CN204784060U - Locating lock screw - Google Patents

Abstract

The utility model discloses a positioning anti-loosening screw, which comprises a head and a rod body, the center position of the upper surface of the head is recessed inward to form a twisting groove, the upper outer surface of the rod body is a smooth surface, and the lower surface is provided with a thread, the upper end of the rod body is connected to the center position of the lower surface of the head, and corresponding peripheral positions of the rod body are symmetrically provided with a plurality of inverted teeth on the lower surface of the head in a circle-centered manner, and the tooth tips of the inverted teeth are oriented in accordance with the rotation direction of the thread; the structural design of the utility model is reasonable, and a plurality of inverted teeth are cleverly provided on the lower surface of the head, and the tooth tips of the inverted teeth are oriented in accordance with the rotation direction of the thread, which effectively improves the positioning stability, has a good anti-slip effect, is not easy to loosen due to vibration, has good stability, and is firmly connected; and the overall structure is simple, can be formed at one time by a mold, has a relatively low cost, and is convenient for large-scale promotion and application.

Description

Locating lock screw

technical field

The utility model relates to the technical field of screws, in particular to a positioning anti-loosening screw.

Background technique

The screw is a tool for tightening the parts of the object step by step by using the physical and mathematical principles of the oblique circular rotation and friction of the object. Screw is a general term for fasteners, a daily colloquial language. Screws are indispensable industrial necessities in daily life: tiny screws used in cameras, glasses, clocks, electronics, etc.; general screws for TVs, electrical products, musical instruments, furniture, etc.; large screws for engineering, construction, and bridges. Screws and nuts; transportation equipment, airplanes, trams, automobiles, etc. are used together with large and small screws. Screws have important tasks in industry. As long as there is industry on the earth, the function of screws will always be important. Screw is a common invention in people's production and life for thousands of years. According to the application field, it is the largest invention of human beings.

However, although the existing screws can meet the function of connecting and fastening objects, they are prone to loosening due to vibration after the screws are tightened; therefore, the only way to improve the positioning stability is to add gaskets or apply anti-loose glue , which not only brings trouble to the operation, but also increases the cost.

Utility model content

In view of the above disadvantages, the purpose of this utility model is to provide a positioning anti-loosening screw with ingenious and reasonable structural design, which is not easy to loosen and firmly connected.

In order to achieve the above purpose, the technical solution provided by the utility model is: a positioning anti-loosening screw, which includes a head and a rod body, the center position of the upper surface of the head is inwardly recessed to form a twisting groove, the The outer surface of the upper part of the rod body is a smooth surface, and the lower surface is provided with threads. A plurality of inverted teeth, the orientation of the tip of the inverted teeth is consistent with the direction of rotation of the thread.

As an improvement of the utility model, the number of the inverted teeth is four, and they are symmetrically arranged on the lower surface of the head, which has good anti-slip effect and is not easy to loosen.

As an improvement of the utility model, the cross-sectional profile of the twisting groove is quincunx or regular hexagonal, which can effectively prevent slippage, has the characteristics of high strength, high precision and long service life.

As an improvement of the utility model, the upper surface of the head is a smooth surface, which is convenient for tightening connection.

As an improvement of the utility model, the head and the rod body are connected in one structure, and the connection is firm and the stability is good.

As an improvement of the utility model, the outer surface is electroplated with a colored zinc layer, and then dehydrogenated for 6 hours to effectively improve wear resistance, alkali resistance and acid resistance.

The beneficial effects of the utility model are: the structure design of the utility model is reasonable, and a plurality of inverted teeth are skillfully arranged on the lower surface of the head. Good stability, good anti-skid effect, not easy to loose due to vibration, good stability, firm connection; and the overall structure is simple, can be molded at one time through the mold, the cost is relatively low, and it is convenient for large-scale promotion and application.

Below in conjunction with accompanying drawing and embodiment, the utility model is further described.

Description of drawings

Fig. 1 is a front structural schematic view of the utility model.

Fig. 2 is a top view structural diagram of the utility model.

Detailed ways

Referring to Fig. 1 and Fig. 2, a positioning anti-loosening screw provided in this embodiment includes a head 1 and a rod body 2, and the center position of the upper surface of the head 1 is inwardly recessed to form a twisting groove 11, so that The upper outer surface of the rod body 2 is a smooth surface, and the lower surface is provided with a screw thread 21. The upper end of the rod body 2 is connected to the center of the lower surface of the head 1, and the corresponding peripheral position of the rod body 2 is located under the head 1. A plurality of inverted teeth 12 are symmetrically arranged on the surface, and the tip orientation of the inverted teeth 12 is consistent with the direction of rotation of the thread 21 . The upper surface of the head 1 is a smooth surface, which is convenient for tightening connection. The head 1 and the rod body 2 have an integrated connection structure, which not only has a firm connection and good stability, but also the barb tooth 12 can be molded at one time by a mold, which is low in cost and easy to implement. The periphery of the upper outer surface of the rod body 2 is provided with chamfers.

In this embodiment, the height of the inverted teeth 12 is 0.5-1.2 mm, and the number is four, which are symmetrically arranged on the lower surface of the head 1 , and have good anti-slip effect and are not easy to loosen.

Preferably, the cross-sectional profile of the twisting groove 11 is a quincunx shape, which can effectively prevent slipping, has the characteristics of high strength, high precision, and long service life. In other embodiments, the cross-sectional profile of the twisting groove 11 may be a regular hexagon.

As an improvement of the utility model, the upper surface of the head 1 is a smooth surface, which is convenient for tightening connection. The head 1 and the rod body 2 are integrally connected, and the connection is firm and stable.

In order to prolong the service life, the outer surface of the positioning anti-loosening screw of the utility model is also electroplated with a color zinc layer, and then dehydrogenated for 6 hours to effectively improve wear resistance, alkali resistance and acid resistance.

When in use, directly screw the positioning and anti-loosening screw of the utility model into the screw hole of the object. When tightening, the lower surface of the head 1 is correspondingly pressed against the surface of the object, so that the inverted teeth 12 tightly bite on the object. On the surface of the object, it is not easy to loose due to vibration, the anti-skid effect is good, and the stability is high.

According to the disclosure and teaching of the above specification, those skilled in the art to which the present utility model belongs can also change and modify the above embodiment. Therefore, the utility model is not limited to the specific implementation manners disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model. As described in the above embodiments of the utility model, other screws obtained by adopting the same or similar structure are within the protection scope of the utility model.

Claims (7)

1. A positioning anti-loosening screw, which includes a head and a rod body, characterized in that, the center position of the upper surface of the head is inwardly recessed to form a twisting groove, and the upper outer surface of the rod body is a smooth surface, The lower surface is provided with threads, the upper end of the rod body is connected to the center of the lower surface of the head, and a plurality of inverted teeth are symmetrically arranged on the lower surface of the head corresponding to the peripheral position of the rod body. The orientation of the tooth tip is consistent with the direction of rotation of the thread. 2. The positioning and anti-loosening screw according to claim 1, characterized in that: the number of said inverted teeth is four, which are symmetrically arranged on the lower surface of said head. 3. The positioning anti-loosening screw according to claim 1 or 2, characterized in that: the cross-sectional profile of the twisting groove is a quincunx or a regular hexagon. 4. The positioning anti-loosening screw according to claim 1, characterized in that: the upper surface of the head is a smooth surface. 5. The positioning anti-loosening screw according to claim 1, characterized in that: the head and the rod body are integrally connected. 6. The positioning anti-loosening screw according to claim 5, characterized in that: the outer surface is electroplated with a colored zinc layer. 7. The positioning anti-loosening screw according to claim 1, characterized in that: the height of the inverted teeth is 0.5-1.2mm.