CN210374944U

CN210374944U - Eccentric shaft measuring instrument

Info

Publication number: CN210374944U
Application number: CN201921825631.1U
Authority: CN
Inventors: 瞿波; 秦利明; 龚智鹏; 杨夏洁; 夏丽君; 宋存贵; 钱桢涛
Original assignee: Taizhou University
Current assignee: Taizhou University
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-04-21
Anticipated expiration: 2029-10-28

Abstract

The utility model provides an eccentric shaft measuring apparatu belongs to the part and measures technical field, improves eccentricity measurement precision and measurement of efficiency. The eccentric shaft measuring instrument comprises a workbench and is characterized in that one end of the top surface of the workbench is vertically provided with a first linear guide rail group, the top surface of the workbench is longitudinally provided with a second linear guide rail group and a third linear guide rail group, a first deflection instrument tail is arranged on the first linear guide rail group, a second deflection instrument head is arranged on the second linear guide rail group, an instrument support is arranged on the third linear guide rail group, a micrometer is fixed on the instrument support and comprises an instrument body and a measuring rod, a measuring head is fixedly connected to the end of the measuring rod and comprises a measuring arc plate, a plurality of measuring rollers and a retainer, the outer arc surface of the measuring arc plate is fixed to the end of the measuring rod, the plurality of measuring rollers are distributed along the inner arc surface of the measuring plate through the retainer, and the plurality of measuring rollers are fixed to the retainer in an axial fixing circumferential. The utility model has the advantages of accurate measurement.

Description

Eccentric shaft measuring instrument

Technical Field

The utility model belongs to the technical field of the part is measured, a measuring apparatu, especially an eccentric shaft measuring apparatu is related to.

Background

The eccentricity of parts such as eccentric shafts, crankshafts and the like is usually measured on a yaw meter by using a dial indicator. During the measurement, the measuring head and the eccentric shaft contact of percentage table, then rotate the eccentric shaft, read out the reading of percentage table and ask to calculate the eccentricity, because the measuring head of percentage table is smaller, the eccentric shaft is rotating the in-process, the measuring head can not contact with the eccentric shaft cylinder face well, especially to the eccentric shaft of great eccentricity, influence measurement accuracy, in addition, need measure artifical reading while measuring during the measurement, appear artifical reading error easily and influence measurement of efficiency.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided an eccentric shaft measuring apparatu, solve the problem that exists among the background art, improved measurement accuracy and measurement of efficiency.

The purpose of the utility model can be realized by the following technical proposal: an eccentric shaft measuring instrument comprises a workbench and is characterized in that one end of the top surface of the workbench is vertically provided with a first linear guide rail group, the top surface of the workbench is longitudinally provided with a second linear guide rail group and a third linear guide rail group, a first deflection instrument tail is arranged on the first linear guide rail group, a first V-shaped groove is formed in the top end of the first deflection instrument tail, the first deflection instrument tail can lift along the first linear guide rail group, a second deflection instrument head is arranged on the second linear guide rail group, a second V-shaped groove is formed in the top end of the second deflection instrument head, the second deflection instrument head can longitudinally move along the second linear guide rail group, an instrument support is arranged on the third guide rail group, the instrument support can longitudinally move along the third linear guide rail group, a micrometer is fixed on the instrument support and comprises an instrument body and a measuring rod, a measuring head is fixedly connected to the end of the measuring rod, the measuring head comprises a measuring arc plate, a plurality of, the arc mouth of the measuring arc plate faces downwards, the outer arc surface of the measuring arc plate is fixed with the end part of the measuring rod, the plurality of measuring rollers are distributed along the inner arc surface of the measuring plate through the retainer, and the plurality of measuring rollers are fixed with the retainer in an axial fixing and circumferential rotating mode.

The working principle is as follows: according to the length of the crankshaft or the eccentric shaft to be measured, the distance between the head of the deflection instrument and the tail of the deflection instrument is adjusted through the linear guide rail set II, the height of the tail of the deflection instrument is adjusted through the linear guide rail set I, and the shaft shoulder of the crankshaft or the eccentric shaft is respectively placed on the V-shaped groove I of the head of the deflection instrument and the V-shaped groove II of the tail of the deflection instrument and is erected between the head of the deflection instrument and the tail of the deflection instrument. The position of the micrometer is adjusted through the three linear guide rail sets, the micrometer is located right above a measured shaft section of the crankshaft or the eccentric shaft, the measuring rod of the micrometer extends out, the measuring head is abutted against the measured shaft section, the crankshaft or the eccentric shaft is rotated, the measuring head generates vertical displacement, and the micrometer records data of the vertical displacement, so that the eccentricity of the crankshaft or the eccentric shaft is measured. Because the measuring head has a plurality of measuring rollers, these measuring rollers distribute along the intrados of measuring the board, compare the measuring head single-point contact of traditional percentage table for the eccentric shaft section of bent axle or eccentric shaft can contact with measuring roller more fully in rotatory in-process, improves the stability and the accuracy nature of measuring, improves measurement efficiency.

The first linear guide rail group comprises a first guide rail, a first screw rod and a first sliding block, the bottom end of the first guide rail is vertical and fixed with one end of the top surface of the workbench, the first sliding block is arranged on the first guide rail and can lift along the first guide rail, a driving motor is fixed at the top end of the first guide rail, the top end of the first screw rod is connected with an output shaft of the driving motor, the other end of the first screw rod penetrates through the first sliding block and can drive the first sliding block to lift, and the tail of the yaw instrument is fixed with the first sliding block.

The second linear guide rail group comprises a second guide rail and a second sliding block, the second guide rail is longitudinally fixed on the top surface of the workbench, the second sliding block is arranged on the second guide rail and can longitudinally slide along the second guide rail, and the head of the yaw instrument is fixed on the top of the second sliding block.

The third linear guide rail group comprises a third guide rail, a third screw rod and a third sliding block, the third guide rail is longitudinally fixed on the top surface of the workbench, the third sliding block is arranged on the third guide rail and can longitudinally slide along the third guide rail, one end of the third screw rod is fixedly connected with a hand wheel, and the other end of the third screw rod penetrates through the third sliding block and can drive the third sliding block to longitudinally move along the third guide rail.

The notch of the V-shaped groove I of the tail of the deflection instrument is provided with a wheel set I, and the notch of the V-shaped groove II of the head of the deflection instrument is provided with a wheel set II. The two ends of the tested crankshaft or eccentric shaft are supported through the first wheel set and the second wheel set, sliding friction between the eccentric shaft or the crankshaft and the first V-shaped groove and sliding friction between the eccentric shaft or the crankshaft and the second V-shaped groove are changed into rolling friction when the eccentric shaft or the crankshaft rotates, rotation is smooth, and measuring stability is improved.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses measuring speed is fast, compares with traditional percentage table measurement, and this measuring apparatu need not survey while reading, has saved a lot of artifical reading time.

2. The utility model discloses measured data is accurate, does not need the people to read data in the measurement process, error when having avoided artifical reading.

3. The utility model discloses, the eccentric shaft section of bent axle or eccentric shaft contacts with measuring the roller fully at rotatory in-process, improves measuring stability and accuracy nature.

Drawings

Fig. 1 is a schematic diagram of a forward axial measurement structure of the present invention.

Fig. 2 is a schematic diagram of the rear direction axial measurement structure of the present invention.

In the figure, 1, a workbench; 2. a yaw instrument tail; 3. a yaw instrument head; 4. an instrument holder; 5. a micrometer; 6. a body; 7. a measuring rod; 8. a measuring head; 9. measuring an arc plate; 10. measuring the roller; 11. a holder; 12. a first guide rail; 13. a first screw rod; 14. A first sliding block; 15. a drive motor; 16. a second guide rail; 17. a second sliding block; 18. a third guide rail; 19. a third screw; 20. a third sliding block; 21. a hand wheel; 22. a first wheel set; 23. a second wheel set; 24. a support rod; 25. a first roller; 26. a second roller; 27. a third roller; 28. And a fourth roller.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, an eccentric shaft measuring instrument comprises a workbench 1, and is characterized in that one end of the top surface of the workbench 1 is vertically provided with a first linear guide rail set, the top surface of the workbench 1 is longitudinally provided with a second linear guide rail set and a third linear guide rail set, the first linear guide rail set is provided with a first deflection instrument tail 2, the top end of the first deflection instrument tail 2 is provided with a first V-shaped groove, the first deflection instrument tail 2 can lift along the first linear guide rail set, the second linear guide rail set is provided with a second deflection instrument head 3, the top end of the second deflection instrument head 3 is provided with a second V-shaped groove, the second deflection instrument head 3 can longitudinally move along the second linear guide rail set, the third guide rail set is provided with an instrument support 4, the instrument support 4 can longitudinally move along the third guide rail set, a micrometer instrument 5 is fixed on the instrument support 4, the micrometer instrument 5 is a product of the prior art, the micrometer instrument 5 comprises a machine body 6 and a measuring rod 7, the end, the measuring head 8 comprises a measuring arc plate 9, a plurality of measuring rollers 10 and a retainer 11, an arc opening of the measuring arc plate 9 faces downwards, an outer arc surface of the measuring arc plate 9 is fixed with the end part of the measuring rod 7, the plurality of measuring rollers 10 are distributed along an inner arc surface of the measuring plate through the retainer 11, and the plurality of measuring rollers 10 are fixed with the retainer 11 in an axial fixing and circumferential rotating mode. In this embodiment, the holder 11 includes a spindle and a support rod 24, the measuring roller 10 has a central hole, the spindle is inserted and fixed in the central hole, both ends of the spindle are connected with the measuring arc plate 9 through the support rod 24, and both ends of the spindle are connected with the support rod 24 in an axially fixed and circumferentially rotating manner, so that the measuring roller 10 can rotate.

The measuring instrument is calibrated before use, and the calibration method comprises the following steps: a standard mandrel with the diameter of 30mm (the precision is 0.005mm) is placed on the head 3 and the tail of the head 3 of the deflection instrument, a dial indicator is used for manual leveling (note: the jump of the dial indicator does not exceed 0.02mm when the dial indicator moves in the horizontal direction is regarded as being leveled), and a crankshaft and an eccentric shaft can be measured after calibration. According to the length of a crankshaft or an eccentric shaft to be measured, the distance between a head 3 of the deflection instrument and a tail 2 of the deflection instrument is adjusted through a linear guide rail set II, the height of the tail 2 of the deflection instrument is adjusted through a linear guide rail set I, shaft shoulders of the crankshaft or the eccentric shaft are respectively placed on a V-shaped groove I of the head 3 of the deflection instrument and a V-shaped groove II of the tail 2 of the deflection instrument and are erected between the head 3 of the deflection instrument and the tail 2 of the deflection instrument. The position of the micrometer 5 is adjusted through the three linear guide rail sets, so that the micrometer 5 is positioned right above the measured shaft section of the crankshaft or the eccentric shaft, the measuring rod 7 of the micrometer 5 extends out, the measuring head 8 is abutted to the measured shaft section, the crankshaft or the eccentric shaft is rotated, the measuring head 8 generates vertical displacement, and the micrometer 5 records data of the vertical displacement, so that the eccentric distance of the crankshaft or the eccentric shaft is measured. Because the measuring head 8 is provided with a plurality of measuring rollers 10, and the measuring rollers 10 are distributed along the inner arc surface of the measuring plate, compared with the measuring head 8 of the traditional dial indicator in single-point contact, the measuring instrument enables the eccentric shaft section of the crankshaft or the eccentric shaft to be in more sufficient contact with the measuring rollers 10 in the rotating process, thereby improving the stability and the accuracy of measurement and improving the measuring efficiency.

The linear guide rail group I comprises a guide rail I12, a screw rod I13 and a slide block I14, the bottom end of the guide rail I12 is vertically fixed with one end of the top surface of the workbench 1, the slide block I14 is arranged on the guide rail I12 and can lift along the guide rail I12, the top end of the guide rail I12 is fixedly provided with a driving motor 15, the top end of the screw rod I13 is connected with an output shaft of the driving motor 15, the other end of the screw rod I13 penetrates through the slide block I14 and can drive the slide block I14 to lift, and the tail 2 of the deflection instrument is fixed with the. In this embodiment, the driving motor 15 is a 54-step motor with an encoder, an inner hole is formed in the first slider 14, a threaded sleeve is arranged in the inner hole, the first screw 13 is inserted into the threaded sleeve, and the driving motor 15 drives the first screw 13 to rotate so as to drive the first slider 14 to move.

The second linear guide rail group comprises a second guide rail 16 and a second sliding block 17, the second guide rail 16 is longitudinally fixed on the top surface of the workbench 1, the second sliding block 17 is arranged on the second guide rail 16 and can longitudinally slide along the second guide rail 16, and the head 3 of the deflection instrument is fixed on the top of the second sliding block 17.

The third linear guide rail group comprises a third guide rail 18, a third screw rod 19 and a third sliding block 20, the third guide rail 18 is longitudinally fixed on the top surface of the workbench 1, the third sliding block 20 is arranged on the third guide rail 18 and can longitudinally slide along the third guide rail 18, one end of the third screw rod 19 is fixedly connected with a hand wheel 21, and the other end of the third screw rod is arranged in the third sliding block 20 in a penetrating manner and can drive the third sliding block 20 to longitudinally move along the third guide rail 18. In this embodiment, the third sliding block 20 is provided with an inner hole, a threaded sleeve is arranged in the inner hole, the third screw rod 19 is arranged in the threaded sleeve in a penetrating manner, the third screw rod 19 is rotated by rotating the hand wheel 21, and the third sliding block 20 is displaced by the displacement of the threaded sleeve on the third screw rod 19.

The notch of the V-shaped groove I of the deflection instrument machine tail 2 is provided with a wheel set I22, and the notch of the V-shaped groove II of the deflection instrument machine head 3 is provided with a wheel set II 23. In this embodiment, the first wheel set 22 includes a first roller 25 and a second roller 26, the second wheel set 23 includes a third roller 27 and a fourth roller 28, the first roller 25 and the second roller 26 are fixed on the notch of the first V-shaped groove in an axially fixed circumferential rotation manner through a mandrel, and the third roller 27 and the fourth roller 28 are fixed on the side of the second V-shaped groove of the yaw instrument head 3 in an axially fixed circumferential rotation manner through the mandrel.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although 1, a table is used more herein; 2. a yaw instrument tail; 3. a yaw instrument head; 4. an instrument holder; 5. a micrometer; 6. a body; 7. a measuring rod; 8. a measuring head; 9. measuring an arc plate; 10. measuring the roller; 11. a holder; 12. a first guide rail; 13. a first screw rod; 14. a first sliding block; 15. a drive motor; 16. a second guide rail; 17. a second sliding block; 18. a third guide rail; 19. a third screw; 20. a third sliding block; 21. a hand wheel; 22. a first wheel set; 23. a second wheel set; 24. a support rod; 25. a first roller; 26. a second roller; 27. A third roller; 28. roller four, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. An eccentric shaft measuring instrument comprises a workbench (1), and is characterized in that one end of the top surface of the workbench (1) is vertically provided with a first linear guide rail set, the top surface of the workbench (1) is longitudinally provided with a second linear guide rail set and a third linear guide rail set, the first linear guide rail set is provided with a first deflection instrument tail (2), the top end of the first deflection instrument tail (2) is provided with a first V-shaped groove, the first deflection instrument tail (2) can lift along the first linear guide rail set, the second linear guide rail set is provided with a second deflection instrument head (3), the top end of the second deflection instrument head (3) is provided with a second V-shaped groove, the second deflection instrument head (3) can longitudinally move along the second linear guide rail set, the third guide rail set is provided with an instrument support (4), the instrument support (4) can longitudinally move along the third guide rail set, a micrometer (5) is fixed on the instrument support (4), and the micrometer (5) comprises an instrument body (6) and a measuring rod (7), the end connection of measuring stick (7) is fixed with measuring head (8), measuring head (8) including measuring arc board (9), a plurality of measuring roller (10) and holder (11), the arc mouth of measuring arc board (9) is down, the end fixing of the extrados of measuring arc board (9) and measuring stick (7), a plurality of measuring roller (10) distribute along the intrados of measuring the board through holder (11), a plurality of measuring roller (10) are fixed with holder (11) with axial fixity circumferential direction's mode.

2. The eccentric shaft measuring instrument according to claim 1, wherein the linear guide rail set comprises a first guide rail (12), a first screw rod (13) and a first sliding block (14), the bottom end of the first guide rail (12) is vertically fixed with one end of the top surface of the workbench (1), the first sliding block (14) is arranged on the first guide rail (12) and can lift along the first guide rail (12), the top end of the first guide rail (12) is fixedly provided with a driving motor (15), the top end of the first screw rod (13) is connected with an output shaft of the driving motor (15), the other end of the first screw rod penetrates through the first sliding block (14) and can drive the first sliding block (14) to lift, and the yaw meter tail (2) is fixed with the first sliding block (14).

3. The eccentric shaft measuring instrument according to claim 1, wherein the linear guide rail set comprises a second guide rail (16) and a second sliding block (17), the second guide rail (16) is longitudinally fixed on the top surface of the worktable (1), the second sliding block (17) is arranged on the second guide rail (16) and can longitudinally slide along the second guide rail (16), and the yaw rate measuring instrument head (3) is fixed on the top of the second sliding block (17).

4. The eccentric shaft measuring instrument according to claim 1, wherein the linear guide rail set III comprises a guide rail III (18), a screw rod III (19) and a slide block III (20), the guide rail III (18) is longitudinally fixed on the top surface of the working platform (1), the slide block III (20) is arranged on the guide rail III (18) and can longitudinally slide along the guide rail III (18), one end of the screw rod III (19) is fixedly connected with a hand wheel (21), and the other end of the screw rod III (19) penetrates through the slide block III (20) and can drive the slide block III (20) to longitudinally move along the guide rail III (18).

5. The eccentric shaft measuring instrument according to claim 1, wherein the notch of the V-shaped groove I of the yaw rate instrument tail (2) is provided with a wheel set I (22), and the notch of the V-shaped groove II of the yaw rate instrument head (3) is provided with a wheel set II (23).