Injection molding nut
By introducing anti-slip teeth and a limiting mechanism into the injection nut, the problems of loose engagement and easy detachment of existing injection nuts are solved, resulting in a more stable connection and better torsional and tensile strength, while reducing production costs.
Patent Information
- Application Number
- CN202520421398.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-03-12
AI Technical Summary
Existing injection-molded nuts have complex processes, and the knurling is usually cylindrical, resulting in insufficient interlocking friction, which leads to weak engagement, easy detachment, poor durability, and easy loosening under vibration or prolonged use, resulting in unstable connections.
An injection-molded nut was designed, comprising a body, a boss, anti-slip serrations, an internal thread, an internal thread hole, and a limiting mechanism. The limiting mechanism consists of a ring, a return spring, and a limiting rod. The anti-slip serrations increase friction, and the limiting mechanism ensures a stable connection between the bolt and the internal thread. The cold heading integral molding process reduces production costs.
It improves friction and interlocking stability, enhances torsional and tensile strength, ensures reliable connection, is convenient and quick to use, is energy-saving and environmentally friendly, has low production costs, and is lightweight.
Smart Images
Figure CN223578476U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to technical fields especially relates to a injection nut. BACKGROUND
[0002] The injection nut is a kind of nut produced by injection molding process, usually by plastic material plus embedded plastic nut pouring, by the molten plastic injection into mould, then after cooling to form the shape required.
[0003] The main function of injection nut is to provide a reliable and convenient thread connection, so that different parts can be firmly combined together, after injection, not only to provide a good torsional performance but also to have tensile property, it is a kind of fastener widely used in civil, commercial, military and other fields, especially widely used in automobiles, aviation and other large machinery.
[0004] But in prior art, most of the processes of embedded nut are complex, knurl is usually column, and the engagement friction is insufficient, which leads to the embedding between plastic and nut not firm, and it is easy to fall off when subjected to external force such as excessive vibration, and the durability is not strong, when fixing other parts, the nut is easy to separate from the injection part, it cannot be integrally formed, and long time working in plastic parts will cause the injection nut loose in the injection part, leading to unstable connection between bolt and injection nut. CONTENT OF THE UTILITY MODEL
[0005] The utility model aims at providing a injection nut, solve the problem that in prior art, most of the processes of embedded nut are complex, knurl is usually column, and the engagement friction is insufficient, which leads to the embedding between plastic and nut not firm, and it is easy to fall off when subjected to external force such as excessive vibration, and the durability is not strong, when fixing other parts, the nut is easy to separate from the injection part, it cannot be integrally formed, and long time working in plastic parts will cause the injection nut loose in the injection part, leading to unstable connection between bolt and injection nut.
[0006] To realize the above-mentioned purpose, the utility model provides a injection nut, including main part, boss and limiting mechanism, the outer wall of main part has a plurality of antiskid gear teeth, the inner wall of main part has internal thread, the front end of main part has arc angle, the inside of main part has internal screw hole, the boss is fixedly connected with the rear end of main part.
[0007] Among them, the limiting mechanism includes ring, reset spring and limiting rod, the boss has recess, the reset spring is arranged in the inside of recess, one end of limiting rod is slidably connected with recess, one end of reset spring is fixedly connected with the inner wall of recess, the other end of reset spring is fixedly connected with limiting rod.
[0008] The limiting rod is provided with an inclined surface, and the circular ring is provided with a plurality of limiting holes which are distributed around and located behind the boss and matched with the limiting rod.
[0009] The inclined surface is in contact with the corresponding limiting hole, and a plurality of anti-skid gear teeth are located at the rear section of the main body.
[0010] The anti-skid gear teeth are arranged to improve the friction and the anti-skid effect of the main body, the inner thread is matched with the external bolt, the inner screw hole is arranged for subsequent tapping, the device has low production process cost, light product weight, quantification, the arc angle is realized by cold upsetting, subsequent additional processing is not required, the device can be firmly embedded in a plastic part after injection molding, product performance is improved, the embedding feature has stronger embeddability, the device is more stable after injection molding, has better torsion resistance and pull-out resistance, is convenient and fast to use, reliable in connection, and energy-saving and environment-friendly. BRIEF DESCRIPTION OF DRAWINGS
[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced.
[0012] Figure 1 is a structural schematic view of the main body of the utility model.
[0013] Figure 2 is a sectional view of the main body of the utility model.
[0014] Figure 3 is a structural schematic view of the limiting mechanism of the utility model.
[0015] Figure 4 is a front view of the limiting mechanism of the utility model.
[0016] Figure 5 is the A-A line sectional view of the utility model. Figure 4
[0017] 1-main body, 2-boss, 3-anti-skid gear tooth, 4-inner thread, 5-arc angle, 6-inner screw hole, 7-circular ring, 8-return spring, 9-limiting rod, 10-groove, 11-inclined surface, 12-limiting hole. DETAILED DESCRIPTION
[0018] The embodiments of the utility model will be described in detail below, examples of the embodiments are shown in the drawings, the embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model.
[0019] Please refer toFigures 1 to 5 wherein, Figure 1 is the structure diagram of the main body 1 of the utility model, Figure 2 is the sectional view of the main body 1 of the utility model, Figure 3 is the structure diagram of the limiting mechanism of the utility model, Figure 4 is the front view of the limiting mechanism of the utility model, Figure 5 is the Figure 4 A-A line sectional view of the utility model.
[0020] The utility model provides a kind of injection nut, including main body 1, boss 2 and limiting mechanism, the outer wall of main body 1 has multiple anti-skid gear teeth 3, the inner wall of main body 1 has internal thread 4, the front end of main body 1 has arc angle 5, the inside of main body 1 has internal thread hole 6, the boss 2 is fixedly connected with the rear end of main body 1.
[0021] In the embodiment, by the setting of the anti-skid gear tooth 3, the friction can be improved, and then the anti-skid effect of the main body 1 is improved, the internal thread 4 is matched with the external bolt, and the internal thread hole 6 is set for subsequent tapping use. The production process cost of the device is low, the product is light, and the product is quantifiable. The arc angle 5 is realized by cold upsetting, and subsequent additional processing technology is not required. After injection molding, it can be firmly embedded in the plastic part to increase the product performance. The embedded plastic feature is more embedded, making the injection molding more stable, the torsion and pull-out resistance better, easy to use, reliable connection and energy-saving and environment-friendly.
[0022] Further, the limiting mechanism includes a circular ring 7, a return spring 8 and a limiting rod 9. The boss 2 has a groove 10. The return spring 8 is arranged inside the groove 10. One end of the limiting rod 9 is slidingly fitted with the groove 10. One end of the return spring 8 is fixedly connected with the inner wall of the groove 10. The other end of the return spring 8 is fixedly connected with the limiting rod 9. The limiting rod 9 has an inclined surface 11. The circular ring 7 has a plurality of limiting holes 12 distributed around. The circular ring 7 is located behind the boss 2. The limiting holes 12 correspond to the limiting rod 9. The inclined surface 11 is in contact with the limiting holes 12. A plurality of anti-skid gear teeth 3 are located at the rear of the main body 1.
[0023] In the embodiment, the circular ring 7 is fixedly connected with the external bolt. When the bolt is inserted into the main body 1 and is fitted, the bolt is limited by the limiting rod 9 and the corresponding limiting hole 12, thereby avoiding the bolt from being separated from the internal thread 4. Further, when the circular ring 7 rotates with the bolt, the limiting rod 9 is pushed to slide into the groove 10 by the cooperation of the limiting hole 12 and the chamfered surface 11, and then the limiting rod 9 returns to the original position by the action of the reset spring 8 until the bolt is completely fitted with the main body 1.
[0024] The above disclosure is only one or more preferred embodiments of the present application, which cannot limit the scope of the present application. Those skilled in the art can understand that the implementation of all or part of the above-mentioned embodiments is still within the scope of the present application.
Claims
1. A type of injection-molded nut, characterized in that, Includes the main body, the boss, and the limiting mechanism; The outer wall of the main body has multiple anti-slip teeth, the inner wall of the main body has internal threads, the front end of the main body has an arc-shaped angle, the interior of the main body has an internal threaded hole, and the boss is fixedly connected to the rear end of the main body.
2. The injection-molded nut as described in claim 1, characterized in that, The limiting mechanism includes a ring, a return spring, and a limiting rod. The boss has a groove, the return spring is disposed inside the groove, one end of the limiting rod is slidably adapted to the groove, one end of the return spring is fixedly connected to the inner wall of the groove, and the other end of the return spring is fixedly connected to the limiting rod.
3. The injection-molded nut as described in claim 2, characterized in that, The limiting rod has a beveled surface, and the ring has multiple circumferentially distributed limiting holes. The ring is located behind the boss, and the corresponding limiting holes are adapted to the limiting rod.
4. The injection-molded nut as described in claim 3, characterized in that, The beveled surface contacts the corresponding limiting hole, and the plurality of anti-slip teeth are located at the rear section of the main body.