A screw that prevents loosening

Abstract

The invention discloses a screw capable of preventing loosening, comprising a nut, wherein a rotating shaft is arranged inside the nut, an arc groove is arranged at the upper end, a screw rod is arranged at the lower end, a cross groove is arranged at the upper end of the rotating shaft, and an anti-loosening mechanism is arranged in the middle of the screw rod. The invention arranges the anti-loosening mechanism inside the screw rod of the screw, and arranges the rotating shaft at the center of the screw rod, and utilizes a semicircular protrusion on the rotating shaft to push a slider in the anti-loosening mechanism outward to clamp the thread, and adds a certain elasticity to the anti-loosening mechanism through a spring sheet with a certain deformation function, thereby preventing the screw from loosening while avoiding damage to the external thread, and the installed screw can be tightened at any time through the embedded rotating shaft, the method of use is simple, the effect is remarkable, and it has great market promotion value.

Description

Technical Field

[0001] The invention relates to the field of fasteners, in particular to a screw capable of preventing loosening. Background Art

[0002] Screws are tools that use the physics and mathematical principles of the circular rotation of the inclined surface of an object and the friction force to gradually tighten objects and parts. Screws are indispensable industrial necessities in daily life and have important tasks in industry. When ordinary screws work under vibration load conditions, due to the radial clearance of the external thread movement, it is easy to overcome the locking force on the thread contact surface and produce self-loosening rotation and loosening. Loose nuts often cause serious accidents. At present, the known screws will loosen after being tightened due to thermal expansion and contraction or vibration for a long time. Especially in some important places, once the screws are loose, it will cause immeasurable losses. Therefore, there is an urgent need for a screw that can prevent loosening. Summary of the invention

[0003] In order to solve the above-mentioned technical problems, the present invention provides a screw that can prevent loosening. The technical solution of the present invention is implemented as follows:

[0004] A screw that can prevent loosening comprises a nut, a rotating shaft is arranged inside the nut, an arc groove is arranged at the upper end, and a screw rod is arranged at the lower end, a cross groove is arranged at the upper end of the rotating shaft, an arc spring sheet is arranged on the outer side of the upper end, a limiting slider is arranged at the bottom, and a semicircular protrusion is arranged in the middle, a limiting groove is arranged at the lower end of the screw rod, and an anti-loosening mechanism is arranged in the middle, the anti-loosening mechanism comprises a top block, a spring sheet, a limiting ring and a slider, a plurality of triangular clamping blocks are arranged on one side of the top block, a circular limiting groove is arranged on one side of the slider, the spring sheet is integrated with the slider, the slider is gap-connected with the limiting ring, and the nut is an external hexagonal nut.

[0005] The limit sliding blocks are symmetrically arranged on both sides of the bottom of the rotating shaft.

[0006] The height of the arc-shaped groove is higher than the thickness of the arc-shaped spring sheet.

[0007] The maximum deformation angle of the arc-shaped spring piece is ∠23°.

[0008] The deformation angle range of the spring sheet is within ∠10°.

[0009] The top block is integrated with the spring sheet and the triangular clamping block.

[0010] Beneficial Effects

[0011] The present invention provides an anti-loosening mechanism inside the screw rod of the screw, and at the same time provides a rotating shaft at the center of the screw, and utilizes a semicircular protrusion on the rotating shaft to push a sliding block in the anti-loosening mechanism outward to clamp the thread, and uses a spring sheet with a certain deformation function to add a certain elasticity to the anti-loosening mechanism, thereby preventing the screw from loosening while avoiding damage to the external thread, and the installed screw can be tightened at any time through the embedded rotating shaft, and the engagement of the semicircular protrusion and the circular limiting groove makes it difficult for the top block of the anti-loosening mechanism to be squeezed back. The present invention has a simple method of use, significant effect, and great market promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is one of the structural schematic diagrams of the present invention.

[0013] Figure 2 This is the second structural schematic diagram of the present invention.

[0014] Figure 3 It is a schematic diagram of the nut structure of the present invention.

[0015] Figure 4 It is a schematic diagram of the screw structure of the present invention.

[0016] Figure 5 It is a structural schematic diagram of the anti-loosening mechanism of the present invention.

[0017] 1- nut; 2- rotating shaft; 3- arc groove; 4- screw rod; 5- cross groove; 6- arc spring sheet; 7- limit slider; 8- semicircular protrusion; 9- limit groove; 10- anti-loosening mechanism; 11- top block; 12- spring sheet; 13- limit ring; 14- slider; 15- triangular block; 16- circular limit groove. DETAILED DESCRIPTION

[0018] like Figure 1—5 shows a screw capable of preventing loosening, comprising a nut, wherein a rotating shaft is arranged inside the nut, an arc groove is arranged at the upper end, and a screw rod is arranged at the lower end. Through the arc groove, the rotating shaft can drive the nut to rotate while rotating in a clockwise direction, so that the screw rod is inserted into the threaded hole. A cross groove is arranged at the upper end of the rotating shaft, and an arc spring sheet is arranged at the outer side of the upper end. The rotating shaft drives the nut to rotate through the arranged arc spring sheet. A limiting slider is arranged at the bottom. The limiting slider can fix the rotating shaft on a horizontal plane for rotation without up and down displacement, and at the same time make the rotating shaft fit more closely with the inside of the screw rod. A semicircular protrusion is arranged in the middle, which plays the role of squeezing and pushing the slider. A limiting groove is arranged at the lower end of the screw, and an anti-loosening mechanism is arranged in the middle. The mechanism includes a top block, a spring sheet, a limiting ring and a slider. The top block is pushed outward by the semicircular protrusion on the rotating shaft contacting and pushing the slider to achieve the effect of clamping the screw. A number of triangular clamping blocks are arranged on one side of the top block. The shape of the triangular clamping blocks is more in line with the external thread, which can prevent the screw from loosening and can also engage with the external thread to prevent the external thread from being damaged. A circular limiting groove is arranged on one side of the slider. The spring sheet is integrated with the slider. The spring sheet gives the top block an elastic function, so that the top block has a certain buffering performance and elasticity for the extrusion of the external thread, so that the external thread is not easily damaged. The slider is gap-connected with the limiting ring. The nut is an external hexagonal nut. The external hexagonal nut can be twisted with the external hexagonal basis, or it can be twisted by aligning a screwdriver with the cross slot, and the scope of application is wider.

[0019] The limit blocks are symmetrically arranged on both sides of the bottom of the rotating shaft, and the limit blocks play a role in fixing the rotating position of the rotating shaft so that it is not easy to separate from the screw.

[0020] The height of the arc-shaped groove is higher than the thickness of the arc-shaped spring piece, so as to prevent the arc-shaped spring piece from being easily deformed outwards due to twisting with excessive force.

[0021] The maximum deformation angle of the arc-shaped spring piece is ∠23°, so that the arc-shaped spring piece fully contacts the arc-shaped groove, and is more stable when the nut is rotated.

[0022] The deformation angle range of the spring sheet is within ∠10°, which limits the elastic range of the deformation angle of the top block, thereby preventing the screw from loosening and damaging the external thread.

[0023] The top block is integrated with the spring sheet and the triangular clamping block.

[0024] Embodiment 1

[0025] The present invention discloses a screw capable of preventing loosening, comprising a nut, wherein a rotating shaft is arranged inside the nut, an arc groove is arranged at the upper end, and a screw rod is arranged at the lower end; a cross groove is arranged at the upper end of the rotating shaft, an arc spring sheet is arranged at the outer side of the upper end, a limiting slider is arranged at the bottom, and a semicircular protrusion is arranged in the middle; a limiting groove is arranged at the lower end inside the screw rod, and an anti-loosening mechanism is arranged in the middle; the anti-loosening mechanism comprises a top block, a spring sheet, a limiting ring and a slider; a plurality of triangular clamping blocks are arranged on one side of the top block, and a circular limiting groove is arranged on one side of the slider; the spring sheet is integrated with the slider, the top block is integrated with the spring sheet and the triangular clamping block, the slider is gap-connected with the limiting ring, and the nut is an external hexagonal nut.

[0026] The working process of tightening screws by stacking screws through the anti-loosening mechanism of the present invention is as follows:

[0027] Align the screw with the threaded hole, use a screwdriver to align it with the cross slot, and twist it clockwise. At this time, the arc spring sheet will deform and engage with the arc slot, driving the nut to rotate clockwise until the nut is close to the plane around the threaded hole, and use a hexagonal tool to twist the nut to achieve the effect of re-tightening, and then use a screwdriver to align it with the cross slot and rotate it counterclockwise. At this time, the rotating shaft rotates alone until the semicircular protrusion contacts the circular limiting groove. The semicircular protrusion is restricted in the circular limiting groove, pushing the slider to move outward while preventing the rotating shaft from rotating easily. The triangular block on one side of the top block contacts the external thread to achieve a fixing effect. The spring sheet can protect the external thread from being damaged by excessive pressure. When the triangular block is fixed, the final tightening process of the screw is completed.

[0028] Embodiment 2

[0029] The present invention discloses a screw capable of preventing loosening, comprising a nut, wherein a rotating shaft is arranged inside the nut, an arc groove is arranged at the upper end, and a screw rod is arranged at the lower end; a cross groove is arranged at the upper end of the rotating shaft, an arc spring sheet is arranged at the outer side of the upper end, a limiting slider is arranged at the bottom, and a semicircular protrusion is arranged in the middle; a limiting groove is arranged at the lower end inside the screw rod, and an anti-loosening mechanism is arranged in the middle; the anti-loosening mechanism comprises a top block, a spring sheet, a limiting ring and a slider; a plurality of triangular clamping blocks are arranged on one side of the top block, and a circular limiting groove is arranged on one side of the slider; the spring sheet is integrated with the slider, the top block is integrated with the spring sheet and the triangular clamping block, the slider is gap-connected with the limiting ring, and the nut is an external hexagonal nut.

[0030] The working process of the fastening action of the matching nut of the present invention is as follows:

[0031] Align the screw with the threaded hole, use a screwdriver to align it with the cross slot, and twist it clockwise. At this time, the arc spring sheet will deform and engage with the arc slot, driving the nut to rotate clockwise until the nut is close to the plane around the threaded hole, and use a hexagonal tool to twist the nut to achieve the effect of re-tightening. Put the nut on the bottom of the screw, tighten the nut, and then use a screwdriver to align it with the cross slot and rotate it counterclockwise. At this time, the rotating shaft rotates alone until the semicircular protrusion contacts the circular limiting groove. The semicircular protrusion is restricted in the circular limiting groove, pushing the slider to move outward while preventing the rotating shaft from rotating easily. The triangular block on one side of the top block contacts the external thread to achieve a fixing effect. The spring sheet can protect the external thread from being damaged by excessive pressure. When the triangular block is fixed, the final tightening process of the screw is completed.

Claims

1. A screw capable of preventing loosening, characterized in that: It includes a nut, a rotating shaft is arranged inside the nut, an arc groove is arranged at the upper end, a screw rod is arranged at the lower end, a cross groove is arranged at the upper end of the rotating shaft, an arc spring sheet is arranged on the outer side of the upper end, a limited position slider is arranged at the bottom, a semicircular convex block is arranged in the middle, a limited position groove is arranged at the lower end of the screw rod, an anti-loosening mechanism is arranged in the middle, the anti-loosening mechanism includes a top block, a spring sheet, a limiting ring and a slider, a triangular clamping block is arranged on one side of the top block, a circular limiting groove is arranged on one side of the slider, the spring sheet is integrated with the slider, the slider is gap-connected with the limiting ring, and the nut is an external hexagonal nut; The height of the arc-shaped groove is higher than the thickness of the arc-shaped spring sheet.

2. A screw capable of preventing loosening according to claim 1, characterized in that: The limit sliding blocks are symmetrically arranged on both sides of the bottom of the rotating shaft.

3. A screw capable of preventing loosening according to claim 1, characterized in that: The deformation angle of the arc-shaped spring piece is ∠23°.

4. A screw capable of preventing loosening according to claim 1, characterized in that: The top block is integrated with the spring sheet and the triangular clamping block.

5. The screw capable of preventing loosening according to claim 1, characterized in that: The semicircular projection is integrated with the rotating shaft.

6. The screw capable of preventing loosening according to claim 1, characterized in that: The limiting ring is a square limiting ring.

7. The screw capable of preventing loosening according to claim 1, characterized in that: The diameter of the middle opening inside the screw is larger than the diameter of the upper opening.

8. The screw capable of preventing loosening according to claim 1, characterized in that: The rotating shaft is gap-connected with the interior of the screw.

9. The screw capable of preventing loosening according to claim 1, characterized in that: The anti-loosening mechanism is symmetrically arranged on both sides of the screw rod.

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