Nut assembly capable of never loosening

Abstract

The utility model provides a never-loose nut assembly which comprises a locking nut and a bearing nut, a deformation section is arranged at the lower end of the locking nut, a fixing section is arranged at the upper end of the bearing nut, a circle of stop groove is formed in the inner wall of the fixing section, and the deformation section can be inserted into the fixing section. The wedge-shaped gasket, the bearing nut and the locking nut can be independently machined, the structure is simpler, the production efficiency is higher, the purchase and use cost is lower, the deformation area of the locking nut deforms under the action of the wedge-shaped gasket, axial force is formed between the locking nut and the bearing nut, the locking nut is prevented from being separated from the bearing nut, and the service life of the locking nut is prolonged. And the locking performance is excellent.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical connection structures, and in particular relates to a nut assembly that never loosens. Background Art

[0002] Nuts and bolts are commonly used mechanical connection mechanisms in the field of mechanical fastening connections. However, since conventional nut and bolt combinations often rotate and loosen due to mechanical vibration and other factors during use, anti-loosening nuts are usually used in conjunction with bolts to prevent this from happening. Conventional anti-loosening nuts are composed of two nuts of the same specification. By squeezing the two nuts against each other, the thread friction between the nut and the bolt is increased, preventing the nut from rotating. However, in actual use, this structure is affected by factors such as raw materials, machining, sealing, surface finish, heat treatment, and surface treatment. There is a risk of loosening due to failure of the loosening torque. It has a certain life cycle and needs to be replaced after a certain period of use. The cost of the product increases with the number of repairs. Some new anti-loosening nuts currently exist. By modifying the nut structure and adding retaining washers, etc., the locking ability of the nut is improved. However, the processing method and structure are relatively complex, increasing the processing and use costs. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a never-loosening assembly, which includes a retaining groove on the bearing nut and a deformation section on the locking nut, and prevents the locking nut from axial movement through the cooperation of the deformation section and the retaining groove.

[0004] A nut assembly that never loosens consists of a locking nut and a load-bearing nut. A deformation section is provided at the lower end of the locking nut, and a fixed section corresponds to the upper end of the load-bearing nut. A circle of retaining grooves is provided on the inner wall of the fixed section. The deformation section can be inserted into the fixed section. The deformation section can be deformed by the mutual squeezing between the locking nut and the load-bearing nut. The deformed deformation section is stuck in the retaining groove, thereby axially fixing the position of the locking nut and the load-bearing nut.

[0005] In order to facilitate processing and provide a better fixing effect, the shapes of the deformation section and the fixing section are set to be cylindrical.

[0006] In order to make the lock nut and the load-bearing nut fit more tightly, the outer diameter of the deformation section is set to the same as the inner diameter of the fixed section, so that the positional relationship between the lock nut and the load-bearing nut can be more closely when combined.

[0007] In order to control the deformation direction of the deformation section of the locking nut and allow the deformation section to be more accurately inserted into the retaining groove, a wedge-shaped washer is installed in the fixed section of the load-bearing nut. The outer wall diameter of the wedge-shaped washer gradually increases from top to bottom to form a sloped outer surface. At the same time, the outer diameter of the top of the wedge-shaped washer is smaller than the inner diameter of the deformation section. When the deformation section is squeezed on the wedge-shaped washer, it expands outward under the pressure of the sloped outer surface, thereby being inserted into the retaining groove.

[0008] During the processing, in order to allow the wedge washer, load-bearing nut and lock nut to be processed separately, the outer diameter of the bottom end of the wedge washer is smaller than the inner diameter of the top end of the fixed section, so that the wedge washer can be placed into the fixed section from the top of the load-bearing nut.

[0009] In order to allow the deformable segment to be squeezed and deformed after being inserted into the fixed segment, the length of the deformable segment is set to be greater than that of the fixed segment.

[0010] The wedge-shaped washer, the load-bearing nut and the locking nut of the utility model can all be processed separately, with a simpler structure, higher production efficiency, and lower procurement and use costs. Under the action of the wedge-shaped washer, the deformation zone of the locking nut is deformed, and an axial force is formed between the locking nut and the load-bearing nut, thereby preventing the locking nut from separating from the load-bearing nut, and having excellent locking performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be described in further detail below with reference to the accompanying drawings.

[0012] Figure 1 It is a cross-sectional structural diagram of the utility model in use;

[0013] Figure 2 Schematic diagram of the cross-sectional structure of the locking nut;

[0014] Figure 3 It is a schematic diagram of the cross-sectional structure of the load-bearing nut;

[0015] Figure 4 Schematic diagram of the cross-sectional structure of a wedge washer;

[0016] Figure 5 It is a cross-sectional structural diagram of the assembled state of the load-bearing nut and the wedge washer;

[0017] As shown in the figure: 1-locking nut; 2-load-bearing nut; 3-deformation section; 4-fixing section; 5-stop groove; 6-wedge washer. DETAILED DESCRIPTION

[0018] To further illustrate the concept of the present invention, the following will further describe the specific implementation of the present invention with reference to the accompanying drawings: Example 1

[0019] A nut assembly that never loosens includes a locking nut 1 and a load-bearing nut 2. The locking nut 1 is made of an ordinary nut. The lower half of the ordinary nut is rotary cut to thin the outer wall of the lower half from the outer net to form a deformed section 3. Figure 2 As shown. The load-bearing nut 2 is made of an ordinary nut. A hole is drilled downward from the upper end surface of the ordinary nut to form a fixed section 4. The drilling depth is less than the length of the deformation section 3. The diameter of the drilled hole is consistent with the outer diameter of the deformation section 3. Then, a circle of retaining grooves 5 are milled on the inner wall of the fixed section 4. Figure 3 shown.

[0020] When fixing, first tighten the load-bearing nut 2 on the bolt to clamp the parts to be tightened, with the fixed section 4 facing outward, and then put the deformed section 3 of the locking nut 1 on the bolt with the inner side facing inward and tighten it. During the tightening process, the deformed section 3 is inserted into the fixed section 4. Since the depth of the fixed section 4 is less than the length of the deformed section 3, as the locking nut 1 is continuously tightened, the deformed section 3 is squeezed in the length direction and deformed to the side, and the deformed part is stuck in the retaining groove 5, thereby fixing the axial position of the locking nut 1 and the load-bearing nut 2. Example 2

[0021] A nut assembly that never loosens includes a locking nut 1, a load-bearing nut 2, and a wedge-shaped washer 6. The locking nut 1 is made of an ordinary nut. The lower half of the ordinary nut is subjected to rotational cutting, and the outer wall of the lower half is thinned from the outer mesh to form a deformation section 3. The load-bearing nut 2 is made of an ordinary nut. A fixed section 4 is formed by drilling downward from the upper end surface of the ordinary nut. The drilling depth is less than the length of the deformation section 3, and the diameter of the drilled hole is consistent with the outer diameter of the deformation section 3. Then, a circle of retaining grooves 5 is milled on the inner wall of the fixed section 4. The wedge-shaped washer 6 is processed using a metal sheet with a thickness less than the width of the retaining groove 5. The metal sheet is first cut into a disc with a diameter smaller than the hole at the top of the fixed section 4. Then, a hole is opened in the middle of the disc, and the hole diameter is directly consistent with the threaded part of the bolt. Then, the outer wall is cut, and the disc is cut into a shape with a diameter that gradually increases from top to bottom to obtain a wedge-shaped washer 6. Figure 4 shown.

[0022] When fixing, first tighten the bearing nut 2 on the bolt to clamp the parts to be fastened, so that the fixing section 4 faces outward, and then insert the wedge washer 6 from the bolt and put it into the fixing section 4, ensuring that the end with the larger diameter of the wedge washer 6 faces inward, such as Figure 5 As shown, finally, the deformed section 3 of the lock nut 1 is placed inwardly on the bolt and tightened. During the tightening process, the deformed section 3 is inserted into the fixed section 4. The deformed section 3 first contacts the wedge-shaped washer 6. Since the outer wall of the wedge-shaped washer 6 is sloped, the end of the deformed section 3 is deformed outward under the pressure of the slope, thereby being stuck in the retaining groove 5, fixing the axial position of the lock nut 1 and the load-bearing nut 2, as shown in FIG. Figure 1 shown.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various changes and variations are possible. Any modifications, equivalent replacements, improvements, etc. made using the present invention should be included in the scope of protection of the present invention.

Claims

1. A non-loosening nut assembly, comprising a locking nut (1) and a load-bearing nut (2), characterized in that: The lower end of the locking nut (1) is provided with a deformation section (3), the upper end of the load-bearing nut (2) is provided with a fixing section (4), the inner wall of the fixing section (4) is provided with a circle of retaining grooves (5), and the deformation section (3) can be inserted into the fixing section (4).

2. The non-loosening nut assembly according to claim 1, characterized in that: The deformation section (3) and the fixing section (4) are cylindrical in shape.

3. The non-loosening nut assembly according to claim 2, characterized in that: The outer diameter of the deformation section (3) is the same as the inner diameter of the fixing section (4).

4. The non-loosening nut assembly according to claim 3, characterized in that: It also includes a wedge-shaped washer (6), the outer wall diameter of which gradually increases from top to bottom, the wedge-shaped washer (6) is installed in the fixed section (4), and the outer diameter of the top end of the wedge-shaped washer (6) is smaller than the inner diameter of the deformation section (3).

5. The non-loosening nut assembly according to claim 4, characterized in that: The outer diameter of the bottom end of the wedge-shaped washer (6) is smaller than the inner diameter of the top end of the fixing section (4).

6. The non-loosening nut assembly according to claim 1, characterized in that: The length of the deformation section (3) is greater than the length of the fixing section (4).

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