CN209510850U - A kind of looseness prevention self-tapping screw - Google Patents
A kind of looseness prevention self-tapping screw Download PDFInfo
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- CN209510850U CN209510850U CN201822191465.6U CN201822191465U CN209510850U CN 209510850 U CN209510850 U CN 209510850U CN 201822191465 U CN201822191465 U CN 201822191465U CN 209510850 U CN209510850 U CN 209510850U
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Abstract
The utility model discloses a kind of looseness prevention self-tapping screws, it is related to screw field, it is mounted on product, including screw head, spiral shell body and spiral shell tail, the setting of spiral shell tail is in tip, spiral shell body is disposed with the first thread segment from screw head to spiral shell tail, second thread segment, smooth section and third thread segment, the outer diameters such as the first thread segment and the second thread segment, the first self tapping thread is continuously fixedly connected on first thread segment and the second thread segment, fluting thread is also fixedly connected on second thread segment, first self tapping thread is communicated with the screw pitch of fluting thread with lead angle, start angle is different, fluting thread is for opening up liquid tank, liquid tank is opened on product；Through injection hole is offered in screw head, injection hole is connected to liquid tank.First self tapping thread tap out slot, while thread of slotting opens up out liquid tank between the thread groove of the first self tapping thread tapping, work people injects the glue of liquid condition by injection hole into liquid tank, so that looseness prevention self-tapping screw is not easy to loosen.
Description
Technical field
The utility model relates to tapping screw fields, more particularly, to a kind of looseness prevention self-tapping screw.
Background technique
Tapping screw or fast tooth screw are fast-assembling fastener of the steel through surface Zincing passivation.When connection, first to quilt
Connector produces thread Pilot hole, then tapping screw is screwed into the thread Pilot hole of connected piece.
A kind of Multi-head screw as disclosed in the Chinese patent of Publication No. CN102777464A, including screw terminal and screw
Bar, screw terminal are fixedly connected in screw rod, and oblique helicitic texture is offered in screw rod.
It is had a problem that in above-mentioned patent, screw is connected on wooden or plastic cement products frequently as fastener threads, long
Phase, if things go on like this, screw can slowly be rotated along the thread lines of itself by far from wood-based product or plastic cement products,
Product is to the last detached, causes each component connection unstable, it is possible to cause safety accident.
Utility model content
In view of the above problems, the object of the present invention is to provide a kind of looseness prevention self-tapping screw, has and be not easy to loosen
Effect.
The above-mentioned purpose of utility model of the utility model has the technical scheme that
A kind of looseness prevention self-tapping screw, is mounted on product, including screw head, spiral shell body and spiral shell tail, and the spiral shell tail setting is in tip,
The spiral shell body is disposed with the first thread segment, the second thread segment, smooth section and third thread segment from screw head to spiral shell tail, and described
The outer diameters such as one thread segment and second thread segment, and the outer diameter of first thread segment and second thread segment is all larger than institute
State third thread segment；
Continuously it is fixedly connected with the first self tapping thread on first thread segment and second thread segment, described second
Fluting thread, the first self tapping thread and fluting thread screw pitch having the same and spiral shell are also fixedly connected on thread segment
Line lift angle, the first self tapping thread is different from the fluting start angle of thread, and the fluting thread is for opening up liquid
Slot, the liquid tank are opened on the product；
Through injection hole is offered in the screw head, the injection hole is connected to the liquid tank.
By using above-mentioned technical proposal, the second thread segment can by the screw hole further expansion that third thread segment drills out,
One self tapping thread tap out slot, while thread of slotting opens up out liquid tank between the thread groove of the first self tapping thread tapping,
When looseness prevention self-tapping screw is fully installed in product, work people injects the glue of liquid condition by injection hole, and glue passes through
Injection hole is injected into liquid tank, to achieve the effect that firmly install, so that looseness prevention self-tapping screw is not easy to loosen.
It is further: stomata to be offered in the screw head, the stomata is connected to the liquid tank, and second thread segment is opened
Equipped with injection slot, the injection slot is connected to the injection hole.
By using above-mentioned technical proposal, when staff injects glue from injection hole, glue is reached by injection slot
Second thread segment, and gas is discharged by stomata, until glue fills up stomata, so that staff injects glue and more accelerates
Speed withouts waiting for glue and voluntarily penetrates into.
Further: the third thread segment offers the second self tapping thread, and the outer diameter of the smooth section is greater than described the
The outer diameter of two self tapping threads.
By using above-mentioned technical proposal, so that smooth section can expand the hole that third thread segment opens up out when entering product
Hole squeezes so that the thread groove that the second self tapping thread opens up out is shunk, therefore the second self tapping thread is not easy to rotate into it again
Before in the thread groove that opens up out, therefore tapping screw is not easy to loosen.
It is further: the coarse setting in the outer surface of the looseness prevention self-tapping screw.
By using above-mentioned technical proposal, enable the first thread segment and the more stable adhesive glue of the second thread segment
Water.
Further: second thread segment offers transition chamfering close to one end of the smooth section.
By using above-mentioned technical proposal, the transition chamfering is convenient for the second thread segment hole for opening up out third thread segment
It further expands in hole.
It is further: incremental thread, the incremental thread and the second self tapping thread are fixedly connected on the spiral shell tail
Be connected and screw pitch having the same and lead angle, the size of the incremental thread from the spiral shell tail to the third thread segment by
It is cumulative big.
By using above-mentioned technical proposal, so that looseness prevention self-tapping screw is more laborsaving when deep drilling into product.
Further: the looseness prevention self-tapping screw surface is coated with rust-proof coating.
By using above-mentioned technical proposal, so that looseness prevention self-tapping screw is not easy to get rusty, reduce screw because corrosion causes to break
Split the probability to fall off.
Further: first thread segment is fixedly connected with expansion arc, the expansion arc close to one end of the screw head
Outer diameter be greater than first thread segment outer diameter and be less than the screw head outer diameter.
By using above-mentioned technical proposal, expansion arc can further push against product and screw is made to be not easy to loosen.
In conclusion the advantageous effects of the utility model include:
(1) second thread segment can be by the screw hole further expansion that third thread segment drills out, the first self tapping thread tap out
Slot, while thread of slotting opens up out liquid tank between the thread groove of the first self tapping thread tapping, when looseness prevention self-tapping screw is complete
When installing in product, work people injects the glue of liquid condition by injection hole, and glue is injected into liquid tank by injection hole
It is interior, to achieve the effect that firmly install, so that looseness prevention self-tapping screw is not easy to loosen；
(2) by setting injection slot and stomata, when staff injects glue from injection hole, glue is arrived by injecting slot
It is discharged up to the second thread segment, and by gas by stomata, until glue fills up stomata, so that staff injects glue and more accelerates
Speed withouts waiting for glue and voluntarily penetrates into.
Detailed description of the invention
Fig. 1 is the overall schematic of the utility model one embodiment；
Fig. 2 is that one embodiment of the utility model shows the schematic diagram of injection slot；
Fig. 3 is that one embodiment of the utility model shows the cross-sectional view of liquid tank；
Fig. 4 is that one embodiment of the utility model shows the schematic diagram of rust-proof coating.
Appended drawing reference: 1, product；2, screw head；3, spiral shell body；4, spiral shell tail；5, the first thread segment；6, the second thread segment；7, smooth
Section；8, third thread segment；9, the first self tapping thread；10, fluting thread；11, liquid tank；12, injection hole；13, stomata；14, it infuses
Enter slot；15, expansion arc；16, transition chamfering；17, the second self tapping thread；18, it is incremented by thread；19, rust-proof coating.
Specific embodiment
With reference to the accompanying drawings and examples, the utility model is described in detail.
A kind of looseness prevention self-tapping screw is mounted on product 1 as shown in figures 1 and 3, including screw head 2, spiral shell body 3 and spiral shell tail 4,
The setting of spiral shell tail 4 is in tip, and spiral shell body 3 is provided with the first thread segment 5, the second thread segment 6, smooth section 7 and the from screw head 2 to spiral shell tail 4
Three thread segments 8.First thread segment 5 and the second thread segment 6 are the cylindrical section of equal outer diameters, on the first thread segment 5 and the second thread segment 6
It is fixedly connected with continuous first self tapping thread 9, fluting thread 10, the first self tapping thread 9 are fixedly connected on the second thread segment 6
There are identical screw pitch and lead angle with fluting thread 10, but the start angle of the first self tapping thread 9 and fluting thread 10 is not
Together.
After tapping screw screws in product 1, the first self tapping thread 9 meeting tap out slot, while thread 10 of slotting can be in spiral shell
The gap of groove opens up out liquid tank 11.
As depicted in figs. 1 and 2, through the injection hole 12 and stomata 13 for offering circular hole in screw head 2, injection hole 12 is gentle
Hole 13 is connected to liquid tank 11, and slot 14 is injected in also vertical offering on the second thread segment 6, and injection slot 14 and injection hole 12 connect
Logical, staff injects the glue of liquid condition by injection hole 12, and glue enters the second thread segment 6 simultaneously by injection hole 12
Gas is discharged from stomata 13, until glue fills up stomata 13.It can be by screw and product 1 after the glue of filling liquid tank 11 is dry
It is bonded together, to achieve the effect that firmly install, so that looseness prevention self-tapping screw is not easily to fall off.
First thread segment 5 has been wholely set expansion arc 15 close to one end of screw head 2, and the outer diameter of expansion arc 15 is greater than the first spiral shell
The outer diameter of line section 5 and the outer diameter for being less than screw head 2, after looseness prevention self-tapping screw is mounted on product 1, expansion arc 15 can be into one
The abutting product 1 of step, so that screw is not easy to loosen.
Second thread segment 6 offers transition chamfering 16 close to one end of smooth section 7, and transition chamfering 16 is convenient for the second thread segment
6 further expand the hole that third thread segment 8 opens up out, convenient for the tapping of the first self tapping thread 9 and fluting thread 10.
The outer diameter of first thread segment 5 and the second thread segment 6 is all larger than smooth section 7 and third thread segment 8, therefore the first screw thread
Section 5 and the hole that the second thread segment 6 can expand third thread segment 8 and smooth section 7 opens up out, so that the first thread segment 5 and second
Thread segment 6 can be closer jointing product 1.
The second self tapping thread 17 is fixedly connected on third thread segment 8, the outer diameter of smooth section 7 is slightly larger than the second self tapping thread
Therefore 17 outer diameter can expand the hole that third thread segment 8 opens up out when smooth section 7 enters product 1, while squeezing second
The thread groove that self tapping thread 17 opens up, so that the second self tapping thread 17 is not easy the thread groove opened up out before rotating into again
It is interior, therefore tapping screw is not easy to loosen.
It is fixedly connected with incremental thread 18 on spiral shell tail 4, is incremented by thread 18 and is connected with the second self tapping thread 17, and with second
The screw pitch having the same of self tapping thread 17 and lead angle, therefore it is incremented by screw thread and the second self tapping thread 17 that thread 18 opens up out
The screw thread opened up out is overlapped, and the size for being incremented by thread 18 is gradually increased from spiral shell tail 4 to third thread segment 8, therefore opens up thread groove
Shi Huiyou incremental process, therefore looseness prevention self-tapping screw is more laborsaving when deep drilling into product 1.
As shown in Figure 1 and Figure 4, the coarse setting in looseness prevention self-tapping screw surface, therefore between looseness prevention self-tapping screw and product 1
Frictional force increase, while the first thread segment 5 and the second thread segment 6 can be bonded preferably with glue.Looseness prevention self-tapping screw table
It is also coated with rust-proof coating 19 on face, can be zinc coating, the looseness prevention self-tapping screw after being provided with rust-proof coating 19 is not easy to get rusty,
Screw can be reduced because corroding and the probability of breaking releasing.
In conclusion staff passes through injection hole 12 after looseness prevention self-tapping screw is mounted on product 1 by staff
Glue is injected into liquid tank 11, when due to injecting glue from liquid tank 11, the gas in liquid tank 11 can be discharged from stomata 13,
Therefore conveniently glue can be injected between tapping screw and product 1, until glue is full of stomata 13, is withouted waiting for
Glue slowly penetrates into, very convenient, tapping screw and product 1 can be bonded after glue is dry, so that tapping screw is connect with product 1
Stablize, is not easy to loosen.
The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to
Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (8)
1. a kind of looseness prevention self-tapping screw is mounted on product (1), including screw head (2), spiral shell body (3) and spiral shell tail (4), the spiral shell tail
(4) setting is in tip, it is characterised in that: the spiral shell body (3) is disposed with the first thread segment from screw head (2) to spiral shell tail (4)
(5), the second thread segment (6), smooth section (7) and third thread segment (8), first thread segment (5) and second thread segment
(6) outer diameters such as, and the outer diameter of first thread segment (5) and second thread segment (6) is all larger than the third thread segment
(8)；
The first self tapping thread (9), institute are continuously fixedly connected on first thread segment (5) and second thread segment (6)
It states and is also fixedly connected with fluting thread (10), the first self tapping thread (9) and the fluting thread on the second thread segment (6)
(10) screw pitch having the same and lead angle, the start angle of the first self tapping thread (9) and fluting thread (10)
Difference, for opening up liquid tank (11), the liquid tank (11) is opened on the product (1) the fluting thread (10)；
Through offering injection hole (12) on the screw head (2), the injection hole (12) is connected to the liquid tank (11).
2. looseness prevention self-tapping screw according to claim 1, it is characterised in that: stomata (13) are offered on the screw head (2),
The stomata (13) is connected to the liquid tank (11), and second thread segment (6) offers injection slot (14), the injection slot
(14) it is connected to the injection hole (12).
3. looseness prevention self-tapping screw according to claim 1, it is characterised in that: the third thread segment (8) offers second
Self tapping thread (17), the outer diameter of the smooth section (7) are greater than the outer diameter of the second self tapping thread (17).
4. looseness prevention self-tapping screw according to claim 1, it is characterised in that: the outer surface of the looseness prevention self-tapping screw is coarse
Setting.
5. looseness prevention self-tapping screw according to claim 1, it is characterised in that: second thread segment (6) is close to described flat
The one end of sliding section (7) offers transition chamfering (16).
6. looseness prevention self-tapping screw according to claim 3, it is characterised in that: be fixedly connected on the spiral shell tail (4) incremental
Thread (18), the incremental thread (18) is connected with the second self tapping thread (17) and screw pitch having the same and screw thread liter
The size at angle, the incremental thread (18) is gradually increased from spiral shell tail (4) the Xiang Suoshu third thread segment (8).
7. looseness prevention self-tapping screw according to claim 1, it is characterised in that: the looseness prevention self-tapping screw surface is coated with anti-
It becomes rusty coating (19).
8. looseness prevention self-tapping screw according to claim 1, it is characterised in that: first thread segment (5) is close to the spiral shell
One end of head (2) is fixedly connected with expansion arc (15), and the outer diameter of the expansion arc (15) is greater than the outer of first thread segment (5)
Diameter and the outer diameter for being less than the screw head (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822191465.6U CN209510850U (en) | 2018-12-21 | 2018-12-21 | A kind of looseness prevention self-tapping screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822191465.6U CN209510850U (en) | 2018-12-21 | 2018-12-21 | A kind of looseness prevention self-tapping screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209510850U true CN209510850U (en) | 2019-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822191465.6U Active CN209510850U (en) | 2018-12-21 | 2018-12-21 | A kind of looseness prevention self-tapping screw |
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| Country | Link |
|---|---|
| CN (1) | CN209510850U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325949A (en) * | 2022-02-09 | 2022-04-12 | 中国科学院上海光学精密机械研究所 | High-reliability optical fiber coupling assembly system |
-
2018
- 2018-12-21 CN CN201822191465.6U patent/CN209510850U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325949A (en) * | 2022-02-09 | 2022-04-12 | 中国科学院上海光学精密机械研究所 | High-reliability optical fiber coupling assembly system |
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