CN210833349U - Measuring device for small diameter of spiral internal spline - Google Patents
Measuring device for small diameter of spiral internal spline Download PDFInfo
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- CN210833349U CN210833349U CN201922204583.0U CN201922204583U CN210833349U CN 210833349 U CN210833349 U CN 210833349U CN 201922204583 U CN201922204583 U CN 201922204583U CN 210833349 U CN210833349 U CN 210833349U
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- internal spline
- measuring head
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- positioning part
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- 238000005259 measurement Methods 0.000 claims abstract description 21
- 230000000694 effects Effects 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 5
- 210000002421 cell wall Anatomy 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001915 proofreading effect Effects 0.000 description 1
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Abstract
The utility model relates to a measuring device for the minor diameter of a helical internal spline, which comprises an internal diameter indicating gauge, wherein one end of a connecting rod of the internal diameter indicating gauge is provided with a dial indicator, the other end is provided with a movable measuring head, the movable measuring head is axially vertical to the connecting rod, the tail end of the movable measuring head is provided with a positioning measuring head, the central axis of the positioning measuring head and the central axis of the movable measuring head are the same axis, the extending end of the positioning measuring head is a measuring positioning part, the middle of the measuring positioning part is provided with an addendum positioning part which supports against the addendum of the helical internal spline to be measured, the two sides of the addendum positioning part are respectively and symmetrically provided with a key groove positioning part which is inserted into the key groove of the helical internal spline to be measured, by adopting the measuring device, a technician only needs to judge whether the sum of the reading of the dial indicator and the minor diameter value of, the method is simple to operate and high in measurement accuracy.
Description
Technical Field
The utility model relates to a measurement technical field of internal spline path, in particular to measuring device of spiral internal spline path.
Background
In some special machines it is generally necessary to use a part provided with helical internal splines, the minor diameter of which must be controlled within a range between a specified maximum and minimum dimension. However, since the helical internal spline is not a straight-tooth type and has a helical angle, when a standard inside diameter dial gauge is used for testing, a gauge head is easy to enter the key groove of the internal spline from the top of the tooth smoothly, and only the small diameter of the end face part of the internal spline can be measured, and the small diameters of other positions in the length direction of the helical internal spline cannot be measured, so that the size of the helical internal spline is easy to have large errors, and the part cannot be used.
Disclosure of Invention
The utility model aims at prior art not enough, provide a measuring device of spiral internal spline path, it can the accurate actual size that measures the spiral internal spline path of measured part to can judge out the path size of spiral internal spline fast whether qualified, moreover, the assembly is simple, easy and simple to handle.
The technical scheme of the utility model is that: the utility model provides a measuring device of spiral internal spline path, includes the internal diameter dial gauge, the connecting rod one end of internal diameter dial gauge sets up the percentage table, and the other end sets up a movable measuring head, movable measuring head and connecting rod axial vertical, a location measuring head is installed to the tail end of movable measuring head, the axis of location measuring head is same axis with the axis of movable measuring head, the extension end of location measuring head is for measuring location portion, the centre of measuring location portion is equipped with a top location portion, and this top location portion supports the top of being surveyed the spiral internal spline, the both sides of top location portion symmetry respectively are equipped with keyway location portion, and this keyway location portion is used for inserting in the keyway of being surveyed the spiral internal spline.
The arc radius R1 of the key groove positioning part is 0.1-0.2 mm smaller than one half of the minimum value of the major diameter D1 of the measured spiral inner spline.
The width L1 of keyway location portion is less than the one-half of the minimum value of keyway width L0 of the spiral internal spline of being surveyed by 0.1 ~ 0.2mm, and the radian of two keyway location portion looks side is coincide with the tooth root radian of the spiral internal spline of being surveyed.
And the arc radius R2 of the tooth crest positioning part is 3-5 mm smaller than one half of the minimum value of the measured spiral internal spline small diameter D2.
The tail end of activity measuring head is equipped with the screw hole, the installation department of the upper end for being equipped with the external screw thread of location measuring head, location measuring head pass through installation department and activity measuring head threaded connection.
The total length of the measuring and positioning part is larger than the diameter of the positioning measuring head, and the width of the measuring and positioning part is smaller than the diameter of the positioning measuring head.
The distance from the vertex of the tooth top positioning part to the circle center of the measured spiral internal spline is smaller than the distance from the vertex of the key groove positioning part to the circle center of the measured spiral internal spline, and the distance from the vertex of the tooth top positioning part to the circle center of the measured spiral internal spline is half of the small diameter D2 of the measured spiral internal spline.
Adopt above-mentioned technical scheme: the tail end of the movable measuring head is provided with a positioning measuring head, the positioning measuring head is used for replacing a standard replaceable measuring head of the inner diameter indicating gauge, and the positioning measuring head and the movable measuring head are on the same central axis, so that the measuring accuracy is ensured. Measure the centre of location portion and be equipped with an addendum location portion, the both sides of addendum location portion symmetry respectively are equipped with keyway location portion, during the use, insert the spiral internal spline of being surveyed the part with the one end that the internal diameter dial gauge was equipped with the measuring head, make the addendum location portion of location measuring head and the top of activity measuring head support two relative addendum respectively, two keyway location portions insert the keyway location respectively, then remove the internal diameter dial gauge to the position that needs to measure along the spiral direction of spiral internal spline, measure, carry out the in-process of measuring at the removal internal diameter dial gauge, the location measuring head passes through addendum location portion and two keyway location portions and remains three point location throughout in the spiral internal spline, the skew can not appear, prevent in addendum location portion from addendum slippage to keyway, guarantee measuring accuracy. Moreover, two keyway location portions insert respectively in the keyway, can play the guide effect to removing the internal diameter dial gauge, guarantee that the internal diameter dial gauge can remove along the spiral direction of spiral internal spline. The measuring device has the advantages of simple structure, high measuring accuracy, convenience for operation of technicians and capability of greatly improving the working efficiency.
The arc radius of the key groove positioning part is 0.1-0.2 mm smaller than one half of the minimum value of the major diameter of the measured spiral internal spline, and the interference between the arc bottom end of the key groove positioning part and the key groove bottom of the spiral internal spline during measurement is prevented.
The width ratio of keyway location portion is surveyed the half of the minimum value of spiral internal spline's keyway width and is little 0.1 ~ 0.2mm, and the radian of two keyway location portions looks side coincide with the tooth root radian of being surveyed spiral internal spline, and the lateral wall of keyway location portion and the keyway cell wall of spiral internal spline take place to interfere when preventing to have certain clamp force through the arc side of two keyway location portions looks side to the tooth root of spiral internal spline, further guarantee measuring accuracy.
The arc radius of the tooth crest positioning part is 3-5 mm smaller than one half of the minimum value of the minor diameter of the measured spiral internal spline, so that the arc bottom end of the tooth crest positioning part can contact the tooth crest of the spiral internal spline, and the interference between the arc of the tooth crest positioning part and the tooth crest of the spiral internal spline during measurement is prevented.
The tail end of activity measuring head is equipped with the screw hole, the installation department of the upper end of location measuring head for being equipped with the external screw thread, location measuring head pass through installation department and activity measuring head threaded connection, adopt threaded connection, can change not unidimensional location measuring head as required, and the suitability is better.
The distance from the vertex of the tooth top positioning part to the circle center of the measured spiral internal spline is smaller than the distance from the vertex of the key groove positioning part to the circle center of the measured spiral internal spline, the distance from the vertex of the tooth top positioning part to the circle center of the measured spiral internal spline is one half of the small diameter D2 of the measured spiral internal spline, and the positioning measuring head can be further ensured to be accurately positioned on the tooth top and in the key groove.
The invention is further described with reference to the drawings and the specific embodiments.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of a positioning measuring head according to the present invention;
fig. 3 is a cross-sectional view of a positioning measuring head according to the present invention;
FIG. 4 is a schematic structural view of a helical internal spline to be measured.
In the attached drawing, 1 is a positioning measuring head, 1-1 is a key groove positioning part, 1-2 is a tooth top positioning part, 2 is a measured spiral internal spline, 2-1 is a key groove, 2-2 is a tooth top, 3 is an internal diameter indicator, 3-1 is a dial indicator, 3-2 is a connecting rod, and 3-3 is a movable measuring head.
Detailed Description
Referring to fig. 1 to 4, the measuring device for the minor diameter of the helical internal spline comprises an internal diameter indicator 3, wherein one end of a connecting rod 3-2 of the internal diameter indicator 3 is provided with a dial indicator 3-1, the other end of the connecting rod is provided with a movable measuring head 3-3, and the movable measuring head 3-3 is axially vertical to the connecting rod 3-2. The tail end of the movable measuring head 3-3 is provided with a positioning measuring head 1, the positioning measuring head 1 is used for replacing a replaceable measuring head with an inner diameter indicator 3 standard, the tail end of the movable measuring head 3-3 is provided with a threaded hole, the upper end of the positioning measuring head 1 is an installation part 1-3 provided with external threads, the positioning measuring head 1 is in threaded connection with the movable measuring head 3-3 through the installation part 1-3, threaded connection is adopted, the positioning measuring heads 1 with different sizes can be replaced as required, and the applicability is better. The central axis of the positioning measuring head 1 and the central axis of the movable measuring head 3-3 are the same axis, so that the positioning measuring head 1 is axially perpendicular to the connecting rod 3-2 in the same direction, and the measuring accuracy is guaranteed. The extending end of the positioning measuring head 1 is a measuring positioning part, the middle of the measuring positioning part is provided with an addendum positioning part 1-2, the addendum positioning part 1-2 props against an addendum 2-2 of the measured spiral internal spline 2, two sides of the addendum positioning part 1-2 are respectively and symmetrically provided with a key groove positioning part 1-1, and the key groove positioning part 1-1 is used for being inserted into a key groove 2-1 of the measured spiral internal spline 2. The key groove positioning part 1-1 is inserted into the key groove 2-1 to play a positioning role, and also plays a guiding role when the inner diameter indicating gauge moves. The arc radius R1 of the key groove positioning part 1-1 is 0.1-0.2 mm smaller than one half of the minimum value of the major diameter D1 of the measured spiral internal spline 2, and the interference between the arc bottom end of the key groove positioning part 1-1 and the key groove bottom of the spiral internal spline during measurement is prevented. The width L1 of keyway location portion 1-1 is less than the one-half of the minimum value of keyway width L0 of the spiral internal spline 2 of being surveyed by 0.1 ~ 0.2mm, and the radian of two keyway location portions 1-1 looks side is identical with the tooth root radian of the spiral internal spline 2 of being surveyed, further guarantees the measuring accuracy and prevents that the lateral wall of keyway location portion 1-1 from interfering with the keyway cell wall of spiral internal spline when measuring, and has certain clamp force to the tooth root of spiral internal spline through the arc side of two keyway location portions 1-1 looks side, guarantees the reliability of location. The distance from the peak of the tooth top positioning part 1-2 to the circle center O of the tested spiral internal spline 2 is smaller than the distance from the peak of the key groove positioning part 1-1 to the circle center O of the tested spiral internal spline 2, and the distance from the peak of the tooth top positioning part 1-2 to the circle center O of the tested spiral internal spline 2 is half of the minor diameter D2 of the tested spiral internal spline 2, so that the measurement positioning part and the spiral internal spline are complementary in structure, and the measurement positioning part can be accurately positioned on the tooth top 2-2 and in the key groove 2-1 of the tested spiral internal spline 2. The arc radius R2 of the tooth crest positioning part 1-2 is smaller than one half of the minimum value of the small diameter D1 of the measured spiral internal spline 2 by 3-5 mm, so that the arc bottom end of the tooth crest positioning part 1-2 can contact the tooth crest of the spiral internal spline, the measurement accuracy is guaranteed, and meanwhile, the interference between the arc of the tooth crest positioning part 1-2 and the tooth crest of the spiral internal spline during measurement is prevented. The total length of the measurement positioning part is larger than the diameter of the positioning measuring head 1, the width of the measurement positioning part is smaller than the diameter of the positioning measuring head 1, the measurement positioning part can be effectively positioned, and a space is reserved for the measurement positioning part to move in the spiral internal spline. In the process of measuring by moving the inside diameter indicator 3, the positioning measuring head 1 always keeps three-point positioning in the helical internal spline of the part through the tooth crest positioning part 1-2 and the two key groove positioning parts 1-1, so that deviation can not occur, the tooth crest positioning part 1-2 is prevented from slipping to the key groove from the tooth crest, the measurement of the small diameter of the helical internal spline is realized, and the measuring accuracy is ensured.
The measuring device using the invention comprises the following steps:
1) and removing the standard replaceable measuring head on the inner diameter indication table 3.
2) The measuring positioning part of the positioning measuring head 1 is in threaded connection with a movable measuring head 3-3 of an inner diameter indicating table 3;
2) inserting one end of the inner diameter indicating gauge 3, which is provided with the measuring head, into the spiral internal spline of the proof circle, so that the top ends of the tooth crest positioning parts 1-2 and the movable measuring head 3-3 are respectively abutted against two opposite tooth crests, the two key groove positioning parts 1-1 are respectively inserted into the key grooves for positioning, and the size of the spiral internal spline of the proof circle is the same as the minimum size of the spiral internal spline of the part to be measured.
3) And adjusting the dial indicator 3-1 of the inner diameter indicator 3 to be zero by taking the size of the calibration sample ring as a measurement reference of the size of the measured part.
4) And taking out the calibrated inner diameter indicator 3 from the calibration sample ring, inserting the calibrated inner diameter indicator into a spiral internal spline of the part to be measured, enabling the top ends of the tooth crest positioning parts 1-2 and the movable measuring heads 3-3 of the positioning measuring heads 1 to respectively abut against two opposite tooth crests, and respectively inserting the two key groove positioning parts 1-1 into the key grooves for positioning.
5) The inner diameter indicator 3 is moved to a position needing to be measured along the spiral direction of the spiral internal spline under the guidance of the two key groove positioning parts 1-1, and the reading of the dial indicator 3-1 at the moment is recorded.
6) Adding the reading of the dial indicator 3-1 in the step 5) with the small diameter value of the spiral inner spline of the proof ring to obtain the small diameter value of the spiral inner spline of the part to be measured;
6-1), if the sum of the reading of the dial indicator 3-1 and the small diameter value of the helical internal spline of the proof circle is within the size range, the size of the measured part is qualified;
6-2), if the sum of the reading of the dial indicator 3-1 and the small diameter value of the helical internal spline of the proof sample ring is not in the size range, the size of the measured part is not qualified.
The utility model discloses in the measurement process, three point location is kept throughout in the spiral internal spline in tooth top location portion 1-2 and two keyway location portions 1-1 of positioning measurement head 1, therefore when 3 helical move of internal diameter instruction table, tooth top location portion 1-2 can not slide to the keyway, guarantee measuring result's accuracy, and internal diameter instruction table 3 helical move under keyway location portion 1-1's guide effect, the technical staff of being convenient for measures the different positions of spiral internal spline, greatly improved work efficiency. The positioning measuring head has a simple structure, and a factory can manufacture the positioning measuring heads with different sizes according to actual needs, so that the measuring device is suitable for the spiral internal splines with different sizes. Furthermore, the utility model discloses a measuring method is easy and simple to handle, and whether the technician only needs the reading of judging the percentage table and the sum of the path value of the spiral internal spline of proofreading circle in size range, just can learn whether qualified by the size of the spiral internal spline of part. The measuring device is convenient to carry, the operation steps are very simple, the measurement can be completed by a technician on a working site, the measurement accuracy can be improved, and the working efficiency can be improved.
Claims (7)
1. The utility model provides a measuring device of spiral internal spline path, includes internal diameter dial indicator (3), connecting rod (3-2) one end of internal diameter dial indicator (3) sets up percentage table (3-1), and the other end sets up a movable measuring head (3-3), movable measuring head (3-3) and connecting rod (3-2) axial vertical, its characterized in that: the utility model discloses a measuring device, including activity measuring head (3-3), the axis of activity measuring head (3-3) is same axis, the extension end of location measuring head (1) is for measuring location portion, the centre of measuring location portion is equipped with a top location portion (1-2), and this top location portion (1-2) supports top (2-2) of being surveyed spiral internal spline (2), the both sides of top location portion (1-2) are symmetrical key slot location portion (1-1) respectively, and this key slot location portion (1-1) is used for inserting in key slot (2-1) of being surveyed spiral internal spline (2).
2. The device for measuring the minor diameter of the helical internal spline of claim 1, wherein: the arc radius R1 of the key groove positioning part (1-1) is 0.1-0.2 mm smaller than one half of the minimum value of the major diameter D1 of the tested spiral internal spline (2).
3. The device for measuring the minor diameter of the helical internal spline of claim 1, wherein: the width L1 of the key groove positioning part (1-1) is 0.1-0.2 mm smaller than one half of the minimum value of the key groove width L0 of the tested spiral inner spline (2), and the radian of the opposite sides of the two key groove positioning parts (1-1) is matched with the radian of the tooth root of the tested spiral inner spline (2).
4. The device for measuring the minor diameter of the helical internal spline of claim 1, wherein: and the arc radius R2 of the tooth crest positioning part (1-2) is 3-5 mm smaller than one half of the minimum value of the small diameter D2 of the tested spiral internal spline (2).
5. The device for measuring the minor diameter of the helical internal spline of claim 1, wherein: the tail end of the movable measuring head (3-3) is provided with a threaded hole, the upper end of the positioning measuring head (1) is an installation part (1-3) provided with external threads, and the positioning measuring head (1) is in threaded connection with the movable measuring head (3-3) through the installation part (1-3).
6. The device for measuring the minor diameter of the helical internal spline of claim 1, wherein: the total length of the measurement positioning part is larger than the diameter of the positioning measuring head (1), and the width of the measurement positioning part is smaller than the diameter of the positioning measuring head (1).
7. The device for measuring the minor diameter of the helical internal spline of claim 1, wherein: the distance from the vertex of the tooth top positioning part (1-2) to the center of the measured spiral inner spline (2) is smaller than the distance from the vertex of the key groove positioning part (1-1) to the center of the measured spiral inner spline (2), and the distance from the vertex of the tooth top positioning part (1-2) to the center of the measured spiral inner spline (2) is one half of the small diameter D2 of the measured spiral inner spline (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922204583.0U CN210833349U (en) | 2019-12-11 | 2019-12-11 | Measuring device for small diameter of spiral internal spline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922204583.0U CN210833349U (en) | 2019-12-11 | 2019-12-11 | Measuring device for small diameter of spiral internal spline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210833349U true CN210833349U (en) | 2020-06-23 |
Family
ID=71262700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922204583.0U Expired - Fee Related CN210833349U (en) | 2019-12-11 | 2019-12-11 | Measuring device for small diameter of spiral internal spline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210833349U (en) |
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2019
- 2019-12-11 CN CN201922204583.0U patent/CN210833349U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200623 |