CN208057655U - A kind of special shaped screw bolt on long head - Google Patents
A kind of special shaped screw bolt on long head Download PDFInfo
- Publication number
- CN208057655U CN208057655U CN201820558812.1U CN201820558812U CN208057655U CN 208057655 U CN208057655 U CN 208057655U CN 201820558812 U CN201820558812 U CN 201820558812U CN 208057655 U CN208057655 U CN 208057655U
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- muscle
- head
- special shaped
- bolt
- screw rod
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Abstract
The utility model discloses a kind of special shaped screw bolts on long head, including head (1) and screwed screw rod (2), head (1) includes first (3) and second (4), wherein, first (3) are cylinder, and are equipped with hexagon counterbore；Second (4) include the round core bar (5) of connection first (3) and screw rod (2), round core bar (5) outer surface is uniformly provided with axial the first muscle (6) and the second muscle (7), and first muscle (6) and the second muscle (7) be staggered, circumferential circular bar (8) is connected between the first muscle (6) and the second muscle (7).The utility model has the characteristics that bending resistance is preferable, service life is longer and provides working efficiency.
Description
Technical field
The utility model is related to a kind of deep hole bolt, especially a kind of special shaped screw bolt on long head.
Background technology
Bolt is a kind of fastener, is usually made of two parts in head and screw rod.Existing bolt arrangement applied to
When deep hole connects, in order to easy to process, the length of screw portion is only merely extended.This elongated rod-like structure is just led
The existing bolt bending resistance suitable for deep hole has been caused to be affected, the L/D ratio of screw portion is bigger, bolt
Bending resistance it is poorer, the service life of bolt also shortens therewith.Meanwhile elongated screw portion just be screwed into when due to
Lack auxiliary aligning structure, screw axis and screw hole axis angle are larger, need screw rod reversing the screw thread that several circles both make and nibble
It closes, screw thread stripped thread can be caused by being otherwise screwed by force.In addition, end face of the existing bolt with interior hexagonal counterbore is plane, hexagonal
Spanner is not easily pluggable into corresponding counterbore, this point is particularly evident when deep hole bolt needs to back-out.
Therefore, that there are bending resistances is poor, service life is shorter and reduces work for the existing bolt suitable for deep hole
The problem of efficiency.
Utility model content
The purpose of the utility model is to provide a kind of special shaped screw bolts on long head.The utility model has bending resistance
Can be preferable, service life is longer and provides working efficiency the characteristics of.
The technical solution of the utility model：A kind of special shaped screw bolt on long head, including head and screwed screw rod, head
Portion includes first and second, wherein first is cylinder, and is equipped with hexagon counterbore；Second includes connection first
The round core bar in portion and screw rod, round core rod outer surface are uniformly provided with axial the first muscle and the second muscle, and the first muscle and the second cross dystopia of muscle and tendon
Position setting, is connected with circumferential circular bar between the first muscle and the second muscle.
In a kind of special shaped screw bolt on long head above-mentioned, the quantity of first muscle and the second muscle is identical, and many
In 2.
In a kind of special shaped screw bolt on long head above-mentioned, the outer end face of the counterbore is cyclic annular convex globoidal.
Compared with prior art, the utility model is by extension headers rather than screw rod is installed to be applicable in deep hole.Head
Prolongation is the first muscle and the second muscle being staggered, and the first muscle and the second muscle are connected through circular bar, and this structure not only carries
The high bending resistance of bolt, and when being screwed into, the first muscle, the second muscle or circular bar can lean against the inner wall of mounting hole, by
This bolt axis and screw hole axis angle are not too large, reduce to positive operation, screw rod can be quickly screwed screw hole, improve
Working efficiency.
Further, end face where hexagonal counterbore is cyclic annular convex globoidal in the utility model head, and allen wrench can
Cambered surface relatively easily slides into interior hexagonal counterbore whereby, further improves working efficiency.
To sum up, the utility model has the characteristics that bending resistance is preferable, service life is longer and provides working efficiency.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the front view of the utility model.
Reference numeral：The heads 1-, 2- screw rods, 3- first, 4- second, 5- round core bars, the first muscle of 6-, the second muscle of 7-,
8- circular bars.
Specific implementation mode
With reference to embodiment, the utility model is described in further detail, but be not intended as to the utility model limit according to
According to.
Embodiment：A kind of special shaped screw bolt on long head constitutes as depicted in figs. 1 and 2, including head 1 and screwed
Screw rod 2, head 1 include first 3 and second 4, wherein first 3 is cylinder, and is equipped with hexagon counterbore；Second 4
Round core bar 5 including connection first 3 and screw rod 2,5 outer surface of round core bar are uniformly provided with axial the first muscle 6 and the second muscle 7,
And first muscle 6 and the second muscle 7 shift to install, circumferential circular bar 8 is connected between the first muscle 6 and the second muscle 7.
The diameter for coating the virtual cylinder of the first muscle 6, the second muscle 7 and circular bar 8 is in 2 diameter of screw rod and first
Between 3 diameters, and the diameter of the preferably imaginary circles cylinder is slightly larger than 2 diameter of screw rod.
First muscle 6 is identical with the quantity of the second muscle 7, preferably by 2 or 4.The muscle manufacture letter of this quantity
It is single, and reach and effect similar in multiple tracks muscle.
The outer end face of the counterbore is cyclic annular convex globoidal, that is, gets first 3 end face of counterbore.
Operation principle：Deep hole bolt is usually to initially pass through a mounting hole, then connect with screw hole.Existing elongate threaded screw knot
For the bolt of structure when being screwed into, typically screw portion leans against the inner wall of mounting hole, this results in screw axis and screw axis wire clamp
Angle is larger, needs to carry out to just operating, stripped thread can be caused by being otherwise screwed by force.
And the circular bar 8 for the first muscle 6 and the second muscle 7 and both connections that the utility model is staggered can not only carry
The bending resistance of high bolt makes the axis of screw rod 2 and screw hole press from both sides due also to this three can lean against inner wall of the hole installing when being screwed into
Angle is smaller, thus shortens to just operating, screw rod 2 can be quickly screwed screw hole, improve work efficiency.
Moreover, the end face that head 1 is equipped with interior hexagonal counterbore is cyclic annular convex globoidal, and allen wrench whereby can be light
Ground slides into interior hexagonal counterbore.When the bolt in deep hole needs to back-out, this structure will seem very convenient.
Claims (3)
1. a kind of special shaped screw bolt on long head, including head (1) and screwed screw rod (2), it is characterised in that：Head (1)
Including first (3) and second (4), wherein first (3) are cylinder, and are equipped with hexagon counterbore；Second (4) are wrapped
Include connection first (3) and screw rod (2) round core bar (5), round core bar (5) outer surface be uniformly provided with axial the first muscle (6) and
Second muscle (7), and the first muscle (6) and the second muscle (7) shift to install, and are connected between the first muscle (6) and the second muscle (7) circumferential
Circular bar (8).
2. a kind of special shaped screw bolt on long head according to claim 1, it is characterised in that：First muscle (6) and
The quantity of two muscle (7) is identical, and is no less than 2.
3. a kind of special shaped screw bolt on long head according to claim 1, it is characterised in that：The outer end face of the counterbore is
Cyclic annular convex globoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820558812.1U CN208057655U (en) | 2018-04-19 | 2018-04-19 | A kind of special shaped screw bolt on long head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820558812.1U CN208057655U (en) | 2018-04-19 | 2018-04-19 | A kind of special shaped screw bolt on long head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208057655U true CN208057655U (en) | 2018-11-06 |
Family
ID=63983126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820558812.1U Active CN208057655U (en) | 2018-04-19 | 2018-04-19 | A kind of special shaped screw bolt on long head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208057655U (en) |
-
2018
- 2018-04-19 CN CN201820558812.1U patent/CN208057655U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |