Self-locking double nut

Abstract

The utility model relates to the technical field of nut fasteners, in particular to a self-locking double nut which comprises an upper nut and a lower nut, an inner screw groove is formed in one side, close to the lower nut, of the upper nut, a ring is installed on the inner side of the inner screw groove in a screwed mode, claw teeth used for self-locking are integrally constructed at one end, close to the lower nut, of the ring, and the claw teeth are in a plurality of groups. A conical groove matched with the claw teeth is formed in one surface, close to the upper nut, of the lower nut; when the double nuts are used for locking, the upper nut is firstly matched with the bolt and fastens an object, and when the lower nut is screwed with the bolt, the conical groove in the top of the lower nut can be conveniently matched with the multiple sets of claw teeth at the bottom of the upper nut, so that the multiple sets of claw teeth can be close to each other and tightened; therefore, certain self-locking performance is provided for the upper nut, and the double nuts can fasten objects more stably.

Description

Technical Field

[0001] The utility model relates to the technical field of nut fasteners, in particular to a self-locking double nut. Background Art

[0002] Among the interconnections of connectors, threaded connection is a very common and commonly used one. At present, the anti-loosening methods of threaded fastener connections are divided into three basic types: non-detachable anti-loosening, mechanical fastener anti-loosening and anti-loosening with increased friction. Non-detachable anti-loosening is a method of changing a detachable threaded connection into a non-detachable threaded connection by welding, bonding or punching riveting. Its disadvantage is that the threaded fastener cannot be reused; the anti-loosening of mechanical fasteners is to use mechanical fasteners to fix and pin the threaded parts and the connected parts or the threaded parts to prevent loosening. The disadvantage is that the weight of the fastened connection is increased, the manufacturing and installation are troublesome, and the motorized installation cannot be performed, so the cost is relatively high; the anti-loosening with increased friction uses the method of increasing the friction between the threads or the bolt (screw) head and the nut end face or increasing the friction of both at the same time to achieve the purpose of anti-loosening. This anti-loosening method is less reliable than the above-mentioned first two methods; but generally, the bolt is fastened with only one nut, and the nut will be loosened due to some external factors such as vibration during use, which greatly reduces the tightness of the nut. For this purpose, we propose a self-locking double nut. Utility Model Content

[0003] In view of the problems in the prior art, the utility model provides a self-locking double nut.

[0004] The technical solution adopted by the utility model to solve its technical problems is a self-locking double nut, comprising an upper nut and a lower nut, wherein an inner thread groove is provided on a side of the upper nut close to the lower nut, and a ring is threadedly installed on the inner side of the inner thread groove, and one end of the ring close to the lower nut is integrally constructed with claw teeth for self-locking, and there are multiple groups of claw teeth, and a conical groove matching the claw teeth is provided on a side of the lower nut close to the upper nut.

[0005] By adopting the above technical solution, when using double nuts for locking, the upper nut first cooperates with the bolt to tighten the object, and when the lower nut and the bolt are screwed together, the conical groove on the top of the lower nut is convenient for fitting with the multiple groups of claw teeth at the bottom of the upper nut, so that the multiple groups of claw teeth can approach each other and tighten, thereby providing a certain self-locking performance for the upper nut, so that the double nut can tighten the object more stably.

[0006] Specifically, a T-shaped ring groove is provided on the outer periphery of the lower nut, and a hexagonal ring is slidably mounted on the outer periphery of the T-shaped ring groove and is threadedly connected to the outer periphery of the upper nut.

[0007] By adopting the above technical solution, when the upper nut and the lower nut are brought into contact with each other, the hexagonal ring slidably installed on the surface of the T-shaped ring groove on the outer periphery of the lower nut can be moved, so that the hexagonal ring can move and be threadedly connected with the preset thread on the outer periphery of the upper nut, so that the upper nut and the lower nut can form a whole and have good self-locking performance, thereby effectively improving the tightness of the double nuts.

[0008] Specifically, the inner circumference of the hexagonal ring is integrally structured with an inner ring body that is slidably connected to the T-shaped ring groove.

[0009] By adopting the above technical solution, the inner ring body on the inner circumference of the hexagonal ring can slide and displace inside the T-shaped ring groove without separation, so that the hexagonal ring will not separate from the lower nut and can slide and rotate, so that the hexagonal ring can pull the lower nut so that it is tightly connected with the upper nut.

[0010] Specifically, an end of the upper nut away from the lower nut is integrally constructed with an outer ring buckle, and a spring washer is assembled inside the outer ring buckle.

[0011] By adopting the above technical solution, the outer ring buckle facilitates the support and convenience of the spring washer, so that the spring washer can operate stably and improve the tightening effect when the upper nut is tightened.

[0012] Specifically, silicone rings are bonded to opposite sides of the upper nut and the lower nut.

[0013] By adopting the above technical solution, the silicone ring has good elasticity, which is convenient for supporting the gap between the upper nut and the lower nut and providing certain protective performance, thereby reducing the situation where dust and debris penetrate into the gap between the two.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The technical solution of the present application adopts the design of the inner thread groove, the ring, the claw teeth and the tapered groove. When the double nut is used for locking, the upper nut first cooperates with the bolt to tighten the object, and when the lower nut and the bolt are screwed together, the tapered groove on the top of the lower nut is convenient to fit with the multiple groups of claw teeth at the bottom of the upper nut, so that the multiple groups of claw teeth can approach each other and tighten, thereby providing a certain self-locking performance for the upper nut, so that the double nut can tighten the object more stably.

[0016] 2. The technical solution of the present application adopts the design of the T-shaped ring groove and the hexagonal ring. When the upper nut and the lower nut are brought into contact with each other, the hexagonal ring slidably installed on the surface of the T-shaped ring groove on the outer periphery of the lower nut can be moved, so that the hexagonal ring can be moved and threadedly connected with the preset threads on the outer periphery of the upper nut, so that the upper nut and the lower nut can form a whole and have good self-locking performance, thereby effectively improving the tightness of the double nuts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is an axonometric drawing of the utility model;

[0019] Figure 2 It is an exploded view of the connection structure between the hexagonal ring and the lower nut of the utility model;

[0020] Figure 3 It is a cross-sectional schematic diagram of the connection structure between the upper nut and the lower nut of the utility model;

[0021] In the figure: 1. upper nut; 2. lower nut; 3. T-shaped ring groove; 4. hexagonal ring; 5. inner ring body; 6. inner thread groove; 7. ring; 8. claw teeth; 9. conical groove; 10. outer ring buckle; 11. spring washer; 12. silicone ring. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] See also Figure 1-3 The utility model embodiment provides a technical solution: a self-locking double nut, including an upper nut 1 and a lower nut 2, an inner thread groove 6 is provided on the side of the upper nut 1 close to the lower nut 2, and a ring 7 is threadedly installed on the inner side of the inner thread groove 6, and one end of the ring 7 close to the lower nut 2 is integrally constructed with claw teeth 8 for self-locking, and the claw teeth 8 have multiple groups, and a conical groove 9 matching the claw teeth 8 is provided on the side of the lower nut 2 close to the upper nut 1.

[0024] During use, when using the double nut for locking, the upper nut 1 first cooperates with the bolt to tighten the object, and when the lower nut 2 and the bolt are screwed together, the conical groove 9 on the top is convenient for fitting with the multiple groups of claw teeth 8 at the bottom of the upper nut 1, so that the multiple groups of claw teeth 8 can approach each other and tighten, thereby providing a certain self-locking performance for the upper nut 1, so that the double nut can tighten the object more stably.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, a T-shaped ring groove 3 is provided on the outer periphery of the lower nut 2 , and a hexagonal ring 4 threadedly connected to the outer periphery of the upper nut 1 is slidably mounted on the outer periphery of the T-shaped ring groove 3 .

[0026] During use, when the upper nut 1 and the lower nut 2 are in contact with each other, the hexagonal ring 4 slidably installed on the surface of the T-shaped ring groove 3 on the outer periphery of the lower nut 2 can be moved, so that the hexagonal ring 4 can move and be threadedly connected with the preset thread on the outer periphery of the upper nut 1, so that the upper nut 1 and the lower nut 2 can form a whole and have good self-locking performance, thereby effectively improving the tightness of the double nuts.

[0027] like Figure 2 and Figure 3 As shown, the inner circumference of the hexagonal ring 4 is integrally formed with an inner ring body 5 which is slidably connected to the T-shaped ring groove 3 .

[0028] When in use, the inner ring body 5 on the inner circumference of the hexagonal ring 4 can slide and displace inside the T-shaped ring groove 3 without separation, so that the hexagonal ring 4 will not separate from the lower nut 2 and can slide and rotate, so that the hexagonal ring 4 can pull the lower nut 2 to make it tightly connected with the upper nut 1.

[0029] like Figure 1 and Figure 3 As shown, an end of the upper nut 1 away from the lower nut 2 is integrally constructed with an outer ring buckle 10 , and a spring washer 11 is assembled inside the outer ring buckle 10 .

[0030] When in use, the outer ring buckle 10 is convenient for supporting and facilitating the spring washer 11 , so that the spring washer 11 can operate stably and improve the tightening effect when the upper nut 1 is tightened.

[0031] like Figure 3 As shown, a silicone ring 12 is bonded to the opposite sides of the upper nut 1 and the lower nut 2 .

[0032] When in use, the silicone ring 12 has good elasticity, which facilitates supporting the gap between the upper nut 1 and the lower nut 2 and provides a certain degree of protection, thereby reducing the infiltration of dust and debris between the two.

[0033] The working principle and use process of the utility model are as follows: when in use, first install the corresponding structural components in the appropriate position, and when using the double nut for locking, the upper nut 1 first cooperates with the bolt to tighten the object, and when the lower nut 2 is screwed with the bolt, the conical groove 9 on its top is convenient to fit with the multiple groups of claw teeth 8 at the bottom of the upper nut 1, so that the multiple groups of claw teeth 8 can approach each other and be tightened, thereby providing a certain self-locking performance for the upper nut 1, so that the double nut can tighten the object more stably, and when the upper nut 1 and the lower nut 2 are close to each other and abut against each other, the hexagonal ring 4 slidably installed on the surface of the T-shaped ring groove 3 on the outer periphery of the lower nut 2 can be moved, so that the hexagonal ring 4 can move and be screwed together with the preset thread on the outer periphery of the upper nut 1, so that the upper nut 1 and the lower nut 2 can form a whole and have good self-locking performance, so that the tightness of the double nut is effectively improved.

[0034] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A self-locking double nut, characterized in that: The invention comprises an upper nut (1) and a lower nut (2); an inner screw groove (6) is provided on one side of the upper nut (1) close to the lower nut (2); a ring (7) is threadedly installed on the inner side of the inner screw groove (6); claw teeth (8) for self-locking are integrally constructed at one end of the ring (7) close to the lower nut (2); and the claw teeth (8) have a plurality of groups; a conical groove (9) matching with the claw teeth (8) is provided on one side of the lower nut (2) close to the upper nut (1).

2. A self-locking double nut according to claim 1, characterized in that: The outer periphery of the lower nut (2) is provided with a T-shaped ring groove (3), and the outer periphery of the T-shaped ring groove (3) is slidably mounted with a hexagonal ring (4) threadedly connected to the outer periphery of the upper nut (1).

3. A self-locking double nut according to claim 2, characterized in that: The inner circumference of the hexagonal ring (4) is integrally formed with an inner ring body (5) which is slidably connected to the T-shaped ring groove (3).

4. A self-locking double nut according to claim 1, characterized in that: An end of the upper nut (1) away from the lower nut (2) is integrally formed with an outer ring buckle (10), and a spring washer (11) is mounted inside the outer ring buckle (10).

5. A self-locking double nut according to claim 1, characterized in that: A silicone ring (12) is bonded to the opposite sides of the upper nut (1) and the lower nut (2).

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