A cutter for processing a thrust surface of a cylinder head cover
By employing a limiting and buffering structure in the cutting tool used for machining the thrust surface of the cylinder head cover, the problem of screw loosening caused by tool vibration was solved, achieving stable machining and improved equipment safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING LEILIAN AUTO PARTS CO LTD
- Filing Date
- 2025-08-29
- Publication Date
- 2026-07-24
AI Technical Summary
During the machining of the thrust surface of the cylinder head cover, tool vibration can cause screws to loosen, resulting in decreased machining accuracy, equipment damage, and machining failure.
Design a tool for machining the thrust surface of a cylinder head cover. It adopts a multi-limit and buffer structure, including components such as limit blocks, buffer fasteners, rubber pins and buffer springs. The rolling friction between the limit blocks and the fixing screws and the buffer components absorb the alternating cutting force to prevent the screws from loosening.
It effectively prevents screws from loosening, ensures stable blade positioning, improves machining accuracy, reduces the risk of equipment damage, extends tool life, and reduces maintenance costs and downtime losses.
Smart Images
Figure CN224543226U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cylinder head cover processing technology, specifically a cutting tool for processing the thrust surface of a cylinder head cover. Background Technology
[0002] When machining the thrust surface of a cylinder head cover with a face milling cutter, the workpiece bottom surface or mounting reference surface is first used for positioning, and then fixed by locating pins and support blocks of a fixture. Indexable carbide or PCD face milling cutters are often used with 75° main cutting edge inserts and finishing edges. For finishing, large-diameter cutter heads are often used. The speed, feed rate, depth of cut, and other parameters are set according to the material, such as aluminum alloy or cast iron. Machining is divided into roughing and finishing. Finishing is often done with a large-diameter face milling cutter in a "one-cut" operation to ensure flatness and roughness. Alternatively, toolpath cutting can be performed as needed, and multi-edge design can be used to improve efficiency, ultimately achieving precision machining of the thrust surface.
[0003] During machining, tool vibration generates continuous alternating cutting forces. These forces repeatedly act on the screws that fix the inserts, constantly impacting the threaded joints and the threaded connection between the screws and the cutter head. This causes the friction between the threads to gradually decrease and the preload to drop, eventually leading to screw loosening. Once the screws loosen, the inserts cannot achieve stable positioning, which in turn causes a series of problems: decreased machining accuracy, such as vibration marks on the thrust surface and dimensional deviations; in severe cases, it may even cause the inserts to shift or fall off, posing a risk of equipment damage and causing machining failure. Utility Model Content
[0004] The purpose of this utility model is to provide a tool for machining the thrust surface of a cylinder head cover, which reduces and buffers the screws to prevent loosening during operation, thereby solving the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a cutting tool for machining the thrust surface of a cylinder head cover, comprising a tool body and a cutting disc. The cutting disc is fixedly connected to the bottom of the tool body. The cutting disc has several grooves inside. The cutting blade is installed at the bottom of the grooves of the cutting disc by fixing screws. A buffer fastener is provided on the upper surface of the cutting disc. An operating lever is located at the top of one side of the groove, and the operating lever and the fixing screws are symmetrically distributed at an oblique angle. The buffer fastener includes a buffer fastener cavity located inside the cutting disc. A snap-fit connector is snapped into one side of the buffer fastener cavity. A limit rod is snapped into the outer wall of the snap-fit connector. A connecting shaft is movably sleeved on both sides of the bottom of the limit rod. A limit block is fixedly installed on the outer wall of the connecting shaft. The outer wall of the limit block and the outer wall of the fixing screw fit together. A threaded cavity is threaded into the outer wall of the fixing screw. The end of the threaded cavity away from the cutting blade communicates with the interior of the buffer fastener cavity.
[0006] Preferably, a tension rod is movably sleeved inside the limiting rod, an operation button is fixedly connected to the top of the tension rod, a rubber catch is placed between the operation button and the limiting rod, the inside of the rubber catch and the top of the tension rod are engaged with each other, a piston is fixedly installed at the bottom of the tension rod, a cylinder is movably sleeved on the outer wall of the piston, an air cylinder is fixedly installed at the bottom of the air cylinder, push plugs are movably sleeved on both sides inside the air cylinder, and the outer walls of the two push plugs are fixedly connected to the top of the connecting shaft, a return spring is movably sleeved on the outer wall of the tension rod, and a positioning groove is opened on the outer wall of the limiting rod near the catch connector.
[0007] Preferably, the limiting block has an internal mounting cavity, a rotating shaft is movably fitted inside the mounting cavity, a connecting sleeve is fixedly installed at one end of the rotating shaft, a positioning seat is fixedly installed at the end of the mounting cavity away from the connecting sleeve, the outer wall of the connecting sleeve is fixedly fitted to the inside of the turntable, a driving tooth is fixedly installed on the outer wall of the turntable, a transmission block is fixedly installed on the side of the driving tooth away from the turntable, a rubber roller is fixedly installed on the outer wall of the transmission block, a limiting tooth is engaged with the bottom of the driving tooth, a guide shaft is movably fitted inside the limiting tooth, a buffer spring is movably fitted on the outer wall of the guide shaft, a resistance block A is fixedly installed on the top of the buffer spring, a resistance block B is fixedly connected to the bottom of the buffer spring, the middle part of the resistance block B is fixedly connected to the bottom of the guide shaft, and the bottom of the resistance block B is fixedly connected to the bottom of the inner cavity of the limiting block.
[0008] Preferably, a linkage block is fixedly installed on the outer wall of the snap-fit connector, a telescopic plug is fixedly installed on the outer wall of the linkage block, an air storage cylinder is movably sleeved on the outer wall of the telescopic plug, an air pipe is fixedly connected to the outer wall of the end of the air storage cylinder away from the telescopic plug, a cylinder is fixedly connected to the end of the air pipe away from the telescopic plug, an intake piston is movably sleeved inside the cylinder, a transmission rod is fixedly connected to the outer wall of the intake piston, the end of the transmission rod away from the intake piston passes through the cylinder and is fixedly connected to an operating rod, and a front resistance punch is fixedly sleeved on the outer wall of the end of the transmission rod near the operating rod, a rear resistance punch is mirrored on one end of the transmission rod, and the outer circumferential wall of the rear resistance punch is fixedly connected to the inside of the cylinder, while the inside is movably sleeved with the outer wall of the transmission rod, a storage spring is provided between the rear resistance punch and the front resistance punch, and the outer wall of the storage spring and the end of the transmission rod near the operating rod are intertwined.
[0009] Preferably, the top of the limiting tooth is at an angle to the side of the driving tooth that rotates clockwise.
[0010] Preferably, the front resistance block and the rear resistance block are symmetrically distributed on both sides of the energy storage spring, and are used to absorb the reverse force generated by the energy storage spring due to deformation and reset during tool vibration.
[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This type of tool for machining the thrust surface of the cylinder head cover effectively counteracts the impact of alternating cutting forces generated by tool vibration on the fixed insert screw through multiple limiting and buffering structures. The rolling friction between the limiting block and the fixed screw, combined with the snap-fit connector, prevents the screw from rotating counterclockwise due to vibration. The buffer assembly composed of the front resistance punch, the rear resistance punch, and the storage spring absorbs the reverse force, preventing the threaded pair from reducing friction due to continuous impact. This design significantly improves the stability of the screw and the cutter head threaded connection, ensuring that the preload is maintained for a long time, preventing the screw from loosening at the source, and thus ensuring the stable positioning of the insert, effectively avoiding the problem of decreased machining accuracy caused by insert displacement.
[0012] 2. This type of cutting tool for machining the thrust surface of the cylinder head cover, through the reset and fixing function of components such as the return spring and rubber clip, ensures that the connection accuracy between the screw and the cutting tool is not affected after maintenance. At the same time, the limiting design of rubber components such as rubber rollers and the limiting tooth buffer spring further enhances the ability to block reverse rotation and reduces the probability of cutting tool deviation or falling off. This not only reduces the risk of equipment damage and avoids production interruption due to machining failure, but also extends the service life of the cutting tool, reduces maintenance costs and downtime losses, and improves the safety and economy of the overall machining process. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the overall internal structure of the cutter head in this utility model; Figure 3 In this utility model Figure 2 A magnified schematic diagram of the overall structure at point A; Figure 4 This is a schematic diagram of the overall two-dimensional structure of the connecting shaft in this utility model; Figure 5 This is a schematic diagram of the overall disassembled structure of the limiting block in this utility model; Figure 6 This is a schematic diagram of the overall two-dimensional structure of the card connector side in this utility model.
[0014] In the diagram: 1. Tool body; 2. Tool disc; 3. Operating lever; 5. Blade; 6. Fixing screw; 7. Buffer fastener cavity; 8. Snap-fit connector; 9. Threaded cavity; 10. Limiting block; 11. Connecting shaft; 12. Limiting rod; 13. Air cylinder; 14. Push plug; 15. Cylinder; 16. Piston; 17. Return spring; 18. Positioning groove; 19. Tensioning rod; 20. Rubber retaining pin; 21. Operating button; 22. Mounting cavity; 23. Rotating shaft; 4. Connecting sleeve; 25. Positioning seat; 26. Rubber roller; 27. Transmission block; 28. Turntable; 29. Drive gear; 30. Limiting gear; 31. Guide shaft; 32. Resistance block A; 33. Resistance block B; 34. Buffer spring; 81. Linkage block; 82. Telescopic plug; 83. Air tank; 84. Air pipe; 85. Cylinder body; 86. Intake piston; 87. Transmission rod; 88. Front resistance punch; 89. Rear resistance punch; 810. Energy storage spring. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] Please see Figure 1-6 This utility model provides a technical solution for machining the thrust surface of a cylinder head cover: a tool for machining the thrust surface of a cylinder head cover includes a tool body 1 and a tool disc 2. The bottom of the tool body 1 is fixedly connected to the tool disc 2. The tool disc 2 has several grooves inside. The bottom of the circumference of the tool disc 2 is fixed by screws 6 to install the blade 5 at the bottom of the grooves. The upper surface of the tool disc 2 is provided with a buffer fastener. The operating rod 3 is located at the top of one side of the groove, and the operating rod 3 and the screws 6 are symmetrically distributed at an oblique angle. The buffer fastener includes a buffer fastener cavity 7, which is located inside the cutter head 2. A snap-fit connector 8 is snapped into one side of the buffer fastener cavity 7. A limit rod 12 is snapped into the outer wall of the snap-fit connector 8. Connecting shafts 11 are movably sleeved on both sides of the bottom of the limit rod 12. A limit block 10 is fixedly installed on the outer wall of the connecting shaft 11. The outer wall of the limit block 10 and the outer wall of the fixing screw 6 are in contact with each other. A threaded cavity 9 is threaded into the outer wall of the fixing screw 6. The end of the threaded cavity 9 away from the blade 5 is in communication with the interior of the buffer fastener cavity 7. During operation, the blade 5 is first placed inside the groove, and then the fixing screw 6 is threadedly connected to the blade 5. During connection, the fixing screw 6 passes through the threaded cavity 9 and extends into the interior of the buffer fastener cavity 7. At this time, the bottom of the limiting rod 12 is inserted into the interior of the buffer fastener cavity 7, which allows the outer wall of the limiting block 10 to form clockwise rolling friction with the outer wall of the fixing screw 6. With the help of this friction, the limiting rod 12 can quickly extend into the interior of the buffer fastener cavity 7. At the same time, the snap-fit connector 8 installed on the side will form a snap-fit with the interior of the limiting rod 12, thereby limiting the limiting rod 12 to the interior of the buffer fastener cavity 7. When the fixing screw 6 rotates counterclockwise due to vibration during operation, the limiting block 10 can stop its rotation in time and effectively absorb the force generated by the vibration of the fixing screw 6, preventing the fixing screw 6 from coming off the threaded cavity 9 and becoming loose, thus ensuring a stable improvement in work efficiency.
[0017] Example 1: A tension rod 19 is movably sleeved inside the limiting rod 12. An operation button 21 is fixedly connected to the top of the tension rod 19. A rubber catch 20 is placed between the operation button 21 and the limiting rod 12. The inside of the rubber catch 20 and the top of the tension rod 19 are engaged with each other. A piston 16 is fixedly installed at the bottom of the tension rod 19. A cylinder 15 is movably sleeved on the outer wall of the piston 16. An air cylinder 13 is fixedly installed at the bottom of the cylinder 15. Push plugs 14 are movably sleeved on both sides inside the air cylinder 13, and the outer walls of both push plugs 14 are fixedly connected to the top of the connecting shaft 11. A return spring 17 is movably sleeved on the outer wall of the tension rod 19. A positioning groove 18 is opened on the outer wall of the limiting rod 12 near the snap-fit connector 8. During operation, if it is necessary to remove the fixing screw 6 from the inside of the blade 5, the rubber clip 20 can be pulled out from the top of the tension rod 19. At this time, the original locking effect disappears, and the operation button 21 can be pushed down. During the pushing process, the tension rod 19 and piston 16 fixedly connected to the bottom of the operation button 21 will move down along the inside of the cylinder 15, thereby venting the gas in the cylinder 15 into the air cylinder 13. As the gas accumulates in the air cylinder 13, its density gradually increases, which will push the push plugs 14 at both ends to move outward. During the movement, the connecting shaft 11 fixedly connected to the outer wall of the push plug 14 will disengage from the fixing screw 6, releasing the limitation on the fixing screw 6. In this way, the fixing screw 6 can be quickly removed from the inside of the blade 5, which is convenient for subsequent disassembly and installation. After disassembly, the operation button 21 can be flipped upwards. When flipped, the tension rod 19 and piston 16, which are fixedly connected to the bottom of the operation button 21, will move upwards inside the cylinder 15. The bottom of the piston 16 will generate suction, drawing gas from the air cylinder 13 into the cylinder 15, causing the push plug 14 to move in the opposite direction, thus resetting the connecting shaft 11 as a whole. At the same time, during the upward movement of the piston 16 and tension rod 19, the return spring 17, which is movably sleeved on the outer wall of the tension rod 19, will be compressed, allowing it to initially store force. Subsequently, the rubber latch 20 will be fully engaged with the outer wall of the tension rod 19 near the operation button 21. After releasing the operation button 21, the return spring 17 will return to its original position and push the piston 16 back to its original position. Simultaneously, the operation button 21 will exert a downward compressive force on the rubber latch 20, firmly fixing the rubber latch 20 at the engagement point, preventing the tension rod 19 and operation button 21 from floating up and down due to vibration, thereby ensuring the stability of the overall structure. Example 2: The limiting block 10 has an internal mounting cavity 22. A rotating shaft 23 is movably fitted inside the mounting cavity 22. A connecting sleeve 24 is fixedly installed at one end of the rotating shaft 23. A positioning seat 25 is fixedly installed at the end of the mounting cavity 22 away from the connecting sleeve 24. The outer wall of the connecting sleeve 24 is fixedly fitted to the inside of the turntable 28. A drive tooth 29 is fixedly installed on the outer wall of the turntable 28. A transmission block 27 is fixedly installed on the side of the drive tooth 29 away from the turntable 28. A rubber roller 26 is fixedly installed on the outer wall of the transmission block 27. A limiting tooth 30 is engaged with the bottom of the drive tooth 29. A guide shaft 31 is movably fitted inside the limiting tooth 30. A buffer spring 34 is movably fitted on the outer wall of the guide shaft 31. A resistance block A32 is fixedly installed on the top of the buffer spring 34. A resistance block B33 is fixedly connected to the bottom of the buffer spring 34. The middle part of the resistance block B33 is fixedly connected to the bottom of the guide shaft 31. The bottom of the resistance block B33 is fixedly connected to the bottom of the inner cavity of the limiting block 10. In the above embodiment, when the limiting block 10 contacts the fixing screw 6, it is actually the rubber roller 26 inside that is movably installed that contacts the fixing screw 6. During the clockwise contact process, the rubber roller 26 will rotate accordingly. During the rotation, the transmission block 27 and the drive tooth 29 fixedly connected on both sides will drive the rotating shaft 23 to rotate synchronously in the mounting cavity 22 opened inside the limiting block 10. It should be noted that the top of the limiting tooth 30 faces the side of the drive tooth 29 that rotates clockwise at an angle. This design allows the drive tooth 29 to move smoothly to the top of the limiting tooth 30 during rotation and form a downward thrust, thereby pushing the resistance block A32 to move downward along the guide shaft 31. During this process, the buffer spring 34 fixedly connected to the bottom of the resistance block A32 will be compressed, and the compression can form an initial force storage. When the limiting tooth 30 moves into the next groove, the buffer... Spring 34 generates a rebound force, causing the limiting tooth 30 to engage in the groove, thus achieving the limiting effect. When the fixing screw 6 rotates in the reverse direction to tighten or loosen, it pushes the rubber roller 26 to rotate in the reverse direction. At this time, the transmission block 27 and drive tooth 29 fixedly connected to the rubber roller 26 will also rotate in the reverse direction. However, since the side of the limiting tooth 30 facing the drive tooth 29 that rotates in the reverse direction is not at an angle, the drive tooth 29 cannot cut into the top of the limiting tooth 30 and push the limiting tooth 30 downward, thus forming a limit and preventing the fixing screw 6 from rotating in the reverse direction. In addition, the rubber roller 26 is a rubber component, which can absorb the force generated by vibration during contact with the fixing screw 6. It should also be noted that the resistance block A32 and resistance block B33 can absorb the force generated by the buffer spring 34 after being subjected to force during vibration, preventing the buffer spring 34 from fatigued due to long-term work, thereby helping to enhance the limiting effect.
[0018] Example 3: A linkage block 81 is fixedly installed on the outer wall of the snap-fit connector 8. A telescopic plug 82 is fixedly installed on the outer wall of the linkage block 81. An air reservoir 83 is movably sleeved on the outer wall of the telescopic plug 82. An air pipe 84 is fixedly connected to the outer wall of the end of the air reservoir 83 away from the telescopic plug 82. A cylinder 85 is fixedly connected to the end of the air pipe 84 away from the telescopic plug 82. An intake piston 86 is movably sleeved inside the cylinder 85. A transmission rod 87 is fixedly connected to the outer wall of the intake piston 86. The end of the transmission rod 87 away from the intake piston 86 passes through the cylinder 85 and... A fixed connection is made to the operating lever 3, and a front resistance punch 88 is fixedly sleeved on the outer wall of the transmission rod 87 near the operating lever 3. A rear resistance punch 89 is mirror-imagely disposed on one end of the transmission rod 87, and the outer circumferential wall of the rear resistance punch 89 is fixedly connected to the inside of the cylinder 85, while the inside is movably sleeved with the outer wall of the transmission rod 87. A storage spring 810 is disposed between the rear resistance punch 89 and the front resistance punch 88, and the outer wall of the storage spring 810 is intertwined with the end of the transmission rod 87 near the operating lever 3. During operation, the locking connector 8 and the limiting rod 12 need to be placed inside the buffer fastener cavity 7. At this time, the operating rod 3 can be pulled outward. During the pulling process, the transmission rod 87 and the suction piston 86 will move away from the end of the air pipe 84. The energy storage spring 810, which is movably sleeved on the outer wall of the transmission rod 87, will be squeezed by the front resistance punch 88, thus completing the initial energy storage. At the same time, the side of the suction piston 86 near the air pipe 84 will generate suction, causing the air pipe 84 to pull the telescopic plug 82 towards itself. As the telescopic plug 82 is pulled, the linkage block 81 and the locking connector 8, which are fixedly connected to its outer wall, will be retracted into the air storage cylinder 83. At this time, the limiting rod 12 The entire assembly can then be placed into the buffer fastener cavity 7. After releasing the operating lever 3, the energy storage spring 810 will reset. During the reset, it will push the front resistance punch 88 forward, causing the intake piston 86 to discharge the drawn-in gas through the air pipe 84 into the air storage cylinder 83 for storage. At the same time, the telescopic plug 82 will be pushed out by the gas, causing the snap-fit connector 8, which is fixedly connected to the linkage block 81, to be embedded into the limiting groove positioning groove 18, forming a limit to prevent movement during operation. It should be noted that the function of the front resistance punch 88 and the rear resistance punch 89 is to absorb the reverse force of the energy storage spring 810 during vibration, thereby ensuring the fixation effect of the overall structure.
[0019] Working principle: When using, Tool assembly and fixing: The blade 5 is fitted into the groove of the tool disc 2 and connected to the blade 5 by a fixing screw 6. The fixing screw 6 extends through the threaded cavity 9 into the buffer fastener cavity 7. The bottom of the limiting rod 12 is inserted into the buffer fastener cavity 7. The limiting block 10 and the fixing screw 6 form clockwise rolling friction, causing the limiting rod 12 to enter quickly. The snap-fit connector 8 engages with the limiting rod 12 to achieve limiting. This process, through friction and snap-fit, ensures that the fixing screw 6 and other components are initially fixed, and the limiting block 10 can prevent the fixing screw 6 from rotating counterclockwise due to vibration. Disassembly and Reset Operations: For disassembly, pull out the rubber retaining pin 20 and push the operation button 21 to move the piston 16 of the tension rod 19 downwards. Gas in the cylinder 15 is discharged into the air cylinder 13, pushing the push plug 14 outwards. The connecting shaft 11 disengages from the fixing screw 6, releasing its limit and facilitating the removal of the fixing screw 6. For reset, push the operation button 21 upwards. The piston 16 generates suction, drawing the gas back into the cylinder 15. The push plug 14 drives the connecting shaft 11 to reset. The reset spring 17, after compressing and storing force, pushes the piston 16 back to its original position. The rubber retaining pin 20 secures the tension rod 19 and operation button 21, preventing them from floating. Limiting reinforcement and stability assurance: Pulling the operating lever 3 moves the transmission rod 87 and the suction piston 86, compressing the energy storage spring 810 and generating suction force to pull the telescopic plug 82. The linkage block 81 and the locking connector 8 are retracted into the air storage cylinder 83, and the limiting rod 12 is placed into the buffer fastener cavity 7. After releasing the operating lever 3, the energy storage spring 810 returns to its original position and pushes the front resistance punch 88. Gas is stored in the air storage cylinder 83 and pushes out the telescopic plug 82. The locking connector 8 is embedded in the limiting groove and positioning groove 18 to form a limit. The front resistance punch 88 and the rear resistance punch 89 absorb the reverse force. The rubber roller 26 and other components are reinforced by structural design to enhance the limiting and jointly ensure the overall stability.
Claims
1. A tool for machining the thrust surface of a cylinder head cover, comprising a tool body (1) and a cutter disc (2), wherein the bottom of the tool body (1) is fixedly connected to the cutter disc (2), and the cutter disc (2) has a plurality of grooves inside, characterized in that: The blade (5) is installed in the bottom of the groove of the cutter head (2) by fixing screws (6) at the bottom of the circumference of the cutter head (2). The upper surface of the cutter head (2) is provided with buffer fasteners. The operating rod (3) is located at the top of one side of the groove, and the operating rod (3) and the fixing screw (6) are symmetrically distributed at an oblique angle. The buffer fastener includes a buffer fastener cavity (7), which is located inside the cutter head (2). A snap-fit connector (8) is snapped into one side of the buffer fastener cavity (7). A limit rod (12) is snapped into the outer wall of the snap-fit connector (8). A connecting shaft (11) is movably sleeved on both sides of the bottom of the limit rod (12). A limit block (10) is fixedly installed on the outer wall of the connecting shaft (11). The outer wall of the limit block (10) and the outer wall of the fixing screw (6) are in contact with each other. A threaded cavity (9) is threaded into the outer wall of the fixing screw (6). The end of the threaded cavity (9) away from the blade (5) is in communication with the interior of the buffer fastener cavity (7).
2. The cutting tool for machining the thrust surface of a cylinder head cover according to claim 1, characterized in that: The limiting rod (12) is movably sleeved with a tension rod (19). The top of the tension rod (19) is fixedly connected with an operation button (21). A rubber pin (20) is placed between the operation button (21) and the limiting rod (12). The inside of the rubber pin (20) and the top of the tension rod (19) are interlocked. A piston (16) is fixedly installed at the bottom of the tension rod (19). A cylinder (15) is movably sleeved on the outer wall of the piston (16). An air cylinder (13) is fixedly installed at the bottom of the cylinder (15). Push plugs (14) are movably sleeved on both sides of the air cylinder (13). The outer walls of the two push plugs (14) are fixedly connected to the top of the connecting shaft (11). A return spring (17) is movably sleeved on the outer wall of the tension rod (19). A positioning groove (18) is opened on the outer wall of the limiting rod (12) near the snap-fit connector (8).
3. The cutting tool for machining the thrust surface of a cylinder head cover according to claim 1, characterized in that: The limiting block (10) has an internal mounting cavity (22). A rotating shaft (23) is movably sleeved inside the mounting cavity (22). A connecting sleeve (24) is fixedly installed at one end of the rotating shaft (23). A positioning seat (25) is fixedly installed at the end of the mounting cavity (22) away from the connecting sleeve (24). The outer wall of the connecting sleeve (24) is fixedly sleeved to the inside of the turntable (28). A driving tooth (29) is fixedly installed on the outer wall of the turntable (28). A transmission block (27) is fixedly installed on the side of the driving tooth (29) away from the turntable (28). The outer wall of the transmission block (27) is fixedly... A rubber roller (26) is installed, and a limiting tooth (30) is engaged at the bottom of the drive tooth (29). A guide shaft (31) is movably sleeved inside the limiting tooth (30). A buffer spring (34) is movably sleeved on the outer wall of the guide shaft (31). A resistance block A (32) is fixedly installed on the top of the buffer spring (34). A resistance block B (33) is fixedly connected to the bottom of the buffer spring (34). The middle part of the resistance block B (33) is fixedly connected to the bottom of the guide shaft (31). The bottom of the resistance block B (33) is fixedly connected to the bottom of the inner cavity of the limiting block (10).
4. The cutting tool for machining the thrust surface of a cylinder head cover according to claim 1, characterized in that: A linkage block (81) is fixedly installed on the outer wall of the snap-fit connector (8). A telescopic plug (82) is fixedly installed on the outer wall of the linkage block (81). An air storage cylinder (83) is movably sleeved on the outer wall of the telescopic plug (82). An air pipe (84) is fixedly connected to the outer wall of the end of the air storage cylinder (83) away from the telescopic plug (82). A cylinder body (85) is fixedly connected to the end of the air pipe (84) away from the telescopic plug (82). An intake piston (86) is movably sleeved inside the cylinder body (85). A transmission rod (87) is fixedly connected to the outer wall of the intake piston (86). The end of the transmission rod (87) away from the intake piston (86) passes through... The cylinder body (85) is fixedly connected to the operating rod (3), and a front resistance punch (88) is fixedly sleeved on the outer wall of the end of the transmission rod (87) near the operating rod (3). A rear resistance punch (89) is mirrored on one end of the transmission rod (87), and the outer circumferential wall of the rear resistance punch (89) is fixedly connected to the inside of the cylinder body (85), while the inside is movably sleeved with the outer wall of the transmission rod (87). A storage spring (810) is provided between the rear resistance punch (89) and the front resistance punch (88), and the outer wall of the storage spring (810) and the end of the transmission rod (87) near the operating rod (3) are intertwined.
5. The cutting tool for machining the thrust surface of a cylinder head cover according to claim 3, characterized in that: The top of the limiting tooth (30) is angled toward the side of the driving tooth (29) that rotates clockwise.
6. The cutting tool for machining the thrust surface of a cylinder head cover according to claim 4, characterized in that: The front resistance block (88) and the rear resistance block (89) are symmetrically distributed on both sides of the energy storage spring (810) to absorb the reverse force generated by the deformation and reset of the energy storage spring (810) during the vibration of the tool.