CN208913943U - A kind of expansion mechanism - Google Patents
A kind of expansion mechanism Download PDFInfo
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- CN208913943U CN208913943U CN201821667946.3U CN201821667946U CN208913943U CN 208913943 U CN208913943 U CN 208913943U CN 201821667946 U CN201821667946 U CN 201821667946U CN 208913943 U CN208913943 U CN 208913943U
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- housing
- swelling
- expansion
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- cylinder
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Abstract
The utility model relates to test fixture technical fields, disclose a kind of expansion mechanism.The expansion mechanism includes fixed plate, swelling cylinder and expansion set component, and the swelling cylinder is set in the fixed plate；The expansion set component includes strength pull rod, wedge-shaped expansion core and housing；One end of the strength pull rod connects the extension end of the swelling cylinder, and the other end is connected to wedge-shaped expansion core；The housing is sheathed on outside the strength pull rod and the wedge-shaped expansion core, and the housing is provided with multiple gap far from one end of the swelling cylinder；The swelling cylinder is shunk, and is driven the wedge-shaped expansion core to retract, is made the inner hole swelling on the housing and workpiece.The utility model is able to solve clamping problem existing for some special-shaped parts in the prior art.
Description
Technical field
The utility model relates to test fixture technical field more particularly to a kind of expansion mechanisms.
Background technique
For some contour structures complexity and inner hole is had, when being not easy the workpiece clamped or contour structure size Datong District
Workpiece with inner hole, or the workpiece of the center decentraction of inner hole and workpiece having, there are also the small thin-walleds of some sizes
Part, or the workpiece more demanding to presentation quality, detect the workpiece of mentioned kind, in test or process,
It is inconvenient that clamping is carried out to outer surface.
Meanwhile to the clamping heavy workload of workpiece in production line, and to the poor accuracy of piece-holder position, subsequent tune
Whole difficulty, time-consuming.
Utility model content
The purpose of this utility model is to provide a kind of expansion mechanisms, ask for solving the clamping of the workpiece of the above-mentioned type
Topic.
For this purpose, the utility model uses following technical scheme:
A kind of expansion mechanism, including fixed plate, swelling cylinder and expansion set component are provided, the swelling cylinder is set to described
In fixed plate；
The expansion set component includes strength pull rod, wedge-shaped expansion core and housing；One end connection of the strength pull rod is described swollen
The extension end of tight cylinder, the other end are connected to wedge-shaped expansion core；
The housing is sheathed on outside the strength pull rod and the wedge-shaped expansion core, and the housing is far from the swelling cylinder
One end is provided with multiple gap；
The swelling cylinder is shunk, and is driven the wedge-shaped expansion core to retract, is made the inner hole swelling on the housing and workpiece.
Preferably, the wedge-shaped expansion core includes rake, and the rake is the frustum of a cone, and the frustum of a cone is far from described swollen
The diameter of tight cylinder one end is greater than it close to the diameter of swelling cylinder one end, and the inner wall of the rake and the housing connects
Touching.
Preferably, the gap runs through the outer wall of the housing, and is circumferentially uniformly arranged along the outer wall of the housing.
Preferably, the length direction of the gap is axial consistent with the housing.
Preferably, the gap quantity is 8-10.
Preferably, in the corresponding region of the gap length, tapered constant region and cone is arranged in the inner wall of the housing
Area is spent, the taper area is set to one end far from the swelling cylinder；
Along the direction far from the swelling cylinder, the internal diameter in the taper area is become larger.
Preferably, the range of taper in the taper area is 4 ° -6 °.
It preferably, further include positioning pin, it is described to put on the location hole being provided with through the housing, the strength pull rod outside
On be provided through strip-shaped hole, the positioning pin is arranged in the location hole and the strip-shaped hole.
Preferably, the housing is made of spring steel.
The utility model has the beneficial effects that being acted by swelling cylinders retract, pulls strength pull rod and be connected to strength and draw
Wedge-shaped expansion core on bar fallback action together, thus wedge-shaped expansion core by gap by housing distending, make the inner hole of housing and workpiece
Swelling, to realize the fixation to workpiece.Above-mentioned expansion mechanism can be used for having inner hole, but again not easy positioning part into
Row positioning, using above-mentioned swelling component to Workpiece clamping after, workpiece can be carried out torsion test or carrying out other to workpiece
Test or test.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of upper swelling component of the invention；
Fig. 2 is the schematic diagram of internal structure of upper swelling component of the invention.
In figure:
521, swelling cylinder；
522, expansion set component；5221, strength pull rod；52211, strip-shaped hole；5222, wedge-shaped expansion core；5223, housing；
52231, taper constant region；52232, taper area；52233, location hole；5224, gap；
56, fixed plate.
Specific embodiment
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, the expansion mechanism in the present embodiment includes swelling cylinder 521 and expansion set component 522.Swelling cylinder
521 are set in fixed plate 56, and the extension end of this swelling cylinder 521 is arranged vertically downwards, and extension end be connected to it is swollen
Component 522 is covered, and drives the inner hole swelling on expansion set component 522 and workpiece.
Specifically, as shown in Fig. 2, expansion set component 522 includes strength pull rod 5221, wedge-shaped expansion core 5222,5223 and of housing
Positioning pin.
Wherein, one end of strength pull rod 5221 is connected to the extension end of swelling cylinder 521, the other end of strength pull rod 5221
It is connected to wedge-shaped expansion core 5222, wedge-shaped expansion core 5222 is the frustum of a cone, and more upward along the vertical direction, the diameter of the frustum of a cone is smaller.Circle
The tilt angle of frustum is 4-6 °, preferably 4 ° in the present embodiment.
The upper end of housing 5223 is fixedly connected on the lower section of fixed plate 56, and strength pull rod 5221 is arranged in housing 5223
Portion can move back and forth along the vertical direction relative to housing 5223.
Several gap 5224, the opening setting of gap 5224 are circumferentially provided in the lower end edge housing 5223 of housing 5223
In the lower end of housing 5223.In the length range of gap 5224, the inner wall of housing 5223 include taper constant region 52231 and with
Taper area 52232, taper area 52232 are arranged close to the lower end of housing 5223, specifically, outside 5223 taper area 52232 of housing
5223 internal diameters are covered, vertically downwards, internal diameter becomes larger.
Preferably, gap 5224 is uniformly arranged along housing 5223 is circumferential, the length of gap 5224 determine according to actual needs,
Quantity selection 8-10 of gap 5224, the quantity of gap 5224 selects 8 in the present embodiment.The number of above-mentioned selection gap 5224
Amount is overall stiffness and intensity that 8 are to guarantee housing 5223, because housing 5223 is made of spring steel, swelling gas
Cylinder 521 can make the lower end of housing 5223 be shrunk to normal condition after releasing strength pull rod 5221.When 5224 quantity of gap is excessive
When, the intensity of 5223 lower end of housing is too small, easily leads to the plastic deformation of housing 5223；When quantity is very little, 5223 lower end of housing
Hardness is excessive, and wedge-shaped expansion core 5222 is not easy to make its deformation.Simultaneously, additionally it is possible to be not in after guaranteeing housing 5223 and workpiece swelling
It is circumferentially displaced.
After in the inner hole for the gear that housing 5223 and wedge-shaped expansion core 5222 protrude into above-mentioned workpiece, swelling cylinder 521 is driven
Strength pull rod 5221 pull wedge-shaped expansion core 5222 to recycling contract, wedge-shaped expansion core 5222 obviously be by wedge shape tapered surface come by
Power.Wedge-shaped expansion core 5222 drives 5223 distending of housing, thus with bore swelling.The working principle of above-mentioned expansion set component 522
Are as follows: the mutual frictional force sliding of the inner conical surface of housing 5223 and the male cone (strobilus masculinus) of wedge-shaped expansion core 5222 generates biggish tension force, from
And it is capable of the inner hole of swelling workpiece.
The relative displacement of wedge-shaped expansion core 5222 and housing 5223 generates powerful clamping force, and the place of core is exactly two wedges
The mutual movement in shape face generates the amplification variation of radial displacement, the size of the tension force of swelling component (i.e. upper swelling component 52)
It is determined by the interior wedge tapers of housing 5223 and the outer wedge tapers of wedge-shaped expansion set, if necessary to greater or lesser
Dynamics needs to adjust the taper size of the two cooperation.
In addition, strength pull rod 5221 is circumferentially rotated relative to housing 5223 in order to prevent, it is additionally provided on expansion set component 522
Positioning pin is provided with location hole 52233 on housing 5223, and strip-shaped hole 52211 is provided through on strength pull rod 5221,
The length direction of strip-shaped hole 52211 is arranged along the axial direction of strength pull rod 5221, while the center line of strip-shaped hole 52211 and strong
Power pull rod 5221 it is central axial coplanar.Above-mentioned positioning pin, which runs through, to be inserted in location hole 52233 and strip-shaped hole 52211.
Above-mentioned swelling component can be also used for swelling positioning with inner hole and shape it is irregular, can not be positioned by shape
Workpiece can also position the workpiece of inner hole Yu shape decentraction, in addition, there are also some band inner holes, but have part-structure size compared with
Greatly, if localized external structure causes the structure size of positioning tool excessive, the big workpiece of occupied space.
In addition, swelling component can also be symmetrical above and below to be arranged or be symmetrical set using two.It can be in having
Hole, but not easy positioning part is positioned again, using above-mentioned swelling component to Workpiece clamping after, workpiece can be turned round
Turn test or other tests or test are carried out to workpiece.Such as disk part by performing, inner hole is provided on disk part by performing,
The two sides of disk are additionally provided with the prominent disk setting of Cylinder inner bore structure, in such cases, if using tooling to external disk
Part-structure is clamped fixation, such as clamping jaw, and the grip size needed is big, if in production line, it is also possible to will affect it
The space of his process.And the structure of above-mentioned swelling component is simple, meanwhile, the development cycle is short, deep to be liked by client.
Obviously, the above embodiments of the present invention is used for the purpose of clearly illustrating examples for clearly illustrating the present invention, and
It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in
Within the protection scope of the utility model claims.
Claims (9)
1. a kind of expansion mechanism, which is characterized in that including fixed plate (56), swelling cylinder (521) and expansion set component (522), institute
Swelling cylinder (521) is stated to be set on the fixed plate (56)；
The expansion set component (522) includes strength pull rod (5221), wedge-shaped expansion core (5222) and housing (5223)；The strength is drawn
One end of bar (5221) connects the extension end of the swelling cylinder (521), and the other end is connected to wedge-shaped expansion core (5222)；
The housing (5223) is sheathed on the strength pull rod (5221) and the wedge-shaped expansion core (5222) outside, the housing
(5223) one end far from the swelling cylinder (521) is provided with multiple gap (5224)；
The swelling cylinder (521) is shunk, and is driven the wedge-shaped expansion core (5222) to retract, is made on the housing (5223) and workpiece
Inner hole swelling.
2. expansion mechanism according to claim 1, which is characterized in that the wedge shape expansion core (5222) includes rake, institute
Stating rake is the frustum of a cone, and the frustum of a cone is greater than it close to the swelling far from the diameter of described swelling cylinder (521) one end
The diameter of cylinder (521) one end, the rake are contacted with the inner wall of the housing (5223).
3. expansion mechanism according to claim 1, which is characterized in that the gap (5224) runs through the housing (5223)
Outer wall, and be circumferentially uniformly arranged along the outer wall of the housing (5223).
4. expansion mechanism according to claim 3, which is characterized in that the length direction of the gap (5224) and described outer
Cover the axial consistent of (5223).
5. expansion mechanism according to claim 1, which is characterized in that gap (5224) quantity is 8-10.
6. expansion mechanism according to claim 2, which is characterized in that in the corresponding region of the gap (5224) length
Interior, tapered constant region (52231) and taper area (52232), the taper area is arranged in the inner wall of the housing (5223)
(52232) it is set to one end far from the swelling cylinder (521)；
Along the direction far from the swelling cylinder (521), the internal diameter of the taper area (52232) is become larger.
7. expansion mechanism according to claim 6, which is characterized in that the range of taper of the taper area (52232) be 4 °-
6°。
8. expansion mechanism according to claim 1, which is characterized in that further include positioning pin, set on the housing (5223)
It is equipped with the location hole (52233) through the housing (5223), is provided through strip-shaped hole on the strength pull rod (5221)
(52211), the positioning pin is arranged in the location hole (52233) and the strip-shaped hole (52211).
9. expansion mechanism according to claim 1, which is characterized in that the housing (5223) is made of spring steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821667946.3U CN208913943U (en) | 2018-10-15 | 2018-10-15 | A kind of expansion mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821667946.3U CN208913943U (en) | 2018-10-15 | 2018-10-15 | A kind of expansion mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN208913943U true CN208913943U (en) | 2019-05-31 |
Family
ID=66709342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821667946.3U Active CN208913943U (en) | 2018-10-15 | 2018-10-15 | A kind of expansion mechanism |
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| CN (1) | CN208913943U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132016A (en) * | 2018-01-09 | 2018-06-08 | 无锡富瑞德测控仪器股份有限公司 | A kind of barb hold-down mechanism applied to radiographic measurement |
| CN110103244A (en) * | 2019-06-06 | 2019-08-09 | 四川成焊宝玛焊接装备工程有限公司 | Inner hole swelling grasping mechanism |
| CN113510432A (en) * | 2021-04-16 | 2021-10-19 | 睿信泰智能科技(昆山)有限公司 | Combined assembly core expansion tool |
| CN114714530A (en) * | 2022-04-27 | 2022-07-08 | 南通伟腾半导体科技有限公司 | High-precision wafer cutting blade and cutting edge electroforming forming device thereof |
-
2018
- 2018-10-15 CN CN201821667946.3U patent/CN208913943U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132016A (en) * | 2018-01-09 | 2018-06-08 | 无锡富瑞德测控仪器股份有限公司 | A kind of barb hold-down mechanism applied to radiographic measurement |
| CN108132016B (en) * | 2018-01-09 | 2024-03-29 | 无锡富瑞德测控仪器股份有限公司 | Be applied to image measurement's barb hold-down mechanism |
| CN110103244A (en) * | 2019-06-06 | 2019-08-09 | 四川成焊宝玛焊接装备工程有限公司 | Inner hole swelling grasping mechanism |
| CN110103244B (en) * | 2019-06-06 | 2024-04-19 | 四川成焊宝玛焊接装备工程有限公司 | Inner hole expanding and grabbing mechanism |
| CN113510432A (en) * | 2021-04-16 | 2021-10-19 | 睿信泰智能科技(昆山)有限公司 | Combined assembly core expansion tool |
| CN114714530A (en) * | 2022-04-27 | 2022-07-08 | 南通伟腾半导体科技有限公司 | High-precision wafer cutting blade and cutting edge electroforming forming device thereof |
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