A grinding machine and a case-based reasoning method for grinding machine fault diagnosis

Abstract

The application relates to a grinder and a grinder fault diagnosis method based on case reasoning, which comprises a body, a handle and a planetary gear box connected in sequence, a motor is installed on the top side of the planetary gear box, a plurality of mounting seats are installed on the planetary gear box, grinding discs are installed on the mounting seats, grinding pieces are installed on each grinding disc, a connecting frame is installed on the bottom side of the planetary gear box, a shielding frame is installed on the connecting frame, a pressing ring is fixedly installed on the peripheral side wall of the grinding disc, a first pressing strip is arranged on the inner wall of the connecting frame, a first screw rod is fixedly installed on the first pressing strip, a first screw hole is arranged on the peripheral side wall of the connecting frame and used for screw rod penetration, a first detection mechanism is installed on the end of the first screw rod away from the first pressing strip, the handle is provided with a control panel, the first detection mechanism is electrically connected with the control panel, and the control panel detects the rotation of the first screw rod through the first detection mechanism. The application has the effect of conveniently detecting the flatness of the grinding disc.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of grinding machines, in particular to a grinding machine and a grinding machine fault diagnosis method based on case-based reasoning. BACKGROUND

[0002] The grinding machine is a device for grinding the ground to keep the ground flat.

[0003] The existing grinding machine generally includes a machine body, a handle installed on one side of the machine body, and a planetary gear box installed on the side of the machine body away from the handle. The top side of the planetary gear box is installed with a motor, and the bottom side of the planetary gear box is installed with a plurality of mounting seats. The motor drives each mounting seat to rotate around the motor through the planetary gear box, and the motor also drives each mounting seat to revolve around the rotation axis of the motor through the planetary gear box. The side of the mounting seat away from the planetary gear box is installed with a grinding disc, and each grinding disc is installed with a grinding piece. The grinding piece is driven to grind the ground by the revolution and rotation of the mounting seat, so as to keep the ground flat. The handle is installed with a control panel, and the planetary gear box is installed with a vibration sensor. The control panel detects the vibration of the grinding machine through the vibration sensor, and an alarm is issued to remind the staff when the grinding machine vibration detected by the control panel is abnormal.

[0004] For the related technology in the above, the reasons causing the vibration of the grinding machine are various, such as uneven grinding disc, motor damage and gear wear inside the planetary gear box, etc. The staff needs to troubleshoot the grinding machine, find out the fault reason of the grinding machine and repair it. However, the uneven grinding disc needs to be removed from the machine body, and then the planetary gear box is inverted to measure each grinding disc, thereby increasing the difficulty of detecting the flatness of the grinding disc SUMMARY

[0005] In order to facilitate the detection of the flatness of the grinding disc, the present application provides a grinding machine and a grinding machine fault diagnosis method based on case-based reasoning.

[0006] The grinding machine and the grinding machine fault diagnosis method based on case-based reasoning provided by the present application adopt the following technical solutions:

[0007] The utility model provides a kind of grinder, including machine body, handle installed to one side of machine body and planetary gearbox installed to the side of machine body away from handle, motor is installed on the top side of the planetary gearbox, a plurality of mounting seat is installed on the bottom side of the planetary gearbox, abrasive disc is installed on the side of the mounting seat away from planetary gearbox, abrasive disc is installed with abrasive disc, connecting frame is fixedly installed on the side of the planetary gearbox away from motor along circumference, shielding frame is fixedly installed on the side of the connecting frame away from planetary gearbox, the peripheral sidewall of the abrasive disc is fixedly installed with compression ring, the inner wall of the connecting frame is provided with first pressing strip, first screw rod is fixedly installed on the first pressing strip, the first screw hole for first screw rod is set in the peripheral sidewall of the connecting frame, the first pressing strip is arranged along the circumference of connecting frame, the first pressing strip is gradually lifted and is arranged in inclination from one end to the other end, the low end of the first pressing strip is used to abut the top side of compression ring, first detection mechanism is installed on the end of the first screw rod away from first pressing strip, control panel is installed on the handle, the first detection mechanism is electrically connected with control panel, the control panel detects the rotation of first screw rod by first detection mechanism.

[0008] By adopting the above technical scheme, when the grinder is polishing the ground, the planetary gearbox drives the abrasive disc to revolve and rotate through the mounting seat. When the abrasive disc revolves, the abrasive disc drives the compression ring to enter the lower side of the first pressing strip from the high end of the first pressing strip. Then the abrasive disc revolves and drives the compression ring to move in the lower side of the first pressing strip, so that the high end of the first pressing strip moves to the low end. If the abrasive disc is not flat, through the rotation of the abrasive disc, the abrasive disc drives the side of the compression ring that is lifted to push the low end of the first pressing strip upward, so that the first pressing strip drives the first screw rod to rotate. The control panel detects the rotation of the first screw rod through the first detection mechanism, so as to detect that the abrasive disc is not flat, and then the flatness of the abrasive disc is detected conveniently. Then the abrasive disc revolves and drives the compression ring to move out from the lower side of the first pressing strip, and the first detection mechanism drives the screw rod to rotate and reset, so as to conveniently detect the flatness of another abrasive disc.

[0009] Optionally, the first detection mechanism includes a first mounting rod, a first cam and a first pressure sensor, the first pressure sensor is installed on the outer wall of the connecting frame, one end of the first mounting rod is connected with the end of the first screw rod away from the first pressing strip, the first cam is installed on the first mounting rod, the first pressure sensor is used for abutting after the first cam rotates, and the first pressure sensor is electrically connected with the control panel.

[0010] By adopting the technical scheme, when the uneven grinding disc drives the first screw rod to rotate, the first screw rod drives the first cam to rotate, thereby increasing the pressure of the first cam on the first pressure sensor. The first pressure sensor produces an electric signal according to the pressure received and sends the electric signal to the control panel. The control panel calculates the pressure of the first cam on the first pressure sensor according to the electric signal. When the pressure of the first cam on the first pressure sensor is greater than a preset pressure threshold, the grinding disc is uneven, thereby facilitating detection of the flatness of the grinding disc.

[0011] Optionally, the first cam is provided with a first mounting hole for the first mounting rod to pass through, a plurality of first magnetic strips are fixedly installed on the rod body of the first mounting rod, the first magnetic strips are arranged at intervals along the circumference of the first mounting rod, the first magnetic strips are arranged along the length direction of the first mounting rod, and the inner wall of the first mounting hole is provided with a first clamping groove matched with the first magnetic strips, and the first magnetic strips are used for being adsorbed to the inner wall of the first clamping groove.

[0012] By adopting the technical scheme, the distance from the grinding disc to the planetary gear box can be adapted and modified according to the thickness of the grinding disc. By rotating the first screw rod, the low end of the first screw rod is kept below the pressure ring when the first pressure strip passes below the pressure ring, and the low end of the first pressure strip abuts against the top side of the pressure ring. After rotating the first screw rod, the first cam is removed from the first mounting rod, then the first cam is rotated to lightly abut against the first pressure sensor, and then the first cam is put back into the first mounting rod. By adsorbing the inner wall of the first clamping groove through the first magnetic strip, the situation that the first cam falls off from the first mounting rod is reduced. At the same time, by clamping the inner wall of the first clamping groove through the first magnetic strip, the situation that the first cam and the first mounting rod rotate relative to each other is reduced.

[0013] Optionally, a first support seat is installed on the top side of the first pressure sensor, the side wall of the first support seat is connected with the outer wall of the connecting frame, a first pressing plate is arranged on the bottom side of the first pressure sensor, a first guide rod is fixedly installed on the top surface of the first pressing plate, the first support seat is provided with a first through hole for the first guide rod to pass through, a first limiting plate is fixedly installed on the end of the first guide rod away from the first pressing plate, the first pressing plate is located above the first cam, the first pressing plate is used for being extruded by the first cam, a first elastic rod is fixedly installed on the top surface of the first pressing plate, and the end of the first elastic rod away from the first pressing plate abuts against the first pressure sensor.

[0014] By adopting the technical scheme, when the first screw rod drives the first cam to rotate, the first cam pushes the first pressing plate to move upward, so that the first pressing plate extrudes the first elastic rod. By extruding the first pressure sensor through the first elastic rod, the situation that the pressure received by the first pressure sensor is too large to damage the first pressure sensor is reduced.

[0015] Optionally, a first magnetic block is fixedly installed on the side wall of the first support seat, a plurality of first insertion slots for inserting the first magnetic block are formed in the outer wall of the connecting frame and the circumferential side wall of the planetary gear box, the first insertion slots are arranged at intervals along the height direction, and the first magnetic block is adsorbed to the inner wall of the first insertion slot.

[0016] By inserting the first magnetic block into the first insertion slot, the first support seat is installed on the circumferential side wall of the connecting frame. By the plurality of first insertion slots, the position of the first support seat is adjusted, and the first cam is conveniently abutted against the first pressing plate.

[0017] Optionally, a first sliding block is arranged on the inner wall of the connecting frame, a first sliding groove for lifting and sliding the first sliding block is formed in the inner wall of the connecting frame, and the first sliding block is abutted against the part between the connection between the first screw rod and the first pressing strip and the low end of the first pressing strip.

[0018] By adopting the above technical solution, when the grinding machine vibrates to drive the first pressing strip to swing during the working process of the grinding machine, the first pressing strip is pressed by the first sliding block, so that the situation that the low end of the first pressing strip rotates upward is reduced.

[0019] Optionally, the distance between the connection between the first screw rod and the first pressing strip and the low end of the first pressing strip is greater than the distance between the connection between the first screw rod and the first pressing strip and the high end of the first pressing strip.

[0020] By adopting the above technical solution, the part between the connection between the first screw rod and the first pressing strip and the low end of the first pressing strip has a greater weight than the part between the connection between the first screw rod and the first pressing strip and the high end of the first pressing strip, so that the low end of the first pressing strip has a downward rotating trend, thereby reducing the situation that the low end of the first pressing strip rotates upward due to the influence of the vibration of the grinding machine.

[0021] A grinding machine fault diagnosis method based on case-based reasoning, a case library is established, the case library includes a plurality of cases, each case has a maintenance method, the case includes necessary information and possible information, the necessary information and the possible information each have at least one abnormal information, the necessary information is abnormal information that must appear when the grinding machine fails, the possible information is abnormal information that may appear when the grinding machine fails, and the abnormal information includes grinding machine failures observed by workers and grinding machine failures detected by a control panel.

[0022] The grinder fault diagnosis comprises the following steps: obtaining first fault information, which is abnormal information manually input into a control panel; obtaining second fault information according to the first fault information, which is abnormal information detected by the control panel; obtaining necessary information falling into a case formed by the first fault information and the second fault information; sequentially counting the number of possible information falling into the first fault information and the second fault information corresponding to each case of the case information; arranging each case of the case information according to the number of possible information falling into the first fault information and the second fault information from large to small and displaying the case on the control panel, and displaying the repair method corresponding to each case on the control panel.

[0023] By adopting the technical scheme, the worker manually inputs the observed grinder fault into the control panel as the first fault information, so that the control panel obtains the first fault information. After receiving the first fault information, the control panel detects the grinder through the first detection mechanism, the temperature sensor and the vibration sensor, and detects the current and voltage of the machine body and the motor by itself. The control panel picks out the second fault information formed by the detected data abnormality. The necessary information and possible information of each case are checked to pick out the necessary information of each case in the first fault information and the second fault information. Then, the cases are displayed on the control panel according to the number of possible information falling into the first fault information and the second fault information. The worker repairs the grinder according to the cases on the control panel, thereby facilitating the worker to repair the grinder.

[0024] Optionally, after displaying the repair method corresponding to each case on the control panel, the result information is obtained, the result information including repair success or failure; whether the result information is repair success is judged; if yes, standby is entered; if not, the cases are generated according to the first fault information and the second fault information and supplemented into the case library; and the necessary information and possible information are set according to the cases supplemented into the case library.

[0025] By adopting the technical scheme, after the worker fails to repair according to the cases displayed on the control panel, the control panel supplements the first fault information and the second fault information into the case library to form new cases. Then, the worker sets the necessary information and possible information of the abnormal information in the new cases, and supplements the repair method of the cases into the cases, thereby facilitating the worker to repair the grinder when the grinder fails again.

[0026] Optionally, after judging that the result information is repair success, the selection information is obtained, the selection information being the case used for repair success; whether the first fault information and the second fault information have abnormal information not in the selection information is judged; if yes, the abnormal information is supplemented into the possible information of the case corresponding to the selection information in the case library; if not, standby is entered.

[0027] By adopting the technical scheme, after the staff successfully performs maintenance according to the case displayed on the control panel, the abnormal information in the first fault information and the second fault information that is relative to the necessary information and the possible information of the case is removed, and then the remaining abnormal information in the first fault information and the second fault information is supplemented into the possible information of the case, so that the case in the case library is facilitated to be perfected.

[0028] In conclusion, the present application has at least one of the following beneficial technical effects:

[0029] 1. When the grinding disc is uneven, the grinding disc drives the pressure ring to revolve and rotate, and when the grinding disc passes through the low end of the first pressing strip, the grinding disc will push up the first pressing strip, the first pressing strip drives the first screw rod to rotate, and the rotation of the first screw rod is detected by the first detection mechanism and then sent to the control panel, so that the control panel can detect that the grinding disc is uneven;

[0030] 2. When the first screw rod rotates, the first screw rod drives the first cam to press the first pressure sensor, so that the rotation of the first screw rod is facilitated to be detected, and then the control panel can detect that the grinding disc is uneven;

[0031] 3. By recording cases and the corresponding maintenance methods of each case in the case library, when the grinding machine fails, the staff can maintain the grinding machine through the cases in the case library, so that the staff can maintain the grinding machine. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0033] Figure 2 is a bottom view of the planetary gear box, the shielding frame and the connecting frame of the embodiment of the present application;

[0034] Figure 3 is an explosion view between the mounting seat and the grinding disc of the embodiment of the present application;

[0035] Figure 4 is an explosion view between the first detection mechanism and the planetary gear box of the embodiment of the present application;

[0036] Figure 5 is Figure 4 is an enlarged view at A;

[0037] Figure 6 is a schematic diagram of the structure between the connecting frame, the grinding disc and the first pressing strip of the embodiment of the present application;

[0038] Figure 7 is a schematic diagram of the structure between the grinding disc and the first detection mechanism of the embodiment of the present application;

[0039] Figure 8is an exploded view between the first mounting rod and the first cam of the embodiment of the application;

[0040] Figure 9 is an exploded view between the second detection mechanism and the planetary gear box of the embodiment of the application;

[0041] Figure 10 is a structural schematic view between the connecting frame, the grinding disc and the second pressing strip of the embodiment of the application;

[0042] Figure 11 is Figure 9 is an exploded view at B;

[0043] Figure 12 is a structural schematic view between the second detection mechanism and the grinding disc of the embodiment of the application;

[0044] Figure 13 is an exploded view between the second mounting rod and the second cam of the embodiment of the application;

[0045] Figure 14 is a principle block diagram of the fault diagnosis method of the embodiment of the application.

[0046] BRIEF DESCRIPTION OF DRAWINGS 1, machine body; 2, handle; 3, planetary gear box; 4, motor; 5, mounting seat; 6, grinding disc; 7, grinding disc; 8, connecting frame; 9, shielding frame; 10, control panel; 11, temperature sensor; 12, vibration sensor; 13, pressing ring; 14, first pressing strip; 15, second pressing strip; 16, first screw rod; 17, second screw rod; 18, first screw hole; 19, second screw hole; 20, first sliding block; 21, second sliding block; 22, first sliding groove; 23, second sliding groove; 24, first detection mechanism; 241, first mounting rod; 242, first cam; 243, first pressure sensor; 25, second detection mechanism; 251, second mounting rod; 252, second cam; 253, second pressure sensor; 26, first support seat; 27, second support seat; 28, first magnetic block; 29, second magnetic block; 30, first insertion slot; 31, second insertion slot; 32, first pressing plate; 33, second pressing plate; 34, first guide rod; 35, second guide rod; 36, first through hole; 37, second through hole; 38, first limiting plate; 39, second limiting plate; 40, first elastic rod; 41, second elastic rod; 42, first mounting hole; 43, second mounting hole; 44, first magnetic strip; 45, second magnetic strip; 46, first clamping slot; 47, second clamping slot. DETAILED DESCRIPTION

[0047] The following will be described in detail below Figures 1-14 The application will be further described in detail.

[0048] The embodiment of the application discloses a grinding machine and a grinding machine fault diagnosis method based on case reasoning.

[0049] Referring to Figure 1 , Figure 2 , a grinder comprises a body 1, a handle 2, a planetary gearbox 3 and a motor 4. The handle 2 is installed on one side of the body 1, and the planetary gearbox 3 is installed on the side of the body 1 away from the handle 2. The top side of the planetary gearbox 3 has an input end, and the bottom side of the planetary gearbox 3 has a plurality of output ends. In the embodiment of the present application, the bottom side of the planetary gearbox 3 has four output ends. The body 1 of the motor 4 is fixedly installed on the top side of the planetary gearbox 3, and the rotating shaft of the motor 4 is connected with the input end of the planetary gearbox 3.

[0050] Referring to Figure 2 , Figure 3 , the bottom side of the planetary gearbox 3 is provided with a number of mounting seats 5 equal to the number of output ends of the planetary gearbox 3. The surface of the mounting seat 5 is connected with the output end of the planetary gearbox 3. The motor 4 drives each mounting seat 5 to rotate around its own axis through the planetary gearbox 3, and also drives each mounting seat 5 to revolve around the rotating shaft of the motor 4 through the planetary gearbox 3.

[0051] The side of the mounting seat 5 away from the planetary gearbox 3 is installed with a grinding disc 6. The grinding disc 6 is generally installed on the mounting seat 5 through three bolts, which are equally spaced around the central axis of the grinding disc 6. The grinding disc 6 is leveled by rotating the bolts.

[0052] Referring to Figure 2 , Figure 3 , the side of the grinding disc 6 away from the mounting seat 5 is installed with a plurality of grinding sheets 7, which are arranged along the circumferential direction of the grinding disc 6. The grinding sheets 7 are generally magnetically attached to the grinding disc 6. After selecting the grinding sheets 7 according to the ground surface to be polished, the distance between the grinding disc 6 and the planetary gearbox 3 is adjusted by rotating the three bolts according to the thickness of the grinding sheets 7, and then the grinding sheets 7 are installed on the grinding disc 6.

[0053] Referring to Figure 4 , the side of the planetary gearbox 3 away from the motor 4 is fixedly installed with a connecting frame 8 along the circumferential direction, and the side of the connecting frame 8 away from the planetary gearbox 3 is fixedly installed with a shielding frame 9. The shielding frame 9 is elastic, so as to facilitate the movement of the grinder.

[0054] The grinder is placed on the ground surface to be polished, and the motor 4 is started. The motor 4 drives each mounting seat 5 to revolve and rotate around its own axis through the planetary gearbox 3. The grinding disc 6 rotates with the mounting seat 5, so as to drive each grinding sheet 7 to polish the ground surface. The dust generated by the grinding sheet 7 polishing the ground surface is shielded by the shielding frame 9 and the connecting frame 8, so as to reduce the situation that the staff inhales the dust.

[0055] Referring to Figure 1The handle 2 is fixedly installed with a control panel 10, and the control panel 10 is internally provided with a controller for controlling the whole machine and reading signals detected by various sensors. The control panel 10 detects the power supply current and voltage of the motor 4 and the machine body 1. When the power supply voltage and current of the machine body 1 are insufficient, an alarm is sent. When the motor 4 drives the abrasive disc 7 to grind the ground through the planetary gear box 3, according to the rotation and revolution speed of the abrasive disc 6, a current and voltage threshold is set artificially, and when the current and voltage of the motor 4 exceed the preset threshold, an alarm is sent. The grinder is detected by the control panel 10, so that the staff can easily find the fault of the grinder.

[0056] With reference to Figure 1 , Figure 4 The planetary gear box 3 is installed with a temperature sensor 11 and a vibration sensor 12, and the temperature sensor 11 and the vibration sensor 12 are electrically connected with the control panel 10. The temperature sensor 11 is used to detect the temperature inside the planetary gear box 3 and generate a temperature signal sent to the control panel 10. The staff sets the temperature threshold inside the planetary gear box 3 according to the different rotating speed of each motor 4, and when the temperature inside the planetary gear box 3 exceeds the temperature threshold, the control panel 10 sends an alarm, so that the staff can easily find the fault of the planetary gear box 3.

[0057] The vibration sensor 12 is used to detect the vibration of the grinder, and the staff sets the vibration threshold of the grinder when working in advance. When the control panel 10 detects that the vibration of the grinder exceeds the vibration threshold through the vibration sensor 12, the control panel 10 sends an alarm.

[0058] With reference to Figure 5 , Figure 6 The peripheral side wall of each abrasive disc 6 is fixedly installed with a compression ring 13, and the inner wall of the connecting frame 8 is provided with a first pressing strip 14. The strip body of the first pressing strip 14 is fixedly installed with a first screw rod 16. The peripheral side wall of the connecting frame 8 is provided with a first screw hole 18 for the first screw rod 16 to pass through. The first pressing strip 14 is arranged along the circumference of the connecting frame 8, and the first pressing strip 14 is gradually lifted from one end to the other end and is arranged in an inclined manner. The first screw rod 16 is rotated, so as to adjust the inclination of the first pressing strip 14, and then when the compression ring 13 is driven by the revolution of the abrasive disc 6 to pass below the low end of the first pressing strip 14, the low end of the first pressing strip 14 abuts against the top side of the compression ring 13.

[0059] With reference to Figure 5 , Figure 6The inner wall of the connecting frame 8 is provided with a first sliding block 20, and the inner wall of the connecting frame 8 is provided with a first sliding groove 22 for lifting and sliding of the first sliding block 20. The first sliding block 20 is attached to the part between the connection of the first screw rod 16 and the first pressing strip 14 and the low end of the first pressing strip 14. The distance between the connection of the first screw rod 16 and the first pressing strip 14 and the low end of the first pressing strip 14 is greater than the distance between the connection of the first screw rod 16 and the first pressing strip 14 and the high end of the first pressing strip 14.

[0060] The first sliding block 20 is pressed downward by gravity to the part between the connection of the first screw rod 16 and the first pressing strip 14 and the low end of the first pressing strip 14, and the weight of the part between the connection of the first screw rod 16 and the first pressing strip 14 and the low end of the first pressing strip 14 is greater than the part between the connection of the first screw rod 16 and the first pressing strip 14 and the high end of the first pressing strip 14, so that the low end of the first pressing strip 14 has a tendency to rotate downward. Through the tendency of the low end of the first pressing strip 14 to rotate downward, the situation that the low end of the first pressing strip 14 is driven upward after the vibration of the grinding machine is reduced.

[0061] Referring to Figure 5 , Figure 7 The outer wall of the connecting frame 8 is provided with a first detection mechanism 24, and the first detection mechanism 24 comprises a first mounting rod 241, a first cam 242 and a first pressure sensor 243. The top side of the first pressure sensor 243 is fixedly installed with a first support seat 26, and the side wall of the first support seat 26 is fixedly installed with a first magnetic block 28. The outer wall of the connecting frame 8 and the peripheral side wall of the planetary gear box 3 are provided with a plurality of first insertion grooves 30 for insertion of the first magnetic block 28. The plurality of first insertion grooves 30 are arranged at intervals along the height direction. The first magnetic block 28 is adsorbed to the inner wall of the first insertion groove 30. The position of the first magnetic block 28 inserted into the first insertion groove 30 is adjusted, so as to facilitate movement of the first pressure sensor 243.

[0062] Referring to Figure 5 , Figure 7 The bottom side of the first pressure sensor 243 is provided with a first pressing plate 32, and one side of the first pressing plate 32 close to the first support seat 26 is fixedly installed with a first guide rod 34. The first support seat 26 is provided with a first through hole 36 for penetration of the first guide rod 34, and one end of the first guide rod 34 away from the first pressing plate 32 is fixedly installed with a first limiting plate 38. Through cooperation of the first guide rod 34 and the first through hole 36, the first pressing plate 32 is facilitated to move close to or away from the first pressure sensor 243.

[0063] Referring to Figure 5 , Figure 7A first elastic rod 40 is fixedly installed on the side of the first pressure plate 32 near the first support base 26, and the first elastic rod 40 abuts against the bottom side of the first pressure sensor 243. The first pressure sensor 243 is electrically connected to the control panel 10. The first pressure sensor 243 detects the pressure of the first elastic rod 40, generates a pressure signal, and sends it to the control panel 10, thereby enabling the control panel 10 to detect the pressure of the first elastic rod 40 on the first pressure sensor 243.

[0064] Reference Figure 5 , Figure 8 The first mounting rod 241 is located below the first pressure plate 32, and one end of the first mounting rod 241 is fixedly connected to the end of the first screw 16 away from the first pressure strip 14. The first cam 242 has a first mounting hole 42 for the first mounting rod 241 to pass through. Multiple first magnetic strips 44 are fixedly mounted on the body of the first mounting rod 241, and the multiple first magnetic strips 44 are arranged at intervals along the circumference of the first mounting rod 241. The first magnetic strips 44 are arranged along the length direction of the first mounting rod 241, and the inner wall of the first mounting hole 42 has a first slot 46 that matches the first magnetic strips 44. The first magnetic strips 44 are used to adhere to the inner wall of the first slot 46.

[0065] Different grinding discs 7 are selected according to the surface to be ground, and the thickness of different grinding discs 7 may vary. Therefore, the distance between the grinding disc 6 and the planetary gearbox 3 needs to be adjusted. After adjusting the distance between the grinding disc 6 and the planetary gearbox 3, the first screw 16 is rotated, causing the grinding disc 6 to revolve, at which point the lower end of the first pressure strip 14 abuts against the top side of the pressure ring 13. Then, the protruding part of the first cam 242 is tilted and lightly pressed against the bottom side of the first pressure plate 32. The first cam 242 is then inserted into the first mounting rod 241 through the first mounting hole 42. The first magnetic strip 44 and the first slot 46 cooperate to fix the first cam 242 on the first mounting rod 241.

[0066] The grinding disc 6 drives the pressure ring 13 to revolve and rotate, and the pressure ring 13 passes below the lower end of the first pressure bar 14. When the grinding disc 6 is uneven, the grinding disc 6 causes the pressure ring 13 to tilt upwards, thereby pushing the lower end of the first pressure bar 14 to rotate upwards. The upward rotation of the lower end of the first pressure bar 14 drives the first screw 16 to rotate, and the first screw 16 drives the first cam 242 to rotate, pressing the first pressure plate 32 upwards. The upward movement of the first pressure plate 32 will press the first elastic rod 40, thereby changing the pressure of the first elastic rod 40 detected by the first pressure sensor 243. According to the pressure threshold detected by the first pressure sensor 243, when the pressure of the first elastic rod 40 on the first pressure sensor 243 exceeds the preset pressure threshold, the control panel 10 issues an alarm to remind the operator that the grinding disc 6 is uneven, thus facilitating the detection of the flatness of the grinding disc 6.

[0067] Reference Figure 9 ,Figure 10 The inner wall of the connecting frame 8 is provided with a second pressing strip 15. The body of the second pressing strip 15 is fixedly installed with a second screw rod 17.

[0068] Referring to Figure 10 , Figure 11 The circumferential wall of the connecting frame 8 is provided with a second screw hole 19 for the second screw rod 17 to pass through. The second pressing strip 15 is arranged along the circumference of the connecting frame 8, and the second pressing strip 15 is gradually raised from one end to the other end and arranged obliquely. The second screw rod 17 is rotated to adjust the inclination of the second pressing strip 15, so that when the grinding disc 6 rotates to drive the pressing ring 13 to pass above the high end of the second pressing strip 15, the high end of the second pressing strip 15 abuts against the bottom side of the pressing ring 13.

[0069] Referring to Figure 10 , Figure 11 The inner wall of the connecting frame 8 is provided with a second sliding block 21, and the inner wall of the connecting frame 8 is provided with a second sliding groove 23 for the second sliding block 21 to slide up and down. The second sliding block 21 abuts against the portion between the connection of the second screw rod 17 and the second pressing strip 15 and the high end of the second pressing strip 15. The distance between the connection of the second screw rod 17 and the second pressing strip 15 and the low end of the second pressing strip 15 is less than the distance between the connection of the second screw rod 17 and the second pressing strip 15 and the high end of the second pressing strip 15.

[0070] The second sliding block 21 is pressed downward by gravity on the portion between the connection of the second screw rod 17 and the second pressing strip 15 and the high end of the second pressing strip 15, and the weight of the portion between the connection of the second screw rod 17 and the second pressing strip 15 and the low end of the second pressing strip 15 is less than the portion between the connection of the second screw rod 17 and the second pressing strip 15 and the high end of the second pressing strip 15, so that the high end of the second pressing strip 15 has a tendency to rotate downward. Through the tendency of the high end of the second pressing strip 15 to rotate downward, the situation that the grinding machine vibrates to drive the high end of the second pressing strip 15 to rotate upward is reduced.

[0071] Referring to Figure 11 , Figure 12 The outside of the connecting frame 8 is provided with a second detection mechanism 25, and the second detection mechanism 25 includes a second mounting rod 251, a second cam 252, and a second pressure sensor 253. The top side of the second pressure sensor 253 is fixedly installed with a second support seat 27, and the side wall of the second support seat 27 is fixedly installed with a second magnetic block 29. The outer wall of the connecting frame 8 and the circumferential wall of the planetary gear box 3 are provided with a plurality of second insertion grooves 31 for the second magnetic block 29 to insert. The plurality of second insertion grooves 31 are arranged at intervals along the height direction. The second magnetic block 29 is attracted to the inner wall of the second insertion groove 31. The position of the second magnetic block 29 inserted into the second insertion groove 31 is adjusted to facilitate the movement of the second pressure sensor 253.

[0072] Referring to Figure 11 ,Figure 12 The bottom side of the second pressure sensor 253 is provided with a second pressing plate 33, and one side of the second pressing plate 33 close to the second support base 27 is fixedly installed with a second guide rod 35. The second support base 27 is provided with a second through hole 37 for the second guide rod 35 to pass through, and one end of the second guide rod 35 away from the second pressing plate 33 is fixedly installed with a second limiting plate 39. Through the cooperation of the second guide rod 35 and the second through hole 37, the second pressing plate 33 is conveniently moved close to or away from the second pressure sensor 253.

[0073] With reference to Figure 11 , Figure 12 One side of the second pressing plate 33 close to the second support base 27 is fixedly installed with a second elastic rod 41, and the second elastic rod 41 abuts against the bottom side of the second pressure sensor 253. The second pressure sensor 253 is electrically connected with the control panel 10, the second pressure sensor 253 detects the pressure of the second elastic rod 41 and generates a pressure signal sent to the control panel 10, so that the control panel 10 detects the pressure of the second elastic rod 41 on the second pressure sensor 253.

[0074] With reference to Figure 11 , Figure 13 The second installation rod 251 is located below the second pressing plate 33, and one end of the second installation rod 251 is fixedly connected with one end of the second screw rod 17 away from the second pressing strip 15. The second cam 252 is provided with a second installation hole 43 for the second installation rod 251 to pass through, the rod body of the second installation rod 251 is fixedly installed with a plurality of second magnetic strips 45, and the plurality of second magnetic strips 45 are arranged at intervals along the circumference of the second installation rod 251. The second magnetic strips 45 are arranged along the length direction of the second installation rod 251, the inner wall of the second installation hole 43 is provided with a second clamping groove 47 matched with the second magnetic strips 45, and the second magnetic strips 45 are used for being adsorbed to the inner wall of the second clamping groove 47.

[0075] Different abrasive discs 7 are selected according to the ground to be polished, and the thickness of different abrasive discs 7 may be different. Therefore, the distance between the grinding disc 6 and the planetary gear box 3 needs to be adjusted. After adjusting the distance between the grinding disc 6 and the planetary gear box 3, the second screw rod 17 is rotated, the grinding disc 6 revolves, and the high end of the second pressing strip 15 abuts against the bottom side of the pressing ring 13. Then, the second cam 252 is inclined and lightly abuts against the bottom side of the second pressing plate 33, and then the second cam 252 is sleeved into the second installation rod 251 through the second installation hole 43, and the second magnetic strips 45 and the second clamping grooves 47 are matched, so that the second cam 252 is fixed on the second installation rod 251.

[0076] The grinding disc 6 drives the pressure ring 13 to revolve and rotate, and the pressure ring 13 passes above the high end of the second pressing strip 15. When the grinding disc 6 is not flat, the grinding disc 6 drives the pressure ring 13 to be warped, so that the pressure ring 13 pushes the high end of the second pressing strip 15 to rotate downward. The downward rotation of the high end of the second pressing strip 15 drives the second screw rod 17 to rotate, and the second screw rod 17 drives the second cam 252 to rotate and extrude the second pressing plate 33 to move upward. The upward movement of the second pressing plate 33 extrudes the second elastic rod 41, so that the pressure of the second elastic rod 41 detected by the second pressure sensor 253 changes. Through the manually preset pressure threshold value detected by the second pressure sensor 253, when the pressure of the second elastic rod 41 on the second pressure sensor 253 is greater than the preset pressure threshold value, the control panel 10 issues an alarm to remind the staff that the grinding disc 6 is not flat, so as to facilitate the detection of the flatness of the grinding disc 6.

[0077] With reference to Figure 7 、 Figure 12 The bottom end of the first pressing strip 14 abuts against the top side of the pressure ring 13, and the high end of the second pressing strip 15 abuts against the top side of the pressure ring 13, thereby giving a way of detecting the inclination of the grinding disc 6 at different positions by the first pressing strip 14 and the second pressing strip 15. And the first pressing strip 14 and the second pressing strip 15 together detect the grinding disc 6, thereby facilitating the acceleration of the detection speed.

[0078] With reference to Figure 14 A grinding machine fault diagnosis method based on case-based reasoning is applied to the grinding machine of the present application,

[0079] First, a case library is established.

[0080] The case library includes a plurality of cases, each case having a repair method. The case includes necessary information and possible information, and the necessary information and the possible information each have at least one abnormal information. The abnormal information has a value when the control panel 10 detects that the current and voltage of the motor 4 and the body 1 appear abnormal, and the control panel 10 detects that the grinding machine appears abnormal through the vibration sensor 12, the temperature sensor 11, the first pressure sensor 243 and the second pressure sensor 253.

[0081] The necessary information is the abnormal information that must appear when the grinding machine fails. The possible information is the abnormal information that may appear when the grinding machine fails.

[0082] First example: the grinding machine appears a vibration fault, and the control panel 10 detects that the vibration of the grinding machine appears abnormal through the vibration sensor 12 and generates abnormal information, which is necessary information.

[0083] The vibration of the grinder can be caused by the unevenness of the grinding disc 6 and the aging of the motor 4. The control panel 10 detects the flatness of the grinding disc 6 through the first pressure sensor 243 and the second pressure sensor 253. When the grinding disc 6 is not flat, the control panel 10 receives the signal output by the first pressure sensor 243 and the second pressure sensor 253, which exceeds the preset pressure threshold, thereby generating an abnormal information, which is a possible information. When the motor 4 is aging, the current required for the rotation of the motor 4 increases. When the control panel 10 detects that the current of the motor 4 exceeds the preset current threshold, it generates an abnormal information, which is a possible information.

[0084] Second example: the grinding disc 6 is not flat, and the control panel 10 receives the signal of the first pressure sensor 243 and the second pressure sensor 253, which exceeds the preset threshold and generates an abnormal information, which is a necessary information. At the same time, the unevenness of the grinding disc 6 drives the vibration of the grinder, and the control panel 10 detects the abnormal vibration of the grinder through the vibration sensor 12 and generates an abnormal information, which is also a necessary information.

[0085] The unevenness of the grinding disc 6 can also cause the current required for the revolution and rotation of the grinding disc 6 driven by the motor 4 to increase, and the temperature inside the planetary gear box 3 to rise. When the control panel 10 detects that the current of the motor 4 exceeds the preset current threshold, it generates an abnormal information, which is a possible information. The control panel 10 detects the temperature inside the planetary gear box 3 through the temperature sensor 11, which exceeds the preset threshold and generates an abnormal information, which is also a possible information.

[0086] After the case library is established, the fault diagnosis of the grinder includes the following steps:

[0087] S1, obtain the first fault information. Then execute step S1.

[0088] After the staff finds that the grinder has a fault, they input the observed symptom fault into the control panel 10. The control panel 10 has pre-recorded symptom faults. The first fault information is formed according to the symptom fault input by the staff into the control panel 10. The symptom fault is the observed fault of the grinder, such as the failure of the motor 4 to start, the failure of the body 1 to start, or the noise of the motor 4 running, etc.

[0089] S2, obtain the second fault information according to the first fault information. Then execute step S3.

[0090] The second fault information is the abnormal information generated by the control panel 10 detecting the abnormal current and voltage of the motor 4, the abnormal current and voltage of the body 1, and the abnormal information generated by the control panel 10 detecting the abnormality of the grinder through the first pressure sensor 243, the second pressure sensor 253, the vibration sensor 12 and the temperature sensor 11.

[0091] S3, obtain the collective information of the cases in which the necessary information falls into the first fault information and the second fault information. Then, perform step S4.

[0092] The control panel 10 retrieves each case in the case library, compares the necessary information of each case with the first fault information and the second fault information, and collects the cases in which the necessary information all belongs to the first fault information and the second fault information to form the collective information.

[0093] S4, count the number of the possible information corresponding to each case in the collective information that falls into the first fault information and the second fault information in sequence. Then, perform step S5.

[0094] The control panel 10 counts the number of the possible information of each case in the collective information that falls into the first fault information and the second fault information.

[0095] S5, arrange each case in the collective information according to the number of the possible information that falls into the first fault information and the second fault information from large to small, and display each case and the corresponding repair method on the control panel 10. Then, perform step S6.

[0096] S6, obtain the result information. Then, perform step S7.

[0097] The result information includes success or failure of the repair. The worker repairs the case according to the case and the repair method displayed on the control panel 10. The worker inputs success of the repair to the control panel 10 after the repair is successful. The worker inputs failure of the repair to the control panel 10 after the repair fails.

[0098] S7, determine whether the result information is success of the repair; if yes, perform step S8, if not, perform step S12.

[0099] S8, obtain the selection information. Then, perform step S9.

[0100] After the worker repairs the case successfully, the worker selects the case and the repair method of the successful repair and inputs them to the control panel 10, so that the control panel 10 obtains the selection information.

[0101] S9, determine whether the first fault information and the second fault information have abnormal information that is not in the selection information; if yes, perform step S10; if not, perform step S11.

[0102] S10, supplement the abnormal information into the possible information of the case corresponding to the selection information in the case library.

[0103] S11, enter standby.

[0104] After the maintenance is successful, the control panel 10 removes the part of the first fault information and the second fault information coinciding with the case according to the necessary information and the possible information corresponding to the case used by the staff, and then supplements the remaining abnormal information of the first fault information and the second fault information into the possible information of the case.

[0105] S12, generating the case after the first fault information and the second fault information, and supplementing the case into the case library. Then, step S13 is performed.

[0106] S13, setting the necessary information and the possible information according to the case supplemented into the case library.

[0107] After the first fault information and the second fault information are combined into the new case, the manager of the case library sets the case supplemented into the case library, and divides the abnormal information corresponding to part of the case in the case library into the necessary information and the possible information.

[0108] The implementation principle of the grinding machine and the grinding machine fault diagnosis method based on case reasoning in the embodiment of the application is as follows: when the grinding machine is driven to grind the ground, if the bolt connected between the grinding disc 6 and the mounting seat 5 is loose, the grinding disc 6 will be uneven. After the grinding disc 6 is uneven, when the motor 4 drives the grinding disc 6 to revolve and rotate through the planetary gear box 3, the grinding disc 6 will push up the low end of the first pressing strip 14 to rotate upward, thereby driving the first screw rod 16 to rotate. The control panel 10 detects the rotation of the first screw rod 16 through the first detection mechanism 24, and then the control panel 10 issues an alarm, thereby facilitating the detection of the flatness of the grinding disc 6.

[0109] The above are the preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A grinding machine, comprising a body (1), a handle (2) mounted on one side of the body (1), and a planetary gearbox (3) mounted on the side of the body (1) away from the handle (2), wherein a motor (4) is mounted on the top side of the planetary gearbox (3), and a plurality of mounting seats (5) are mounted on the bottom side of the planetary gearbox (3), wherein a grinding disc (6) is mounted on the side of the mounting seat (5) away from the planetary gearbox (3), and each grinding disc (6) is equipped with a grinding blade (7), characterized in that: A connecting frame (8) is fixedly installed circumferentially on the side of the planetary gearbox (3) away from the motor (4). A shielding frame (9) is fixedly installed on the side of the connecting frame (8) away from the planetary gearbox (3). A pressure ring (13) is fixedly installed on the peripheral sidewall of the grinding disc (6). A first pressure strip (14) is provided on the inner wall of the connecting frame (8). A first screw (16) is fixedly installed on the first pressure strip (14). A first screw hole (18) is opened on the peripheral sidewall of the connecting frame (8) for the first screw (16) to pass through. The first pressure strip (14) The first pressure strip (14) is gradually raised from one end to the other and is inclined along the circumference of the connecting frame (8). The lower end of the first pressure strip (14) is used to abut against the top side of the pressure ring (13). The first screw (16) is equipped with a first detection mechanism (24) at the end away from the first pressure strip (14). The handle (2) is equipped with a control panel (10). The first detection mechanism (24) is electrically connected to the control panel (10). The control panel (10) detects the rotation of the first screw (16) through the first detection mechanism (24).

2. The grinding machine according to claim 1, characterized in that: The first detection mechanism (24) includes a first mounting rod (241), a first cam (242) and a first pressure sensor (243). The first pressure sensor (243) is mounted on the outer wall of the connecting frame (8). One end of the first mounting rod (241) is connected to the end of the first screw (16) away from the first pressure bar (14). The first cam (242) is mounted on the first mounting rod (241). The first pressure sensor (243) is used to abut against the first cam (242) after rotation. The first pressure sensor (243) is electrically connected to the control panel (10).

3. A grinding machine according to claim 2, characterized in that: The first cam (242) has a first mounting hole (42) through which the first mounting rod (241) passes. Multiple first magnetic strips (44) are fixedly mounted on the rod body of the first mounting rod (241). The multiple first magnetic strips (44) are spaced apart along the circumference of the first mounting rod (241). The first magnetic strips (44) are arranged along the length of the first mounting rod (241). The inner wall of the first mounting hole (42) has a first slot (46) that matches the first magnetic strips (44). The first magnetic strips (44) are used to adhere to the inner wall of the first slot (46).

4. A grinding machine according to claim 2, characterized in that: A first support base (26) is installed on the top side of the first pressure sensor (243). The side wall of the first support base (26) is connected to the outer wall of the connecting frame (8). A first pressure plate (32) is provided on the bottom side of the first pressure sensor (243). A first guide rod (34) is fixedly installed on the top surface of the first pressure plate (32). The first support base (26) has a first through hole (36) for the first guide rod (34) to pass through. A first limiting plate (38) is fixedly installed on the end of the first guide rod (34) away from the first pressure plate (32). The first pressure plate (32) is located above the first cam (242). The first pressure plate (32) is used for the first cam (242) to press. A first elastic rod (40) is fixedly installed on the top surface of the first pressure plate (32). The end of the first elastic rod (40) away from the first pressure plate (32) abuts against the first pressure sensor (243).

5. A grinding machine according to claim 4, characterized in that: The first support base (26) has a first magnetic block (28) fixedly installed on its side wall. The outer wall of the connecting frame (8) and the peripheral side wall of the planetary gearbox (3) are provided with a plurality of first slots (30) for the first magnetic block (28) to be inserted. The first slots (30) are spaced apart along the height direction. The first magnetic block (28) is attracted to the inner wall of the first slot (30).

6. A grinding machine according to claim 1, characterized in that: The inner wall of the connecting frame (8) is provided with a first slider (20), and the inner wall of the connecting frame (8) is provided with a first sliding groove (22) for the slider to move up and down. The first slider (20) abuts against the part between the connection between the first screw (16) and the first pressure strip (14) and the lower end of the first pressure strip (14).

7. A grinding machine according to claim 1, characterized in that: The distance between the connection point of the first screw (16) and the first pressure bar (14) and the lower end of the first pressure bar (14) is greater than the distance between the connection point of the first screw (16) and the first pressure bar (14) and the upper end of the first pressure bar (14).

8. A case-based reasoning-based fault diagnosis method for a grinding machine, applied to the grinding machine described in claim 7, characterized in that, Establish a case library, which includes multiple cases. Each case has a repair method. The case includes necessary information and possible information. Both necessary information and possible information have at least one abnormal information. Necessary information is the abnormal information that will definitely appear when the grinder fails. Possible information is the abnormal information that may appear when the grinder fails. Abnormal information includes the grinder failure observed by the staff and the grinder failure detected by the control panel (10). The fault diagnosis of the grinding machine includes the following steps: obtaining first fault information, which is the abnormal information manually input into the control panel (10); obtaining second fault information based on the first fault information, which is the abnormal information detected by the control panel (10) of the grinding machine; obtaining necessary information to form a collection of cases that fall into the first fault information and the second fault information; sequentially counting the number of possible information that fall into the first fault information and the second fault information for each case in the collection information; arranging each case in the collection information from largest to smallest according to the number of possible information that falls into the first fault information and the second fault information and displaying it on the control panel (10), and displaying the repair method corresponding to each case on the control panel (10).

9. A method for diagnosing grinding machine faults based on case-based reasoning according to claim 8, characterized in that: After displaying the repair method corresponding to each case on the control panel (10), obtain the result information, which includes whether the repair was successful or failed; determine whether the result information indicates that the repair was successful. If yes, then enter standby mode; if not, then generate a case based on the first and second fault information and add it to the case library; set the necessary and possible information based on the case added to the case library.

10. A method for diagnosing grinding machine faults based on case-based reasoning according to claim 9, characterized in that: After determining that the repair was successful, select information is obtained, which is the case used for successful repair; determine whether there is any abnormal information in the first fault information and the second fault information that is not in the select information; If so, add the exception information to the possible information of the case corresponding to the selected information in the case library; If not, then enter standby mode.

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