Quickly-installed cross-shaped self-tapping screw

Abstract

The utility model discloses a quick installation cross self-tapping screw which comprises a rod body, a tip head is fixedly installed on the outer surface of the lower end of the rod body, a nut is arranged on the upper portion of the rod body, the density of threads on the outer wall of the rod body is smaller than that of threads on the outer wall of the tip head, and a limiting block is fixedly installed on the outer surface of the upper end of the rod body. An inserting groove is formed in the middle of the outer surface of the lower end of the nut, anti-loosening assemblies are arranged on the left side and the right side of the outer surface of the lower end of the nut, a cross-shaped groove is formed in the middle of the outer surface of the upper end of the nut, and the number of the anti-loosening assemblies is two. According to the cross-shaped self-tapping screw capable of being rapidly installed, the density of the threads on the outer wall of the tip head is larger than that of the threads on the outer wall of the rod body, time can be saved, efficiency can be improved due to the fact that the density of the threads is large, and the screw can be easily drilled into an object; looseness after the screw is installed can be eliminated, and stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screws, in particular to a cross self-tapping screw which can be quickly installed. Background Art

[0002] The main function of cross self-tapping screws is that they can form threaded connections directly on the materials being connected without pre-tapping or drilling.

[0003] The cross self-tapping screws in the prior art have the following disadvantages when used:

[0004] 1. The force required to screw into an object (such as wood) is large, which reduces the speed of installing cross self-tapping screws;

[0005] 2. In the prior art, the cross self-tapping screws will become loose after installation. The main reasons for the loosening of the cross self-tapping screws after installation include vibration, dynamic load, mechanical shock, etc.

[0006] For this purpose, we propose a quick-installation cross self-tapping screw. Utility Model Content

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the utility model provides a quickly installed cross self-tapping screw, which is convenient for reducing the speed of installing the cross self-tapping screw and can improve the stability of the cross self-tapping screw after installation, and can effectively solve the problems in the background technology.

[0009] (II) Technical solution

[0010] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a quick-installation cross self-tapping screw, comprising a rod body, a pointed head fixedly installed on the lower end outer surface of the rod body, a nut is arranged on the upper part of the rod body, the density of the outer wall thread of the rod body is less than the density of the outer wall thread of the pointed head, a limiting block is fixedly installed on the upper end outer surface of the rod body, a slot is provided in the middle part of the lower end outer surface of the nut, anti-loosening components are provided on the left and right sides of the lower end outer surface of the nut, a cross slot is provided in the middle part of the upper end outer surface of the nut, the number of anti-loosening components is two groups, the anti-loosening components include mounting holes, compression springs, movable columns, limiting grooves and balls, and the mounting holes are provided on the left and right sides of the lower end outer surface of the nut.

[0011] Preferably, the outer wall of the limit block is plug-connected with the slot.

[0012] Preferably, the outer surface of the upper end of the rod body and the outer surface of the lower end of the nut are welded.

[0013] Preferably, the compression spring is located in the mounting hole, the upper outer surface of the compression spring is fixedly connected to the upper end of the mounting hole, and the lower outer surface of the compression spring is fixedly connected to the upper outer surface of the movable column.

[0014] Preferably, the limiting groove is formed on the outer surface of the lower end of the movable column, and the ball is rotatably installed in the limiting groove.

[0015] Preferably, the outer wall of the movable column is slidably connected to the mounting hole, and the outer surface of the upper end of the movable column is elastically connected to the upper end of the mounting hole via a compression spring.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the utility model provides a cross self-tapping screw for quick installation, which has the following beneficial effects:

[0018] 1. A quick-install cross self-tapping screw, the thread density of the outer wall of the tip head is greater than the thread density of the outer wall of the rod body. The larger thread density can save time and improve efficiency, so that the screw can be easily drilled into an object.

[0019] 2. This kind of quick-installation cross self-tapping screw can eliminate loosening of the screw after installation and improve stability by installing an anti-loosening component at the bottom of the nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a schematic diagram of the overall structure of a cross self-tapping screw for quick installation.

[0021] Figure 2 The utility model is a schematic diagram of the partial structure of a cross self-tapping screw for quick installation.

[0022] Figure 3 The utility model is a schematic diagram of the bottom structure of a nut in a cross self-tapping screw for quick installation.

[0023] Figure 4 The utility model is a kind of cross self-tapping screw for quick installation Figure 3 Side cross-sectional view of the structure.

[0024] In the figure: 1. rod body; 2. pointed head; 3. nut; 4. cross slot; 5. limit block; 6. slot; 7. anti-loosening component; 8. mounting hole; 9. compression spring; 10. movable column; 11. limit slot; 12. ball. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] The present embodiment is a cross self-tapping screw for quick installation.

[0027] like Figure 1-4 As shown, it includes a rod body 1, a pointed head 2 is fixedly installed on the outer surface of the lower end of the rod body 1, a nut 3 is arranged on the upper part of the rod body 1, the density of the outer wall thread of the rod body 1 is less than the density of the outer wall thread of the pointed head 2, a limiting block 5 is fixedly installed on the outer surface of the upper end of the rod body 1, a slot 6 is opened in the middle of the outer surface of the lower end of the nut 3, anti-loosening components 7 are arranged on the left and right sides of the outer surface of the lower end of the nut 3, a cross groove 4 is opened in the middle of the outer surface of the upper end of the nut 3, the number of anti-loosening components 7 is two groups, the anti-loosening components 7 include mounting holes 8, compression springs 9, movable columns 10, limiting grooves 11 and balls 12, and the mounting holes 8 are opened on the left and right sides of the outer surface of the lower end of the nut 3.

[0028] The outer wall of the limit block 5 is plugged into the slot 6; the upper outer surface of the rod body 1 and the lower outer surface of the nut 3 are welded; the compression spring 9 is located in the mounting hole 8, the upper outer surface of the compression spring 9 is fixedly connected to the upper end of the mounting hole 8, and the lower outer surface of the compression spring 9 is fixedly connected to the upper outer surface of the movable column 10; the limit groove 11 is opened on the lower outer surface of the movable column 10, and the ball 12 is rotatably installed in the limit groove 11; the outer wall of the movable column 10 and the mounting hole 8 are slidably connected, and the upper outer surface of the movable column 10 is elastically connected to the upper end of the mounting hole 8 through the compression spring 9.

[0029] It should be noted that the utility model is a cross self-tapping screw that can be quickly installed. The thread density of the outer wall of the tip head 2 is greater than the thread density of the outer wall of the rod body 1. The larger thread density can save time and improve efficiency, so that the screw can be easily drilled into an object. The thread of the outer wall of the rod body 1 is sparse, and the cross-sectional size of each tooth of the sparse thread is larger, the force is better, and it can better cope with larger external forces. The nut 3 is set. When the rod body 1 and the nut 3 are connected, the limit block 5 is inserted into the slot 6, and the rod body 1 and the nut 3 are connected. Welding is performed, and the limit block 5 is set to improve the stability between the rod body 1 and the nut 3 when the nut 3 rotates; an anti-loosening component 7 is installed at the bottom of the nut 3, and when the cross self-tapping screw is installed, the movable column 10 is squeezed, and the movable column 10 squeezes the compression spring 9 inside the installation hole 8. When the cross self-tapping screw is installed, the compression spring 9 is in a compressed state, which can eliminate the looseness of the cross self-tapping screw after installation, and the set ball 12 reduces the resistance encountered when the nut 3 rotates when it contacts the surface of an object.

[0030] It should be noted that, in this article, relational terms such as first and second (number one, number two), etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0031] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A quick-install cross self-tapping screw, comprising a rod body (1), a pointed head (2) fixedly mounted on the outer surface of the lower end of the rod body (1), and a nut (3) disposed on the upper portion of the rod body (1), characterized in that: The density of the threads on the outer wall of the rod body (1) is smaller than the density of the threads on the outer wall of the tip head (2); a limit block (5) is fixedly installed on the outer surface of the upper end of the rod body (1); a slot (6) is provided in the middle of the outer surface of the lower end of the nut (3); anti-loosening components (7) are provided on the left and right sides of the outer surface of the lower end of the nut (3); a cross slot (4) is provided in the middle of the outer surface of the upper end of the nut (3); the number of the anti-loosening components (7) is two groups; the anti-loosening components (7) include a mounting hole (8), a compression spring (9), a movable column (10), a limit slot (11) and a ball (12); and the mounting hole (8) is provided on the left and right sides of the outer surface of the lower end of the nut (3).

2. A quick-installation cross self-tapping screw according to claim 1, characterized in that: The outer wall of the limit block (5) is plugged into the slot (6).

3. A quick-installation cross self-tapping screw according to claim 2, characterized in that: The upper end outer surface of the rod body (1) and the lower end outer surface of the nut (3) are welded.

4. A quick-installation cross self-tapping screw according to claim 3, characterized in that: The compression spring (9) is located in the mounting hole (8), the upper outer surface of the compression spring (9) is fixedly connected to the upper end of the mounting hole (8), and the lower outer surface of the compression spring (9) is fixedly connected to the upper outer surface of the movable column (10).

5. A quick-installation cross self-tapping screw according to claim 4, characterized in that: The limiting groove (11) is formed on the outer surface of the lower end of the movable column (10), and the ball (12) is rotatably mounted in the limiting groove (11).

6. A quick-installation cross self-tapping screw according to claim 5, characterized in that: The outer wall of the movable column (10) is slidably connected to the mounting hole (8), and the outer surface of the upper end of the movable column (10) is elastically connected to the upper end of the mounting hole (8) via a compression spring (9).

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