CN206523364U - A kind of contact fatigue sample fixing device - Google Patents
A kind of contact fatigue sample fixing device Download PDFInfo
- Publication number
- CN206523364U CN206523364U CN201621472028.6U CN201621472028U CN206523364U CN 206523364 U CN206523364 U CN 206523364U CN 201621472028 U CN201621472028 U CN 201621472028U CN 206523364 U CN206523364 U CN 206523364U
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- sample
- axle
- thread hole
- sample axle
- nut
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Abstract
The utility model discloses a kind of contact fatigue sample fixing device, material tests field, including nut, sample axle, the nut center is provided with major thread hole, major thread is evenly equipped with minor thread hole outside hole, sample axle is the stepped multi-diameter shaft of setting, the end of sample axle is provided with screw buckle, sample axle passes through on major thread hole, screw buckle coupling nut, tested test specimens are sleeved on sample axle and leaned against on the sample axle ladder shaft shoulder by expansion set, and the screw for holding out against sample is provided with minor thread hole.In use, tested test specimens are sleeved on sample axle and leaned against on the sample axle ladder shaft shoulder by expansion set, in the screw buckle that nut is screwed in sample axle, boss holds out against expansion set to sample and sample axle and is connected firmly.The utility model connects sample and axle using tension force, it is to avoid the test data that original sample axial end disconnected pin is caused is invalid, and sample axle grinds the phenomenon that wound is scrapped.
Description
Technical field
The utility model is related to a kind of contact fatigue sample fixing device, belongs to material tests field.
Background technology
Contact fatigue be workpiece such as roll, gear, bearing, rail etc. surface contact compression it is long-term constantly repeatedly
Effect it is lower can caused by a kind of surface fatigue breakoff phenomenon, show as contact surface and crackle, pit or fatigue flake occur into recessed
Hole, so as to be part rejection.Therefore the material for making the parts such as roll, gear, bearing, rail is typically required to do tired examination
Test., it is necessary to which the material of sampling is made into fatigue test sample during to metal material progress fatigue test.Provided in GB 10622
Four kinds of contact fatigue samples and two kinds of contact fatigues accompany sample, and wherein JP-1, JP-2, JP-3, PS-1 uses endoporus 30mm examination
The 30mm of sample and testing machine sample axle carries out gap cooperation, and sample shaft end installs the taper pin of 5mm diameters, inserts sample end face
5mm holes in transmit moment of torsion.To ensure radial beat eccentricity less than 0.03mm of the sample in operation process, to the chi of sample
Very little tolerance and form and position tolerance degree proposes very high requirement.In actual moving process, it occur frequently that taper pin fracture accident, is caused
With axle sliding friction occurs for sample, and experiment is cancelled, and sample axle grinds wound, loses precision, and sample fastening reliability is poor, influence fatigue examination
The progress tested.
Utility model content
The utility model technical issues that need to address are to provide a kind of contact fatigue sample fixing device, using this dress
Put, in the case of guarantee test precision, sample requirement on machining accuracy can be reduced, it is to avoid the accident that sample axle grinds wound occurs.
In order to solve the above technical problems, the technical scheme that the utility model is used is：
A kind of contact fatigue sample fixing device, including nut, sample axle, the nut center are provided with major thread
Minor thread hole is evenly equipped with outside hole, major thread hole, sample axle is sets stepped multi-diameter shaft, and the end of sample axle is provided with screw thread
Button, sample axle is by the way that on major thread hole, screw buckle coupling nut, tested test specimens are sleeved on sample axle and leaned against by expansion set
On the sample axle ladder shaft shoulder, the screw for holding out against sample is provided with minor thread hole.
Technical solutions of the utility model further improvement is that：Between the minor thread hole of nut and major thread hole be provided with
The corresponding boss of expansion set.
Technical solutions of the utility model further improvement is that：Boss is annular shape；The screw buckle of sample shaft end is straight
Footpath is less than the sample shaft diameter for installing sample position.
Technical solutions of the utility model further improvement is that：Expansion set, which is reached the standard grade, is cut with the wide axial gap of 2mm.
Technical solutions of the utility model further improvement is that：Expansion set is three groups.
Technical solutions of the utility model further improvement is that：Sample diameter of bore is 35mm.
By adopting the above-described technical solution, the technological progress that the utility model is obtained is：After being connected using expansion set, pass through
The automatic same heart function of expansion set, reduces circular runout, the tolerance range of sample endoporus caused by the direct gap of original axis hole coordinates
It can substantially reduce, reduce the dimensional tolerance and Geometrical Tolerance Principle of sample processing, reduce sample processing cost；Using tension force
Connect sample and axle, it is to avoid the test data that original sample axial end disconnected pin is caused is invalid, and sample axle grinds the phenomenon that wound is scrapped.
Brief description of the drawings
Fig. 1 is the utility model structural representation；
Wherein, 1, screw, 2, nut, 3, sample, 4, sample axle, 5, expansion set, 6, boss, 7, minor thread hole, 8, big spiral shell
Pit, 9, screw buckle.
Embodiment
The utility model is described in further details with reference to embodiment：
As shown in figure 1, a kind of contact fatigue sample fixing device, including nut 2, sample axle 4, the centre bit of nut 2
Install and minor thread hole 7 is evenly equipped with outside major thread hole 8, major thread hole 8, sample axle 4 is the stepped multi-diameter shaft of setting, sample
The end of axle 4 is provided with screw buckle 9, and sample axle 4 is by the way that on major thread hole 8, the coupling nut 2 of screw buckle 9, tested test specimens 3 pass through
Expansion set 5 is sleeved on sample axle 4 and leaned against on the ladder shaft shoulder of sample axle 4, and the screw for holding out against sample 3 is provided with minor thread hole 7
Nail 1.
In use, tested test specimens 3 are sleeved on sample axle 4 and leaned against on the ladder shaft shoulder of sample axle 4 by expansion set 5, will
Nut 2 is screwed in the screw buckle 9 of sample axle 4, and boss 6 holds out against expansion set 5 to sample 3 and sample axle 4 and is connected firmly, test sample 3
Circular runout, less than 0.03mm, then the screw 1 on rotary nut 2, props up sample 3.The utility model has to be connected using expansion set
After connecing, by the automatic same heart function of expansion set, circular runout, sample endoporus caused by the direct gap of original axis hole coordinates are reduced
Tolerance range can substantially reduce, reduce sample processing dimensional tolerance and Geometrical Tolerance Principle, reduce sample processing cost；Adopt
Sample and axle are connected with tension force, it is to avoid the test data that original sample axial end disconnected pin is caused is invalid, and sample axle grinds wound report
Useless phenomenon.
Claims (6)
1. a kind of contact fatigue sample fixing device, it is characterised in that：Including nut（2）, sample axle（4）, the nut（2）In
Heart position is provided with major thread hole（8）, major thread hole（8）Outside is evenly equipped with minor thread hole（7）, sample axle（4）To be provided with ladder
Multi-diameter shaft, sample axle（4）End be provided with screw buckle（9）, sample axle（4）Pass through major thread hole（8）, screw buckle（9）Connection
Nut（2）On, it is detected test specimens（3）Pass through expansion set（5）It is sleeved on sample axle（4）Go up and lean against sample axle（4）On the ladder shaft shoulder,
Minor thread hole（7）Inside it is provided with and holds out against sample（3）Screw（1）.
2. a kind of contact fatigue sample fixing device according to claim 1, it is characterised in that：Nut（2）Minor thread
Hole（7）With major thread hole（8）Between be provided with and expansion set（5）Corresponding boss（6）.
3. a kind of contact fatigue sample fixing device according to claim 2, it is characterised in that：Boss（6）For annular shape；
Sample axle（4）The screw buckle of end（9）Diameter, which is less than, installs sample（3）The sample axle of position（4）Diameter.
4. a kind of contact fatigue sample fixing device according to claim 1, it is characterised in that：The expansion set（5）Reach the standard grade
It is cut with the wide axial gap of 2mm.
5. a kind of contact fatigue sample fixing device according to claim 1, it is characterised in that：The expansion set（5）For three
Group.
6. according to a kind of any described contact fatigue sample fixing devices of claim 1-5, it is characterised in that：The sample
（3）Diameter of bore is 35mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621472028.6U CN206523364U (en) | 2016-12-30 | 2016-12-30 | A kind of contact fatigue sample fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621472028.6U CN206523364U (en) | 2016-12-30 | 2016-12-30 | A kind of contact fatigue sample fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206523364U true CN206523364U (en) | 2017-09-26 |
Family
ID=59887802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621472028.6U Active CN206523364U (en) | 2016-12-30 | 2016-12-30 | A kind of contact fatigue sample fixing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206523364U (en) |
-
2016
- 2016-12-30 CN CN201621472028.6U patent/CN206523364U/en active Active
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