Anti-loose bolt with spring reset mechanism and processing technology

Abstract

The application relates to the technical field of bolts, in particular to an anti-loosening bolt provided with a spring reset mechanism and a machining process, which comprises a screw rod and two nuts sleeved on the screw rod in a screwing mode, one end of the nut is embedded with a spring, after the two nuts are locked on the screw rod, the spring clamped on the top of one nut is elastically deformed between the nut and a workpiece, and the spring clamped on the top of the other nut is elastically deformed between the two nuts; the bottom end of the nut is embedded with a rubber clamping ring at an inner ring opening; beneficial effects are that the spring of one nut is clamped between the nut and the workpiece, the resilience is used to continuously press the workpiece, the spring of the other nut is clamped between the two nuts, secondary locking is formed, and loosening caused by vibration is effectively resisted.

Description

Technical Field

[0001] This invention relates to the field of bolts, specifically to an anti-loosening bolt with a spring reset mechanism and its processing technology. Background Technology

[0002] In the field of mechanical connections, loose or missing bolts are a common problem leading to equipment failure and safety accidents, especially under conditions of vibration, impact, or frequent opening and closing (such as in vehicles, industrial equipment, and building structures). Traditional bolts rely on friction to prevent loosening, but after long-term use, wear and vibration can cause a decrease in preload, leading to connection failure. Existing anti-loosening technologies include double nuts, spring washers, and chemical adhesives, but these have the following drawbacks: The screw and nut are pressed together to prevent loosening, but the torque needs to be precisely controlled and they may still loosen under long-term vibration; they rely on elastic deformation to provide friction, but they are prone to failure due to stress relaxation and cannot compensate for the small gap between the screw and nut; although they can achieve permanent fixation, disassembly is difficult and cannot meet maintenance needs.

[0003] Furthermore, existing spring return mechanisms are mostly used in single-nut structures, making it difficult to simultaneously address the bidirectional anti-loosening requirements between the workpiece and the nut. Additionally, the spring is prone to deformation and failure due to nut rotation, affecting the reliability of the anti-loosening mechanism. Therefore, there is an urgent need for a bolt structure that combines bidirectional anti-loosening, vibration resistance, and easy disassembly. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-loosening bolt with a spring reset mechanism and a processing technology thereon, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an anti-loosening bolt with a spring reset mechanism, comprising a screw rod and two nuts screwed onto the screw rod, wherein a spring is embedded at one end of each nut, and after the two nuts are locked on the screw rod, the spring at the top of one nut clamps between the nut and the workpiece and undergoes elastic deformation, and the spring at the top of the other nut clamps between the two nuts and undergoes elastic deformation; a rubber clamping ring is embedded in the inner ring at the bottom end of the nut.

[0006] Preferably, one end of the nut has an installation groove, which is an annular groove. One end of the spring is fixed in the installation groove, and the other end of the spring is fixed with a metal pad, which is an annular plate structure, and the outer diameter of the metal pad is equal to the diameter of the installation groove.

[0007] Preferably, a rubber pad is fixed to the surface of the metal pad, the rubber pad and the spring are symmetrically distributed about the metal pad, and limiting members are provided on both sides of the metal pad.

[0008] Preferably, the limiting component includes a limiting plate, which has an "L"-shaped plate structure. Both sides of the nut are provided with side grooves, which are also "L"-shaped grooves and connect to the mounting groove. The bottom end of the limiting plate is inserted into the side groove, and the top end of the limiting plate is fixed to the surface of the metal pad. When the spring is in its initial state and pops the metal pad out of the mounting groove, the bottom end of the limiting plate is still in the side groove.

[0009] Preferably, the bottom end of the nut has a reserved groove on the inner ring surface. The reserved groove is an annular groove. The outer ring surface of the rubber clamp is fixed to the surface of the reserved groove. The rubber clamp is held between the screw and the nut and undergoes elastic deformation.

[0010] A manufacturing process for an anti-loosening bolt equipped with a spring reset mechanism includes the following steps: A spring is pre-installed at one end of the nut, and the two spring-loaded nuts are screwed onto the screw rod. At this time, the spring between the two nuts is compressed and deformed, and the spring's rebound force makes the two nuts securely screwed onto the screw rod.

[0011] Preferably, a mounting groove is pre-made at one end of the nut for mounting the spring, and a metal pad is fixed at one end of the spring for uniformly compressing the spring, and the metal pad can be inserted into the mounting groove when the spring is compressed.

[0012] Preferably, a rubber gasket is installed on the surface of the metal pad.

[0013] Preferably, rubber pads are installed on both sides of the metal pad to limit the metal pad when the spring extends and retracts, thus preventing the metal pad from rotating.

[0014] Preferably, a pre-reserved groove is made at the bottom of the nut for installing a rubber clamping ring. After the rubber clamping ring is clamped between the screw and the nut, it improves the anti-loosening effect of the nut on the screw.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The anti-loosening bolt and its processing technology proposed in this invention, with a spring return mechanism, achieve a multi-layered anti-loosening effect through the coordinated design of double nuts and the spring return mechanism: One nut's spring is held between the nut and the workpiece, using its rebound force to continuously press the workpiece; the other nut's spring is held between the two nuts, forming a secondary locking mechanism that effectively resists loosening caused by vibration. By interlocking the “L”-shaped limiting plate with the side groove, the spring and metal pad rotate synchronously with the nut, avoiding spring failure due to torsional deformation and improving structural stability. The rubber clamp at the bottom of the nut elastically fills the tiny gap between the screw and the nut, which not only enhances the anti-loosening effect but also prevents corrosive media from entering and extends the service life. Both the spring reset mechanism and the rubber clamp are designed to be resilient, eliminating the need for chemical adhesives or destructive disassembly, thus meeting the requirements for regular equipment maintenance.

[0016] This structure comprehensively solves the problems of insufficient anti-loosening, gap leakage and maintenance difficulties of traditional bolts under vibration conditions, and significantly improves the reliability and safety of mechanical connections. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Sectional view of the structure at point AA; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 4 This is a schematic diagram of the connection structure between the nut and the metal washer of the present invention; Figure 5 This is a schematic diagram of the nut structure of the present invention; Figure 6 This is a schematic diagram of the connection structure between the metal pad and the limiting plate of the present invention.

[0018] In the diagram: screw 1, nut 2, mounting groove 201, side groove 202, reserved groove 203, metal pad 3, rubber gasket 301, spring 302, limit plate 303, rubber clamping ring 4. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit 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.

[0020] Example 1, please refer to Figures 1-6This invention provides a technical solution: an anti-loosening bolt with a spring reset mechanism, comprising a screw 1 and two nuts 2 screwed onto the screw 1. A spring 302 is embedded at one end of each nut 2. After the two nuts 2 are locked onto the screw 1, the spring 302 at the top of one nut 2 is held between the nut 2 and the workpiece, undergoing elastic deformation; the spring 302 at the top of the other nut 2 is held between the two nuts 2, undergoing elastic deformation. A rubber clamping ring 4 is embedded in the inner ring at the bottom end of the nut 2. A mounting groove 201 is formed at one end of the nut 2, and the mounting groove 201 is an annular groove. One end of the spring 302 is fixed in the mounting groove 201, and the other end of the spring 302 is fixed with a metal pad 3. The metal pad 3 has an annular plate structure, and its outer diameter is equal to the diameter of the mounting groove 201. A rubber gasket 301 is fixed to the surface of the metal pad 3, and the rubber gasket 301 and the spring 302 are symmetrically distributed about the metal pad 3.

[0021] When using bolts, first pass the screw rod 1 through the bolt hole on the surface of the workpiece, then screw the two nuts 2 onto the screw rod 1 in sequence and tighten them. When one nut 2 is tightened, the metal washer 3 on the top of the nut 2 and the spring 302 are squeezed into the mounting groove 201. The spring 302 rebounds and pushes the metal washer 3 tightly against one side of the workpiece, using the rebound force of the spring 302 to prevent the nut 2 from loosening or falling off. After the other nut 2 is tightened, the spring 302 is clamped between the two nuts 2 and rebounds.

[0022] To prevent the spring 302 from rotating when the nut 2 is screwed onto the screw 1, the following is proposed: Both sides of the metal pad 3 are provided with limiting components; the limiting components include a limiting plate 303, which has an "L" shaped plate structure. Both sides of the nut 2 are provided with side grooves 202, which have an "L" shaped groove and are connected to the mounting groove 201. The bottom end of the limiting plate 303 is inserted into the side groove 202, and the top end of the limiting plate 303 is fixed to the surface of the metal pad 3. When the spring 302 is in the initial state and pops the metal pad 3 out of the mounting groove 201, the bottom end of the limiting plate 303 is still in the side groove 202.

[0023] Since the limiting plate 303 is inserted into the side groove 202 to pull the metal pad 3, and the spring 302 is fixed between the metal pad 3 and the mounting groove 201, the metal pad 3 and the spring 302 rotate synchronously with the nut 2, and the spring 302 will not be twisted or deformed.

[0024] To further improve the anti-loosening effect of nut 2 on screw 1, the following is proposed: The bottom end of the nut 2 has a reserved groove 203 on the inner ring surface. The reserved groove 203 is an annular groove. The outer ring surface of the rubber clamp 4 is fixed to the surface of the reserved groove 203. The rubber clamp 4 is clamped between the screw 1 and the nut 2 and undergoes elastic deformation. After the rubber clamp 4 rebounds, it fills the gap between the screw 1 and the nut 2, so that the screw 1 and the nut 2 are firmly screwed together.

[0025] The following are detailed instructions for using anti-loosening bolts equipped with a spring return mechanism: Insert screw 1 vertically through the bolt hole on the workpiece surface, ensuring the head of screw 1 is flush against one side of the workpiece surface. Screw the first nut 2 into screw 1, with the bottom end of nut 2 (the end with the rubber clamp 4) facing the workpiece. Tighten nut 2 until it contacts the workpiece surface, continuing to apply force to compress the metal pad 3 and spring 302 into the mounting groove 201, ensuring the rubber pad 301 is flush against the workpiece. Confirm that the bottom end of the limiting plate 303 is inserted into the side groove 202, and that the limiting plate 303 remains connected to the side groove 202 while the spring 302 is compressed. Ensure that the spring 302's rebound force presses nut 2 firmly against the workpiece through the metal pad 3 and rubber pad 301, preventing loosening. Screw the second nut 2 into screw 1, with its bottom end facing the top of the first nut 2. Tighten the second nut 2 until it contacts the top of the first nut 2, compressing the spring 302 of this nut 2 between the two nuts 2. Confirm that the bottom end of the limiting plate 303 of the second nut 2 is inserted into the corresponding side groove 202 to prevent the spring 302 from rotating with the nut 2. Ensure that the rebound force of the spring 302 pushes the two nuts 2 to press against each other, forming a double-nut anti-loosening structure. After tightening the two nuts 2, the rubber clamp 4 undergoes elastic deformation due to the compression between the inner ring surface of the nut 2 and the screw 1. After rebounding, it fills the small gap between the screw 1 and the nut 2, further enhancing the anti-loosening effect. Slightly rotate the nut 2 in the opposite direction and observe whether the spring 302 pushes the nut 2 back to its original position through the metal pad 3 and the rubber washer 301, confirming that there is no sign of loosening. Visually inspect the contact point between the bottom end of the nut 2 and the screw 1, confirming that the rubber clamp 4 completely fills the gap and there are no visible gaps. Manually try to rotate the metal pad 3 to confirm that the limiting plate 303 is always stuck in the side groove 202 and the spring 302 does not rotate synchronously with the nut 2. When removing, use a tool to rotate the second nut 2 in the opposite direction, moving it away from the first nut 2, to release the pressure of the spring 302 between the two nuts 2. Rotate the first nut 2 in the reverse direction to gradually eject the spring 302 and metal washer 3 from the mounting slot 201 until the nut 2 detaches from the workpiece surface. Pull the screw 1 out of the bolt hole of the workpiece, clean the rubber clamp 4, spring 302 and other components of any residue, and prepare for the next use.

[0026] Example 2, based on Example 1, proposes a processing method for an anti-loosening bolt equipped with a spring reset mechanism, including the following steps: A spring 302 is pre-installed at one end of the nut 2, and the two nuts 2 with springs 302 are screwed onto the screw rod 1. At this time, the spring 302 between the two nuts 2 is compressed and deformed, and the rebound force of the spring 302 makes the two nuts 2 firmly screwed onto the screw rod 1.

[0027] A mounting groove 201 is pre-made at one end of the nut 2 for mounting the spring 302, and a metal pad 3 is fixed at one end of the spring 302 for uniformly compressing the spring 302. The metal pad 3 can be inserted into the mounting groove 201 when the spring 302 is compressed. A rubber pad 301 is installed on the surface of the metal pad 3. Rubber pads 301 are installed on both sides of the metal pad 3 to limit the metal pad 3 when the spring 302 moves, preventing the metal pad 3 from rotating. A reserved groove 203 is made at the bottom of the nut 2 for mounting a rubber clamping ring 4. After the rubber clamping ring 4 is clamped between the screw 1 and the nut 2, it improves the anti-loosening effect of the nut 2 on the screw 1.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A non-disengaged bolt with a spring reset mechanism, comprising a screw (1) and two nuts (2) screwed onto the screw (1), characterized in that: One end of the nut (2) is fitted with a spring (302). After the two nuts (2) are locked on the screw (1), the spring (302) on the top of one nut (2) is held between the nut (2) and the workpiece and undergoes elastic deformation. The spring (302) on the top of the other nut (2) is held between the two nuts (2) and undergoes elastic deformation. A rubber clamping ring (4) is fitted at the bottom of the nut (2) in the inner ring.

2. The anti-loosening bolt with a spring reset mechanism according to claim 1, characterized in that: The nut (2) has an installation groove (201) at one end. The installation groove (201) is an annular groove. One end of the spring (302) is fixed in the installation groove (201). The other end of the spring (302) is fixed with a metal pad (3). The metal pad (3) is an annular plate structure. The outer diameter of the metal pad (3) is equal to the diameter of the installation groove (201).

3. A non-disengaged bolt with a spring reset mechanism according to claim 2, characterized in that: A rubber pad (301) is fixed on the surface of the metal pad (3). The rubber pad (301) and the spring (302) are symmetrically distributed about the metal pad (3). Limiting elements are provided on both sides of the metal pad (3).

4. A non-disengaged bolt with a spring reset mechanism according to claim 3, characterized in that: The limiting component includes a limiting plate (303), which has an "L" shaped plate structure. Both sides of the nut (2) are provided with side grooves (202), which are "L" shaped grooves and are connected to the mounting groove (201). The bottom end of the limiting plate (303) is inserted into the side groove (202), and the top end of the limiting plate (303) is fixed to the surface of the metal pad (3). When the spring (302) is in the initial state and pops the metal pad (3) out of the mounting groove (201), the bottom end of the limiting plate (303) is still in the side groove (202).

5. A non-disengaged bolt with a spring reset mechanism according to claim 1, characterized in that: The bottom end of the nut (2) has a reserved groove (203) on the inner ring surface. The reserved groove (203) is an annular groove. The outer ring surface of the rubber clamp (4) is fixed on the surface of the reserved groove (203). The rubber clamp (4) is clamped between the screw (1) and the nut (2) and undergoes elastic deformation.

6. A processing method for an anti-loosening bolt equipped with a spring reset mechanism, applied to the processing of the anti-loosening bolt equipped with a spring reset mechanism as described in any one of claims 1-5, characterized in that: The processing technology includes the following steps: A spring (302) is pre-installed at one end of the nut (2), and the two nuts (2) with springs (302) are screwed onto the screw rod (1). At this time, the spring (302) between the two nuts (2) is compressed and deformed. The rebound force of the spring (302) makes the two nuts (2) firmly screwed onto the screw rod (1).

7. The processing technology of an anti-loosening bolt with a spring reset mechanism according to claim 6, characterized in that: A mounting groove (201) is pre-made at one end of the nut (2) for mounting the spring (302), and a metal pad (3) is fixed at one end of the spring (302) for uniformly compressing the spring (302), and the metal pad (3) can be inserted into the mounting groove (201) when the spring (302) is compressed.

8. The processing technology of an anti-loosening bolt with a spring reset mechanism according to claim 7, characterized in that: Rubber gaskets (301) are installed on the surface of the metal pad (3).

9. The processing technology of an anti-loosening bolt with a spring reset mechanism according to claim 8, characterized in that: Rubber pads (301) are installed on both sides of the metal pad (3) to limit the metal pad (3) when the spring (302) extends and retracts, so as to prevent the metal pad (3) from rotating.

10. The processing technology of an anti-loosening bolt with a spring reset mechanism according to claim 9, characterized in that: A pre-reserved groove (203) is opened at the bottom of the nut (2) for installing a rubber clamp (4). After the rubber clamp (4) is clamped between the screw (1) and the nut (2), the anti-loosening effect of the nut (2) on the screw (1) is improved.

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