RU2459125C1 - Threaded joint - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: proposed joint has tightening threaded element with hole receiving locking element, nut, spring washer and body to be tightened. Nut seat has saw teeth with inclined top wall and vertical cut made along radius on site with larger-diameter equal to or slightly exceeding that of spring washer. Width of inclined top wall of saw teeth equals height of spring washer while tooth vertical cut equals Vt.=gs.=1.618 mm, where gs. is golden section from 1 mm. Spring washer features vertical or skewed cut made over its entire thickness while left and right ends of said washer have angles of sharpening directed in opposite sides relative to each other. Said angles equal incidence angle between tooth top wall and its vertical cut. Their heights are equal but smaller than that of spring washer by golden section from 1 mm. Circular way similar to that of saw teeth ob nut seat is made on body to be tightened. Top and bottom faces of spring washer left and right ends are parallel.

EFFECT: increased friction forces, higher reliability.

2 dwg

Description

The invention relates to the field of engineering of the widest range of applications and can be used to create new workable joints nut - spring washer - body part in all areas of the national economy.

The connection nut - spring washer - body part is widely known, for example, the connection nut - spring washer - body part is used in mechanical engineering very widely: from the most accessible to observation to the most closed - nuclear reactors, but experience in observing such connections shows that in most In cases, such a connection does not fulfill its functional purpose and the nuts still turn on their own despite the presence of a grower. This can be easily verified by looking at the nuts for fastening the rails to the sleepers, where the grovers dangle in all their glory as the train passes, and the nut is turned away so that it no longer plays any role. The reasons for the failure of the spring washers are that the technical nature of such a connection is violated - the height of the nut irregularities is much less than the thickness of the ends of the spring washer and as a result, the connection does not rattle and does not slow down the self-rotation of the nut.

Spring washers are performed according to GOST 6402-70 (see. "Machine parts". Atlas of structures, part 1, M., "Engineering", 1992, sheet 58). From the drawing of the spring washer it is clearly seen that the thickness of the washer is the same throughout the washer, and on sheet 71 of Fig. 1 the position “a” is even more clearly seen that the spring washer after tightening is aligned in its thickness and for what irregularities the nut will catch - it is not clear .

The disadvantage of all known threaded connections with spring washers is that they are not functional for the indicated reasons.

The proposed threaded connection is devoid of this drawback because the nut on its landing plane has sawtooth teeth with an inclined upper wall and a vertical cut made radially on the site with the largest diameter equal to the diameter of the spring washer, the width of the inclined upper wall of the sawtooth tooth is equal to the height of the spring washer, and the vertical cut of the tooth, Vz = Zs. = 1,681 mm, where Zs. - a golden section of 1 mm, and the spring washer has a vertical or inclined slice throughout the thickness, the left and right ends of this washer have sharpening angles directed in opposite directions with respect to each other, the angle is equal to the angle of meeting of the upper tooth wall with its a vertical slice, and in height they are equal to each other, but greater than the height of the spring washer for a golden section of 1 mm, while on the contractible body (body) at a diameter equal to the diameter of the spring washer, and at a width equal to the width of this washer, an annular ana ogichnaya path of the saw teeth, as well as on the seat nut, the upper and lower bounds of the left and right ends of the spring washer parallel to each other.

The technical result is an increase in the friction forces between the spring washer and nut, the spring washer and the housing and an increase in the working capacity of the threaded joint.

The objective of the invention is to increase the reliability of self-control of the nut by increasing the friction forces, and the ends of the spring washer will now necessarily fall when the nut is turned away into a vertical section of the nearest sawtooth tooth.

New signs:

- the nut on its landing surface has sawtooth teeth with an inclined upper wall and a vertical cut made along the radius on the site with the largest diameter equal to or slightly larger than the diameter of the spring washer,

- the width of the inclined upper wall of the sawtooth tooth is equal to the height of the spring washer, and the vertical section of the tooth Vz = Zs. = 1,681 mm, where Zs. - golden ratio from 1 mm,

- the spring washer has a vertical or inclined slice, the left and right ends of this washer have sharpening angles directed in opposite directions with respect to each other, and the angle is equal to the angle of meeting of the upper wall of the tooth with its vertical slice,

- in height, both ends of the spring washer are equal to each other, but less than the height of the spring washer by a golden ratio of 1 mm,

- on a contractible body (case) with a diameter equal to the diameter of the spring washer or slightly larger, an annular track is made, similar to the track of sawtooth teeth, as in the seat of the nut.

The above new essential features, together with the known ones, are necessary and sufficient to achieve a technical result in all cases to which the requested amount of legal protection applies.

The technical result is achieved by performing sawtooth teeth and the same teeth on the tightening body (housing) on the seat, where, when tightening the nut, the ends of the spring washer fall and reliably lock the nut from self-loosening.

Figure 1 is a General view of the threaded connection, figure 2 is a view B showing an annular track of sawtooth teeth on the seat of the nut.

Connection devices. A tightening threaded element 1 (bolt) with a hole for the fixing element, nut 2, spring washer 3, contractible body (housing) 4, and nut 2 has sawtooth teeth 5 with an inclined upper wall 6 and a vertical slice 7 made along the radius on the site with the largest diameter equal to or slightly larger than the diameter of the spring washer 3, the width of the inclined upper wall 6 of the sawtooth tooth 5 is equal to the height of the spring washer 3, and the vertical cut 7 of the tooth 5 is Vz = Zs. = 1.681 mm, where Zs. - the golden section is from 1 mm, while the spring washer 3 has a vertical or inclined slice throughout the thickness, the left 8 and right 9 ends of this washer have sharpening angles directed in opposite directions with respect to each other, equal in magnitude to the angle of the upper the walls 6 of the tooth 5 with its vertical cut 7, and in height they are equal to each other, but greater than the height of the spring washer 3 by a golden section of 1 mm, while on the contractible body (body) at a diameter equal to the diameter of the spring washer 3 or slightly larger him, the ring track is made, similar to the track of sawtooth teeth 5, as on the seat of the nut 2, and the upper and lower faces of the left 8 and right 9 ends of the spring washer 3 are parallel to each other. Conventionally, for a better understanding, the axis of the connection in figure 1 is shown by a thick line 10, and arrow A shows the tightening of the nut around the axis 10. The bolt 1 is shown by strokes because it is not the subject of the invention and has not undergone any changes.

The operation of the connection is that when tightening the nut 2 in the direction of arrow A, the teeth 5 slide along the spring washer 3 and click, indicating that the tightening is taking place. If it is possible to unscrew the nut 2, which is possible only by the size of the inclined wall 6, after which the left end 8 of the spring washer 3 pops into the next tooth and locks the further unscrewing of the nut 2.

Claims (1)

A threaded connection, including a tightening threaded element with an opening for a fixing element, a nut, a spring washer and a tightening body (housing), characterized in that the nut on its seating surface has sawtooth teeth with an inclined upper wall and a vertical cut made along the radius on the platform with the largest diameter equal to or slightly larger than the diameter of the spring washer, the width of the inclined upper wall of the sawtooth tooth is equal to the height of the spring washer, and the vertical section of the tooth is Bz = Zs = 1.618 mm, where Zs is the golden section from 1 mm, and the spring washer has a vertical or inclined slice throughout the thickness, and the left and right ends of this washer have sharpening angles directed in opposite directions with respect to each other, and the angle is equal to the angle between the upper tooth wall and its vertical cut, and in height they are equal to each other, but less than the height of the spring washer for the golden section from 1 mm, while on the contracted body (body) at a diameter equal to the diameter of the spring washer or slightly larger, an annular track is made, similar to the track from sawtooth teeth as on the seat of the nut, with the upper and lower faces of the left and right ends of the spring washer parallel to each other.

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