Check bolt structure with combination of curved fluted disc and fan-blade-shaped elastic washer

Abstract

A lock bolt structure combined by a curved fluted disc and a fan-blade-shaped elastic washer comprises a bolt and a nut, and the nut comprises a pair of structural self-locking positive nut and structural self-locking negative nut which are provided with fluted disc structures; a fan-blade-shaped elastic gasket is arranged between the group of nuts; the bolt screw rod is a Down thread rod; threads with the same screwing direction as the fluted disc structure are arranged in the structure self-locking positive nut; and the thread screwing direction of the structure self-locking reverse nut is opposite to that of the structure self-locking positive nut. In the process that the structural self-locking positive nut and the structural self-locking negative nut are screwed into the screw rod in the mode that the bottoms of the structural self-locking positive nut and the structural self-locking negative nut are opposite, due to the fact that all end face fluted disc structures are staggered with all fan blades of the gasket, the fan blades of the gasket have enough elasticity; when the structural self-locking positive nut and the structural self-locking negative nut are screwed in, the structural self-locking positive nut and the structural self-locking negative nut make contact with the fan blades respectively, the irregular curved surfaces are prone to being meshed in a staggered mode through elasticity of the fan blades, the fan blades restrain the bottom end face mutually, and therefore the anti-loosening and locking purposes are achieved.

Description

Technical Field

[0001] This utility model relates to the field of fastener anti-loosening, specifically to an anti-loosening bolt structure combining a curved toothed disc and a fan-shaped elastic washer. Background Technology

[0002] Bolted connections are widely used in various critical structural connections, such as aero engines and satellite load-bearing cylinders. However, such structures are susceptible to environmental factors such as vibration, shock, and thermal shock, which can cause the bolts to loosen and lead to machine failure.

[0003] However, existing bolt anti-loosening structures either employ complex structural designs, use too many small parts, or cannot withstand the impact of continuous vibration. Therefore, it is necessary to design a bolt anti-loosening structure with higher reliability while minimizing structural complexity. Summary of the Invention

[0004] The purpose of this utility model is to address the defects and shortcomings of existing thread anti-loosening technologies by providing an anti-loosening bolt structure. This structure uses a combination of positive and negative nuts with end-face ratchet structures and fan-shaped elastic washers to solve the problem of bolt loosening in bolted connection structures.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] A non-loosening bolt structure combining a curved toothed disc and a fan-shaped elastic washer, comprising a bolt and a nut, characterized in that the nut is composed of a pair of self-locking positive nuts and self-locking negative nuts with a toothed disc structure; a fan-shaped elastic washer is provided between the self-locking positive nuts and the self-locking negative nuts; the bolt thread is a Tang-style threaded rod; the self-locking positive nuts have threads with the same direction of rotation as the toothed disc structure; the self-locking negative nuts have threads with the opposite direction of rotation to the self-locking positive nuts.

[0007] Furthermore, the fan-shaped elastic washer includes a central shaft ring fitted on the screw and fan blades evenly distributed on the central shaft ring. The fan blade has a concave curved surface in the middle, and the concave curved surface and the non-concave part of the fan blade form a simply supported beam structure. The two edges of the fan blade have chamfers. The thickness of the fan-shaped elastic washer is equal to the sum of the root distances of the self-locking positive and negative nut curved surface toothed disc structures.

[0008] Furthermore, the bolt is a Tang-style threaded rod, and the toothed disc structure at the bottom of the corresponding surfaces of the self-locking positive nut and the self-locking negative nut is a ratchet tooth surface structure composed of a curved tooth circumferential array. Each toothed disc structure has a circular groove at the threaded hole on its end face to reserve space for the central shaft ring of the fan-shaped elastic washer.

[0009] Furthermore, the ratchet tooth surface structure of the self-locking positive nut and the self-locking negative nut consists of a working tooth surface and an arc-shaped non-working tooth surface. The depth of the circular groove is half the height of the central ring of the fan-shaped elastic washer, so as to avoid axial misalignment of the fan-shaped elastic washer when screwing in the self-locking negative nut.

[0010] Furthermore, the self-locking positive nut and the self-locking negative nut can respectively engage with the fan blades of the fan-shaped elastic washer through their respective end face curved toothed disc structures, so that when the bolt is subjected to vibration or external force, the positive and negative nuts restrain each other, while the fan blade-shaped elastic washer provides elastic support and friction to prevent the nut from loosening, thereby achieving a reliable anti-loosening effect.

[0011] When installing this bolt structure, place the head of the self-locking positive nut onto the screw rod and rotate it until the head of the self-locking positive nut presses against the connected part. Then, place the ratchet wheel of the fan-shaped elastic washer with its groove facing the end face of the self-locking positive nut onto the screw rod. Finally, place the bottom of the self-locking negative nut onto the screw rod and rotate it until its bottom is close to the non-recessed surface of the fan-shaped elastic washer. Because each fan-shaped elastic washer has a certain elasticity in the axial direction, when the self-locking negative nut is screwed in, the non-working tooth surface of the curved tooth surface of the self-locking negative nut and the fan-shaped elastic washer can lift each other and then spring back until the tooth surfaces of the self-locking positive and negative nuts mesh with the two edges of the fan-shaped elastic washer, successfully locking the bolt. In actual use, after installation, the self-locking positive nut will be normally tightened by preload, forming the first layer of locking. The working teeth of the self-locking positive nut fully engage with the edge surface of the fan-shaped elastic washer. When the self-locking positive nut is unscrewed, it is constrained by the edge surface of the fan-shaped elastic washer, forming a second layer of locking. The self-locking positive nut is subjected to the force of the threaded rod, which is opposite to the unscrewing direction of the self-locking negative nut, forming a third layer of locking. The self-locking positive nut is subjected to the axial elastic force of the fan-shaped elastic washer, forming a fourth layer of locking. The working teeth of both the self-locking positive nut and the self-locking negative nut fully engage with the two edge surfaces of the fan-shaped elastic washer, respectively. When the self-locking negative nut is unscrewed, it is constrained by the working teeth, forming a locking of the self-locking negative nut. During disassembly, the self-locking nut is rotated in the reverse direction. The two edge surfaces of the fan-shaped elastic washer are constrained by the working tooth surfaces of the ratchet structure on the end face of the self-locking nut and the self-locking nut. One side of the fan-shaped elastic washer has a concave curved surface, which forms a simply supported beam structure with the non-concave part. After being subjected to torque, the fan-shaped structure bends towards the inner side of the arc-shaped concave surface. The non-concave surface bends and presses against the arc-shaped concave surface of the self-locking nut. The self-locking nut is lifted by the thread, causing the edge surface of the fan-shaped elastic washer to detach from the tooth surface and spring back, thus completing the disassembly.

[0012] The beneficial effects of this utility model are: the bolt anti-loosening structure is ingenious, it adopts a completely mechanical self-locking structure, there are no small parts, it is easier to produce, and it can be mass-produced through machining or powder metallurgy processing. The installation and operation are simple and easy, the maintenance cost is lower, and it can effectively solve the problem of bolt loosening in bolt connection structures. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of 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 to explain the principles of this utility model. Furthermore, it is obvious that the drawings described below are merely some embodiments of this utility model; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 and Figure 1 Schematic diagram of the self-locking positive nut structure in the middle;

[0016] Figure 3 yes Figure 1 Schematic diagram of the self-locking reverse nut structure in the middle;

[0017] Figure 4 These are schematic cross-sectional views of a self-locking positive nut and a self-locking negative nut.

[0018] Figure 5 This is a schematic diagram of the fan-shaped elastic washer structure.

[0019] Figure 6 This is a schematic diagram of the bolt anti-loosening structure locking.

[0020] Figure 7 This is a schematic diagram of the locking section of the bolt anti-loosening structure;

[0021] In the diagram: 1. Self-locking positive nut; 2. Self-locking negative nut; 3. Screw head; 4. Screw rod; 5. Bolt; 6. Fan-shaped elastic washer; 7. Gear structure; 8. Arc-shaped non-working tooth surface; 9. Fan-blade edge surface structure; 10. Working tooth surface; 11. Circumferential countersunk groove of the threaded hole of the positive nut; 12. Circumferential countersunk groove of the threaded hole of the negative nut; 13. Curved surface of the non-working tooth surface of the negative nut; 14. Working tooth surface of the negative nut; 15. Recessed surface of the non-working tooth surface of the negative nut; 16. Curved surface of the fan-blade structure; 17. Central ring of the fan-shaped elastic washer. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] See Figure 1 As shown, the technical solution adopted in this specific embodiment is: an anti-loosening bolt structure combining a curved toothed disc and a fan-shaped elastic washer, comprising a bolt 5 and a nut. The bolt 5 includes a screw head 3 and a screw 4. The nut consists of a pair of self-locking positive nuts 1 and self-locking negative nuts 2 with a toothed disc structure. A fan-shaped elastic washer 6 is provided between the self-locking positive nuts 1 and the self-locking negative nuts 2. The bolt screw is a Donnerian threaded rod. The self-locking positive nut has a thread with the same helix direction as the toothed disc structure. The self-locking negative nut has a thread with the opposite helix direction to the self-locking positive nut. The Donnerian thread specification matches the threads of the self-locking positive nut 1 and the self-locking negative nut 2.

[0024] See Figure 2 , 4 As shown, the self-locking nut 1 has a toothed disc structure 7, a working tooth surface 10, an arc-shaped non-working tooth surface 8, and a circumferential groove 11 around the threaded hole of the nut. The depth of the groove is half the thickness of the fan-shaped elastic washer central ring 17 of the fan-shaped elastic washer 6, and the nut head is a conventional hexagonal prism structure.

[0025] See Figure 3 , 4 As shown, the self-locking reverse nut 2 end face toothed disc structure includes a reverse nut working tooth surface 14, a reverse nut non-working tooth surface curved surface 13, a reverse nut non-working tooth surface recess 15, and a circumferential countersunk groove 12 for the reverse nut threaded hole in the middle. The circumferential countersunk groove 12 for the reverse nut threaded hole has the same characteristics as the circumferential countersunk groove 11 for the regular nut threaded hole.

[0026] See Figure 5 As shown, the fan-shaped elastic washer 6 includes a central fan-shaped elastic washer shaft ring 17 fitted on the screw and fan blades evenly distributed on the central shaft ring. The fan blade has a concave curved surface structure in the middle, which is the fan blade structure curved surface 16. The fan blade edge surface structure 9 is formed by setting chamfers on both edges of the fan blade. The concave curved surface and the non-concave part of the fan blade form a simply supported beam structure. The thickness of the fan-shaped elastic washer 6 is equal to the sum of the root distances of the self-locking positive and negative nut curved surface toothed disc structures.

[0027] See Figure 6 As shown, the end face ratchet of the self-locking positive nut and the toothed disc structure and end face ratchet structure of the self-locking negative nut respectively mesh with the fan-shaped elastic washer, and the working tooth surface 10 of the self-locking positive nut and the working tooth surface 14 of the self-locking negative nut respectively fit with the edge surface 9 of the fan-shaped elastic washer fan blade structure.

[0028] See Figure 7As shown, the circumferential countersunk groove 11 of the positive nut threaded hole and the circumferential countersunk groove 12 of the negative nut threaded hole respectively fit into the central shaft ring 17 of the fan-shaped elastic washer.

[0029] During dismantling, the self-locking reverse nut is rotated in the opposite direction. The fan-blade-shaped elastic washer edge surface structure 9 is constrained by the working tooth surface 10 of the self-locking positive nut gear disk structure and the working tooth surface 14 of the self-locking reverse nut. Because the curved surface 16 of the fan blade structure forms a simply supported beam structure with the non-recessed part, it bends towards the inner side of the arc-shaped recess after being subjected to torque. The non-recessed surface bends and presses against the non-working tooth surface recess 15 of the reverse nut. The self-locking reverse nut is lifted by the thread, causing the fan blade edge surface structure 9 to detach from the working tooth surface 14 of the reverse nut and spring back, thus completing the dismantling.

[0030] The specific steps for fastening connected parts using the anti-loosening bolt structure described in this utility model are as follows:

[0031] First, place the head of the self-locking positive nut 1 onto the screw 4 and rotate it normally until the head of the self-locking positive nut 1 presses against the connected part. Second, after confirming a proper fit, place the fan-shaped elastic washer 6 (with the grooved part facing the toothed surface of the self-locking positive nut) onto the screw 4. After confirming a proper fit, place the bottom of the self-locking reverse nut 2 onto the screw 4 and rotate it until the bottom of the reverse nut 2 is close to the ungrooved surface of the fan-shaped elastic washer 6. Because each fan-shaped blade of the fan-shaped elastic washer has a certain elasticity in the axial direction, when the reverse nut 2 is screwed in, the non-working toothed surface of the ratchet on the end face of the reverse nut and each fan-shaped blade surface of the fan-shaped elastic washer can lift each other and then spring back, thus engaging and locking, forming a quadruple locking of the self-locking positive nut 1 and the self-locking reverse nut 2, finally achieving a locked state.

[0032] During dismantling, the self-locking reverse nut 2 is rotated in the opposite direction. The fan-blade-shaped elastic washer edge surface structure 9 is constrained by the working tooth surface 10 of the self-locking positive nut tooth disk structure and the working tooth surface 14 of the reverse nut. Because the curved surface 16 of the fan blade structure forms a simply supported beam structure with the non-recessed part, it bends towards the inner side of the arc-shaped recess after being subjected to torque. The non-recessed surface bends and presses against the non-working tooth surface recess 15 of the reverse nut. The self-locking reverse nut 2 is lifted by the thread, causing the fan blade edge surface structure 9 to detach from the working tooth surface 14 of the reverse nut and spring back, thus completing the dismantling.

[0033] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A locking bolt structure combining a curved toothed disc and a fan-shaped elastic washer, comprising a bolt and a nut, characterized in that, The nut consists of a pair of self-locking positive nuts and self-locking negative nuts with a toothed disc structure; a fan-shaped elastic washer is provided between the self-locking positive nuts and the self-locking negative nuts; the bolt shank is a Tang-style threaded rod; the self-locking positive nuts have threads with the same direction of rotation as the toothed disc structure; the self-locking negative nuts have threads with the opposite direction of rotation to the self-locking positive nuts.

2. The anti-loosening bolt structure combining a curved toothed disc and a fan-shaped elastic washer according to claim 1, characterized in that, The fan-shaped elastic washer includes a central shaft ring fitted on the screw and fan blades evenly distributed on the central shaft ring. The fan blade has a concave curved surface in the middle, and the concave curved surface and the non-concave part of the fan blade form a simply supported beam structure. The two edges of the fan blade have chamfers. The thickness of the fan-shaped elastic washer is equal to the sum of the root distances of the self-locking positive and negative nut curved surface toothed disc structures.

3. The anti-loosening bolt structure combining a curved toothed disc and a fan-shaped elastic washer according to claim 2, characterized in that, The bottom of the corresponding surfaces of the self-locking positive nut and the self-locking negative nut are provided with a toothed disc structure, which is a ratchet tooth surface structure composed of a curved tooth circumferential array. The periphery of the threaded hole on the end face of each toothed disc structure is provided with a circular groove to reserve space for the central shaft ring of the fan-shaped elastic washer.

4. The anti-loosening bolt structure combining a curved toothed disc and a fan-shaped elastic washer according to claim 3, characterized in that, The ratchet tooth surface structure of the self-locking positive nut and the self-locking negative nut consists of a working tooth surface and an arc-shaped non-working tooth surface, and the depth of the circular groove is half the height of the shaft ring in the fan-shaped elastic washer.

5. The anti-loosening bolt structure combining a curved toothed disc and a fan-shaped elastic washer according to claim 1, characterized in that, The self-locking positive nut and the self-locking negative nut can respectively engage with the fan-shaped elastic washer through their respective end-face curved toothed disc structures.

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