CN204082860U - A kind of double nuts structure with locking functions - Google Patents

Abstract

The utility model discloses a double-nut structure with anti-loosening function, which comprises a locking nut, a bearing nut and a spring washer. The centers of the locking nut and the bearing nut are respectively provided with threaded holes, and the center of the top of the bearing nut is provided with a cylindrical Bump, the center of the cylindrical bump is provided with a threaded hole, the threaded hole of the cylindrical bump is the same as the threaded hole of the bearing nut, the circumference of the outer surface of the cylindrical bump is provided with external threads, and the bottom of the lock nut is provided with a The groove that matches the cylindrical bump of the bearing nut, the groove at the bottom of the lock nut is provided with internal threads, the position of the threaded hole of the lock nut corresponds to the position of the threaded hole of the load nut, and the center of the threaded hole of the lock nut The center of the groove at its bottom is the same, and a spring washer is arranged between the load nut and the lock nut. The utility model is suitable for equipment with vibration, relatively large changes in load direction and size, and the connection of two workpieces, and is especially suitable for occasions where the interval between bolts is not strictly limited.

Description

A double nut structure with anti-loosening function

technical field

The utility model relates to a nut fastening structure, in particular to a double-nut structure with an anti-loosening function. the

Background technique

In people's production and life, bolts and nuts are widely used as connectors. But for the occasions where there is vibration, load direction and size change greatly, the anti-loosening effect of the single double nut structure and the nut plus spring washer structure is greatly reduced. Over time, the nuts will loosen, especially for some important equipment and important workpieces. Once the nuts are loosened, the workpieces will be separated, or a large safety accident will be caused due to the loose connection. Therefore, in special occasions, the protection between nuts and bolts is improved. The pine effect is particularly important. the

Utility model content

Aiming at the technical problems mentioned above, the utility model provides a double-nut structure with anti-loosening function, and proposes a technical innovation to the structure of the nut, which can effectively prevent the nut from loosening. the

The technical scheme of the utility model is:

A double-nut structure with an anti-loosening function, including a lock nut, a load nut, and a spring washer. The centers of the lock nut and the load nut are respectively provided with threaded holes, and it is characterized in that: the center of the top of the load nut is provided with A cylindrical protrusion, the center of the cylindrical protrusion is provided with a threaded hole, the threaded hole of the cylindrical protrusion is the same as the threaded hole of the bearing nut, and the circumference of the outer surface of the cylindrical protrusion There is an external thread, the bottom of the lock nut is provided with a groove that matches the cylindrical protrusion of the bearing nut, the groove at the bottom of the lock nut is provided with an internal thread, and the bottom of the lock nut is provided with an internal thread. The position of the threaded hole corresponds to the position of the threaded hole of the load nut. The center of the threaded hole of the lock nut is the same as the center of the groove at the bottom. A spring washer is arranged between the load nut and the lock nut. the

Further, the lock nut and the load nut have threads of two different sizes, the threaded holes of the lock nut and the load nut are matched with the bolts, and the outer thread of the boss of the load nut is matched with the lock nut. The grooved internal thread of the nut matches. the

Further, the two threads of the lock nut and the bearing nut adopt the same pitch, and the external dimensions of the lock nut and the bearing nut are selected from national standard sizes. the

The beneficial effects of the utility model:

When the double nut structure of the utility model is in use, after the double nuts equipped with spring washers are tightened with the bolts, the two nuts not only form a double nut anti-loosening structure with the bolts, but also the threads between the two nuts and the spring washers An anti-loosening structure is formed, so as to achieve the purpose of double anti-loosening. The utility model is suitable for equipment with vibration, relatively large changes in load direction and size, and the connection of two workpieces, and is especially suitable for occasions where the interval between bolts is not strictly limited. the

Description of drawings

Fig. 1 is the structural representation of the utility model. the

Fig. 2 is a schematic diagram of the structure of the locking nut of the present invention. the

Fig. 3 is a structural schematic diagram of the load bearing nut of the present invention. the

Fig. 4 is a schematic diagram of the structure of the spring washer of the present invention. the

Detailed ways

As shown in Figures 1-4, a double nut structure with anti-loosening function of the utility model includes a lock nut 1, a load nut 2, and a spring washer 3, and the centers of the lock nut 1 and the load nut 2 are respectively Threaded holes 11 and 22 are provided, and it is characterized in that: the center of the top of the bearing nut 2 is provided with a cylindrical protrusion 21, and the center of the cylindrical protrusion 21 is provided with a threaded hole, and the center of the cylindrical protrusion 21 The threaded hole is the same as the threaded hole 22 of the bearing nut 2, the circumference of the outer surface of the cylindrical protrusion 21 is provided with external threads, and the bottom of the locking nut 1 is provided with a cylindrical The groove 12 matched with the bump 21, the groove 12 at the bottom of the locking nut 1 is provided with an internal thread, the position of the threaded hole 11 of the locking nut 1 corresponds to the position of the threaded hole 22 of the bearing nut 2, The center of the threaded hole 11 of the lock nut 1 is the same as the center of the groove 12 at the bottom, and a spring washer 3 is provided between the bearing nut 2 and the lock nut 1 . the

Further, the lock nut 1 and the bearing nut 2 have threads of two different sizes, the threads of the threaded holes 11 and 22 of the lock nut 1 and the bearing nut 2 are matched with bolts, and the bearing nut 2 The external thread of the boss 21 matches the internal thread of the groove 12 of the locking nut 1 . the

Further, the two threads of the lock nut 1 and the bearing nut 2 adopt the same pitch, and the external dimensions of the lock nut 1 and the bearing nut 2 are selected from national standard sizes. the

When the utility model is assembled, the spring washer 3 is put into the lock nut 1 first, the two nuts are screwed together for one to two turns, and the bolt is screwed in. After the load nut 2 and the bolt are tightened, the lock nut 1 Tighten simultaneously with bearing nut 2 and bolt. The main function of the bearing nut 2 is to carry the load, and the main function of the lock nut 1 and the spring washer 3 is to prevent loosening. the

Claims (3)

1. one kind has the double nuts structure of locking functions, comprise locking nut, bearing screwed cap, compression spring, described locking nut and bearing screwed cap center are respectively equipped with tapped hole, it is characterized in that: described bearing screwed cap top center is provided with a cylindrical bump, the center of described cylindrical bump is provided with tapped hole, the tapped hole of described cylindrical bump is identical with the tapped hole of described bearing screwed cap, the circumference of the outer surface of described cylindrical bump is provided with outside thread, a groove matched with the cylindrical bump of described bearing screwed cap is provided with bottom described locking nut, groove bottom described locking nut is provided with internal thread, the tapped hole position of described locking nut is corresponding with the tapped hole position of bearing screwed cap, the tapped hole center of circle of described locking nut is identical with the center of circle of its bottom groove, compression spring is provided with between described bearing screwed cap and locking nut.

2. a kind of double nuts structure with locking functions according to claim 1, it is characterized in that: described locking nut and bearing screwed cap have the screw thread of two kinds of different sizes, the tapped hole screw thread of described locking nut and bearing screwed cap matches with bolt, and the boss outside thread of described bearing screwed cap matches with the groove internal thread of described locking nut.

3. a kind of double nuts structure with locking functions according to claim 1, is characterized in that: two kinds of screw threads of described locking nut and bearing screwed cap adopt identical pitch, and the boundary dimension of described locking nut and bearing screwed cap selects state's dimensioning.