Appearance defect detection device for gradienter production

Abstract

The invention discloses an appearance imperfect detection device for gradienter production, the appearance imperfect detection device comprises a base and a detection workbench, a swing connection part is arranged between the detection workbench and the base, the detection workbench comprises an inner disc part and a tabletop part, the tabletop part is overlapped on the upper side of the inner disc part, and the swing connection part is arranged on the inner disc part. The table top part and the inner disc part are oppositely arranged, a rotary connecting part is arranged between the table top part and the inner disc part, a plurality of air holes penetrating up and down are formed in the table top part, an air channel with an upward opening is formed in the inner disc part, the air channel is communicated with part of the air holes, and a plurality of pressure detectors are arranged on the table top part. The air holes and the air channels in different areas are communicated in a staggered mode, negative pressure exists in the air channels, so that the working face of the gradienter is attracted to be tightly attached to the tabletop portion at different angles and different areas, if the working face of the gradienter has flaws of protrusions, the gradienter vibrates, a pressure detector detects vibration, manual touch detection is not needed, the detection effect is better, and efficiency is higher.

Description

Technical Field

[0001] The invention relates to the field related to laser level instruments, and in particular to an appearance defect detection device for producing level instruments. Background Art

[0002] Existing laser levels need to be tested before leaving the factory. The inspection contents include appearance inspection, function inspection, accuracy inspection, etc. The appearance inspection includes the inspection of the working surface and the non-working surface. The working surface needs to be flat, free of burrs and scratches. The non-working surface is manually judged by appearance. In the function inspection, it is necessary to determine whether the laser level will alarm at the extreme working inclination angle.

[0003] The working surface of the level is important as a positioning surface, but manual inspection cannot eliminate the possibility of tiny protrusions. The stability inspection of the working surface adopts traditional manual touch inspection, which has poor effect and low efficiency.

[0004] In addition, the functional test of whether the level will issue an alarm when it is at an extreme inclination angle is still carried out manually, and the extreme inclination angle cannot be quantified; and the laser accuracy test of the level is carried out on a random basis in a horizontal state, and no accuracy test is performed on the level in a tilted state. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art that the manual detection of the working surface of the level meter is poor and the laser accuracy is not detected in a tilted state.

[0006] In order to solve the above technical problems, the present invention provides an appearance defect detection device for level meter production.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a device for detecting appearance defects for producing a level meter, which includes a base and a detection workbench, a swing connection part is arranged between the detection workbench and the base, the detection workbench includes an inner disk part and a table part, the table part is overlapped on the upper side of the inner disk part, and a rotating connection part is arranged between the table part and the inner disk part, a plurality of air holes penetrating up and down are opened on the table part, the inner disk part is opened with an air passage opening upward, the air passage is connected with some of the air holes, and a plurality of pressure detectors are arranged on the table part.

[0008] In this scheme, when testing the level, the level is placed on the testing workbench so that the working surface of the level contacts the table portion, the swing connection portion adjusts the angle between the testing workbench and the base, and the rotating connection portion drives the table portion to rotate relative to the inner disk portion and the level, so that the level is at different horizontal angles. In this process, it is possible to detect whether the alarm angle of the level is qualified, and it is also possible to detect whether the self-balancing ability of the level within the specified angle is qualified; at the same time, due to the relative rotation of the inner disk portion and the table portion, the air holes and airways in different areas are interconnected, and there is negative pressure in the airways, thereby attracting the working surface of the level to be close to the table portion at different angles and in different areas. If there is a defect of protrusion on the working surface of the level, the level will vibrate, and the pressure detector detects the vibration. If it exceeds the set value, it is determined that the working surface of the level is unqualified. In this way, the working surface can be fully automatically and efficiently detected without manual touch inspection, and the detection effect is better and the efficiency is higher; and during the rotation of the level, the appearance of the level can be manually inspected for defective defects.

[0009] Preferably, the appearance defect detection device for level production also includes an accuracy detection unit, which includes a rotating ring, a plurality of detection brackets, a detection camera and a ruler. The rotating ring is arranged on the upper surface of the base and is rotatably connected to the base. The plurality of detection brackets are circumferentially distributed on the side of the rotating ring. The ruler is arranged on the detection bracket, and the detection camera is installed on the detection bracket.

[0010] Preferably, a synchronous connection portion is provided between the rotating ring and the table portion, so that the rotating ring and the table portion rotate synchronously.

[0011] Preferably, the synchronous connection part is a connecting rod, a longitudinal slide groove is provided on the inner side of the rotating ring, a sliding shaft is slidably provided in the longitudinal slide groove, the sliding shaft is rotatably connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the side surface of the table portion.

[0012] Preferably, the appearance defect detection device for level production also includes a control unit, the detection camera is electrically connected to the signal input end of the control unit, and the signal output end of the control unit is electrically connected to the swing connection part and the rotating connection part.

[0013] Preferably, the swing connection portion includes a support tube fixedly connected to the inner disk portion, the top of the support tube is connected to the airway, the bottom of the support tube is rotatably connected to the base, and a ventilation pipe is provided in the base, and the ventilation pipe is connected to the support tube.

[0014] Preferably, the base is provided with an air groove opening upward, the base is provided with the ventilation pipe, the ventilation pipe is connected with the air groove, the lower end of the support pipe is inserted into the air groove, the support pipe is rotatably connected with the inner wall of the air groove, and the gap between the support pipe and the air groove is filled with a rubber pad.

[0015] Preferably, the swing connection part also includes a driving rod, and the driving rod is arranged on the base. A sliding groove is provided on the lower surface of the inner disk part, and a slider is slidably provided in the sliding groove. The slider is hinged to the end of the driving rod.

[0016] Preferably, the rotating connection part also includes a rotating driving member, which includes a motor, a driving gear and an inner gear ring. The motor is installed on the lower surface of the inner disk part, the shaft of the motor is connected to the driving gear, the gear ring is fixed on the lower side of the table part, and the inner gear ring is meshed with the driving gear.

[0017] Preferably, the appearance defect detection device for level meter production also includes a negative pressure generator, and the negative pressure generator is connected to the air channel on the inner disk.

[0018] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0019] The positive and progressive effect of the present invention is that when testing the level meter, the level meter is placed on the testing workbench so that the working surface of the level meter contacts the table portion, the swing connection portion adjusts the angle between the testing workbench and the base, and the rotation connection portion drives the table portion to rotate relative to the inner disk portion and the level meter so that the level meter is at different horizontal angles. In this process, it can be tested whether the alarm angle of the level meter is qualified, and it can also be tested whether the self-balancing ability of the level meter within the specified angle is qualified; The inner disk and the table surface rotate relative to each other, and the air holes and air passages in different areas are interconnected. There is negative pressure in the air passages, which attracts the working surface of the level to stick close to the table surface at different angles and in different areas. If there are protrusions on the working surface of the level, the level will vibrate, and the pressure detector will detect the vibration. If it exceeds the set value, the working surface of the level is deemed unqualified. There is no need for manual touch inspection, and the inspection effect is better and the efficiency is higher. During the rotation of the level, the appearance of the non-working surface of the level can be manually inspected to see if there are any defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the present invention.

[0021] Figure 2 for Figure 1 Schematic diagram of the structure of the middle base and the detection workbench.

[0022] Figure 3 for Figure 2 Schematic diagram of the structure on the back of the inspection workbench.

[0023] Figure 4 for Figure 1 Top view.

[0024] Figure 5 for Figure 4 Cross-sectional view at AA in the middle.

[0025] Figure 6 for Figure 5 A magnified schematic diagram of point B in the middle.

[0026] Figure 7 for Figure 5 Schematic diagram of the structure at the middle drive rod.

[0027] Figure 8 for Figure 5 Schematic diagram of the structure of the motor.

[0028] Description of reference numerals: 10. Base; 11. Countertop; 12. Positioning surface; 13. Stomata; 14. Pressure detector; 15. Internal gear ring; 16. Inner plate; 17. Airway; 18. Support pipe; 19. Driving gear; 21. Ventilation pipe; 22. Detection bracket; 23. Ruler; 24. Detection camera; 25. Air tank; 26. Swing shaft; 27. Rubber pad; 28. Driving rod; 29. Chute; 30. Slider; 31. Motor; 32. Bearings; 35. Rotating ring; 36. Longitudinal slotting; 37. Longitudinal chute; 38. Sliding shaft; 39. Connecting rod. DETAILED DESCRIPTION

[0029] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0030] Figure 1-Figure 8 The present invention shows a defective appearance detection device for level meter production. Figure 1 and Figure 2 As shown, it includes a base 10 and a detection workbench, a swing connection portion is arranged between the detection workbench and the base 10, the detection workbench includes an inner disk portion 16 and a table portion 11, the table portion 11 is stacked on the upper side of the inner disk portion 16, and a rotating connection portion is arranged between the table portion 11 and the inner disk portion 16, a plurality of air holes 13 penetrating up and down are opened on the table portion 11, the inner disk portion 16 is opened with an air channel 17 opening upward, the air channel 17 is connected with part of the air holes 13, and a plurality of pressure detectors 14 are arranged on the table portion 11.

[0031] In this embodiment, when testing the spirit level, the spirit level is placed on the testing workbench, the upper surface of the table portion 11 is the positioning surface 12, the working surface at the bottom of the spirit level is in contact with the positioning surface 12, the swing connection portion adjusts the angle between the testing workbench and the base 10 so that the upper surface of the table portion 11 is at a set inclination angle, the rotating connection portion drives the table portion 11 to rotate, and the table portion 11 drives the spirit level to rotate.

[0032] When the level is tilted, the pendulum inside the level is affected by gravity and points to the vertical direction. The direction of gravity pointed by the pendulum and the normal of the working surface of the level form an angle. If this angle is within the set range, the level can work normally. If this angle exceeds the set range, an alarm will be triggered.

[0033] During factory inspection, it is necessary to determine whether the level will sound an alarm when the angle exceeds the set range. The existing judgment method is to manually tilt the level until the level sounds an alarm, but this method cannot quantify the extreme tilt angle when the level sounds an alarm. In this embodiment, the swing connection part can quantifiably adjust the inclination angle of the level until the level sounds an alarm, thereby detecting the extreme tilt angle of the level.

[0034] In addition, the laser accuracy of the level needs to be tested before it leaves the factory. The existing testing standard is to place the level on a horizontal plane and test the laser accuracy, but there is no test of the laser accuracy when the level is in a certain tilt angle. In this embodiment, the level can be set in a tilt angle state, and the pendulum is affected by gravity to maintain a vertical state. This ability to maintain a vertical state is called self-balancing ability. When the level is kept in a tilted state, the laser accuracy of the level can be tested to test the self-balancing ability of the level.

[0035] Finally, the factory inspection also includes the inspection of the working surface of the level. The existing inspection methods are manual inspection and visual inspection, which are too inefficient. It is impossible to quickly and effectively detect the situation where the working surface has protrusions, resulting in unstable positioning. In this embodiment, the inner disk 16 and the table portion 11 rotate relative to each other, and the air holes 13 and the air ducts 17 in different areas are staggered and connected. There is negative pressure in the air duct 17, so that the working surface of the level is attracted to press down against the table portion 11 at different angles and in different areas. If there are protrusions on the working surface of the level, the level will vibrate, and the pressure detector 14 detects the vibration. If the vibration exceeds the set value, the working surface of the level is deemed unqualified. The above-mentioned defect detection scheme for whether there are protrusions on the working surface is adopted, and there is no need for manual touch inspection, and the detection effect is better and the efficiency is higher. In addition, during the rotation of the level, the appearance of the non-working surface of the level can be manually inspected to see if there are defective defects.

[0036] like Figure 4 As shown, in a specific implementation, a plurality of air holes 13 are evenly arranged on the table portion 11, and the pressure detector 14 is a plurality of annular piezoelectric sheets with different diameters, and the upper surface of the piezoelectric sheet is flush with the upper surface of the table portion 11. Alternatively, the upper surface of the piezoelectric sheet is higher than the upper surface of the table portion 11.

[0037] like Figure 1 As shown, preferably, the appearance defect detection device for level production also includes an accuracy detection unit, and the accuracy detection unit includes a rotating ring 35, a plurality of detection brackets 22, a detection camera 24 and a ruler 23. The rotating ring 35 is arranged on the upper surface of the base 10 and is rotatably connected to the base 10. The plurality of detection brackets 22 are circumferentially distributed on the side of the rotating ring 35. The ruler 23 is arranged on the detection bracket 22, and the detection camera 24 is installed on the detection bracket 22.

[0038] In specific implementation, there are four detection brackets 22, which extend upward, and a scale 23 is vertically installed on the inner side of the detection bracket 22. A detection camera 24 is installed on the upper end of the detection bracket 22, and the detection camera 24 is aimed at the opposite scale 23. An activity space is formed between the inner ring of the rotating ring 35 and the outer side of the detection workbench to facilitate the swing of the detection workbench and avoid interference.

[0039] In this embodiment, the laser of the level is turned on and projected onto the scale 23. The detection camera 24 detects the position of the laser to determine the horizontality and verticality of the laser. The rotating ring 35 drives the detection bracket 22 to rotate, thereby adjusting the angle between the scale 23 and the laser.

[0040] Preferably, a synchronous connection portion is provided between the rotating ring 35 and the table portion 11 , so that the rotating ring 35 and the table portion 11 rotate synchronously.

[0041] The synchronous connection part can make the scale 23 and the laser of the level always maintain a relative position. As the level rotates, the level can monitor in real time whether the laser is qualified at different horizontal angles.

[0042] like Figure 6 As shown, in this embodiment, the synchronous connection part is a connecting rod 39, a longitudinal groove 36 is provided on the inner side of the rotating ring 35, a longitudinal slide groove 37 is provided on the side wall of the longitudinal groove 36, a sliding shaft 38 is provided in the longitudinal slide groove 37 for longitudinal sliding, the sliding shaft 38 is rotatably connected to one end of the connecting rod 39, and the other end of the connecting rod 39 is rotatably connected to the side surface of the table portion 11.

[0043] When the table portion 11 rotates, the rotating ring 35 is driven to rotate through the connecting rod 39 . The table portion 11 swings at a certain angle, and the connecting rod 39 swings accordingly, which does not affect the rotation of the rotating ring 35 .

[0044] In other embodiments, the synchronous connection part includes a motor, a ring gear and a gear. The outer side of the rotating ring 35 has a ring gear, the gear and the ring gear are meshed, the output shaft of the motor is coaxially connected to the gear, and the rotation speed of the motor output shaft is adapted to the rotating drive member in the rotating connection part, so that the table portion 11 and the rotating ring 35 rotate at the same speed, thereby achieving a synchronization effect through active drive.

[0045] Preferably, the appearance defect detection device for level meter production also includes a control unit, the detection camera 24 is electrically connected to the signal input end of the control unit, and the signal output end of the control unit is electrically connected to the swing connection part and the rotating connection part.

[0046] In this embodiment, the control unit determines whether the horizontality and verticality of the laser are qualified by judging the camera image, and adjusts the horizontal angle of the table portion 11 by controlling the swing connection part, thereby realizing the functions of automatic adjustment and automatic detection.

[0047] like Figure 5 As shown, preferably, the swing connection portion includes a support tube 18 fixedly connected to the inner disk portion 16, the top of the support tube 18 is connected to the air duct 17, the bottom of the support tube 18 is rotatably connected to the base 10, and a ventilation pipe 21 is provided in the base 10, and the ventilation pipe 21 is connected to the support tube 18.

[0048] In this embodiment, the support tube 18 swings relative to the base 10 , and the support tube 18 is also connected to the air passage 17 and the vent pipe 21 , so that the air hole 13 can realize the function of negative pressure adsorption.

[0049] like Figure 3 and Figure 5As shown, preferably, the base 10 is provided with an air groove 25 opening upward, the base 10 is provided with the ventilation pipe 21, the ventilation pipe 21 is connected with the air groove 25, the lower end of the support tube 18 is inserted into the air groove 25, the support tube 18 and the inner wall of the air groove 25 are rotatably connected by setting a swing shaft 26, and the gap between the support tube 18 and the air groove 25 is filled with a rubber pad 27.

[0050] In this embodiment, the support tube 18 swings in the gas groove 25, and the rubber pad 27 performs a sealing function to prevent gas from leaking out.

[0051] like Figure 7 Preferably, the swing connection part also includes a driving rod 28, and the driving rod 28 is arranged on the base 10. A sliding groove 29 is provided on the lower surface of the inner disk 16, and a slider 30 is slidably provided in the sliding groove 29. The slider 30 is hinged at the end of the driving rod 28.

[0052] In this embodiment, the driving rod 28 is extended and retracted to push the slider 30 to slide in the slide groove 29 , and the slider 30 swings up and down against the inner disk 16 to provide power for the swing of the inner disk 16 .

[0053] like Figure 8 As shown, preferably, the rotating connection part further includes a rotating driving member, which includes a motor 31, a driving gear 19 and an inner gear ring 15. The motor 31 is installed on the lower surface of the inner disk part 16, and the shaft of the motor 31 is connected to the driving gear 19. The inner gear ring 15 is fixed on the lower side of the table part 11, and the inner gear ring 15 is meshed with the driving gear 19. Figure 5 As shown, a bearing 32 is installed between the table portion 11 and the inner disk portion 16. Specifically, a mounting shaft protrudes from the lower surface of the table portion 11, and a bearing mounting groove is provided on the upper surface of the inner disk portion 16. The bearing 32 is embedded in the bearing mounting groove, and the mounting shaft extends into the inner ring of the bearing 32.

[0054] In this embodiment, the motor 31 on the inner disk portion 16 drives the driving gear 19 to rotate, the driving gear 19 drives the inner gear ring 15 to rotate, and the inner gear ring 15 drives the table portion 11 to rotate.

[0055] Preferably, the appearance defect detection device for level meter production further includes a negative pressure generator, and the negative pressure generator is connected to the air passage 17 on the inner disk 16 .

[0056] In this embodiment, the negative pressure generator provides negative pressure to the airway 17 .

[0057] In other embodiments, the appearance defect detection device for level production also includes a positive pressure generator, which is connected to the air channel 17 to provide positive pressure for the air hole 13, and can also destroy the stability to detect the flatness of the working surface of the level.

[0058] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A device for detecting appearance defects for level meter production, comprising a base and a detection workbench, characterized in that: A swing connection portion is arranged between the detection workbench and the base, the detection workbench comprises an inner disk portion and a table portion, the table portion is overlapped on the upper side of the inner disk portion, and a rotating connection portion is arranged between the table portion and the inner disk portion, a plurality of air holes penetrating up and down are arranged on the table portion, the inner disk portion is provided with an air passage opening upward, the air passage is connected with some of the air holes, and a plurality of pressure detectors are arranged on the table portion.

2. The appearance defect detection device for level meter production according to claim 1 is characterized in that: The appearance defect detection device for level instrument production also includes an accuracy detection unit, which includes a rotating ring, multiple detection brackets, a detection camera and a ruler. The rotating ring is arranged on the upper surface of the base and is rotatably connected to the base. The multiple detection brackets are circumferentially distributed on the side of the rotating ring. The ruler is arranged on the detection bracket, and the detection camera is installed on the detection bracket.

3. The appearance defect detection device for level meter production according to claim 2, characterized in that: A synchronous connection portion is provided between the rotating ring and the table portion, so that the rotating ring and the table portion rotate synchronously.

4. The appearance defect detection device for level meter production according to claim 3 is characterized in that: The synchronous connection part is a connecting rod, a longitudinal sliding groove is provided inside the rotating ring, a sliding shaft is slidably arranged in the longitudinal sliding groove, the sliding shaft is rotationally connected to one end of the connecting rod, and the other end of the connecting rod is rotationally connected to the side surface of the table portion.

5. The appearance defect detection device for level production according to claim 2, characterized in that: The appearance defect detection device for level meter production also includes a control unit, the detection camera is electrically connected to the signal input end of the control unit, and the signal output end of the control unit is electrically connected to the swing connection part and the rotating connection part.

6. The appearance defect detection device for level meter production according to claim 1, characterized in that: The swing connection part includes a support tube fixedly connected to the inner disk part, the top of the support tube is connected to the airway, the bottom of the support tube is rotatably connected to the base, and a ventilation pipe is arranged in the base, and the ventilation pipe is connected to the support tube.

7. The appearance defect detection device for level meter production according to claim 6, characterized in that: The base is provided with an air groove opening upward, the base is provided with the ventilation pipe, the ventilation pipe is connected with the air groove, the lower end of the support pipe is inserted into the air groove, the support pipe is rotatably connected with the inner wall of the air groove, and the gap between the support pipe and the air groove is filled with a rubber pad.

8. The appearance defect detection device for level meter production according to claim 1, characterized in that: The swing connection part also includes a driving rod, which is arranged on the base. A sliding groove is provided on the lower surface of the inner disk part. A sliding block is slidably arranged in the sliding groove. The end of the driving rod is hinged to the sliding block.

9. The appearance defect detection device for level meter production according to claim 1, characterized in that: The rotating connection part also includes a rotating driving member, which includes a motor, a driving gear and an inner gear ring. The motor is installed on the lower surface of the inner disk part, the shaft of the motor is connected to the driving gear, the gear ring is fixed on the lower side of the table part, and the inner gear ring is meshed with the driving gear.

10. The appearance defect detection device for level meter production according to claim 1, characterized in that: The appearance defect detection device for level meter production also includes a negative pressure generator, which is connected to the air channel on the inner disk.

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