A vehicle frame weld joint grinding apparatus with floating grinding head

Abstract

The present application relates to the field of frame polishing, in particular to a frame welding seam polishing equipment with a floating grinding head, comprising a polishing frame body, an annular moving frame is slidably connected to the polishing frame body, a floating grinding head is slidably connected to the annular moving frame, a lifting frame is slidably connected to the bottom of the polishing frame body, and the lifting frame and the side surface of the polishing frame body form a mounting plane. The polishing frame body is moved to the lower side of the frame by a pushing assembly, which drives the two sides of the long plate to move synchronously to the middle part to position the center, and the pushing assembly synchronously drives the clamping plate to slide downward, so that the plastic friction plate is tightly clamped on the surface of the frame to complete the clamping and fixing. Then the floating grinding head surrounds the frame along the annular moving frame to polish the welding seam. The frame is suspended on the conveying line to move while polishing, which improves the production efficiency.

Description

Technical Field

[0001] This invention relates to the field of vehicle frame grinding, specifically to a vehicle frame weld grinding device equipped with a floating grinding head. Background Technology

[0002] During the manufacturing process of the vehicle frame, grinding is required after welding to ensure surface flatness. This is a key process to ensure the structural strength of the frame and the quality of subsequent painting.

[0003] Currently, in automated production line operations, the entire vehicle frame is typically suspended continuously on the conveyor line via a hanging or supporting device to facilitate transfer between workstations. However, due to the structural layout and processing methods of existing grinding equipment, when the vehicle frame is transferred to the grinding station, it must first be removed from the continuous conveyor line by lifting equipment or manual assistance. It is then transferred and positioned on a dedicated fixed grinding table or robotic grinding workstation for offline processing. After all grinding processes are completed, the vehicle frame is then lifted back onto the conveyor line to enter the next production stage. This intermittent operation mode, which requires the vehicle frame to be "offline" before grinding, directly disrupts the continuous flow rhythm of the entire production line. Due to the large size and heavy weight of the vehicle frame, the repeated lifting and clamping not only consumes a large amount of auxiliary time, resulting in a significant reduction in production efficiency, but also increases the risk of bumps and injuries and the intensity of manual labor due to frequent transfers. This bottleneck of relying on "offline grinding" has seriously reduced the production efficiency of vehicle frames.

[0004] To address this, a chassis weld grinding device with a floating grinding head is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a chassis weld grinding device with a floating grinding head to solve the problem that relying on offline grinding processes has seriously reduced the efficiency of chassis production and processing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A grinding device for vehicle frame welds with a floating grinding head includes a grinding frame body. An annular movable frame is slidably connected to the grinding frame body, and a floating grinding head is slidably connected to the annular movable frame. A lifting frame is slidably connected to the bottom of the grinding frame body, and the lifting frame forms a mounting plane with one side surface of the grinding frame body. An electric telescopic rod is fixedly mounted on the grinding frame body, and the movable end of the electric telescopic rod is fixedly mounted to the lifting frame. Two symmetrically arranged centering plates are slidably connected to the mounting plane, and a mounting frame is fixedly mounted on the centering plates. A clamping plate is slidably connected within the mounting frame, and a groove is formed at the bottom of the clamping plate. A plastic friction pad is fixedly mounted within the groove. A pushing assembly is mounted on the grinding frame body and connected to the lifting frame. When the electric telescopic rod pushes the lifting frame to move, the pushing assembly causes the two centering plates to move closer together and pushes the clamping plate downwards.

[0007] During the chassis manufacturing process, the entire chassis is suspended on a continuous conveyor line. Using existing equipment for grinding requires removing the chassis and placing it on the grinding equipment, significantly reducing production efficiency. Therefore, this invention uses a movable grinding device that performs grinding while the chassis is suspended and moving on the conveyor line, improving production efficiency. In practical use, the grinding frame is installed at a suitable position on the side of the conveyor line. After the conveyor line moves the suspended chassis to the grinding area, it pushes the grinding frame to the side of the chassis. Below the frame, the electric telescopic rod is activated to push the lifting frame upward. During the movement of the lifting frame, the pushing component drives the centering plates on both sides to move towards the center simultaneously, aligning and positioning the frame. At the same time, the pushing component drives the clamping plate to slide downward along the mounting frame, so that the plastic friction pad is pressed against the surface of the frame to complete the clamping and fixing. Then, the floating grinding head adjusts its position along the annular moving frame and moves around the frame along the annular moving frame to grind the welds of the frame. During the grinding process, the floating grinding head can adaptively conform to the undulations of the weld surface to ensure the smoothness of the grinding.

[0008] Preferably, the pushing assembly includes a support frame fixedly mounted on the grinding frame body, a spring telescopic rod slidably connected to the support frame, one side of the centering long plate being fixedly mounted to the movable end of the spring telescopic rod, and the two centering long plates being inclined towards the middle as a whole, a ball bearing being fixedly mounted on the fixed end of the spring telescopic rod, two symmetrically arranged pushing plates being fixedly mounted on the lifting frame, the pushing plates being bent in shape as a whole, a connector being mounted on the grinding frame body, the connector being connected to the clamping plate, when the pushing plate moves to a designated position, the pushing plate pushes the spring telescopic rod to the designated position, and pushes the clamping plate downward through the connector.

[0009] Specifically, after the frame is placed on the grinding frame, the electric telescopic rod is activated to push the lifting frame upward. During the upward movement of the lifting frame, it will drive the two bent push plates to move upward synchronously. As the push plates move upward, they will gradually compress the ball bearings. Since the two push plates are tilted towards the center, the ball bearings are compressed and move towards the center. The two centering plates move closer to each other synchronously under the action of the spring telescopic rod, completing the centering and positioning of the frame. After the centering plates have completed the centering movement, the floating grinding head can be moved along the weld seam path of the frame by the annular moving frame to complete the weld seam grinding operation. The floating grinding head can adapt to the slight positional deviation of the weld seam, improving the fit and grinding quality of the grinding.

[0010] Preferably, the connecting member includes a swing plate rotatably connected to the grinding frame body, a first roller rotatably connected to the push plate, a moving block slidably connected to the mounting frame, a clamping plate slidably connected to the bottom of the moving block, guide grooves on both sides of the mounting frame, rollers mounted on the clamping plate slidably connected in the guide grooves, a second roller mounted on one side of the moving block, the first roller pushing the swing plate to abut against the second roller, the distance between the first roller and the central axis of the swing plate being A, the distance between the second roller and the central axis of the swing plate being B, and A being greater than B.

[0011] In practical use, after the frame to be polished is placed on the polishing frame body, the electric telescopic rod is activated to push the lifting frame upward, which in turn drives the two bent push plates to move upward simultaneously. The push plates push the two clamping plates to clamp the frame. At this time, the lifting frame drives the push plates to continue to move upward, so that one end of the first roller abuts against the swing plate. The first roller pushes the swing plate to deflect around the rotation center. The other end of the deflected swing plate will push the second roller, causing the moving block to move to one side. Because the mounting frame has guide grooves on both sides, and rollers mounted on the clamping plate are slidably connected in the guide grooves, and the clamping plate is slidably connected to the bottom of the moving block, the clamping plate will continuously move downward to abut against the frame for fixation when the moving block moves. Of course, the distance between the first roller and the central axis of the swing plate is greater than the distance between the second roller and the central axis of the swing plate, ensuring that the first roller can easily push the second roller to move through the swing plate. At the same time, the plastic friction pad can be adapted to frames with different surface flatness to avoid scratching the paint surface of the frame during clamping.

[0012] Preferably, a first rack is fixedly installed on the push plate, a rotating gear is rotatably connected to the grinding frame body, the first rack meshes with the rotating gear, and a second rack is fixedly installed on the annular moving frame, the second rack meshes with the rotating gear.

[0013] When the lower lifting frame begins to move upward, its top directly pushes the connected push plate, causing the push plate to move upward as well. During its ascent, the push plate drives the first rack fixed to its upper surface to move upward as well. The first rack meshes with a rotating gear, so when the first rack moves upward, it drives the rotating gear to rotate. The rotation of the rotating gear then drives the second rack, which meshes with the other side, to move downward in the opposite direction. The second rack is fixedly mounted on the annular moving frame, so its downward movement directly drives the entire annular moving frame downward. Through this series of linkages, the floating grinding head fixed on the annular moving frame can quickly and accurately descend to the preset processing position, thus immediately beginning the grinding process on the workpiece and ensuring the overall processing efficiency of the equipment.

[0014] Preferably, the mounting plane is inclined in the whole, and the inclination direction is upward, and the angle between the mounting plane and the vertical direction is greater than 5° and less than 15°.

[0015] Most existing chassis weld grinding equipment uses a fixed structure for grinding operations. When grinding workpieces with uneven weld surfaces, the workpiece to be ground needs to be placed on the grinding equipment, causing continuous production interruptions and resulting in low processing efficiency. Therefore, a movable mounting plane can be used to perform grinding while the workpiece is moving. The mounting plane is tilted upwards, allowing the lifted chassis to tilt to one side and lean against the mounting plane, ensuring that the chassis is firmly mounted on the grinding frame. Of course, the angle between the mounting plane and the vertical direction is greater than 5° to ensure that the chassis can lean completely against the mounting plane after tilting, ensuring the stability of the chassis installation. The angle between the mounting plane and the vertical direction should not exceed 15° to avoid the chassis from violently colliding with the grinding frame due to excessive tilt angle after tilting to one side, which would reduce the lifespan of the equipment over long-term use.

[0016] Preferably, a grinding plate is slidably connected inside the mounting frame, a telescopic rod is installed on the grinding frame body, a long tube is fixedly installed on the movable end of the telescopic rod, long rods are slidably connected to both sides of the long tube, the long rods on both sides are fixedly installed on the grinding plate, and a compression spring is sleeved on the telescopic rod.

[0017] It should be noted that plastic friction pads will experience some wear during prolonged compression and friction. Using plastic friction pads reduces wear on the frame, ensuring that only the plastic friction pads are worn. However, since the two plastic friction pads are located on opposite sides, the wear on each side may be uneven. Over time, this can lead to a situation where one side's friction pad is fully secured to the frame while the other side is merely pressing against it, resulting in incomplete frame fixation. Therefore, it's crucial to ensure that the friction on both sides is even. Use grinding pads on both sides to grind the plastic friction pads, ensuring their relative positions are equidistant. Specific steps should be taken... During use, the grinding plate slides along the working surface of the plastic friction pad, grinding away worn, thickened, or unevenly thickened areas. During this process, the compression spring continuously provides a restoring buffer force to the telescopic rod, ensuring stable grinding pressure. The two grinding plates are connected by a long tube and rod, and the telescopic rod allows the grinding plates to move only back and forth, ensuring equal movement on both sides. When one side of the plastic friction pad is thicker than the other, the grinding plate applies a certain force to rub the thicker side, maintaining consistent thickness and ensuring the stability of the frame.

[0018] Preferably, the grinding frame body includes a push frame and a long plate. The push frame is generally L-shaped, the long plate is fixedly installed on one vertical side of the push frame, and multiple casters are installed at the bottom of the push frame.

[0019] The ingenious design of the casters greatly enhances the flexibility and portability of the entire grinding frame, enabling the equipment to move easily and efficiently between positions and workstations. Meanwhile, its scientifically designed L-shaped mounting frame structure not only possesses excellent structural stability but also provides a solid and reliable mounting foundation and support platform for the clamping floating mechanism and precision grinding mechanism. This ensures the stability and precision of the equipment during operation, allowing the entire frame to rest stably against the grinding frame for grinding. This enables more efficient and labor-saving equipment transfer and positioning in various scenarios, comprehensively improving the overall ease of use and operational efficiency of the equipment.

[0020] Preferably, the bottom of the lifting frame is rotatably connected to a limiting plate, and a torsion spring is installed at the rotatable connection. When the lifting frame moves the limiting plate to a designated position, the limiting plate vertically abuts against the bottom of the vehicle frame. When the lifting frame continues to move, the limiting plate flips to an angle perpendicular to the mounting plane.

[0021] The entire frame is suspended on a continuous conveyor line. As the lifting frame moves upward, driven by an electric telescopic rod, it pushes the limiting plate upward until it contacts and supports the bottom of the frame. As the lifting frame continues to rise, the limiting plate, under the weight of the frame itself, begins to flip downward. However, this flipping process is not indefinite—the limiting plate stops rotating when it reaches a specific angle perpendicular to the mounting plane. Through this ingenious swing mechanism, the bottom of the frame rests smoothly against the lower limiting plate and then smoothly flips onto the mounting plane, ensuring a complete and tight fit between the entire frame and the mounting plane. This guarantees the accuracy and stability of the subsequent grinding process. Of course, a torsion spring allows the limiting plate to rotate back to its original position.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Move the grinding frame body to the bottom of the vehicle frame. The electric telescopic rod is activated to push the lifting frame upward. The lifting frame drives the two centering plates on both sides to move towards the center for centering and positioning through the pushing component. At the same time, the pushing component drives the clamping plate to slide downward, so that the plastic friction pad is pressed against the surface of the vehicle frame to complete the clamping and fixing. Then, the floating grinding head moves around the vehicle frame along the annular moving frame to grind the weld seam. Grinding is carried out while the vehicle frame is suspended on the conveyor line and moves, which improves production efficiency.

[0023] 2. The two bent push plates move upward synchronously, pushing the two clamping plates to clamp the frame. At this time, the lifting frame drives the push plates to continue moving upward, pushing the swing plate to deflect around the rotation center through the first roller. The other end of the deflected swing plate will push the second roller, causing the moving block to move to one side. When the moving block moves, the clamping plate will continuously move downward to abut against the frame for fixation, ensuring the accuracy of the grinding frame body during grinding and polishing, and indirectly improving production efficiency.

[0024] 3. The mounting plane is set at an angle so that the lifted frame can tilt to one side and lean against the mounting plane, ensuring that the frame can be firmly installed on the grinding frame body. Of course, the angle between the mounting plane and the vertical direction is greater than 5° to ensure that the frame can lean completely against the mounting plane after tilting, ensuring the stability of the frame installation. The angle between the mounting plane and the vertical direction should not be greater than 15° to avoid the frame from tilting to one side and causing a violent collision with the grinding frame body, which would reduce the lifespan of the equipment in the long term. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a side view of the grinding frame body in this invention. Figure 3This is a schematic diagram of the rear structure of the long plate in this invention; Figure 4 This is a schematic diagram of the structure of the medium-length plate in this invention; Figure 5 This is a three-dimensional structural diagram of the medium-length plate in this invention; Figure 6 This is a schematic diagram of the mounting bracket in this invention; Figure 7 This is a schematic diagram of the torsion spring in this invention.

[0026] In the diagram: 1. Grinding frame body; 101. Pushing frame; 102. Mounting plane; 2. Long plate; 3. Circular moving frame; 4. Floating grinding head; 5. Lifting frame; 6. Limiting plate; 7. Centering long plate; 8. Mounting frame; 9. Electric telescopic rod; 10. Guide groove; 11. Second rack; 12. First rack; 13. Rotating gear; 15. Long tube; 16. Long rod; 17. Grinding plate; 18. Pushing plate; 19. Support frame; 20. Spring telescopic rod; 21. Ball bearing; 22. Clamping plate; 23. Torsion spring; 24. First roller; 25. Swinging plate; 26. Second roller; 27. Moving block; 28. Plastic friction plate; 29. ​​Roller; 30. Telescopic rod; 31. Compression spring. Detailed Implementation

[0027] Please see Figures 1 to 7 This invention provides a chassis weld grinding device with a floating grinding head, the technical solution of which is as follows: A grinding device for vehicle frame welds with a floating grinding head includes a grinding frame body 1. An annular movable frame 3 is slidably connected to the grinding frame body 1, and a floating grinding head 4 is slidably connected to the annular movable frame 3. A lifting frame 5 is slidably connected to the bottom of the grinding frame body 1. The lifting frame 5 and one side surface of the grinding frame body 1 form a mounting plane 102. An electric telescopic rod 9 is fixedly mounted on the grinding frame body 1, and the movable end of the electric telescopic rod 9 is fixedly mounted to the lifting frame 5. The mounting plane 102... The sliding connection has two symmetrically arranged centering plates 7, and a mounting bracket 8 is fixedly installed on the centering plates 7. A clamping plate 22 is slidably connected in the mounting bracket 8. The bottom of the clamping plate 22 has a groove, and a plastic friction plate 28 is fixedly installed in the groove. A pushing component is installed on the grinding frame body 1. The pushing component is connected to the lifting frame 5. When the electric telescopic rod 9 pushes the lifting frame 5 to move, the pushing component drives the two centering plates 7 to move closer to each other and drives the clamping plate 22 to move downward.

[0028] The pushing assembly includes a support frame 19 fixedly installed on the grinding frame body 1. A spring telescopic rod 20 is slidably connected to the support frame 19. One side of the centering long plate 7 is fixedly installed to the movable end of the spring telescopic rod 20, and the two centering long plates 7 are inclined towards the middle as a whole. A ball bearing 21 is fixedly installed on the fixed end of the spring telescopic rod 20. Two symmetrically arranged pushing plates 18 are fixedly installed on the lifting frame 5. The pushing plates 18 are generally bent. A connector is installed on the grinding frame body 1. The connector is connected to the clamping plate 22. When the pushing plate 18 moves to the designated position, the pushing plate 18 pushes the spring telescopic rod 20 to the designated position and pushes the clamping plate 22 down through the connector.

[0029] The connecting component includes a swing plate 25 rotatably connected to the grinding frame body 1, a first roller 24 rotatably connected to the push plate 18, a moving block 27 slidably connected to the mounting frame 8, a clamping plate 22 slidably connected to the bottom of the moving block 27, guide grooves 10 are provided on both sides of the mounting frame 8, and rollers 29 mounted on the clamping plate 22 are slidably connected in the guide grooves 10. A second roller 26 is installed on one side of the moving block 27. The first roller 24 pushes the swing plate 25 to abut against the second roller 26. The distance between the first roller 24 and the central axis of the swing plate 25 is A, and the distance between the second roller 26 and the central axis of the swing plate 25 is B. A is greater than B.

[0030] A first rack 12 is fixedly mounted on the push plate 18, and a rotating gear 13 is rotatably connected to the grinding frame body 1. The first rack 12 and the rotating gear 13 mesh with each other. A second rack 11 is fixedly mounted on the annular moving frame 3, and the second rack 11 meshes with the rotating gear 13. The mounting plane 102 is generally inclined, with the inclination direction upward. The angle between the mounting plane 102 and the vertical direction is greater than 5° and less than 15°. A grinding plate 17 is slidably connected inside the mounting frame 8. A telescopic rod 30 is mounted on the grinding frame body 1. A long tube 15 is fixedly mounted on the movable end of the telescopic rod 30. Long rods 16 are slidably connected to both sides of the long tube 15. Both sides of the long rods 16 are fixedly mounted on the grinding plate 17. A compression spring 31 is sleeved on the telescopic rod 30.

[0031] The grinding frame body 1 includes a pusher frame 101 and a long plate 2. The pusher frame 101 is generally L-shaped. The long plate 2 is fixedly installed on one vertical side of the pusher frame 101. Multiple casters are installed at the bottom of the pusher frame 101. The bottom of the lifting frame 5 is rotatably connected to a limit plate 6, and a torsion spring 23 is installed at the rotatable connection. When the lifting frame 5 moves the limit plate 6 to a designated position, the limit plate 6 vertically abuts against the bottom of the frame. When the lifting frame 5 continues to move, the limit plate 6 flips to an angle perpendicular to the mounting plane 102.

[0032] When the equipment is in use, during the frame production process, the entire frame is suspended on a continuous conveyor line. The grinding frame body 1 is installed at a suitable position on the side of the conveyor line. After the conveyor line moves the suspended frame to the grinding area, it pushes the grinding frame body 1 to move below the frame. The electric telescopic rod 9 is activated to push the lifting frame 5 upward.

[0033] Grinding can be performed during workpiece movement via a movable mounting plane 102. The mounting plane 102 is inclined upwards, allowing the lifted frame to tilt to one side and rest against the mounting plane 102, ensuring the frame is securely mounted on the grinding frame body 1. The angle between the mounting plane 102 and the vertical direction is greater than 5° to ensure the frame can rest completely against the mounting plane 102 after tilting, guaranteeing the stability of the frame installation. The angle between the mounting plane 102 and the vertical direction cannot exceed 15° to prevent the frame from violently colliding with the grinding frame body 1 due to excessive tilt angle after tilting to one side. The entire frame is suspended on a continuous conveyor line. When the lifting frame 5 is driven upwards by the electric telescopic rod 9, the continuously moving lifting frame 5 will push the limiting plate 6 to gradually move upwards until it contacts and supports the bottom of the frame. As the lifting frame 5 continues to rise, the limiting plate 6 begins to flip downwards due to the weight of the frame itself. However, this flipping process is not unlimited—the limiting plate 6 will stop rotating when it reaches a specific angle perpendicular to the mounting plane 102. Through this ingenious swing mechanism, the bottom of the frame can be completely and stably abutted against the lower limiting plate 6, and then smoothly flipped onto the mounting plane 102, thereby ensuring that the entire frame can achieve a complete and tight fit with the mounting plane 102. The electric telescopic rod 9 is activated to push the lifting frame 5 upward. During the upward movement of the lifting frame 5, it will drive the two bent push plates 18 to move upward synchronously. When the push plates 18 move upward, they will gradually squeeze the ball bearings 21. Since the two push plates 18 are tilted towards the middle, the ball bearings 21 are squeezed and move towards the middle. The two centering long plates 7 move towards each other synchronously under the drive of the spring telescopic rod 20, completing the centering and positioning of the frame. After the centering long plates 7 have completed the centering movement, the floating grinding head 4 can be driven by the annular moving frame 3 to move along the weld seam path of the frame to complete the weld seam grinding operation.

[0034] The push plate 18 pushes the two clamping plates 22 to clamp the frame. At this time, the lifting frame 5 drives the push plate 18 to continue moving upward, so that one end of the first roller 24 abuts against the swing plate 25. The first roller 24 pushes the swing plate 25 to deflect around the rotation center. The other end of the deflected swing plate 25 will push the second roller 26, causing the moving block 27 to move to one side. Because the mounting frame 8 has guide grooves 10 on both sides, and rollers 29 mounted on the clamping plates 22 are slidably connected in the guide grooves 10, the clamping... The plate 22 is slidably connected to the bottom of the moving block 27. So when the moving block 27 moves, the clamping plate 22 will move downward continuously to hold the frame in place. Of course, the distance between the first roller 24 and the central axis of the swing plate 25 is greater than the distance between the second roller 26 and the central axis of the swing plate 25, ensuring that the first roller 24 can easily push the second roller 26 to move through the swing plate 25. At the same time, the plastic friction plate 28 can be adapted to frames with different surface flatness to avoid scratching the paint of the frame during clamping.

[0035] The plastic friction pads 28 will experience wear during prolonged compression and friction. Using plastic friction pads 28 reduces wear on the frame, ensuring that only the plastic friction pads 28 are worn. However, since the two plastic friction pads 28 are located on opposite sides, their wear is uneven. Over time, this can lead to one side of the plastic friction pad 28 securing itself to the frame while the other side only presses against it, resulting in incomplete frame fixation. Therefore, it is necessary to ensure that the friction on both sides of the plastic friction pads 28 is equal. This is achieved by using the grinding plates 17 on both sides to grind the plastic friction pads 28, ensuring that the relative positions of the plastic friction pads 28 on both sides are the same. Specifically, the grinding plates 17... The 7 will slide along the working surface of the plastic friction plate 28 to grind away the worn, thickened or unevenly thickened parts. During the process, the compression spring 31 will continuously provide a reset buffer force to the telescopic rod 30 to ensure that the grinding pressure of the grinding plate 17 is stable. At the same time, the two grinding plates 17 are connected by the long tube 15 and the long rod 16. The telescopic rod 30 connected to the grinding plate 17 can only move back and forth, so that the moving distance of the two grinding plates 17 is the same. When one side of the plastic friction plate 28 is thicker than the other side, the grinding plate 17 will apply a certain force to rub the thicker side of the plastic friction plate 28, thereby maintaining the consistency of the thickness of the two plastic friction plates 28 and ensuring the fixed stability of the frame.

[0036] When the lower lifting frame 5 begins to move upward, its top directly pushes the connected push plate 18, causing the push plate 18 to move upward as well. During its ascent, the push plate 18 drives the first rack 12, fixed to its upper surface, to move upward as well. The first rack 12 meshes with a rotating gear 13; therefore, when the first rack 12 moves upward, it drives the rotating gear 13 to rotate. The rotation of the rotating gear 13 then drives the second rack 11, which meshes with the other side, to move downward in the opposite direction. The second rack 11 is fixedly mounted on the annular moving frame 3; therefore, the downward movement of the second rack 11 directly drives the entire annular moving frame 3 to move downward. Through this series of linkages, the floating grinding head 4, fixed on the annular moving frame 3, can quickly and accurately descend to the preset processing position, thus immediately beginning the grinding process on the workpiece.

[0037] After grinding and polishing, the lifting frame 5 moves downward and drives the annular moving frame 3 upward through the first rack 12, the second rack 11 and the rotating gear 13. At the same time, the pushing plate 18 moves downward away from the spring telescopic rod 20 on one side, so that the grinding frame body 1 can be separated from the frame to be ground, ensuring stable operation in the next operation.

[0038] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A grinding device for vehicle frame welds equipped with a floating grinding head, characterized in that, The device includes a grinding frame body (1), on which a ring-shaped moving frame (3) is slidably connected. A floating grinding head (4) is slidably connected to the ring-shaped moving frame (3). A lifting frame (5) is slidably connected to the bottom of the grinding frame body (1). The lifting frame (5) and one side surface of the grinding frame body (1) form an installation plane (102). An electric telescopic rod (9) is fixedly installed on the grinding frame body (1). The movable end of the electric telescopic rod (9) is fixedly installed to the lifting frame (5). Two sliding connections are made on the installation plane (102). A symmetrically arranged centering long plate (7) is fixedly installed on the centering long plate (7). A clamping plate (22) is slidably connected in the mounting frame (8). A groove is opened at the bottom of the clamping plate (22). A plastic friction plate (28) is fixedly installed in the groove. A pushing component is installed on the grinding frame body (1). The pushing component is connected to the lifting frame (5). When the electric telescopic rod (9) pushes the lifting frame (5) to move, the pushing component drives the two centering long plates (7) to move closer to each other and drives the clamping plate (22) to move downward.

2. The chassis weld grinding equipment with a floating grinding head according to claim 1, characterized in that, The pushing assembly includes a support frame (19) fixedly installed on the grinding frame body (1). A spring telescopic rod (20) is slidably connected to the support frame (19). One side of the centering long plate (7) is fixedly installed with the movable end of the spring telescopic rod (20), and the two centering long plates (7) are inclined towards the middle as a whole. A roller (29) is fixedly installed on the fixed end of the spring telescopic rod (20). Two symmetrically arranged pushing plates (18) are fixedly installed on the lifting frame (5). The pushing plates (18) are bent as a whole. A connector is installed on the grinding frame body (1). The connector is connected to the clamping plate (22). When the pushing plate (18) moves to the designated position, the pushing plate (18) pushes the spring telescopic rod (20) to the designated position and pushes the clamping plate (22) down through the connector.

3. The chassis weld grinding equipment with a floating grinding head according to claim 2, characterized in that, The connecting component includes a swing plate (25) rotatably connected to the grinding frame body (1), a first roller (24) rotatably connected to the push plate (18), a moving block (27) slidably connected to the mounting frame (8), a clamping plate (22) slidably connected to the bottom of the moving block (27), guide grooves (10) are provided on both sides of the mounting frame (8), a roller (29) mounted on the clamping plate (22) is slidably connected in the guide groove (10), a second roller (26) is installed on one side of the moving block (27), the first roller (24) pushes the swing plate (25) to abut against the second roller (26), the distance between the first roller (24) and the central axis of the swing plate (25) is A, the distance between the second roller (26) and the central axis of the swing plate (25) is B, and A is greater than B.

4. A chassis weld grinding device with a floating grinding head according to claim 2, characterized in that, A first rack (12) is fixedly installed on the push plate (18), and a rotating gear (13) is rotatably connected to the grinding frame body (1). The first rack (12) and the rotating gear (13) mesh with each other. A second rack (11) is fixedly installed on the annular moving frame (3), and the second rack (11) and the rotating gear (13) mesh with each other.

5. A chassis weld grinding device with a floating grinding head according to claim 1, characterized in that, The mounting plane (102) is generally inclined, and the inclined direction is upward. The angle between the mounting plane (102) and the vertical direction is greater than 5° and less than 15°.

6. A chassis weld grinding device with a floating grinding head according to claim 3, characterized in that, A grinding plate (17) is slidably connected inside the mounting bracket (8). A telescopic rod (30) is installed on the grinding bracket body (1). A long tube (15) is fixedly installed on the movable end of the telescopic rod (30). Long rods (16) are slidably connected on both sides of the long tube (15). Both sides of the long rods (16) are fixedly installed on the grinding plate (17). A compression spring (31) is sleeved on the telescopic rod (30).

7. A chassis weld grinding device with a floating grinding head according to claim 1, characterized in that, The grinding frame body (1) includes a push frame (101) and a long plate (2). The push frame (101) is generally L-shaped. The long plate (2) is fixedly installed on one vertical side of the push frame (101). Multiple moving wheels are installed at the bottom of the push frame (101).

8. A chassis weld grinding device with a floating grinding head according to claim 5, characterized in that, The bottom of the lifting frame (5) is rotatably connected to a limiting plate (6), and a torsion spring (23) is installed at the rotatable connection. When the lifting frame (5) moves the limiting plate (6) to a designated position, the limiting plate (6) is perpendicular to the bottom of the frame. When the lifting frame (5) continues to move, the limiting plate (6) is flipped to an angle perpendicular to the mounting plane (102).

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