Double-end stud structure with toothed convex cone at end part

Abstract

The utility model discloses a double-end stud structure with teeth on the convex cone at the end part, which comprises a double-end stud and a nut in threaded connection with the double-end stud, the convex cone is arranged at one end of the double-end stud extending into a connected piece, the connected piece is provided with a screw hole matched with the double-end stud, and the double-end stud is connected with the nut through the screw hole. A concave cone matched with the convex cone is arranged below the screw hole, the taper of the concave cone is smaller than that of the convex cone, clamping teeth are arranged on the convex cone and extend in the length direction of the double-end stud, and the diameter of the convex cone is smaller than the small diameter of an external thread of the double-end stud. Compared with the prior art, when the double-end stud is screwed in, the clamping teeth of the convex cone are extruded and deformed to enable the double-end stud to be tightly connected with a connected piece, and when the double-end stud tends to rotate relative to the connected piece under an external vibration load, the clamping teeth on the convex cone can increase resistance to prevent loosening. And the stable anti-loosening effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of fastener manufacturing technology, and in particular to a double-ended stud structure with a toothed, tapered end. Background Technology

[0002] Currently, the lower thread of the double-ended stud is screwed into the threaded hole of the lower connected component, and the middle part passes through the through hole of the upper connected component. The upper thread of the double-ended stud is screwed with a nut with a toothed washer or a Lock double nut. Although these two types of nuts have a certain anti-loosening effect, the lower thread connection screwed into the threaded hole of the lower connected component does not prevent loosening. Under the action of vibration load, the existing double-ended stud connection still loosens, causing equipment failure or even damage. Summary of the Invention

[0003] This invention provides a double-ended stud structure with a toothed, tapered end, to solve the problem of poor anti-loosening effect of the lower end thread of existing double-ended studs.

[0004] This utility model provides a double-ended stud structure with a toothed, tapered end, including a double-ended stud and a nut threadedly connected to the double-ended stud. One end of the double-ended stud extending into the connected component has a tapered end. The connected component has a threaded hole that mates with the double-ended stud. Below the threaded hole is a concave cone that mates with the tapered end. The taper of the concave cone is smaller than the taper of the tapered end. The tapered end has retaining teeth that extend along the length of the double-ended stud. The diameter of the tapered end is smaller than the minor diameter of the external thread of the double-ended stud.

[0005] Preferably, the teeth are obliquely distributed on the convex cone.

[0006] Preferably, the two sides of the locking tooth are a first tooth surface and a second tooth surface, respectively. The angle between the first tooth surface and the conical surface of the convex cone is smaller than the angle between the second tooth surface and the conical surface of the convex cone. The second tooth surface and the first tooth surface are distributed along the screwing direction.

[0007] Preferably, the end of the double-ended stud away from the convex cone is provided with an internal hexagonal recess.

[0008] Preferably, the thread of the double-ended stud is a right-hand thread.

[0009] Preferably, the nut is provided with a toothed washer.

[0010] Compared with the prior art, in this utility model, when the double-ended stud is screwed in, the retaining teeth of the convex cone are squeezed and deformed, so that the double-ended stud and the connected part are tightly connected together. When the double-ended stud is subjected to external vibration load and has a tendency to rotate relative to the connected part, the retaining teeth on the convex cone can increase the resistance to prevent loosening, thereby achieving a stable and anti-loosening effect. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the nut of this utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the double-ended stud of this utility model;

[0015] Figure 4 for Figure 1 An enlarged schematic diagram of the structure at point A in the middle.

[0016] Figure label:

[0017] 1. Double-ended stud, 11. Internal hexagonal recess, 2. Nut, 3. Convex cone, 31. Snap tooth, 311. First tooth surface, 312. Second tooth surface, 4. Washer, 5. Connected part. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] See attached document Figure 1This embodiment provides a double-ended stud structure with a toothed, tapered end, including a double-ended stud 1 and a nut 2 threadedly connected to the double-ended stud 1. One end of the double-ended stud 1, extending into the connected component 5, has a tapered end 3. The connected component 5 has a threaded hole that mates with the double-ended stud 1. Below the threaded hole is a concave cone that mates with the tapered end 3. The taper of the concave cone is smaller than the taper of the tapered end 3 to ensure compression contact. The tapered end 3 has retaining teeth 31 extending along the length of the double-ended stud 1. The diameter of the tapered end 3 is smaller than the minor diameter of the external thread of the double-ended stud 1. In this invention, the double-ended stud 1 is first screwed into the lower connected component 5, so that the convex cone 3 at the bottom of the double-ended stud 1 engages with the concave cone of the lower connected component 5. Then, the upper connected component 5 is passed through the double-ended stud 1, and the nut 2 is screwed in from the top of the double-ended stud 1 and tightened. During tightening, the retaining teeth 31 on the convex cone 3 of the double-ended stud 1 are deformed by the concave cone, which tightly binds the double-ended stud 1 to the lower connected component 5, achieving an anti-loosening effect. When subjected to external vibration loads, if the double-ended stud 1 tends to loosen, the double-ended stud 1 tends to rotate relative to the lower connected component 5. At this time, the retaining teeth 31 on the double-ended stud 1 can increase resistance to prevent loosening, achieving a stable anti-loosening effect.

[0020] As another embodiment of this utility model: refer to the appendix Figure 3 The teeth 31 are obliquely distributed on the cone 3.

[0021] As another embodiment of this utility model: refer to the appendix Figure 4 The two sides of the locking tooth 31 are a first tooth surface 311 and a second tooth surface 312, respectively. The angle between the first tooth surface 311 and the conical surface of the cone 3 is smaller than the angle between the second tooth surface 312 and the conical surface of the cone 3. That is, the slope of the first tooth surface 311 is relatively gentle, while the slope of the second tooth surface 312 is relatively steep. The second tooth surface 312 and the first tooth surface 311 are distributed along the screwing direction. When the double-ended stud 1 is tightened clockwise, clockwise is the screwing direction, and the gentle first tooth surface 311 can smoothly rotate along the concave cone of the lower connected part 5. When the double-ended stud 1 has a tendency to loosen counterclockwise, the steep second tooth surface 312 on the other side can increase the resistance to prevent the double-ended stud 1 from loosening.

[0022] As another embodiment of this utility model: the end of the double-ended stud 1 away from the convex cone 3 is provided with an internal hexagonal recess 11, which facilitates the turning of the double-ended stud 1.

[0023] As another embodiment of this utility model: the thread of the double-ended stud 1 is a right-hand thread.

[0024] As another embodiment of this utility model: refer to the appendix Figure 2The nut 2 is provided with a toothed washer 4. When subjected to external vibration load, the nut 2 tends to rotate counterclockwise relative to the stud 1. The teeth on the washer 4 can increase the resistance to prevent loosening and achieve the effect of stabilizing and preventing loosening.

[0025] As another embodiment of this utility model: the convex cone 3 at the lower part of the double-ended stud 1 is subjected to quenching treatment to improve the surface hardness, so that the steep teeth of the convex cone 3 on the double-ended stud 1 leave a deeper indentation on the concave cone surface of the connected part 5 below, and the anti-loosening effect is better.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A double-ended stud structure with a toothed, tapered end, characterized in that, The device includes a stud and a nut threadedly connected to the stud. One end of the stud, which extends into the connected component, has a convex cone. The connected component has a threaded hole that mates with the stud. Below the threaded hole, there is a concave cone that mates with the convex cone. The taper of the concave cone is smaller than that of the convex cone. The convex cone has retaining teeth that extend along the length of the stud. The diameter of the convex cone is smaller than the minor diameter of the external thread of the stud.

2. The double-ended stud structure with toothed, tapered ends according to claim 1, characterized in that, The teeth are obliquely distributed on the convex cone.

3. The double-ended stud structure with toothed end tapers according to claim 2, characterized in that, The two sides of the locking tooth are a first tooth surface and a second tooth surface, respectively. The angle between the first tooth surface and the conical surface of the convex cone is smaller than the angle between the second tooth surface and the conical surface of the convex cone. The second tooth surface and the first tooth surface are distributed along the screwing direction.

4. The double-ended stud structure with toothed, tapered ends according to claim 3, characterized in that, The end of the double-ended stud away from the convex cone is provided with an internal hexagonal recess.

5. The double-ended stud structure with toothed end tapers according to claim 4, characterized in that, The thread of the double-ended stud is a right-hand thread.

6. The double-ended stud structure with toothed end tapers according to claim 5, characterized in that, The nut is provided with a toothed washer.

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