Thread-variable nut

Abstract

The utility model discloses a variable thread type nut which comprises a nut body, an internal thread is arranged on the nut body, a containing groove is formed in the thread bottom of the internal thread, the side wall of the containing groove is in a circular arc shape, and the side wall of the containing groove is in smooth transition connection with the thread side wall of the internal thread. According to the structure, the containing groove is ingeniously designed to optimize material use, and machining of the nut is facilitated. The method needed by the structure is small in machining amount, and a working area of the nut can be accurately machined. And the main structure size and the mechanical strength of the nut are ensured to meet the use requirements, the service life of a mold can be remarkably prolonged, and the production cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to a nut. Background Art

[0002] In the field of mechanical engineering, especially in high-load applications, the design and manufacture of nuts are of vital importance. Traditional nut tooth profiles are usually designed with triangular or trapezoidal tooth profiles. However, in the modern industrial environment where the demand for high-efficiency and high-precision processing is increasing, these traditional tooth profiles have some design deficiencies. The current nut manufacturing process requires a large amount of metal to be removed during processing, which not only increases material costs, but also often causes mold wear and energy waste. For example, when processing traditional V-threads, the biggest difficulty lies in the forming of the sharp corners at the bottom of the thread. This part is particularly prone to burrs and slag during the processing process. However, in actual use, the bottom of the thread hardly bears any structural load-bearing role. Therefore, it is not economical to spend a lot of money to finely process the bottom of the thread.

[0003] In addition, the problem of residual material discharge in traditional design processing has not been effectively solved, which often leads to the accumulation of processing residual materials inside the mold, thereby increasing internal stress and affecting the surface quality and service life of the product. Patent document CN114952182A, although trying to improve processing deformation by modifying the thread design, the design failed to effectively consider the guidance and deformation factors of metal residual materials on the production line. These design deficiencies often lead to product consistency problems and excessive wear on the mold in actual applications, thereby significantly reducing the service life of the mold and increasing production costs. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a variable tooth type nut to improve product quality and the service life of the mold.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is a variable tooth type nut, including a nut body, an internal thread is provided on the nut body, a receiving groove is provided at the bottom of the internal thread, the side wall of the receiving groove is arc-shaped, and the side wall of the receiving groove is smoothly transitionally connected to the side wall of the internal thread.

[0006] In an embodiment of the present invention, the side wall of the receiving groove is formed by splicing a plurality of arc sections.

[0007] In one embodiment of the present invention, the cross-section of the receiving groove is in the shape of a water drop.

[0008] In an embodiment of the present invention, the receiving groove is symmetrical with respect to itself.

[0009] In an embodiment of the present invention, the depth of the receiving groove is 0.01-0.2 mm.

[0010] In one embodiment of the present invention, the projection length of the width of the accommodating groove on the axis of the nut is generally 1 / 16-1 / 6 of the thread pitch.

[0011] In one embodiment of the utility model, the top of the internal thread is provided with an arc-shaped transition shoulder. The arc-shaped transition shoulder is adopted to replace the traditional sharp corner with a rounded corner, which is easier to process and shape.

[0012] In one embodiment of the present invention, the arc-shaped transition shoulder is formed by splicing one or more arc segments.

[0013] In an embodiment of the present invention, the arc-shaped transition shoulder and the tooth side wall are smoothly transitionally connected.

[0014] In one embodiment of the present invention, the total length of the arc-shaped transition shoulder is approximately 1 / 16-1 / 6 of the nut lead.

[0015] This technical solution has the following beneficial effects:

[0016] The utility model attaches the receiving groove to the internal thread profile, that is, the receiving groove is opened at the bottom of the internal thread, so that the residual material during processing can flow into the receiving groove, avoiding stress concentration on the workpiece, and the receiving groove is also convenient for tool avoidance and residual material collection. In addition, the receiving groove part forms a lubrication unit with oil storage capacity after processing, thereby improving the lubrication performance of the workpiece.

[0017] The design of the receiving groove allows many unnecessary processing areas to be avoided during processing, so that the main dimensions of the product can be accurately controlled and the product quality is improved.

[0018] As the processing area becomes smaller, the design of the material trough also greatly reduces the extrusion of the workpiece on the mold, thereby significantly improving the life of the mold.

[0019] The utility model reduces the amount of material removal by improving the design of the thread profile, making the entire production process more environmentally friendly and economical, while also reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0021] Figure 2 It is a cross-sectional view of an embodiment of the utility model;

[0022] Figure 3 It is a partial enlarged view of an embodiment of the utility model;

[0023] Figure 4It is a schematic diagram of a nut thread profile of an embodiment of the utility model;

[0024] Figure 5 It is a partial enlarged view of the tooth profile in Example 2 of the utility model.

[0025] Description of the reference numerals: nut body 1, internal thread 2, receiving groove 3, inclined plane 4. DETAILED DESCRIPTION

[0026] The following is combined with the embodiments and attached Figures 1 to 5 The utility model is further described.

[0027] Example 1

[0028] A variable tooth type nut, such as Figure 1-3 As shown, it includes a nut body 1, on which an internal thread 2 is provided, and a receiving groove 3 is provided at the bottom of the thread of the internal thread, which is used to accommodate the residual material of the side wall of the processed internal thread groove. The side wall of the receiving groove is arc-shaped, and the receiving groove is symmetrical about itself. The shape of the side wall of the receiving groove is formed by splicing multiple arcs, and the size is determined according to the size design of the thread. In this embodiment, the cross-section of the receiving groove is teardrop-shaped. The depth of the receiving groove is 0.01-0.2mm, and the projection length of the width on the axis of the nut is usually 1 / 16-1 / 6 of the pitch, so as to facilitate tool avoidance and residual material collection.

[0029] In this embodiment, Figure 4 As shown, the tooth side wall of the internal thread is an inclined plane 4, and the side wall of the receiving groove is smoothly connected to the tooth side wall of the internal thread. The dotted line extension part represents the bottom of the traditional internal thread tooth profile, and the inclined plane 4 and the solid arc receiving groove 3 constitute the improved tooth profile. The improved tooth profile structure optimizes the use of materials by cleverly designing the receiving groove to facilitate the processing of the nut. This structure requires a small amount of processing and can accurately process the working area of ​​the nut. It not only ensures that the main structural dimensions and mechanical strength of the nut meet the use requirements, but also significantly improves the service life of the mold and effectively reduces the production cost.

[0030] Example 2

[0031] Different from Example 1, in this embodiment, Figure 5 As shown, the top of the internal thread is also provided with an arcuate transition shoulder 5, and the arcuate transition shoulder 5 is smoothly transitionally connected to the side wall 4. The arcuate transition shoulder 5 can be formed by splicing one or more arc segments. The total length of the arcuate transition shoulder 5 is about 1 / 16-1 / 6 of the nut lead.

[0032] The main part of the thread contact that really works is the mid-diameter section of the thread. Therefore, the structure of the arc-shaped transition shoulder avoids unnecessary processing areas, reduces processing volume, improves processing efficiency, and increases tool life. In addition, the arc-shaped transition shoulder and the receiving groove allow the stress and deformation generated when processing the mid-diameter section of the thread to be released symmetrically to the top and bottom of the thread, making the internal stress of the processed part smaller. Furthermore, when the thread is working, the transition shoulder allows the lubricant to flow smoothly between multiple threads, which can better release friction heat.

[0033] The above specific embodiments are only used to explain the utility model, not to limit the utility model. Any changes and substitutions made to the utility model without creative labor within the scope of protection of the concept and claims of the utility model shall fall within the scope of protection of the utility model patent.

Claims

1. A variable tooth nut, characterized in that: It comprises a nut body, which is provided with an internal thread. The bottom of the internal thread is provided with a receiving groove, the side wall of the receiving groove is arc-shaped, and the side wall of the receiving groove is smoothly transitionally connected to the side wall of the internal thread.

2. The variable tooth profile nut according to claim 1, characterized in that: The side wall of the accommodating groove is formed by splicing a plurality of arc sections.

3. The variable tooth nut according to claim 1, characterized in that: The cross section of the containing groove is in the shape of a water drop.

4. The variable thread profile nut according to claim 1, characterized in that: The receiving groove is symmetrical with respect to itself.

5. The variable tooth profile nut according to claim 1, characterized in that: The depth of the receiving groove is 0.01-0.2 mm.

6. The variable tooth profile nut according to any one of claims 1 to 5, characterized in that: The projected length of the width of the receiving groove on the axis of the nut is usually 1 / 16-1 / 6 of the thread pitch.

7. The variable thread profile nut according to claim 1, characterized in that: The top of the internal thread is provided with an arc-shaped transition shoulder.

8. The variable tooth profile nut according to claim 7, characterized in that: The arc-shaped transition shoulder is formed by splicing one or more arc segments.

9. The variable tooth profile nut according to claim 7, characterized in that: The arc-shaped transition shoulder is smoothly transitionally connected to the tooth side wall.

10. The variable tooth profile nut according to any one of claims 7 to 9, characterized in that: The total length of the arc-shaped transition shoulder is approximately 1 / 16-1 / 6 of the nut lead.

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