Cross recess flat round head flange face self-tapping locking screw
By designing an anti-skew guide cylinder and an anti-rotation ring plate on the self-tapping locking screw, the problems of screw skew and loosening during self-tapping locking on the flange face are solved, achieving precise guidance and stable locking.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-03
- Publication Date
- 2026-04-07
AI Technical Summary
The existing self-tapping locking screws have a conical end, which makes the screws prone to tilting when self-tapping and locking on the flange surface, and they lack an anti-rotation structure, making them easy to loosen.
An anti-misalignment guide cylinder and an anti-rotation ring plate were designed. The anti-misalignment guide cylinder has a self-tapping thread inside and a regular hexagonal structure on the outside. It has a limit ring plate at the bottom. With the help of the elastic anti-loosening ring and the anti-rotation ring plate, the inverted conical head of the anti-misalignment guide cylinder is pressed into the flange surface to prevent rotation. The elastic anti-loosening ring is tightened against the anti-rotation ring plate and engaged with the screw to prevent loosening.
It achieves precise guidance and anti-rotation of screws on the flange surface, avoiding misalignment and loosening, and improving the stability of self-tapping locking.
Smart Images
Figure CN224093663U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to screw technical field especially relates to a cross groove flat round head flange face self -tapping locking screw. BACKGROUND
[0002] Self -tapping locking screw, it is a kind of screw that can be self -tapping into material, the screw is composed of head, stem and terminal three parts, head is flat round head shape, with cross groove, it is convenient to use screwdriver or electric screwdriver to operate, stem has self -tapping thread, its thread is usually thicker and larger pitch, can be self -tapping into material and form matching thread in installation process, without pre -threaded hole.
[0003] Based on the above, the inventor finds that the existing self-tapping locking screw has the following disadvantages:
[0004] 1. The screw tip is conical in structure, which causes the screw to be easily skewed when self-tapping and locking the flange surface. It is not convenient to add a guide measure on the screw to prevent skewing and guide the self-tapping and locking of the screw.
[0005] 2. There is no anti-rotation structure on the screw, which can easily cause the screw to rotate and loosen due to external factors. It is not convenient to add an anti-rotation measure on the screw to prevent the screw from rotating and loosening after self-tapping and locking. INVENTION CONTENTS
[0006] To solve the above technical problems, the utility model provides a cross groove flat round head flange face self-tapping locking screw to solve the problem that the screw tip is conical in structure, which causes the screw to be easily skewed when self-tapping and locking the flange surface. It is not convenient to add a guide measure on the screw to prevent skewing and guide the self-tapping and locking of the screw. There is no anti-rotation structure on the screw, which can easily cause the screw to rotate and loosen due to external factors. It is not convenient to add an anti-rotation measure on the screw to prevent the screw from rotating and loosening after self-tapping and locking.
[0007] The purpose and effect of the cross groove flat round head flange face self-tapping locking screw are achieved by the following specific technical means:
[0008] A cross groove flat round head flange face self-tapping locking screw, comprising a screw body; the screw body is provided with a skew-preventing and guiding cylinder in the up-down direction, a self-tapping thread is formed on the inner circumference of the skew-preventing and guiding cylinder, a regular hexagonal structure is formed on the outer circumference of the skew-preventing and guiding cylinder, a limiting ring plate is formed on the outer circumference of the bottom of the skew-preventing and guiding cylinder, and four inverted conical heads are arranged in an annular array on the bottom end surface of the limiting ring plate of the skew-preventing and guiding cylinder.
[0009] Further, a rotation-stopping ring plate is sleeved on the upper part of the regular hexagonal structure of the skew-preventing and guiding cylinder, a regular hexagonal hole is formed in the center of the rotation-stopping ring plate, and reverse teeth are arranged in an annular array on the top end surface of the rotation-stopping ring plate.
[0010] Further, the lower part of the hexagonal structure of the anti-inclination guide cylinder is sleeved with an elastic check ring, and the elastic check ring is in the form of a spiral opening ring plate structure.
[0011] Further, the nail rod and the reverse cone head are provided with self-tapping threads on the outer periphery.
[0012] Further, the nail rod is arranged in the middle of the bottom end surface of the flat round head, and the reverse cone head is arranged on the bottom end surface of the nail rod.
[0013] Further, the cross slot is arranged in the middle of the top of the flat round head, and the reverse teeth are arranged in the form of an annular array on the bottom end surface of the flat round head.
[0014] Further, the self-tapping screw is arranged on the top of the anti-inclination guide cylinder through screwing, and the flat round head is arranged on the top of the self-tapping screw.
[0015] Compared with the prior art, the anti-inclination guide cylinder has the following beneficial effects:
[0016] The anti-inclination guide cylinder is conveniently placed on the flange surface, the self-tapping screw is conveniently screwed into the anti-inclination guide cylinder for guidance, the self-tapping screw is screwed into the flange surface through the anti-inclination guide cylinder, and the problems that the screw end is in the form of a cone, the screw is inclined when the screw is self-tapped and locked on the flange surface, it is inconvenient to add a guide measure on the screw to prevent the screw from being inclined when the screw is self-tapped and locked, and the like are solved.
[0017] The reverse cone head of the anti-inclination guide cylinder is conveniently pressed into the flange surface through the self-tapping screw, the rotation of the anti-inclination guide cylinder is thus prevented, the self-tapping screw is embedded in the upwardly-tightened rotation-preventing annular plate through the elastic check ring, the self-tapping screw is thus prevented from rotating and loosening, and the problems that there is no rotation-preventing structure on the screw, the screw is easily rotated and loosened due to external factors, it is inconvenient to add a rotation-preventing measure on the screw to prevent the screw from being rotated and loosened after the screw is self-tapped and locked, and the like are solved. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a front view structural schematic diagram of the utility model.
[0019] Figure 2 is a bottom view structural schematic diagram of the utility model.
[0020] Figure 3 is a sectional view structural schematic diagram of the utility model.
[0021] Figure 4 is a disassembled structural schematic diagram of the utility model.
[0022] Figure 5Is the installed state schematic diagram of the utility model.
[0023] Figure 6 Is the self-tapping locking state sectional view of the utility model.
[0024] In the drawing: 1, screw body;2, anti-bending guide cylinder;3, self-tapping screw;4, elastic lock ring;5, rotation-stopping annular plate. DETAILED DESCRIPTION
[0025] The embodiment of the utility model will be described in further detail below in combination with the drawings and examples.
[0026] Example one: as shown in the accompanying Figure 1 to the accompanying Figure 6 As shown:
[0027] The utility model provides a kind of cross slot flat round head flange face self-tapping locking screw, including screw body 1;Screw body 1 is provided with the anti-bending guide cylinder 2 of up-down direction, it is convenient to carry out self-tapping locking guide to self-tapping screw 3, anti-bending guide cylinder 2 inside circumference is equipped with self-tapping thread, it is convenient for self-tapping screw 3 to spin into inside, anti-bending guide cylinder 2 outside circumference is provided with regular hexagon structure, it is convenient to stop rotation annular plate 5 and stop, anti-bending guide cylinder 2 bottom outside circumference is provided with limit ring plate, it is convenient to limit elastic lock ring 4, the limit ring plate bottom end surface annular array of anti-bending guide cylinder 2 is provided with four inverted conical heads, it is convenient to penetrate into flange face inside and stop rotation.
[0028] Among them, anti-bending guide cylinder 2 inside top is equipped with self-tapping screw 3 by thread, it is convenient for self-tapping screw 3 to attack into flange face inside by the guide of anti-bending guide cylinder 2, self-tapping screw 3 top is provided with flat round head downwards, it is convenient to press anti-bending guide cylinder 2 on flange face, the flat round head top middle of self-tapping screw 3 is equipped with cross slot, it is convenient for self-tapping screw 3 to be operated by screwdriver or electric screwdriver, the flat round head bottom end surface periphery annular array of self-tapping screw 3 is provided with reverse tooth, it is convenient to be mutually embedded with the reverse tooth of rotation-stopping annular plate 5, prevent self-tapping screw 3 reverse loosening, the flat round head bottom end surface middle of self-tapping screw 3 is provided with nail rod, it is convenient to enter flange face inside, the flat round head bottom end surface of self-tapping screw 3 is provided with inverted conical head, it is convenient to break flange face, the nail rod and inverted conical head outside circumference of self-tapping screw 3 are all provided with self-tapping thread, it is convenient for self-tapping screw 3 to attack into flange face inside.
[0029] The elastic anti-loosening ring 4 is sleeved on the lower part of the regular hexagonal structure of the anti-skew guiding cylinder 2, the elastic anti-loosening ring 4 is kept in an upward pressing state by the elastic anti-loosening ring 4, the elastic anti-loosening ring 4 is in a spiral opening ring plate structure, the elastic anti-loosening ring 4 is elastic, the anti-skew guiding cylinder 2 is sleeved on the upper part of the regular hexagonal structure of the anti-skew guiding cylinder 2, the anti-skew guiding cylinder 2 is only allowed to move up and down, and cannot rotate, the anti-skew guiding cylinder 2 is inserted into the regular hexagonal hole, the anti-skew guiding cylinder 2 is in the regular hexagonal structure, the anti-skew guiding cylinder 2 is in the regular hexagonal structure, and the anti-skew guiding cylinder 2 is in the regular hexagonal structure.
[0030] The specific use mode and action of the embodiment are as follows:
[0031] In the utility model, as shown in the figure, Figure 1 The screw body 1 is in a storage state, at this time, the self-tapping screw 3 is screwed into the inside of the anti-skew guiding cylinder 2, thereby preventing the phenomenon that each part of the screw body 1 is scattered and lost, and the screw body 1 can be directly taken when used, as shown in the figure, Figure 1 When the screw body 1 is installed on the flange surface, the anti-skew guiding cylinder 2 is in contact with the flange surface through the four inverted conical heads at the bottom, as shown in the figure, Figure 5 The anti-skew guiding cylinder 2, the elastic anti-loosening ring 4 and the anti-rotation ring plate 5 are pinched and forced downward, the anti-skew guiding cylinder 2 is pressed on the flange surface and kept stationary, the self-tapping screw 3 is screwed into the inside of the flange surface by rotating the self-tapping screw 3 with a screwdriver, the inside of the anti-skew guiding cylinder 2 provides accurate guidance for the self-tapping screw 3, the problem that the screw is easy to be skewed when the screw is self-tapping and locked on the flange surface is solved, and the problem that the screw is easy to be skewed when the screw is self-tapping and locked on the flange surface is solved, Figure 6As shown, at this time, the self-tapping screw 3 will press the rounded cone head of the anti-bending guide cylinder 2 into the flange surface, thereby achieving the rotation stop of the anti-bending guide cylinder 2, and at the same time, the self-tapping screw 3 exerts pressure on the elastic lock ring 4 through the rotation stop ring plate 5, so that the elastic lock ring 4 is compressed and stored, thereby the elastic lock ring 4 exerts a reaction force to make the rotation stop ring plate 5 tightly press the flat round head of the self-tapping screw 3, and the reverse stop teeth of the self-tapping screw 3 and the rotation stop ring plate 5 are embedded with each other, thereby the anti-bending guide cylinder 2 stops the rotation of the rotation stop ring plate 5, and the rotation stop ring plate 5 reversely stops the rotation of the self-tapping screw 3, thereby preventing the self-tapping screw 3 from loosening in reverse rotation, solving the problem that there is no rotation stop structure on the screw, which is easy to cause the screw to loosen due to external factors. It should be noted that when the self-tapping screw 3 is screwed into the flange surface, after the reverse stop teeth of the self-tapping screw 3 contact the reverse stop teeth of the rotation stop ring plate 5, the rotation stop ring plate 5 will move downward due to the force on the reverse stop tooth slope, thereby allowing the reverse stop teeth of the self-tapping screw 3 to rotate and slide on the reverse stop teeth of the rotation stop ring plate 5. Conversely, when the self-tapping screw 3 is reversed, the vertical surface of the reverse stop teeth of the rotation stop ring plate 5 is forced to be locked, so that the self-tapping screw 3 cannot be reversed.
[0032] Example two: The difference between example one and example two is that the surface of the elastic lock ring 4 can also be provided with a corrosion-resistant layer, thereby increasing the corrosion resistance of the elastic lock ring 4, thereby prolonging the service life of the elastic lock ring 4 and ensuring the upward locking of the rotation stop ring plate 5.
[0033] Example three: The difference between example one and example three is that the outer circumferential surface of the rotation stop ring plate 5 can also be provided with a frosted surface, thereby increasing the friction between the outer circumferential surface of the rotation stop ring plate 5 and the fingers, making it easier to press the anti-bending guide cylinder 2 on the material to be tapped by the fingers.
Claims
1. A cross-grooved flat round head flange self-tapping locking screw, characterized in that: Includes a screw body (1); the screw body (1) is provided with an anti-misalignment guide cylinder (2) in the up and down direction, the anti-misalignment guide cylinder (2) has a self-tapping thread on the inner circumference, the anti-misalignment guide cylinder (2) has a regular hexagonal structure on the outer circumference, the bottom outer circumference of the anti-misalignment guide cylinder (2) is provided with a limiting ring plate, and the bottom end face of the limiting ring plate of the anti-misalignment guide cylinder (2) is provided with four inverted conical heads in an annular array.
2. The cross-grooved flat round head flange self-tapping locking screw as described in claim 1, characterized in that: The anti-tilting guide cylinder (2) has a self-tapping screw (3) installed inside the top by a thread, and the top of the self-tapping screw (3) has a flat round head with the plane facing downward.
3. The cross-grooved flat round head flange self-tapping locking screw as described in claim 2, characterized in that: The self-tapping screw (3) has a cross groove in the middle of the top of the flat round head, and a reverse stop tooth is arranged in a ring array around the bottom end face of the flat round head.
4. The cross-grooved flat round head flange self-tapping locking screw as described in claim 3, characterized in that: The self-tapping screw (3) has a shank in the middle of the bottom end face of the flat round head, and the bottom end face of the shank of the self-tapping screw (3) has an inverted conical head.
5. The cross-grooved flat round head flange self-tapping locking screw as described in claim 4, characterized in that: The self-tapping screw (3) has self-tapping threads on both the shank and the outer circumference of the inverted conical head.
6. The cross-grooved flat round head flange self-tapping locking screw as described in claim 2, characterized in that: The lower part of the hexagonal structure of the anti-tilting guide cylinder (2) is fitted with an elastic anti-loosening ring (4), which is a spiral open ring plate structure.
7. The cross-grooved flat round head flange self-tapping locking screw as described in claim 6, characterized in that: The anti-tilt guide tube (2) has a regular hexagonal structure with an anti-rotation annular plate (5) on the upper part. The anti-rotation annular plate (5) has a regular hexagonal hole that runs through the top and bottom. The top end face of the anti-rotation annular plate (5) is provided with a ring array of anti-reverse teeth.