CN111397491B - An eccentric shaft inspection tool - Google Patents
An eccentric shaft inspection tool Download PDFInfo
- Publication number
- CN111397491B CN111397491B CN202010370650.0A CN202010370650A CN111397491B CN 111397491 B CN111397491 B CN 111397491B CN 202010370650 A CN202010370650 A CN 202010370650A CN 111397491 B CN111397491 B CN 111397491B
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- shaft
- eccentric shaft
- eccentric
- shaft hole
- cam
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- 238000007689 inspection Methods 0.000 title 1
- 238000001514 detection method Methods 0.000 claims abstract description 29
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B5/252—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention provides an eccentric shaft checking fixture which is used for detecting an eccentric shaft, wherein the eccentric shaft comprises a first eccentric shaft, a first cam, a second eccentric shaft and a second cam. The gauge comprises a base, a first cam shaft sleeve, a first eccentric shaft sleeve, an integrated shaft sleeve, a measuring strip and a height gauge. The first cam shaft sleeve is provided with a first shaft hole matched with the first cam, the first eccentric shaft sleeve is provided with a second shaft hole matched with the first eccentric shaft, a preset first eccentric amount is arranged between the second shaft hole and the first shaft hole, the integrated shaft sleeve is internally provided with a through third shaft hole and a through fourth shaft hole, the third shaft hole is matched with the second cam, the fourth shaft hole is matched with the second eccentric shaft, a preset second eccentric amount is arranged between the third shaft hole and the fourth shaft hole, the first end of the measuring strip is connected to the integrated shaft sleeve, and the second end of the measuring strip is a free end. The invention has the advantages of simple structure, high detection speed and high detection precision, provides detection efficiency and reduces detection cost.
Description
Technical Field
The invention relates to the field of shaft part production, in particular to an eccentric shaft gauge.
Background
Eccentric shafts are very widely used in mechanical devices, and in mechanical transmission, the rotary motion is changed into the reciprocating linear motion or the reciprocating linear motion is changed into the rotary motion, and the rotary motion is generally completed by using the eccentric shaft. As shown in fig. 1 to 2, there is shown a typical eccentric shaft 100, and the eccentric shaft 100 includes a first eccentric shaft 101, a first cam 102, a second eccentric shaft 103, and a second cam 104. Wherein, the end part of one eccentric shaft 101 is provided with a central hole, and the outer circle of the second eccentric shaft 103 is provided with a spline.
The accuracy of the eccentric amount and angle of the eccentric shafts directly affects the performance of the whole device, such as the eccentric shaft 100 in fig. 1 to 2, and when leaving the factory, it is necessary to ensure that the eccentric amount of the first eccentric shaft 101 with respect to the first cam 102, the eccentric amount of the second eccentric shaft 103 with respect to the second cam 104 is lower than a predetermined value, and the phase angle of the eccentric shaft 100 is lower than a predetermined value. The phase angle may be characterized as the angle between the center line of the first eccentric shaft 101 and the first cam 102 and the center line of the second eccentric shaft 103 and the second cam 104.
At present, for the detection of the eccentric amount and the phase angle of the eccentric shaft, a conventional detection method generally adopts a phase meter for detection, but for mass production of corresponding production lines, the phase meter has the defects of low detection efficiency and high cost.
Disclosure of Invention
In order to solve the technical problems, the invention provides the eccentric shaft checking fixture which is simple in structure, high in detection speed and high in detection precision. The specific technical scheme of the invention is as follows:
the eccentric shaft checking fixture is used for detecting the eccentric shaft, and the eccentric shaft comprises a first eccentric shaft, a first cam, a second eccentric shaft and a second cam. The eccentric shaft gauge comprises:
A base;
The first cam shaft sleeve is connected to the base, and a first shaft hole matched with the first cam is formed in the first cam shaft sleeve;
The first eccentric shaft sleeve is connected to the base, a second shaft hole matched with the first eccentric shaft is formed in the first eccentric shaft sleeve, and a preset first eccentric amount is arranged between the second shaft hole and the first shaft hole;
The integrated shaft sleeve is internally provided with a third shaft hole and a fourth shaft hole which are connected and communicated, wherein the third shaft hole is matched with the second cam, the fourth shaft hole is matched with the second eccentric shaft, and a preset second eccentric amount is arranged between the third shaft hole and the fourth shaft hole;
The first end of the measuring strip is connected to the integral shaft sleeve, and the second end of the measuring strip is a free end;
the altimeter is connected to the base.
In some embodiments, the eccentric shaft gauge further comprises a zero correction block connected to the base.
In some embodiments, the integral bushing includes a first connection plate and a second connection plate detachably connected together, the third shaft hole is formed on the first connection plate, and the fourth shaft hole is formed on the second connection plate.
In some embodiments, the first eccentric shaft sleeve is slidably coupled to the base, the first eccentric shaft sleeve being movable between a distal position away from the first cam sleeve and a proximal position proximal to the first cam sleeve.
In some embodiments, balls are disposed on inner walls of the first shaft hole and the second shaft hole.
In some embodiments, the first end of the measuring strip is screwed to the integral sleeve via a bolt, and the second end of the measuring strip is formed with a flat measuring portion.
In some embodiments, the altimeter is a dial gauge.
In some embodiments, the dial indicator comprises a gauge stand, a gauge head and a gauge needle, wherein the gauge stand is connected to the base, the gauge head is connected to the gauge stand, and the gauge needle is connected to the gauge head and can move up and down along the vertical direction.
Compared with the eccentric shaft gauge in the prior art, the invention has the advantages of simple structure, high detection speed and high detection precision, provides detection efficiency and reduces detection cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed to be practical in the embodiments will be briefly described below, and it will be obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein,
FIG. 1 is a schematic view of an eccentric shaft in a view angle;
FIG. 2 is a schematic view of the structure of an eccentric shaft at another view angle;
FIG. 3 is a schematic diagram of a front view of the present invention;
FIG. 4 is a schematic top view of the present invention;
FIG. 5 is a schematic view of a base structure according to the present invention;
FIG. 6 is a schematic view of a first cam sleeve according to the present invention;
FIG. 7 is a schematic view of the structure of the first eccentric shaft sleeve in the present invention;
FIG. 8 is a schematic diagram of the front view of the combined shaft sleeve and measuring strip of the present invention;
FIG. 9 is a schematic left-hand view of the combination bushing and measuring strip of the present invention;
Fig. 10 is a schematic top view of the combined bushing and measuring strip of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and the detailed description below, in order to make the above objects, features and advantages of the present invention more comprehensible.
The phase meter is adopted to detect the crankshaft, and the defects of low detection efficiency and high detection cost exist. In view of the above, the invention provides an eccentric shaft gauge with simple structure and low cost.
The invention is particularly suitable for the detection of an eccentric shaft 100 in fig. 1, 2, which eccentric shaft 100 comprises a first eccentric shaft 101, a first cam 102, a second eccentric shaft 103 and a second cam 104.
As shown in fig. 3 to 10, the eccentric shaft gauge of the present invention at least includes a base 1, a first cam sleeve 2, a first eccentric shaft sleeve 3, an integral sleeve 4, a measuring bar 5 and a height gauge 6. Optionally, the eccentric shaft gauge of the invention further comprises a zero correction block 7. Specific:
The first cam sleeve 2 is connected to the base 1, and a first shaft hole 21 matching the first cam 102 is formed in the first cam sleeve 2. Alternatively, the first cam sleeve 2 is fixedly connected to the base 1 via a bolt.
The first eccentric shaft sleeve 3 is connected to the base 1, and a second shaft hole 31 matched with the first eccentric shaft 101 is formed in the first eccentric shaft sleeve 3, and a predetermined first eccentric amount is provided between the second shaft hole 31 and the first shaft hole 21.
The integral shaft sleeve 4 is internally provided with a third shaft hole 41 and a fourth shaft hole 42 which are connected and communicated, wherein the third shaft hole 41 is matched with the second cam 104, the fourth shaft hole 42 is matched with the second eccentric shaft 103, and a preset second eccentric amount is arranged between the third shaft hole 41 and the fourth shaft hole 42.
One end of the measuring strip 5 is connected to the integral shaft sleeve 4, and the other end is a free end.
Attached to the base 1 is a height gauge 6 for measuring the height of the free end of the measuring strip 5.
In the present invention, the dimensions of the first shaft hole 21, the second shaft hole 31, the third shaft hole 41 and the fourth shaft hole 42, the first eccentric amount between the second shaft hole 31 and the first shaft hole 21, and the second eccentric amount between the third shaft hole 41 and the fourth shaft hole 42 are all prefabricated with the standard pass of the eccentric shaft to be detected as the reference.
In other words, if the first cam 102 and the first eccentric shaft 101 of the detected eccentric shaft can smoothly enter the first shaft hole 21 and the second shaft hole 31, it is indicated that the sizes of the first cam 102 and the first eccentric shaft 101 and the eccentric amount therebetween are acceptable, and otherwise, are regarded as unacceptable. Similarly, if the second cam 104, the second eccentric shaft 103 of the detected eccentric shaft and the detected eccentric shaft can smoothly enter the third shaft hole 41 and the fourth shaft hole 42, the size of the second cam 104, the second eccentric shaft 103 and the eccentric amount therebetween are qualified, and otherwise, are regarded as disqualified.
The altimeter 6 is zero calibrated prior to the detection of the eccentric axis being detected. Optionally, for facilitating zero calibration, the invention further comprises an optional zero calibration block 7 connected to the base. When the pointer of the altimeter 6 just strikes the upper end face of the zero correction block 7, the reading of the altimeter 6 is zero.
Hereinafter, we will continue to refer to fig. 3 and 4 for exemplary description of the specific working procedure of the eccentric shaft gauge of the present invention:
step one, the first eccentric shaft 101 and the first cam 102 of the eccentric shaft 100 to be detected are sleeved inwards towards the first shaft hole 21 on the first cam shaft sleeve 2, if the first eccentric shaft 101 and the first cam 102 can be sleeved into the second shaft hole 31 and the first shaft hole 21 respectively, the sizes of the first cam 102 and the first eccentric shaft 101 and the eccentric amount between the two are qualified, and the step two is entered. Otherwise, the current eccentric shaft 100 is stopped from being detected as being unqualified.
After the detection by the first step, the eccentric shaft 100 currently being detected is fixed to the first cam sleeve 2 and the first eccentric shaft sleeve 3.
Step two, the third shaft hole 41 on the integral shaft sleeve 4 is sleeved on the second eccentric shaft 103 facing the eccentric shaft 100, if the second eccentric shaft 103 and the second cam 104 can be sleeved in the fourth shaft hole 42 and the third shaft hole 41 respectively, the sizes of the second eccentric shaft 103 and the second cam 104 and the eccentric amount between the two are qualified, and the step three is entered. Otherwise, the current eccentric shaft 100 is stopped from being detected as being unqualified.
After the detection in the second step, the size and the eccentric amount of the eccentric shaft 100 currently detected are considered to be acceptable. At this time, the free end of the measuring bar 5 protrudes beyond the position of the altimeter 6.
And step three, the pointer of the altimeter 6 moves to the free end of the measuring strip 5 to measure the height of the free end of the measuring strip 5. Based on the height value of the free end of the measuring bar 5, the value of the phase angle of the eccentric shaft 100 to be detected can be obtained.
Optionally, the height of the zero correction block 7 is adaptively adjusted, so that when the detected eccentric shaft is a standard component, the free end of the measuring strip 5 and the top end surface of the zero correction block 7 are positioned on the same horizontal plane, namely, the reading of the altimeter 6 is zero. Thus, the greater the absolute value of the reading of the altimeter 6 (i.e. the greater the degree to which the free end of the measuring bar 5 deviates from the top face of the zero correction block 7), the greater the phase angle of the eccentric shaft 100 currently being detected, and conversely, the smaller the phase angle.
It is easily conceivable that there is a defined numerical relationship between the reading of the altimeter 6 and the phase angle of the eccentric shaft 100 to be detected, which numerical relationship can be characterized by a defined quantitative relationship (or functional relationship), i.e. the phase angle of the eccentric shaft 100 to be currently detected can be obtained on the basis of the reading of the current altimeter 6.
To obtain the phase angle value quickly, in some embodiments, the numerical correspondence between the readings of the altimeter and the phase angle of the eccentric shaft is filled in a mapping table in advance. After the reading of the altimeter is obtained, the corresponding phase angle value is quickly obtained by searching the mapping table.
Therefore, the angle detection is converted into the height detection through the measuring strip 5, so that the detection difficulty is simplified. In addition, a slight change in the phase angle causes a significant change in the height value of the free end of the measuring bar 5, that is, the measuring bar 5 amplifies the detection amount, and thus the detection accuracy of the phase angle can be greatly improved.
Of course, in theory, the longer the length of the measuring bar 5, the higher the measurement accuracy of the phase angle. However, in order to prevent bending deformation caused by excessively long length of the measuring bar 5, in a specific embodiment, the length of the measuring bar 5 needs to be adaptively selected.
Alternatively, as shown in fig. 9, the integral bushing 4 includes a first connection plate and a second connection plate detachably connected together, a third shaft hole 41 is formed in the first connection plate, and a fourth shaft hole 42 is formed in the second connection plate. The first connecting plate and the second connecting plate are detachably connected together through bolts.
Alternatively, the first eccentric shaft sleeve 3 is slidably connected to the base 1, the first eccentric shaft sleeve 3 being movable between a distant position distant from the first cam sleeve 2 and a close position close to the first cam sleeve 2. By slidably connecting the first eccentric shaft sleeve 3 to the base 1, in step one of the detection process:
After the first eccentric shaft sleeve 3 is moved to a far position, the first cam 102 is sleeved in the first shaft hole 21, and if the first cam 102 cannot be sleeved in, the detection is finished directly, and the detection is determined to be unqualified. Otherwise, the first eccentric shaft sleeve 3 is moved toward the approaching position, and it is observed whether the first eccentric shaft 101 can smoothly enter into the second shaft hole 31.
Alternatively, as shown in fig. 4, in order to reduce friction between the eccentric shaft 100 to be inspected and the first shaft hole 21 and the second shaft hole 31, balls are provided on the inner walls of the first shaft hole 21 and the second shaft hole 31.
Alternatively, as shown in fig. 3, the altimeter 6 adopts a dial gauge, which includes a gauge stand 61, a gauge head 62 and a gauge needle 63, where the gauge stand 61 is connected to the base 1, the gauge head 62 is connected to the gauge stand 61, and the gauge needle 63 is connected to the gauge head 62 and can move up and down along a vertical direction to achieve touching of the free end of the measuring strip 5. Alternatively, as shown in fig. 10, a first end of the measuring bar 5 is screwed to the integral sleeve via a bolt, and a second end of the measuring bar 5 is formed with a flat measuring portion.
The invention has been described above in sufficient detail with a certain degree of particularity. It will be appreciated by those of ordinary skill in the art that the descriptions of the embodiments are merely exemplary and that all changes that come within the true spirit and scope of the invention are desired to be protected. The scope of the invention is indicated by the appended claims rather than by the foregoing description of the embodiments.
Claims (6)
1. The utility model provides an eccentric shaft examines utensil for realize the detection to the eccentric shaft, the eccentric shaft includes first eccentric shaft, first cam, second eccentric shaft and second cam, its characterized in that includes:
A base;
The first cam shaft sleeve is connected to the base, and a first shaft hole matched with the first cam is formed in the first cam shaft sleeve;
The first eccentric shaft sleeve is connected to the base, a second shaft hole matched with the first eccentric shaft is formed in the first eccentric shaft sleeve, and a preset first eccentric amount is arranged between the second shaft hole and the first shaft hole;
The integrated shaft sleeve is internally provided with a third shaft hole and a fourth shaft hole which are connected and communicated, wherein the third shaft hole is matched with the second cam, the fourth shaft hole is matched with the second eccentric shaft, and a preset second eccentric amount is arranged between the third shaft hole and the fourth shaft hole;
A measuring bar, a first end of the measuring bar is connected to the integral shaft sleeve, a second end is a free end, and
The altimeter is connected to the base;
the zero correction block is connected to the base;
the first shaft hole and the inner wall of the second shaft hole are respectively provided with balls.
2. The eccentric shaft testing fixture of claim 1, wherein the integral bushing comprises a first connecting plate and a second connecting plate detachably connected together, the third shaft hole is formed on the first connecting plate, and the fourth shaft hole is formed on the second connecting plate.
3. The eccentric shaft testing fixture of claim 1, wherein the first eccentric shaft sleeve is slidably coupled to the base, the first eccentric shaft sleeve being movable between a distal position away from the first cam sleeve and a proximal position proximal to the first cam sleeve.
4. The eccentric shaft gauge of claim 1, wherein a first end of the measuring strip is bolted to the integral bushing, and a second end of the measuring strip is formed with a flattened measuring portion.
5. The eccentric shaft gauge of claim 1, wherein the altimeter is a dial gauge.
6. The eccentric shaft gauge of claim 5, wherein the dial indicator comprises a gauge stand, a gauge head and a gauge needle, the gauge stand is connected to the base, the gauge head is connected to the gauge stand, and the gauge needle is connected to the gauge head and can move up and down in the vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010370650.0A CN111397491B (en) | 2020-05-06 | 2020-05-06 | An eccentric shaft inspection tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010370650.0A CN111397491B (en) | 2020-05-06 | 2020-05-06 | An eccentric shaft inspection tool |
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| Publication Number | Publication Date |
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| CN111397491A CN111397491A (en) | 2020-07-10 |
| CN111397491B true CN111397491B (en) | 2025-03-14 |
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| CN202010370650.0A Active CN111397491B (en) | 2020-05-06 | 2020-05-06 | An eccentric shaft inspection tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112461098B (en) * | 2020-10-19 | 2022-07-12 | 中能（天津）智能传动设备有限公司 | Detection method for crankshaft eccentric shaft diameter consistency production field |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211824230U (en) * | 2020-05-06 | 2020-10-30 | 无锡市世标精密机械制造有限公司 | Eccentric shaft detection tool |
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| JPS60166801A (en) * | 1984-02-09 | 1985-08-30 | Dainichi Nippon Cables Ltd | Aerial line inspecting/measuring apparatus |
| CN102937405A (en) * | 2012-10-26 | 2013-02-20 | 中国北车集团大连机车车辆有限公司 | Camshaft phase angle detection method for large diesel engine |
| CN103063106B (en) * | 2012-12-24 | 2016-04-06 | 安徽华菱汽车有限公司 | A kind of measurement frock of camshaft and measuring method |
| CN203364745U (en) * | 2013-07-30 | 2013-12-25 | 苏州勤美达精密机械有限公司 | Measuring device for phase angle of double-eccentric crankshaft |
| CN204085885U (en) * | 2014-08-27 | 2015-01-07 | 江苏润源控股集团有限公司 | Connecting rod rest component synchronization detector |
| CN204585147U (en) * | 2015-05-05 | 2015-08-26 | 南车戚墅堰机车有限公司 | A kind of cam shaft for diesel engine installs locate mode |
| CN106767336A (en) * | 2016-12-28 | 2017-05-31 | 重庆市银钢通科技有限公司 | A kind of cam phase angle judges cubing |
| CN206330535U (en) * | 2016-12-28 | 2017-07-14 | 重庆市银钢一通科技有限公司 | A kind of cam phase angle judges cubing |
| CN208223372U (en) * | 2018-05-31 | 2018-12-11 | 临安天顺汽车零部件有限公司 | A kind of camshaft phase angle measuring device |
| CN209197659U (en) * | 2019-01-30 | 2019-08-02 | 威海海洋职业学院 | A kind of quick test fixture of eccentric shaft concentricity |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211824230U (en) * | 2020-05-06 | 2020-10-30 | 无锡市世标精密机械制造有限公司 | Eccentric shaft detection tool |
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