A type of anti-loosening bolt structure

Abstract

This utility model relates to an anti-loosening bolt structure, including a connecting shaft, a bolt post, and an anti-loosening washer. The anti-loosening washer has a groove on its top and a locking ring fixedly connected to its bottom. The anti-loosening washer is located on the outside of the bolt post. The connecting shaft has a threaded groove on its top, which is threadedly connected to the bolt post. The locking ring contacts the connecting shaft. The beneficial effects of this utility model are that when scissors are cutting, the blade body is subjected to alternating shearing force and leverage force. The anti-loosening washer and locking ring can effectively counteract the loosening tendency caused by vibration, ensuring the hinge stability of the blade body and keeping the cutting edge precisely aligned, thus improving cutting accuracy. The groove further enhances the anti-loosening effect, maintaining a tight connection even with long-term high-frequency opening and closing, reducing problems such as "biting" and "uneven cutting edges." Furthermore, the anti-loosening washer can be replaced individually, reducing tool maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of tool connector technology, and in particular to an anti-loosening bolt structure. Background Technology

[0002] In hand tools such as scissors and pliers, the stability of the hinge connection directly affects the tool's accuracy and lifespan.

[0003] However, in the existing technology, the existing bolts are fastened by thread self-locking. But when the tool is frequently opened and closed (such as the reciprocating rotation when shearing), subjected to alternating shearing force or vibration, the thread pair is prone to loosening due to friction wear and preload decay, which leads to misalignment of the tool edge or jaws, affecting the shearing / clamping accuracy, and even causing problems such as "biting" or "jamming". Utility Model Content

[0004] In view of the above-mentioned problems in the prior art, the main purpose of this utility model is to provide an anti-loosening bolt structure, which solves the problem that in the prior art, bolts are fastened by thread self-locking, but when the tool is frequently opened and closed (such as the reciprocating rotation when shearing), subjected to alternating shearing force or vibration, the thread pair is prone to loosening due to friction wear and preload decay, resulting in misalignment of the tool edge or jaws, affecting the shearing / clamping accuracy, and even causing problems such as "biting" or "jamming".

[0005] The technical solution of this utility model is as follows: an anti-loosening bolt structure includes a connecting shaft, a bolt post, and an anti-loosening washer. The top of the anti-loosening washer is provided with a groove, and a locking ring is fixedly connected to the bottom of the anti-loosening washer. The anti-loosening washer is located on the outside of the bolt post. The top of the connecting shaft is provided with a threaded groove, which is threadedly connected to the bolt post. The locking ring is in contact with the connecting shaft.

[0006] Through the above technical solution, the blade body is subjected to alternating shearing force and leverage force when the scissors are cutting. The anti-loosening pad and locking ring can effectively counteract the loosening tendency caused by vibration, ensure the stability of the blade body hinge, and keep the blade edge accurately aligned, thereby improving the cutting accuracy. The groove further enhances the anti-loosening effect, and even with long-term high-frequency opening and closing, the connection can still remain tight, reducing problems such as "biting" and "uneven blade edge". In addition, the anti-loosening pad can be replaced separately, reducing tool maintenance costs.

[0007] In a preferred embodiment, a nut is fixedly connected to the top of the bolt post, and two slots are provided on the outer side of the nut. The anti-loosening washer is polygonal and serrated.

[0008] Through the above technical solutions, the groove design of the nut makes the operation more efficient and eliminates the need for special tools; the two symmetrically distributed grooves make the torque application more uniform, avoid the nut's uneven load deformation, ensure the coaxiality of the bolt column and the connecting shaft, make the blade rotate more smoothly when the scissors open and close, and reduce friction and jamming at the hinge; compared with a smooth nut without grooves, the grooves can more accurately control the preload, making the opening and closing feel of different batches of scissors more consistent.

[0009] In a preferred embodiment, two locking grooves are provided on the outer side of the top of the connecting shaft, and a cap is fixedly connected to the bottom of the connecting shaft.

[0010] Through the above technical solutions, the circumferential locking of the locking groove and locking ring can prevent relative rotation between the connecting shaft and the bolt column, avoid loosening caused by thread wear, and ensure that the blade edge remains precisely aligned after long-term use of the scissors; the cap increases the contact area and reduces the pressure at the hinge hole of the blade body, especially for blade bodies made of thin steel plates, aluminum alloys, etc., which can effectively prevent deformation of the hole wall and extend the overall service life of the scissors. The cap can cover the gap of the hinge hole, reduce the entry of cutting debris and dust, keep the hinge clean, and make the opening and closing of the scissors smoother.

[0011] In a preferred embodiment, the slots are symmetrically distributed on the outside of the nut, and the outer diameter of the nut is used in conjunction with the inner diameter of the groove.

[0012] Through the above technical solution, the scissors will vibrate slightly during cutting, the symmetrical grooves ensure uniform torque application, improve the connection reliability between the nut and the bolt post, and reduce thread wear; the fit between the nut and the groove further enhances the anti-loosening performance through radial limiting, and the groove's wrapping around the nut can prevent external impacts from damaging the nut, thus improving the tool's durability.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] In this invention, the scissors withstand alternating shearing force and leverage force during cutting. The anti-loosening washer, which is polygonal or serrated, and the locking ring can effectively counteract the loosening tendency caused by vibration. The polygonal anti-loosening washer increases frictional resistance through multi-sided contact, while the serrated anti-loosening washer strengthens the connection through serrated interlocking. Both ensure the hinge stability of the scissors, keeping the blade edge precisely aligned and improving cutting accuracy. The groove further enhances the anti-loosening effect, maintaining a tight connection even with long-term high-frequency opening and closing, reducing problems such as "biting" and "uneven blade edges." The anti-loosening washer can be replaced individually, reducing tool maintenance costs. The nut's slot design makes operation more efficient, requiring no special tools. Two symmetrically distributed slots ensure more even torque application, preventing nut deformation due to uneven load, ensuring the coaxiality of the bolt column and the connecting shaft, making the scissors rotate more smoothly when opening and closing, and reducing friction and jamming at the hinge. Compared to a smooth nut without slots, the slots can more precisely control the preload, resulting in better consistency in the opening and closing feel of different batches of scissors.

[0015] The circumferential locking of the locking groove and locking ring prevents relative rotation between the connecting shaft and the bolt post, avoiding loosening caused by thread wear and ensuring that the blade edge remains precisely aligned even after long-term use. The cap increases the contact area and reduces the pressure at the hinge hole of the blade body. Especially for blade bodies made of thin steel plates, aluminum alloys, etc., it can effectively prevent hole wall deformation and extend the overall service life of the scissors. The cap can cover the gap of the hinge hole, reducing the entry of cutting debris and dust, keeping the hinge clean, and making the opening and closing of the scissors smoother. The scissors vibrate slightly when cutting. The symmetrical groove ensures uniform torque application, improves the connection reliability of the nut and bolt post, and reduces thread wear. The fit between the nut and the groove further enhances the anti-loosening performance through radial limiting. The groove's wrapping around the nut prevents external impacts from damaging the nut, improving tool durability. The groove can also be fitted with polygonal or serrated anti-loosening washers to further optimize the anti-loosening effect. Attached Figure Description

[0016] Figure 1 This utility model provides a three-dimensional structural diagram of an anti-loosening bolt structure;

[0017] Figure 2 This utility model provides a front view structural schematic diagram of an anti-loosening bolt structure;

[0018] Figure 3 This is a bottom view schematic diagram of an anti-loosening bolt structure provided by this utility model.

[0019] Legend: 1. Connecting shaft; 2. Threaded groove; 3. Bolt post; 4. Nut; 5. Slot; 6. Anti-loosening washer; 7. Groove; 8. Locking ring; 9. Locking groove; 10. Cap. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Example

[0022] like Figure 1 , Figure 2 , Figure 3 As shown, this utility model provides a technical solution: including a connecting shaft 1, a bolt post 3 and an anti-detachment washer 6. The top of the anti-detachment washer 6 is provided with a groove 7, and the bottom of the anti-detachment washer 6 is fixedly connected with a locking ring 8. The anti-detachment washer 6 is located on the outside of the bolt post 3. The top of the connecting shaft 1 is provided with a threaded groove 2, which is threadedly connected to the bolt post 3. The locking ring 8 is in contact with the connecting shaft 1.

[0023] In this embodiment, at the hinge position of the two blades of the scissors, the connecting shaft 1 passes through the hinge hole of the blade, and the bolt post 3 engages with the connecting shaft 1 through the top threaded groove 2, thus achieving basic fastening of the blade hinge; the anti-loosening washer 6 is sleeved on the outside of the bolt post 3, and its bottom locking ring 8 is in close contact with the outer wall of the connecting shaft 1. When the scissors are frequently opened and closed, the friction and contact limit between the locking ring 8 and the connecting shaft 1 inhibit the rotation and loosening of the bolt post 3 caused by vibration; the groove 7 at the top of the anti-loosening washer 6 accommodates part of the nut 4 structure, constraining the bolt post 3 from both axial and radial directions, so that a stable connection system of "threaded engagement + mechanical limit" is formed at the hinge of the scissors.

[0024] like Figure 1 , Figure 2 , Figure 3 As shown, a nut 4 is fixedly connected to the top of the bolt column 3. Two slots 5 are opened on the outside of the nut 4, and the anti-loosening washer 6 is polygonal serrated.

[0025] In this embodiment, the nut 4 at the top of the bolt post 3 serves as the force-applying component at the hinge of the scissors. By using a wrench or other tools to engage with the two slots 5 on the outside of the nut 4, torque is applied to drive the bolt post 3 to tighten in the threaded groove 2, so that the scissor blades achieve a pre-tightened state of "flexible hinge without looseness".

[0026] like Figure 1 , Figure 2 , Figure 3 As shown, two locking grooves 9 are provided on the outer side of the top of the connecting shaft 1, and a cap 10 is fixedly connected to the bottom of the connecting shaft 1.

[0027] In this embodiment, the two locking grooves 9 on the outer side of the top of the connecting shaft 1 can cooperate with the locking ring 8 of the anti-detachment pad 6 after the scissors are fully assembled to form a circumferential limit, preventing the connecting shaft 1 from rotating relative to the bolt column 3; the cap 10 at the bottom of the connecting shaft 1 has a larger diameter than the main body of the connecting shaft 1 and fits tightly against the outer surface of the hinge hole of the scissor body, distributing the axial force to a larger area.

[0028] like Figure 1 , Figure 2 , Figure 3 As shown, the slots 5 are symmetrically distributed on the outside of the nut 4, and the outer diameter of the nut 4 is used in conjunction with the inner diameter of the groove 7.

[0029] In this embodiment, the symmetrically distributed grooves 5 on the outer side of the nut 4 ensure that the nut 4 is subjected to balanced force when the tool applies torque, thus preventing the bolt post 3 from bending. The outer diameter of the nut 4 and the inner diameter of the groove 7 at the top of the anti-loosening washer 6 adopt a transition fit. When the bolt post 3 is locked, the bottom of the nut 4 is embedded in the groove 7, and the inner wall of the groove 7 forms a radial constraint on the nut 4, limiting its lateral displacement caused by the vibration of the shears.

[0030] Working principle:

[0031] like Figure 1 , Figure 2 , Figure 3 As shown, at the hinge position of the two blades of the scissors, the connecting shaft 1 passes through the hinge hole of the blade, and the bolt post 3 engages with the connecting shaft 1 through the top threaded groove 2, thus achieving a basic fastening of the blade hinge. The anti-detachment washer 6 (polygonal or serrated) is sleeved on the outside of the bolt post 3, and its bottom locking ring 8 is in close contact with the outer wall of the connecting shaft 1. The polygonal anti-detachment washer enhances the frictional resistance through multi-sided contact, and the serrated anti-detachment washer strengthens the connection with the locking ring 8 through serrated engagement. When the scissors are frequently opened and closed, the bolt post is effectively prevented from detaching. 3. Loosening due to vibration; The groove 7 at the top of the anti-loosening washer 6 accommodates part of the nut 4 structure, constraining the bolt column 3 from both axial and radial directions, so that the scissor hinge forms a stable connection system of "threaded engagement + mechanical limit". The nut 4 at the top of the bolt column 3 serves as the force-applying component at the scissor hinge. By using tools such as wrenches to engage with the two slots 5 on the outside of the nut 4, torque is applied to drive the bolt column 3 to tighten in the threaded groove 2, so that the scissor blades achieve a pre-tightened state of "flexible hinge and no loosening".

[0032] The two locking grooves 9 on the top outer side of the connecting shaft 1 can cooperate with the locking ring 8 of the anti-loosening washer 6 after the scissors are fully assembled to form a circumferential limit, preventing the connecting shaft 1 from rotating relative to the bolt post 3. The cap 10 at the bottom of the connecting shaft 1 has a larger diameter than the main body of the connecting shaft 1 and fits tightly with the outer surface of the hinge hole of the scissor body, distributing the axial force to a larger area. The symmetrically distributed grooves 5 on the outer side of the nut 4 balance the force on the nut 4 when the tool applies torque, preventing the bolt post 3 from bending. The outer diameter of the nut 4 and the inner diameter of the groove 7 at the top of the anti-loosening washer 6 (polygonal or serrated) are transitionally fitted. When the bolt post 3 is locked, the bottom of the nut 4 is embedded in the groove 7. The inner wall of the groove 7 forms a radial constraint on the nut 4, limiting its lateral displacement caused by the vibration of the scissors. The groove 7 is adapted to the special contour of the anti-loosening washer 6, further optimizing the anti-loosening performance.

[0033] Finally, it should be noted that the above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A locking bolt structure comprising a connecting shaft (1), a bolt shank (3) and a locking washer (6), characterized in that: The top of the anti-detachment pad (6) is provided with a groove (7), and the bottom of the anti-detachment pad (6) is fixedly connected with a locking ring (8). The anti-detachment pad (6) is located on the outside of the bolt post (3). The top of the connecting shaft (1) is provided with a threaded groove (2). The threaded groove (2) is threadedly connected to the bolt post (3). The locking ring (8) is in contact with the connecting shaft (1).

2. The anti-loosening bolt structure according to claim 1, characterized by: The top of the bolt column (3) is fixedly connected to a nut (4), and two slots (5) are opened on the outside of the nut (4). The anti-loosening washer (6) is polygonal sawtooth shape.

3. The anti-loosening bolt structure according to claim 1, characterized by: Two locking grooves (9) are provided on the outer side of the top of the connecting shaft (1), and a cap (10) is fixedly connected to the bottom of the connecting shaft (1).

4. The anti-loosening bolt structure according to claim 2, characterized by: The slots (5) are symmetrically distributed on the outside of the nut (4), and the outer diameter of the nut (4) is used in conjunction with the inner diameter of the groove (7).

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