CN105485120A - Fastener for automotive injection molding inserts - Google Patents
Fastener for automotive injection molding inserts Download PDFInfo
- Publication number
- CN105485120A CN105485120A CN201610047915.7A CN201610047915A CN105485120A CN 105485120 A CN105485120 A CN 105485120A CN 201610047915 A CN201610047915 A CN 201610047915A CN 105485120 A CN105485120 A CN 105485120A
- Authority
- CN
- China
- Prior art keywords
- screw rod
- head
- bolt head
- pad
- injection moulding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 18
- 238000005452 bending Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
- F16B23/0038—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially prismatic with up to six edges, e.g. triangular, square, pentagonal, Allen-type cross-sections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
- F16B39/26—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object with spring washers fastened to the nut or bolt-head
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/282—Locking by means of special shape of work-engaging surfaces, e.g. notched or toothed nuts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a fastener for automotive injection molding inserts, belongs to the field of bolts and solves the problems that existing hexagon bolts easily slip during tightening, the quality is not stable and the operation and mounting are complicated. According to the technical scheme, the fastener comprises a bolt head part, wherein an inner layer of stepped hole and an outer layer of stepped hole are formed in the bolt head part, the cross section of the inner layer of stepped hole is in a hexagonal socket shape, the bottom surface of the bolt head part extends downwards to form a screw rod, threads are formed in the outer edge of the middle of the screw rod, chamfers are formed on the bottom end surface of the screw rod, a gasket is arranged in the joint of the bolt head part and the screw rod, and the gasket, the bolt head part and the screw rod are integrally arranged.
Description
technical field:
The invention belongs to plastic insert fastener areas, particularly relate to a kind of automobile injection moulding inserts fastening piece.
background technique:
Bolt utilizes the inclined-plane circular rotating of object and the physics of frictional force and mathematical principle, the by easy stages instrument of fastening implements parts.In industry-by-industry, all play irreplaceable effect.Especially along with the increase of plastic strength, in automobile plastic moulding, also often can use bolt be connected with metal insert, thus fixed plastics part.Bolt head conventional at present adopts outer-hexagonal or interior hexagonal usually, also have and adopt the pentagon of some complexity or quincunx, but no matter adopt which kind of shape, along with the increase of fastening number of times, all can there is cunning side between spanner and endoporus or external frame, affect the fastening quality of bolt.
And the bolt produced now, unreasonable due to which production aspect, cause the quality problems of bolt possibly, and existing a lot of bolt is all what to separate with pad, adds operating procedure.Therefore, how to enable bolt convenient, practical, industrial strength can be met when locking and will to have hoped for success technician's problem to be solved in this field.
In addition, traditional flat gasket and spring washer are two different products.After bolt head is tightened, spring washer makes to screw between screw thread at the elastic reaction that pressing produces afterwards by the pawl head tilted and compresses, and meanwhile, the pawl head of tilting props up the supporting surface being connected component, plays anti-loose effect.But traditional compression spring is monodactyle formula, when tightening, the pawl head of tilting can be comparatively large to the surface failure being connected component, and be not suitable for the anti-loose process of the less component of surface hardness.
summary of the invention:
The present invention overcomes the deficiency that prior art exists, solve existing hex head bolt fastening time easily there is cunning side, and quality is unstable, complicated problem is installed in operation, aim to provide a kind of automobile injection moulding inserts fastening piece, this automobile injection moulding inserts fastener constructions is simple, convenient and practical, pad and bolt head is wholely set, increase the fastening effect of bolt, not easily loosen and skid.
For solving the problems of the technologies described above, the technical solution used in the present invention is: automobile injection moulding inserts fastening piece, comprise bolt head, described bolt head offers inside and outside two-layer shoulder hole, the sectional shape of shoulder hole internal layer is interior hexagonal, and the bottom surface of bolt head extends to form screw rod downwards, outer rim in the middle part of screw rod is provided with screw thread, the bottom end of screw rod is provided with chamfering, and the junction point of described bolt head and screw rod is provided with pad, the one-body molded setting of described pad, bolt head and screw rod.
Further, the outer field shape of cross section of shoulder hole is circular, or is square, or is pentagon, or is quincunx.
Further, the excircle of described pad is bending to screw rod direction.
Further, the excircle of described pad is provided with at least two pawl heads tilted, the identical and direction be to screw rod, the tilting direction of described pawl head tilts.
Further, the height that described pawl head tilts is less than the thickness of pad.
Further, the quantity of described pawl head is three, and three pawl head annulars are distributed on the excircle of pad.
Further, the lower surface of described pawl head is evenly provided with multiple anti-skidding groove.
The present invention compared with prior art has following beneficial effect: the present invention is by arranging two-layer shoulder hole at bolt head, different hole is tightened inside and outside two-layer setting, shape according to shoulder hole makes corresponding spanner, two-layer hole of tightening can increase occlusal contact area between spanner and bolt head, greatly reduces skidding probability.
Pad is integrated into bolt head by the present invention in addition, can increase the fastening effect of bolt, not easily loosens and skids, more not easy to wear, increases the working life of bolt.Simplify the installation process of hex head bolt, easy to use.
accompanying drawing illustrates:
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the plan structure schematic diagram of automobile injection moulding inserts fastening piece.
Fig. 3 is the hex head bolt structural representation of band pawl head.
In figure: 1 is bolt head, 2 is screw rod, and 3 is chamfering, and 4 is pad, and 5 is pawl head, and 6 is shoulder hole internal layer, and 7 is that shoulder hole is outer.
embodiment:
For enabling object of the present invention, feature and advantage more become apparent, and explain the specific embodiment of the present invention below in conjunction with accompanying drawing.
Please refer to Fig. 1, Fig. 2, Fig. 1 is the schematic diagram of a kind of embodiment of automobile injection moulding inserts fastening piece provided by the present invention.
In this kind of embodiment, automobile injection moulding inserts fastening piece of the present invention, comprise bolt head 1, described bolt head 1 offers inside and outside two-layer shoulder hole, the sectional shape of shoulder hole internal layer 6 is interior hexagonal, the sectional shape of shoulder hole skin 7 is circular, the bottom surface of bolt head 1 extends to form screw rod 2 downwards, outer rim in the middle part of screw rod 2 is provided with screw thread, the bottom end of screw rod 2 is provided with chamfering 3, described bolt head 1 is provided with pad 4 with the junction point of screw rod 2, described pad 4, bolt head 1 and the one-body molded setting of screw rod 2.
By arranging two-layer shoulder hole, shoulder hole internal layer 6 retains original interior hexagonal structure, and shoulder hole outer 7 adopts different cross section shape, to increase the occlusal contact area of spanner and hexagon socket head cap screw, prevent from occurring cunning side between spanner and hexagon socket head cap screw, greatly reduce skidding efficiency.Pad 4 and the one-body molded setting of bolt head 1 in addition, simplify manufacture and installation procedure, and after bolt head 1 bottom surface increases pad 4, add the area of contact of bolt head 1 and connected component, strengthen the join strength of bolt and parts, effectively prevent bolt from getting loose and skid.
In order to increase the frictional force between bolt head 1 and connected component further, the excircle of described pad 4 is bending to screw rod 2 direction.After the excircle of pad 4 is slightly bending downwards, after hexagon socket head cap screw is tightened, bending pad 4 excircle is flattened by bolt head 1, pad 4 is only fitted in connection portion surface by the spring-back force of pad 4 excircle, add the pressure force on bolt head 1 and connected component surface, thus the frictional force increased between bolt head 1 and connected component, effectively prevent hexagon socket head cap screw to get loose skidding.
It should be noted that, the shape of above-described embodiment Intermediate gasket 4 can make circle also can be square, or according to other special shapes of practical situations design.And the sectional shape of shoulder hole skin 7 is circular, also can be square, or be pentagon, or be quincunx, the present embodiment specifically outside restriction shoulder hole 7 concrete shape, if can and special wrench set between increase occlusal contact area.Adopt above-mentioned shape just for processing and fabricating is convenient.
Please refer to Fig. 3, on the basis of above-described embodiment, in another kind of embodiment of the present invention, the excircle of described pad 4 is provided with at least two pawl heads 5 tilted, identical and pawl head 5 is to screw rod 2 direction, the tilting direction of described pawl head 5 tilts.And the height that described pawl head 5 tilts is less than the thickness of pad 4.
After hex head bolt is tightened, the lower surface of multiple pawl head 5 and connected component surface contact, equally, the spring-back force of pawl head 5 compresses the contact surface of connected component, increases the fastening frictional force of hex head bolt with this, so increase hex head bolt loosen de-ability.And by arranging plural pawl head 5, pawl head 5 effectively can be avoided for the damage on connected component surface, reach the object repeatedly dismantled.
It should be noted that, the quantity only limiting pawl head 5 in the present embodiment is two or more, the quantity of pawl head 5 can be selected according to the size of bolt head 1, to reach suitable pretightening force and anti-loose object, conventional hex head bolt, the quantity of described pawl head 5 is three, and three pawl head 5 annulars are distributed on the excircle of pad 4.
On the basis of above-described embodiment, in another embodiment of the present invention, the lower surface of described pawl head 5 is evenly provided with multiple anti-skidding groove.Arranging of anti-skidding groove is to increase the frictional force increased further between bolt head 1 and connected component, preventing hex head bolt from getting loose equally.
In sum, automobile injection moulding inserts fastening piece technique of the present invention is simple, with low cost, and operation fast, simply, conveniently, can make the fastening effect of bolt better by increasing pad 4, not easily loosening and skidding, more difficult wearing and tearing, longer service life.And making corresponding spanner according to the shape of shoulder hole, two-layer hole of tightening can increase occlusal contact area between spanner and bolt head, greatly reduces skidding probability.
By reference to the accompanying drawings embodiments of the invention are explained in detail above, but the present invention is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.
Claims (7)
1. automobile injection moulding inserts fastening piece, it is characterized in that: comprise bolt head (1), described bolt head (1) offers inside and outside two-layer shoulder hole, the sectional shape of shoulder hole internal layer (6) is interior hexagonal, the bottom surface of bolt head (1) extends to form screw rod (2) downwards, the outer rim at screw rod (2) middle part is provided with screw thread, the bottom end of screw rod (2) is provided with chamfering (3), described bolt head (1) is provided with pad (4) with the junction point of screw rod (2), described pad (4), bolt head (1) and screw rod (2) one-body molded setting.
2. automobile injection moulding inserts fastening piece according to claim 1, is characterized in that: the shape of cross section of shoulder hole skin (7) for circular, or is square, or is pentagon, or is quincunx.
3. automobile injection moulding inserts fastening piece according to claim 2, is characterized in that: the excircle of described pad (4) is bending to screw rod (2) direction.
4. automobile injection moulding inserts fastening piece according to claim 3, it is characterized in that: the excircle of described pad (4) is provided with at least two pawl heads (5) tilted, the identical and direction be to screw rod (2), the tilting direction of described pawl head (5) tilts.
5. automobile injection moulding inserts fastening piece according to claim 4, is characterized in that: the height that described pawl head (5) tilts is less than the thickness of pad (4).
6. automobile injection moulding inserts fastening piece according to claim 5, is characterized in that: the quantity of described pawl head (5) is three, three pawl head (5) annulars are distributed on the excircle of pad (4).
7. automobile injection moulding inserts fastening piece according to claim 6, is characterized in that: the lower surface of described pawl head (5) is evenly provided with multiple anti-skidding groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610047915.7A CN105485120A (en) | 2016-01-26 | 2016-01-26 | Fastener for automotive injection molding inserts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610047915.7A CN105485120A (en) | 2016-01-26 | 2016-01-26 | Fastener for automotive injection molding inserts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105485120A true CN105485120A (en) | 2016-04-13 |
Family
ID=55672323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610047915.7A Pending CN105485120A (en) | 2016-01-26 | 2016-01-26 | Fastener for automotive injection molding inserts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105485120A (en) |
-
2016
- 2016-01-26 CN CN201610047915.7A patent/CN105485120A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160413 |
|
| WD01 | Invention patent application deemed withdrawn after publication |