Bolt and nut locking device

Abstract

The invention belongs to the technical field of bolt and nut locking, and relates to a bolt and nut locking device. The bolt comprises a bolt head, a bolt column, a nut, a flat washer and a saddle-shaped elastic washer, the bolt head is connected to one end of the bolt column. The nut is in threaded connection with the bolt column. A slot is formed in the flat washer, and one side of the saddle-shaped elastic washer is matched with the slot in an inserting manner; and after one side of the saddle-shaped elastic washer is inserted into the slot, the flat washer and the saddle-shaped elastic washer form a V shape. Compared with a traditional method that a nut is screwed to a bolt head in a long stroke to prevent scattering, the device has the advantages that the flat washer and the saddle-shaped elastic washer are designed to be of the V-shaped structure capable of being combined in an inserted mode, so that the nut only needs to be screwed into a short stroke, enough elastic deformation and friction force can be generated by extruding the saddle-shaped elastic washer, and the temporary locking state is achieved. The process is labor-saving and quick to operate. During formal installation, additional complex operation is not needed, the workload of assembly workers is reduced on the whole, and the working efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of bolt and nut locking technology, and relates to a bolt and nut locking device. Background Technology

[0002] Bolts, nuts, and washers, as the most basic mechanical fastening components, are widely used in the assembly and connection of various equipment, structures, and products. A standard bolt-nut connection typically includes a bolt, a nut, and one or more flat washers or elastic washers. Flat washers primarily protect the surfaces of the connected parts and distribute compressive stress, while elastic washers provide continuous elasticity to compensate for preload loss due to vibration, thermal expansion and contraction, etc., preventing the nut from loosening. During storage and transportation, bolts, nuts, flat washers, and elastic washers are usually treated as loose parts. To avoid losing small parts, a common practice is to temporarily place the washer on the bolt and screw on the nut. However, this method cannot withstand the circumferential forces generated by vibration and shaking during transportation. The nut is very likely to rotate on the bolt shank or even loosen, causing parts to scatter, making inventory and retrieval inconvenient and affecting assembly efficiency.

[0003] To prevent scattering, fully tightening the nuts to press them firmly against the bolt head and washer before transportation can effectively prevent loosening, but it requires a long screw-in stroke, which is time-consuming and labor-intensive. Upon arrival at the usage site, the nuts must be completely loosened and disassembled before formal installation, adding unnecessary workload.

[0004] To address the above problems, this invention proposes a bolt and nut locking device. Summary of the Invention

[0005] To address the problems existing in the background art, the present invention proposes a bolt and nut locking device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a bolt and nut locking device, comprising a bolt head, a bolt post, a nut, a flat washer, and a saddle-shaped elastic washer; the bolt head is connected to one end of the bolt post, and the nut is threadedly connected to the bolt post; the flat washer has a slot, and one side of the saddle-shaped elastic washer is inserted into the slot; after one side of the saddle-shaped elastic washer is inserted into the slot, the flat washer and the saddle-shaped elastic washer form a V-shape.

[0007] Furthermore, both the inner and outer rings of the flat washer and the saddle-shaped elastic washer are provided with rounded corners.

[0008] Furthermore, the nut includes a cone and a nut sleeve; the cone is threaded to a bolt post, and the nut sleeve has a tapered groove that matches the cone; the nut sleeve slides with the cone; a locking component is provided between the cone and the nut sleeve, and an unlocking component is provided with the nut sleeve.

[0009] Furthermore, the locking component includes a locking block, which is elastically slidably disposed on the outer circumference of the cone, and a magnet that is attracted and engaged with the locking block is fixed inside the nut sleeve.

[0010] Furthermore, the unlocking component includes a connecting piece, with connecting plates connected to both ends of the connecting piece, and a plug rod installed on the connecting plate; the nut sleeve has a socket that mates with the plug rod, and the plug rod is inserted into the socket to push the locking block away from the nut sleeve.

[0011] Furthermore, the connecting piece is elastic and arc-shaped.

[0012] Furthermore, a sliding groove is provided on the outer circumference of the cone, the locking block is slidably disposed in the sliding groove, a tension spring is provided in the sliding groove, and the tension spring is fixedly connected to the locking block and the cone; a locking groove adapted to the locking block is provided on the inner side wall of the conical groove, and the insertion hole communicates with the locking groove; the magnet is fixed at the end of the locking groove away from the axis of the nut sleeve.

[0013] Compared with the prior art, the present invention has the following beneficial effects: Compared to the traditional method of tightening the nut all the way to the bolt post to prevent it from scattering, this device uses a pluggable V-shaped structure for the flat washer and saddle-shaped elastic washer. This allows the nut to be screwed in only a short stroke, generating sufficient elastic deformation and friction by compressing the saddle-shaped elastic washer to achieve a temporary locking state. This process is labor-saving and quick. During formal installation, no additional complex operations are required, reducing the workload of assembly workers and improving work efficiency.

[0014] The detachable design of the cone and nut sleeve allows for secure tightening by combining the two components, which can be operated with ordinary tools. After tightening, the locking mechanism unlocks the cone and nut sleeve, allowing the nut sleeve to be removed. The remaining cone cannot be disassembled with conventional tools, achieving an anti-theft effect. For authorized disassembly, simply reattaching the nut sleeve automatically restores the lock, enabling disassembly. The entire anti-theft and unlocking process requires no damage to any parts, allowing for nut reuse and reducing maintenance costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention in the first direction; Figure 2 This is a schematic diagram of the overall structure of the present invention in the second direction; Figure 3 This is a cross-sectional view of the flat washer and the saddle-shaped elastic washer in this invention; Figure 4 This is a schematic diagram of the state when the flat washer and the saddle-shaped elastic washer are connected in a V-shape in this invention; Figure 5 This is a schematic diagram showing the state of the saddle-shaped elastic washer inserted into the slot in this invention; Figure 6 This is a schematic diagram of the flat washer in this invention; Figure 7 This is a schematic diagram of the saddle-shaped elastic washer in this invention; Figure 8 This is a schematic diagram showing the state of the flat washer and the saddle-shaped elastic washer when the present invention is used for fastening; Figure 9 This is a schematic diagram of the installation of the present invention when it is used for fastening; Figure 10 This is a schematic diagram of the state in which the nut is installed on the bolt post in Embodiment 2 of the present invention; Figure 11 This is a cross-sectional view of the nut sleeve in this invention; Figure 12 In this invention Figure 11 Enlarged view of part A; Figure 13 This is a schematic diagram showing the state of the cone body being installed on the bolt column in this invention; Figure 14 This is a schematic diagram of the vertebral body in this invention; Figure 15 This is a schematic diagram of the nut sleeve in this invention; Figure 16 This is a schematic diagram of the unlocking component in this invention.

[0016] In the diagram: 1. Bolt head; 2. Bolt post; 3. Nut; 4. Flat washer; 5. Slot; 6. Saddle-shaped elastic washer; 7. Rounded corner; 8. Cone; 9. Thread; 10. Clamping block; 11. Tension spring; 12. Nut sleeve; 13. Tapered groove; 14. Clamping groove; 15. Magnet; 16. Insertion hole; 17. Connecting piece; 18. Connecting plate; 19. Insert rod. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1: As Figures 1-9 As shown, the technical solution adopted by the present invention is as follows: a bolt and nut locking device, comprising a bolt head 1, a bolt post 2, a nut 3, a flat washer 4, and a saddle-shaped elastic washer 6.

[0019] Bolt head 1 is fixedly connected to one end of bolt post 2, and nut 3 is threadedly connected to bolt post 2. A slot 5 is provided on one side of flat washer 4, and one side of saddle-shaped elastic washer 6 is inserted into slot 5. For example... Figure 3 As shown, after one side of the saddle-shaped elastic washer 6 is inserted into the slot 5, the flat washer 4 and the saddle-shaped elastic washer 6 form a V-shape.

[0020] The inner and outer rings of the flat washer 4 and the saddle-shaped elastic washer 6 are both provided with rounded corners 7 to reduce interference and wear during assembly and improve assembly smoothness.

[0021] Working principle: During transportation or storage, to prevent scattering and facilitate subsequent use, the flat washer 4, the saddle-shaped elastic washer 6, and the nut 3 are all installed onto the bolt post 2. Specifically, as follows... Figure 5 As shown, first, insert the saddle-shaped elastic washer 6 into the slot 5 with its convex side facing down. At this time, the flat washer 4 and the saddle-shaped elastic washer 6 form a V-shape. Then, the flat washer 4 and the saddle-shaped elastic washer 6, connected together, are fitted onto the bolt post 2, with the flat washer 4 in contact with the bolt head 1. Then, the nut 3 is threaded onto the bolt post 2. During the screwing of the nut 3, the nut 3 contacts the saddle-shaped elastic washer 6. Then, using one hand, keep the flat washer 4 and the saddle-shaped elastic washer 6 in place relative to the bolt head 1, while using the other hand, continue to rotate the nut 3, causing the nut 3 to push the saddle-shaped elastic washer 6 towards the bolt head 1, thereby causing the saddle-shaped elastic washer 6 to undergo elastic deformation and store energy. When the saddle-shaped elastic washer 6 exhibits significant elastic deformation and the tightening resistance increases significantly, stop rotating the nut 3. The state at this point is as follows. Figures 1-3 As shown.

[0022] At this point, under the elastic action of the saddle-shaped elastic washer 6, the nut 3 is subjected to a force pointing away from the bolt head 1. Simultaneously, the bolt head 1, flat washer 4, saddle-shaped elastic washer 6, and nut 3 are tightly fitted together in sequence, generating significant friction. This configuration effectively prevents the nut 3 from rotating loose or falling off due to vibration during transportation.

[0023] Since the flat washer 4 and the saddle-shaped elastic washer 6 form a V-shape when the saddle-shaped elastic washer 6 is inserted into the slot 5, it is only necessary to move the nut 3 a small distance along the bolt post 2 to make the nut 3 abut against the saddle-shaped elastic washer 6 and cause the saddle-shaped elastic washer 6 to deform elastically.

[0024] When needed, unscrew the nut 3 from the bolt post 2, and then remove the flat washer 4 and the saddle-shaped elastic washer 6 from the bolt post 2. Then separate the saddle-shaped elastic washer 6 from the flat washer 4. Afterward, insert the bolt post 2 into the through hole on the part to be tightened, such as... Figure 8 and Figure 9Place the flat washer 4 onto the bolt post 2, then place the saddle-shaped elastic washer 6 onto the bolt post 2 with the convex side facing down. Finally, tighten the nut 3 onto the bolt post 2 to complete the fixing operation. The bolt post 2, nut 3, flat washer 4, and saddle-shaped elastic washer 6 are a common combination. The flat washer 4 can protect the surface of the fixed object and distribute pressure, while the saddle-shaped elastic washer 6 can prevent the nut 3 from loosening.

[0025] Compared to the traditional method of tightening the nut 3 to the bolt post 2 with a long stroke to prevent it from scattering, this device designs the flat washer 4 and the saddle-shaped elastic washer 6 as a pluggable V-shaped structure. This allows the nut 3 to be screwed in only a short stroke, generating sufficient elastic deformation and friction by compressing the saddle-shaped elastic washer 6 to achieve a temporary locking state. This process is labor-saving and quick. During formal installation, no additional complex operations are required, reducing the workload of assembly workers and improving work efficiency.

[0026] Example 2: Figures 10-16 As shown, the nut 3 includes a cone body 8 and a nut sleeve 12. The inner side of the cone body 8 has a thread 9 for threaded connection with the bolt post 2. The nut sleeve 12 has a tapered groove 13 that matches the shape of the cone body 8. The nut sleeve 12 slides with the cone body 8 through the tapered groove 13.

[0027] A locking assembly is provided between the cone body 8 and the nut sleeve 12. The locking assembly includes a locking block 10. A sliding groove is formed on the outer circumference of the cone body 8, and the locking block 10 is elastically slidably disposed in the sliding groove. A tension spring 11 is disposed in the sliding groove, with one end of the tension spring 11 fixedly connected to the locking block 10 and the other end fixedly connected to the cone body 8. A slot 14 adapted to the locking block 10 is formed on the inner wall of the conical groove 13. A magnet 15 is fixedly connected to the end wall of the slot 14 away from the axis of the nut sleeve 12, and the magnet 15 is attracted and engaged with the locking block 10. When the nut sleeve 12 is fitted onto the cone body 8, one end of the locking block 10 is inserted into the slot 14 and attracted and fixed by the magnet 15, thereby achieving locking between the nut sleeve 12 and the cone body 8. At this time, the cone body 8 can be rotated by rotating the nut sleeve 12, so that the cone body 8 moves along the axial direction of the bolt post 2.

[0028] In this embodiment, two sliding grooves are provided and symmetrically arranged. A locking block 10 is slidably disposed within each of the two sliding grooves. The symmetrical arrangement of the two locking blocks 10 increases the stability of the connection between the cone 8 and the nut sleeve 12.

[0029] The nut sleeve 12 is also equipped with an unlocking component to release the lock between the nut sleeve 12 and the cone 8, so that the nut sleeve 12 can be removed from the cone 8, exposing the outer surface of the cone 8. Since the outer surface of the cone 8 is a conical surface, it can play a role in preventing theft.

[0030] The unlocking assembly includes a connecting piece 17 and a plug rod 19. The connecting piece 17 is elastic and arc-shaped. Connecting plates 18 are fixedly connected to both ends of the connecting piece 17, and plug rods 19 are fixedly connected to the ends of the two connecting plates 18 furthest from the connecting piece 17. An insertion hole 16 communicating with a slot 14 is provided on the outer surface of the nut sleeve 12. The plug rod 19 engages with the insertion hole 16. When the plug rod 19 is inserted into the insertion hole 16, it pushes the locking block 10, causing the locking block 10 to move inward against the attraction of the magnet 15. The locking block 10 disengages from the slot 14, releasing the lock between the nut sleeve 12 and the cone 8. The nut sleeve 12 can then be removed from the cone 8, exposing the conical surface of the cone 8 for anti-theft purposes.

[0031] Working principle: Initially, the locking block 10 is inserted into the locking slot 14, and the magnet 15 attracts and fixes the locking block 10. At this time, ordinary tools can be used to rotate the nut sleeve 12, thereby driving the cone 8 to rotate, so as to tighten the cone 8 onto the bolt post 2. At this time, the tension spring 11 is in a stretched state.

[0032] After installation and tightening, insert the two inserts 19 into the two sockets 16 respectively. The inserts 19 push the locking block 10, causing it to overcome the attraction of the magnet 15. Then, under the restoring force of the tension spring 11, the locking block 10 retracts inward, causing it to disengage from the slot 14, thereby releasing the lock between the nut sleeve 12 and the cone 8. The nut sleeve 12 can then be removed from the cone 8. The outer surface of the cone 8 is a smooth conical surface, which cannot be gripped and rotated by ordinary wrenches or tools, thus achieving anti-theft protection.

[0033] When it is necessary to unscrew the nut 3 from the bolt post 2, the nut sleeve 12 is placed on the cone 8. The nut sleeve 12 is slowly rotated by hand. When the slot 14 is aligned with the sliding groove, the locking block 10 moves outward and inserts into the slot 14 under the attraction of the magnet 15, and the locking block 10 is attracted to the magnet 15. This locks the cone 8 and the nut sleeve 12 back together. The nut sleeve 12 can then be rotated using ordinary tools. The nut sleeve 12 drives the cone 8 to rotate, thereby unscrewing the cone 8 from the bolt post 2.

[0034] The detachable design of the cone 8 and nut sleeve 12 allows for secure fastening; when tightened, they are integrated and can be operated with ordinary tools. After tightening, the locking mechanism unlocks the cone 8 and nut sleeve 12, allowing the nut sleeve 12 to be removed. The remaining cone 8 cannot be disassembled with conventional tools, achieving an anti-theft effect. For authorized disassembly, simply reattaching the nut sleeve 12 automatically restores the lock for disassembly. The entire anti-theft and unlocking process requires no damage to any parts, enabling the nut 3 to be reused and reducing maintenance costs.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bolt and nut locking device, characterized in that: It includes a bolt head (1), a bolt post (2), a nut (3), a flat washer (4), and a saddle-shaped elastic washer (6); the bolt head (1) is connected to one end of the bolt post (2), and the nut (3) is threaded to the bolt post (2); the flat washer (4) has a slot (5), and one side of the saddle-shaped elastic washer (6) is inserted into the slot (5); after one side of the saddle-shaped elastic washer (6) is inserted into the slot (5), the flat washer (4) and the saddle-shaped elastic washer (6) form a V-shape.

2. The bolt and nut locking device according to claim 1, characterized in that: The inner and outer rings of the flat washer (4) and the saddle-shaped elastic washer (6) are both provided with rounded corners (7).

3. The bolt and nut locking device according to claim 1, characterized in that: The nut (3) includes a cone (8) and a nut sleeve (12); the cone (8) is threadedly connected to the bolt post (2), and the nut sleeve (12) has a conical groove (13) that matches the cone (8); the nut sleeve (12) slides with the cone (8); a locking component is provided between the cone (8) and the nut sleeve (12), and an unlocking component is provided in cooperation with the nut sleeve (12).

4. A bolt and nut locking device according to claim 3, characterized in that: The locking assembly includes a locking block (10), which is elastically slidably disposed on the outer circumference of the cone (8), and a magnet (15) is fixed inside the nut sleeve (12) to be attracted and engaged with the locking block (10).

5. A bolt and nut locking device according to claim 4, characterized in that: The unlocking component includes a connecting piece (17), both ends of which are connected to a connecting plate (18), and a plug rod (19) is installed on the connecting plate (18); the nut sleeve (12) has a socket (16) that mates with the plug rod (19), and the plug rod (19) is inserted into the socket (16) to push the locking block (10) away from the nut sleeve (12).

6. A bolt and nut locking device according to claim 5, characterized in that: The connecting piece (17) is elastic and arc-shaped.

7. A bolt and nut locking device according to claim 5, characterized in that: A sliding groove is provided on the outer circumference of the cone (8), and the locking block (10) is slidably disposed in the sliding groove. A tension spring (11) is provided in the sliding groove, and the tension spring (11) is fixedly connected to the locking block (10) and the cone (8). A locking groove (14) adapted to the locking block (10) is provided on the inner side wall of the conical groove (13), and the insertion hole (16) is connected to the locking groove (14). The magnet (15) is fixed at one end of the locking groove (14) away from the axis of the nut sleeve (12).

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