Precision reaming tool for valve seat ring hole and guide pipe hole of cylinder cover

Abstract

The utility model discloses a cylinder cover valve seat ring hole and guide pipe hole finish reaming tool which comprises an installation frame, a driving assembly is arranged at the bottom of the installation frame, a plurality of rotating shafts are arranged in the installation frame in a rotating mode, the rotating shafts are all arranged in the installation frame in a rotating mode, and the driving assembly is connected with the driving assembly. And a conveying chain wheel is fixedly arranged on the surface of the rotating shaft. The hydraulic push rod drives the fixing plate to reset, so that the cylinder cover falls onto the conveying chain, the cylinder cover subjected to finish reaming is moved out of the limiting plate through the conveying chain, the cylinder cover which is not subjected to finish reaming is moved into the limiting plate, and the cylinder cover which is not subjected to finish reaming is jacked up and fixed through the hydraulic push rod and the fixing plate; therefore, the cylinder cover valve seat ring hole and the guide pipe hole can be continuously and finely reamed, the situation that the cylinder cover needs to be taken and placed with much time is avoided, and the speed of the fine reaming process of the cylinder cover valve seat ring hole and the guide pipe hole is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of precision reaming, in particular to a precision reaming tooling for valve seat holes and guide holes of a cylinder head. Background Technique

[0002] The function of the cylinder head is to seal the cylinder, jointly form a combustion space with the piston, and bear the action of high-temperature and high-pressure combustion gas. The cylinder head bears the gas force and the mechanical load caused by tightening the cylinder bolts. At the same time, it also bears a very high thermal load due to contact with high-temperature combustion gas. In order to ensure good sealing of the cylinder, the cylinder head should neither be damaged nor deformed. For this reason, the cylinder head should have sufficient strength and stiffness. The cylinder head is a box-shaped part with a complex structure, on which intake and exhaust valve seat holes, valve guide holes, spark plug mounting holes (for gasoline engines) or injector mounting holes are processed. A water jacket, intake and exhaust channels, and a combustion chamber or a part of the combustion chamber are also cast in the cylinder head. If the camshaft is installed on the cylinder head, then cam bearing holes or cam bearing seats and their lubricating oil channels are also processed on the cylinder head.

[0003] For the valve seat holes and guide holes on the cylinder head, sufficient precision needs to be maintained. Therefore, it is necessary to perform precision reaming on the valve seat holes and guide holes of the cylinder head. During the precision reaming process, according to the existing processing equipment, it includes a base and a column arranged on the base. A gland is arranged on the column, and a guide rail is arranged on the base. The workpiece moves through the guide rail into the space surrounded by the gland, the column and the base. After a cylinder head is precision reamed, it needs to be removed before the next cylinder head can be put in. However, too much time will be wasted during the above operation process. Therefore, a precision reaming tooling for valve seat holes and guide holes of a cylinder head is proposed. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a precision reaming tooling for valve seat holes and guide holes of a cylinder head to solve the problems raised in the above background technique.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A precision reaming tooling for valve seat holes and guide holes of a cylinder head includes an installation frame. A driving component is arranged at the bottom of the installation frame. A rotating shaft is rotatably arranged inside the installation frame. The number of the rotating shafts is several, and several rotating shafts are all rotatably arranged inside the installation frame. A conveying sprocket is fixedly arranged on the surface of the rotating shaft. A conveying chain is meshed on the surface of the conveying sprocket. A fixing component for facilitating the fixation of the cylinder head is arranged inside the installation frame. A limiting plate for facilitating the use of the fixing component is fixedly arranged at the top of the installation frame. A precision reaming component for facilitating the precision reaming of the valve seat holes and guide holes of the cylinder head is arranged at the top of the limiting plate.

[0007] Preferably, the driving assembly includes a mounting plate fixedly installed at the bottom of the mounting frame. A driving motor is fixedly arranged at the rear side of the mounting plate. The output end of the driving motor is fixedly provided with a driving transmission wheel. A transmission belt is meshed inside the driving transmission wheel. A driven transmission wheel is meshed inside the transmission belt. A connecting shaft is fixedly arranged inside the driven transmission wheel. The connecting shaft is fixedly installed at the front end of the rotating shaft on the right side.

[0008] Preferably, the fixing assembly includes a hydraulic push rod fixedly installed at the bottom of the mounting frame. The output end of the hydraulic push rod is fixedly provided with a fixing plate. A guiding rod is fixedly arranged at the bottom of the fixing plate. The guiding rod is slidably arranged inside the mounting frame. A connecting circular plate is fixedly arranged at the bottom of the guiding rod. A buffer spring is fixedly arranged at the top of the connecting circular plate. The top end of the buffer spring is fixedly installed at the bottom of the mounting frame.

[0009] Preferably, the fine reaming assembly includes a linear motor 1 fixedly installed at the top of the limiting plate. A moving seat 1 is arranged on the limiting plate. A gantry is fixedly arranged at the top of the moving seat 1. An electric push rod is fixedly arranged at the top of the gantry. The output end of the electric push rod is fixedly provided with a linear motor 2. A moving seat 2 is arranged on the linear motor 2. A connecting plate is fixedly arranged at the bottom of the moving seat 2. A rotating motor is fixedly arranged at the top of the connecting plate. The output of the rotating motor is fixedly provided with a fine reaming cutter.

[0010] Preferably, the number of the conveying sprockets is several, and two conveying sprockets form a group. Multiple groups of the conveying sprockets are distributed in a linear array.

[0011] Preferably, the number of the guiding rods is two, and the two guiding rods are symmetrically distributed. The guiding rods are made of metal.

[0012] Preferably, the fixing plate is in a rectangular structure. The fixing plate is made of metal. The fixing plate is not in contact with the conveying sprockets and the conveying chain.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: For the fine reaming tooling for the valve seat ring holes and guide holes of the cylinder head, the driving assembly drives the rotating shaft to drive the conveying sprocket to rotate, so that the conveying chain drives the cylinder head that needs to be fine reamed for the valve seat ring holes and guide holes to move above the fixing plate, and the hydraulic push rod drives the fixing plate to drive the cylinder head to contact the limiting plate to fix the position of the cylinder head. Then, the fine reaming assembly fine reams the valve seat ring holes and guide holes of the cylinder head. When the fine reaming is completed, the hydraulic push rod drives the fixing plate to reset, so that the cylinder head falls onto the conveying chain. The conveying chain moves the cylinder head that has been fine reamed out of the limiting plate, and moves the cylinder head that has not been fine reamed into the limiting plate, and the hydraulic push rod and the fixing plate jack up and fix the cylinder head that has not been fine reamed. Thus, the valve seat ring holes and guide holes of the cylinder head can be continuously fine reamed, avoiding the need to spend a lot of time on the picking and placing of the cylinder head. Therefore, the speed of the fine reaming process for the valve seat ring holes and guide holes of the cylinder head is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an isometric view of the structure of the present utility model;

[0015] Figure 2 It is a schematic diagram of a partial structure of the structure of the present utility model;

[0016] Figure 3 It is a front sectional view of a partial structure of the structure of the present utility model;

[0017] Figure 4 It is a schematic diagram of the structure of the fine reaming assembly of the structure of the present utility model.

[0018] In the figure: 1. Installation frame; 2. Installation plate; 3. Driving motor; 4. Active transmission wheel; 5. Transmission belt; 6. Driven transmission wheel; 7. Connecting shaft; 8. Rotating shaft; 9. Conveying sprocket; 10. Conveying chain; 11. Hydraulic push rod; 12. Fixing plate; 13. Guide rod; 14. Connecting circular plate; 15. Buffer spring; 16. Limiting plate; 17. Linear motor one; 18. Moving seat one; 19. Gantry; 20. Electric push rod; 21. Linear motor two; 22. Moving seat two; 23. Connecting plate; 24. Rotating motor; 25. Fine reaming cutter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Refer to Figures 1-4, A precision reaming tool for the valve seat ring holes and guide holes of a cylinder head, including an installation frame 1. A driving component is arranged at the bottom of the installation frame 1. A rotating shaft 8 is rotatably arranged inside the installation frame 1. The number of rotating shafts 8 is several, and several rotating shafts 8 are all rotatably arranged inside the installation frame 1. A conveying sprocket 9 is fixedly arranged on the surface of the rotating shaft 8. A conveying chain 10 is meshed on the surface of the conveying sprocket 9. The number of conveying sprockets 9 is several, and two conveying sprockets 9 are a group. Multiple groups of conveying sprockets 9 are distributed in a linear array. Through the arrangement of several conveying sprockets 9, it is convenient to support the conveying chain 10, avoiding the depression of the conveying chain 10 after being placed in the cylinder head, and avoiding the fracture of the conveying chain 10 due to excessive depression. A fixing component for conveniently fixing the cylinder head is arranged inside the installation frame 1. A limiting plate 16 for conveniently assisting the use of the fixing component is fixedly arranged at the top of the installation frame 1. The fixing component includes a hydraulic push rod 11. The hydraulic push rod 11 is fixedly installed at the bottom of the installation frame 1. The output end of the hydraulic push rod 11 is fixedly provided with a fixing plate 12. The fixing plate 12 is of a rectangular structure and is made of metal material. The fixing plate 12 does not contact the conveying sprocket 9 and the conveying chain 10. The metal-made fixing plate 12 is not easily damaged and does not contact the conveying sprocket 9 and the conveying chain 10, avoiding the fixing plate 12 from blocking the driving of the conveying chain 10 by the conveying sprocket 9, thus facilitating the conveying chain 10 to drive the cylinder head to move. A guide rod 13 is fixedly arranged at the bottom of the fixing plate 12. The number of guide rods 13 is two, and the two guide rods 13 are symmetrically distributed. The guide rod 13 is made of metal material. Through the guide rod 13, it is convenient to limit and guide the fixing plate 12, making the movement of the fixing plate 12 more stable. The guide rod 13 is slidably arranged inside the installation frame 1. A connecting circular plate 14 is fixedly arranged at the bottom of the guide rod 13. A buffer spring 15 is fixedly arranged at the top of the connecting circular plate 14. The top end of the buffer spring 15 is fixedly installed at the bottom of the installation frame 1. By driving the fixing plate 12 to move up or down through the hydraulic push rod 11, the fixing plate 12 drives the cylinder head to separate from the conveying chain 10 and contact the limiting plate 16, or drives the cylinder head after precision reaming to contact the conveying chain 10. And when the output end of the hydraulic push rod 11 drives and pushes the fixing plate 12 to move, the fixing plate 12 drives the connecting circular plate 14 to compress the buffer spring 15 through the guide rod 13, thereby buffering the fixing plate 12 and avoiding the collision between the fixing plate 12 and the cylinder head. A precision reaming component for conveniently precision reaming the valve seat ring holes and guide holes of the cylinder head is arranged at the top of the limiting plate 16. By driving the driving component to drive the rotating shaft 8 to drive the conveying sprocket 9 to rotate, the conveying chain 10 drives the cylinder head that needs to precision ream the valve seat ring holes and guide holes to move above the fixing plate 12, and the hydraulic push rod 11 is driven to drive the fixing plate 12 to drive the cylinder head to contact the limiting plate 16 to fix the position of the cylinder head, and then the precision reaming component is used to precision ream the valve seat ring holes and guide holes of the cylinder head. When the precision reaming is completed, the hydraulic push rod 11 drives the fixing plate 12 to reset.The cylinder head is made to fall onto the conveying chain 10. The cylinder head that has completed fine reaming is removed from within the limit plate 16 by the conveying chain 10, and the cylinder head that has not been fine reamed is moved inside the limit plate 16. The cylinder head that has not been fine reamed is jacked up and fixed by the hydraulic push rod 11 and the fixing plate 12, so that the valve seat holes and guide holes of the cylinder head can be continuously fine reamed, avoiding the need to spend a lot of time on the picking and placing of the cylinder head. Therefore, the speed of the fine reaming process for the valve seat holes and guide holes of the cylinder head is increased.

[0021] Specifically, the driving assembly includes a mounting plate 2. The mounting plate 2 is fixedly installed at the bottom of the mounting frame 1. A driving motor 3 is fixedly arranged at the rear side of the mounting plate 2. A driving transmission wheel 4 is fixedly arranged at the output end of the driving motor 3. A transmission belt 5 is meshed inside the driving transmission wheel 4. A driven transmission wheel 6 is meshed inside the transmission belt 5. A connecting shaft 7 is fixedly arranged inside the driven transmission wheel 6. The connecting shaft 7 is fixedly installed at the front end of the rotating shaft 8 on the right side. The driving motor 3 drives the connecting shaft 7 to rotate through the driving transmission wheel 4, the transmission belt 5 and the driven transmission wheel 6, so that the connecting shaft 7 drives the rotating shaft 8 to rotate, thereby facilitating the conveying sprocket 9 to drive the conveying chain 10 to drive the cylinder head to move.

[0022] Specifically, the fine reaming assembly includes a linear motor one 17. The linear motor one 17 is fixedly installed at the top of the limit plate 16. A moving seat one 18 is arranged on the limit plate 16. A gantry 19 is fixedly arranged at the top of the moving seat one 18. An electric push rod 20 is fixedly arranged at the top of the gantry 19. A linear motor two 21 is fixedly arranged at the output end of the electric push rod 20. A moving seat two 22 is arranged on the linear motor two 21. A connecting plate 23 is fixedly arranged at the bottom of the moving seat two 22. A rotating motor 24 is fixedly arranged at the top of the connecting plate 23. A fine reaming cutter 25 is fixedly arranged at the output of the rotating motor 24. Through the settings of the linear motor one 17, the moving seat one 18, the linear motor two 21 and the moving seat two 22, it is convenient to control the left - right movement and the front - back movement of the connecting plate 23, so that the connecting plate 23 drives the fine reaming cutter 25 to move through the rotating motor 24, thereby facilitating the fine reaming treatment of the valve seat holes and guide holes at different positions of the cylinder head. Among them, the up - down movement of the linear motor two 21 and the moving seat two 22 is controlled by the electric push rod 20, so that the connecting plate 23 drives the fine reaming cutter 25 to move up and down through the rotating motor 24.

[0023] This fine reaming tooling for the valve seat holes and guide holes of the cylinder head is connected to the 220V mains electricity, and the main controller can be a conventional known device such as a computer for control.

[0024] During use: Place the cylinder head that needs to be precisely reamed for the valve seat ring hole and the guide hole on the top of the conveying chain 10. Drive the output end of the driving motor 3 to drive the driving sprocket 4 to rotate, so that the driving sprocket 4 drives the driven sprocket 6 to rotate through the transmission belt 5, and drives the rotating shaft 8 to rotate through the connecting shaft 7. Drive the conveying sprocket 9 to rotate through the rotating shaft 8, so that the conveying sprocket 9 drives the engaged conveying chain 10 to move, thereby driving the cylinder head to move by the conveying chain 10. When the cylinder head moves above the fixed plate 12, the driving motor 3 stops. Drive the output end of the hydraulic push rod 11 to push the fixed plate 12 upward, and guide the fixed plate 12 through the guide rod 13, so that the fixed plate 12 pushes the cylinder head into contact with the inside of the limiting plate 16, thereby fixing the position of the cylinder head. Then drive the moving seat 18 by the linear motor 1 to drive the gantry 19 to move, so that the gantry 19 drives the linear motor 2 to move through the electric push rod 20. The linear motor 2 drives the connecting plate 23 to move through the moving seat 22, so that the connecting plate 23 drives the reaming cutter 25 to move through the rotating motor 24. Then drive the moving seat 22 by the linear motor 2 to drive the connecting plate 23 to move, so that the rotating motor 24 drives the reaming cutter 25 to move directly above the valve seat ring hole and the guide hole of the cylinder head, and drive the output end of the rotating motor 24 to drive the reaming cutter 25 to rotate. At the same time, drive the output end of the electric push rod 20 to push the linear motor 2 downward, so that the linear motor 2 drives the connecting plate 23 to move downward through the moving seat 22, so that the rotating motor 24 drives the reaming cutter 25 to enter the valve seat ring hole and the guide hole of the cylinder head, thereby calibrating the valve seat ring hole and the guide hole of the cylinder head. And when the reaming of one cylinder head is completed, drive the fixed plate 12 to reset by the hydraulic push rod 11, so that the cylinder head contacts the conveying chain 10. Drive the conveying chain 10 to drive the conveying sprocket 9 to rotate through the driving component, so that the conveying chain 10 moves the reamed cylinder head out of the limiting plate 16 and conveys the unreamed cylinder head into the limiting plate 16.

[0025] In summary, for the fine reaming tooling for the valve seat ring holes and guide holes of the cylinder head, the driving assembly drives the rotating shaft 8 to drive the conveying sprocket 9 to rotate, so that the conveying chain 10 drives the cylinder head that needs to be fine reamed for the valve seat ring holes and guide holes to move above the fixed plate 12, and the hydraulic push rod 11 drives the fixed plate 12 to drive the cylinder head into contact with the limiting plate 16 to fix the position of the cylinder head. Then, the fine reaming assembly is used to fine ream the valve seat ring holes and guide holes of the cylinder head. When the fine reaming is completed, the hydraulic push rod 11 drives the fixed plate 12 to reset, so that the cylinder head falls onto the conveying chain 10. The conveying chain 10 moves the cylinder head that has been fine reamed out of the limiting plate 16, and moves the cylinder head that has not been fine reamed into the limiting plate 16, and the hydraulic push rod 11 and the fixed plate 12 jack up and fix the cylinder head that has not been fine reamed. Thus, the valve seat ring holes and guide holes of the cylinder head can be continuously fine reamed, avoiding the need to spend more time on the picking and placing of the cylinder head. Therefore, the speed of the fine reaming process for the valve seat ring holes and guide holes of the cylinder head is increased, which is used to solve the problems raised in the above-mentioned background technology.

[0026] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0027] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fine-reaming tool for a cylinder head valve seat ring hole and a guide tube hole, comprising a mounting frame (1), characterized in that: A driving assembly is arranged at the bottom of the installation frame (1); a rotating shaft (8) is rotatably arranged inside the installation frame (1); the number of the rotating shafts (8) is several, and the several rotating shafts (8) are all rotatably arranged inside the installation frame (1); a conveying sprocket (9) is fixedly arranged on the surface of the rotating shaft (8); a conveying chain (10) is meshingly arranged on the surface of the conveying sprocket (9); a fixing assembly for fixing the cylinder head is arranged inside the installation frame (1); a limiting plate (16) for auxiliary use of the fixing assembly is fixedly arranged on the top of the installation frame (1); a fine reaming assembly for fine reaming of the valve seat ring hole and the guide tube hole of the cylinder head is arranged on the top of the limiting plate (16).

2. A fine-reaming tool for the valve seat ring hole and the guide tube hole of a cylinder head according to claim 1, characterized in that: The driving assembly comprises a mounting plate (2), wherein the mounting plate (2) is fixedly mounted on the bottom of the mounting frame (1), a driving motor (3) is fixedly arranged on the rear side of the mounting plate (2), an active transmission wheel (4) is fixedly arranged on the output end of the driving motor (3), a transmission belt (5) is meshedly arranged inside the active transmission wheel (4), a driven transmission wheel (6) is meshedly arranged inside the transmission belt (5), a connecting shaft (7) is fixedly arranged inside the driven transmission wheel (6), and the connecting shaft (7) is fixedly mounted on the front end of the rotating shaft (8) on the right side.

3. The fine-reaming tool for the valve seat ring hole and the guide tube hole of a cylinder head according to claim 1, characterized in that: The fixing assembly comprises a hydraulic push rod (11), wherein the hydraulic push rod (11) is fixedly mounted on the bottom of the mounting frame (1), a fixing plate (12) is fixedly mounted on the output end of the hydraulic push rod (11), a guide rod (13) is fixedly mounted on the bottom of the fixing plate (12), the guide rod (13) is slidably mounted inside the mounting frame (1), a connecting circular plate (14) is fixedly mounted on the bottom of the guide rod (13), a buffer spring (15) is fixedly mounted on the top of the connecting circular plate (14), and the top end of the buffer spring (15) is fixedly mounted on the bottom of the mounting frame (1).

4. The fine-reaming tool for the valve seat ring hole and the guide tube hole of a cylinder head according to claim 1, characterized in that: The precision reaming assembly comprises a linear motor (17), wherein the linear motor (17) is fixedly mounted on the top of a limit plate (16), a movable seat (18) is arranged on the limit plate (16), a gantry (19) is fixedly arranged on the top of the movable seat (18), an electric push rod (20) is fixedly arranged on the top of the gantry (19), a linear motor (21) is fixedly arranged on the output end of the electric push rod (20), a movable seat (22) is arranged on the linear motor (21), a connecting plate (23) is fixedly arranged on the bottom of the movable seat (22), a rotating motor (24) is fixedly arranged on the top of the connecting plate (23), and a precision reamer (25) is fixedly arranged on the output of the rotating motor (24).

5. The fine-reaming tool for the valve seat ring hole and the guide tube hole of a cylinder head according to claim 1, characterized in that: The number of the conveying sprockets (9) is several, and two conveying sprockets (9) form a group, and the multiple groups of conveying sprockets (9) are distributed in a linear array.

6. The fine-reaming tool for the valve seat ring hole and the guide tube hole of a cylinder head according to claim 3, characterized in that: The number of the guide rods (13) is two, and the two guide rods (13) are symmetrically distributed. The guide rods (13) are made of metal material.

7. The fine-reaming tool for the valve seat ring hole and the guide tube hole of a cylinder head according to claim 3, characterized in that: The fixing plate (12) has a rectangular structure and is made of a metal material. The fixing plate (12) is not in contact with the conveying sprocket (9) and the conveying chain (10).

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