An engine stepped deep-hole bowl-shaped plug removal tool and method

Abstract

The present invention relates to an engine stepped deep hole bowl-shaped plug removal tool and method, which includes: a guide sleeve for being installed in a through hole of the engine, and a guide hole is provided on the guide sleeve; a punch, which includes a punch guide rod matching the guide hole and a punch head provided at one end of the punch guide rod, and the punch head is used for punching the bowl-shaped plug; and a pull rod, which has a pull rod head for passing through the punched hole of the bowl-shaped plug and pulling out the bowl-shaped plug. By using the guide sleeve to guide the punch, after punching the bowl-shaped plug with the punch, then using the pull rod to pass through the hole to pull out the bowl-shaped plug. Since the size of the tool can be determined by the size of the bowl-shaped plug, it can be applicable to bowl-shaped plugs with different diameters. Because the impact force and pulling force applied to the bowl-shaped plug are along the axial direction, the tool is generally not easy to break. By passing the pull rod through the punched hole and abutting against the bottom of the bowl-shaped plug to pull out the bowl-shaped plug, the pulling force on the bowl-shaped plug is relatively reliable and the success rate is high.

Description

Technical Field

[0001] The present invention relates to the technical field of engine cylinder block and cylinder head processing technology, and particularly relates to an engine stepped deep hole bowl-shaped plug removal tool and method. Background Art

[0002] Currently, during the repair process of the engine bowl-shaped plug hole, the most important thing is to remove the bowl-shaped plug. However, limited by its interference fit, space limitation, etc., it is very difficult to remove the bowl-shaped plug.

[0003] In the related art, a lever mechanism is formed by designing upper and lower clamping seats through a hinge. By screwing the rear-end bolt, the protrusion at the front end of the clamping seat expands and squeezes the bowl-shaped plug, and finally a pin puller is used to pull out the bowl-shaped plug. This method has the following disadvantages: it is not applicable to small-diameter bowl-shaped plugs, and if the tightening force is too large, the tool is easily broken; the protrusion at the front end of the clamping seat is designed with a triangular cross-section edge, and the clamping force on the bowl-shaped plug is unreliable; simply relying on the tightening method to pull out the bowl-shaped plug is unreliable and the success rate is low. Summary of the Invention

[0004] An embodiment of the present invention provides an engine stepped deep hole bowl-shaped plug removal tool and method to solve the problems in the related art that it is not applicable to small-diameter bowl-shaped plugs, the clamping force on the bowl-shaped plug is unreliable, and the success rate is low.

[0005] In a first aspect, an engine stepped deep hole bowl-shaped plug removal tool is provided, which includes: a guide sleeve for being installed in an opening of an engine, and a guide hole is provided on the guide sleeve; a punch including a punch guide rod matching with the guide hole and a punch head provided at one end of the punch guide rod, and the punch head is used for punching the bowl-shaped plug; and a pull rod having a pull rod head for passing through the punched hole of the bowl-shaped plug and pulling out the bowl-shaped plug.

[0006] In some embodiments, the pull rod includes a pull rod guide rod matching with the guide hole, and a thread is provided at one end of the pull rod guide rod, and the thread is used to cooperate with a nut to drive the pull rod to pull out the bowl-shaped plug.

[0007] In some embodiments, the length of the pull rod head is greater than the diameter of the pull rod guide rod, and the width of the pull rod head is less than the diameter of the pull rod guide rod; a through hole matching with the pull rod head is provided on the guide sleeve, and the through hole is communicated with the guide hole.

[0008] In some embodiments, the pull rod head is connected to the pull rod guide rod through a connecting rod, and both ends of the pull rod head extend obliquely towards the direction close to the thread.

[0009] In some embodiments, the punch head has a first inclined surface and a second inclined surface. The first inclined surface extends obliquely from the punch guide rod towards the direction close to its axis, and the second inclined surface extends obliquely from the first inclined surface towards the direction close to its axis, and the slope of the second inclined surface is less than that of the first inclined surface.

[0010] In some embodiments, the guide sleeve has a mounting portion for passing through the opening. One end of the mounting portion is provided with a stopping portion for stopping outside the opening, and the size of the stopping portion is larger than that of the mounting portion.

[0011] In a second aspect, a method for removing a stepped deep-hole bowl-shaped plug of an engine is provided, which includes the following steps: installing the guide sleeve in the opening of the engine; passing the punch through the guide hole of the guide sleeve, applying an impact force to the punch to drive the punch head to punch the bowl-shaped plug; passing the pull rod head of the pull rod through the punched hole of the bowl-shaped plug, and pulling out the bowl-shaped plug.

[0012] In some embodiments, the step of passing the pull rod head of the pull rod through the punched hole of the bowl-shaped plug and pulling out the bowl-shaped plug includes: passing the pull rod through the guide hole and making the pull rod head pass through the punched hole of the bowl-shaped plug; screwing the nut on the pull rod until the end face of the nut contacts the end face of the guide sleeve; slowly screwing the nut so that the thread on the pull rod cooperates with the nut to drive the pull rod to pull out the bowl-shaped plug.

[0013] In some embodiments, the step of passing the pull rod head of the pull rod through the punched hole of the bowl-shaped plug and pulling out the bowl-shaped plug further includes: rotating the pull rod to stagger the pull rod head from the punched hole of the bowl-shaped plug; using the pull rod head to abut against the bottom of the bowl-shaped plug and pulling out the bowl-shaped plug.

[0014] In some embodiments, the step of applying an impact force to the punch to drive the punch head to punch the bowl-shaped plug includes: using the second inclined surface of the punch head to punch the bowl-shaped plug until being resisted by the first inclined surface of the punch head and then stopping punching.

[0015] The beneficial effects brought by the technical solution provided by the present invention include:

[0016] The embodiments of the present invention provide a tool and method for removing a stepped deep-hole bowl-shaped plug of an engine. By using the guide sleeve to guide the punch, after punching the bowl-shaped plug with the punch, then using the pull rod to pass through the hole to pull out the bowl-shaped plug. Since the size of the tool can be determined by the size of the bowl-shaped plug, it can be applicable to bowl-shaped plugs with different diameters. Because the impact force and pulling force applied to the bowl-shaped plug are along the axial direction, the tool is generally not easy to break. By passing the pull rod through the punched hole and abutting against the bottom of the bowl-shaped plug to pull out the bowl-shaped plug, the pulling force on the bowl-shaped plug is relatively reliable, with a high success rate, simple operation, time-saving and labor-saving, and high efficiency. Brief Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 Schematic structural diagram of the use of the punch in the method for removing the stepped deep-hole bowl-shaped plug of the engine provided by the embodiment of the present invention;

[0019] Figure 2 Schematic structural diagram of the use of the pull rod in the method for removing the stepped deep-hole bowl-shaped plug of the engine provided by the embodiment of the present invention;

[0020] Figure 3 Schematic structural diagram of the bowl-shaped plug provided by the embodiment of the present invention;

[0021] Figure 4 Schematic cross-sectional structural diagram of the guide sleeve of the tool for removing the stepped deep-hole bowl-shaped plug of the engine provided by the embodiment of the present invention;

[0022] Figure 5 Schematic top view structural diagram of the guide sleeve of the tool for removing the stepped deep-hole bowl-shaped plug of the engine provided by the embodiment of the present invention;

[0023] Figure 6 Schematic front view structural diagram of the punch of the tool for removing the stepped deep-hole bowl-shaped plug of the engine provided by the embodiment of the present invention;

[0024] Figure 7 Schematic top view structural diagram of the punch of the tool for removing the stepped deep-hole bowl-shaped plug of the engine provided by the embodiment of the present invention;

[0025] Figure 8 Schematic front view structural diagram of the pull rod of the tool for removing the stepped deep-hole bowl-shaped plug of the engine provided by the embodiment of the present invention;

[0026] Figure 9 Schematic left view structural diagram of the pull rod of the tool for removing the stepped deep-hole bowl-shaped plug of the engine provided by the embodiment of the present invention.

[0027] Reference numerals in the drawings:

[0028] 1. Opening; 2. Bowl-shaped plug; 3. Guide sleeve; 31. Installation part; 32. Through hole; 33. Guide hole; 34. Stopping part; 4. Punch; 41. Punch guide rod; 42. First inclined surface; 43. Second inclined surface; 44. Punch head; 5. Pull rod; 51. Thread; 52. Pull rod guide rod; 53. Pull rod head. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] The embodiments of the present invention provide an engine stepped deep-hole bowl-shaped plug removal tool and method, which can solve the problems in the related art that it is not applicable to small-diameter bowl-shaped plugs, the clamping force on the bowl-shaped plugs is unreliable, and the success rate is low.

[0031] See Figure 1 and Figure 2 As shown in

[0032] and

[0033] In use, the guide sleeve 3 is installed in the opening 1, the punch 4 is inserted through the guide hole 33 of the guide sleeve 3, and the punch head 44 at the end is aligned with the bowl-shaped plug 2. Then, an impact force is applied to the punch 4 using other tools, and at the same time, the guide sleeve 3 functions to guide the punch 4. After the punch 4 punches a hole in the bowl-shaped plug 2, the pull rod 5 is used to pass through the hole, and the pull rod 5 is used to pull out the bowl-shaped plug 2.

[0034] See Figure 2 , Figure 8 and Figure 9 As shown in, in one embodiment, the pull rod 5 may include a pull rod guide rod 52 that matches the guide hole 33. One end of the pull rod guide rod 52 is provided with a thread 51, and the thread 51 is used to cooperate with a nut to drive the pull rod 5 to pull out the bowl-shaped plug 2. In this embodiment, the pull rod guide rod 52 is cylindrical and has a length greater than the depth of the engine. A thread 51 is provided at one end of the pull rod guide rod 52 away from the pull rod head 53. In use, the pull rod guide rod 52 is inserted through the guide hole 33 on the guide sleeve 3, and the pull rod head 53 is passed through the punched hole on the bowl-shaped plug 2, so that the end of the pull rod guide rod 52 with the thread 51 is outside the engine. A nut is sleeved outside the thread 51 of the pull rod guide rod 52, and the nut is rotated downward until the nut descends to contact the top of the guide sleeve 3. The nut is continuously rotated, and the driving force of the cooperation between the thread 51 and the nut drives the pull rod 5 to move upward. The pull rod head 53 drives the bowl-shaped plug 2 to move upward, and finally the bowl-shaped plug 2 is disengaged. By using the cooperation of the thread 51 and the nut, a pulling force is applied to the pull rod 5 by the thread to pull out the bowl-shaped plug 2. The pulling force is continuous, stable and reliable, which can reduce variables and improve the success rate.

[0035] In another embodiment, a puller can also be used to apply a pulling force to the pull rod 5 to pull out the bowl-shaped plug 2, and the process is simple, faster and more direct.

[0036] See Figure 5 , Figure 8 and Figure 9As shown, in some embodiments, the length of the pull rod head 53 is greater than the diameter of the pull rod guide rod 52, and the width of the pull rod head 53 is less than the diameter of the pull rod guide rod 52; a through hole 32 matching the pull rod head 53 is provided on the guide sleeve 3, and the through hole 32 communicates with the guide hole 33. In this embodiment, the pull rod guide rod 52 is cylindrical, the pull rod head 53 is strip-shaped, the length of the pull rod head 53 is greater than the diameter of the pull rod guide rod 52, the width of the pull rod head 53 is less than the diameter of the pull rod guide rod 52, the pull rod guide rod 52 is used to pass through the guide hole 33, the guide hole 33 is circular, and the inner wall of the guide hole 33 can guide the pull rod guide rod 52 to keep it vertical and prevent skew. The through hole 32 is rectangular, the through hole 32 communicates with the guide hole 33, the through hole 32 extends from the guide hole 33 to both sides, and the width of the through hole 32 is less than the width of the guide hole 33; the guide hole 33 can cooperate with the cylindrical surface of the pull rod guide rod 52 to guide the pull rod guide rod 52 to keep its vertical movement. The diameter of the guide hole 33 is greater than the width of the through hole 32, which neither hinders the passing of the pull rod head 53 nor affects the guiding effect of the guide hole 33 on the pull rod guide rod 52.

[0037] See Figure 8 and Figure 9 As shown, in some embodiments, the pull rod head 53 is connected to the pull rod guide rod 52 through a connecting rod, and both ends of the pull rod head 53 extend obliquely towards the direction close to the thread 51. In this embodiment, the pull rod head 53 is strip-shaped, the pull rod head 53 is divided into three parts, the middle part is horizontally arranged, and both ends are inclined obliquely upwards, so that the heights of both ends are higher than the height of the middle part. That is to say, after passing the pull rod head 53 through the hole on the bowl-shaped plug 2, when the pull rod 5 is lifted upwards out of the bowl-shaped plug 2, both ends of the pull rod head 53 will first contact the edge of the bowl-shaped plug 2, making the edge of the bowl-shaped plug 2 bear force first. Since a hole is punched in the middle of the bowl-shaped plug 2, the closer to the hole, the easier the bowl-shaped plug 2 is to deform, and the position far from the hole, that is, the edge of the bowl-shaped plug 2, has higher strength and is not easy to deform. Therefore, through the inclined design at both ends of the pull rod head 53, the pull rod head 53 preferentially contacts the edge position of the bowl-shaped plug 2, which can reduce the risk of the pull rod 5 being pulled off and improve the success rate of pulling out the bowl-shaped plug 2.

[0038] See Figure 6 and Figure 7As shown, in some embodiments, the punch head 44 has a first inclined surface 42 and a second inclined surface 43. The first inclined surface 42 extends obliquely from the punch guide rod 41 towards its axis. The second inclined surface 43 extends obliquely from the first inclined surface 42 towards its axis, and the slope of the second inclined surface 43 is smaller than that of the first inclined surface 42. In this embodiment, the first inclined surface 42 serves as a transition part between the second inclined surface 43 and the punch guide rod 41. The first inclined surface 42 and the second inclined surface 43 form a shape similar to a rhombus. The slope of the first inclined surface 42 is larger, and the slope of the second inclined surface 43 is smaller. That is to say, the width is the widest at the connection between the first inclined surface 42 and the second inclined surface 43, and the thickness is greater than that of the second inclined surface 43. The two sets of symmetrical inclined surfaces determine the maximum length of the hole, and can provide a certain resistance when the punch 4 punches the hole, preventing over-punching and causing the hole to be too large. The slope of the second inclined surface 43 is smaller, while ensuring the width of the hole, making the hole width slightly larger than the thickness of the second inclined surface 43, which is convenient for the tool to be pulled out.

[0039] See Figure 4 As shown, in some embodiments, the guide sleeve 3 has a mounting portion 31 for passing through the opening 1. One end of the mounting portion 31 is provided with a stopping portion 34 for stopping outside the opening 1. The size of the stopping portion 34 is larger than that of the mounting portion 31. In this embodiment, both the mounting portion 31 and the stopping portion 34 are cylindrical. The size of the stopping portion 34 is larger than that of the mounting portion 31. When installing the guide sleeve 3 into the opening 1, the mounting portion 31 can be directly inserted into the opening 1, and the stopping portion 34 can position the guide sleeve 3 in the opening 1.

[0040] See Figure 1 and Figure 2As shown in the figure, a method for removing stepped deep-hole bowl-shaped plugs of an engine provided by an embodiment of the present invention may include the following steps: Install a guide sleeve 3 in an opening 1 of the engine; Pass a punch 4 through a guide hole 33 of the guide sleeve 3, and apply an impact force to the punch 4 to drive the punch head 44 to punch the bowl-shaped plug 2; Pass the pull rod head 53 of the pull rod 5 through the punched hole of the bowl-shaped plug 2 and pull out the bowl-shaped plug 2. In this embodiment, the bowl-shaped plug 2 is located inside the engine, and an opening 1 is provided above the bowl-shaped plug 2 on the engine. The guide sleeve 3 can be installed in the opening 1. The guide sleeve 3 is provided with a guide hole 33 for guiding the punch 4 and the pull rod 5. The punch 4 has a punch guide rod 41, which can enter through the guide hole 33. The end of the punch guide rod 41 is provided with a punch head 44, and the punch head 44 is in a sharp cone shape for punching the bowl-shaped plug 2. The end of the pull rod 5 is provided with a pull rod head 53, and the pull rod head 53 can pass through the hole punched in the bowl-shaped plug 2 and abut against the bottom of the bowl-shaped plug 2 to pull out the bowl-shaped plug 2. By using the guide sleeve 3 to guide the punch 4, after the punch 4 punches the bowl-shaped plug 2, then use the pull rod 5 to pass through the hole to pull out the bowl-shaped plug 2. Since the size of the punched hole is small, it is applicable to small-diameter bowl-shaped plugs. Since the impact force and pulling force applied to the bowl-shaped plug 2 are along the axial direction, the tool is generally not easy to break. By passing the pull rod 5 through the punched hole and abutting against the bottom of the bowl-shaped plug 2 to pull out the bowl-shaped plug, the pulling force on the bowl-shaped plug 2 is relatively reliable, with a high success rate, simple operation, time-saving and labor-saving, and high efficiency.

[0041] See Figure 2 As shown in the figure, in some embodiments, the step of passing the pull rod head 53 of the pull rod 5 through the punched hole of the bowl-shaped plug 2 and pulling out the bowl-shaped plug 2 includes: Pass the pull rod 5 through the guide hole 33 and make the pull rod head 53 pass through the punched hole of the bowl-shaped plug 2; Screw the nut on the pull rod 5 until the end face of the nut contacts the end face of the guide sleeve 3; Slowly screw the nut so that the thread 51 on the pull rod 5 cooperates with the nut to drive the pull rod 5 to pull out the bowl-shaped plug 2. In this embodiment, the pull rod guide rod 52 is cylindrical and has a length greater than the depth of the engine. One end of the pull rod guide rod 52 away from the pull rod head 53 is provided with a thread 51. When in use, pass the pull rod guide rod 52 through the guide hole 33 on the guide sleeve 3 and pass the pull rod head 53 through the punched hole of the bowl-shaped plug 2, so that the end of the pull rod guide rod 52 with the thread 51 is outside the engine. Put a nut on the thread 51 of the pull rod guide rod 52 and rotate the nut downward until the nut drops to contact the top of the guide sleeve 3. Continue to rotate the nut, and the driving force of the cooperation between the thread 51 and the nut drives the pull rod 5 to move upward, and the pull rod head 53 drives the bowl-shaped plug 2 to move upward, and finally the bowl-shaped plug 2 is disengaged. By using the cooperation of the thread 51 and the nut, applying a pulling force to the pull rod 5 by the thread to pull out the bowl-shaped plug 2, the pulling force is continuous, stable and reliable, which can reduce variables and improve the success rate.

[0042] See also Figure 2 As shown, in some embodiments, the pulling rod head 53 of the pulling rod 5 is passed through the punching hole of the bowl-shaped plug 2 and the bowl-shaped plug 2 is pulled out, which may also include: rotating the pulling rod 5 so that the pulling rod head 53 is staggered with the punching hole of the bowl-shaped plug 2; using the pulling rod head 53 to abut against the bottom of the bowl-shaped plug 2 and pull out the bowl-shaped plug 2. In this embodiment, the pulling rod head 53 is in the shape of an elongated strip, and the pulling rod head 53 is divided into three parts. The middle part is horizontally arranged, and the two ends are inclined upward, so that the height of the two ends is higher than the height of the middle part. That is to say, when the pulling rod head 53 is passed through the bowl-shaped plug 2, the pulling rod head 53 is pressed against the bottom of the bowl-shaped plug 2. After the hole is punched, when the pull rod 5 is pulled upward to pull out the bowl-shaped plug 2, the two ends of the pull rod head 53 will first contact the edge of the bowl-shaped plug 2, so that the edge of the bowl-shaped plug 2 is subjected to force first. After the punching of the bowl-shaped plug 2 is completed, due to the action of the impact force, the bowl-shaped plug 2 will deform downward from the center to the edge, forming a funnel shape. The center of the bowl-shaped plug 2 is the most deformed and the lowest strength. The closer to the edge, the higher the strength. Therefore, by designing the two ends of the pull rod head 53 to be inclined, the pull rod head 53 is made to contact the edge of the bowl-shaped plug 2 first, which can reduce the risk of the pull rod 5 being pulled off and improve the success rate of pulling out the bowl-shaped plug 2.

[0043] See also Figure 1 As shown, in some embodiments, applying impact force to the punch 4 to drive the punch head 44 to punch the bowl-shaped plug 2 may include: using the second inclined surface 43 of the punch head 44 to punch the bowl-shaped plug 2 until the punching is stopped after encountering the resistance of the first inclined surface 42 of the punch head 44. In this embodiment, the first inclined surface 42 serves as a transition portion between the second inclined surface 43 and the punch guide rod 41. The first inclined surface 42 and the second inclined surface 43 form a shape similar to a diamond, and the slope of the first inclined surface 42 is larger, and the slope of the second inclined surface 43 is smaller. That is, the width is widest at the connection between the first inclined surface 42 and the second inclined surface 43, and the thickness is greater than the thickness of the second inclined surface 43, which is used to provide a certain resistance when the punch 4 punches a hole to prevent it from being punched through and causing the hole to be too large. The slope of the second inclined surface 43 is smaller. While ensuring the width of the hole, the hole width is made slightly larger than the thickness of the second inclined surface 43, which facilitates the removal of the tool.

[0044] Instructions for use: First, install the punch 4 and the guide sleeve 3 in place, use a hammer or other tool to apply impact force to the punch 4 until a rectangular hole of a suitable size is punched out of the bowl-shaped plug 2, then remove the punch 4, insert the pull rod from the rectangular hole of the bowl-shaped plug 2, and then rotate it 90°. At this time, manually and quickly screw the nut on the pull rod so that the end face of the nut contacts the end face of the guide sleeve 3, and finally use a wrench to slowly and continuously screw the nut. Under the action of the thread, the bowl-shaped plug 2 will be slowly pulled out.

[0045] The principle of a tool for removing bowl-shaped plugs from stepped deep holes of an engine provided by an embodiment of the present invention is as follows:

[0046] The design of the punch 4 enables it to meet the usage requirements and can efficiently and stably punch out rectangular holes. The through-hole design of the guide bushing 3 not only ensures the guiding function and prevents skew, but also facilitates the passing of the punch 4 and the pull rod 5. The closer the cup plug 2 is to the edge, the higher its strength. The inclined design of the head of the pull rod 53 enables the two ends of the head to come into contact with the edge of the cup plug 2 first, avoiding being pulled off due to the deformation of the cup plug 2 and greatly improving the extraction success rate. By applying tension through the cooperation of the thread 51 and the nut, it is continuous, stable and reliable. Compared with the unstable impact force of the pin puller, it can reduce variables and improve the success rate. The operation is simple, time-saving and labor-saving, and the efficiency is high.

[0047] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. Unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] It should be noted that in the present invention, 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 order between these entities or operations. Moreover, the terms "comprising", "including" 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 also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0049] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An engine stepped deep-hole bowl-shaped plug removal tool, characterized in that It includes: A guide sleeve (3) for being installed in an opening (1) of an engine. A guide hole (33) is provided on the guide sleeve (3); A punch (4) including a punch guide rod (41) matching the guide hole (33), and a punch head (44) provided at one end of the punch guide rod (41). The punch head (44) is used for punching a bowl-shaped plug (2); And a pull rod (5) having a pull rod head (53) for passing through the punched hole of the bowl-shaped plug (2) and pulling out the bowl-shaped plug (2); The pull rod (5) includes a pull rod guide rod (52) matching the guide hole (33). A thread (51) is provided at one end of the pull rod guide rod (52). The thread (51) is used for cooperating with a nut to drive the pull rod (5) to pull out the bowl-shaped plug (2); The pull rod head (53) is connected to the pull rod guide rod (52) through a connecting rod. Both ends of the pull rod head (53) extend obliquely towards the direction close to the thread (51); A through hole (32) matching the pull rod head (53) is provided on the guide sleeve (3). The through hole (32) communicates with the guide hole (33); The punch head (44) has a first inclined surface (42) and a second inclined surface (43). The first inclined surface (42) extends obliquely from the punch guide rod (41) towards the direction close to its axis. The second inclined surface (43) extends obliquely from the first inclined surface (42) towards the direction close to its axis, and the slope of the second inclined surface (43) is smaller than the slope of the first inclined surface (42).

2. The engine stepped deep hole bowl-shaped plug removing tool according to claim 1, characterized in that: The length of the pull rod head (53) is greater than the diameter of the pull rod guide rod (52), and the width of the pull rod head (53) is smaller than the diameter of the pull rod guide rod (52).

3. The engine stepped deep hole bowl-shaped plug removing tool according to claim 1, characterized in that: The guide sleeve (3) has an installation part (31) for being inserted into the opening (1). A stop part (34) for stopping outside the opening (1) is provided at one end of the installation part (31). The size of the stop part (34) is greater than the size of the installation part (31).

4. A method for removing stepped deep-hole bowl-shaped plugs of an engine, which uses the stepped deep-hole bowl-shaped plug removing tool of the engine according to any one of claims 1-3, characterized in that, It includes the following steps: Install the guide sleeve (3) in the opening (1) of the engine; Insert the punch (4) into the guide hole (33) of the guide sleeve (3), and apply an impact force to the punch (4) to drive the punch head (44) to punch the bowl-shaped plug (2); Pass the pull rod head (53) of the pull rod (5) through the punched hole of the bowl-shaped plug (2) and pull out the bowl-shaped plug (2).

5. The method for removing the stepped deep-hole bowl-shaped plug of the engine according to claim 4, characterized in that, The step of passing the pull rod head (53) of the pull rod (5) through the punched hole of the bowl-shaped plug (2) and pulling out the bowl-shaped plug (2) includes: Insert the pull rod (5) into the guide hole (33) and make the pull rod head (53) pass through the punched hole of the bowl-shaped plug (2); Screw the nut on the pull rod (5) until the end face of the nut contacts the end face of the guide sleeve (3); Slowly turn the nut to engage the thread (51) on the pull rod (5) with the nut to drive the pull rod (5) to pull out the bowl-shaped plug (2).

6. The method for removing the stepped deep-hole bowl-shaped plug of the engine according to claim 4, characterized in that, The step of passing the head (53) of the pull rod (5) through the punching hole of the bowl-shaped plug (2) and pulling out the bowl-shaped plug (2) further includes: Rotate the pull rod (5) to stagger the head (53) of the pull rod from the punching hole of the bowl-shaped plug (2); Use the head (53) of the pull rod to abut against the bottom of the bowl-shaped plug (2) and pull out the bowl-shaped plug (2).

7. The method for removing the stepped deep-hole bowl-shaped plug of the engine according to claim 4, characterized in that, The step of applying an impact force to the punch (4) to drive the head (44) of the punch to punch the bowl-shaped plug (2) includes: Use the second inclined surface (43) of the head (44) of the punch to punch the bowl-shaped plug (2) until the punching stops after encountering the resistance of the first inclined surface (42) of the head (44) of the punch.

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