Track double-slotting self-locking locknut

Abstract

A track double-slotting self-locking locknut belongs to the technical field of fasteners and comprises a nut body and a spring clamp, a flange plate is arranged on the end face of one side of the nut body, and arc-shaped groove-bottom-shaped straight rod grooves are formed in the end faces, located on the two sides of a threaded hole, of the outer side end face of the flange plate respectively. Two opposite lateral closing grooves are formed in the end face of the other side of the nut body and close to the side wall of the end face of the side, the spring clamp is a butterfly-shaped spring clamp formed by bending a spring wire diameter, and the diameter of an arc-shaped groove of the straight rod groove is equal to the diameter of the spring wire diameter. The nut has the advantages that the nut body is combined with the butterfly-shaped spring clamp, the straight rod groove and the double open grooves are formed in the nut body, the spring clamp can clamp a screw on a rail, the straight rod groove clamps the spring clamp, the double open grooves wrap the screw tightly, and therefore the nut locks the screw in a double mode, and the purpose of preventing looseness can be effectively achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a track double-slotted 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 reduced fastening effect. Therefore, it is necessary to improve the nuts to improve their anti-seismic performance. Especially on railway tracks, due to the particularity of railways, it is necessary to ensure that the nuts are not easy to loosen. Once the nuts are loose or even fall off, it will bring great safety hazards.

[0003] There are various kinds of anti-loosening nuts on the existing market, but they all have complex structures, which are not only inconvenient to produce, but also inconvenient to operate and install. For example, the patent document CN1 13897817A discloses a railway track anti-falling nut, including a nut body, a side pressure plate, a nylon pressure plate, a side groove, a side threaded hole, and a locking bolt. A main threaded hole is provided on the axis of the nut body, and a plurality of side grooves are provided on the side wall of the main threaded hole. The side groove is a vertically arranged strip groove, and a side pressure plate is provided in the side groove. A nylon pressure plate is fixed on the side of the side pressure plate close to the axis of the nut body, and a plurality of side threaded holes are provided on the end of the side groove away from the axis of the nut body. The side threaded hole is opened on the side wall of the nut body, and a locking bolt is screwed on the side threaded hole. The locking bolt passes through the side threaded hole and abuts against the side pressure plate; by matching the side pressure plate, the nylon pressure plate, and the locking bolt, the nut body can be locked by the locking bolt after being tightened, and the nut is not easy to loosen.

[0004] Although this nut has an anti-loosening effect, its structure is very complicated, not only the production cost is high, but also it is inconvenient to operate.

[0005] Not suitable for actual promotion and application. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a fastening assembly with a double-slotted nut clamped on a spring clamp in view of the above defects, so as to be applied to a track and prevent the nut from loosening and falling off.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is a rail double-slotted self-locking anti-loosening nut, including a nut body and a spring clip, a flange is provided on one end face of the nut body, and an arc-shaped groove bottom-shaped straight rod groove is provided on the end face positions on both sides of the threaded hole on the outer end face of the flange, and the two straight rod grooves are parallel; two opposite lateral joint grooves are provided on the other end face of the nut body and on the side wall close to the side end face position, and the two lateral joint grooves are respectively referred to as first lateral joint grooves and second lateral joint grooves. The lateral groove is grooved on the side wall of the nut body 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 groove is parallel to the end surface of the nut body, that is, the first lateral groove and the second lateral groove are perpendicular to the axis of the nut body. The groove width of the lateral groove is smaller than the groove bottom width, and the groove of the lateral groove is preferably closed. The spring clip is a zigzag strip spring clip formed by bending the spring wire diameter, which is used to clamp on the screw and clamp the track wing.

[0008] The spring clip includes a butterfly-shaped spring clip, a single-wing spring clip, a petal-shaped spring clip or a spring clip of other shapes.

[0009] For example, a butterfly-shaped spring clip is formed by bending a spring wire diameter made of elastic steel wire, wherein the middle part is bent into an n-shaped structure, and the two sides of the n-shaped structure are bent outwardly into c-shaped structures facing the n-shaped structure, together forming a butterfly-shaped spring clip; the arc groove diameter of the straight rod groove is equal to the diameter of the spring wire diameter, so that the two straight rod grooves on the flange can fit tightly and clamp the spring clip; when in use, the spring clip clamps the screw on the track, the nut body is screwed into the screw and the straight rod groove clamps the spring clip, and then the first lateral joint groove and the second lateral joint groove are further tightened to slightly deform the first lateral joint groove and the second lateral joint groove, thereby making the meshing tighter and increasing the friction, which can effectively prevent looseness.

[0010] Furthermore, the first lateral joint groove and the second lateral joint groove are misaligned, that is, the side surface of the first lateral joint groove and the side surface of the second lateral joint groove are not located on the same plane.

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

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

[0013] Furthermore, the arc-shaped groove bottom of the straight rod groove is a semicircular groove bottom.

[0014] The beneficial effect of the utility model is that the nut body is combined with the butterfly-shaped spring clip, and a straight rod groove and a double slot are arranged on the nut body, so that the spring clip can clamp the screw on the track, and the straight rod groove can clamp the spring clip, and at the same time the double slot can wrap the screw tightly, so that the nut can double-lock the screw, which can effectively achieve the purpose of preventing looseness. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the overall structure of the double-slotted self-locking anti-loosening nut for rails.

[0016] Figure 2 It is a schematic diagram of the upper side oblique view of the nut body in the utility model.

[0017] Figure 3 It is a schematic diagram of the oblique structure of the nut body in the utility model from the lower side.

[0018] Figure 4 It is a structural schematic diagram of the spring clip in the utility model.

[0019] Figure 5 This is a physical diagram of the present utility model.

[0020] In the figure: 1. nut body, 2. spring clip, 3. flange, 4. straight rod groove, 5. lateral joint groove, 6. first lateral joint groove, 7. second lateral joint groove, 8. internal thread, 9. n-shaped structure, 10. c-shaped structure, 11. superior arc groove, 12.

[0021] The first major arc trough, 13. The second major arc trough. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the embodiments.

[0023] like Figure 1 As shown, a track double-slotted self-locking anti-loosening nut is manufactured, that is, a spring clip 2 is provided on the nut body 1,

[0024] A flange 3 is directly generated on one end face of the nut body 1, and an arc-shaped straight rod groove 4 is provided on the outer end face of the flange 3 at the end face positions on both sides of the threaded hole, and the two straight rod grooves 4 are parallel; two opposite lateral joint grooves 5 are provided on the other end face of the nut body 1 and the side wall close to the side end face position, and the two lateral joint grooves 5 are respectively called the first lateral joint groove 6 and the second lateral joint groove 7, and the lateral joint groove 5 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 8, and the side surface of the lateral joint groove 5 is parallel to the end face of the nut body 1, that is, the first lateral joint groove 6 and the second lateral joint groove 7 are perpendicular to the axis of the nut body 1, and the lateral joint groove 5 The slot width is smaller than the slot bottom width, and the slot of the lateral joint slot 5 is preferably closed, so that the internal thread on the nut close to the end face is deflected and slightly deformed. When tightened on the screw, the internal thread of this part will tighten the external thread on the screw, making it difficult to loosen the fastening; the spring clip 2 is a butterfly-shaped spring clip bent from the spring wire diameter, wherein the middle part is bent into an n-shaped structure 9, and the two sides of the n-shaped structure 9 are bent outward to form a c-shaped structure 10 facing the n-shaped structure 9, and the feet of the middle n-shaped structure 9 are connected to a C-shaped structure 10 outward to form a butterfly-shaped spring clip 2 together; the arc slot diameter of the straight rod slot 4 is equal to the diameter of the spring wire diameter, so that the two straight rod slots 4 on the flange 3 can be stably fitted and clamped to the n-shaped structure 9 of the spring clip 2.

[0025] When in use, the spring clip 2 clamps the screw on the track, the nut body 1 is screwed into the screw and the straight rod groove 4 clamps the spring clip 2, and then the first lateral joint groove 6 and the second lateral joint groove 7 are further tightened. Since the first lateral joint groove 6 and the second lateral joint groove 7 are slightly deformed, the meshing is tighter and the friction force is increased.

[0026] The double locking force combined with the spring clip effectively prevents loosening.

[0027] Furthermore, the first lateral joint groove 6 and the second lateral joint groove 7 are staggered, that is, the first lateral joint groove 6

[0028] The side surface of the second lateral joint groove 7 is not located on the same plane.

[0029] Example 2.

[0030] like Figure 1 , 3As shown in , 4, on the basis of Example 1, further, the lateral joint groove 5 is made into a major arc groove 11, that is, the arc line of the groove edge located at the position of the internal thread 8 is the major arc, the inner side depth of the major arc groove 11 is equal to 1.01-1.5 times the inner radius of the nut body 1, the inner radius is the inner thread radius, the first lateral joint groove 6 and the second lateral joint groove 7 are renamed as the first major arc groove 12 and the second major arc groove 13, that is, the first major arc groove 12 and the second major arc groove 13 are both perpendicular to the axial center line of the nut body 1 and the first major arc groove 12 and the second major arc groove 13 are offset from each other but not in contact.

[0031] Furthermore, the depth of the superior arc groove 11 is equal to 1.1-1.2 times the inner radius of the nut body 1, preferably

[0032] 1.15 times; the arc-shaped groove bottom of the straight rod groove 4 is a semicircular groove bottom.

[0033] When in use, the spring clip 2 clamps the screw on the track, the nut body 1 is screwed into the screw and the straight rod groove 4 clamps the spring clip 2, and then the first major arc groove 12 and the second major arc groove 13 are further tightened. Since the first major arc groove 12 and the second major arc groove 13 are slightly deformed, the internal threads outside the first major arc groove 12 and the second major arc groove 13 are more closely engaged with the external threads on the screw, thereby increasing the friction force and effectively preventing loosening. In this way, the nut body 1 is combined with the butterfly-shaped spring clip 2, and the straight rod groove 4 and the double-open lateral joint groove 5 are provided on the nut body 1, so that the spring clip 2 can clamp the screw on the track, and the straight rod groove 4 can clamp the spring clip 2, and at the same time, the double-open grooves can wrap the screw tightly, so that the nut can double-lock the screw, which can effectively achieve the purpose of preventing loosening.

Claims

1. A double-slotted self-locking anti-loosening nut for a track, comprising a nut body (1) and a spring clip (2), characterized in that A flange (3) is provided on one end face of the nut body (1), and an arc-shaped straight rod groove (4) is provided on the outer end face of the flange (3) at the end face positions on both sides of the threaded hole, and the two straight rod grooves (4) are parallel; two opposite lateral joint grooves (5) are provided on the other end face of the nut body (1) and the side wall close to the end face position, and the two lateral joint grooves (5) are respectively called the first lateral joint groove (6) and the second lateral joint groove (7); the lateral joint groove (5) 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 (8); the side surface of the lateral joint groove (5) is parallel to the end face of the nut body (1), and the groove of the lateral joint groove is closed; the spring clip (2) is a zigzag strip spring clip formed by bending the spring wire diameter.

2. The double-slotted self-locking anti-loosening nut for rail according to claim 1, characterized in that The spring clip (2) comprises a butterfly-shaped spring clip, a single-wing-shaped spring clip, and a petal-shaped spring clip.

3. The double-slotted self-locking anti-loosening nut for rail according to claim 2, characterized in that The structure of the butterfly-shaped spring clip is as follows: the middle part is bent into an n-shaped structure (9), and both sides of the n-shaped structure (9) are bent outwards to form c-shaped structures (10) facing the n-shaped structure (9), which together form the butterfly-shaped spring clip (2); the arc-shaped groove diameter of the straight rod groove (4) is equal to the diameter of the spring wire diameter.

4. The double-slotted self-locking anti-loosening nut for rail according to claim 3, characterized in that The first lateral joint groove (6) and the second lateral joint groove (7) are offset.

5. The double-slotted self-locking anti-loosening nut for rail according to claim 4, characterized in that The lateral joint groove (5) is a major arc groove (11), that is, the arc line of the groove edge located at the position of the internal thread is a major arc, the inner side depth of the major arc groove (11) is equal to 1.01-1.5 times the inner radius of the nut body (1), the first major arc groove (12) and the second major arc groove (13) are both perpendicular to the axis of the nut body (1), and the first major arc groove (12) and the second major arc groove (13) are offset from each other but do not contact each other.

6. The double-slotted self-locking anti-loosening nut for rail according to claim 5, characterized in that The depth of the superior arc groove (11) is equal to 1.1-1.2 times the inner radius of the nut body (1).

7. The double-slotted self-locking anti-loosening nut for rail according to claim 6, characterized in that The depth of the superior arc groove (11) is equal to 1.15 times the inner radius of the nut body (1).

8. The double-slotted self-locking anti-loosening nut for rail according to claim 7, characterized in that The arc-shaped groove bottom of the straight rod groove (4) is a semicircular groove bottom.

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