CN106917799A - A kind of expansion anchor - Google Patents
A kind of expansion anchor Download PDFInfo
- Publication number
- CN106917799A CN106917799A CN201510988886.XA CN201510988886A CN106917799A CN 106917799 A CN106917799 A CN 106917799A CN 201510988886 A CN201510988886 A CN 201510988886A CN 106917799 A CN106917799 A CN 106917799A
- Authority
- CN
- China
- Prior art keywords
- expansion
- crab
- expander
- expansion sleeve
- bolt bar
- 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
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- 230000011218 segmentation Effects 0.000 claims description 12
- 230000033001 locomotion Effects 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010907 stover 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
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/066—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like
Abstract
The invention discloses expansion anchor (1) of the one kind with crab-bolt bar (2), the crab-bolt bar has a rear thread (3), a nut (6) for having torque is screwed on thereon and with a preceding thread (4), expander (7) is screwed on thereon, and an expansion sleeve (8), it is axially supported on the bearing of crab-bolt bar (2) (10).Nut (6) on rear thread (3) has friction square and torque, therefore when extension is started, crab-bolt bar (2) rotates together with nut (6), and preceding thread (4) makes expander (7) be pulled into expansion sleeve (8) the inside and extends expansion sleeve.Expansion anchor of the invention is realized cutting, and expansion anchor instead cut by card, improves its anchor.
Description
Technical field
The present invention relates to crab-bolt field, more particularly to a kind of expansion anchor with crab-bolt bar.
Background technology
This expansion anchor as known to European patent EP 1301719B1.Known expansion anchor has
One crab-bolt bar, crab-bolt bar has preceding thread on front end, and crab-bolt bar has rear thread on rear end.
Expander is screwed on crab-bolt bar preceding thread, it is taper type in known expansion anchor and has
One with female axially extending bore, the preceding thread for being tightened on crab-bolt bar.Expansion anchor is in anchor
Shunk on the rear extreme direction of tightening latch.
And then expander sets an expansion sleeve on the crab-bolt bar of known expansion anchor.By longitudinal direction
Gap makes expansion sleeve be divided into expansion arc.Part axial length of the expansion arc of gap and correlation in expansion sleeve
Upper extension, such as on about the 2/3 of expansion sleeve axial length, thus expansion sleeve is gone up in circle in its back-end
Closed in circumferential direction.It is unlimited in the gap on the expansion sleeve front end of expander, expansion arc is swollen
There is free end on the front end of expansion set.Known expansion anchor is swollen on the closing end of longitudinal slot
Expansion set has circular groove, is consequently formed a kind of hinge, with the vacation extended on expansion sleeve chord line
Think yawing axis, expansion arc can be deflected outward by thereon.The front end that expansion arc faces expander at it from
By extreme direction it is upper conical shrink, for providing free space inside cylindrical hole, for expansion arc
It is deflected outward by, i.e. for expansion sleeve extension.Expansion arc has tool outwardly on free front end
Have the pawl of cutting blade, they when expansion sleeve extends top pressure to inside hole wall, if expansion sleeve is inside hole
When extension.Hole is for example added to concrete the or brick anchor base of building as drilling
Plinth, such as wall, roof or ground the inside.Made by being squeezed into inside hole wall when expansion sleeve extends
The pawl of expansion arc is produced inside hole wall and cut, and they counter are blocked by the pawl of the expansion sleeve for extending.
The tightening nut on the rear thread of the crab-bolt bar of known expansion anchor.Between nut and expansion sleeve
Spacer sleeve is set on crab-bolt bar, makes expansion sleeve in tightening nut for expansion sleeve extended axis by it
To being supported on nut, nut is on the rear thread of crab-bolt bar.
In order on the rear thread for extending the crab-bolt bar for making nut rotate to known expansion anchor.Crab-bolt bar can
Can be rotated together with nut and thus deeper be screwed into expander the inside and/or nut in rear thread
On relative to crab-bolt bar rotate.Nut and expander on the rear thread of crab-bolt bar in all cases
The distance between shorten.Thus expander is made to be pulled into expansion sleeve the inside, it is axially through spacer sleeve branch
Hold on nut and be not therefore axially moved.The outside top pressure expansion arc of expander, i.e. it makes expansion sleeve
Extension, the wherein pawl of expansion sleeve are squeezed into hole wall the inside and thus produce and cut as described above, and they are anti-
Hole clipping wall.Expansion sleeve extends so much, make the conical outer surface of expansion arc over the whole length or
Person is outwardly acted against on hole wall entirely.Expansion anchor be anchored in hole the inside, wherein not only from expander to
The expansion arc of outer top pressure hole wall is by the friction lock on hole wall and is squeezed into the pawl inside hole wall
Play a part of to make expansion anchor be anchored in inside hole by shape sealed.
The content of the invention
(1) technical problem to be solved
The technical problem to be solved in the present invention is to provide a kind of with the expansion anchor for being more preferably anchored characteristic.
(2) technical scheme
In order to solve the above technical problems, the present invention provides a kind of expansion anchor with crab-bolt bar, including：
Expansion anchor (1) of the one kind with crab-bolt bar (2), the crab-bolt bar has one to carry rotary part
(6) rear thread (3), one is using spiral connection and the preceding thread (4) of crab-bolt bar (2)
The expander (7) and an expansion sleeve (8) of connection, wherein by relative to expander (7)
Rotation crab-bolt bar (2) makes expander (7) be moved simultaneously on the longitudinal direction of crab-bolt bar (2)
And expansion sleeve (8) the inside can be pulled into and thus extend expansion sleeve (8), wherein described
, with the pawl with cutting blade (15) outwardly, they are in expansion sleeve (8) for expansion sleeve (8)
Hole wall (25) the inside is squeezed into when hole (23) the inside extends, it is characterised in that the anchor
With a bearing (10) for being used for expansion sleeve (8), it is drawing in expander to tightening latch (2)
(7) expansion sleeve (8), and the rotary part (6) and crab-bolt bar (2) are axially supported when
Rear thread (3) be have torque and will be than on crab-bolt bar (2) to expander (7)
Bigger torque be delivered on crab-bolt bar (2).
Wherein, the crab-bolt bar (2) is with a tool seat (27), for by shape sealed
Anti-rotationally setting tool is gone up in its back-end.
Wherein, by drawing in expander when the expander (8) extends inside hole (23)
(7) move in the vertical.
Wherein, the pawl (14) of the expansion sleeve (8) by expansion sleeve (8) extension when
Cutting inside hole wall (25), its axial direction in hole (23) are realized in motion in the vertical
On it is longer than the thickness of pawl (14).
Wherein, the cutting blade (15) is blunt.
Wherein, the segmentation that the cutting blade (15) extends with circular arc or extends on chord line
(18,19)。
Wherein, the expansion sleeve (8) is divided into swollen by the gap (11) for extending in the vertical
Swollen section (12).
Wherein, the expansion sleeve (8) and/or expander (7) with least one outwardly
Anti-rotation member (22).
Wherein, the expander (7) and/or expansion sleeve (8) are with a dress for increasing friction
(28) are put, it increases the friction between expander (7) and expansion sleeve (8), in expansion sleeve
(8) when extending.
Wherein, the expander (7) is rubbed with a plucking and/or a protuberance as increase
Part, their such settings, when expansion sleeve extends, make expansion sleeve (8) contact plucking and/or
Protuberance.
(3) beneficial effect
Expansion anchor of the invention is simple and compact for structure, easy to operate, reduces production cost,
Improve reliability and security.
Brief description of the drawings
Fig. 1 is the side view of expansion anchor of the invention；
Fig. 2 is enlarged drawing of the expansion anchor of Fig. 1 at expansion sleeve position in extended mode；
Fig. 3 is the front view of the expansion sleeve of the expansion anchor of Fig. 1 and 2；
Fig. 4 is that amplification of the expansion arc of the expansion sleeve of the expansion anchor of Fig. 1 and 2 in claw position is indulged
To sectional view.
1- expansion anchors in figure, 2- crab-bolt bars, 3- rear threads, 4- preceding threads, 5- pads, 6- nuts,
7- expanders, 8- expansion sleeves, 9- land ranks, 10- bearings, 11- gaps, 12- expansion arcs, 13- surround
Groove, 14- pawls, 15- cutting blades, 16- sides, 17- sides, 18- segmentations, 19- segmentations, 20- poppet surfaces,
21- inward flanges, 22- anti-rotation members, 23- holes, 24- is anchored basis, and 25- hole walls, 26- is recessed, 27-
Interior six side, 28- inclines annular knurl.
Specific embodiment
The shown crab-bolt bar 2 according to expansion anchor of the invention 1 with screw-like in Fig. 1,
With the rear thread 3 on rear end and the preceding thread on front end 4.As rear end and front end or preceding
The mark of screw thread or rear thread 3,4 is especially as consistent mark.Pad is set on rear thread 3
5 and nut 6 is screwed on, it is general it can be appreciated that helical element.The internal thread of nut 6 is with after
Screw thread 3 forms nut 6 and is connected with the spiral of crab-bolt bar 2.
Expander 7 is screwed on the preceding thread 4 of crab-bolt bar 2, it has axially extending bore, be pipe
Shape.The through hole of expander 7 has internal thread, and expansion anchor 2 is screwed into by internal thread expander
On preceding thread 4.The internal thread of expander and the preceding thread 4 of crab-bolt bar 2 form spiral connection,
Expander 7 is set to be connected with crab-bolt bar 2 by it.Not making crab-bolt bar 2 necessarily has external screw thread
As preceding thread 4, and make expander 7 that there is internal thread.For example it is also contemplated that opposite knot
Structure, i.e. solid expander 7 has axially shaft-like convex shoulder on the rear end that it shrinks, wherein shaft-like
Convex shoulder has external screw thread, and it is screwed into the internal thread the inside (not shown) on the front end of crab-bolt bar 2.It is swollen
Swollen body 7 is taper type, and wherein this shape is not compulsory for the present invention.Expander 7
Shape thereby determines that it extends expansion sleeve when 8 the inside of expansion sleeve is tightened onto.Expander 7 exists
Shunk on the rear extreme direction of crab-bolt bar 2.
And then expander 7 is arranged on the preceding thread 4 of crab-bolt bar 2 expansion sleeve 8.Its rear end
Act against on the land rank 9 of crab-bolt bar 2, its preceding thread 4 is retracted to by land rank crab-bolt bar 2
Diametrically.Land rank 9 forms bearing 10, and it makes expansion sleeve 8 axially be supported on crab-bolt bar 2
On.Expansion sleeve 8 has the gap 11 for extending in a longitudinal direction thereof, and they are in face of expander 7
Unlimited on the front end of expansion sleeve 8, in most of length of expansion sleeve 8 extend and with expansion
The rear end compartment of terrain termination of set 8.Expansion sleeve 8 is divided into expansion arc 12 by gap 11, they
Expansion sleeve 8 it is longitudinally extending.Expansion sleeve 8 about has circular groove 13 in its lengthwise centers,
It forms a kind of bending position of expansion arc 12.Circular groove 13 is as a kind of hinge by string
Side upwardly extends, the imaginary axis for each expansion arc 12 works, and makes around axis swollen
Swollen section 12 of front end segmentation can be deflected outward by.
Nut 6 is self-locking nut, and with the plastic hoop being lining into inside groove on the inside of it, it is in figure
In it is invisible.There is friction on the rear thread 3 of crab-bolt bar 2 and have by plastic hoop nut 6 and turn
Square, nut transmission than crab-bolt bar 2 in the bigger torque of expander 7 on crab-bolt bar 2.Also deposit
In other possibilities, nut 6 or general helical element is set to constitute with having torque, it transmits and compares crab-bolt
The bigger torque on expander 7 of bar is on crab-bolt bar 2.One example is so-called self-locking
(Stover) nut, it is slightly non-circular and thus clamps.Possibility is there is also, reason is provided with
Judgement open position, thus make the nut 6 on rear thread transmit than crab-bolt bar 2 on expander 7 more
Big torque is on crab-bolt bar 2.Clamp nut can be for example screwed on rear thread 3, be stitched by it
Gap inserts shear pin (not shown).After resonable judgement open position disconnection, the shearing of such as shear pin
Torque of the torque of clamp nut on expander loses substantially.Enumerating is exemplary and no longer arranges
Lift.
Expansion arc 12 has pawl 14 outwardly on the front end that it faces expander 7, has
Cutting blade 15.As seen in the enlarged drawing of Fig. 4, in the longitudinal cross-section of expansion sleeve 8
Find out that pawl 14 has the shape of tooth in figure, their zigzag ground has the trailing flank 16 of almost radial direction
With with larger inclined leading flank 17.Cutting blade 15 is blunt, therefore when concrete is clamp-oned not
Meeting sharp wear fractures.Cutting blade 15 has circular arc on the circumferencial direction at the center of cutting blade 15
, on the circumferencial direction of expansion sleeve 8 extend segmentation 18 and point-blank on chord line extend
18 segmentation 19 therebetween of segmentation.The centre bit of the segmentation of cutting blade 15 19 extended on chord line
In on gap 11.Circular-arc-shaped segments 18 do not protrude from the circumference of expansion sleeve 8.By bounce back,
The segmentation 19 of straight line makes cutting blade 15 have when expansion sleeve 8 extends in the segmentation 18 of annular
Increased pressure, thus makes pawl 14 be easier to be squeezed into such as concrete the inside.
Height of the circular-arc-shaped segments 18 of the cutting blade 15 of pawl 14 on the longitudinal direction of expansion sleeve 8 be for about
0.1-2.0mm, e.g., from about 0.4mm.Pawl 14 is acute angle, and side 16 is with about 0 ° -30 thereafter
°, such as 10 ° of angle extend towards imaginary radius, its leading flank 17 is with about 15 ° -60
°, such as 40 ° towards radius extend.In the bending position or the ring of hinge that form expansion arc 12
Expansion sleeve 8 conically shrinks forward, i.e. on the direction of pawl 14 between groove 13 and pawl 14.
The basic conical shell face 20 with right angle relative to expansion arc 12 of the trailing flank 16 of pawl 14 is circular
Extend between groove 13 and pawl 14, i.e. about with imaginary clinoid tangentially, conical shell face shape
Into the circumferential groove 13 of expansion sleeve 8.When expansion sleeve 8 extends, expansion arc 12 is around by surrounding
The clinoid that groove 13 is formed is deflected outward by, and its median claw 14 is moved on circular orbit, the rear side of pawl
Face 16 tangentially extends with circular orbit.Conical shell face 20 has the cone angle smaller than expander 7,
Thus it is mainly the fore-end contact of expansion arc 12 when expansion sleeve 8 extends.
The leading flank 17 of pawl 14 extends than the less steeply inclined of trailing flank 16, thus has pawl 14
There is enough stability.Although leading flank 17 is steeply inclined, thus pawl 14 be acute angle and
Surface pressure high is produced during extension, for being for example squeezed into concrete the inside.The front ring of expansion sleeve 8
Around inward flange 21 (Fig. 4) have rounding, it is good on the shell surface of expander 7 for ensureing
It is good to slide.Expansion sleeve 8 has by deforming anti-rotation setting up, outwardly near its rear end
Rotation member 22.Looked in the side view of expansion anchor 1, anti-rotation feature 22 is lens shaped,
They extend and are sharp edges in the vertical.Thus them are made to be clamp-oned with lower resistance in the axial direction
To hole the inside and with good rotation preventing function.
The part of expansion anchor 1 is preferably made of metal, and is especially formed from steel, preferably by high intensity and
/ or corrosion resistant steel such as VA steel be made.
Expansion anchor 1 is worn forward by its front end (screwing on expander 7 thereon) in order to be anchored
Cross the through hole of object that is unshowned, being fixed herein and be added to the basic 24 such as concrete of anchor
The inside of the cylindrical hole 23 (Fig. 2) of the inside.By rotation driving nut 6, it is as described above
Clampingly, there is torque ground rotation driving crab-bolt bar 2 on the rear thread 3 of crab-bolt bar 2.Expansion
Set 8 makes expander 7 anti-rotationally be fixed on the inside of hole 23 due to its anti-rotation feature 22, by
The preceding thread 4 of this crab-bolt bar 2 makes expander 7 that expansion sleeve 8 is tightened between expansion arc 12
The inside.When expander 8 is screwed, expander 7 makes the outside top pressure of expansion arc 12, thus makes them
Also acted against in the segmentation between circumferential groove 13 and pawl 14 on the hole wall 25 in hole 23.Outwards
Top pressure expansion arc 12 also referred to as extends expansion arc 12 or expansion sleeve 8, thus makes the anchor of expansion anchor 1
It is connected on the inside of hole 23 for being anchored basis 24.Pawl 14 outwardly is squeezed into by expander 7
The inside of hole wall 25, they are formed in cutting for the inside of hole wall 25, cut anti-hole clipping wall, thus make
Expansion anchor 1 be preferably axially fixed in anchor basis 23 the inside, i.e., be preferably anchored expansible anchor
Bolt 1.
When expansion arc 12 is acted against on the hole wall 25 in hole 23 between circumferential groove 13 and pawl 14
And when pawl 14 is squeezed into 25 the inside of hole wall, terminate extension and the expansion anchor of expansion sleeve 8
1 anchor.
Drawing in the torque during the inside of expansion sleeve 8 in the extension of expansion sleeve 8 and expander 7 increases.
Expansion sleeve 8 is loaded relative to the bearing 10 of crab-bolt bar 2 and transmits same increased torque to anchor
On tightening latch 2.Increase in extending period torque, expansion sleeve 8 and expander 7 transmit torque to anchor
On tightening latch 2, it transmits the bigger torque of nut 6 first, and it is on the rear thread 3 of crab-bolt bar 2
There is friction and thus have torque.Then start nut 6 after the initial extension of expansion sleeve 8
Rotated on the rear thread 3 of crab-bolt bar 2.Because nut 6 by pad 5 and it is unshowned,
The object to be fixed axially is supported on anchor basis 24, rotation of the nut 6 on rear thread 3
The axial movement of influence crab-bolt bar 2.Except expander 7 is deeper pulled into the inside of expansion sleeve 8
And make expansion sleeve continue to extend, this is also resulted in, and expansion sleeve 8 is axially in the bearing 10 of crab-bolt bar 2
On supporting reduction, as shown in Fig. 2 it can be such that crab-bolt bar 2 is moved axially with respect to expansion sleeve 8
It is dynamic, thus produce the distance between rear end of bearing 10 and expansion sleeve 8.When nut 6 after spiral shell
When being rotated on line 3, the axial movement of crab-bolt bar 2 influences the axial force on expansion sleeve 8, thus
Also it is axially moved expansion sleeve.Thus initially only expansion sleeve 8 is axially moved after radial expansion,
When nut 6 rotates on the rear thread 3 of crab-bolt bar 2, thus make pawl 14 not only outside
Top pressure, that is, extend, and is axially moved.Therefore the cutting blade 15 of pawl 14 is not only radially outward squeezed
Enter the inside of hole wall 25 to hole 23, and be axially moved simultaneously.This is easily squeezed into pawl 14
The inside of hole wall 25.The cross section with rounding that pawl 14 realizes annular, referred to herein as cutting
Recessed 26, their anti-claws 14.Recessed 26 in the axial direction than pawl 14 equally in the axial direction
Thickness is higher.
As long as nut 6 rotates when extension is started not on rear thread 3, but crab-bolt bar 2 and spiral shell
Female 6 rotate together, the axial movement of crab-bolt bar 2 are not produced and because its axial direction is supported on crab-bolt
Expansion sleeve 8 is not axially moved when expander 7 is drawn on the bearing 10 of bar 2, but it expands
Only radially outward top pressure, the i.e. extension of section 12.
The anchor of expansion anchor 1 is likely to be realized in so-called pre-inserted assembling, is this by expansion anchor
It is added to the inside of hole 23 that is anchored basis 24 and by rotation driving its crab-bolt bar 2 with above-mentioned
Mode by drawing in expander 7 to the inside of expansion sleeve 8 extension.Because expansion sleeve 8 is in this axle
To being supported on bearing 10, therefore nut 6 is not required for this extension.In order to rotate
Driving is provided with tool seat, in the present embodiment six sides 27 on the rear end of crab-bolt bar 2.When swollen
Expansion set 8 extends so much, expansion arc 12 is acted against hole between circumferential groove 13 and pawl 14
On 23 hole wall 25, it is also possible in advance, can by object that is unshowned, being fixed be placed on from
It is anchored on the basic 24 outstanding rear ends of crab-bolt bar 2, then places pad 5 and by nut 6
It is screwed on rear thread 3 and screws.Manner described above realize expansion anchor 1 continuation extension and
It is anchored.
Taper type expansion sleeve 7 has circular inclination annular knurl 28 on the end being relatively large in diameter.Incline
Outwardly, it is contacted and shape annular knurl 28 with the hole wall 25 in the hole 23 being anchored in basis 24
Into anti-rotational, it prevents expander 7 from being rotated together with crab-bolt bar 2.The shape of annular knurl 28 is inclined simultaneously
Into the device of the increase friction for expansion sleeve 8, but it only has when the free front end of expansion arc 12
Reach just effective during inclination annular knurl 28.So select geometry and size so that it is normal,
It is not the case when extending completely.For example due to being anchored the inside of basis 24 only when hole expands
When formation crackle expansion anchor 1 extends again, i.e. the tension of crab-bolt bar 2 makes expander 7 deeper
When being pulled into 8 the inside of expansion sleeve, being formed increases the inclination annular knurl 28 of rubbing device and enters into expansion
Between section 12.Expander 7 to the inside of expansion sleeve 8 is drawn in this stop and/or end.Formed
The limitation crab-bolt of inclination annular knurl 28 bar 2 and expander 7 of increase rubbing device are in expansion sleeve 8
Axial movement of the face when expansion anchor 1 extends again.
The maximum gauge of crab-bolt bar 2 is more preferably less than and is not more than the straight of expansion sleeve 8 anyway
Footpath.
Expansion anchor of the invention is simple and compact for structure, easy to operate, reduces production cost,
Improve reliability and security.
The above is only the preferred embodiment of the present invention, it is noted that for the art
For those of ordinary skill, on the premise of the technology of the present invention principle is not departed from, can also make some
Improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. one kind has the expansion anchor (1) of crab-bolt bar (2), it is characterised in that should
There is crab-bolt bar a rear thread (3) with rotary part (6), one to be connected using spiral
Connect the expander (7) that is connected with the preceding thread (4) of crab-bolt bar (2) and swollen
Expansion set (8), wherein being made by rotating crab-bolt bar (2) relative to expander (7)
Expander (7) is moved on the longitudinal direction of crab-bolt bar (2) and can be pulled into expansion
Thus set (8) the inside simultaneously extends expansion sleeve (8), wherein the expansion sleeve (8)
With the pawl with cutting blade (15) outwardly, they are in expansion sleeve (8) in hole
(23) hole wall (25) the inside, crab-bolt bar (2) tool are squeezed into during the extension of the inside
There is a bearing (10) for being used for expansion sleeve (8), it is when expander (7) are drawn in
Axially supporting expansion sleeve (8), and the rotary part (6) and crab-bolt bar (2)
Rear thread (3) be have torque and will be than crab-bolt bar (2) to expander (7)
On bigger torque be delivered on crab-bolt bar (2).
2. expansion anchor as claimed in claim 1, it is characterised in that the crab-bolt bar
(2) with a tool seat (27), for by shape sealed anti-rotationally setting tool
Go up in its back-end.
3. expansion anchor as claimed in claim 1, it is characterised in that the expander
(8) when hole (23) the inside extends by drawing in expander (7) in the vertical
Motion.
4. expansion anchor as claimed in claim 3, it is characterised in that the expansion sleeve
(8) motion reality of the pawl (14) by expansion sleeve (8) in extension in the vertical
Cutting inside present hole wall (25), it is in the axial direction of hole (23) than pawl (14)
Thickness it is longer.
5. expansion anchor as claimed in claim 1, it is characterised in that the cutting blade (15)
It is blunt.
6. expansion anchor as claimed in claim 1, it is characterised in that the cutting blade (15)
The segmentation (18,19) for extending with circular arc or extending on chord line.
7. expansion anchor as claimed in claim 1, it is characterised in that the expansion sleeve
(8) gap (11) by extending in the vertical is divided into expansion arc (12).
8. expansion anchor as claimed in claim 1, it is characterised in that the expansion sleeve
And/or expander (7) is with least one anti-rotation member (22) outwardly (8).
9. expansion anchor as claimed in claim 1, it is characterised in that the expander
(7) and/or expansion sleeve (8) with one increase friction device (28), it increase
Plus the friction between expander (7) and expansion sleeve (8), expand in expansion sleeve (8)
Zhan Shi.
10. expansion anchor as claimed in claim 9, it is characterised in that the expander
(7) with a plucking and/or a protuberance as the part for increasing friction, they so set
Put, when expansion sleeve extends, expansion sleeve (8) is contacted plucking and/or protuberance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510988886.XA CN106917799A (en) | 2015-12-24 | 2015-12-24 | A kind of expansion anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510988886.XA CN106917799A (en) | 2015-12-24 | 2015-12-24 | A kind of expansion anchor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106917799A true CN106917799A (en) | 2017-07-04 |
Family
ID=59460158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510988886.XA Pending CN106917799A (en) | 2015-12-24 | 2015-12-24 | A kind of expansion anchor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106917799A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108360306A (en) * | 2018-05-02 | 2018-08-03 | 宁波曙翔新材料股份有限公司 | II type track plates rebar fastening system pins of CRTS and pin component |
| CN110700254A (en) * | 2019-10-11 | 2020-01-17 | 常熟市双力金属制品有限责任公司 | Sleeve bolt anchor rod installation component capable of being quickly fastened and installed |
-
2015
- 2015-12-24 CN CN201510988886.XA patent/CN106917799A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108360306A (en) * | 2018-05-02 | 2018-08-03 | 宁波曙翔新材料股份有限公司 | II type track plates rebar fastening system pins of CRTS and pin component |
| CN110700254A (en) * | 2019-10-11 | 2020-01-17 | 常熟市双力金属制品有限责任公司 | Sleeve bolt anchor rod installation component capable of being quickly fastened and installed |
| CN110700254B (en) * | 2019-10-11 | 2021-11-05 | 常熟市双力金属制品有限责任公司 | Sleeve bolt anchor rod installation component capable of being quickly fastened and installed |
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Application publication date: 20170704 |
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| WD01 | Invention patent application deemed withdrawn after publication |