Tapered toothed thread anti-loose connecting structure

Abstract

The utility model discloses a conical toothed thread anti-loose connecting structure which comprises a nut and a screw, a first convex cone is arranged on the nut, an internal thread of the nut extends into the first convex cone, a first connected piece between the nut and the screw is provided with a first concave cone, and the first convex cone is matched with the first concave cone. The taper of the first concave cone is larger than that of the first convex cone, and conical teeth are arranged on the outer side of the first convex cone. Compared with the prior art, the first convex cone of the nut is tightly abutted against the first concave cone of the first connected piece, the first convex cone is driven to tightly hold the screw rod, and when the loosening tendency occurs, the first connected piece has the upward moving tendency to apply force to the nut, so that the nut is prevented from being loosened. And the force enables the threads at the first convex cone of the nut to generate inward radial pressure along the first concave cone, so that the screw rod is tightly held, the nut is prevented from loosening, and the anti-loosening requirement is met. And secondly, the conical teeth on the first convex cone can increase the friction force between the first convex cone and the first connected piece, and the anti-loosening effect is further improved.

Description

Technical Field

[0001] This utility model relates to the field of fastener manufacturing technology, and in particular to a tapered toothed threaded anti-loosening connection structure. Background Technology

[0002] Currently, bolted structures are prone to loosening due to continuous equipment vibration, leading to equipment failure and accidents. Existing spring washers in bolted connections rely on the elastic deformation of the bolt after tightening to generate continuous pressure between the threaded parts or connected components, thereby increasing friction to prevent loosening. However, the anti-loosening effect of such washers is very limited. Utility Model Content

[0003] This utility model provides a tapered toothed threaded anti-loosening connection structure to solve the problem of the ineffective anti-loosening effect of existing bolt structures.

[0004] This utility model provides a tapered toothed threaded anti-loosening connection structure, including a nut and a screw. The nut is provided with a first convex cone, and the internal thread of the nut extends into the first convex cone. The first connected part between the nut and the screw is provided with a first concave cone. The first convex cone and the first concave cone cooperate with each other, and the taper of the first concave cone is greater than the taper of the first convex cone. The outer side of the first convex cone is provided with tapered teeth.

[0005] Preferably, a first conical spring washer is provided between the first concave cone and the first convex cone. The outer side of the first conical spring washer is provided with a first conical surface that mates with the first concave cone, and the inner side of the first conical spring washer is provided with a second conical surface that mates with the first convex cone. The taper of the second conical surface is greater than the taper of the first convex cone.

[0006] Preferably, the first conical surface is provided with conical teeth.

[0007] Preferably, the first conical spring washer and the nut are coaxially arranged.

[0008] Preferably, the screw is provided with a second convex cone, and the second connected member between the nut and the screw is provided with a second concave cone that mates with the second convex cone, and the outer side of the second convex cone is provided with conical teeth.

[0009] Preferably, a second conical spring washer is provided between the second concave cone and the second convex cone, the outer side of the second conical spring washer is provided with a third conical surface that mates with the second concave cone, and the inner side of the second conical spring washer is provided with a fourth conical surface that mates with the second convex cone.

[0010] Preferably, the third conical surface is provided with conical teeth.

[0011] Preferably, the second conical spring washer and the second convex cone are coaxially arranged.

[0012] Compared with the prior art, in this invention, the first convex cone of the nut is pressed against the first concave cone of the first connected member, causing the first convex cone to tightly grip the screw. When a loosening tendency occurs, the first connected member tends to move upward, applying force to the nut. This force, along the first concave cone, generates inward radial pressure on the thread at the first convex cone of the nut, further tightening the grip on the screw and preventing the nut from loosening, thus achieving the anti-loosening requirement. Secondly, the conical teeth on the first convex cone can increase the friction between it and the first connected member, further improving the anti-loosening effect. Attached Figure Description

[0013] 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.

[0014] Figure 1 This is a schematic diagram of the structure of the present invention with a tapered spring washer;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model without the conical spring washer;

[0016] Figure 3 This is a schematic diagram of the first conical spring washer with conical teeth according to the present invention;

[0017] Figure 4 This is a schematic diagram of the first conical spring washer without conical teeth according to this utility model;

[0018] Figure 5 This is a schematic diagram of the screw structure of this utility model;

[0019] Figure 6 This is a schematic diagram of the structure of the nut with flange surface of this utility model;

[0020] Figure 7 This is a schematic diagram of the flangeless surface of the nut of this utility model.

[0021] Figure 8 This is a schematic diagram of the structure of the connected component of this utility model.

[0022] Figure label:

[0023] 1. Nut, 11. First cone, 111. Conical tooth, 2. Screw, 21. Second cone, 3. First connected part, 31. First concave cone, 4. First conical spring washer, 41. First conical surface, 42. Second conical surface, 5. Second connected part, 51. Second concave cone, 6. Second conical spring washer. Detailed Implementation

[0024] 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.

[0025] See attached document Figure 2 and attached Figure 8 This embodiment provides a tapered toothed threaded anti-loosening connection structure, including a nut 1 and a screw 2. The nut 1 has a first convex cone 11, and the internal thread of the nut 1 extends into the first convex cone 11. The first connected part 3 between the nut 1 and the screw 2 has a first concave cone 31. The first convex cone 11 and the first concave cone 31 cooperate, and the taper of the first concave cone 31 is greater than the taper of the first convex cone 11. This design ensures a tight fit between the screw 2, the nut 1, and the connected part, and maximizes the radial pressure of the thread at the first convex cone 11 of the nut 1, facilitating the locking of the screw 2. (See attached figure) Figure 6 The outer side of the first cone 11 is provided with tapered teeth 111. After the screw 2 passes through the first connected member 3 and the second connected member 5, it is threadedly connected to the nut 1. The first cone 11 abuts against the first concave cone 31. Because the nut 1 has multiple tapered teeth 111 at the first cone 11, the radial stiffness of the thread at this point is greatly reduced, while the axial stiffness and strength of the thread at this point are almost not reduced. Therefore, the thread at the first cone 11 of the nut 1 generates radial pressure under the squeezing force of the connected member, tightly holding the screw 2, achieving the requirement of a tight connection. When a loosening tendency occurs, the first connected member 3 tends to move upward, applying force to the nut 1. This force, along the first concave cone 31, causes the thread at the first cone 11 of the nut 1 to generate inward radial pressure, further tightening the grip on the screw 2 and preventing the nut 1 from loosening, achieving the requirement of anti-loosening. Secondly, the tapered teeth 111 on the first cone 11 can increase the friction between it and the first connected member 3, further improving the anti-loosening effect.

[0026] As another embodiment of this utility model: refer to the appendix Figure 1 and attached Figure 4A first conical spring washer 4 is provided between the first concave cone 31 and the first convex cone 11. The outer side of the first conical spring washer 4 has a first conical surface 41 that mates with the first concave cone 31, and the inner side of the first conical spring washer 4 has a second conical surface 42 that mates with the first convex cone 11. The taper of the second conical surface 42 is greater than that of the first convex cone 11. This design ensures that the nut 1 and the first conical spring washer 4 fit tightly and maximizes the radial pressure on the thread of the nut 1 at the first convex cone 11, facilitating the tightening of the screw 2. When a loosening tendency occurs, the first conical spring washer 4 tends to move upward under the action of the first connected part 3, applying force to the nut 1. This force, along the second conical surface 42, generates an inward radial pressure on the thread of the nut 1 at the first convex cone 11, further tightening the screw 2 and preventing the nut 1 from loosening, thus achieving the anti-loosening requirement. Secondly, the first conical spring washer 4 can also be used to reduce the stiffness of the connected parts and increase the preload to prevent loosening.

[0027] As another embodiment of this utility model: refer to the appendix Figure 3 The first conical surface 41 is provided with conical teeth 111. This design can increase the friction between the first conical spring washer 4 and the first connected part 3. The conical teeth 111 will reduce the radial stiffness of the first conical spring washer 4, making it easier to undergo radial deformation. Under the extrusion force of the first conical spring washer 4, the thread at the first convex cone 11 of the nut 1 generates radial pressure and tightly holds the screw 2.

[0028] As another embodiment of this utility model: refer to the appendix Figure 5 The screw 2 is provided with a second convex cone 21, and the second connected member 5 between the nut 1 and the screw 2 is provided with a second concave cone 51 that mates with the second convex cone 21. The outer side of the second convex cone 21 is provided with conical teeth 111. This arrangement can increase the friction between the screw 2 and the second connected member 5.

[0029] In another embodiment of this utility model: a second conical spring washer 6 is provided between the second concave cone 51 and the second convex cone 21. The outer side of the second conical spring washer 6 is provided with a third conical surface that mates with the second concave cone 51, and the inner side of the second conical spring washer 6 is provided with a fourth conical surface that mates with the second convex cone 21. The second conical spring washer 6 can increase the preload to prevent loosening, and can also tighten the screw 2 by radial deformation to further improve the anti-loosening effect.

[0030] In another embodiment of this utility model, the third conical surface is provided with conical teeth 111. The conical teeth 111 reduce the radial stiffness of the second conical spring washer 6, making it more prone to radial deformation. At the same time, it can also increase the friction between the second conical spring washer 6 and the second connected member 5.

[0031] As another embodiment of this utility model: the first conical spring washer 4 and the nut 1 are coaxially arranged, the second conical spring washer 6 and the second convex cone 21 are coaxially arranged. Through this structural design, the overall structure is simple and reasonable, the production precision requirements are low, it can be disassembled at any time, it will not generate a large eccentric load, the anti-loosening effect is excellent and the overall strength of the bolt is high.

[0032] Specifically, the first concave cone 31 and the second concave cone 51 are obtained by chamfering.

[0033] See attached document Figure 2 Because there is no need to install tapered spring washers, attached Figure 7 Nut 1 does not require a flange face. First, screw nut 1 with the first cone 11 into screw 2 and tightly connect it to the first connected part 3 until it is pressed. Since nut 1 has multiple evenly distributed conical teeth 111 at the first cone 11, the radial stiffness of the thread at this point is greatly reduced, while the axial stiffness and strength of the thread at this point are almost not reduced. Therefore, the thread at the first cone 11 of nut 1 generates radial pressure under the extrusion force of the first connected part 3, tightly gripping screw 2 to achieve the fastening connection and strength requirements.

[0034] See attached document Figure 1 Because it is necessary to install tapered spring washers, attached Figure 6 The nut 1 needs to press the first conical spring washer 4 against the flange face. First, the screw 2 is passed through one conical spring washer and two connected parts. Then, another conical spring washer is placed on the first connected part 3, with the conical surface of the conical spring washer connected to the connected part. Then, the nut 1 is screwed on, so that the first convex cone 11 of the nut 1 is in close contact with the second conical surface 42 of the first conical spring washer 4 until it is pressed tightly. Since there are multiple evenly distributed conical teeth 111 on the conical spring washer, the friction between the conical spring washer and the connected parts can be increased. The conical teeth 111 will reduce the radial stiffness of the conical spring washer, making it easier to undergo radial deformation. The thread at the first convex cone 11 of the nut 1 generates radial pressure under the squeezing force of the conical spring washer, tightly holding the screw 2, achieving the fastening connection and strength requirements.

[0035] 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 tapered toothed threaded anti-loosening connection structure, characterized in that, The device includes a nut and a screw. The nut has a first convex cone, and the internal thread of the nut extends into the first convex cone. The first connected part between the nut and the screw has a first concave cone. The first convex cone and the first concave cone cooperate with each other, and the taper of the first concave cone is greater than the taper of the first convex cone. The outer side of the first convex cone has tapered teeth.

2. The tapered toothed threaded anti-loosening connection structure according to claim 1, characterized in that, A first conical spring washer is provided between the first concave cone and the first convex cone. The outer side of the first conical spring washer is provided with a first conical surface that mates with the first concave cone. The inner side of the first conical spring washer is provided with a second conical surface that mates with the first convex cone, and the taper of the second conical surface is greater than the taper of the first convex cone.

3. The tapered toothed threaded anti-loosening connection structure according to claim 2, characterized in that, The first conical surface is provided with conical teeth.

4. The tapered toothed threaded anti-loosening connection structure according to claim 3, characterized in that, The first conical spring washer and the nut are coaxially arranged.

5. The tapered toothed threaded anti-loosening connection structure according to claim 4, characterized in that, The screw is provided with a second convex cone, and the second connected member between the nut and the screw is provided with a second concave cone that mates with the second convex cone. The outer side of the second convex cone is provided with conical teeth.

6. The tapered toothed threaded anti-loosening connection structure according to claim 5, characterized in that, A second conical spring washer is provided between the second concave cone and the second convex cone. The outer side of the second conical spring washer is provided with a third conical surface that mates with the second concave cone, and the inner side of the second conical spring washer is provided with a fourth conical surface that mates with the second convex cone.

7. The tapered toothed threaded anti-loosening connection structure according to claim 6, characterized in that, The third cone surface is provided with conical teeth.

8. The tapered toothed threaded anti-loosening connection structure according to claim 7, characterized in that, The second conical spring washer and the second convex cone are coaxially arranged.

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