CN220816230U - Screw capable of being loosened and not loosened - Google Patents
Screw capable of being loosened and not loosened Download PDFInfo
- Publication number
- CN220816230U CN220816230U CN202322618175.6U CN202322618175U CN220816230U CN 220816230 U CN220816230 U CN 220816230U CN 202322618175 U CN202322618175 U CN 202322618175U CN 220816230 U CN220816230 U CN 220816230U
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- screw
- half section
- gasket
- upper half
- spring
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- 238000000034 method Methods 0.000 claims description 2
- 230000002265 prevention Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a loosening-preventing screw, which comprises an integrated structure formed by a screw cap and a screw rod, wherein the screw cap is cylindrical, a screw driver hole for driving the screw cap to rotate is arranged in the center of the upper part, and strip-shaped anti-slip teeth are arranged on the outer wall of the side face; the upper half section of the screw rod is a polished rod, threads are arranged on the outer side of the lower half section, the outer diameter of the lower half section is larger than that of the upper half section, and a clamping spring is arranged at the joint of the lower half section and the upper half section; the upper half section of the screw rod is sleeved with an annular gasket, a spring sleeved on the upper half section of the screw rod is arranged between the gasket and the clamp spring, and a limiting sleeve is sleeved between the gasket and the clamp spring. The utility model can control the maximum pretightening force which can be achieved by loosening the screw without loosening, so that the fixed plate is not damaged by the excessive pretightening force, the limit sleeve can also be used as a reference, the screwing depth of the screw is used as a reference object in adjustment, and the pretightening force is adjusted more finely; the screw cap is provided with a screw driver hole and anti-slip teeth at the same time, so that the screw rod can be conveniently and rapidly rotated.
Description
Technical Field
The utility model belongs to the technical field of springs, and particularly relates to a screw loosening preventing device.
Background
The loosening prevention screw is fixed on the mounting plate in a riveting or expansion riveting mode, the positions of the plates are fastened through screws, the existing loosening prevention screw is simpler in design, the plates are fastened through screws, under the condition that riveting is performed through springs, the problem that the springs are too tightly regulated and the pretightening force is not fine is easily caused, and particularly, under the condition that pretightening force range between some plates is high, the common loosening prevention screw is difficult to regulate to proper pretightening force.
Disclosure of utility model
The utility model aims to solve the problems that the screw is not loosened, and the problems that the spring is excessively tightly regulated and the pretightening force is not finely regulated are solved by adding the design of the limiting sleeve and the gasket.
The utility model is realized by the following technical scheme:
The screw loosening preventing structure comprises an integral structure consisting of a screw cap and a screw rod; the method is characterized in that: the screw cap is cylindrical, a screw driver hole for driving the screw cap to rotate is formed in the center of the upper part, and strip-shaped anti-slip teeth are formed on the outer wall of the side face; the upper half section of the screw rod is a polished rod, threads are arranged on the outer side of the lower half section, the outer diameter of the lower half section is larger than that of the upper half section, and a clamping spring is arranged at the joint of the lower half section and the upper half section; an annular gasket is sleeved on the upper half section of the screw rod, a spring sleeved on the upper half section of the screw rod is arranged between the gasket and the clamp spring, and a limiting sleeve is sleeved between the gasket and the clamp spring; the internal diameter of the limiting sleeve is larger than the external diameter of the spring, but smaller than the external diameters of the gasket and the snap spring.
Further, the screw driver hole is in an inner hexagon shape.
Further, the gasket is an anti-slip elastic gasket.
Further, the outer side face of the limiting sleeve is round and provided with a plane notch.
Further, a chamfer is arranged on the outer edge of the upper edge of the nut.
Further, a chamfer is arranged on the outer edge of the lower edge of the limiting sleeve.
The beneficial effects of the utility model are as follows: the limiting sleeve and the gasket are arranged between the springs, so that the maximum pretightening force achieved by loosening the screws can be controlled, the fixed plate is not damaged due to the excessive pretightening force, the limiting sleeve can also be used as a reference, the screwing depth of the screw is used as a reference object in adjustment, and the pretightening force is adjusted more finely; the screw cap is simultaneously provided with a screw driver hole and anti-slip teeth, so that the screw rod can be conveniently and rapidly rotated; the design of jump ring convenient to detach stop collar and gasket, convenient change suitable stop collar and gasket.
Drawings
Fig. 1 is a perspective view of the present utility model.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a front view of fig. 1.
Fig. 4 is a side view of fig. 1.
In the figure, 1, a nut, 2, a screw rod, 3, a limit sleeve, 4, a gasket, 5, a clamp spring, 11, a screwdriver hole, 12, an anti-slip tooth, 21, a thread, 31 and a plane notch.
Detailed Description
The utility model is further described below with reference to specific examples and figures.
As shown in fig. 1-4, the screw loosening preventing device comprises an integral structure consisting of a nut 1 and a screw 2; the screw cap 1 is cylindrical, a screw driver hole 11 for driving the screw cap to rotate is formed in the center of the upper portion, the screw driver hole 11 is in an inner hexagonal shape, and strip-shaped anti-slip teeth 12 are formed in the outer wall of the side face of the screw cap 1. The upper half section of the screw rod 2 is a polished rod, threads 21 are arranged on the outer side of the lower half section, the outer diameter of the lower half section is larger than that of the upper half section, and a clamping spring 5 is arranged at the joint of the lower half section and the upper half section; an annular gasket 4 is sleeved on the upper half section of the screw rod 2, the gasket 4 is an anti-skid elastic gasket, a spring (the spring is not shown in the figure) sleeved on the upper half section of the screw rod 2 is arranged between the gasket 4 and the clamp spring 5, and a limit sleeve 3 is sleeved between the gasket 4 and the clamp spring 5; the inner diameter of the limit sleeve 3 is larger than the outer diameter of the spring, but smaller than the outer diameters of the gasket 4 and the clamp spring 5, and the outer side surface of the limit sleeve 3 is circular and provided with a plane notch 31.
The outer edge of the upper edge of the nut 1 is provided with a chamfer.
And a chamfer is arranged on the outer edge of the lower edge of the limit sleeve 3.
The existing screw loosening prevention device is simple in design, can only be used for connecting a plurality of plates with low requirements on the pretightening force range under the condition of riveting through a spring, is inconvenient to adjust due to the compression amount of the spring, is easy to cause the spring to be too tightly adjusted, and is not fine in pretightening force adjustment. Under the condition that the pretightening force range between some plates is high in requirement, even if the plates are easy to damage due to excessive pretightening force, common loosening-preventing screws are not applicable any more, and the loosening-preventing screws are designed to solve the problems. The utility model can select the type of the spring when testing the sample plate, and determine the proper height of the limit sleeve 3 and the thickness of the gasket 4 for batch use. When the screw cap is used, the gasket 4 is sleeved into the upper half section of the screw rod 2, then the spring and the limit sleeve 3 are sleeved, finally the clamp spring 5 is clamped, the loose screw is screwed into a plate to be fixed, the anti-slip teeth 12 on the screw cap 1 can be used for rapidly rotating the screw cap 1, for plates with small screwing force, fingers can directly grasp the anti-slip teeth 12 to rotate, when the screwing force is needed to be large, a screw driver can be used for inserting the screw driver hole 11 to rotate the screw cap 1, and the maximum pretightening force which can be achieved by the loose screw can be controlled due to the limit sleeve 3 and the limit gasket 4, so that the plate to be fixed cannot be damaged due to the excessive pretightening force, the limit sleeve 3 can also be used as a reference, and the screwing depth of the screw rod 2 is used as a reference object in adjustment, and pretightening force adjustment is finer. The plane notch 31 on the stop collar 3 is convenient for controlling the stop collar 3 not to rotate.
The above examples are only preferred embodiments of the present utility model, and are intended to be illustrative of the present utility model, and not limiting, and any changes, substitutions, combinations, simplifications, modifications, etc. which would be made by those skilled in the art without departing from the spirit and principles of the present utility model should be considered equivalent thereto, and are intended to be included in the scope of the present utility model.
Claims (6)
1. The screw loosening preventing structure comprises an integral structure consisting of a screw cap and a screw rod; the method is characterized in that: the screw cap is cylindrical, a screw driver hole for driving the screw cap to rotate is formed in the center of the upper part, and strip-shaped anti-slip teeth are formed on the outer wall of the side face; the upper half section of the screw rod is a polished rod, threads are arranged on the outer side of the lower half section, the outer diameter of the lower half section is larger than that of the upper half section, and a clamping spring is arranged at the joint of the lower half section and the upper half section; an annular gasket is sleeved on the upper half section of the screw rod, a spring sleeved on the upper half section of the screw rod is arranged between the gasket and the clamp spring, and a limiting sleeve is sleeved between the gasket and the clamp spring; the internal diameter of the limiting sleeve is larger than the external diameter of the spring, but smaller than the external diameters of the gasket and the snap spring.
2. The non-unthreading screw according to claim 1, wherein: the screw driver hole is in an inner hexagon shape.
3. The non-unthreading screw according to claim 1, wherein: the gasket is an anti-skid elastic gasket.
4. The non-unthreading screw according to claim 1, wherein: the outer side face of the limiting sleeve is round and provided with a plane notch.
5. The non-unthreading screw according to claim 1, wherein: and a chamfer is arranged on the outer edge of the upper edge of the nut.
6. The non-unthreading screw according to claim 1, wherein: and a chamfer is arranged on the outer edge of the lower edge of the limit sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322618175.6U CN220816230U (en) | 2023-09-25 | 2023-09-25 | Screw capable of being loosened and not loosened |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322618175.6U CN220816230U (en) | 2023-09-25 | 2023-09-25 | Screw capable of being loosened and not loosened |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220816230U true CN220816230U (en) | 2024-04-19 |
Family
ID=90679690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322618175.6U Active CN220816230U (en) | 2023-09-25 | 2023-09-25 | Screw capable of being loosened and not loosened |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220816230U (en) |
-
2023
- 2023-09-25 CN CN202322618175.6U patent/CN220816230U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |