Durable fastener

Abstract

The durable fastener comprises a bolt and a limiting assembly, the bolt comprises a head and a threaded rod, a containing cavity is formed in the end, away from the head, of the threaded rod, the inner wall of the containing cavity is magnetic, a plurality of grooves are formed in the inner wall of the containing cavity in the circumferential direction, and the grooves extend in the axial direction of the threaded rod. Each limiting assembly comprises a limiting head and an inserting rod matched with the corresponding containing cavity in an inserting mode, the outer diameter of each limiting head is larger than that of the corresponding screw rod, a plurality of clamping strips corresponding to the grooves in a one-to-one mode are arranged on the side wall of each inserting rod, and the clamping strips are matched with the grooves in shape and have magnetism. The magnetic block is arranged at the end of the inserting rod, when an automobile runs and encounters large vibration, circumferential rotation of the inserting rod is avoided, abrasion of the inserting rod and the screw rod is avoided, the inserting rod can be firmly attracted into the containing cavity through the multiple clamping strips and the magnetic block, the inserting rod is prevented from falling off, and therefore nut falling off is avoided, the durability is improved, and the service life of the nut is prolonged. And a plurality of clamping strips are arranged to be matched with the grooves.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a durable fastener. Background Art

[0002] Fasteners are a type of mechanical parts used for fastening and connection and are extremely widely used. Various fasteners can be seen on various machines, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, meters and supplies.

[0003] As a prior art, Chinese patent CN219062199U, automobile bolt fastener, in this technical solution, the adsorption part is only adsorbed in the accommodating cavity by a magnet, and the magnet is fixed to the bottom of the accommodating cavity by glue. When the car encounters a large vibration during driving, the positioning rod is not only prone to deflection and wear between the screw rod, but may also break away from the magnetic force and separate and fall off. Therefore, there is still a chance that the nut will fall off after deflection and displacement. Therefore, its durability after long-term use is not good, and there is still room for improvement. Utility Model Content

[0004] The utility model aims at providing a durable fastener to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a durable fastener, including a bolt and a limit assembly, the bolt including a head and a screw, the screw having a cavity at one end away from the head, the inner wall of the cavity having magnetism and a plurality of grooves arranged along the circumference, the grooves extending along the axial direction of the screw, the limit assembly including a limit head and a plug-in rod adapted to be plugged into the cavity, the outer diameter of the limit head being larger than the outer diameter of the screw, the side wall of the plug-in rod being provided with a plurality of clip-on strips arranged in one-to-one correspondence with the plurality of grooves, the clip-on strips being adapted to the shape of the grooves and having magnetism, and a magnetic block being provided at the end of the plug-in rod.

[0006] By adopting the above technical scheme, when connecting, the nut is put on the screw and tightened, and then the snap-in strips on the plug-in rod of the positioning assembly are aligned with the grooves one by one, and then the plug-in rod is inserted into the cavity. At this time, the magnetic block at the end of the plug-in rod is adsorbed with the head, and the snap-in strip is adsorbed with the inner wall of the cavity. By setting the snap-in strips and the grooves, the plug-in rod is limited circumferentially. When the car encounters a large vibration during driving, the circumferential rotation of the plug-in rod is avoided, and wear between the plug-in rod and the screw is avoided. Through multiple snap-in strips and magnetic blocks, the plug-in rod can be firmly adsorbed in the cavity to avoid the plug-in rod from falling off, thereby preventing the nut from falling off, thereby improving durability. In addition, the cooperation of multiple snap-in strips and grooves increases the overall strength and further improves durability.

[0007] As a further optimization of the utility model, a spring and an abutment ring are sleeved on the outer side of the plug-in rod, the inner diameter of the abutment ring is larger than the outer diameter of the screw rod and the outer diameter is larger than the outer diameter of the nut, the two ends of the spring are respectively connected to the limit head and the abutment ring, and an anti-slip portion is provided on the end of the abutment ring away from the spring.

[0008] By adopting the above technical solution, when the plug-in rod is inserted into the cavity, the abutment ring abuts against the nut, so that the spring is squeezed and deformed, so that the anti-slip part on the abutment ring can be tightly attached to the surface of the nut, increasing the friction between the two, thereby avoiding the deflection and displacement of the nut when the car encounters large vibrations while driving.

[0009] As a further optimization of the present invention, the anti-slip portion is made of rubber and has a plurality of raised particles on its surface.

[0010] As a further optimization of the utility model, the head is provided with a plurality of anti-slip grooves along the circumferential direction.

[0011] By adopting the above technical solution, an anti-skid groove is provided to increase the surface friction of the head, making it easier to manually rotate the rotating bolt, and making the operation more convenient.

[0012] As a further optimization of the utility model, the end surface of the head is provided with a cross groove.

[0013] The beneficial effects of the utility model are as follows: when connecting, the nut is put on the screw and tightened, then the snap-in strips on the plug-in rod of the positioning assembly are aligned with the grooves one by one, and then the plug-in rod is inserted into the cavity. At this time, the magnetic block at the end of the plug-in rod is adsorbed with the head, and the snap-in strip is adsorbed with the inner wall of the cavity. By setting the snap-in strips and the grooves, the plug-in rod is limited circumferentially. When the car encounters a large vibration during driving, the circumferential rotation of the plug-in rod is avoided, and wear between the plug-in rod and the screw is avoided. Through multiple snap-in strips and magnetic blocks, the plug-in rod can be firmly adsorbed in the cavity, and the plug-in rod is prevented from falling off, thereby preventing the nut from falling off, thereby improving durability. In addition, multiple snap-in strips are provided to cooperate with the grooves to increase the overall strength and further improve durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The structure of the bolt in the utility model is shown in FIG. Figure 1 ;

[0015] Figure 2 The structure of the bolt in the utility model is shown in FIG. Figure 2 ;

[0016] Figure 3 It is a structural schematic diagram of the limit assembly of the utility model;

[0017] Figure 4 It is a cross-sectional structural schematic diagram of the utility model.

[0018] The meanings of the numbers in the figure are as follows: 11, screw rod; 111, cavity; 1111, groove; 12, head; 121, anti-slip groove; 21, limit head; 22, plug-in rod; 221, snap-in strip; 23, magnetic block; 3, spring; 4, abutment ring; 41, anti-slip portion. DETAILED DESCRIPTION

[0019] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0020] See attached Figure 1-4 , the embodiment disclosed by the utility model is further provided with: a durable fastener, including a bolt and a limit assembly, the bolt including a head 12 and a screw rod 11, a cavity 111 is provided at one end of the screw rod 11 away from the head 12, the inner wall of the cavity 111 is magnetic and a plurality of grooves 1111 are provided along the circumferential direction, the grooves 1111 are extended along the axial direction of the screw rod 11, the limit assembly includes a limit head 21 and a plug-in rod 22 plugged and matched with the cavity 111, the outer diameter of the limit head 21 is larger than the outer diameter of the screw rod 11, the side wall of the plug-in rod 22 is provided with a plurality of clamping strips 221 corresponding to the plurality of grooves 1111, the clamping strips 221 are adapted to the shape of the grooves 1111 and are magnetic, and a magnetic block 23 is provided at the end of the plug-in rod 22;

[0021] The outer side of the plug rod 22 is sleeved with a spring 3 and an abutment ring 4. The inner diameter of the abutment ring 4 is larger than the outer diameter of the screw rod 11 and the outer diameter is larger than the outer diameter of the nut. The two ends of the spring 3 are respectively connected to the limit head 21 and the abutment ring 4. The end of the abutment ring 4 away from the spring 3 is provided with an anti-slip portion 41. The anti-slip portion 41 is made of rubber and has a plurality of raised particles on the surface.

[0022] Furthermore, the head 12 is provided with a plurality of anti-slip grooves 121 along the circumferential direction;

[0023] Furthermore, a cross groove is provided on the end surface of the head 12 .

[0024] The principle of the utility model is as follows: when connecting, the nut is put on the screw rod 11 and tightened, and then the clamping strip 221 on the plug rod 22 of the positioning assembly is aligned with the groove 1111 one by one, and then the plug rod 22 is inserted into the cavity 111. At this time, the magnetic block 23 at the end of the plug rod 22 is adsorbed with the head 12, and the clamping strip 221 is adsorbed with the inner wall of the cavity 111. By setting the clamping strip 221 and the groove 1111, the plug rod 22 is circumferentially limited. When the car encounters a large vibration during driving, the plug rod 22 is prevented from circumferentially rotating, and the wear between the plug rod 22 and the screw rod 11 is prevented. Through multiple clamping strips 221 and magnetic blocks 23, the plug rod 22 can be firmly adsorbed in the cavity 111, and the plug rod 22 is prevented from falling off, thereby preventing the nut from falling off, thereby improving the durability. In addition, multiple clamping strips 221 are provided to cooperate with the groove 1111 to increase the overall strength and further improve the durability.

[0025] When the plug rod 22 is inserted into the cavity 111, the abutting ring 4 abuts against the nut, so that the spring 3 is squeezed and deformed, so that the anti-slip portion 41 on the abutting ring 4 can be closely attached to the surface of the nut, increasing the friction between the two, thereby avoiding the nut from deflecting and displacing when the car encounters a large vibration during driving;

[0026] The anti-slip groove 121 is provided to increase the surface friction of the head 12, making it easier to manually rotate the rotating bolt, and making the operation more convenient.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. A durable fastener, comprising a bolt and a stopper assembly, wherein the bolt comprises a head (12) and a screw rod (11), and a cavity (111) is formed at one end of the screw rod (11) away from the head (12), wherein: The inner wall of the cavity (111) is magnetic and is provided with a plurality of grooves (1111) along the circumferential direction; the grooves (1111) are extended along the axial direction of the screw rod (11); the limit assembly comprises a limit head (21) and a plug-in rod (22) plugged and matched with the cavity (111); the side wall of the plug-in rod (22) is provided with a plurality of clamping strips (221) arranged in a one-to-one correspondence with the plurality of grooves (1111); the clamping strips (221) are matched with the shape of the grooves (1111) and are magnetic; and a magnetic block (23) is provided at the end of the plug-in rod (22).

2. A durable fastener according to claim 1, characterized in that: A spring (3) and an abutment ring (4) are sleeved on the outer side of the plug rod (22); the inner diameter of the abutment ring (4) is greater than the outer diameter of the screw rod (11) and the outer diameter is greater than the outer diameter of the nut; the two ends of the spring (3) are respectively connected to the limit head (21) and the abutment ring (4); an anti-slip portion (41) is provided at one end of the abutment ring (4) away from the spring (3).

3. A durable fastener according to claim 2, characterized in that: The anti-slip portion (41) is made of rubber and has a plurality of raised particles on its surface.

4. A durable fastener according to claim 1, characterized in that: The head (12) is provided with a plurality of anti-slip grooves (121) along the circumferential direction.

5. A durable fastener according to claim 1, characterized in that: The end surface of the head (12) is provided with a cross groove.

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