CN206702692U - A kind of self-centering structure for blank hole with small diameter - Google Patents
A kind of self-centering structure for blank hole with small diameter Download PDFInfo
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- CN206702692U CN206702692U CN201720248359.XU CN201720248359U CN206702692U CN 206702692 U CN206702692 U CN 206702692U CN 201720248359 U CN201720248359 U CN 201720248359U CN 206702692 U CN206702692 U CN 206702692U
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- housing
- hole
- self
- inner chamber
- small diameter
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Abstract
The utility model discloses a kind of self-centering structure for blank hole with small diameter, including housing, ring cloth is provided with three locating pieces that can radially slide centered on vertical axis in the inner chamber of housing, the upper end of housing is provided with the locating dowel of top, the upper notch of three connection housing cavities is equipped with the outer peripheral face of locating dowel, provided with that can be passed through after sliding in and out, upper notch is outwardly directed to lean portion to locating piece, the piston that can be slid vertically is installed in the inner chamber of housing, the piston rod for stretching to top is connected with piston, the top of piston rod is provided with three drive surfaces for being used to drive locating piece to slide, drive surface is gradual outward-dipping inclined-plane from top to bottom, the bottom of housing is communicated with the oil-through-hole of its inner chamber, the back-moving spring that piston can be driven to move downward is installed in the inner chamber of housing.The utility model can be used for the positioning of minor diameter blank hole, have reliable, accurate positioning, good, easy to operate, wide adaptability the beneficial effect of rigidity.
Description
Technical field
It the utility model is related to a kind of self-centering structure for blank hole with small diameter.
Background technology
The positioning processing of minor diameter blank hole is frequently involved in machining field, due to blank hole casting accuracy reason, blank
Hole and clamp locating pin fit clearance are uncontrollable, cause positioning precision not ensure.It is more using the self-centering dress of ball type that rises at present
Put or common drift promotes pin-type load Self-centering device to position workpiece blank hole.
Rise ball type Self-centering device, and this structure moves forward by using oil cylinder extending action, promotion centering push rod,
Steel ball is promoted to be displaced outwardly indirectly, heart action is made in realization by oneself, and during return, centering push rod is returned to original position by oil cylinder, now steel ball
In free state, fallen by workpiece, steel ball is pushed back into original position.It is small in positioning workpiece using the ball type Self-centering device that rises
During diameter blank hole, minor diameter steel ball need to be selected, so available restricted driving journey position of steel ball is smaller, is being fitted without the feelings of workpiece
Under condition, when heart action is made in execution by oneself, it may appear that the phenomenon that steel ball drops, cause workpiece not to be accurately positioned, lose adding for workpiece
The problem of work precision.
Common drift promotes pin-type load Self-centering device, and this structure promotes centering to push away by using oil cylinder extending action
Bar moves forward, and is displaced outwardly by push rod slope driving pin, and heart action is made in realization by oneself, and during return, centering push rod is by oil
Cylinder is returned to original position, and pin can be returned to original position by dovetail groove on push rod of feeling relieved, or by compression spring, by pin push back to
It is in situ.Pin-type load Self-centering device is promoted using common drift, is limited, is generally used for by the centering physical dimension such as push rod and pin
Larger diameter hole is positioned, and small diameter bore positioning difficulty or ease are realized.
The content of the invention
The purpose of this utility model is in view of the deficienciess of the prior art, providing a kind of minor diameter blank hole makes scheming by oneself
Structure, for carrying out accurate, reliable positioning to minor diameter blank hole.
To reach above-mentioned purpose, the utility model includes housing, and it is structurally characterized in that in the inner chamber of the housing with vertical
Ring cloth is provided with three locating pieces that can radially slide centered on axis, and the upper end of housing is provided with the locating dowel of top,
Be equipped with the outer peripheral face of locating dowel three connection housing cavity upper notch, locating piece be provided with slide in and out after can pass through
Upper notch is outwardly directed to lean portion, and the piston that can be slid vertically is provided with the inner chamber of housing, is connected with and stretches on piston
The piston rod of top, the top of piston rod are provided with three drive surfaces for being used to drive locating piece to slide, and drive surface is from top to bottom
Gradually outward-dipping inclined-plane, the bottom of housing are communicated with the oil-through-hole of its inner chamber, and being provided with the inner chamber of housing to drive
The back-moving spring that piston moves downward.
The housing includes matrix, top cover, bottom, the endoporus of up/down perforation is provided with matrix, top cover, bottom block respectively
At the upper and lower opening of matrix endoporus and the inner chamber of housing is consequently formed, the locating dowel is to be located at the projection at the top of top cover, institute
Oil-through-hole is stated to be located on bottom.
The top cover is provided with downward opening inner chamber, and the side wall of top cover is provided with three inside and outside installation chutes of connection,
Three locating pieces are each arranged in corresponding installation chute, and installation chute forms the upper slot through locating dowel outer peripheral face
Mouthful.
The portion of leaning is the male part for being located at locating piece top, and the lateral surface for leaning portion is arc surface.
The top surface of the top cover is circular conical surface, and the installation chute forms top notch through the top surface of top cover, described fixed
Dustproof sheet is installed on the block of position, dustproof sheet is located at the notch of top.
The top cover is collectively forming three circles with being respectively equipped with three half slots, top cover on matrix with the half slot on matrix
Shape pilot hole, the bottom of locating piece are connected with lead, and lead is inserted into corresponding round guide hole.
The middle part of described matrix is provided with adpting flange, and ring is furnished with multiple connecting holes on adpting flange.
The adpting flange is provided with dowel hole.
The top ring of the piston rod is furnished with three power slide ways, and three locating pieces each correspond to a power slide way, fixed
The corresponding site of position block is inserted into power slide way, and the bottom surface of power slide way forms the drive surface.
The utility model can be fixed to during use in frock, oil-through-hole connection hydraulic oil source, piston is upward when oil-filled
Motion, piston rod rise, and promote locating piece to be allowed to slide by angularly disposed drive surface, thus drive three locating pieces outwards to support
Open, the portion that leans on locating piece contacts with workpiece blank hole inwall, realizes self-centering positioning.When self-centering positioning action terminates
When, external hydraulic oil pressure reduces, and back-moving spring drives piston reset, and piston rod declines therewith, and the portion that leans on locating piece can
It is retracted into upper notch.Housing includes matrix, top cover, bottom, can be easy to processing of the present utility model, group using trimeric structure
Dress.Top cover is provided with downward opening inner chamber, and the side wall of top cover is provided with installation chute, and locating piece is arranged in installation chute,
Installation chute is used to accommodate locating piece, and upper notch is therefrom protruding for the portion of leaning.The portion of leaning is to be located at locating piece top
Male part, the lateral surface for leaning portion is arc surface, and when locating piece slides in and out, only the portion of leaning is higher by the outer surface of top cover, fixed
The other parts of position block will not cause to interfere, after the portion of leaning outwards struts, inwall phase of three arc surfaces with workpiece blank hole
Contact, thereby guarantee that the accurate, stably of positioning.The top surface of top cover is circular conical surface, and installation chute forms top through the top surface of top cover
Portion's notch, dustproof sheet is installed on locating piece, dustproof sheet is located at the notch of top, and when locating piece slides, dustproof sheet, which blocks, to be pushed up
At portion's notch, it can prevent iron filings, dust from entering in the inner chamber of housing.Top cover is collectively forming three circles with the half slot on matrix
Shape pilot hole, lead is connected with locating piece, lead is inserted into round guide hole, and round guide hole has to lead
Guide effect, it is ensured that locating piece can only be slided radially.The middle part of matrix is provided with adpting flange, and ring is furnished with multiple on adpting flange
Connecting hole, adpting flange are provided with dowel hole, and the structure is used to connect with frock, has accurate positioning, what is be connected firmly is excellent
Point.Piston rod is provided with power slide way, and power slide way is engaged with locating piece, under the contact action of drive surface, three positioning
Block can be slided radially simultaneously, it is ensured that the uniformity of workpiece small size blank hole repetitive positioning accuracy.
The utility model can be used for the positioning of minor diameter blank hole in summary, have reliable, accurate positioning, rigidity it is good,
Easy to operate, wide adaptability beneficial effect.
Brief description of the drawings
Specific embodiment of the present utility model is further described in detail below in conjunction with the accompanying drawings：
Fig. 1 is a kind of structural representation of embodiment of the present utility model；
Fig. 2 is Fig. 1 top view；
Fig. 3 is the structural representation after Fig. 1 is splitted；
Fig. 4 is the structural representation of top cover in Fig. 1；
Fig. 5 is the structural representation of locating piece and lead in Fig. 1；
Fig. 6 is the structural representation of piston and piston rod in Fig. 1.
Embodiment
Referring to figs. 1 to Fig. 3, the self-centering structure for blank hole with small diameter includes housing 1, and the upper end of housing 1 is provided with
The locating dowel 3 of side, locating dowel 3 can be plugged into the blank hole of workpiece, and the top of locating dowel 3 is smooth curved surface, in order to which its is suitable
Profit enters blank hole, and the bottom of housing 1 is communicated with the oil-through-hole 9 of its inner chamber.Housing 1 includes matrix 11, top cover 12, bottom
13, the interior endoporus for being provided with up/down perforation of matrix 11, top cover 12, bottom 13 block at the upper and lower opening of the endoporus of matrix 11 respectively
And it is consequently formed the inner chamber of housing 1.The top surface of matrix 11 is pressed close in the bottom surface of top cover 12, and carrying out angle by cylindrical pin with internal thread 23 determines
Position, is fixed by soket head cap screw 24.Bottom 13 is arranged on the bottom of matrix 11, is consolidated by soket head cap screw 24
It is fixed.The upper surface of bottom 13 is provided with annular groove 26, and annular groove 26 has sealing function built with O-ring, O-ring.Locating dowel 3
To be located at the projection at the top of top cover 12, oil-through-hole 9 is located on bottom 13, and oil-through-hole 9 is provided with the internal thread for connected pipes.
The middle part of matrix 11 is provided with adpting flange 19, and ring is furnished with multiple connecting holes 20 for being used to connect positioning tool on adpting flange 19,
Adpting flange 19 is provided with dowel hole 21.In the inner chamber of housing 1 centered on vertical axis ring cloth be provided with three can be along footpath
To the locating piece 2 of slip, the upper notch 4 of three connection housing 1 inner chambers are equipped with the outer peripheral face of locating dowel 3, on locating piece 2
Provided with that can be passed through after sliding in and out, upper notch 4 is outwardly directed to lean portion 5.Being provided with the inner chamber of housing 1 to slide vertically
Piston 6, the piston rod 7 for stretching to top is connected with piston 6, being provided with the inner chamber of housing 1 can drive piston 6 to move downward
Back-moving spring 10.Back-moving spring 10 is sleeved on piston rod 7, and the lower end of back-moving spring 10 is acted against on the upper surface of piston 6,
The endoporus of matrix 11 is stepped hole, and the upper end of back-moving spring 10 is acted against on the step surface of stepped hole, and back-moving spring 10 can use
Rectangular Spring, common cylinder helical spring can also be used.The top of piston rod 7 is provided with three and is used to drive locating piece 2 to slide
Drive surface 8, drive surface 8 is gradual outward-dipping inclined-plane from top to bottom.
The occupation mode of the self-centering structure for blank hole with small diameter is as follows：Matrix 11 passes through outer peripheral face and adpting flange 19
Bottom surface is located by connecting with frock, and alignment pin is can be inserted into dowel hole 21, and angle positioning, connecting hole 20 are carried out by alignment pin
In can be inserted into fastening bolt 25, matrix 11 is fixed in frock using fastening bolt 25.Oil-through-hole 9 connects hydraulic oil source, fills
Piston 6 moves upwards when oily, and piston rod 7 rises, and promotes locating piece 2 to be allowed to slide by angularly disposed drive surface 8, thus drives
Three locating pieces 2 outwards strut simultaneously, and the portion 5 that leans on locating piece 2 contacts with workpiece blank hole inwall, and it is self-centering fixed to realize
Position.At the end of self-centering positioning action, external hydraulic oil pressure reduces, and back-moving spring 10 drives piston 6 to reset, piston rod 7
Decline therewith, the portion 5 that leans on locating piece 2 is retractable into upper notch 4.The self-centering structure for blank hole with small diameter structure can
Lean on, accurate positioning, rigidly good, easy to operate, wide adaptability.
Reference picture 3, Fig. 4, top cover 12 are provided with downward opening inner chamber, and the side wall of top cover 12 is provided with inside and outside three connections
Installation chute 14, three locating pieces 2 are each arranged in corresponding installation chute 14, and installation chute 14 is through outside locating dowel 3
Side face forms foregoing upper notch 4.Installation chute 14 is used to accommodate locating piece 2, installs the upper notch 4 on chute 14 for top
Relying part 5 is therefrom protruding.The top surface of top cover 12 is circular conical surface, and installation chute 14 forms top notch through the top surface of top cover 12
15, dustproof sheet 16 is installed on locating piece 2, dustproof sheet 16 is located at top notch 15.When locating piece 2 slides, dustproof sheet 16 hides
Gear can prevent iron filings, dust from entering in the inner chamber of housing 1 at top notch 15.
Reference picture 3, Fig. 4, Fig. 5, are respectively equipped with three half slots 17 on top cover 12 and matrix 11, top cover 12 with matrix 11
Half slot be collectively forming three round guide holes, the bottom of locating piece 2 is connected with lead 18, and lead 18 is inserted into accordingly
Round guide hole in.Round guide hole has guide effect to lead 18, it is ensured that locating piece 2 can only be slided radially.
Reference picture 3, Fig. 5, it is the male part for being located at the top of locating piece 2 to lean portion 5, and the lateral surface for leaning portion 5 is arc surface.
When locating piece 2 slides in and out, the outer surface that portion 5 is higher by top cover 12 is only leaned, the other parts of locating piece 2 will not cause to do
Relate to.The lateral surface for leaning portion 5 is arc surface, after the portion of leaning outwards struts, inwall phase of three arc surfaces with workpiece blank hole
Contact, thereby guarantee that the accurate, stably of positioning.
Reference picture 3, Fig. 6, the top ring of piston rod 7 are furnished with three power slide ways 22, and three locating pieces 2 are each corresponding one
Power slide way 22, the corresponding site of locating piece 2 are inserted into power slide way 22, and the bottom surface of power slide way 22 forms above-mentioned drive surface
8.Power slide way 22 is engaged with locating piece 2, and under the contact action of drive surface 8, three locating pieces 2 can be slided radially simultaneously
It is dynamic, ensure three outermosts for leaning portion 5 on same circumference, it is ensured that workpiece small size blank hole repetitive positioning accuracy it is consistent
Property.
In summary, the utility model is not limited to above-mentioned embodiment.Those skilled in the art, this reality is not being departed from
On the premise of with new spirit and scope, some change and modification can be done, it is new that all these changes all should fall into this practicality
The protection domain of type.
Claims (9)
1. a kind of self-centering structure for blank hole with small diameter, including housing（1）, it is characterized in that the housing（1）Inner chamber in perpendicular
Ring cloth is provided with three locating pieces that can radially slide centered on to axis（2）, housing（1）Upper end be provided with top
Locating dowel（3）, locating dowel（3）Outer peripheral face on be equipped with three connection housings（1）The upper notch of inner chamber（4）, locating piece（2）
Upper notch can be passed through by being provided with after sliding in and out（4）It is outwardly directed to lean portion（5）, housing（1）Inner chamber in energy is installed
The piston slid vertically（6）, piston（6）On be connected with stretch to top piston rod（7）, piston rod（7）Top be provided with three
For driving locating piece（2）The drive surface of slip（8）, drive surface（8）For gradual outward-dipping inclined-plane from top to bottom, housing
（1）Bottom be communicated with the oil-through-hole of its inner chamber（9）, housing（1）Inner chamber in be provided with and can drive piston（6）Move downward
Back-moving spring（10）.
2. self-centering structure for blank hole with small diameter according to claim 1, it is characterized in that the housing（1）Including matrix
（11）, top cover（12）, bottom（13）, matrix（11）The interior endoporus provided with up/down perforation, top cover（12）, bottom（13）Block respectively
In matrix（11）At the upper and lower opening of endoporus and it is consequently formed housing（1）Inner chamber, the locating dowel（3）To be located at top cover
（12）The projection at top, the oil-through-hole（9）It is located at bottom（13）On.
3. self-centering structure for blank hole with small diameter according to claim 2, it is characterized in that the top cover（12）It is provided with and opens
The inner chamber of mouth down, top cover（12）Side wall be provided with three inside and outside installation chutes of connection（14）, three locating pieces（2）Each
Installed in corresponding installation chute（14）It is interior, chute is installed（14）Through locating dowel（3）Outer peripheral face forms the upper notch
（4）.
4. self-centering structure for blank hole with small diameter according to claim 3, it is characterized in that described lean portion（5）It is fixed to be located at
Position block（2）The male part on top, leans portion（5）Lateral surface be arc surface.
5. self-centering structure for blank hole with small diameter according to claim 3, it is characterized in that the top cover（12）Top surface be
Circular conical surface, the installation chute（14）Through top cover（12）Top surface formed top notch（15）, the locating piece（2）Upper installation
There is dustproof sheet（16）, dustproof sheet（16）Positioned at top notch（15）Place.
6. self-centering structure for blank hole with small diameter according to claim 2, it is characterized in that the top cover（12）With matrix
（11）On be respectively equipped with three half slots（17）, top cover（12）With matrix（11）On half slot be collectively forming three and circular be oriented to
Hole, locating piece（2）Bottom be connected with lead（18）, lead（18）It is inserted into corresponding round guide hole.
7. self-centering structure for blank hole with small diameter according to claim 2, it is characterized in that described matrix（11）Middle part set
There is adpting flange（19）, adpting flange（19）Upper ring is furnished with multiple connecting holes（20）.
8. self-centering structure for blank hole with small diameter according to claim 7, it is characterized in that the adpting flange（19）On set
There is dowel hole（21）.
9. according to the self-centering structure for blank hole with small diameter described in any one of claim 1 to 8 claim, it is characterized in that institute
State piston rod（7）Top ring be furnished with three power slide ways（22）, three locating pieces（2）Each corresponding power slide way
（22）, locating piece（2）Corresponding site be inserted into power slide way（22）In, power slide way（22）Bottom surface form the drive surface
（8）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720248359.XU CN206702692U (en) | 2017-03-15 | 2017-03-15 | A kind of self-centering structure for blank hole with small diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720248359.XU CN206702692U (en) | 2017-03-15 | 2017-03-15 | A kind of self-centering structure for blank hole with small diameter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206702692U true CN206702692U (en) | 2017-12-05 |
Family
ID=60469705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720248359.XU Active CN206702692U (en) | 2017-03-15 | 2017-03-15 | A kind of self-centering structure for blank hole with small diameter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206702692U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108274392A (en) * | 2017-12-11 | 2018-07-13 | 歌尔股份有限公司 | Clamping and positioning device |
| CN108955500A (en) * | 2018-08-01 | 2018-12-07 | 山东威达粉末冶金有限公司 | Hole central positioner |
| CN115194529A (en) * | 2022-09-15 | 2022-10-18 | 河北力准机械制造有限公司 | Inner hole fine boring centering mechanism and inner hole fine boring machine tool applying same |
-
2017
- 2017-03-15 CN CN201720248359.XU patent/CN206702692U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108274392A (en) * | 2017-12-11 | 2018-07-13 | 歌尔股份有限公司 | Clamping and positioning device |
| CN108274392B (en) * | 2017-12-11 | 2020-03-24 | 歌尔股份有限公司 | Clamping and positioning device |
| CN108955500A (en) * | 2018-08-01 | 2018-12-07 | 山东威达粉末冶金有限公司 | Hole central positioner |
| CN115194529A (en) * | 2022-09-15 | 2022-10-18 | 河北力准机械制造有限公司 | Inner hole fine boring centering mechanism and inner hole fine boring machine tool applying same |
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