Engine cylinder cover turnover device and using method

Abstract

The invention discloses an engine cylinder cover turnover device and a using method, the engine cylinder cover turnover device comprises a turnover frame, the turnover frame comprises turnover discs and supporting rods, the turnover discs are symmetrically arranged, and a plurality of supporting rods are arranged on the inner sides of the turnover discs at intervals; an annular sliding rail is arranged on the outer side of the overturning disc, a supporting roller set is arranged at the lower end of the overturning disc, and the supporting roller set is movably connected with the annular sliding rail. An air cylinder is arranged at the upper end of the overturning frame, the output end of the air cylinder is connected with a clamping block support, the air cylinder drives the clamping block support to move, and a clamping block is arranged on the clamping block support. Rollers are arranged on the roll-over stand, track plates are arranged at the high ends of the rollers in the next year, a pipe clamp support is arranged at one end of each track plate, a pipe clamp clamping block is arranged at the upper end of each pipe clamp support, a pipe clamp is arranged at one end of each pipe clamp clamping block, and a guide rod is clamped by one end of each pipe clamp. The overturning angle of the cylinder cover can be precisely controlled for valve installation, and the assembly precision and operation safety are guaranteed; and the device is suitable for different sites and roller line layouts, displacement and collision of the cylinder cover are avoided, and the applicability is high.

Description

Technical Field

[0001] This invention belongs to the field of engine cylinder head assembly technology, specifically relating to an engine cylinder head flipping device and its usage method. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] In the field of engine manufacturing, the cylinder head, as one of the core components of an engine, directly determines the engine's power performance, sealing performance, and service life through its assembly quality. Among these processes, the assembly of the intake and exhaust valves is a critical step in the cylinder head manufacturing process. The successful execution of this step depends on the precise adjustment of the cylinder head's orientation. Due to the inherent structural characteristics of the cylinder head, the mounting holes and related assembly surfaces for the intake and exhaust valves are mostly located in the non-top surface area of ​​the cylinder head. Therefore, during valve assembly, the cylinder head must be flipped and inverted to provide a usable working space for operators or automated equipment, ensuring the accurate installation of components such as valves, valve springs, and valve locks. Currently, the flipping operation in the cylinder head assembly valve process is generally completed on a free roller conveyor line. The core design idea of ​​the existing flipping method is: based on the height of a specific cylinder head model, a fixed coarse limiting structure is set on the roller conveyor line. When the cylinder head is conveyed from the roller conveyor to the flipping station, the coarse limiting block contacts the edge or a specific part of the cylinder head and forms a limit, and then the flipping mechanism drives the cylinder head to complete the inversion action around the limiting point. However, this flipping method based on fixed coarse limiting has the following problems in practical applications: First, the reliability is insufficient. In existing flipping methods, all the forces on the cylinder head during the flipping process are concentrated on the fixed limiting block. As a typical thin-walled casting, the cylinder head has limited structural strength at the limiting contact area. After being subjected to the impact force during the flipping process for a long time, the limiting block is prone to wear, deformation, or even breakage. This not only requires frequent shutdowns to replace the limiting components, affecting production continuity, but also may cause the cylinder head to shift during the flipping process due to limiting failure, increasing the risk of assembly errors. Secondly, the cylinder head surface has a prominent risk of impact. Because the coarse limiting structure can only achieve a rough positioning of the cylinder head, it cannot make adaptive contact according to the cylinder head's shape and surface precision requirements. During the flipping process, rigid collisions or sliding friction are likely to occur between the cylinder head and the limiting block, causing collisions with the limiting block. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides an engine cylinder head flipping device and its usage method, which can precisely control the cylinder head flipping angle for valve installation, ensuring assembly accuracy and operational safety; it is adaptable to different sites and roller conveyor layouts, avoiding cylinder head displacement and collisions, and has strong applicability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An engine cylinder head flipping device includes a flipping frame, the flipping frame including a flipping disk and support rods, the flipping disks are symmetrically arranged, and a plurality of support rods are spaced apart on the inner side of the flipping disks; an annular slide rail is provided on the outer side of the flipping disks, and a support roller assembly is provided at the lower end of the flipping disks, the support roller assembly being movably connected to the annular slide rails; A cylinder is installed at the upper end of the flipping frame. The output end of the cylinder is connected to the clamping block bracket. The cylinder drives the clamping block bracket to move. A clamping block is installed on the clamping block bracket. Rollers are installed on the flipping frame. A track plate is installed at the upper end of the rollers. A pipe clamp support is installed at one end of the track plate. A pipe clamping block is installed at the upper end of the pipe clamp support. A pipe clamp is installed at one end of the pipe clamping block. A guide rod is clamped at one end of the pipe clamp.

[0006] As a further technical solution, the support roller assembly includes a first support roller and a second support roller, with the first support roller provided at one end of the flip disk and the second support roller provided at the other end.

[0007] As a further technical solution, a bolt is provided at the lower end of the first support roller, and the first support roller is mounted on the table frame by the bolt; a bearing is installed on the first support roller, and the first support roller is movably connected to the annular slide rail on the flipping frame; a bolt is provided at the lower end of the second support roller, and the second support roller is mounted on the table frame by the bolt; a bearing is installed on the second support roller, and the second support roller is movably connected to the annular slide rail on the flipping frame.

[0008] As a further technical solution, the rollers are arranged at both ends of the tilting frame, and the rollers are fixed to the tilting frame by the roller frame; the upper end of the tilting frame is equipped with a cylinder by a pneumatic compressor fixing plate.

[0009] As a further technical solution, a manual valve is also included. The manual valve is installed on the table frame, one end of the manual valve is connected to the air circuit, and the other end of the manual valve is connected to the cylinder through a pipe. The manual valve is connected to the air circuit as the power source for the cylinder.

[0010] As a further technical solution, a locking structure is also included, which is fixed to the table frame; the top and bottom ends of the annular slide rail are provided with grooves, which, together with the locking structure, allow the flip frame to be accurately fixed at a specific angle when flipped.

[0011] As a further technical solution, a support is provided at the bottom of the table frame, and the support is used for height adjustment.

[0012] As a further technical solution, a cylinder head tray is provided at the upper end of the roller. The cylinder head tray includes a base plate, a valve support plate, and a positioning pin. The valve support plate is provided at the upper end of the base plate, and a positioning pin is provided on the side of the valve support plate. The positioning pin is installed on the base plate. The positioning pin cooperates with the bolt holes on the engine cylinder head to make the cylinder head stably placed on the cylinder head tray.

[0013] A method of using an engine cylinder head flipping device includes the following steps: The engine cylinder head to be fitted with valves is placed on the cylinder head tray. The cylinder head is then securely fixed to the tray by engaging the bolt holes on the cylinder head with the locating pins on the tray. The tray containing the cylinder head is then pushed along the guide rod on the tilting frame track. The guide rod is held by pipe clamps, which are connected to the track via pipe clamp supports, serving as a guide and conveyor. The cylinder head is then pushed from the front free roller conveyor to the designated position on the tilting frame track. At this point, the manual valve on the control table moves the cylinder piston downwards, causing the clamping block bracket and the bottom clamping block to move downwards synchronously until the clamping block contacts and presses against the cylinder head surface, completing the pre-rotation fixation. Next, unlock the locking structure and push the tilting frame. The tilting frame rolls along the bearing of the supporting roller via the annular slide rail on the outside of the tilting plate, slowly rotating the tilting frame. When the groove at the bottom of the annular slide rail aligns with the locking structure, the locking structure automatically engages in the groove, fixing the tilting frame in an inverted state, with the bottom surface of the cylinder head facing upwards. Then, operate the manual valve again to retract the cylinder piston, causing the pipe clamp block to move upwards and loosen the cylinder head. Install the intake and exhaust valves into the valve guides of the cylinder head in sequence according to the process requirements.

[0014] After the valves are installed, align the positioning pins of the cylinder head tray with the corresponding bolt holes on the bottom of the cylinder head, and check that the valve support plate on the tray is in close contact with the bottom of the cylinder head to ensure that it presses the bottom of the intake and exhaust valves tightly to prevent the valves from falling off during subsequent operations. Then, manipulate the manual valve to control the cylinder to move downwards again, clamping the cylinder head and cylinder head tray together through the pipe clamp block; unlock the locking structure, push the flipping frame in the opposite direction to rotate it to the initial direction. At this time, the cylinder head tray is in a horizontal state below the cylinder head, and the locking structure is engaged with the groove at the top of the annular slide rail to fix the flipping frame.

[0015] Compared with the prior art, the advantages and positive effects of this invention are: This invention achieves valve installation through the cooperation of a support roller assembly, an annular slide rail, and a locking structure. The first and second support rollers are symmetrically mounted on a workbench, both equipped with bearings. An annular slide rail is located on the outer side of the tilting platform, engaging with the bearings of the support rollers. During tilting, the operator pushes the tilting frame, causing the annular slide rail to roll along the bearings. The support rollers evenly bear the weight of the cylinder head and the tilting frame, while the annular slide rail limits the tilting trajectory to prevent deviation. When the tilting frame rotates to the required angle, valve installation is performed. At this point, the groove at the bottom of the annular slide rail engages with the locking structure fixed to the workbench, stably locking the tilting frame and ensuring that the valve mounting holes are horizontal and stable when the cylinder head is facing upwards. This structural cooperation reduces the risk of jamming during valve insertion into the guide tube, providing reliable posture assurance for precise assembly. This invention provides impact protection. First, the cylinder head is placed on a cylinder head tray, with the tray's locating pins engaging with the cylinder head bolt holes to secure it. Rollers on a tilting frame transport the tray along these rollers, using rolling friction instead of sliding friction to prevent the cylinder head's bottom sealing surface from scraping against the track. Second, a cylinder is mounted on the upper end of the tilting frame via a pneumatic compressor mounting plate. The cylinder's output end connects to a clamping block bracket and clamping blocks. A manual valve controls the cylinder's extension and retraction, causing the clamping blocks to move downwards and press against the cylinder head. The clamping blocks and cylinder head self-adaptively contact, avoiding precision areas such as air intakes and preventing rigid impacts. Finally, during the tilting process, the annular slide rail and bearings roll smoothly without impact or vibration, preventing cylinder head displacement and potential damage to the valve mounting hole edges. This effectively avoids impacts and ensures a tight seal between the valves and cylinder head after assembly, preventing valve leakage during engine operation. This invention features a cylinder head tray. A valve support plate and locating pins are mounted on the base of the cylinder head tray. After the valve is inserted into the cylinder head guide, the locating pins on the tray are aligned with the bolt holes on the bottom surface of the cylinder head, causing the valve support plate to fit snugly against the bottom surface of the cylinder head, providing axial support to the bottom of the valve from below. Subsequently, a manual valve is operated to control the cylinder to move downwards, causing the clamping blocks to simultaneously clamp the cylinder head and the tray, maintaining stable contact pressure between the valve support plate and the valve. During the flipping and resetting process, the tray and cylinder head remain fixed, and the valve support plate continuously supports the valve, effectively improving assembly continuity. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0017] Figure 1 This is a front view of the engine cylinder head flipping device of the present invention; Figure 2 This is a side view of the engine cylinder head flipping device of the present invention; Figure 3 This is a top view of the engine cylinder head flipping device of the present invention; Figure 4 This is a structural diagram of the flipping frame of the present invention; Figure 5 This is a diagram illustrating the engine cylinder head flipping process of the present invention; Figure 6 This is a structural diagram of the cylinder head tray of the present invention.

[0018] In the diagram: 1. Tilting frame; 2. First support roller; 3. Locking structure; 4. Second support roller; 5. Manual valve; 6. Table frame; 7. Cylinder; 8. Tilting disc; 9. Pneumatic compressor fixing plate; 10. Clamping block bracket; 11. Clamping block; 12. Guide rod; 13. Pipe clamping block; 14. Pipe clamp; 15. Pipe clamp support; 16. Track plate; 17. Roller; 18. Bearing; 19. Bolt; 20. Base plate; 21. Valve support plate; 22. Positioning pin. Detailed Implementation

[0019] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0020] Currently, the flipping operation in the cylinder head assembly valve process is generally completed on a free roller conveyor line. The core design idea of ​​the existing flipping method is: based on the height of a specific cylinder head model, a fixed coarse limiting structure is set on the roller conveyor line. When the cylinder head is conveyed from the roller conveyor to the flipping station, the coarse limiting block contacts the edge or a specific part of the cylinder head and forms a limit, and then the flipping mechanism drives the cylinder head to complete the inversion action around the limiting point. However, this flipping method based on fixed coarse limiting has the following problems in practical applications: First, reliability is insufficient. In existing cylinder head flipping methods, all the force during the flipping process is concentrated on the fixed limiting block. However, as a typical thin-walled casting, the cylinder head has limited structural strength at the limiting contact area. After long-term exposure to the impact force during flipping, the limiting block is prone to wear, deformation, or even breakage. This not only requires frequent shutdowns to replace the limiting components, affecting production continuity, but also may cause the cylinder head to shift during flipping due to limiting failure, increasing the risk of assembly errors. Second, the risk of impact on the cylinder head surface is significant. Because the coarse limiting structure can only achieve approximate positioning of the cylinder head, it cannot achieve adaptive contact according to the cylinder head's shape and surface precision requirements. During flipping, rigid collisions or sliding friction can easily occur between the cylinder head and the limiting block, leading to impacts.

[0021] Example 1: The present invention will now be described in detail with reference to the accompanying drawings. This embodiment discloses an engine cylinder head flipping device, such as... Figure 1 , Figure 2 as well as Figure 3As shown, it includes a tilting frame 1, which includes a tilting disk 8 and support rods. The tilting disk 8 is symmetrically arranged, and several support rods are spaced apart on the inner side of the tilting disk 8. An annular slide rail is provided on the outer side of the tilting disk 8, and a support roller assembly is provided at the lower end of the tilting disk 8. The support roller assembly is movably connected to the annular slide rail. like Figure 4 As shown, a cylinder 7 is installed at the upper end of the tilting frame 1. The output end of the cylinder 7 is connected to the clamping block support 10. The cylinder 7 drives the clamping block support 10 to move. A clamping block 11 is installed on the clamping block support 10. A roller 17 is installed on the tilting frame 1. A track plate 16 is installed at the upper end of the roller 17. A pipe clamp support 15 is installed at one end of the track plate 16. A pipe clamping block 13 is installed at the upper end of the pipe clamp support 15. A pipe clamp 14 is installed at one end of the pipe clamping block 13. One end of the pipe clamp 14 clamps the guide rod 12.

[0022] Specifically, valve installation is achieved through the cooperation of a support roller assembly, annular slide rail, and locking structure 3. The first support roller 2 and the second support roller 4 are symmetrically mounted on the table frame 6, both equipped with bearings 18. Annular slide rails are provided on the outer side of the tilting plate 8, engaging with the bearings 18 of the support rollers 17. During tilting, the operator pushes the tilting frame 1, causing the annular slide rails to roll along the bearings 18. The support rollers 17 evenly bear the weight of the cylinder head and tilting frame 1, while the annular slide rails limit the tilting trajectory to prevent deviation. When the tilting frame 1 rotates to the required angle, valve installation is performed. At this point, the groove at the bottom of the annular slide rail engages with the locking structure 3 fixed to the table frame 6, stably locking the tilting frame 1 and ensuring that the valve mounting holes are on a horizontal reference plane without any wobble when the cylinder head bottom surface is facing upwards. This structural cooperation reduces the risk of jamming when inserting the valve guide, providing reliable posture assurance for precise assembly.

[0023] It also provides anti-collision protection. First, the cylinder head is placed on the cylinder head tray, and the positioning pins 22 of the tray mate with the cylinder head bolt holes to secure the cylinder head. Rollers 17 are installed on the tilting frame 1, and the tray is transported along the rollers 17. Rolling friction replaces sliding friction, preventing the bottom sealing surface of the cylinder head from scraping against the track. Second, the cylinder 7 is installed on the upper end of the tilting frame 1 via the pneumatic press fixing plate 9. The output end of the cylinder 7 is connected to the clamping block bracket 10 and the clamping block 11. The manual valve 5 is operated to control the extension and retraction of the cylinder 7, which drives the clamping block 11 to move down and press against the cylinder head. The clamping block 11 makes adaptive contact with the cylinder head, avoiding precision areas such as the air passage opening and preventing rigid impact. Finally, during the tilting process, the annular slide rail and bearing 18 roll smoothly without impact or vibration, preventing the cylinder head from shifting and causing the valve mounting hole edges to collide. This effectively avoids collisions and ensures a good seal between the valve and the cylinder head after valve assembly, preventing valve leakage during engine operation.

[0024] The support roller assembly includes a first support roller 2 and a second support roller 4. The first support roller 2 is located at one end of the tilting tray 8, and the second support roller 4 is located at the other end. A bolt 19 is installed at the lower end of the first support roller 2, which is then mounted on the table frame 6. A bearing 18 is installed on the first support roller 2, and the first support roller 2 is movably connected to the annular slide rail on the tilting frame 1. Similarly, a bolt 19 is installed at the lower end of the second support roller 4, which is also mounted on the table frame 6. A bearing 18 is installed on the second support roller 4, and the second support roller 4 is movably connected to the annular slide rail on the tilting frame 1.

[0025] Specifically, the first support roller 2 and the second support roller 4 are symmetrically mounted on the table frame 6 by bolts 19. Both are equipped with bearings 18 and are movably connected to the annular slide rail on the outside of the flipping plate 8 of the flipping frame 1, so as to evenly bear the weight of the flipping frame 1 and the cylinder head. The cooperation between the bearings 18 and the annular slide rail can reduce the flipping resistance and ensure that the flipping process is smooth and stable. At the same time, the cooperation between the annular slide rail and the support roller 17 can limit the flipping trajectory and prevent the flipping frame 1 from deviating, providing stable and reliable support and guidance for the cylinder head flipping.

[0026] Rollers 17 are set at both ends of the tilting frame 1, and rollers 17 are fixed to the tilting frame 1 by roller 17 bracket; cylinder 7 is installed on the upper end of the tilting frame 1 by pneumatic compressor fixing plate 9.

[0027] Specifically, the rotation of the tilting frame 1 drives the roller 17 to rotate synchronously, which in turn drives the clamping block 11 to move down and press against the cylinder head via the cylinder 7. This, in turn, drives the cylinder head to rotate for valve installation. The clamping action of the cylinder 7 replaces the original limiting slot, freeing up more lateral and vertical space, thus making it suitable for cylinder heads of various sizes. Furthermore, the clamping action of the cylinder 7 provides greater stability and reliability during use, improving work efficiency while ensuring operator safety.

[0028] It also includes a manual valve 5, which is installed on the table frame 6. One end of the manual valve 5 is connected to the air circuit, and the other end of the manual valve 5 is connected to the cylinder 7 through a pipe. The manual valve 5 is connected to the air circuit as the power source for the cylinder 7.

[0029] Specifically, the manual valve 5 is mounted on the table frame 6, with one end connected to the air circuit and the other end connected to the cylinder 7 via a pipe. The air circuit serves as the power source to control the operation of the cylinder 7. The operator can directly operate the manual valve 5 near the workstation, switching the air circuit on and off to drive the cylinder 7 to extend and retract, thereby controlling the clamping and releasing of the clamping block 11 on the cylinder head. It also includes a locking structure 3, which is fixed to the table frame 6; the top and bottom of the annular slide rail are provided with grooves, which, together with the locking structure 3, allow the flip frame 1 to be accurately fixed at a specific angle when flipped.

[0030] The locking structure 3 is fixed to the table frame 6 and mates with the grooves at the top and bottom of the annular slide rail on the outer side of the tilting plate 8. When the tilting frame 1 is rotated to the required angle for valve installation, the locking structure 3 can engage with the corresponding groove to firmly fix the tilting frame 1, thereby preventing accidental rotation of the tilting frame 1 during valve assembly. This provides a stable working platform for the operator, ensuring the accuracy of delicate operations such as valve installation and locking plate assembly; it also avoids excessive rotation due to inertia during the tilting process, ensuring operational safety.

[0031] The locking structure 3 contains a spring that presses the small bearing at the top of the locking pin against the surface of the annular slide rail; by pressing the small bearing on the locking structure 3 into the groove of the annular slide rail, the flipping frame 1 is accurately fixed at a specific angle.

[0032] The table frame 6 has a support at the bottom for height adjustment.

[0033] Specifically, the support at the bottom of the table frame 6 is height-adjustable. By adjusting the height of the support, the two ends of the track of the flipping frame 1 can be kept flush with the front and rear free roller conveyor lines. The height-adjustable support allows the device to adapt to production sites and roller conveyor line layouts of different heights, enhancing the site adaptability of the equipment.

[0034] like Figure 6 As shown, a cylinder head tray is provided at the upper end of the roller 17. The cylinder head tray includes a base plate 20, a valve support plate 21, and a positioning pin 22. The valve support plate 21 is provided at the upper end of the base plate 20, and the positioning pin 22 is provided on the side of the valve support plate 21. The positioning pin 22 is installed on the base plate 20. The positioning pin 22 cooperates with the bolt holes on the engine cylinder head to make the cylinder head stably placed on the cylinder head tray.

[0035] Specifically, valve support plates 21 and locating pins 22 are installed on the base plate 20 of the cylinder head tray. After the valve is inserted into the cylinder head guide, the locating pins 22 of the tray are aligned with the bolt holes on the bottom surface of the cylinder head, so that the valve support plate 21 fits against the bottom surface of the cylinder head, supporting the bottom end of the valve from below to form axial support. Then, the manual valve 5 is operated to control the cylinder 7 to move down, so that the clamping block 11 clamps the cylinder head and the tray at the same time, maintaining a stable contact pressure between the valve support plate 21 and the valve. During the flipping and resetting process, the tray and the cylinder head remain fixed, and the valve support plate 21 continuously supports the valve, effectively improving the assembly continuity.

[0036] Example 2: A method of using an engine cylinder head flipping device includes the following steps: The engine cylinder head to be fitted with valves is placed on the cylinder head tray. The cylinder head is then stably fixed to the tray by engaging the bolt holes on the cylinder head with the positioning pins 22 on the cylinder head tray. The tray containing the cylinder head is then pushed along the guide rod 12 on the track of the tilting frame 1. The guide rod 12 is held by a pipe clamp 14, which is connected to the track via a pipe clamp support 15, serving as a guide for transport. The cylinder head is pushed from the front free roller conveyor to the designated position on the track of the tilting frame 1. At this time, the manual valve 5 on the control table 6 causes the piston of the cylinder 7 to move downwards, driving the clamping block bracket 10 and the bottom clamping block 11 to move downwards synchronously until the clamping block 11 contacts and presses the cylinder head against the surface, completing the fixation before rotation. Next, unlock the locking structure 3 and push the tilting frame 1. The tilting frame 1 rolls along the bearing 18 of the supporting roller 17 via the annular slide rail on the outside of the tilting disc 8, slowly rotating the tilting frame 1. When the groove at the bottom of the annular slide rail is aligned with the locking structure 3, the locking structure 3 automatically engages in the groove, fixing the tilting frame 1 in an inverted state, with the bottom surface of the cylinder head facing upwards. Then, operate the manual valve 5 again to retract the piston of the cylinder 7, causing the pipe clamp block 13 to move upwards and loosen the cylinder head. According to the process requirements, install the intake valve and exhaust valve into the valve guide of the cylinder head in sequence.

[0037] After the valves are installed, align the positioning pins 22 of the cylinder head tray with the corresponding bolt holes on the bottom of the cylinder head again and fix them in place. Check that the valve support plate 21 on the tray is in close contact with the bottom of the cylinder head to ensure that it presses the bottom of the intake and exhaust valves together and prevents the valves from falling off during subsequent operations. Then, the manual valve 5 is operated to control the cylinder 7 to move downward again, and the cylinder head and cylinder head tray are clamped together by the pipe clamp block 13; the locking structure 3 is unlocked, and the flipping frame 1 is pushed in the opposite direction to rotate it to the initial direction. At this time, the cylinder head tray is in a horizontal state below the cylinder head, and the locking structure 3 is engaged with the groove at the top of the annular slide rail to fix the flipping frame 1.

[0038] like Figure 5 As shown, in state 1, the engine cylinder head is placed on roller 17. Then, cylinder 7 drives clamp 11 to press the engine cylinder head. Next, manual valve 5 is controlled to rotate the tilting frame 1. As shown in states 2, 3, and 4, the engine cylinder head is tilted. Then, cylinder 7 is activated to drive clamp 11 to release the clamp on the engine cylinder head. As shown in state 5, the valves are installed. As shown in state 6, the cylinder head tray is placed on the engine cylinder head. As shown in state 7, cylinder 7 is activated to lift the engine cylinder head so that the cylinder head tray contacts roller 17. As shown in states 8 and 9, manual valve 5 is controlled to tilt the engine cylinder head.

[0039] Specifically, after connecting this device to the air circuit, cylinder heads of various sizes can be transported from the front free roller conveyor to the corresponding position on the track of the tilting frame 1 along the guide rod 12. At this time, the manual valve 5 is controlled to move downward to clamp the cylinder head. The operator manually operates the tilting plate 8 to rotate 180 degrees in the specified direction so that the bottom surface of the cylinder head faces upward. The manual valve 5 is operated again to retract the piston of the cylinder 7, release the clamping block 11 that clamps the cylinder head, and after the intake and exhaust valves are installed, the cylinder head tray is placed on the bottom surface of the cylinder head by the positioning pin 22 and the bolt holes on the cylinder head, pressing the intake and exhaust valves. The manual valve 5 is operated again to make the cylinder 7 clamp the cylinder head and the cylinder head tray. The tilting frame 1 is manually operated to return the tilting frame 1 to its original state. The manual valve 5 is operated to make the cylinder 7 release the cylinder head, so that the tray can lift the cylinder head and run on the track to the rear free roller conveyor.

[0040] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. An engine cylinder head flipping device, characterized in that, The device includes a tilting frame, which comprises a tilting disk and support rods. The tilting disk is symmetrically arranged, and several support rods are spaced apart on the inner side of the tilting disk. An annular slide rail is provided on the outer side of the tilting disk, and a support roller assembly is provided at the lower end of the tilting disk. The support roller assembly is movably connected to the annular slide rail. A cylinder is installed at the upper end of the flipping frame. The output end of the cylinder is connected to the clamping block bracket. The cylinder drives the clamping block bracket to move. A clamping block is installed on the clamping block bracket. Rollers are installed on the flipping frame. A track plate is installed at the upper end of the rollers. A pipe clamp support is installed at one end of the track plate. A pipe clamping block is installed at the upper end of the pipe clamp support. A pipe clamp is installed at one end of the pipe clamping block. A guide rod is clamped at one end of the pipe clamp.

2. The engine cylinder head flipping device as described in claim 1, characterized in that, The support roller assembly includes a first support roller and a second support roller, with the first support roller provided at one end of the tilting disc and the second support roller provided at the other end.

3. The engine cylinder head flipping device as described in claim 2, characterized in that, The first support roller has a bolt at its lower end and is mounted on the table frame by the bolt; a bearing is installed on the first support roller and the first support roller is movably connected to the annular slide rail on the flipping frame; the second support roller has a bolt at its lower end and is mounted on the table frame by the bolt; a bearing is installed on the second support roller and the second support roller is movably connected to the annular slide rail on the flipping frame.

4. The engine cylinder head flipping device as described in claim 1, characterized in that, The rollers are located at both ends of the tilting frame and are fixed to the tilting frame by roller frames; the upper end of the tilting frame is equipped with a cylinder by a pneumatic compressor fixing plate.

5. The engine cylinder head flipping device as described in claim 1, characterized in that, It also includes a manual valve, which is mounted on a table frame. One end of the manual valve is connected to the air circuit, and the other end of the manual valve is connected to the cylinder through a pipe. The manual valve is connected to the air circuit as the power source for the cylinder.

6. The engine cylinder head flipping device as described in claim 1, characterized in that, It also includes a locking structure, which is fixed to the table frame; the top and bottom of the annular slide rail are provided with grooves, which, together with the locking structure, allow the flip frame to be accurately fixed at a specific angle when flipped.

7. The engine cylinder head flipping device as described in claim 6, characterized in that, The table frame is equipped with a support at the bottom, which is used for height adjustment.

8. The engine cylinder head flipping device as described in claim 1, characterized in that, The upper end of the roller is provided with a cylinder head tray, which includes a base plate, a valve support plate, and a positioning pin. The upper end of the base plate is provided with a valve support plate, and the side of the valve support plate is provided with a positioning pin. The positioning pin is installed on the base plate. The positioning pin cooperates with the bolt holes on the engine cylinder head to make the cylinder head sit stably on the cylinder head tray.

9. A method of using the engine cylinder head flipping device as described in any one of claims 1-8, characterized in that, Includes the following steps: The engine cylinder head to be fitted with valves is placed on the cylinder head tray. The cylinder head is then stably fixed on the tray by the bolt holes on the cylinder head and the positioning pins on the cylinder head tray. The tray with the cylinder head is then pushed along the guide rod on the tilting frame track. The guide rod is held by a pipe clamp, which is connected to the track through a pipe clamp support to guide the movement. The cylinder head is pushed from the front free roller conveyor to the designated position on the tilting frame track. At this time, the manual valve on the control table is used to move the cylinder piston downward, which drives the clamp block bracket and the bottom clamp block to move downward synchronously until the clamp block contacts the cylinder head surface and presses the cylinder head, completing the fixation before rotation. Next, unlock the locking structure and push the tilting frame. The tilting frame rolls along the bearing of the supporting roller via the annular slide rail on the outside of the tilting plate, slowly rotating the tilting frame. When the groove at the bottom of the annular slide rail aligns with the locking structure, the locking structure automatically engages in the groove, fixing the tilting frame in an inverted state, with the bottom surface of the cylinder head facing upwards. Then, operate the manual valve again to retract the cylinder piston, causing the pipe clamp block to move upwards and loosen the cylinder head. Install the intake and exhaust valves into the valve guides of the cylinder head in sequence according to the process requirements.

10. The method of using the engine cylinder head flipping device as described in claim 9, characterized in that, After the valves are installed, align the positioning pins of the cylinder head tray with the corresponding bolt holes on the bottom of the cylinder head, and check that the valve support plate on the tray is in close contact with the bottom of the cylinder head to ensure that it presses the bottom of the intake and exhaust valves tightly to prevent the valves from falling off during subsequent operations. Then, manipulate the manual valve to control the cylinder to move downwards again, clamping the cylinder head and cylinder head tray together through the pipe clamp block; unlock the locking structure, push the flipping frame in the opposite direction to rotate it to the initial direction. At this time, the cylinder head tray is in a horizontal state below the cylinder head, and the locking structure is engaged with the groove at the top of the annular slide rail to fix the flipping frame.

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