阅读说明：本技术 一种精密电力零部件检测用长度测量设备 (Length measuring equipment for detecting precise electric power parts ) 是由 韩伟 于 2021-10-13 设计创作，主要内容包括：本发明涉及长度测量设备技术领域,提出了一种精密电力零部件检测用长度测量设备,其测量过程较为简单,可操作性较强,测量效率较高,能够适用于大批量的测量,可行性较好,能够适用于多种尺寸的精密电力零部件,适用性较强,调节较为容易,实用性较好,包括检测台、两个前探出耳和两个后探出耳,两个前探出耳均连接在检测台的前端,两个后探出耳均连接在检测台的后端,两个前探出耳之间连接有前阶梯辊,两个后探出耳之间连接有后阶梯辊,前阶梯辊和后阶梯辊之间连接有放置带,放置带内设置有多个定位推杆,检测台安装有用于后阶梯辊驱动的驱动电机,驱动电机连接有脚踏板,检测台内连接有两个滑动块,两个滑动块上均开设有圆孔。(The invention relates to the technical field of length measuring equipment, and provides length measuring equipment for detecting precise electric parts, which has the advantages of simple measuring process, stronger operability, higher measuring efficiency, suitability for large-batch measurement, better feasibility, suitability for precise electric parts of various sizes, stronger applicability, easier adjustment and better practicability, and comprises a detecting platform, two front detecting lugs and two rear detecting lugs, wherein the two front detecting lugs are connected with the front end of the detecting platform, the two rear detecting lugs are connected with the rear end of the detecting platform, a front step roller is connected between the two front detecting lugs, a rear step roller is connected between the two rear detecting lugs, a placing belt is connected between the front step roller and the rear step roller, a plurality of positioning push rods are arranged in the placing belt, the detecting platform is provided with a driving motor for driving the rear step roller, and the driving motor is connected with a pedal plate, examine test table in-connection and have two sliding blocks, all seted up the round hole on two sliding blocks.)

1. The length measuring equipment for detecting the precise electric power parts comprises a detection table (1) and is characterized by further comprising two front projection lugs (2) and two rear projection lugs (3), wherein the two front projection lugs (2) are fixedly connected to the front end of the detection table (1), the two rear projection lugs (3) are fixedly connected to the rear end of the detection table (1), a front step roller is rotatably connected between the two front projection lugs (2), a rear step roller is rotatably connected between the two rear projection lugs (3), a placing belt (4) is in transmission connection between the front step roller and the rear step roller, a plurality of mounting holes (29) are formed in the placing belt (4), a plurality of positioning push rods are arranged in the mounting holes (29), a driving motor for driving the rear step roller is installed at the left end of the detection table (1), and the driving motor is electrically connected with a pedal plate, the top end of the detection table (1) is provided with a sliding groove, the sliding groove is connected with two sliding blocks (5) in a sliding manner, the two sliding blocks (5) are symmetrically arranged, the two sliding blocks (5) are respectively provided with a round hole, an outer adjusting component is arranged between one sliding block (5) which is close to the right side of the two sliding blocks (5) and the detection table (1), a linkage component is arranged between the two sliding blocks (5), the linkage component is arranged in the detection table (1), the two sliding blocks (5) are respectively and fixedly connected with a mounting frame (6), the two mounting frames (6) are respectively provided with a T-shaped groove, the two T-shaped grooves are respectively and slidably matched with a T-shaped block (7), the bottom ends of the two T-shaped blocks (7) are respectively and rotatably connected with a measuring wheel (8), the T-shaped blocks (7) are respectively and fixedly connected with a fine adjusting spring (9), and the fine adjusting spring (9) is fixedly connected in the T-shaped groove, the detection table (1) is fixedly connected with a portal frame (10), the mounting frame (6) is in sliding fit with the portal frame (10), and the portal frame (10) is provided with a grating assembly connected with the T-shaped block (7).

2. The length measuring device for detecting the precise electric power part as claimed in claim 1, wherein the grating assembly comprises an intelligent display screen and two grating rulers, the intelligent display screen is installed at the front end of the portal frame (10), the two grating rulers are symmetrically installed in the portal frame (10), a driving coil (11) is slidably fitted at the moving measuring end of each grating ruler, the driving coil (11) is connected to the T-shaped block (7) through a plurality of bolts, and the two grating rulers are both electrically connected with the intelligent display screen through flexible wires.

3. The precision electric power part detection length measuring device according to claim 2, wherein the external adjusting assembly comprises a polished rod (12) and a threaded hole block (13), two sliding blocks (5) are provided with round holes, the polished rod (12) is rotatably connected into a round hole in one sliding block (5) close to the right side of the two sliding blocks (5) through a bearing, the left end of the polished rod (12) is fixedly connected with a threaded rod (14), the threaded hole block (13) is fixedly connected into the detection table (1), and the threaded rod (14) is in threaded connection with the threaded hole block (13).

4. The precision electric power part detection length measuring device according to claim 3, wherein the linkage assembly comprises an upper rack (15) and a lower rack (16), the upper rack (15) and the lower rack (16) are both connected in the detection table (1) in a sliding mode, the upper rack (15) and the lower rack (16) are respectively and fixedly connected to the bottom ends of the two sliding blocks (5), a transmission gear (17) is meshed between the upper rack (15) and the lower rack (16), and the transmission gear (17) is rotatably connected in the detection table (1).

5. The precision electric power component detection length measuring device according to claim 4, wherein the positioning push rod comprises a bottom plate (18), a penetrating rod (19) is fixedly connected to the bottom plate (18), the penetrating rod (19) penetrates through the mounting opening (29), a positioning cylinder (20) is slidably connected to the penetrating rod (19), a tension spring (21) is fixedly connected between the positioning cylinder (20) and the penetrating rod (19), and a plurality of limiting openings (22) for positioning the positioning cylinder (20) are formed in the mounting opening (29).

6. The length measuring device for detecting the precise electric power part as claimed in claim 5, wherein the front step roller and the rear step roller respectively comprise a front rotating shaft (23) and a rear rotating shaft (24), the front rotating shaft (23) is rotatably connected between the two front protruding lugs (2), the rear rotating shaft (24) is rotatably connected between the two rear protruding lugs (3), the front rotating shaft (23) and the rear rotating shaft (24) are both symmetrically and fixedly connected with two supporting rollers (25), and the left end of the rear rotating shaft (24) passes through one rear protruding lug (3) close to the left side of the two rear protruding lugs (3) and is connected with the output end of the driving motor.

7. The precision electric component detection length measuring device according to claim 6, wherein a contact ring (26) is rotatably connected to a side wall of the positioning cylinder (20).

8. The precision length measuring device for detecting the electric power parts as claimed in claim 7, wherein the front and rear sides of the detecting table (1) are recessed gradually from top to bottom, and the detecting table (1) is provided with a positioning opening.

9. The length measuring device for detecting precise electric power parts as claimed in claim 8, wherein a driving plate (27) is mounted at the right end of the polish rod (12), and a rotating hand lever is rotatably connected to the driving plate (27).

10. The precision electric component detection length measuring device according to claim 9, wherein the gantry (10) is connected with a thread pressing frame (28) through screws.

Technical Field

The invention relates to the technical field of length measuring equipment, in particular to length measuring equipment for detecting precise electric power parts.

Background

As is known, after the precision electric power parts are machined, verification measurement is usually required to be performed to check the machining precision of the precision electric power parts, reject unqualified products, and ensure the qualification rate of the precision electric power parts.

The existing measuring tool for the precise electric power parts is common general equipment such as a vernier caliper or a three-coordinate measuring instrument, when the measuring tool is used, a suitable detection table is selected at first, then the precise electric power parts needing to be measured are placed on the detection table, and the measurement of the precise electric power parts is realized through the vernier caliper or the three-coordinate measuring instrument.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the length measuring equipment for detecting the precise electric power parts, which has the advantages of simple measuring process, stronger operability, higher measuring efficiency, better feasibility, higher practicability, stronger applicability, easier adjustment and better practicability, and can be suitable for the precise electric power parts with various sizes.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a length measuring device for detecting precise electric power parts comprises a detection table, two front projection lugs and two rear projection lugs, wherein the two front projection lugs are fixedly connected to the front end of the detection table, the two rear projection lugs are fixedly connected to the rear end of the detection table, a front step roller is rotatably connected between the two front projection lugs, a rear step roller is rotatably connected between the two rear projection lugs, a placing belt is connected between the front step roller and the rear step roller in a transmission manner, a plurality of mounting ports are formed in the placing belt, a plurality of positioning push rods are arranged in the mounting ports, a driving motor for driving the rear step roller is installed at the left end of the detection table, the driving motor is electrically connected with a pedal plate, a sliding groove is formed in the top end of the detection table, two sliding blocks are slidably connected in the sliding groove, and are symmetrically arranged between the two sliding blocks, all seted up the round hole on two sliding blocks, two be close to a sliding block on right side in the sliding block and examine and install outer adjusting part between the platform, be provided with the linkage subassembly between two sliding blocks, the linkage unit mount is in examine in the platform, equal fixedly connected with mounting bracket on two sliding blocks, two T type groove has all been seted up on the mounting bracket, two equal sliding fit has T type piece, two in the T type inslot the bottom of T type piece is all rotated and is connected with the measuring wheel, fixedly connected with fine setting spring on the T type piece, fine setting spring fixed connection is in T type inslot, examines fixedly connected with portal frame on the platform, mounting bracket sliding fit is in the portal frame, install on the portal frame with the grating subassembly that T type piece is connected.

On the basis of the scheme, the grating assembly comprises an intelligent display screen and two grating rulers, the intelligent display screen is installed at the front end of the portal frame, the two grating rulers are symmetrically installed in the portal frame, the movable measuring end of each grating ruler is in sliding fit with a driving ring, the driving rings are connected onto the T-shaped block through a plurality of bolts, and the two grating rulers are electrically connected with the intelligent display screen through flexible electric wires.

Preferably on the basis of the scheme, the outer adjusting assembly comprises a polished rod and a threaded hole block, two round holes are formed in the sliding blocks, the polished rod is connected into the round hole in one sliding block close to the right side in the two sliding blocks in a rotating mode through a bearing, a threaded rod is fixedly connected to the left end of the polished rod, the threaded hole block is fixedly connected into the detection table, and the threaded rod is in threaded connection with the threaded hole block.

Further on the basis of the scheme, the linkage assembly comprises an upper rack and a lower rack, the upper rack and the lower rack are connected in the detection platform in a sliding mode, the upper rack and the lower rack are respectively and fixedly connected to the bottom ends of the two sliding blocks, a transmission gear is meshed between the upper rack and the lower rack, and the transmission gear is rotatably connected in the detection platform.

Still further on the basis of aforementioned scheme, the location push rod includes the bottom plate, fixedly connected with passes the pole on the bottom plate, pass the pole and pass the installing port, pass sliding connection has a location section of thick bamboo on the pole, a location section of thick bamboo and pass fixedly connected with extension spring between the pole, set up a plurality of spacing mouths that are used for a location section of thick bamboo location in the installing port.

On the basis of the scheme, the front step roller and the rear step roller respectively comprise a front rotating shaft and a rear rotating shaft, the front rotating shaft is rotatably connected between the two front extending lugs, the rear rotating shaft is rotatably connected between the two rear extending lugs, the front rotating shaft and the rear rotating shaft are symmetrically and fixedly connected with two supporting rollers, and the left end of the rear rotating shaft penetrates through one rear extending lug close to the left side of the two rear extending lugs and is connected with the output end of the driving motor.

As a further aspect of the above solution, a contact ring is rotatably connected to the sidewall of the positioning cylinder.

Still further as above-mentioned scheme, the front and back both sides of examining test table are all sunken gradually from top to bottom, examine and have seted up the location mouth on the test table.

As a further improvement of the above scheme, a driving disk is mounted at the right end of the polish rod, and a rotating hand lever is rotatably connected to the driving disk.

As a further scheme of the scheme, the portal frame is connected with a wire pressing frame through a screw.

(III) advantageous effects

Compared with the prior art, the invention provides length measuring equipment for detecting precise electric power parts, which has the following beneficial effects:

1. according to the invention, the length of the precise electric power part can be measured by matching the measuring wheel with the grating assembly, the measuring operation is simple, the measured data is accurate, and the operability is strong.

2. According to the invention, through the design of the placing belt, the sequential placing of a plurality of precise electric power parts can be realized, so that the plurality of precise electric power parts can form a detection assembly line, the measurement efficiency is higher, the detection assembly line can be suitable for large-batch measurement, the feasibility is better, through the design of the positioning push rod, the precise electric power parts placed on the placing belt can be pushed, meanwhile, the adjustment can be carried out according to the precise electric power parts with different sizes, and the practicability is better.

3. According to the invention, through the design of the external adjusting component, the motion of the two sliding blocks can be realized by operating the external adjusting component, so that the position of the mounting frame can be adjusted, the measuring wheels can be adjusted conveniently, through the design of the linkage component, the synchronous adjustment of the two measuring wheels can be realized by adjusting the external adjusting component, the device can be suitable for precise electric parts with various sizes, and has the advantages of strong applicability, easy adjustment and good practicability.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1A;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B according to the present invention;

FIG. 4 is an enlarged partial view of FIG. 1 at C;

FIG. 5 is an enlarged view of a portion of FIG. 1 at D according to the present invention;

FIG. 6 is a schematic view of a three-dimensional structure of the present invention showing the cooperation of the detecting table, the front projecting ear and the rear projecting ear;

FIG. 7 is a schematic exploded perspective view of the base plate, the pass through rod and the positioning barrel of the present invention;

FIG. 8 is a schematic exploded perspective view of a grating ruler, a gantry, a wire pressing frame, and other components of the present invention;

FIG. 9 is a schematic exploded perspective view of the combination of the polish rod, threaded bore block and threaded rod of the present invention;

FIG. 10 is a schematic perspective view of the upper rack, the lower rack and the transmission gear of the present invention;

fig. 11 is a schematic perspective view of the driving ring of the present invention.

In the figure: 1. a detection table; 2. the front is extended out of the ear; 3. the ear is extended out; 4. placing the belt; 5. a slider; 6. a mounting frame; 7. a T-shaped block; 8. a measuring wheel; 9. finely adjusting the spring; 10. a gantry; 11. a drive coil; 12. a polish rod; 13. a threaded hole block; 14. a threaded rod; 15. an upper rack; 16. a lower rack; 17. a transmission gear; 18. a base plate; 19. passing through the rod; 20. a positioning cylinder; 21. a tension spring; 22. a limiting port; 23. a front rotary shaft; 24. a rear rotating shaft; 25. a jack-up roller; 26. a contact ring; 27. a drive disc; 28. a wire pressing frame; 29. and (7) installing the opening.

Detailed Description

Examples

Referring to fig. 1-11, a length measuring device for detecting precise electric power components comprises a detecting table 1, two front protruding lugs 2 and two rear protruding lugs 3, wherein the front and rear sides of the detecting table 1 are recessed gradually from top to bottom to facilitate the placement of legs and feet during the working process of an operator, a limiting opening 22 is formed in the detecting table 1 to fix the detecting table 1 to an installation site, the two front protruding lugs 2 are fixedly connected to the front end of the detecting table 1, the two rear protruding lugs 3 are fixedly connected to the rear end of the detecting table 1, a front step roller is rotatably connected between the two front protruding lugs 2, a rear step roller is rotatably connected between the two rear protruding lugs 3, a placing belt 4 is rotatably connected between the front step roller and the rear step roller, the sequential placement of a plurality of precise electric power components can be realized, and therefore the plurality of precise electric power components can form a detection assembly line, the measuring efficiency is high, the measuring device can be suitable for large-batch measurement, the feasibility is good, the front step roller and the rear step roller respectively comprise a front rotating shaft 23 and a rear rotating shaft 24, the front rotating shaft 23 is rotatably connected between the two front protruding lugs 2, the rear rotating shaft 24 is rotatably connected between the two rear protruding lugs 3, the front rotating shaft 23 and the rear rotating shaft 24 are symmetrically and fixedly connected with two supporting rollers 25 respectively, a passing space is reserved for the bottom plate 18 arranged on the placing belt 4 to pass through, the left end of the rear rotating shaft 24 passes through one rear protruding lug 3 close to the left side of the two rear protruding lugs 3 and is connected with the output end of a driving motor to provide rotating power for the rear rotating shaft 24, the placing belt 4 is provided with a plurality of mounting ports 29, a plurality of positioning push rods are arranged in the plurality of mounting ports 29, each positioning push rod comprises the bottom plate 18, the bottom plate 18 is fixedly connected with a penetrating rod 19, the penetrating rod 19 penetrates through the mounting ports 29, the through rod 19 is connected with a positioning cylinder 20 in a sliding manner, a tension spring 21 is fixedly connected between the positioning cylinder 20 and the through rod 19, a plurality of limiting openings 22 for positioning the positioning cylinder 20 are formed in the mounting opening 29, the precise electric parts placed on the placing belt 4 can be pushed, and meanwhile can be adjusted according to the precise electric parts with different sizes, the mounting opening has good practicability, the side wall of the positioning cylinder 20 is connected with a contact ring 26 in a rotating manner, when the contact ring 26 pushes the precise electric parts to move between the two measuring wheels 8, as the precise electric parts are inevitably provided with centering errors in the process of placing the belt 4, after the precise electric parts are contacted with the two measuring wheels 8, the two measuring wheels 8 push the precise electric parts to a centering position, and the contact ring 26 can convert the sliding friction force of the precise electric parts relative to the contact ring 26 in the process of adjusting and displacing into the friction force between the contact ring 26 and the positioning cylinder 20, thereby facilitating fine adjustment of the position of the precision electric component during measurement between the two measuring wheels 8, and converting the frictional force of the relative movement between the precision electric component and the positioning cylinder 20 into the frictional force between the contact ring 26 and the positioning cylinder 20.

It should be further explained that the left end of the detection table 1 is provided with a driving motor for driving the rear step roller, the driving motor is electrically connected with a pedal, the top end of the detection table 1 is provided with a sliding groove, the sliding groove is connected with two sliding blocks 5 in a sliding manner, the two sliding blocks 5 are symmetrically arranged, the two sliding blocks 5 are both provided with round holes, an outer adjusting component is arranged between one sliding block 5 of the two sliding blocks 5 close to the right side and the detection table 1, the outer adjusting component comprises a polished rod 12 and a threaded hole block 13, the two sliding blocks 5 are both provided with round holes, the polished rod 12 is rotatably connected in the round hole of one sliding block 5 of the two sliding blocks 5 close to the right side through a bearing, the left end of the polished rod 12 is fixedly connected with a threaded rod 14, the threaded hole block 13 is fixedly connected in the detection table 1, the threaded rod 14 is in threaded connection with the threaded hole block 13, and the movement of the two sliding blocks 5 can be realized through operating the outer component, thereby realizing the adjustment of the position of the mounting frame 6 and further facilitating the adjustment of the measuring wheel 8, the right end of the polished rod 12 is provided with the driving disk 27, the driving disk 27 is rotatably connected with a rotating hand lever, a linkage component is arranged between the two sliding blocks 5, the rotating arm of the polished rod 12 is improved by the lever principle, so that the rotating operation of the polished rod 12 is easier and more practical, the linkage component is arranged in the detection table 1 and comprises an upper rack 15 and a lower rack 16, the upper rack 15 and the lower rack 16 are both slidably connected in the detection table 1, the upper rack 15 and the lower rack 16 are respectively and fixedly connected with the bottom ends of the two sliding blocks 5, a transmission gear 17 is meshed between the upper rack 15 and the lower rack 16, the transmission gear 17 is rotatably connected in the detection table 1, so that the adjusting external adjusting component can realize the synchronous adjustment of the two measuring wheels 8, and can be suitable for precise electric parts with various sizes, the applicability is stronger, and it is easier to adjust, and the practicality is better.

Still further, the two sliding blocks 5 are fixedly connected with the mounting frames 6, the two mounting frames 6 are respectively provided with a T-shaped groove, the T-shaped grooves are respectively matched with the T-shaped blocks 7 in a sliding manner, the bottom ends of the two T-shaped blocks 7 are respectively connected with the measuring wheel 8 in a rotating manner, the length of the precise electric power component can be measured by matching the measuring wheel 8 with the grating assembly, the measuring operation is simple, the measured data is accurate, the operability is strong, the T-shaped blocks 7 are fixedly connected with the fine tuning springs 9, the fine tuning springs 9 are fixedly connected in the T-shaped grooves, the detection table 1 is fixedly connected with the portal frame 10, the mounting frames 6 are matched in the portal frame 10 in a sliding manner, the grating assembly connected with the T-shaped blocks 7 is installed on the portal frame 10, the grating assembly comprises an intelligent display screen and two grating rulers, the intelligent display screen is installed at the front end of the portal frame 10, the two grating rulers are symmetrically installed in the portal frame 10, the movable measuring end of each grating ruler is in sliding fit with a driving ring 11, the driving rings 11 are connected to the T-shaped block 7 through a plurality of bolts, the two grating rulers are electrically connected with the intelligent display screen through flexible wires, measured data are accurate, operability is high, the portal frame 10 is connected with a wire pressing frame 28 through bolts, and positioning of the flexible wires on the portal frame 10 is achieved.

To sum up, before the length measuring device for detecting the precise electric power parts is used, the length measuring device for detecting the precise electric power parts is firstly placed at a place needing to be used, the fixing of the detection table 1 at the use place can be realized through the positioning port if necessary, in the fixing process of the use place through the positioning port, firstly, an expansion bolt groove needs to be drilled at an installation place according to the size of the positioning port, then, a proper expansion bolt is selected, the expansion bolt penetrates through the positioning port and is inserted into the expansion bolt groove, the fixing of the detection table 1 is realized by rotating a bolt cap on the expansion bolt, and as the grating ruler, the driving motor and the intelligent display screen are all devices which are mature in the market and are well known by professionals in the field, and meanwhile, the structure of the device is not improved and is only applied simply, the grating ruler, the structure of the device, the method and the device for detecting the precise electric power parts are used in the invention, The driving motor and the intelligent display screen can be selected according to the use requirement or customized according to the original factory, so that the installation is only needed to be completed according to the specification and the intelligent display screen is electrically connected with an external power supply, in the use process, the grating ruler, the driving motor and the intelligent display screen are firstly started, the driving disc 27 is rotated according to the precise electric power part to be measured, the position of one sliding block 5 of the two sliding blocks 5, which is provided with the polished rod 12, is adjusted relative to the detection table 1 by rotating the driving disc 27, meanwhile, the sliding block 5 realizes the adjustment of the other sliding block 5 relative to the detection table 1 by the matching of the upper rack 15, the transmission gear 17 and the lower rack 16, the adjustment of the relative distance between the two measuring wheels 8 is realized by the adjustment of the relative distance between the two sliding blocks 5, and the distance between the two measuring wheels 8 is slightly smaller than the precise electric power part to be detected, after the adjustment is completed, the positioning cylinder 20 is lifted up until the positioning cylinder 20 completely exits from one limiting opening 22 where the positioning cylinder 20 is located, then the positioning cylinder 20 is pulled and the penetrating rod 19 moves to one limiting opening 22 in the plurality of limiting openings 22 in the mounting opening 29 when the positioning cylinder 20 is pulled, until the positioning cylinder 20 moves to the position right above the limiting opening 22, the positioning cylinder 20 is released, the tension effect borne by the tension spring 21 is invalid, the positioning cylinder 20 is inserted into the limiting opening 22 to which the positioning cylinder needs to move under the tension effect of the deformation recovery of the tension spring 21, the adjustment of the positioning cylinder 20 in the mounting opening 29 is completed, the precise electric power component to be measured is manually placed on the placing belt 4 after the adjustment is completed, and the front end of the precise electric power component is close to the corresponding contact ring 26, the driving motor works to move the placing belt 4, the placing belt 4 realizes the pushing of precise electric parts placed on the placing belt 4 through the positioning push rod, along with the movement of the placing belt 4, a plurality of precise electric parts are sequentially placed on the placing belt according to the mode, thereby forming the assembly line type detection of the precise electric parts, in the detection process, the precise electric parts move through the position between the two measuring wheels 8 along with the placing belt 4, simultaneously, the two measuring wheels 8 are pushed away from each other in the process that the precise electric parts pass through the two measuring wheels 8, the measuring wheels 8 move to drive the grating ruler to move, the detection of the precise electric parts is realized, the detected data can be displayed on the intelligent display screen, when the detected data deviate, the foot pedal is stepped to realize the sudden stop of the driving motor, the precise electric parts corresponding to the deviation of the detected data on the placing belt 4 are taken down for rechecking, when the precise electric parts with different sizes need to be detected, firstly, the size between the two measuring wheels 8 is roughly adjusted according to the sizes of the precise electric parts with different sizes, and the detection is completed according to the steps after the adjustment is completed.