Cross recessed pan head screw

Abstract

The utility model discloses a cross recess pan head screw which comprises a screw pan head, a step is fixed on the inner wall of the screw pan head, a screw rod is arranged at one end, far away from the screw pan head, of the step, a gasket is sleeved on the outer wall of one end, close to the screw pan head, of the step, and a limiting structure is fixed on the outer wall of the step. A cross-shaped deep groove is formed in the outer wall of the side, away from the step, of the screw pan head, a gasket inner hole is formed in the center of the interior of the gasket, the two ends of the gasket inner hole extend to the exterior of the gasket, the diameter of the gasket inner hole is larger than that of the step, and the diameter of the limiting structure is larger than that of the step and larger than that of the gasket inner hole. According to the cross recessed pan head screw, the convenience during manufacturing of the cross recessed pan head screw is improved, the phenomenon that the rubber sleeve gasket is loosened and slips can be reduced, the purpose that the cross recessed pan head screw is easy to screw and control is achieved, the rigid strength of the cross recessed pan head screw is improved, and the service life of the cross recessed pan head screw is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of screws, in particular to a cross recessed pan head screw. Background Art

[0002] A cross-recessed pan head screw is a machine screw with a cross recess. Its head is in the shape of a pan head, that is, a screw with a head diameter larger than the shaft diameter. It adopts a cross-recess design, which is convenient for tightening and loosening with tools such as screwdrivers. The cross-recessed pan head screw mainly consists of three parts: the head, the shaft and the thread. The head is disc-shaped with a cross slot in the middle, and the shaft is cylindrical with threads. The threaded part is used to form a tight connection with the connected materials. With the continuous improvement of industrial products' requirements for fastener performance, the development of cross-recessed pan head screws has important practical significance.

[0003] Reference announcement number CN219733872U is a cross recessed pan head screw, which includes a nut, the bottom of the nut is fixedly connected to a screw, the upper end of the screw surface is sleeved with a washer, the surface of the screw is provided with a spiral pattern, the nut includes a cylindrical disk, a ball disk, a cross groove, anti-slip teeth and a through hole, the bottom of the cylindrical disk is fixedly connected to the top of the screw, the cross recessed pan head screw, by providing a cylindrical disk and anti-slip teeth, can provide space for hand tightening, and increase the friction with the fingers, so that the device can be easily disassembled and assembled, and by providing a through hole, it can be in the cross recessed When the groove is damaged, a steel wire is inserted to provide leverage and drive the device to rotate and remove it, thereby avoiding the phenomenon that the screw is damaged and cannot be removed from the surface of the mounting part. By providing a gasket, the contact area between the device and the part can be increased, the pressure can be reduced, loosening can be prevented, and the parts and the screw top can be protected. According to the above, although the cross-recessed pan head screw can be well applied, in the traditional process, the sleeve gasket is limited on the screw by a thread, which makes the processing technology of the cross-recessed pan head screw more complicated and inconvenient to manufacture, and the sleeve gasket is easy to loosen and fall off on the screw part, which often troubles users. Utility Model Content

[0004] The purpose of the present utility model is to provide a cross recessed pan head screw to solve the problem raised in the above background technology that although the cross recessed pan head screw can be well applied, in the traditional process, the washer is limited on the screw rod by extruding and rolling the thread so that the outer diameter is larger than the outer diameter of the original polished rod. This traditional process is only applicable to screws with full threads, and the applicable structure is relatively limited, and cannot meet the screw structure requirements of special assembly positions.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a cross-recessed pan head screw, comprising a screw pan head, a step fixed on the inner wall of the screw pan head, a washer mounted on the outer wall of the step close to one end of the screw pan head, a screw rod provided on the end of the step away from the pan head, a limiting structure provided on the end of the step away from the screw pan head, and a cross-shaped deep groove provided on the outer wall of the screw pan head away from the step.

[0006] Preferably, the groove depth of the cross-shaped deep groove is set to 2.29 mm, and the screw pan head is made of metal material. By using metal material to make the screw pan head, the rigid structure of the cross-slot pan head screw is improved.

[0007] Preferably, a washer hole is provided at the center position inside the washer, and both ends of the washer hole extend to the outside of the washer. The washer hole diameter is set larger than the outer diameter of the step so that the washer can be sleeved on the outside of the step.

[0008] Preferably, the diameter of the washer hole is larger than the diameter of the step. After thread rolling, the diameter of the limiting structure is larger than the step diameter and larger than the inner diameter of the washer, but smaller than the diameter of the assembly step hole, so that the washer can move freely on the step. At the limiting structure, because the diameter of the limiting structure is larger than the diameter of the inner hole of the washer, the washer will not slip completely. The diameter of the limiting structure is smaller than the diameter of the assembly step hole, which does not affect the assembly.

[0009] Preferably, the material structure of the step is set to metal, and the diameter of the step is equal to the inner diameter of the limiting ring. The rigid structure of the cross recessed pan head screw is improved by using metal material to make the pan head.

[0010] Preferably, the material structure of the screw is set to metal, and the screw pan head is set to a disc-shaped structure. By using metal material to make the screw, the rigid structure of the cross-recessed pan head screw is improved.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the cross recessed pan head screw not only improves the convenience in manufacturing the cross recessed pan head screw, but also adopts the characteristic of the limiting structure at the step to solve the problem that the polished step screw cannot limit the washer to prevent it from slipping, which leads to the inability to realize automatic assembly, thereby improving production efficiency and assembly efficiency; the pan head of the metal material improves the rigidity strength of the cross recessed pan head screw and prolongs the service life of the cross recessed pan head screw;

[0012] (1) By setting a limiting ring, the washer set is set on the outer wall of the step between the screw pan heads, and the limiting structure is extruded and formed by rolling the threads, thereby limiting the washer from slipping off. Compared with the traditional method of limiting the washer on the screw by the outer diameter of the thread, the present screw uses the size difference of the diameter of the limiting structure being larger than the diameter of the inner hole of the washer to limit the washer, thereby simplifying the manufacturing process of the screw, thereby improving the convenience of manufacturing the cross-slot pan head screw, and can make up for the gap that the step washer screw cannot be automatically produced by limiting the washer from slipping off;

[0013] (2) A cross-shaped deep groove is provided on the outer wall of the screw pan head to accommodate the bit of a screwdriver or other installation tool, and the shape of the screw pan head is set to be disc-shaped to facilitate contact with the tool and transmission of torque during the installation process. The edge area of the screw pan head is smoothed to reduce damage to the installation surface, thereby achieving the purpose of facilitating the screwing and manipulation of the cross-slotted pan head screw;

[0014] (3) By using metal materials to make the entire screw, the rigidity strength of the cross slot pan head screw can be greatly improved, so as to effectively reduce the wear of the cross slot pan head screw, thereby extending the service life of the cross slot pan head screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the front view structure of the utility model;

[0017] Figure 3 This is a side view of the structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the enlarged side view of the gasket of the utility model.

[0019] In the figure: 1. Screw pan head; 101. Cross-shaped deep groove; 2. Washer; 201. Inner hole of washer; 3. Limiting structure; 4. Step; 5. Screw. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-4The utility model provides an embodiment: a cross recessed pan head screw, comprising a screw pan head 1, a step 4 fixed on the inner wall of the screw pan head 1, the material structure of the step 4 is set to metal, and the diameter of the step 4 is equal to the inner diameter of the limiting structure 3;

[0022] When in use, the step 4 is made of metal material to improve the rigid structure of the cross recessed pan head screw;

[0023] A screw rod 5 is provided at one end of the step 4 away from the screw pan head 1. The material structure of the screw rod 5 is set to metal, and the screw pan head 1 is set to a flat disc-shaped structure;

[0024] When in use, the screw rod 5 is made of metal material to improve the rigid structure of the cross recessed pan head screw;

[0025] A washer 2 is mounted on the outer wall of the step 4 near the screw head 1. A washer inner hole 201 is provided at the center of the washer 2. Both ends of the washer inner hole 201 extend to the outside of the washer 2.

[0026] When in use, the gasket inner hole 201 is set so that the gasket 2 can be placed on the outside of the step 4;

[0027] The diameter of the gasket inner hole 201 is larger than the diameter of the step 4 , and the diameter of the limiting structure 3 is larger than the diameter of the step 4 and larger than the diameter of the gasket inner hole 201 ;

[0028] When in use, the diameter of the limiting structure 3 is larger than the diameter of the step 4 and larger than the diameter of the gasket inner hole 201, so as to reduce the phenomenon of the gasket 2 falling off;

[0029] The limiting structure 3 is fixed on the outer wall of the step 4, and a cross-shaped deep groove 101 is provided on the outer wall of the screw pan head 1 away from the step 4. The groove depth of the cross-shaped deep groove 101 is set to 2.29 mm. The screw pan head 1 is made of metal material;

[0030] When in use, the screw pan head 1 is made of metal material to improve the rigid structure of the cross recessed pan head screw.

[0031] When in use, the embodiment of the present application first uses a metal material to make the screw pan head 1, uses a metal material to make the step 4, and uses a metal material to make the screw shank 5, thereby improving the overall rigidity of the cross recessed pan head screw, thereby reducing the wear of the cross recessed pan head screw after long-term use, and extending the service life of the cross recessed pan head screw. Then, a cross-shaped deep groove 101 is provided on the outer wall of the screw pan head 1 to accommodate the bit of an installation tool such as a screwdriver, and the shape of the screw pan head 1 is set to be a flat disc to facilitate contact with the tool and transmit torque during installation. The edge area of the screw pan head 1 is smoothed to reduce damage to the installation surface. Finally, a limiting structure 3 is provided to allow the washer 2 to be mounted on the outer wall of the step 4 between the limiting structure 3 and the screw pan head 1. Compared with the traditional method of directly mounting the washer 2 on the screw shank 5, the present screw uses the limiting structure 3 to limit the washer 2, thereby effectively preventing the washer 2 from falling off, thereby completing the use of the cross recessed pan head screw.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0033] While the present invention has been described above with reference to exemplary embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as no structural conflicts exist, the various features of the disclosed embodiments may be combined with one another in any manner. The omission of an exhaustive description of these combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A cross recessed pan head screw, characterized in that: The invention comprises a screw pan head (1), a step (4) is fixed on the inner wall of the screw pan head (1), a screw rod (5) is arranged on the end of the step (4) away from the screw pan head (1), a washer (2) is sleeved on the outer wall of the step (4) close to the end of the screw pan head (1), a limiting structure (3) is fixed on the outer wall of the step (4), and a cross-shaped deep groove (101) is arranged on the outer wall of the screw pan head (1) away from the step (4).

2. The cross recessed pan head screw according to claim 1, characterized in that: The groove depth of the cross-shaped deep groove (101) is set to 2.29 mm, and the screw pan head (1) is made of metal material.

3. The cross recessed pan head screw according to claim 1, wherein: A gasket inner hole (201) is provided at the center position inside the gasket (2), and both ends of the gasket inner hole (201) extend to the outside of the gasket (2).

4. The cross recessed pan head screw according to claim 3, characterized in that: The diameter of the gasket inner hole (201) is greater than the diameter of the step (4), and the diameter of the limiting structure (3) is greater than the diameter of the step (4) and greater than the diameter of the gasket inner hole (201).

5. The cross recessed pan head screw according to claim 1, wherein: The material structure of the step (4) is set to metal, and the diameter of the step (4) is equal to the inner diameter of the limiting structure (3).

6. The cross recessed pan head screw according to claim 1, wherein: The material structure of the screw rod (5) is set to metal, and the screw pan head (1) is set to a flat disc-shaped structure.

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