CN108534718B - Axis parallelism detection device of eccentric shaft - Google Patents
Axis parallelism detection device of eccentric shaft Download PDFInfo
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- CN108534718B CN108534718B CN201810715879.6A CN201810715879A CN108534718B CN 108534718 B CN108534718 B CN 108534718B CN 201810715879 A CN201810715879 A CN 201810715879A CN 108534718 B CN108534718 B CN 108534718B
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- rocker arm
- eccentric shaft
- axis
- large rocker
- face
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B13/00—Measuring arrangements characterised by the use of fluids
- G01B13/18—Measuring arrangements characterised by the use of fluids for measuring angles or tapers; for testing the alignment of axes
Abstract
The invention discloses an axis parallelism detection device of an eccentric shaft, which comprises a detection platform, a main shaft limiting mechanism and a detection mechanism, wherein the detection platform is used for detecting the axis parallelism of the eccentric shaft; the main shaft limiting mechanism comprises two V-shaped blocks arranged on the upper end surface of the detection platform; the detection mechanism comprises a large rocker arm and a small rocker arm which are rotatably arranged, the small rocker arm is arranged right above the large rocker arm, and a gap is formed between the upper end face of the large rocker arm and the lower end face of the small rocker arm; the upper end face of the large rocker arm is provided with a first supporting edge, and the upper end face of the small rocker arm is provided with a second supporting edge; when the main shaft axis of the eccentric shaft is parallel to the eccentric shaft axis, and the eccentric shaft is rotated along the main shaft axis of the eccentric shaft, the small rocker arm keeps static relative to the large rocker arm; when the main shaft axis of the eccentric shaft is not parallel to the eccentric shaft axis, and the eccentric shaft is rotated along the main shaft axis of the eccentric shaft, the small rocker arm rotates up and down relative to the large rocker arm, the distance change of the gap between the large rocker arm and the small rocker arm is measured through the range finder, the axis parallelism of the eccentric shaft is detected, and the detection precision is greatly improved.
Description
Technical Field
The invention relates to the technical field of detection, in particular to an axis parallelism detection device of an eccentric shaft.
Background
With the great development of automobile, general gasoline and diesel engine, motorcycle and refrigeration compressor parts, the required detection items of the eccentric shafts such as crankshaft and crank combination are greatly increased, wherein the difficulty is the detection of the parallelism of the two axes of the main shaft of the eccentric shaft and the eccentric shaft positioned at the eccentric position of the main shaft. Because the eccentric shaft center of the eccentric shaft and the spindle center are measured to have an eccentric amount, the eccentric shaft center and the spindle center are not on the same rotary axis, and when the spindle rotates along the axis, the eccentric shaft axis rotates and swings, so that the eccentric shaft axis is difficult to position and sample when the axis parallelism of the eccentric shaft is detected.
In the existing detection device, two ultra-wide range distance sensors or mechanical measuring meters for ranging are generally adopted to detect along with the track of the swinging of the eccentric shaft. Because the ultra-large range sensor or mechanical gauge is limited by the machining precision, the precision can not meet the ideal requirement. The measurement accuracy of a distance sensor or a mechanical measuring meter with an ultra-large range is low, and the measurement accuracy is generally not higher than 0.05mm.
In the existing detection device, a grating ranging sensor is also used for measurement, but the method has the disadvantages of slow sensor measurement frequency response, high-precision grating cost, low detection speed, high requirement on measurement environment and the like.
In summary, to detect the axis parallelism of the shaft containing the eccentricity, a measuring instrument which is convenient to use, high in measuring speed, low in environmental requirement and high in measuring precision is required.
Disclosure of Invention
The invention aims to provide an axis parallelism detection device for an eccentric shaft, which can detect the axis parallelism of a main shaft and an eccentric shaft of the eccentric shaft, and has high detection precision and convenient operation.
The invention adopts the technical scheme that:
the axis parallelism detection device of the eccentric shaft comprises a detection platform, a main shaft limiting mechanism and a detection mechanism; the main shaft limiting mechanism comprises two V-shaped blocks for supporting the main shaft; the two V-shaped blocks are arranged on the upper end surface of the detection platform along the left-right direction;
the detection mechanism comprises a first mounting frame, a large rocker arm, a second mounting frame, a small rocker arm and a range finder, wherein a distance sensor is arranged in the range finder; the first mounting frame is fixedly arranged on the upper end face of the detection platform, the large rocker arm is rotationally connected with the first mounting frame, the large rocker arm is arranged in the front-back direction and is positioned on the right side of the main shaft limiting mechanism, the small rocker arm is arranged right above the large rocker arm in the front-back direction, the second mounting frame is fixedly connected with the large rocker arm, and the small rocker arm is rotationally connected with the second mounting frame; a gap is formed between the upper end face of the large rocker arm and the lower end face of the small rocker arm; the upper end face of the large rocker arm is provided with a first supporting blade for supporting the eccentric shaft, and the upper end face of the small rocker arm is provided with a second supporting blade corresponding to the first supporting blade; the large rocker arm is provided with a ranging through hole from top to bottom, the range finder is fixedly arranged on the lower end face of the large rocker arm, and a distance sensor in the range finder is positioned at the ranging through hole;
when the main shaft axis of the eccentric shaft is parallel to the eccentric shaft axis, and the eccentric shaft is rotated along the main shaft axis of the eccentric shaft, the small rocker arm keeps static relative to the large rocker arm; when the main shaft axis of the eccentric shaft is not parallel to the eccentric shaft axis, the small rocker arm rotates up and down relative to the large rocker arm when the eccentric shaft rotates along the main shaft axis of the eccentric shaft.
The detection mechanism also comprises a large rocker arm reset spring and a small rocker arm reset spring, one end of the large rocker arm reset spring is fixedly connected with the lower end face of the large rocker arm, and the other end of the large rocker arm reset spring is fixedly connected with the detection platform; one end of the small rocker arm reset spring is fixedly connected with the lower end face of the small rocker arm, and the other end of the small rocker arm reset spring is fixedly connected with the large rocker arm.
The axis parallelism detection device of the eccentric shaft further comprises an off-axis limiting device, and the off-axis limiting device is fixedly arranged on the right side of the large rocker arm; the off-axis limiting device comprises an off-axis limiting block corresponding to the second cutting edge and a fixing plate for fixing the off-axis limiting block, and the off-axis limiting block is fixedly connected with the detection platform through the fixing plate.
The axis parallelism detection device of the eccentric shaft further comprises a large rocker arm limiting device used for limiting the angular displacement of the large rocker arm, the large rocker arm limiting device comprises a limiting column fixedly arranged on the side wall of the large rocker arm and a large rocker arm limiting plate corresponding to the limiting plate, the large rocker arm is fixedly arranged on the upper end face of the detection platform, the large rocker arm limiting plate is provided with a limiting hole matched with the limiting column, and the limiting hole is a long waist hole.
The axis parallelism detection device of the eccentric shaft also comprises a protective shell covered at the rotating end of the large rocker arm and the rotating end of the small rocker arm.
An anti-collision block is arranged in the protective shell corresponding to the upper end face of the large rocker arm.
The distance sensor in the range finder is a pneumatic sensor.
The range finder is a gas-electric electron column micrometer.
The gas-electric electron column micrometer comprises a pneumatic sensor, an air source, an air filter, an air valve, a voltage stabilizer, a gas-electric converter, a linear amplifying circuit, an analog-to-digital conversion module, a processor, a touch display screen and a data storage chip; the air source sequentially passes through the air filter, the air valve and the pressure stabilizer to be connected with the air inlet of the pneumatic sensor, the air outlet of the pneumatic sensor is sequentially connected with the pneumatic-electric converter, the signal output end of the pneumatic-electric converter is connected with the input end of the analog-digital conversion module through the linear amplifying circuit, the output end of the analog-digital conversion module is connected with the signal input end of the processor, the processor is connected with the touch display screen, and the processor and the data storage chip are connected.
The gas electric electron column micrometer also comprises a qualification indicator lamp, a disqualification indicator lamp, a serious deviation indicator lamp and an indicator lamp control circuit, wherein the indicator lamp control end of the processor is connected with the qualification indicator lamp, the disqualification indicator lamp and the serious deviation indicator lamp through the indicator lamp control circuit.
According to the invention, a main shaft of an eccentric shaft is clamped in a V-shaped block, a first supporting edge is arranged, the cutting edge of the first supporting edge is tangent to the first circumference of an eccentric shaft, a second supporting edge is tangent to the second circumference of the eccentric shaft, the eccentric shaft is rotated, the first circumference of the eccentric shaft is ensured to roll along the cutting edge of the first supporting edge by a large rocker arm which rotates up and down, and the second circumference of the eccentric shaft is ensured to roll along the cutting edge of the second supporting edge by a small rocker arm which rotates up and down; the positions of the large rocker arm and the small rocker arm are adjusted by utilizing a standard part, so that the spindle axis of the eccentric shaft and the axis of the eccentric shaft are parallel, the cutting edge of the first supporting edge and the cutting edge of the second supporting edge are parallel to each other and are vertical relative to the spindle axis; when the main shaft axis and the eccentric shaft axis of the eccentric shaft to be detected are not parallel, the small rocker arm rotates up and down relatively to the large rocker arm in the rolling process of the second circumference of the eccentric shaft along the cutting edge of the second supporting edge, the distance between the upper end face of the large rocker arm and the lower end face of the small rocker arm changes, so that the included angle which is difficult to monitor between the eccentric shaft axis and the main shaft axis is converted into the length of the opposite side corresponding to the included angle, whether the eccentric shaft axis and the main shaft axis are parallel or not is detected by detecting whether the length of the opposite side is zero or not, and the distance sensor for two oversized measuring ranges or a mechanical measuring meter for measuring distance detects along with the track of the rotation swing of the eccentric shaft, wherein the measuring precision can reach 0.0005mm, the measuring precision is greatly improved, and the operation is convenient and quick.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;
FIG. 4 is a measurement state diagram of the eccentric shaft standard;
FIG. 5 is a measurement state diagram of eccentric shaft non-standard part
FIG. 6 is a schematic block diagram of a gas-electric electron column micrometer of the present invention;
FIG. 7 is a schematic diagram of a protective shell structure according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "left and right", "front and rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, 2 and 3, the invention comprises a detection platform 1, a main shaft 3-1 limiting mechanism and a detection mechanism; the main shaft 3-1 limiting mechanism comprises two V-shaped blocks 2 for supporting the main shaft 3-1; the two V-shaped blocks 2 are arranged on the upper end face of the detection platform 1 along the left-right direction; the two ends of the main shaft 3-1 of the eccentric shaft 3 are respectively placed in the V-shaped grooves of the two V-shaped blocks 2, and the main shaft 3-1 is contacted with the V-shaped positioning surfaces of the V-shaped blocks 2.
The detection mechanism comprises a first mounting frame 4, a large rocker arm 5, a second mounting frame 6, a small rocker arm 7 and a range finder 8; the large rocker arm 5 is arranged along the front-back direction and is positioned on the right side of the main shaft 3-1 limiting mechanism; the first mounting frame 4 is fixedly arranged on the upper end face of the detection platform 1, a first rotating shaft 4-1 and a first bearing 4-2 matched with the first rotating shaft 4-1 are arranged in the first mounting frame 4, the rear end of the large rocker arm 5 is rotationally connected with the first mounting frame 4 through the first rotating shaft 4-1, and the large rocker arm 5 rotates along the up-down direction; the small rocker arm 7 is arranged right above the large rocker arm 5 along the front-rear direction, the second mounting frame 6 is two clamping plates arranged on the left side and the right side of the small rocker arm 7, the small rocker arm 7 is fixedly arranged on the large rocker arm 5, a second rotating shaft 6-1 is arranged between the two clamping plates, second bearings matched with the second rotating shaft 6-1 are respectively arranged on the two clamping plates, and the rear end of the small rocker arm 7 is in rotary connection with the second mounting frame 6 through the cooperation of the second rotating shaft 6-1 and the second bearings. A gap is arranged between the upper end face of the large rocker arm 5 and the lower end face of the small rocker arm 7.
The precision of the large rocker arm 5 bearing is not lower than 0.0002mm, the high-precision bearing can not meet the requirement, a self-made tip socket type sliding bearing is adopted, the tip and the socket are fully matched and ground, and the interference pre-tightening is realized.
The rotation precision of the bearing of the small rocker arm 7 is not lower than 0.0002mm, a self-made 1:3000 taper hole taper shaft type sliding bearing is adopted, the small rocker arm 7 is assembled in a small excessive fit manner, and the small rocker arm 7 slides in a small range up and down in a gap between the large rocker arm 5 and the clamping plate.
The straightness of the first supporting edge 9 and the second supporting edge 10 and the parallelism of the assembled zero position are not more than 0.0001mm, and the method of integral fine grinding adjustment after the large rocker arm 5 and the small rocker arm 7 are assembled into a group is adopted.
The upper end face of the front end of the large rocker arm 5 is provided with a first supporting blade 9 for supporting the deflection shaft 3-2, the circumference of the deflection shaft 3-2 where the contact point with the first supporting blade 9 is located is set to be the first circumference of the deflection shaft, the cutting edge of the first supporting blade 9 is tangential to the first circumference of the deflection shaft, the upper end face of the front end of the small rocker arm 7 is provided with a second supporting blade 10 corresponding to the first supporting blade 9, the cutting edge of the second supporting blade 10 is tangential to the second circumference of the deflection shaft, and the circumference of the deflection shaft 3-2 where the contact point with the second supporting blade 10 is set to be the second circumference of the deflection shaft 3-2; the large rocker arm 5 is provided with a ranging through hole from top to bottom, the range finder 8 is fixedly arranged on the lower end surface of the large rocker arm 5, the range finder 8 comprises a distance sensor, and the distance sensor in the range finder 8 is arranged at the ranging through hole; distance between the distance meter 8 and the lower end surface of the small rocker arm 7.
When the main shaft 3-1 axis of the eccentric shaft 3 and the eccentric shaft 3-2 axis are parallel, the small rocker arm 7 is kept stationary relative to the large rocker arm 5 when the eccentric shaft 3 is rotated along the main shaft 3-1 axis of the eccentric shaft 3; when the main shaft 3-1 axis of the eccentric shaft 3 and the eccentric shaft 3-2 axis are not parallel, the small rocker arm 7 rotates up and down relative to the large rocker arm 5 when the eccentric shaft 3 is rotated along the main shaft 3-1 axis of the eccentric shaft 3.
As shown in fig. 4 and 5, the working principle and working procedure of the present invention are as follows:
the invention is based on a comparative measurement method and only detects the parallelism of the eccentric shafts 3 of a single model.
Firstly, the invention is subjected to zero setting: the standard component of the eccentric shaft 3 is placed on the axis parallelism detecting device of the eccentric shaft 3, the main shaft 3-1 of the eccentric shaft 3 is placed on the two V-shaped blocks 2, and the side wall of the eccentric shaft 3-2 is respectively contacted with the first supporting blade 9 and the second supporting blade 10; the axis of the eccentric shaft 3-2 between the eccentric shaft 3 standard part eccentric shaft first circumference and the eccentric shaft 3-2 second circumference is parallel to the axis of the main shaft 3-1; the main shaft 3-1 of the eccentric shaft 3 rotates back and forth along the axis of the main shaft 3-1, and the eccentric shaft 3-2 of the eccentric shaft 3 also rotates along the axis of the main shaft 3-1 in a follow-up way; because the large rocker arm 5 is rotationally connected with the first mounting frame 4, in the rotating process of the eccentric shaft 3 and the eccentric shaft 3-2, the first circumference of the eccentric shaft 3 rolls back and forth along the first supporting edge 9, and the large rocker arm 5 rolls up and down; because the first circumference of the eccentric shaft and the second circumference of the eccentric shaft 3-2 and the eccentric shaft 3-2 are concentric, the second circumference of the eccentric shaft 3-2 on the eccentric shaft rolls back and forth along the second supporting edge 10, and no relative displacement occurs between the small rocker arm 7 and the large rocker arm 5. The setting of the axis parallelism detection device of the eccentric shaft 3 is completed, and at the moment, the distance between the distance meter 8 and the lower end surface of the small rocker arm 7 is standard.
And after the zero setting is completed, detecting the axis parallelism of the eccentric shaft 3 to be detected.
Placing the eccentric shaft 3 to be detected on an axis parallelism detecting device of the eccentric shaft 3; the two ends of the main shaft 3-1 of the eccentric shaft 3 to be detected are respectively arranged on the V-shaped block 2, the side wall of the eccentric shaft 3-2 is respectively contacted with the first supporting edge 9 and the second supporting edge 10, in the process, the distance between the range finder 8 and the lower end surface of the small rocker arm 7 is a measuring distance, and in the rotating process of the eccentric shaft 3, the range finder 8 collects a plurality of distance measuring distances; the eccentric shaft 3 is rotated back and forth along the axis of the main shaft 3-1, and the first circumference of the eccentric shaft on the eccentric shaft 3-2 rolls on the first supporting edge 9 to drive the large rocker arm 5 to rotate up and down; the second circumference of the eccentric shaft 3-2 on the eccentric shaft 3-2 rolls on the second supporting edge 10; if the axis of the main shaft 3-1 is parallel to the axis of the eccentric shaft 3-2, the first circumference of the eccentric shaft is concentric with the second circumference of the eccentric shaft 3-2, and no relative displacement occurs between the large rocker arm 5 and the small rocker arm 7; the measurement intervals are equal to the standard intervals; if the axis of the spindle 3-1 is not parallel to the axis of the eccentric shaft 3-2, the first circumference of the eccentric shaft is not concentric with the second circumference of the eccentric shaft 3-2, the first circumference of the eccentric shaft on the eccentric shaft 3-2 rolls on the first supporting edge 9 in the rotation process of the eccentric shaft 3, and the second circumference of the eccentric shaft 3-2 on the eccentric shaft 3-2 rolls on the second supporting edge 10, so that relative displacement occurs between the large rocker arm 5 and the small rocker arm 7, and a plurality of measuring intervals are not equal to the standard intervals. Wherein, the distance measurement distance with the largest deviation from the standard distance is the off-axis distance;
and setting a deviation interval = off-axis interval-standard distance, wherein the deviation interval is the length of the opposite side of an included angle between the axis of the main shaft 3-1 and the axis of the off-axis 3-2, and the deviation interval represents the axis parallelism of the eccentric shaft 3. The larger the absolute value of the offset spacing, the larger the offset angle between the main shaft 3-1 axis of the eccentric shaft 3 and the eccentric shaft 3-2 axis.
According to the invention, a main shaft 3-1 of an eccentric shaft 3 is clamped in a V-shaped block 2, a first supporting edge 9 is arranged, the cutting edge of the first supporting edge 9 is tangent to the first circumference of an eccentric shaft, a second supporting edge 10 is tangent to the second circumference of the eccentric shaft, the eccentric shaft 3 is rotated, a large rocker arm 5 which rotates up and down ensures that the first circumference of the eccentric shaft rolls along the cutting edge of the first supporting edge 9, and a small rocker arm 7 which rotates up and down ensures that the second circumference of the eccentric shaft 3-2 rolls along the cutting edge of the second supporting edge 10; the positions of the large rocker arm 5 and the small rocker arm 7 are adjusted by using a standard part, so that the axis of the main shaft 3-1 of the eccentric shaft 3 and the axis of the eccentric shaft 3-2 are parallel, the cutting edge of the first supporting blade 9 and the cutting edge of the second supporting blade 10 are parallel to each other, and are vertical relative to the axis of the main shaft 3-1; when the axis of the main shaft 3-1 of the eccentric shaft 3 to be detected and the axis of the eccentric shaft 3-2 are not parallel, the small rocker arm 7 rotates up and down relative to the large rocker arm 5 in the rolling process of the second circumference of the eccentric shaft 3-2 along the cutting edge of the second supporting edge 10, the distance between the upper end surface of the large rocker arm 5 and the lower end surface of the small rocker arm 7 changes, so that the included angle which is difficult to monitor between the axis of the eccentric shaft 3-2 and the axis of the main shaft 3-1 is converted into the length of the opposite side corresponding to the included angle, whether the axis of the eccentric shaft 3-2 and the axis of the main shaft 3-1 are parallel is detected by detecting whether the length of the opposite side is zero, and the measuring precision can reach 0.0005mm relative to the two ultra-large range distance sensors or the mechanical measuring meter for measuring the distance along with the track of the swinging of the rotation of the eccentric shaft 3, and the measuring precision is greatly improved, and the operation is convenient and quick.
The distance meter 8 adopts a non-contact distance meter 8, and in this embodiment, the distance sensor in the distance meter 8 is a pneumatic sensor. The range finder 8 is a gas-electric electron column micrometer.
As shown in fig. 6, the pneumoelectric electron column micrometer comprises a pneumatic sensor, a gas source, an air filter, a gas valve, a voltage stabilizer, a pneumoelectric converter, a linear amplifying circuit, an analog/digital conversion module, a processor, a touch display screen and a data storage chip; the gas-electric converter is QF-AH4 type gas-electric converter. The air source sequentially passes through the air filter, the air valve and the pressure stabilizer to be connected with the air inlet of the pneumatic sensor, the air outlet of the pneumatic sensor is sequentially connected with the pneumatic-electric converter, the signal output end of the pneumatic-electric converter is connected with the input end of the analog-digital conversion module through the linear amplifying circuit, the output end of the analog-digital conversion module is connected with the signal input end of the processor, the processor is connected with the touch display screen, and the processor and the data storage chip are connected. The gas electric electron column micrometer also comprises a qualification indicator lamp, a disqualification indicator lamp, a serious deviation indicator lamp and an indicator lamp control circuit, wherein the indicator lamp control end of the processor is connected with the qualification indicator lamp, the disqualification indicator lamp and the serious deviation indicator lamp through the indicator lamp control circuit.
The processor adopts 51 series single chip microcomputer.
And setting qualified critical and serious deviation critical values in a processor, and inputting the standard interval when the device returns to zero. In the rotation process of the eccentric shaft 3, a pneumatic sensor in the gas-electric electron column micrometer collects a distance signal between the pneumatic sensor and the lower end face of the small rocker arm 7, the distance signal is converted into an electric signal through a gas-electric converter, and the electric signal is converted into a measurement distance through an analog-to-digital conversion module. The processor compares each measured pitch with the standard pitch, and selects the measured pitch with the largest deviation from the standard pitch as the off-axis pitch.
The offset spacing is calculated via a processor.
The deviation direction of the eccentric shaft 3-2 of the eccentric shaft 3 can be judged according to the sign of the deviation distance. Comparing the absolute value of the off-axis spacing with a qualified critical value and a serious deviation critical value, and if the absolute value of the deviation spacing of the eccentric shaft 3 is within [0 ] and the qualified critical value ], controlling the qualified indicator lamp to be turned on by the processor through the indicator lamp control circuit; if the absolute value of the off-axis distance of the eccentric shaft 3 falls within (qualified critical value, serious deviation critical value), the processor controls the unqualified indicator lamp to light up through the indicator lamp control circuit, and if the absolute value of the off-axis distance of the eccentric shaft 3 is larger than the serious deviation critical value, the processor controls the serious deviation indicator lamp to light up through the indicator lamp control circuit.
The arrangement of the qualified indicator lamp, the unqualified indicator lamp and the serious deviation indicator lamp is convenient for staff to intuitively, rapidly and accurately judge whether the eccentric shaft 3 is qualified or not, judge the unqualified degree of the eccentric shaft 3, classify the eccentric shaft 3 and facilitate the follow-up work.
The data storage chip stores the detected off-axis distance of the eccentric shaft 3, and the off-axis distance is checked through the touch display screen, so that problem tracing, data statistics and analysis of the eccentric shaft 3 and equipment fault searching are facilitated.
The detection mechanism also comprises a large rocker arm reset spring 17 and a small rocker arm reset spring 18, one end of the large rocker arm reset spring 17 is fixedly connected with the lower end face of the large rocker arm 5, the other end of the large rocker arm reset spring 17 is fixedly connected with the detection platform 1, when the large rocker arm 5 rotates up and down along the first circumference of the eccentric shaft, the cutting edge of the first supporting blade 9 is tightly attached to the first circumference of the eccentric shaft, and the detection accuracy is improved; one end of the small rocker arm reset spring 18 is fixedly connected with the lower end face of the small rocker arm 7, the other end of the small rocker arm reset spring is fixedly connected with the large rocker arm 5, and therefore when the small rocker arm 7 rotates up and down along the second circumference of the eccentric shaft 3-2, the cutting edge of the second supporting blade 10 is tightly attached to the second circumference of the eccentric shaft 3-2, and the detection accuracy is improved. The gap between the large rocker arm 5 and the small rocker arm 7 is 0.003-0.005 mm, and if the cutting edge of the first supporting blade 9 or the cutting edge of the second supporting blade 10 is not attached to the shaft wall of the eccentric shaft 3-2, the detection precision can be greatly affected.
The axis parallelism detection device of the eccentric shaft 3 further comprises an off-axis limiting device which is fixedly arranged on the right side of the large rocker arm 5; the off-axis limiting device comprises an off-axis limiting block 11 and a fixing plate 12, wherein the off-axis limiting block 11 corresponds to the second cutting edge, and the fixing plate 12 is used for fixing the off-axis limiting block 11, and the off-axis limiting block 11 is fixedly connected with the detection platform 1 through the fixing plate 12.
In the rotation process of the eccentric shaft 3, the right end of the eccentric shaft 3-2 is attached to the eccentric shaft limiting block 11, so that left-right movement of the eccentric shaft 3 is prevented, and the detection precision is further improved.
The axis parallelism detection device of the eccentric shaft 3 further comprises a large rocker arm limiting device for limiting the angular displacement of the large rocker arm 5, the large rocker arm limiting device comprises a limiting column 13 fixedly arranged on the side wall of the large rocker arm 5 and a large rocker arm limiting plate 14 corresponding to the limiting plate, the large rocker arm 5 is fixedly arranged on the upper end face of the detection platform 1, the large rocker arm limiting plate 14 is provided with a limiting hole 14-1 matched with the limiting column 13, the limiting hole 14-1 is a long waist hole, the large rocker arm 5 only rotates up and down in a certain angle to prevent the large rocker arm 5 from excessively rotating, so that invalid abrasion of the first bearing 4-2 is prevented, the connection part with the first rotating shaft 4-1 is prevented from loosening more quickly, and the service life of the device is prolonged.
The axis parallelism detection device of the eccentric shaft 3 further comprises a protective shell 15 covering the rotating ends of the large rocker arm 5 and the small rocker arm 7, bearings of the rotating ends of the large rocker arm 5 and the small rocker arm 7 are protected from being corroded or polluted easily, the bearing precision of the first bearing 4-2 and the second bearing is guaranteed, and accordingly the detection precision of the device is guaranteed.
As shown in fig. 7, an anti-collision block 16 is disposed in the protective housing 15 corresponding to the upper end surface of the large rocker arm 5. The small rocker arm 7 or the large rocker arm 5 is prevented from colliding with the protection box in the upward rotation process, and the service life of the device is ensured.
Claims (10)
1. An axis parallelism detection device of eccentric shaft, its characterized in that: the device comprises a detection platform, a main shaft limiting mechanism and a detection mechanism; the main shaft limiting mechanism comprises two V-shaped blocks for supporting the main shaft; the two V-shaped blocks are arranged on the upper end surface of the detection platform along the left-right direction;
the detection mechanism comprises a first mounting frame, a large rocker arm, a second mounting frame, a small rocker arm and a range finder, wherein a distance sensor is arranged in the range finder; the first mounting frame is fixedly arranged on the upper end face of the detection platform, the large rocker arm is rotationally connected with the first mounting frame, the large rocker arm is arranged in the front-back direction and is positioned on the right side of the main shaft limiting mechanism, the small rocker arm is arranged right above the large rocker arm in the front-back direction, the second mounting frame is fixedly connected with the large rocker arm, and the small rocker arm is rotationally connected with the second mounting frame; a gap is formed between the upper end face of the large rocker arm and the lower end face of the small rocker arm; the upper end face of the large rocker arm is provided with a first supporting blade for supporting the eccentric shaft, and the upper end face of the small rocker arm is provided with a second supporting blade corresponding to the first supporting blade; the large rocker arm is provided with a ranging through hole from top to bottom, the range finder is fixedly arranged on the lower end face of the large rocker arm, and a distance sensor in the range finder is positioned at the ranging through hole;
when the main shaft axis of the eccentric shaft is parallel to the eccentric shaft axis, and the eccentric shaft is rotated along the main shaft axis of the eccentric shaft, the small rocker arm keeps static relative to the large rocker arm; when the main shaft axis of the eccentric shaft is not parallel to the eccentric shaft axis, the small rocker arm rotates up and down relative to the large rocker arm when the eccentric shaft rotates along the main shaft axis of the eccentric shaft.
2. The axis parallelism detecting device of an eccentric shaft according to claim 1, wherein: the detection mechanism also comprises a large rocker arm reset spring and a small rocker arm reset spring, one end of the large rocker arm reset spring is fixedly connected with the lower end face of the large rocker arm, and the other end of the large rocker arm reset spring is fixedly connected with the detection platform; one end of the small rocker arm reset spring is fixedly connected with the lower end face of the small rocker arm, and the other end of the small rocker arm reset spring is fixedly connected with the large rocker arm.
3. The axis parallelism detecting device of an eccentric shaft according to claim 1, wherein: the device also comprises an off-axis limiting device which is fixedly arranged on the right side of the large rocker arm; the off-axis limiting device comprises an off-axis limiting block corresponding to the second cutting edge and a fixing plate for fixing the off-axis limiting block, and the off-axis limiting block is fixedly connected with the detection platform through the fixing plate.
4. The axis parallelism detecting device of an eccentric shaft according to claim 1, wherein: the large rocker arm limiting device comprises a limiting column fixedly arranged on the side wall of the large rocker arm and a large rocker arm limiting plate corresponding to the limiting plate, the large rocker arm is fixedly arranged on the upper end face of the detection platform, the large rocker arm limiting plate is provided with a limiting hole matched with the limiting column, and the limiting hole is a long waist hole.
5. The axis parallelism detecting device of an eccentric shaft according to claim 1, wherein: the device also comprises a protective shell covered on the rotating end of the large rocker arm and the rotating end of the small rocker arm.
6. The axis parallelism detecting apparatus of an eccentric shaft according to claim 5, wherein: an anti-collision block is arranged in the protective shell corresponding to the upper end face of the large rocker arm.
7. The axis parallelism detecting device of an eccentric shaft according to claim 1, wherein: the distance sensor in the range finder is a pneumatic sensor.
8. The axis parallelism detecting apparatus of an eccentric shaft according to claim 7, wherein: the range finder is a gas-electric electron column micrometer.
9. The axis parallelism detecting device of an eccentric shaft according to claim 8, wherein: the gas-electric electron column micrometer comprises a pneumatic sensor, an air source, an air filter, an air valve, a voltage stabilizer, a gas-electric converter, a linear amplifying circuit, an analog-to-digital conversion module, a processor, a touch display screen and a data storage chip; the air source sequentially passes through the air filter, the air valve and the pressure stabilizer to be connected with the air inlet of the pneumatic sensor, the air outlet of the pneumatic sensor is sequentially connected with the pneumatic-electric converter, the signal output end of the pneumatic-electric converter is connected with the input end of the analog-digital conversion module through the linear amplifying circuit, the output end of the analog-digital conversion module is connected with the signal input end of the processor, the processor is connected with the touch display screen, and the processor and the data storage chip are connected.
10. The axis parallelism detecting apparatus of an eccentric shaft according to claim 9, wherein: the gas electric electron column micrometer also comprises a qualification indicator lamp, a disqualification indicator lamp, a serious deviation indicator lamp and an indicator lamp control circuit, wherein the indicator lamp control end of the processor is connected with the qualification indicator lamp, the disqualification indicator lamp and the serious deviation indicator lamp through the indicator lamp control circuit.
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| CN201810715879.6A CN108534718B (en) | 2018-07-03 | 2018-07-03 | Axis parallelism detection device of eccentric shaft |
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|---|---|
| CN108534718A (en) | 2018-09-14 |
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