CN218294147U - No loose nut structure - Google Patents

Abstract

A nut non-loosening structure is composed of a positioning piece, a loosening nut, a clamping nut, and a double-diameter bolt. The characteristic is that the buckle of the upturned edge of the positioning part locks the clamp nut and the lock nut, and the reverse direction of the lock thread and the clamp thread makes there be no axial displacement between the clamp nut and the lock nut, or the clamping thread is used to lift The increased force generated by the angle greater than the lead angle of the loosening thread prevents the nut from loosening. Eliminate the nut manufacturing experience and craftsmanship called "Never Loosening Nut", and only use the usual manufacturing process. It reduces the technical difficulty of making nuts that do not loosen; reduces the cost of nuts; facilitates the wide application of non-loosening nuts; can reduce more failures and accidents caused by loosening nuts, and can further reduce the damage caused by loosening nuts. Equipment wear and tear.

Description

No loose nut structure

technical field

The utility model relates to a non-loose nut structure.

Background technique

Nuts known as "Never Loosening Nuts" currently have problems that are difficult for non-"Never Loosening Nuts" industry personnel to manufacture.

Contents of the invention

In order to solve the problem that non-"never loose nuts" industry personnel are difficult to manufacture nuts known as "never loose nuts". The invention provides a non-loose nut structure.

The invention is composed of a positioning piece, a lock nut, a clamping nut and double-diameter bolts. The positioning part is made of the outer edge of the flat pad as an upturned edge, and the side of the inner hole or the inner hole is made or made of a loose structure, and the positioning part is integrally formed; Loose structure, a hole with a diameter larger than the outer diameter of the clamping thread is formed on the force-applying surface side, and the hole and its internal thread are integrally formed on the same axis; the clamping nut is integrally formed by the force-receiving surface with or without a stop loose structure ; The double-diameter bolt is composed of a loosening thread, a clamping thread, a screw rod, and a bolt head. The anti-loosening thread is reverse or forward, the outer diameter of the thread is smaller than the root diameter of the clamping thread, and the thread rise angle is smaller than the clamping thread rise angle; the anti-loosening structure of the clamping nut and the anti-loosening nut is a positive N-gon or Tooth shape or special shape; the loosening structure of the positioning piece and the clamping nut, the locking structure of the locking nut is a concave-convex corresponding matching relationship or its shape is a concave-convex corresponding matching assembly relationship, the locking structure of the positioning piece is consistent with the clamping nut or The shape of the lock nut is concave-convex corresponding to the assembly relationship, and neither the clamp nut nor the lock nut has a lock nut structure. The clamping nut without the anti-loosening structure is screwed on the clamping thread of the double diameter bolt, and the upper fixing part of the anti-loosening structure of the anti-loosening nut is screwed onto the anti-loosening thread of the double diameter bolt to fasten with the clamping nut, and the upper part of the positioning part Press or tap the buckle on the side of the clamping nut with warping edge, and fix the clamping nut and the lock nut; the clamp nut is screwed on the clamping thread of the double-diameter bolt, and the positioning part is installed on the clamping nut's stop loosening structure On the top, the lock nut is screwed onto the lock thread of the double-diameter bolt and tightened with the clamp nut. The upturned edge of the positioning piece is pressed or tapped on the side of the lock nut to fix the clamp nut and the lock nut. ; The clamping nut and the locking nut without the anti-loosening structure are respectively screwed on the clamping thread and the anti-loosening thread of the double-diameter bolt, and the positioning part is fastened between the clamping nut and the anti-loosening nut. The anti-loosening structure cooperates with the concave-convex shape of the clamp nut or the anti-loosening nut, and the upturned edge of the locating piece is pressed or tapped on the side of the anti-loosening nut or the anti-loosening nut, so that the clamping nut and the anti-loosening nut are positioned and fixed.

The nut does not loosen during the vibration shock. The clamping nut and the lock nut of the structural fastening system rotate in the same direction and with the same amplitude. When the rotation is the tightening direction of the clamping nut, and the locking thread and the clamping thread are in the opposite direction, the axial displacement between the clamping nut and the locking nut is the axial displacement of the clamping nut + the axial displacement of the locking nut, and the clamping nut The axial displacement with the lock nut is the respective axial displacement; when the rotation is the tightening direction of the clamp nut and the lock thread and the clamp thread are in the same direction, the axial displacement between the clamp nut and the lock nut is the clamp Clamp nut axial displacement - lock nut axial displacement, the axial displacement of clamp nut and lock nut is the respective axial displacement. When the rotation is in the direction of loosening the clamping nut and the anti-loosening thread and the clamping thread are reversed, the axial displacement between the clamping nut and the locking nut is (-clamping nut axial displacement)+(-stopping nut shaft displacement) = 0, the axial displacement of the clamping nut and the lock nut = 0; The axial displacement is the axial displacement of the lock nut - the axial displacement of the clamp nut = 0, and the axial displacement of the clamp nut and the lock nut → 0. The tightening range of the clamping nut of the fastening system with the nut not loosening in the vibration shock is limited, and the axial displacement between the clamping nut and the lock nut is a limited micro amount. Therefore, the axial dimension of the anti-loosening structure needs to be superimposed on the axial displacement dimension between the clamping nut and the anti-loosening nut. The hole on the side of the force-applying surface of the lock nut is set to eliminate the accumulation of tolerances of each component and ensure that the positioning piece is tightened.

The characteristics of the present invention: the buckle of the upturned edge of the locating member makes the clamping nut and the lock nut positioned and fixed, and the reverse direction of the lock nut and the clamping thread makes there be no axial displacement between the clamp nut and the lock nut. Clamping thread lead angle > loosening thread lead angle produces increased force to prevent the nut from loosening. The manufacturing experience and craftsmanship of the nut called "Never Loosening Nut" is omitted, and only the usual process is used to manufacture it.

Beneficial effects of the present invention: reduce the technical difficulty of making nuts that do not loosen; reduce the cost of nuts; facilitate the wide application of nuts that do not loosen; Equipment wear due to loose nuts.

Description of drawings

Figure 1-6 is a structural schematic diagram of three typical structures of the positioning member, in which Figure 2 is Figure 1, Figure 4 is the top view of Figure 3, and Figure 6 is the top view of Figure 5; Figure 7-10 is two typical structures of non-loose nuts Structural schematic diagram, wherein Fig. 8 is a top view of Fig. 7 and Fig. 10 is Fig. 9 .

In the figure 1-positioning piece, 1.1-upturned edge, 2-double diameter bolt, 2.1-loosening thread, 2.2-clamping thread, 3-loosening nut, 3.1-hole, 4-clamping nut, 5-stop Loose structure, 5.1-regular N-shaped hole, 5.2-regular hexagonal ring boss, 5.3-toothed hole.

detailed description

Shown in Figures 1 and 2, the locating member 1 is a flat pad shape, the outer side is an upturned edge 1.1, and the inner hole is made into a regular N-shaped hole 5.1.

Shown in Figures 3 and 4, the positioning element 1 is a flat pad shape, the outer side is an upturned edge 1.1, and the inner hole is made as a toothed hole 5.3.

As shown in Figures 5 and 6, the positioning member 1 is in the shape of a flat pad, with an upturned edge 1.1 on the outside, and a regular hexagonal annular boss 5.2 on the outside of the inner hole.

As shown in Figures 7 and 8, the clamping nut 4 without the anti-loosening structure 5 is screwed on the clamping thread 2.2 of the double-diameter bolt 2, and the positioning part 1 is installed on the anti-loosening structure 5 of the anti-loosening nut 3, and screwed to the double-diameter bolt 2. The locking thread 2.1 of the bolt 2 is fastened with the clamping nut 4, the end of the clamping thread 2.2 of the double-diameter bolt 2 is in the hole 3.1 of the locking nut 3, and the upturned edge 1.1 of the positioning part 1 is buckled in the clamping Tighten the side of the nut 4, and fix the clamp nut 4 and the lock nut 3 in position.

As shown in Figures 9 and 10, the clamping nut 4 and the locking nut 3 without the anti-loosening structure 5 are respectively screwed on the clamping thread 2.2 and the anti-loosening thread 2.1 of the double-diameter bolt 2, and the positioning part 1 is fastened on the Between the clamping nut 4 and the lock nut 3, the end of the clamping thread 2.2 of the double-diameter bolt 2 is in the hole 3.1 of the lock nut 3, and the positive hexagonal ring boss 5.2 of the positioning part 1 and the lock nut 3 Concave-convex shape fits together, and the upturned edge 1.1 of the locating member 1 is buckled on the side of the clamping nut 4 to position and fix the clamping nut 4 and the lock nut 3 .

Claims (1)

1. A nut non-loosening structure, which is characterized in that it is composed of a positioning piece (1), a lock nut (3), a clamping nut (4), and a double-diameter bolt (2); the positioning piece (1) is composed of a flat washer The outer edge is made as an upturned edge (1.1), and the inner hole side or the inner hole is made or made with a loosening structure (5), and the positioning piece (1) is integrally formed; With or without anti-loosening structure (5), a hole (3.1) with a diameter larger than the outer diameter of the clamping thread is formed on the side of the force application surface, and the hole (3.1) is integrally formed on the same axis as the internal thread; the clamping nut ( 4) It is composed of a force-bearing surface with or without an anti-loosening structure (5); the double-diameter bolt (2) is composed of an anti-loosening thread (2.1), a clamping thread (2.2), a screw rod, and a bolt head; The anti-loosening thread (2.1) is reverse or forward, and its thread outer diameter is smaller than the root diameter of the clamping thread (2.2), and its thread rise angle is smaller than the rise angle of the clamping thread (2.2); the clamping nut (4), stop The loosening structure (5) of the loose nut (3) is regular N-gon or tooth-shaped or irregular; The anti-loosening structure (5) is a concave-convex corresponding fitting relationship or its shape is a concave-convex corresponding fitting relationship. The anti-loosening structure (5) of the positioning part (1) and the shape of the clamping nut (4) or the anti-loosening nut (3) When the matching relationship is concave and convex, the clamping nut (4) and the lock nut (3) are not made with a loosening structure (5); the clamping nut (4) without the locking structure (5) is screwed on the double-diameter bolt On the clamping thread (2.2) of (2), the anti-loosening structure (5) of the lock nut (3) is mounted on the locator (1) and screwed onto the lock thread (2.1) of the double-diameter bolt (2) and clamped The nut (4) is tightened, and the upturned edge (1.1) of the positioning piece (1) is pressed or tapped on the side of the clamping nut (4), and the clamping nut (4) and the lock nut (3) are positioned and fixed ; The clamping nut (4) is screwed on the clamping thread (2.2) of the double-diameter bolt (2), the positioning piece (1) is installed on the loosening structure (5) of the clamping nut (4), and the loosening nut ( 3) Screw on the anti-loosening thread (2.1) of the double-diameter bolt (2) and tighten it with the clamping nut (4). 3), position and fix the clamp nut (4) and the lock nut (3); the clamp nut (4) and the lock nut (3) without the lock structure (5) are respectively screwed on the double-diameter On the clamping thread (2.2) and the locking thread (2.1) of the bolt (2), the positioning piece (1) is fastened between the clamping nut (4) and the locking nut (3), and the positioning piece (1) The anti-loosening structure (5) of the clamping nut (4) or the shape of the anti-loosening nut (3) is concave-convex, and the upturned edge (1.1) of the positioning part (1) is pressed or tapped to fold on the anti-loosening nut (3) Or clamp the side of the clamp nut (4), and fix the clamp nut (4) and the lock nut (3) in position.

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