Conveying device for grinding the paintwork of a complete vehicle

Abstract

The application provides a conveying device for whole vehicle paint surface grinding processing, comprising a frame; two linear modules are arranged in the frame, and a polishing robot is installed on the linear modules; a roller conveyor is arranged between the two linear modules; two side shells are arranged on the top of the roller conveyor; a plurality of roller bodies are arranged between the two side shells; a bearing is fixed in the side shell; an end shaft arranged at the end of the roller body is fixed with an inner ring of the bearing; an outer ring of the bearing is connected with a lubricating oil supply mechanism; the lubricating oil supply mechanism is connected with an oil storage box; an oil guide part is arranged below the bearing and extends into the oil storage box; a belt-shaped filtering part in a closed ring shape is arranged in the oil storage box; the belt-shaped filtering part is connected with a driving part; the driving part is used to drive the belt-shaped filtering part to make a closed ring circular motion along the length direction of the belt-shaped filtering part; and a cleaning part is arranged on the bottom side of the belt-shaped filtering part. The application realizes synchronous and sufficient lubrication of the whole bearing ball, reduces the rolling friction wear rate, and prolongs the service life of the bearing.

Description

Technical Field

[0001] This invention relates to the field of whole vehicle paint grinding technology, and particularly to a conveying device for whole vehicle paint grinding. Background Technology

[0002] Automotive painting is one of the core processes in automobile manufacturing, and the quality of the paint finish directly affects the overall appearance and market acceptance of the vehicle. In the painting process, after the first coat is sprayed and baked, surface defects such as particles, runs, and orange peel are prone to appear. These defects need to be repaired through a sanding process before the second coat is applied to ensure the smoothness and gloss of the final paint surface.

[0003] Currently, paint polishing largely relies on manual hand-held polishing tools, which suffers from high labor intensity, low production efficiency, and inconsistent polishing quality due to variations in operator skill. This is especially problematic for high-end show cars and test drive vehicles, where the precision and stability of manual polishing are insufficient to meet the stringent appearance standards. With the development of automated processing technology, the use of polishing robots in conjunction with conveyor systems to automate the polishing of the entire vehicle's paint surface has become an inevitable trend in the industry.

[0004] Existing conveyor systems used for grinding the paint surface of vehicles mostly employ roller conveyors to transfer the vehicle body. Due to the significant weight of the vehicle, when the vehicle body is placed on the roller conveyor rollers, the entire weight acts directly on the end support bearings through the rollers and end shafts. This results in extremely high contact stress between the bearing balls and raceways, significantly increasing the wear rate of rolling friction during roller rotation. Long-term operation can easily lead to excessively rapid bearing wear and short service life. To reduce bearing wear, the conventional method is to manually lubricate the bearings periodically. However, manual lubrication has drawbacks such as untimely lubrication and uneven lubrication, easily causing localized dry friction due to insufficient lubrication in certain areas of the bearing.

[0005] Therefore, a conveying device for grinding the paint surface of a vehicle is provided to address the above-mentioned problems. Summary of the Invention

[0006] In order to solve the technical problem of how to achieve automatic and uniform oil replenishment and lubrication of support bearings, the present invention provides a conveying device for grinding the paint surface of a vehicle.

[0007] The present invention solves the above-mentioned technical problems through the following technical solutions: This invention provides a conveying device for grinding the paint surface of a vehicle, comprising a frame; two linear modules are arranged within the frame, and a grinding robot is mounted on each linear module; a roller conveyor is arranged between the two linear modules; two side shells are arranged on the top of the roller conveyor, and multiple rollers are arranged between the two side shells; a bearing is fixed inside the side shell, and an end shaft located at the end of each roller is fixed to the inner ring of the bearing; a lubrication mechanism is connected to the outer ring of the bearing, and the lubrication mechanism is used to uniformly supply oil to the inner side of the outer ring; an oil storage box is connected to the lubrication mechanism, and an oil guide is arranged below the bearing, extending into the oil storage box; a closed-loop strip filter is arranged inside the oil storage box, and a drive unit is connected to the strip filter; the drive unit is used to drive the strip filter to perform a closed-loop cyclic motion along its own length; a cleaning unit is arranged on the bottom side of the strip filter.

[0008] Preferably, the lubrication mechanism includes a cylinder fixedly installed inside the side shell; a piston is fitted inside the cylinder, a pressure block is fixed on one side of the piston, and the other side of the piston is elastically connected to the inner wall of the cylinder through a second spring. An oil inlet check valve and an oil outlet check valve are installed at the end of the cylinder away from the pressure block. The oil inlet check valve is connected to the bottom of the oil storage box through an oil inlet pipe. The oil storage box is connected to an oil outlet pipe, and the oil outlet pipe is connected to an oil inlet provided on the outer ring.

[0009] Preferably, the pressure block extends to the side of the side shell near the roller body, and a first pressure inclined surface is provided at the end of the pressure block away from the piston; it also includes a material support tray for carrying the vehicle body; a first extrusion inclined surface for extruding the first pressure inclined surface is provided on one side of the material support tray.

[0010] Preferably, the outer ring is fixed with an inner frame, and the inner frame is fixed inside the side shell. The outer ring wall has an annular cavity, which is connected to the oil inlet. The inner side of the outer ring has a plurality of inner holes arranged in an annular array, and the inner holes are connected to the cavity.

[0011] Preferably, it further includes a power mechanism, which includes a connecting rod; the connecting rod is fixed to one side of the pressure block, and a wedge block is fixed to the connecting rod; a movable frame is provided at the bottom of the wedge block; a second extrusion inclined surface and a second pressure inclined surface are respectively provided on the bottom surface of the wedge block and the top surface of the movable frame, and the second extrusion inclined surface and the second pressure inclined surface are in contact with each other; a guide seat is fixed inside the side shell; the guide seat is slidably sleeved with the movable frame; and the movable frame is elastically connected to the bottom inner wall of the side shell through a second spring; the bottom end of the movable frame is connected to the power input end of the drive unit.

[0012] Preferably, the strip filter section includes a strip of flexible filter screen. A side groove is provided on both sides of the oil storage box. The top of the flexible filter screen passes through the side groove, and the bottom of the flexible filter screen is located at the bottom of the oil storage box. A rotating cylinder is provided on the outer side of the two side grooves and on both sides of the bottom of the oil storage box. The four rotating cylinders are rotatably mounted on the side wall of the oil storage box. The flexible filter screen is wound around the four rotating cylinders. One end of the rotating cylinder is connected to the power output end of the drive unit.

[0013] Preferably, the drive unit includes a first synchronous pulley and a second synchronous pulley. The first synchronous pulley is fixed to one end of the rotating drum, and the second synchronous pulley is rotatably mounted on the outer wall of the oil storage box. A synchronous belt is wound between the first synchronous pulley and the second synchronous pulley. A friction wheel is coaxially fixed to the second synchronous pulley. A friction strip is provided on one side of the friction wheel, and a top seat is provided on the top of the friction strip. The top seat is connected to the bottom of the movable frame. A one-way anti-reverse mechanism is provided on the second synchronous pulley.

[0014] Preferably, a slider is fixed to the top of the top seat, and the slider is slidably connected to a groove opened at the bottom of the movable frame. The top seat and the movable frame are elastically connected by a third spring. Side strips and vertical strips are respectively provided on both sides of the top seat. The material of the vertical strip is iron. A first side frame is fixed to the side of the top seat near the vertical strip, and a magnetic suction wheel is rotatably installed on the first side frame. The material of the magnetic suction wheel is a permanent magnet. A second side frame is fixed to the side of the top seat near the side strip, and a roller is rotatably installed on the second side frame. The roller abuts against the side wall of the side strip. The top and bottom of the side wall where the side strip abuts against the roller are respectively provided with a vertical surface and an inclined surface. The distance from the top side of the inclined surface to the vertical strip is greater than the distance from the bottom side of the inclined surface to the vertical strip.

[0015] Preferably, the cleaning unit includes a scraping strip that is attached to the bottom surface of the flexible filter screen. The scraping strip is fixed with a fixing frame, and the fixing frame is fixed to the oil collection box.

[0016] Preferably, the oil guide includes an oil receiving cover sleeved on the bottom of the bearing; the oil receiving cover is fixed on the side wall of the inner frame, the bottom of the oil receiving cover is fixedly connected to a connecting pipe, and the bottom of the connecting pipe is fixedly connected to a horizontal pipe, and the horizontal pipe is set inside the top of the oil storage box, the bottom of the horizontal pipe is provided with a plurality of oil outlets evenly distributed along the length direction, and the two ends of the horizontal pipe are fixed with end caps.

[0017] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0018] The positive and progressive effects of this invention are as follows: The aforementioned conveying device for grinding the paint surface of a vehicle utilizes the linear movement of the pallet during the conveying process. It drives the lubrication and oil supply mechanism to complete the oil pumping action through inclined extrusion. After the lubricating oil is evenly pressurized in the annular cavity inside the outer ring of the bearing, it is evenly delivered to the inner raceway of the outer ring through the circumferentially distributed inner holes. This achieves synchronous and sufficient lubrication of all the bearing balls around the circumference, reduces the rolling friction and wear rate, and extends the bearing service life. At the same time, the entire lubrication process does not require additional power source and electronic control components and is automatically triggered with the conveying action of the vehicle body.

[0019] This conveying device collects excess lubricating oil overflowing from the oil guide section below the bearing and then discharges it onto the belt filter section inside the oil storage box, achieving lubricating oil recycling and reducing oil waste. After the recycled oil passes through the belt filter, impurities are effectively trapped, preventing them from re-entering the bearing and causing wear, thus ensuring the cleanliness of the circulating lubricating oil and further reducing the risk of bearing wear.

[0020] This conveying device uses a closed-loop, strip-shaped flexible filter screen as the filter element. Relying on the power of the material tray conveying, the flexible filter screen is driven to make a continuous closed-loop circular motion along its own length after being converted by the power mechanism and the drive unit. With the help of the scraping strips on the bottom side of the filter screen, impurities trapped on its surface can be continuously scraped off during the movement of the filter screen, realizing online self-cleaning during the filtration process. This effectively avoids excessive accumulation of impurities on the filter screen, eliminates the need for frequent manual shutdowns for cleaning and maintenance, ensures long-term stable filtration effect, and is suitable for the continuous operation requirements of automated grinding production lines for complete vehicles.

[0021] The bearing lubrication and oil supply, as well as the filter screen circulation drive in this conveying device, are powered by the linear motion of the material tray during conveying. The direction conversion and unidirectional transmission of power are achieved through inclined plane transmission, friction transmission, and a one-way anti-reverse mechanism. The entire process adopts a purely mechanical structure without any electrical control components. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 This is a side view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the structure of the material tray and roller conveyor of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram of section A in the middle; Figure 5 This is a schematic diagram of the structure inside the side shell of the present invention; Figure 6 This is a schematic diagram of the bottom structure of the oil storage box of the present invention; Figure 7 This is a schematic diagram of the lubrication and oil supply mechanism and the power mechanism of the present invention; Figure 8 This is a schematic diagram of the structure of the movable frame of the present invention; Figure 9 This is a schematic diagram of the structure of the wedge block of the present invention; Figure 10 This is a schematic diagram of the bearing, inner frame, and oil guide of the present invention; Figure 11 This is a schematic diagram of the structure on the outer ring of the present invention; Figure 12 This is a schematic diagram of the outer and inner structure of the oil storage box of the present invention; Figure 13 This is a schematic diagram of the drive unit of the present invention; Figure 14 This is a schematic diagram of the structure of the top of the top seat of the present invention; Figure 15 This is a schematic diagram of the structure of the first synchronous wheel, the second synchronous wheel, and the friction wheel of the present invention; Figure 16 This is a schematic diagram of the structure of the present invention with the top seat in a high position; Figure 17 This is a schematic diagram of the structure of the present invention with the roller in contact with the bottom side of the vertical surface.

[0023] Explanation of reference numerals in the attached figures 1. Frame; 2. Roller conveyor; 201. Support frame; 202. Roller body; 2021. End shaft; 203. Side shell; 2031. Tank; 3. Linear module; 4. Grinding robot; 401. Grinding section; 5. Material tray; 501. First extrusion slope; 6. Pressure block; 601. First pressure slope; 7. Power mechanism; 701. Connecting rod; 702. Wedge block; 7021. Second extrusion slope; 7 03. Movable frame; 7031. Second pressure inclined surface; 704. Guide seat; 705. First spring; 8. Bearing; 801. Outer ring; 8011. Oil inlet; 8012. Cavity; 8013. Inner hole; 9. Inner frame; 10. Lubrication and oil supply mechanism; 1001. Cylinder; 1002. Piston; 1003. Second spring; 1004. Oil inlet check valve; 1005. Oil inlet pipe; 1006. Oil outlet check valve 1007. Oil drain pipe; 11. Oil guide section; 1101. Oil receiving cover; 1102. Connecting pipe; 1103. Horizontal pipe; 1104. End cap; 1105. Oil outlet; 12. Oil reservoir; 1201. Side groove; 13. Flexible filter screen; 1301. Rotary drum; 14. Drive unit; 1401. First synchronous pulley; 1402. Synchronous belt; 1403. Friction wheel; 1404. Friction strip; 1405. Top 1406, First side frame; 1407, Magnetic roller; 1408, Second side frame; 1409, Roller; 1410, Side strip; 14101, Vertical surface; 14102, Inclined surface; 1411, Vertical strip; 1412, Guide frame; 1413, End frame; 1414, Guide post; 1415, Third spring; 1416, Slider; 1417, Second synchronous pulley; 15, Scraper strip; 1501, Fixed frame. Detailed Implementation

[0024] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0025] like Figures 1-17 As shown, the conveying device for grinding the paint surface of a vehicle includes a frame 1; two linear modules 3 are arranged inside the frame 1, and a grinding robot 4 is installed on the linear modules 3; a roller conveyor 2 is arranged between the two linear modules 3.

[0026] The car body workpiece is transported by roller conveyor 2. After the car body moves to the middle position of frame 1, the linear module 3 drives the grinding robot 4 to move to different positions on the car body to perform grinding processing on different positions on the side of the car body.

[0027] Among them, the grinding robot 4 has a grinding part 401 at its end. The grinding part 401 adopts a flexible force-controlled grinding head to ensure that the force between the grinding part 401 and the workpiece remains constant, thereby improving the grinding quality.

[0028] The roller conveyor 2 is provided with two side shells 203 on the top, and a plurality of rollers 202 are provided between the two side shells 203.

[0029] In a specific implementation, a support frame 201 is fixed to the bottom of the side shell 203, and a drive structure, such as a motor, is provided on the support frame 201. The drive structure is connected to the end shaft 2021 of all rollers 202 through a transmission component, driving all rollers 202 to rotate synchronously. When all rollers 202 rotate synchronously, the workpiece is conveyed.

[0030] The transmission component can adopt a bevel gear structure. The end shaft 2021 is connected to a bevel gear, and the drive structure is connected to a long shaft. Multiple bevel gears are set on the long shaft and connected to the bevel gear on the end shaft 2021 to realize synchronous drive of all rollers 202 to rotate.

[0031] A bearing 8 is fixed inside the side shell 203, and the end shaft 2021 located at the end of the roller body 202 is fixed to the inner ring of the bearing 8.

[0032] The outer ring 801 of the bearing 8 is connected to a lubrication mechanism 10, which is used to uniformly supply oil to the inner side of the outer ring 801.

[0033] The lubrication and oil supply mechanism 10 is connected to an oil reservoir 12, and an oil guide part 11 is provided below the bearing 8, with the oil guide part 11 extending into the oil reservoir 12.

[0034] The oil storage box 12 is provided with a closed-loop strip filter section, and the strip filter section is connected to a drive section 14; the drive section 14 is used to drive the strip filter section to perform a closed-loop cyclic motion along its own length direction; a cleaning section is provided on the bottom side of the strip filter section.

[0035] The balls are transported on the vehicle body and then remain on the roller 202. The weight of the balls acts on the roller 202 and is also applied to the bearing 8 through the end shaft 2021. This causes the balls between the inner and outer rings 801 of the bearing 8 to bear a large pressure. When the roller 202 rotates, the rolling friction wear is aggravated due to the pressure. In order to reduce wear, a lubrication mechanism 10 is set up. The lubrication mechanism 10 evenly inputs the lubricating oil in the oil storage box 12 to the inner side of the outer ring 801, so that the balls receive sufficient lubricating oil and avoid the problem of wear on the clamps due to insufficient lubricating oil.

[0036] Excess oil entering the bearing 8 flows downwards and is collected by the oil guide section 11 and guided into the oil reservoir 12, allowing the excess oil to flow back. The oil flowing back into the oil reservoir 12 is filtered by the belt filter section to prevent excessive impurities in the oil from affecting subsequent lubrication.

[0037] The drive unit 14, in conjunction with the cleaning unit, enables the cyclic cleaning of the strip filter section, ensuring its filtration efficiency and preventing clogging or accumulation of foreign matter. Specifically, the drive unit 14 drives the strip filter section to perform a closed-loop circular motion along its length, allowing each section of the strip filter section to pass through the cleaning unit for cleaning.

[0038] like Figure 5 and Figure 7 As shown, the lubrication and oil supply mechanism 10 includes a cylinder 1001 fixedly installed inside the side shell 203; a piston 1002 is fitted inside the cylinder 1001, a pressure block 6 is fixed on one side of the piston 1002, and the other side of the piston 1002 is elastically connected to the inner wall of the cylinder 1001 through a second spring 1003. An oil inlet check valve 1004 and an oil outlet check valve 1006 are installed at the end of the cylinder 1001 away from the pressure block 6. The oil inlet check valve 1004 is connected to the bottom of the oil storage box 12 through an oil inlet pipe 1005. The oil storage box 12 is connected to an oil outlet pipe 1007, and the oil outlet pipe 1007 is connected to an oil inlet 8011 provided on the outer ring 801.

[0039] like Figures 3-5 As shown, the pressure block 6 extends to the side shell 203 near the roller body 202, and the end of the pressure block 6 away from the piston 1002 is provided with a first pressure inclined surface 601; it also includes a material tray 5 for carrying the vehicle body; one side of the material tray 5 is provided with a first extrusion inclined surface 501 for extruding the first pressure inclined surface 601.

[0040] like Figure 5 , Figure 10 as well as Figure 11 As shown, the outer ring 801 is fixed with an inner frame 9, and the inner frame 9 is fixed inside the side shell 203. The outer ring 801 has an annular cavity 8012 inside its wall, and the cavity 8012 is connected to the oil inlet 8011. The outer ring 801 has a plurality of inner holes 8013 arranged in an annular array on its inner side, and the inner holes 8013 are connected to the cavity 8012.

[0041] When the car body is being processed, the car body is placed on the material tray 5, the material tray 5 is placed on the roller 202, and the roller conveyor 2 transports the material tray 5 to realize the transport of the car body.

[0042] During the conveying process, the material tray 5 passes by the side of the side shell 203. The material tray 5 is pressed by the first extrusion inclined surface 501 on it, which in turn presses the first pressure inclined surface 601, causing the pressure block 6 to move into the cylinder 1001. The pressure block 6 drives the piston 1002 to move and compress the second spring 1003. The piston 1002 pushes the oil in the cylinder 1001, causing the oil to enter the oil drain pipe 1007 through the oil drain check valve 1006, and then enter the cavity 8012 through the oil inlet 8011. Finally, it is evenly distributed to the inner side of the outer ring 801 through multiple inner holes 8013, so as to evenly supply oil to the balls in the inner side of the outer ring 801.

[0043] As the material tray 5 continues to be conveyed and moves away from the pressure block 6, the pressure block 6 loses the pressure of the material tray 5. The piston 1002 and the pressure block 6 are reset by the elastic force of the second spring 1003. The cylinder 1001 then draws in oil. The oil in the oil storage box 12 enters the cylinder 1001 through the oil inlet pipe 1005 and the oil inlet check valve 1004, replenishing the cylinder 1001 with oil for the next lubrication.

[0044] Through the above design, automatic lubrication is achieved. The lubrication and oil supply mechanism 10 obtains power by squeezing the pressure block 6 when the material tray 5 moves. The lubrication and oil supply mechanism 10 itself does not need to be equipped with an additional power source or control element.

[0045] like Figures 5-9 As shown, it also includes a power mechanism 7, which includes a connecting rod 701. The connecting rod 701 is fixed to one side of the pressure block 6, and a wedge block 702 is fixed to the connecting rod 701. The wedge block 702 is located inside the side shell 203. A movable frame 703 is provided at the bottom of the wedge block 702. A second extrusion inclined surface 7021 and a second pressure inclined surface 7031 are respectively provided on the bottom surface of the wedge block 702 and the top surface of the movable frame 703. The second extrusion inclined surface 7021 and the second pressure inclined surface 7031 are in contact with each other. A guide seat 704 is fixed inside the side shell 203. The guide seat 704 is slidably sleeved with the movable frame 703. The movable frame 703 is elastically connected to the bottom inner wall of the side shell 203 through a second spring 1003. The bottom end of the movable frame 703 is connected to the power input end of the drive unit 14.

[0046] The power mechanism 7 is connected to the pressure block 6. When the pressure block 6 moves, it drives the wedge block 702 to move together through the connecting rod 701. During the process of the pressure block 6 being squeezed by the material tray 5 and moving into the side shell 203, the wedge block 702 moves together with the pressure block 6. The wedge block 702 squeezes the second pressure inclined surface 7031 of the movable frame 703 through the second extrusion inclined surface 7021, causing the movable frame 703 to move downward and compress the first spring 705. During the process of the pressure block 6 separating from the material tray 5 and moving the pressure block 6 outward from the side shell 203, the wedge block 702 moves back to its original position along with the pressure block 6. The movable frame 703 moves back to its original position upward by the elastic force of the first spring 705.

[0047] The vertical movement of the movable frame 703 provides power to the drive unit 14. At the same time, the power of the power mechanism 7 comes from the movement of the pressure block 6, so that the drive unit 14 does not need to be connected to an additional power source for driving, and no additional control element is needed for control.

[0048] like Figure 4 and Figure 7 As shown, the side shell 203 has a groove 2031 on the side near the roller body 202, and the groove 2031 is used for the pressure block 6 and the connecting rod 701 to pass through.

[0049] like Figure 6 and Figure 12 As shown, the strip filter section includes a strip-shaped flexible filter screen 13. A side groove 1201 is provided on both sides of the oil storage box 12. The top of the flexible filter screen 13 passes through the side groove 1201, and the bottom of the flexible filter screen 13 is located at the bottom of the oil storage box 12. A rotating cylinder 1301 is provided on the outer side of the two side grooves 1201 and on both sides of the bottom of the oil storage box 12. The four rotating cylinders 1301 are rotatably mounted on the side wall of the oil storage box 12. The flexible filter screen 13 is wound around the four rotating cylinders 1301. One end of the rotating cylinder 1301 is connected to the power output end of the drive unit 14.

[0050] like Figures 13-17 As shown, the drive unit 14 includes a first synchronous pulley 1401 and a second synchronous pulley 1417. The first synchronous pulley 1401 is fixed to one end of the rotating drum 1301. The second synchronous pulley 1417 is rotatably mounted on the outer wall of the oil storage box 12. A synchronous belt 1402 is wound between the first synchronous pulley 1401 and the second synchronous pulley 1417. A friction wheel 1403 is coaxially fixed to the second synchronous pulley 1417. A friction strip 1404 is provided on one side of the friction wheel 1403, and a top seat 1405 is provided on the top of the friction strip 1404. The top seat 1405 is connected to the bottom of the movable frame 703. A one-way anti-reverse mechanism is provided on the second synchronous pulley 1417. The one-way anti-reverse mechanism is preferably a ratchet and pawl structure.

[0051] The drive unit 14 drives the rotating drum 1301 to rotate, thereby causing the flexible filter screen 13 to perform a closed-loop circular motion. Specifically, when the movable frame 703 drives the top seat 1405 and friction strip 1404 to move downward, the friction strip 1404 rubs against the friction wheel 1403, driving the friction wheel 1403 and the second synchronous pulley 1417 to rotate. Then, through the belt drive of the synchronous belt 1402, the first synchronous pulley 1401 and the rotating drum 1301 rotate, thereby driving the flexible filter screen 13.

[0052] When the movable frame 703 drives the top seat 1405 and friction strip 1404 to move upward, the friction wheel 1403 cannot rotate in the opposite direction due to the one-way locking provided by the one-way anti-reverse mechanism to the second synchronous wheel 1417, and the rotating drum 1301 also does not rotate in the opposite direction, thus preventing the flexible filter screen 13 from moving in the opposite direction.

[0053] Multiple pallets 5 carry the vehicle body across the roller conveyor 2. The movable frame 703 drives the top seat 1405 and friction strip 1404 to move up and down repeatedly, so that the flexible filter screen 13 continuously performs closed-loop circulation.

[0054] In practical implementation, when the friction strip 1404 moves upward, it does not drive the friction wheel 1403 to rotate in the opposite direction. It only drives the friction wheel 1403 to rotate when the friction strip 1404 moves downward. As a result, when the friction strip 1404 moves upward, it will have ineffective friction with the friction wheel 1403. In order to avoid unnecessary wear caused by ineffective friction between the friction strip 1404 and the friction wheel 1403, the following improvements are made.

[0055] A slider 1416 is fixed to the top of the top seat 1405, and the slider 1416 is slidably connected to a groove formed at the bottom of the movable frame 703. The top seat 1405 and the movable frame 703 are elastically connected by a third spring 1415. Side strips 1410 and vertical strips 1411 are respectively provided on both sides of the top seat 1405. The vertical strips 1411 are made of iron. A first side frame 1406 is fixed to the side of the top seat 1405 near the vertical strips 1411, and a magnetic pull wheel 1407 is rotatably mounted on the first side frame 1406. The suction wheel 1407 is made of permanent magnet. The top seat 1405 is fixed with a second side frame 1408 on the side near the side strip 1410. The second side frame 1408 is rotatably mounted with a roller 1409. The roller 1409 abuts against the side wall of the side strip 1410. The top and bottom of the side wall where the side strip 1410 abuts the roller 1409 are respectively provided with a vertical surface 14101 and an inclined surface 14102. The distance from the top side of the inclined surface 14102 to the vertical strip 1411 is greater than the distance from the bottom side of the inclined surface 14102 to the vertical strip 1411.

[0056] An end frame 1413 is fixed on the bottom side wall of the movable frame 703. A guide post 1414 is fixed on the end frame 1413. The guide post 1414 is slidably sleeved with a guide frame 1412 fixed at the top of the top seat 1405. A third spring 1415 is sleeved on the guide post 1414, and both ends of the third spring 1415 abut against the end frame 1413 and the guide frame 1412 respectively.

[0057] like Figure 13 , Figure 14 and Figure 16 As shown, at this time, the movable frame 703 is in a high position, the friction strip 1404 and the friction wheel 1403 are in contact, and the roller 1409 is in contact with the top side of the vertical surface 14101. When the movable frame 703 drives the top seat 1405 and the friction strip 1404 to move downward, the friction strip 1404 rubs against the friction wheel 1403, driving the friction wheel 1403 to rotate, while the roller 1409 moves on the vertical surface 14101. After the roller 1409 moves to the bottom side of the vertical surface 14101, as shown... Figure 17 As shown, the friction strip 1404 separates from the friction wheel 1403, and the top seat 1405 and the friction strip 1404 continue to move downward. The roller 1409 moves from the vertical surface 14101 to the inclined surface 14102, and from the top side of the inclined surface 14102 to the bottom side of the inclined surface 14102. The roller 1409 is squeezed by the inclined surface 14102, which causes the top seat 1405 to drive the friction strip 1404 closer to the vertical strip 1411. The friction strip 1404 moves away from the friction wheel 1403. The magnetic suction wheel 1407 on one side of the top seat 1405 is attached to the vertical strip 1411. A magnetic connection is established between the magnetic suction wheel 1407 and the vertical strip 1411, and the third spring 1415 is compressed.

[0058] When the movable frame 703 moves the top seat 1405 and friction strip 1404 upward to reset, the magnetic roller 1407 and the vertical strip 1411 remain magnetically connected, and there is no friction between the friction strip 1404 and the friction roller 1403. Until the magnetic roller 1407 moves to the top side of the vertical strip 1411, the magnetic roller 1407 separates from the vertical strip 1411, the magnetic connection is released, and the elastic force of the third spring 1415 causes the top seat 1405 to move closer to the side strip 1410, the roller 1409 is in contact with the top side of the vertical surface 14101, and the friction strip 1404 and the friction roller 1403 are re-in contact.

[0059] With the above design, when the friction strip 1404 moves downward, the friction strip 1404 and the friction wheel 1403 are in contact. When the friction strip 1404 moves upward to reset, the friction strip 1404 and the friction wheel 1403 are separated, thus avoiding unnecessary friction between the friction strip 1404 and the friction wheel 1403 and reducing wear.

[0060] like Figure 12As shown, the cleaning unit includes a scraper 15, which is attached to the bottom surface of the flexible filter screen 13. The scraper 15 is fixed with a fixing frame 1501, and the fixing frame 1501 is fixed to the oil collection box 12.

[0061] When the flexible filter screen 13 makes a closed loop along its own length, it passes by the scraper strip 15 and scrapes off the foreign matter attached to it.

[0062] In practice, the cleaning department can use a rinsing structure to achieve cleaning through rinsing.

[0063] The flexible filter 13 is made of polyamide (nylon PA).

[0064] like Figure 10 and Figure 12 As shown, the oil guide part 11 includes an oil receiving cover 1101 sleeved on the bottom of the bearing 8; the oil receiving cover 1101 is fixed on the side wall of the inner frame 9, the bottom of the oil receiving cover 1101 is fixedly connected to a connecting pipe 1102, and the bottom of the connecting pipe 1102 is fixedly connected to a horizontal pipe 1103, and the horizontal pipe 1103 is arranged inside the top of the oil storage box 12. The bottom of the horizontal pipe 1103 is provided with a plurality of oil outlets 1105 evenly distributed along the length direction, and the two ends of the horizontal pipe 1103 are fixed with end caps 1104.

[0065] Excess oil in bearing 8 flows downward and is collected by oil collection cover 1101. It then enters horizontal pipe 1103 through connecting pipe 1102 and is discharged to flexible filter screen 13 through oil outlet 1105. After being filtered by flexible filter screen 13, it is stored in oil storage box 12.

[0066] This invention is not limited to the embodiments described above. Any changes made to their shape or structure fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications fall within the protection scope of this invention.

Claims

1. A conveying device for grinding the paint surface of a vehicle, comprising a frame (1); two linear modules (3) are arranged inside the frame (1), and a grinding robot (4) is mounted on the linear modules (3); characterized in that: A roller conveyor (2) is provided between the two linear modules (3); The roller conveyor (2) has two side shells (203) on top, and multiple rollers (202) are arranged between the two side shells (203). A bearing (8) is fixed inside the side shell (203), and the end shaft (2021) located at the end of the roller body (202) is fixed to the inner ring of the bearing (8); The outer ring (801) of the bearing (8) is connected to a lubrication supply mechanism (10), which is used to uniformly supply oil to the inner side of the outer ring (801); The lubrication and oil supply mechanism (10) is connected to an oil reservoir (12), and an oil guide (11) is provided below the bearing (8), with the oil guide (11) extending into the oil reservoir (12); The oil storage box (12) is provided with a closed ring-shaped strip filter section, and the strip filter section is connected to a drive section (14); the drive section (14) is used to drive the strip filter section to make a closed ring-shaped cyclic motion along its own length direction; a cleaning section is provided on the bottom side of the strip filter section.

2. The conveying device for grinding the paint surface of a vehicle as described in claim 1, characterized in that: The lubrication and oil supply mechanism (10) includes a cylinder (1001) fixedly installed inside the side shell (203); a piston (1002) is fitted inside the cylinder (1001), a pressure block (6) is fixed on one side of the piston (1002), and the other side of the piston (1002) is elastically connected to the inner wall of the cylinder (1001) through a second spring (1003). An oil inlet check valve (1004) and an oil outlet check valve (1006) are installed at the end of the cylinder (1001) away from the pressure block (6). The oil inlet check valve (1004) is connected to the bottom of the oil storage box (12) through an oil inlet pipe (1005). The oil storage box (12) is connected to an oil outlet pipe (1007), and the oil outlet pipe (1007) is connected to an oil inlet (8011) provided on the outer ring (801).

3. The conveying device for grinding the paint surface of a vehicle as described in claim 2, characterized in that: The pressure block (6) extends to the side shell (203) near the roller (202), and a first pressure inclined surface (601) is provided at the end of the pressure block (6) away from the piston (1002); it also includes a material tray (5) for carrying the vehicle body; a first extrusion inclined surface (501) for extruding the first pressure inclined surface (601) is provided on one side of the material tray (5).

4. The conveying device for grinding the paint surface of a vehicle as described in claim 2, characterized in that: The outer ring (801) is fixed with an inner frame (9), and the inner frame (9) is fixed inside the side shell (203). The outer ring (801) has a circular cavity (8012) inside its wall. The cavity (8012) is connected to the oil inlet (8011). The outer ring (801) has a plurality of inner holes (8013) arranged in a ring array on its inner side, and the inner holes (8013) are connected to the cavity (8012).

5. The conveying device for grinding the paint surface of a vehicle as described in claim 3, characterized in that: It also includes a power mechanism (7), which includes a connecting rod (701); the connecting rod (701) is fixed to one side of the pressure block (6), and the connecting rod (701) is fixed with a wedge block (702). The bottom of the wedge block (702) is provided with a movable frame (703). The bottom surface of the wedge block (702) and the top surface of the movable frame (703) are respectively provided with a second extrusion inclined surface (7021) and a second pressure inclined surface (7031), and the second extrusion inclined surface (7021) and the second pressure inclined surface (7031) are in contact with each other. A guide seat (704) is fixed inside the side shell (203). The guide seat (704) is slidably sleeved with the movable frame (703), and the movable frame (703) is elastically connected to the bottom inner wall of the side shell (203) through a second spring (1003). The bottom end of the movable frame (703) is connected to the power input end of the drive unit (14).

6. The conveying device for grinding the paint surface of a vehicle as described in claim 5, characterized in that: The strip filter section includes a strip of flexible filter screen (13). A side groove (1201) is provided on both sides of the oil storage box (12). The top of the flexible filter screen (13) passes through the side groove (1201), and the bottom of the flexible filter screen (13) is located at the bottom of the oil storage box (12). A rotating cylinder (1301) is provided on the outside of the two side grooves (1201) and on both sides of the bottom of the oil storage box (12). The four rotating cylinders (1301) are rotatably installed on the side wall of the oil storage box (12). The flexible filter screen (13) is wound around the four rotating cylinders (1301). One end of the rotating cylinder (1301) is connected to the power output end of the drive unit (14).

7. The conveying device for grinding the paint surface of a vehicle as described in claim 6, characterized in that: The drive unit (14) includes a first synchronous pulley (1401) and a second synchronous pulley (1417). The first synchronous pulley (1401) is fixed to one end of the rotating drum (1301). The second synchronous pulley (1417) is rotatably mounted on the outer wall of the oil storage box (12). A synchronous belt (1402) is wound between the first synchronous pulley (1401) and the second synchronous pulley (1417). A friction wheel (1403) is coaxially fixed to the second synchronous pulley (1417). A friction strip (1404) is provided on one side of the friction wheel (1403), and a top seat (1405) is provided on the top of the friction strip (1404). The top seat (1405) is connected to the bottom of the movable frame (703). A one-way anti-reverse mechanism is provided on the second synchronous pulley (1417).

8. The conveying device for grinding the paint surface of a vehicle as described in claim 7, characterized in that: A slider (1416) is fixed to the top of the top seat (1405), and the slider (1416) is slidably connected to a groove opened at the bottom of the movable frame (703). The top seat (1405) and the movable frame (703) are elastically connected by a third spring (1415). Side strips (1410) and vertical strips (1411) are respectively provided on both sides of the top seat (1405). The material of the vertical strip (1411) is iron. A first side frame (1406) is fixed on the side of the top seat (1405) near the vertical strip (1411), and a magnetic wheel (1407) is rotatably mounted on the first side frame (1406). The suction wheel (1407) is made of permanent magnet. The top seat (1405) is fixed with a second side frame (1408) on the side near the side strip (1410). The second side frame (1408) is rotatably mounted with a roller (1409). The roller (1409) abuts against the side wall of the side strip (1410). The top and bottom of the side wall where the side strip (1410) abuts the roller (1409) are respectively provided with a vertical surface (14101) and an inclined surface (14102). The distance from the top side of the inclined surface (14102) to the vertical strip (1411) is greater than the distance from the bottom side of the inclined surface (14102) to the vertical strip (1411).

9. The conveying device for grinding the paint surface of a vehicle as described in claim 1, characterized in that: The cleaning unit includes a scraper (15) that is attached to the bottom surface of a flexible filter screen (13). The scraper (15) is fixed with a bracket (1501), and the bracket (1501) is fixed to the oil collection box (12).

10. The conveying device for grinding the paint surface of a vehicle as described in claim 4, characterized in that: The oil guide part (11) includes an oil receiving cover (1101) sleeved on the bottom of the bearing (8); the oil receiving cover (1101) is fixed on the side wall of the inner frame (9), the bottom of the oil receiving cover (1101) is fixedly connected to a connecting pipe (1102), and the bottom of the connecting pipe (1102) is fixedly connected to a horizontal pipe (1103), and the horizontal pipe (1103) is located inside the top of the oil storage box (12), the bottom of the horizontal pipe (1103) is provided with a plurality of equally spaced oil outlets (1105) along the length direction, and the two ends of the horizontal pipe (1103) are fixed with end caps (1104).

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