CN206190708U - Threaded fastener companion - Google Patents

Abstract

A threaded fastener companion, the left end of the outer periphery is a regular hexagon, the right end is an outer conical boss, the inner hole is a standard triangular internal thread through the male nut and the other outer edge is a regular hexagon of the same specification, but the left end There is a section of internal tapered hole, and the right end is also formed by a female nut with standard triangular internal thread. The taper of the outer conical boss at the right end of the male nut corresponds to the taper of the inner conical hole at the left end of the female nut. On the outer conical boss of the male nut, at least one narrow blind groove extending along the central axis of the male nut is evenly distributed along the small end face, and terminates when there is still a certain distance from the end face of the regular hexagon. After the standard nut is tightened on the standard bolt according to the specification requirements, the male nut of the utility model is firstly tightened on the outer end surface of the standard nut, and the conical boss is located on the outside, and then the female nut is screwed in on the side with the inner conical hole. Make the inner conical hole contact with the outer conical boss of the male nut, and continue to pull the female nut to achieve the purpose of preventing the standard nut from loosening and retreating.

Description

Threaded Fastener Companion

technical field

The utility model relates to a fastener companion—especially a threaded fastener companion. It is used in conjunction with a standard fastening nut, which can increase the normal work of the standard fastening nut in occasions with frequent and severe vibrations, preventing The function of loosening belongs to the mechanical field.

Background technique

Since the predecessors invented and applied threaded fasteners, the equipment and facilities of all walks of life are inseparable from the wide application of threaded fasteners. It can be said that threaded fasteners have become classic products. In the next few decades, even It will not withdraw from the market and be eliminated in hundreds of years.

But its inherent disadvantage is that it is used in various equipment and facilities, especially in places with severe vibration, which often leads to accidents due to loose nuts. Tracing it to its cause is that threaded fastener bolts and nuts are used together, and when its inner and outer thread teeth are engaged, a gap must be left. This causes the gap to remain after the nut is tightened in place on the bolt. The gap can be decomposed into two types: axial gap and radial gap. At present, the products and methods widely used in the market and introduced in the literature to eliminate the gap mainly include flat washers, spring washers, double nuts, nuts with nylon inserts, metal insert nuts and hexagonal fastening nuts. However, most of them can only eliminate one of the axial gaps or radial gaps between the standard nut and the bolt thread in use, not both at the same time. Once the equipment and facilities vibrate frequently and violently, the function of preventing loosening and retreating will be lost immediately. In the current situation where expressways and high-speed trains are increasingly widely used, the requirements for anti-loosening and anti-retreat of threaded fasteners are getting higher and higher. At the same time, threaded fasteners that eliminate the axial gap and radial gap between the bolts and nuts during work take on this important task.

Contents of the invention

The content of this utility model is to provide a novel anti-loosening device for nuts—a threaded fastener companion, which is characterized in that it is used in conjunction with protected standard nuts, and its function is to hinder the protected standard nuts like a firewall Standing still in frequent and severe working conditions, to achieve the purpose of preventing loosening and retreating.

The utility model is composed of a male nut whose left end is a regular hexagon, and whose right end is an outer conical boss, and the outer edge is a regular hexagon with the same specification, but the left end has a section of inner conical hole, and the right end is also a standard triangular female nut. . The taper of the conical boss at the right end of the male nut corresponds to the taper of the inner conical hole at the left end of the female nut, and when the two are at the limit position of cooperation, the diameter of the small end of the outer conical boss of the male nut is larger than the inner conical hole of the female nut The diameter of the small end, and the size of the large end of the conical boss of the male nut should be greater than the diameter of the large end of the inner tapered hole at the left end of the female nut. In the direction of the end surface of the conical boss of the male nut, at least one blind slot with a narrow slit extending from the small end of the conical boss and extending along the central axis of the male nut is evenly arranged. termination. Each narrow slit blind groove passes through the internal threaded hole up and down. Two adjacent slit blind grooves are divided into at least one segment of arc-shaped internal thread wedges, and the left end of each wedge is fixedly connected with the regular hexagonal body, which has the function of elastic reset. The outer hexagonal dimensions, thread pitch, tooth shape, and total length of the male nut and the female nut all conform to the above parameters of the nut specified by the national standard of the same specification for ordinary thin nuts. The outer circumference of the female nut is a regular hexagon with the same specifications as the male nut. The taper of the inner conical hole at the left end corresponds to the taper of the outer conical boss of the male nut. The diameter of the large end of the conical hole should be smaller than that of the male nut. The diameter of the large end of the conical boss and the diameter of the small end should be smaller than the diameter of the small end of the conical boss of the male nut, and the number of teeth of the internal thread at the right end should be at least 1 tooth.

After the standard ordinary nut is tightened on the bolt according to the specification requirements, firstly, the outer end of the male nut of the present utility model is a regular hexagon facing inward, and the outer end is a conical boss, and the side is outwardly tightened with an ordinary wrench until the outer end of the male nut is The end face of the regular hexagon is close to the end face of the protected standard ordinary nut that has been tightened. At this time, turn the end of the female nut with the inner conical hole facing inward, and screw it on the bolt with an ordinary wrench until the inner circular hole of the female nut contacts the outer conical boss of the male nut. At this time, forcefully pull the regular hexagonal outer periphery of the female nut. Since at least one blind slot with narrow slits is evenly arranged on the conical boss of the male nut along the axial direction, if you continue to tighten the inner conical hole of the female nut, it will The internal thread of the conical boss divided by the two narrow blind grooves adjacent to the conical boss on the compression male nut forms a section of arc-shaped internal thread wedge, which is wedged tightly in the spiral groove of the bolt to eliminate the circle on the male nut. The radial clearance between the internal thread thread of the arc-shaped internal thread wedge and the bolt helical groove. Since the threads of the female and male nuts of the utility model are triangular threads for fastening, and their pitches and profiles are consistent with those of the protected nuts and bolts, the radial clearance is also eliminated. axial gap between them. At this time, the tighter the female nut is screwed, the tighter the arc-shaped internal thread wedge in the male nut and the helical groove of the bolt will be hooped, so that the utility model is like a firewall, blocking the standard nut from Loosening and receding during severe vibration to achieve the purpose of preventing loosening and receding.

When dismantling the standard nut shown in the utility model, first use an ordinary wrench to reversely pull the female nut, and the inner conical hole at the left end of the female nut will gradually disengage from the conical part of the outer conical boss of the male nut until it is unscrewed and disengaged. Bolt, at this time, under the action of metal elasticity, the multi-section arc-shaped internal thread wedges on the male nut are loosened in the bolt spiral groove and return to the original state. At this time, continue to turn the regular hexagonal outer circumference of the male nut in the opposite direction, and it can be easily taken out from the bolt, and when the standard nut is turned in the opposite direction with an ordinary wrench, the clamped parts on the bolt can be disassembled or repaired. the goal of. Because the utility model only increases the anti-loosening function to the standard nut, the main function of its fastening is still provided by the protected standard nut, so the utility model is called a threaded fastener companion.

Description of drawings

Figure 1 is a schematic diagram of the assembly of the threaded fastener partner of the present invention used on a standard bolt and nut.

Fig. 2 is a cross-sectional view of the structure diagram of the male nut in the threaded fastener partner of the utility model.

Fig. 3 is a cross-sectional view of the structure diagram of the female nut of the threaded fastener partner of the utility model.

detailed description

As shown in Figure 1, Figure 2, and Figure 3, ① is a standard bolt, ② is a standard nut, and ③ is a male nut of the present invention. The outer conical boss of the male nut in this embodiment is provided with four slit blind grooves , that is to form the male nut 3. The left ends are all fixedly connected to the four sections of arc-shaped internal thread wedges on the regular hexagonal body. This male nut ③ left end inner hole is provided with a section of aperture larger than the large diameter of the internal thread step hole, its purpose is to increase the elasticity of each arc-shaped internal thread wedge when compressing or loosening reset. ④ is a female nut, the inner tapered hole at the left end of which can be continuously tightened when the inner thread at the right end is pulled forward. 1) All clearances in the helical groove.

As shown in Figure 1, when the standard nut (2) is tightened on the bolt (1) according to the specification requirements, the male nut (3) is in the shape of a regular hexagon with one end facing inward and the end of the conical boss facing outward until it is screwed to the regular hexagon. The side face and the outer end face of the standard nut are flattened, and at this moment, the male nut is tightened on the helical groove of the bolt (1) with a common wrench to be tightly attached to the outer end face of the standard nut (2). Pick up the female nut (4) again, make the end with the conical hole face inward, and screw it on the helical groove of the bolt (1) until the inner conical hole of the female nut (4) and the conical surface of the outer conical boss of the male nut (3) At this time, use an ordinary wrench to tighten the female nut (4), which will continuously press the four arc-shaped internal thread wedges on the male nut (3) to be continuously tightened in the helical groove of the bolt (1). The fastener threads are all triangular threads, so while eliminating the radial clearance, the axial clearance between them is also eliminated. At this time, the male nut (3) and the female nut (4) are combined into one, like a wall, which hinders the retreat of the fastened standard nut (2) on the bolt (1), and achieves the purpose of preventing loosening and retreating. When dismantling the standard nut (2), first insert the regular hexagon on the outer edge of the female nut (4) with an ordinary wrench, and twist it in the opposite direction so that the inner conical hole at the left end can be easily aligned with the right end of the male nut (3). The outer conical boss is disengaged and separated until the female nut (4) is first unloaded from the standard bolt (1). At this time, the four sections of arc-shaped internal thread wedges formed by the outer conical boss of the male nut (3) are restored to their original shape under the action of elasticity. It can be easily removed from the bolt (1) by twisting it firmly in the opposite direction. At this time, the standard nut (2) can be easily removed with an ordinary wrench.

The function of the utility model is that after the mating of the female and male nuts, under the wedging action of several sections of arc-shaped internal thread wedges inside, it forms a firewall, preventing the protected standard nuts from loosening and retreating. The fastening function of the threaded fastener is mainly undertaken by the standard nut (2). The utility model is used together with the standard nut, and the anti-loosening effect is extraordinary, so it is called a threaded fastener companion.

With the high-frequency vibration of high-speed trains, automobiles and airplanes, the anti-loosening requirements for threaded fasteners are becoming more and more urgent. The appearance of the utility model threaded fastener companion will completely solve the problem of The troublesome problem of anti-loosening of threaded fasteners has made the new products invented by the Chinese famous at home and abroad.

Claims (4)

1. a kind of threaded fastener companion, is regular hexagon by periphery left end, and right-hand member is outer cone boss, and endoporus is standard triangle The positive nut of shape internal thread insertion is same specification regular hexagon with another outer rim, but its left end has one section of inner circle taper hole, right-hand member For the cloudy nut of standard triangle internal thread is constituted.

2. a kind of threaded fastener companion according to claim 1, it is characterized in that：The taper of positive nut right-hand member conical boss Taper with the inner circle taper hole of cloudy nut left end is corresponding, and both are in the extreme position for coordinating, positive nut outer cone boss Small end end diameter be greater than the diameter of cloudy nut inner circle taper hole small end, the diameter at the positive big end of nut cone boss should be greater than The diameter at the cloudy big end of nut left end inner circle taper hole；The whole endoporus of internal thread insertion of positive nut, but it has one section to be more than in left end The stepped hole in the big footpath of the internal thread.

3. a kind of threaded fastener companion according to claim 1, it is characterized in that：Positive nut conical boss is in small end end face Direction is uniformly arranged more than at least one, and the narrow slit along the extension of positive nut central axis direction since conical boss small end is blind Groove, terminates when the positive nut left end regular hexagon end face outside of distance also has a segment distance, and every narrow slit blind slot both passes through interior spiral shell It is divided at least more than one section of arc-shaped internal thread voussoir, each voussoir between pit up/down perforation, adjacent two narrow slit blind slots Left end is connected with regular hexagon body, the function with elastic reset.

4. a kind of threaded fastener companion according to claim 1, it is characterized in that：The total length of cloudy nut meets national mark The nut length that accurate common thin nut specifies, its periphery is regular hexagon over the entire length, and its left end has one section of female cone Hole, its taper is corresponding with the taper of positive nut outer cone boss, and it is convex that the conical bore outside diameter should be less than positive nut cone The diameter at the big end of platform, end diameter should be less than the diameter of positive nut conical boss small end, and the tooth number of its right-hand member internal thread is at least 1 It is more than tooth.