CN207407791U - Pin shaft fillet measuring instrument - Google Patents
Pin shaft fillet measuring instrument Download PDFInfo
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- CN207407791U CN207407791U CN201721276627.5U CN201721276627U CN207407791U CN 207407791 U CN207407791 U CN 207407791U CN 201721276627 U CN201721276627 U CN 201721276627U CN 207407791 U CN207407791 U CN 207407791U
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- hole
- rack
- measured
- axis
- fillet
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- A Measuring Device Byusing Mechanical Method (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The utility model discloses a kind of pin shaft fillet measuring instruments, including pedestal, gear train, rack spring system, hole gauge, connector and displacement measuring device, the hole gauge is equipped with the metering hole for stretching into for the axis pin round end to be measured and being interference fitted with the axis pin axle body to be measured, when measuring fillet, the axis pin round end to be measured pushes the crimp head and the axis pin round end to be measured is made to stretch into the metering hole, and the conversion relation for measuring the straight-line displacement amount of the rack by displacement measuring device and passing through predetermined straight-line displacement amount and fillet obtains fillet numerical value.The shortcomings of quickly can accurately measuring pin shaft fillet by the measuring instrument, overcoming common calliper and inaccurate R rule measurements, more can accurately measure the fillet size of axis pin, be conducive to improve the assembling quality of machinery industry axis hole interference fit.
Description
Technical field
The utility model is related to contact type measurement technical field, more particularly, to pin shaft fillet measuring instrument.
Background technology
In machinery industry, axis hole interference fit generally may require that axis pin has using extensively in over-surplus fit structure design
Rational R angles (pin shaft fillet i.e. mentioned herein).In actual production, whether axis pin R angles are qualified directly in assembly process
The complexity of assembling and assembling quality are influenced, and how quickly to judge whether axis pin R angles reach the measurement of design requirement at present
Instrument is mainly vernier caliper and R rule.Vernier caliper can measure minimum and maximum diameter at axis pin R angles, and this method is due to people
Member's influence factor is too big and measurement accuracy is not high；It can be determined that whether axis pin R angles reach based on the R rule that R corner contours are worked it out to set
Meter requirement, but can not accurately measure the actual value at R angles.
The content of the invention
In view of the deficiencies of the prior art, the technical problem to be solved is that provide a kind of pin shaft fillet measurement for the utility model
Instrument quickly can accurately measure pin shaft fillet by the measuring instrument.
The utility model is to be addressed above-mentioned technical problem by the following technical programs.
The measuring method and principle that the pin shaft fillet measuring instrument of the utility model uses are as follows, using the amount with metering hole
Tool, the aperture of the metering hole is stretched into for axis pin round end to be measured and is interference fitted with the axis pin axle body to be measured, by measuring
It states axis pin round end to be measured and stretches into the displacement of the metering hole to obtain fillet numerical value, the displacement has predetermined with fillet
Conversion relation.
The measuring method combines the advantages of vernier caliper and R rule, while realizing quick measurement, can obtain accurate
Measured value.
Pin shaft fillet measuring instrument is filled including pedestal, gear train, rack spring system, hole gauge, connector and displacement measurement
It puts, the gear train and hole gauge positioning are installed on the pedestal, the rack spring system and the gear train
The straight-line displacement of rack is cooperatively formed by rack and pinion engagement transmission, the connector is equipped with the rack and keeps synchronous
Displacement, the connector is equipped with to be equipped with the confession axis pin round end to be measured and stretches with the matched crimp head of axis pin to be measured, the hole gauge
The metering hole for entering and being interference fitted with the axis pin axle body to be measured, the rack spring system are the connection by preloading spring
Device, which provides initial tension of spring, to be made the crimp head under non-measured state through the metering hole and is held in position, and measures fillet
When, the axis pin round end to be measured pushes the crimp head and the axis pin round end to be measured is made to stretch into the metering hole, passes through displacement
Measuring device measures the straight-line displacement amount of the rack and passes through the conversion relation acquisition circle of predetermined straight-line displacement amount and fillet
Angle numerical value.
Preferably, the hole gauge is equipped with stepped hole, the stepped hole includes insertion hole and the metering hole, the insertion
Hole is clearance fit with the axis pin axle body to be measured.
Preferably, the pedestal is equipped with and the matched guide groove of the connector.
Preferably, the connector is three sections of Step Shafts, left section of axis forms the crimp head, right section of axis and the rack
Connection, the diameter of axle of stage casing axis are more than the aperture of the metering hole, under non-measured state, the spring that is provided by the preloading spring
Pretightning force makes the left side shoulder of the stage casing axis, and positioned at the end face of the metering hole homonymy, positioning reclines with the hole gauge.
Preferably, the right section of axis is to be threadedly coupled with the rack.
Preferably, the hole gauge is equipped with for two split components.
Preferably, pointer compass of institute's displacement measurement device for measurement angular displacement, the gear train are equipped with described
Pointer compass, by obtaining straight-line displacement amount of the pointer compass reading through the predetermined conversion relation acquisition rack.
To sum up, the pin shaft fillet measuring instrument of the utility model is designed using contact type measurement, gear train can be passed through
By small rack linear displacement equations into the compass needle reading that can be obtained easily, overcome common calliper and advised with R
The shortcomings of inaccurate is measured, more can accurately measure the fillet size of axis pin, the utility model is conducive to improve mechanical row
The assembling quality of industry axis hole interference fit.
Description of the drawings
It is intended to, convenient for description preferred embodiment, not form the limit to scope of protection of the utility model in conjunction with the following drawings
System.
Fig. 1 is the principle schematic of the utility model pin shaft fillet measuring method；
Fig. 2 is the structure diagram of the utility model pin shaft fillet measuring instrument embodiment；
Fig. 3 is the partial enlargement structural representation at A in Fig. 2.
In figure：1- pedestals, 2- gear trains, 3- rack spring systems, 4- hole gauges, 5- connectors, 6- axis pins to be measured, 7- rollings
Son.
Specific embodiment
In order to facilitate the utility model is understood, below in conjunction with the accompanying drawings in the preferred embodiment pair of the utility model that provides
The utility model is described in detail.
Such as the embodiment principle schematic of Fig. 1 the utility model pin shaft fillet measuring methods, the measurer with metering hole is
The roller 7 that internal diameter determines, 6 axle body of axis pin to be measured are formed with roller 7 and are interference fitted, 6 left circles head contour of axis pin to be measured and roller 7
Right side endoporus sideline contacts, based on the difference of 6 round end fillet of axis pin (R angles i.e. referred to herein) to be measured, 6 left side of axis pin to be measured
The distance of round end end face to 7 left end face of roller occurs if the change in displacement between L1 and L2, displacement and fillet are with predetermined
Conversion relation (this operation relation can pass through advance computing set), thus measure pin shaft fillet (R angles) size and can turn
Become measuring the numerical value of displacement.
The pin shaft fillet measuring instrument of the utility model embodiment as shown in Figure 2, including pedestal 1, gear train 2, rack bullet
Spring system 3, hole gauge 4, connector 5 and displacement measuring device.
The gear train 2 and the positioning of the hole gauge 4 are installed on the pedestal 1, the gear train 2 and the pedestal
There are many 1 connection modes, and the same or similar all designing schemes of function are belonged in the scope of protection of the utility model.Institute
The straight-line displacement that rack spring system 3 cooperatively forms rack with the gear train 2 by rack and pinion engagement transmission is stated, it is described
There are a variety of different structure designs, the same or similar all design sides of function from the rack spring system 3 for gear train 2
Case is also belonged in the scope of protection of the utility model.
The measurement function that the hole gauge 4 is realized is identical with the measuring principle of the roller 7.The hole gauge 4 is equipped with described in confession
The metering hole that 6 round end of axis pin to be measured is stretched into and is interference fitted with 6 axle body of axis pin to be measured.
The connector 5 and the rack are equipped with and keep synchronous shift, may be selected to set on the pedestal 1 with it is described
5 matched guide groove of connector aids in the connector 5 to realize and accurately orients displacement, the connector 5 be equipped with it is to be measured
6 matched crimp head of axis pin.The rack spring system 3 provides initial tension of spring by preloading spring for the connector 5
Make the crimp head under non-measured state through the metering hole and be held in position.
When measuring fillet, 6 round end of axis pin to be measured pushes the crimp head and 6 round end of axis pin to be measured is made to stretch into institute
Metering hole is stated, the straight-line displacement amount of the rack is measured by displacement measuring device and passes through predetermined straight-line displacement amount and fillet
Conversion relation obtain fillet numerical value.
Institute's displacement measurement device can be the pointer compass for measuring angular displacement, and the gear train 2 is equipped with the pointer
Compass, by obtaining straight-line displacement amount of the pointer compass reading through the predetermined conversion relation acquisition rack.For example, by
Can be passed to the gear train 2 in the micro-displacement of the rack, the multi-stage gear in the gear train 2 can will described in
The small straight-line displacement of rack is enlarged into the rotational angle (turnning circle) of extreme gear, the pointer compass reading and the tooth
There is definite mathematical relationship in displacement.If use high precision position for the measurement by magnification of the small straight-line displacement of the rack
Displacement sensor replaces, also within the protection scope of the present utility model.
As shown in figure 3, the hole gauge 4 in the present embodiment is equipped with stepped hole, the stepped hole includes insertion hole and institute
Metering hole is stated, the insertion hole and 6 axle body of axis pin to be measured are clearance fit, and mistake proofing work is not only played to axis pin model to be measured
With, and ensure that the axis pin to be measured 6 is smoothly inserted into, improve measurement accuracy.The stepped hole is unappeasable in processing technology
In the case of, the hole gauge 4 can be arranged to two split components to reduce difficulty of processing, then ensured by assembly technology same
The requirement of axis degree, the technical solution is also in scope of protection of the utility model.
Such as one embodiment of the connector 5 in Fig. 2, the connector 5 is three sections of Step Shafts, and left section of axis forms institute
Crimp head is stated, right section of axis is connected with the rack, and the right section of axis can be used with the rack to be threadedly coupled, and can also use interference
The other manners such as cooperation are replaced and belonged in the scope of protection of the utility model.The diameter of axle of stage casing axis is more than the metering hole
Aperture, under non-measured state, the initial tension of spring provided by the preloading spring makes left side shoulder and the institute of the stage casing axis
The positioning positioned at the end face of the metering hole homonymy for stating hole gauge 4 reclines.
With reference to Fig. 2 more specifically, the diameter of axle of the stage casing axis is much larger than the hole of the metering hole on 4 right side of hole gauge
Footpath, the preloading spring in the rack spring system 3 keep the connector 5 spring force to the left of normality, are not having
Under conditions of axis pin 6 to be measured is inserted into, its right end face of the left side shoulder of the connector 5 and the hole gauge 4 is in the work of spring force
It is adjacent to lower positioning, is inserted into axis pin 6 to be measured described in the hole gauge 4 and inserts in the hole and the connector 5 is formed to the right
Thrust, when thrust is more than the spring force then displacement to the right of connector 5, until R corner contours and the hole gauge 4 of axis pin 6 to be measured
In the metering hole left side sideline contact, axis pin 6 to be measured cannot displacement to the right again, at this time the connector 5 also no longer to
Right displacement reads compass needle reading, R angles size is determined by shift value at this time.As one embodiment, it is seen that following attached
Displacement and the R angles table of comparisons shown in table one.
Subordinate list one
Several technical terms are intended merely to facilitate description used in the utility model, do not form to the utility model
Limitation, the utility model is not limited to above-described preferable embodiment, based on those skilled in the art institute
The known technology or use that can be known are capable of the various modifications of equivalence replacement and the embodiment of change in the prior art,
Every spirit or technical concept based on the utility model, should be included within the scope of protection of this utility model.
Claims (7)
1. pin shaft fillet measuring instrument, it is characterized in that：Including pedestal (1), gear train (2), rack spring system (3), hole gauge
(4), connector (5) and displacement measuring device, the gear train (2) and the hole gauge (4) positioning are installed in the pedestal (1)
On, the rack spring system (3) cooperatively forms the straight line of rack with the gear train (2) by rack and pinion engagement transmission
Displacement, the connector (5) are equipped with the rack and keep synchronous shift, and the connector (5) is equipped with and axis pin to be measured (6)
Matched crimp head, the hole gauge (4) be equipped with for axis pin (6) round end to be measured stretch into and with axis pin (6) axis to be measured
The metering hole of body interference fit, the rack spring system (3) provide spring pre-tightening by preloading spring for the connector (5)
Power makes the crimp head under non-measured state through the metering hole and being held in position, measured by displacement measuring device described in
The straight-line displacement amount of rack and the conversion relation acquisition fillet numerical value for passing through predetermined straight-line displacement amount and fillet.
2. pin shaft fillet measuring instrument according to claim 1, it is characterized in that：The hole gauge (4) is equipped with stepped hole, the rank
Terraced hole includes insertion hole and the metering hole, and the insertion hole is clearance fit with axis pin (6) axle body to be measured.
3. pin shaft fillet measuring instrument according to claim 1, it is characterized in that：The pedestal (1) is equipped with and the connector
(5) matched guide groove.
4. pin shaft fillet measuring instrument according to claim 1, it is characterized in that：The connector (5) is three sections of Step Shafts, left
Section axis forms the crimp head, and right section of axis is connected with the rack, and the diameter of axle of stage casing axis is more than the aperture of the metering hole, non-survey
Under amount state, the initial tension of spring provided by the preloading spring makes the left side shoulder of the stage casing axis and the hole gauge (4)
Positioned at the end face of the metering hole homonymy positioning recline.
5. pin shaft fillet measuring instrument according to claim 4, it is characterized in that：The right section of axis connects with the rack for screw thread
It connects.
6. pin shaft fillet measuring instrument according to claim 1, it is characterized in that：The hole gauge (4) is matched somebody with somebody for two split components
It fills.
7. pin shaft fillet measuring instrument according to claim 1, it is characterized in that：Institute's displacement measurement device is measurement angular displacement
Pointer compass, the gear train (2) is equipped with the pointer compass, by obtaining the pointer compass reading through predetermined
Conversion relation obtains the straight-line displacement amount of the rack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721276627.5U CN207407791U (en) | 2017-09-30 | 2017-09-30 | Pin shaft fillet measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721276627.5U CN207407791U (en) | 2017-09-30 | 2017-09-30 | Pin shaft fillet measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207407791U true CN207407791U (en) | 2018-05-25 |
Family
ID=62406556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721276627.5U Active CN207407791U (en) | 2017-09-30 | 2017-09-30 | Pin shaft fillet measuring instrument |
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| Country | Link |
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| CN (1) | CN207407791U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107621215A (en) * | 2017-09-30 | 2018-01-23 | 杭州东华链条集团有限公司 | Pin shaft fillet measuring method and the measuring instrument using this method |
-
2017
- 2017-09-30 CN CN201721276627.5U patent/CN207407791U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107621215A (en) * | 2017-09-30 | 2018-01-23 | 杭州东华链条集团有限公司 | Pin shaft fillet measuring method and the measuring instrument using this method |
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