Double-slotting self-locking locknut

Abstract

A double-groove self-locking locknut belongs to the technical field of fasteners and is characterized in that two opposite lateral closing grooves are formed in the side wall, close to the end face of the side, of one side of an existing nut body, the lateral closing grooves are formed in the side wall of the nut body in the direction from the outer side wall to the inner side wall, and grooves are formed in the positions of internal threads; the nut comprises a nut body, a first lateral opening closing groove and a second lateral opening closing groove are formed in the nut body, the side faces of the lateral opening closing grooves are parallel to the end face of the nut body, the first lateral opening closing groove and the second lateral opening closing groove are staggered, and the lateral opening closing grooves are major arc grooves. The nut has the advantages that the structure is simple, only two opposite groove openings are formed from the outer side wall to the inner side wall, and production is very convenient; the operation is simple, and the locknut can be tightened just like tightening a common screw; and during operation, after the nut body is tightened, the first major arc groove and the second major arc groove are continuously tightened, so that the first major arc groove and the second major arc groove are slightly deformed, meshing is tighter, and loosening is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a double-grooved self-locking anti-loosening nut. Background Art

[0002] Nuts and screws are common fasteners in the machining industry. However, in a long-term vibration environment, ordinary nuts will loosen, resulting in a reduced fastening effect. Therefore, it is necessary to improve the nuts to enhance their seismic performance.

[0003] There are various anti-loosening nuts on the existing market, but they all have complex structures, which are not only inconvenient for production but also for operation and installation. For example, in the patent document CN2021107583862, it provides an anti-loosening nut, including: a nut body, a limiting pin shaft, and a spherical body; the nut body is formed with a threaded hole, and an axial through hole and a radial through hole are formed orthogonally. The axial through hole is used to install the limiting pin shaft, and the radial through hole communicates with the threaded hole for installing the spherical body; the diameter of the radial through hole is larger than the diameter of the spherical body, the diameter of the spherical body is larger than the maximum diameter of the limiting pin shaft and larger than the distance from the inner side of the radial through hole to the bottom of the thread groove in the threaded hole; the diameter of the axial through hole is the same as the maximum diameter of the limiting pin shaft; when the limiting pin shaft is pressed into the first position in the axial through hole, tightening between the screw and the nut body is achieved; when the limiting pin shaft is pressed into the second position in the axial through hole, the extrusion of the screw is released.

[0004] Although this kind of nut has an anti-loosening effect, its structure is very complex, not only with high production costs but also inconvenient for operation, and is not suitable for practical applications. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a nut with an anti-loosening effect, which has a simple structure with double grooves dug on the side wall, is convenient for production and operation, aiming at the above problems.

[0006] To solve the above technical problems, the technical solution adopted by the utility model is a double-grooved self-locking anti-loosening nut, including a nut body. On the side wall of the nut body near the end face of this side, there are two opposite lateral mating grooves, which are respectively called the first lateral mating groove and the second lateral mating groove. The lateral mating grooves are grooved on the side wall of the nut body from the outer side wall towards the inner side wall and form groove channels at the internal thread position. The side surface of the lateral mating groove is parallel to the end face of the nut body, that is, both the first lateral mating groove and the second lateral mating groove are perpendicular to the axis of the nut body; the width of the groove opening of the lateral mating groove is smaller than the width of the groove bottom; in this way, due to the width of the groove opening of the lateral mating groove being smaller than the width of the groove bottom, the internal thread near the end face position on the nut deflects, and when tightened on the screw, the internal thread of this part will more tightly fasten the external thread on the screw, thus making it very difficult for it to loosen.

[0007] Preferably, the slot openings of the lateral closing slots are closed.

[0008] The radian of the lateral closing slot on the side wall of the nut is not limited, and it can be a major arc or a minor arc.

[0009] The first lateral closing slot and the second lateral closing slot can be in the same plane or not in the same plane. When the first lateral closing slot and the second lateral closing slot are in the same plane, both the first lateral closing slot and the second lateral closing slot are minor arc slots.

[0010] Furthermore, the first lateral closing slot and the second lateral closing slot are misaligned, that is, the sides of the first lateral closing slot and the second lateral closing slot are not in the same plane position.

[0011] Furthermore, the lateral closing slot is a major arc slot, that is, the arc of the slot edge at the internal thread position is a major arc. The inner depth of the major arc slot is equal to 1.01 - 1.5 times the inner radius of the nut body, and the inner radius is the radius of the internal thread. The first lateral closing slot and the second lateral closing slot are renamed the first major arc slot and the second major arc slot, that is, both the first major arc slot and the second major arc slot are perpendicular to the axis line of the nut body and the first major arc slot and the second major arc slot intersect but do not contact each other.

[0012] Furthermore, the depth of the major arc slot is equal to 1.1 - 1.2 times the inner radius of the nut body, preferably 1.15 times.

[0013] The beneficial effects of the present utility model are

[0014] (1) The structure is simple. Only two opposite slot openings are opened from the outer wall to the inner wall, and the production is very convenient.

[0015] (2) The operation is simple. Just tighten this locknut like tightening an ordinary screw.

[0016] (3) The effect is very good. During operation, after tightening the nut body, the internal threads outside the first major arc slot and the second major arc slot will clamp the external threads on the screw more tightly, making the meshing closer, increasing the frictional force, and effectively preventing loosening. It can be applied to environments with severe vibration and impact. This self-locking nut is convenient and simple to install and disassemble and can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the double-slotted self-locking locknut of the present utility model.

[0018] Figure 2 It is a side structural schematic diagram of the double-slotted self-locking locknut in Embodiment 1.

[0019] Figure 3 Schematic side view of the double-grooved self-locking anti-loosening nut in Embodiment 2.

[0020] In the figure: 1. Nut body; 2. Lateral mating groove; 3. First lateral mating groove; 4. Second lateral mating groove; 5. Superior arc groove; 6. First superior arc groove; 7. Second superior arc groove. Specific implementation mode

[0021] The present utility model will be further described below in conjunction with embodiments. Embodiment

[0022] As Figure 2 shown, a double-grooved self-locking anti-loosening nut is made, that is, on the basis of the nut body 1 of the existing ordinary nut, two opposite lateral mating grooves 2 are dug on the side wall of the nut body 1 close to the end face of this side. These two lateral mating grooves 2 are respectively called the first lateral mating groove 3 and the second lateral mating groove 4. The lateral mating grooves 2 are grooved from the outer wall to the inner wall on the side wall of the nut body 1 and form a groove at the internal thread position, and the openings of the two lateral mating grooves 2 are closed, so that the width of the opening is smaller than the width of the groove bottom, so that the internal thread on the nut body 1 close to the end face position is deflected; the side surface of the lateral mating groove 2 closer to the nut body 1 is parallel to the end face of the nut body 1, that is, both the first lateral mating groove 3 and the second lateral mating groove 4 are perpendicular to the axis of the nut body 1; the first lateral mating groove 3 and the second lateral mating groove 4 are misaligned, that is, the side surfaces of the first lateral mating groove 3 and the second lateral mating groove 4 are not in the same plane position.

[0023] During use, the nut body 1 is tightened like an ordinary nut. As Figure 2 shown, due to the slight deformation of the first lateral mating groove 3 and the second lateral mating groove 4, the internal thread on the side of the first lateral mating groove 3 and the second lateral mating groove 4 close to the outer end face of the nut is more tightly engaged with the external thread on the screw, increasing the frictional force and effectively preventing loosening. Embodiment

[0024] As Figure 1 、 3 shown, on the basis of Embodiment 1, further, the lateral mating groove is made into a superior arc groove 5, that is, the arc of the groove body edge at the internal thread position is made into a superior arc, and the inner depth of the superior arc groove 5 is made equal to 1.01 - 1.5 times the inner radius of the nut body 1. The first lateral mating groove 3 and the second lateral mating groove 4 are renamed the first superior arc groove 6 and the second superior arc groove 7, that is, both the first superior arc groove 6 and the second superior arc groove 7 are perpendicular to the axis of the nut body 1 and the first superior arc groove 6 and the second superior arc groove 7 intersect but do not touch each other.

[0025] Further, the depth of the major arc groove 5 is equal to 1.1-1.2 times the inner radius of the nut body 1, preferably 1.15 times.

[0026] During use, the nut body 1 is tightened like an ordinary nut. As Figure 3 shown, due to the slight deformation of the first major arc groove 6 and the second major arc groove 7, the internal threads outside the first major arc groove 6 and the second major arc groove 7 are more tightly engaged with the external threads on the screw, increasing the frictional force and effectively preventing loosening; the major arc groove 5 in Embodiment 2 is easier to operate and tighten than the lateral closing groove 2 in Embodiment 1. This kind of nut can be applied to environments with severe vibration and impact force. This self-locking nut is convenient and simple to install and disassemble and can be reused.

Claims

1. A double-slotted self-locking anti-loosening nut, comprising a nut body (1), characterized in that Two opposite lateral joint grooves (2) are provided on a side wall of the nut body (1) near the side end surface. The two lateral joint grooves are respectively referred to as a first lateral joint groove (3) and a second lateral joint groove (4). The lateral joint groove (2) is grooved on the side wall of the nut body (1) from the outer wall to the inner wall and forms a groove at the position of the internal thread. The side surface of the lateral joint groove (2) is parallel to the end surface of the nut body (1). The groove width of the lateral joint groove (2) is smaller than the groove bottom width.

2. The double-slotted self-locking anti-loosening nut according to claim 1, characterized in that The slots of the lateral closing slots (2) are closed.

3. The double-slotted self-locking anti-loosening nut according to claim 2, characterized in that The first lateral joint groove (3) and the second lateral joint groove (4) are offset.

4. The double-slotted self-locking anti-loosening nut according to claim 3, characterized in that The lateral joint groove (2) is a major arc groove (5), and the inner side depth of the major arc groove (5) is equal to 1.01-1.5 times the inner radius of the nut body (1), that is, the first major arc groove (6) and the second major arc groove (7) are interlaced but not in contact with each other.

5. The double-slotted self-locking anti-loosening nut according to claim 4, characterized in that The depth of the major arc groove (5) is equal to 1.1-1.2 times the inner radius of the nut body (1).

6. The double-slotted self-locking anti-loosening nut according to claim 5, characterized in that The depth of the major arc groove (5) is equal to 1.15 times the inner radius of the nut body (1).

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