, from the basic configuration of spring washers and flat washers to anti-loosening technology, it has gradually developed to tightening between double nuts, notching the circumference of the middle round nut, threaded holes through the outer circle + countersunk screws, + built-in staggered cam wedges, variable tooth profiles and other thread structure improvements and shape memory alloy intelligent anti-loosening technologies, in addition to increasing the difficulty of fastener manufacturing, it also brings difficulties in installation and maintenance.

[0003] Therefore, it is necessary to invent a stepless adjustable double-head anti-loosening spring nut assembly to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a stepless adjustable double-head anti-loosening spring nut assembly to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an infinitely adjustable double-head anti-loosening spring nut assembly, comprising a spring nut, a flat hexagonal sheet metal nut and a spring, wherein a spring is installed inside the spring nut, a flat hexagonal sheet metal nut is arranged at the bottom end of the spring, a hexagonal support body is arranged at the bottom end of the spring nut, a spring nut rear thread is arranged on one side of the top end of the hexagonal support body, and a spring nut front thread is arranged on the other side, a flat hexagonal sheet metal nut front thread is arranged on one side of the top end of the flat hexagonal sheet metal nut, and a flat hexagonal sheet metal nut rear thread is arranged on one side.

[0006] Preferably, the stepless adjustable double-head anti-loosening spring nut assembly:

[0007] 1) Form spring nuts and inner hexagonal sheet metal nuts by stamping metal sheets;

[0008] 2) Install the spring inside the spring nut;

[0009] 3) Place the top of the flat hexagonal sheet metal nut against the bottom side of the spring and insert it into the bottom end of the spring nut.

[0010] Preferably, the axial distance between the two threads of the steplessly adjustable double-head anti-loosening spring nut is not only adjusted by the spring, but also can be adjusted by the relative position of the hexagonal surface of the spring nut and the internally buckled flat hexagonal sheet metal nut; the adjustment range is six sixths of the pitch.

[0011] Preferably, according to the needs of the connected parts, the material thickness of the flat hexagonal sheet metal nut can be equal to, greater than, or less than the material thickness of the spring nut, and the thread angles of the threads can be inconsistent, so as to achieve the corresponding matching of the pitch and its thread specifications with the external threads of the bolt.

[0012] Preferably, the flat hexagonal sheet metal nut can be further stamped into flanges of various shapes.

[0013] Technical effects and advantages of the present invention:

[0014] The present invention is provided with a spring nut, a spring nut front thread, a spring nut rear thread, a six-sided support body, a flat hexagonal sheet metal nut, a flat hexagonal sheet metal nut front thread, a flat hexagonal sheet metal nut rear thread and a spring. While increasing the anti-loosening effect of the fastener, it can also reduce the pressure on the surface of the connected part, and the thread distance can be infinitely adjusted, and the precise matching of the internal and external threads of the fastening connection can be achieved, so that the spring and the nut are integrated, which is convenient for fastening and disassembly. The present invention also has a simple structure, strong versatility, a simple manufacturing process, light weight and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front cross-sectional view of the present invention.

[0016] Figure 2 It is a bottom sectional view of the present invention.

[0017] Figure 3 It is a three-dimensional diagram of the flat hexagonal sheet metal nut of the present invention.

[0018] Figure 4 It is a stereogram of the present invention.

[0019] In the figure: 1 spring nut, 11 spring nut front thread, 12 spring nut rear thread, 13 hexahedral support body, 2 flat hexagonal sheet metal nut, 21 flat hexagonal sheet metal nut front thread, 22 flat hexagonal sheet metal nut rear thread, 3 spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The present invention provides an infinitely adjustable double-head anti-loosening spring nut assembly as shown in the figure, comprising a spring nut 1, a flat hexagonal sheet metal nut 2 and a spring 3, wherein the spring nut 1 is installed with the spring 3 inside, the bottom end of the spring 3 is provided with the flat hexagonal sheet metal nut 2, the bottom end of the spring nut 1 is provided with a hexagonal support body 13, the top side of the hexagonal support body 13 is provided with a spring nut rear thread 12, and the other side is provided with a spring nut front thread 11, the top side of the flat hexagonal sheet metal nut 2 is provided with a flat hexagonal sheet metal nut front thread 21, and one side is provided with a flat hexagonal sheet metal nut rear thread 22.

[0022] Working principle of the present invention:

[0023] Referring to the drawings in the specification, the steplessly adjustable double-head anti-loosening spring nut assembly of the present invention is composed of a spring nut 1, a flat hexagonal sheet metal nut 2 and a spring 3. The spring nut 1 and the flat hexagonal sheet metal nut 2 are both made of metal sheets by stamping to form sheet metal threads with two approximate pitches consistent with the external thread of the bolt, and the stepless adjustment of the axial distance of the two threads is achieved by the built-in spring 3; the initial angle of the two sheet metal threads is greater than the tooth angle of the external thread of the bolt, and as the tightening proceeds, it gradually tends to be consistent with the tooth angle of the external thread of the bolt, so as to generate an elastic force between the helical surfaces meshing with the external thread of the bolt, and at the same time, as the spring nut 1 is compressed, it forms a tightening of the connected part and has a certain elastic force.

[0024] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An infinitely adjustable double-head anti-loosening spring nut assembly, comprising a spring nut (1), a flat hexagonal sheet metal nut (2) and a spring (3), characterized in that: A spring (3) is installed inside the spring nut (1), a flat hexagonal sheet metal nut (2) is arranged at the bottom end of the spring (3), a six-sided support body (13) is arranged at the bottom end of the spring nut (1), a spring nut rear thread (12) is arranged on one side of the top end of the six-sided support body (13), and a spring nut front thread (11) is arranged on the other side, and a flat hexagonal sheet metal nut front thread (21) is arranged on one side of the top end of the flat hexagonal sheet metal nut (2), and a flat hexagonal sheet metal nut rear thread (22) is arranged on one side; The metal sheet is formed into a spring nut (1) and an inner hexagonal sheet metal nut (2) by stamping; The spring (3) is built into the inner space of the spring nut (1); Place the top of the flat hexagonal sheet metal nut (2) against the bottom of the spring (3) and insert it into the bottom of the spring nut (1).

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