A stable air cylinder head guide tool

Abstract

This invention discloses a stable cylinder head duct pressing fixture, relating to the field of engine component assembly and manufacturing technology. The fixture includes a base with a guide cylinder inserted thereon; and a duct pressing assembly inserted into the guide cylinder for pressing the duct into the cylinder head. This stable cylinder head duct pressing fixture utilizes a support structure with a locating pin as the duct pressing structure. During duct pressing, the locating pin is inserted into the process positioning hole on the top of the cylinder head, ensuring that the duct pressing structure accurately aligns with the duct hole on the top of the cylinder head. This prevents duct installation deviations and effectively solves the technical problems of poor stability and easy damage to the cylinder head caused by existing cylinder head duct installation devices. This achieves precise duct installation, improves installation accuracy, and ensures the safety of duct installation.

Description

Technical Field

[0001] This invention relates to the field of engine component assembly and manufacturing technology, and in particular to a stable cylinder head duct tooling. Background Technology

[0002] In the engine manufacturing process, valve guides, as core functional components of the cylinder head, need to achieve precise guidance and stable support of the valve stems. Their coaxiality, perpendicularity, and assembly tightness after press-fitting directly determine the engine valve sealing performance, combustion efficiency, exhaust purification effect, and overall engine service life. Currently, the mainstream valve guide press-fitting process in the industry mainly relies on the following technical solutions, but they all have significant defects in practical applications. However, during the implementation of the above technical solution, at least the following technical problems were discovered: Currently, the existing patent application number "CN201911087947.X" discloses a manual press-fit fixture for engine cylinder head guide tubes, including a cylindrical fixture body (5), one end of which is provided with a fixture head (1), and the other end is provided with a guide rod (4); the fixture head (1) and the guide rod (4) are both coaxially arranged with the fixture body (5), and the diameter of the fixture head (1) is larger than that of the fixture body (5), and the outer cylindrical surface of the guide rod (4) forms a sliding fit with the engine cylinder head guide tube; the diameter of the fixture body (5) is larger than the outer diameter of the guide rod (4); the manual press-fit fixture is also provided with a handle sleeve (3), which is fitted onto the fixture body (5) and forms a sliding fit. Although the above technical solution can ensure the press-fit depth of the guide tube, the connection stability between the guide tube and the cylinder head is insufficient, and it is easy to tilt and shift, so that the guide tube often deforms or breaks during installation. Poor stability and prone to cylinder head damage: Existing cylinder head guide installation devices mostly use a hydraulic press to press the guide into a pre-drilled hole in the top of the cylinder head. To ensure the pressing depth, a rod-like structure is used to push the guide. However, in actual use, since the hydraulic press, rod-like structure, and cylinder head are all separate, it is necessary to control the cylinder head to move to a designated position. Specifically, the guide hole on the top of the cylinder head must align vertically with the rod-like structure at the bottom of the hydraulic press, with no deviation whatsoever. If a deviation occurs, the guide cannot slide stably into the guide hole (the guide and guide hole are misaligned), leading to… The guide tube collides and deforms with the cylinder head; secondly, if deviation occurs during the extrusion process, the guide tube may break; in addition to the above, the existing guide tube press-fitting structure only has the function of press-fitting, and when disassembling the guide tube, it is only completed by extruding the guide tube from the guide tube hole. However, when the guide tube is disassembled by extrusion, since the guide tube falls from the other end of the cylinder head, it is not only inconvenient to retrieve, but also easy to ensure that there are no other debris on the other end of the cylinder head. That is, the cylinder head needs to be completely removed before the guide tube on it can be disassembled. To this end, we propose a stable cylinder head guide tube press-fitting tool. Summary of the Invention

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a stable cylinder head guide tooling, solving the technical problem that existing cylinder head guide installation devices have poor stability and are prone to causing cylinder head damage during use.

[0004] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A stable cylinder head duct tooling, the duct tooling comprising: A base on which a guide tube is inserted; The conduit press-fit assembly is inserted into the guide tube and is used to press the conduit located in the guide tube into the cylinder head; The conduit pressing assembly includes a rod-shaped outer conduit with a pressing head at the top. The inner diameter of the guide tube is the same as the inner diameter of the conduit hole on the cylinder head. When the hydraulic press squeezes the pressing head, the conduit inserted into the guide tube is pressed into the conduit hole on the cylinder head through the outer conduit.

[0005] Preferably, the bottom of the base is provided with a plurality of positioning pins, and the positioning pins on the bottom correspond to the process positioning holes on the top of the cylinder head. When the positioning pins are inserted into the process positioning holes on the top of the cylinder head, the guide cylinder on the top of the base corresponds vertically to the guide hole on the cylinder head.

[0006] Preferably, the top of the base is provided with several through holes, and the through holes correspond one-to-one with the guide holes on the cylinder head. The inner wall of the through holes is provided with a docking component, and the through hole is connected to the guide cylinder through the docking component. The docking assembly includes a guide hole formed on the inner wall of the through hole, and a pressing pin is inserted into the guide hole. The end of the pressing pin away from the through hole is connected to the inner wall of the guide hole through a spring. The spring force is directed towards the pressing pin, and the end of the pressing pin away from the spring is spherical. The bottom of the guide cylinder is connected to an annular pin, and the outer wall of the pin has an annular groove. When the pin is inserted into the through hole, the annular groove on the outer wall of the pin is inserted into the extrusion pin on the inner wall of the through hole.

[0007] Preferably, a filling groove is provided on the outer wall of the guide cylinder, and the width of the filling groove is the same as the diameter of the conduit. The conduit can be inserted into the guide cylinder through the filling groove. When the conduit is in contact with the inner wall of the guide cylinder, the center hole of the conduit corresponds vertically with the outer conduit.

[0008] Preferably, the bottom of the outer conduit is connected to a pin head, and the outer diameter of the pin head is the same as the inner diameter of the conduit, and both are smaller than the outer diameter of the outer conduit. When the outer conduit moves into the conduit inside the guide tube, the pin head is inserted into the conduit, and the bottom of the outer conduit is in contact with the edge of the conduit.

[0009] Preferably, the outer wall of the pin head is connected to several sets of linkage hooks, and the linkage hooks are connected to the central rod inserted inside the outer conduit. When the central rod moves upward, it can drive the linkage hooks to hook the conduit. The linkage hook includes a first linkage and a second linkage that are hinged to each other. The first linkage is hinged to an extension groove on the outer wall of the pin head, and the second linkage is hinged to the outer wall of the center rod. When the center rod moves upward, both the first linkage and the second linkage flip away from the pin head.

[0010] Preferably, the extension groove extends along the length of the pin head, and the distance from the top of the extension groove to the outer conduit is greater than or equal to the length of the conduit. When the extension groove extends outward at the connection between the first and second connecting rods, the first connecting rod fits against the bottom of the conduit.

[0011] Preferably, the bottom end of the central rod is connected to a rib, and the number of sides of the rib is the same as the number of extension slots, and the second connecting rod is hinged to the side of the rib.

[0012] Preferably, the pressing head is installed at the top of the central rod and connected to the mating ring at the top of the outer guide tube via a spring. The pressing head is connected to a hydraulic press and can be moved up and down by the hydraulic press.

[0013] Preferably, the pressing head has a receiving cavity on the side facing the docking ring; when the pressing head moves in the direction of the docking ring, the pressing head fits against the top of the docking ring, and the spring between the two is located in the receiving cavity; When the pressing head moves upward, the pressing head and the docking ring separate, and the spring between them is in a stretched state.

[0014] (III) Beneficial Effects 1. Because a bearing seat with a locating pin is used as the support structure for the guide pipe pressing structure, during the pressing of the guide pipe, the locating pin can be inserted into the process locating hole on the top of the cylinder head to ensure that the guide pipe pressing structure on it can accurately correspond to the guide pipe hole on the top of the cylinder head. Therefore, there is no need for positioning detection, and there will be no guide pipe installation deviation. Thus, it effectively solves the technical problem of poor stability and easy damage to the cylinder head caused by the existing cylinder head guide pipe installation device during use, thereby achieving precise installation of the guide pipe, improving the installation accuracy of the guide pipe, and avoiding the deviation of the guide pipe during installation, thereby ensuring the safety of the guide pipe installation.

[0015] 2. A pin ring is installed at the bottom of the conduit press-fit structure using an insertion method. The pin ring corresponds to and is the same size as the through hole on the support. Therefore, the conduit press-fit structure is installed by inserting it into the through hole. Since the inner diameter of the through hole is the same as the outer diameter of the pin ring, there is no need to worry about subsequent positioning issues. Secondly, multiple extrusion pins are made in a circumferential array on the inner wall of the through hole. Under the action of the spring, the extrusion pins are inserted into the annular groove on the outer wall of the pin ring, thereby restricting the conduit press-fit structure. Using this method, the conduit press-fit structure located on the support can be freely replaced, thereby reducing the difficulty of replacement.

[0016] 3. A cylindrical guide tube is used as the guiding structure for the conduit, and a rod-shaped outer sleeve is inserted into it. Therefore, after the bearing seat is connected to the cylinder head, the guide tube corresponds to the conduit hole on the top of the cylinder head. When the conduit enters the conduit hole, the conduit is sleeved on the pin head. The double limiting by the pin head and the guide tube further improves the accuracy and stability of the conduit installation. Secondly, a central rod is inserted into the inner sleeve using a sleeve connection method. The two can move relative to each other, and multiple sets of linkage hooks are hinged between the pin head and the central rod. These hooks consist of two mutually hinged connecting rods. When the central rod moves upward, it can drive the connecting rods to unfold, forming a hook shape, thereby hooking the conduit. Figure 9 As shown; conversely, when the central rod moves downward, the connecting rod retracts into the extension slot, thereby releasing the guide tube. At this point, the guide tube can be separated from the pin head, thus completing the installation or unloading of the guide tube, as shown. Figure 8 As shown, this function allows for free switching between conduit installation and removal, increasing the overall usability of the tooling. Attached Figure Description

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0018] Figure 1 This is an overall structural diagram of an embodiment of the present invention; Figure 2 This is a structural diagram showing the separation of the guide cylinder and the base in an embodiment of the present invention; Figure 3 This is a structural diagram of the guide press-fit assembly in an embodiment of the present invention; Figure 4 This is a structural diagram showing the separation of the guide pressing assembly and the guide cylinder in an embodiment of the present invention; Figure 5 This is an exploded view of the guide press-fit assembly in an embodiment of the present invention; Figure 6 This is one of the state structure diagrams of the guide press-fit assembly in an embodiment of the present invention; Figure 7 This is the second state structure diagram of the guide press assembly in an embodiment of the present invention; Figure 8 This is a schematic diagram of the catheter installation process in an embodiment of the present invention; Figure 9 This is a schematic diagram of the catheter disassembly process in an embodiment of the present invention; Figure 10 This is a structural diagram of the cylinder head and guide pipe installation in an embodiment of the present invention.

[0019] Legend: 11. Bearing seat; 12. Locating pin; 2. Connecting assembly; 21. Guide hole; 22. Extrusion pin; 23. Pin ring; 3. Guide cylinder; 41. External guide tube; 42. Connecting ring; 43. Pressing head; 44. Pin head; 45. Linking hook; 451. Connecting rod one; 452. Connecting rod two; 46. Center rod; 47. Rib rod; 5. Filler tank. Detailed Implementation

[0020] This application provides a stable cylinder head guide pipe tooling, effectively solving the technical problems of poor stability and easy damage to the cylinder head caused by existing cylinder head guide pipe installation devices. In the use of existing cylinder head guide pipe installation devices, a bearing seat with a positioning pin is used as the support structure for the guide pipe pressing structure. During the pressing of the guide pipe, the positioning pin can be inserted into the process positioning hole on the top of the cylinder head, thereby ensuring that the guide pipe pressing structure on it can accurately correspond to the guide pipe hole on the top of the cylinder head. Therefore, there is no need for positioning detection, and there will be no guide pipe installation deviation. This achieves precise installation of the guide pipe, improves the installation accuracy of the guide pipe, and avoids the deviation of the guide pipe during installation, thereby ensuring the safety of the guide pipe installation.

[0021] Example: The technical solution in this application example effectively solves the technical problem that existing cylinder head guide installation devices have poor stability and are prone to causing cylinder head damage during use. The overall idea is as follows: To address the problems existing in the prior art, this invention provides a stable cylinder head guide pipe tooling. This tooling mainly consists of three parts: a positioning structure, a guide pipe pressing structure, and a guide pipe gripping structure. Firstly, the positioning structure utilizes a base that can mate with the cylinder head, and uses the process positioning holes machined on the top of the cylinder head as the positioning structure. Therefore, no additional positioning time is required, while ensuring positioning accuracy. Furthermore, based on this method, when installing guide pipes on different cylinder heads, only the corresponding guide pipe needs to be replaced, thus adapting to different models. Secondly, the guide pipe pressing structure addresses the issue that traditional guide pipe installation methods often require workers to pre-insert the guide pipe into the guide pipe hole (partially inserting it), and then a hydraulic press presses the guide pipe into the guide pipe hole. Alternatively, the conduit can be fitted onto a rod-like structure, and then a hydraulic press can press the conduit into the conduit hole through the rod-like structure. However, regardless of the method, since the conduit, cylinder head, and hydraulic structure are three relatively independent structures without relative limiting, the conduit often shifts or tilts when the hydraulic press applies pressure, leading to deformation, wear, or even breakage of the conduit, and also affecting the cylinder head. Thirdly, there is a conduit gripping structure, based on the conduit press-fit structure. It uses the downward and upward movements of the hydraulic press as driving force to grip the conduit. To avoid interfering with the conduit installation, the conduit gripping structure is in a non-triggered state during downward pressure; it only unfolds and grips the conduit during upward movement, thus ensuring that the conduit installation and gripping do not interfere with each other. The specific structure and content are as follows: The positioning structure is primarily a base used to support the catheter press-fit assembly, such as... Figure 1 and Figure 2As shown, a support base 11 with four through holes is selected. The reason for having four through holes is to correspond to the four guide holes on the cylinder head. To ensure that the through holes can accurately correspond to the guide holes, we use the existing process positioning holes on the cylinder head as the positioning structure. Two positioning pins 12 are set at the bottom of the support base 11. The number of positioning pins 12 can be consistent with the number and position of the process positioning holes on the cylinder head, and is not limited to two. After inserting the positioning pins 12 into the process positioning holes on the top of the cylinder head, it is only necessary to check and process the through holes corresponding to the guide holes in advance to ensure that the through holes on the support base 11 can be aligned with the guide holes after it is installed on the cylinder head, so as to facilitate the subsequent installation and processing of the guides. Secondly, since the support base 11 is connected to the cylinder head, the guide pressing structure on it will form a relatively fixed structure with the cylinder head. At this time, only a hydraulic press is needed to squeeze the guide pressing structure. This ensures that the relevant structures in contact with the guides are in a relatively fixed state, and there will be no misalignment or tilting of the guides, thereby ensuring the accuracy and stability of the guide installation.

[0022] The guide pipe press-fit structure is located in the through hole above the bearing seat 11 so that after the positioning structure is installed on the cylinder head, the guide pipe press-fit structure located on it can correspond to the guide pipe hole on the cylinder head; such as Figure 2 As shown.

[0023] It mainly consists of a cylindrical guide tube 3 and a rod-shaped structure inserted into the guide tube 3. The guide tube 3 supports the guide tube, and the rod-shaped structure pushes the guide tube towards the guide hole on the top of the cylinder head, thus pushing the guide tube into the guide hole and completing the installation. During the installation process, apart from being pushed by the rod-shaped structure, other structures in contact with it will not move, ensuring the accuracy and stability of the guide tube installation. Moreover, the rod-shaped structure only needs to transmit the pressure applied by the hydraulic press to the location of the guide tube; therefore, it is not necessary to ensure that the rod-shaped structure and the hydraulic press remain relatively stationary. Figure 3 As shown, during use, only the bottom of the hydraulic press needs to contact the top of the rod-shaped structure; in order to maintain the stability of the guide tube transition between the guide cylinder 3 and the cylinder head, the inner diameter of the guide cylinder 3 is set to be consistent with the inner diameter of the guide tube hole on the cylinder head, and both are consistent with the outer diameter of the guide tube. In this way, the guide tube can directly enter the guide tube hole along the inner wall of the guide cylinder 3 without tilting or misalignment. Furthermore, to facilitate the connection between the base and the guide cylinder 3, we set multiple sets of docking components 2 on the inner wall of the through hole. These docking components 2 hold the guide cylinder 3 in place, connecting it to the base to form a single unit. Specifically, this includes a guide hole 21 on the inner wall of the through hole, with a pressing pin 22 inserted inside. The end of the pressing pin 22 away from the through hole is connected to the inner wall of the guide hole 21 via a spring. The spring force is directed towards the pressing pin 22, and the end of the pressing pin 22 away from the spring is spherical. Figure 2 As shown in the enlarged view; in contrast, we also connect a ring-shaped pin 23 to the bottom of the guide cylinder 3, and the outer wall of the pin 23 has an annular groove. Therefore, when the pin 23 is inserted into the through hole, the annular groove on the outer wall of the pin 23 corresponds to the pressing pin 22 on the inner wall of the through hole. At this time, the pressing pin 22 will pop out under the action of its rear spring and insert into the annular groove, thereby gripping the guide cylinder 3 and connecting it to form a whole. Similarly, when replacing or disassembling, it is only necessary to pull it upward. For enterprises with very high precision requirements, bolts or one-piece molding are used to ensure the stability of the device.

[0024] Furthermore, we also have a packing groove 5 on the outer wall of the guide cylinder 3, such as Figure 3 and Figure 8 As shown in (a), and in order to facilitate the entry of the conduit into the packing groove 5, the width of the packing groove 5 needs to be greater than or equal to the diameter of the conduit. In this way, the conduit can be inserted into the guide cylinder 3 through the packing groove 5. When the conduit is in contact with the inner wall of the guide cylinder 3, the central hole of the conduit corresponds vertically with the rod-shaped structure inserted into the guide cylinder 3.

[0025] The rod-shaped structure inserted into the guide cylinder 3 mainly consists of an outer guide tube 41 (not initially connected) and a central rod 46. The outer guide tube 41 is cylindrical, and the central rod 46 inserted inside is rod-shaped. A pressing head 43 is connected to the top of the central rod 46. Therefore, when the hydraulic press squeezes the pressing head 43, the pressing head squeezes towards the location of the outer guide tube 41, and the outer guide tube 41 then presses the guide tube inserted into the guide tube hole on the cylinder head. The reason why the outer guide tube 41 can press the guide tube into the cylinder head is because the bottom of the outer guide tube 41 has a pin head 44, and the outer diameter of the pin head 44 is the same as the inner diameter of the guide tube, and both are smaller than the outer diameter of the outer guide tube 41. Figure 4 As shown, when the outer conduit 41 moves into the conduit inside the guide cylinder 3, the pin head 44 is inserted into the conduit, and the edge of the conduit is in contact with the bottom of the outer conduit 41. Therefore, when the outer conduit 41 moves downward, it can not only act on the top of the conduit, but also restrict the range of motion of the conduit from the inside through the pin head 44, and cooperate with the guide cylinder 3 to perform double limiting of the conduit from the inside and outside, so as to maximize the installation accuracy of the conduit.

[0026] The reason for inserting a central rod 46 inside the outer guide tube 41 is to subsequently drive the movement of the guide tube gripping structure. The hydraulic press is directly driven by the pressing head 43 and the central rod 46, which does not affect the downward pressure of the guide tube. This is because we have set a ring-shaped docking ring 42 at the top of the outer guide tube 41. When the pressing head 43 is driven downward by the hydraulic press, the pressing head 43 first comes into contact with the docking ring 42. Figure 9 As shown in (c), as the hydraulic press moves downward, the pressure can be transmitted to the outer conduit 41 through the docking ring 42, thereby causing the outer conduit 41 to apply pressure to the conduit.

[0027] Another key feature of this application is the catheter gripping structure, which is based on a catheter press-fitting structure. First, a spring connects the pressing head 43 to the docking ring 42 at the top of the outer catheter 41, allowing relative movement between the outer catheter 41 and the central rod 46, thus providing a basis for the subsequent unfolding and retraction of the linkage hook 45. Then, several sets of extension grooves extending vertically along the length of the pin head 44 are formed on its outer wall, such as… Figure 4 and Figure 5 As shown, and in order to reserve sufficient space for the conduit, the distance from the top of the extension groove to the outer conduit 41 is greater than or equal to the length of the conduit. This ensures that when the linkage hook 45 in the extension groove unfolds, it can hook onto the bottom of the conduit, as shown. Figure 9 As shown in (b) of the diagram.

[0028] At the same time, a new problem arises: the spring between the pressing head 43 and the docking ring 42. When the pressing head 43 is pressed down, the pressure will act on the spring between the two, causing the spring to deform or be damaged. To address this, we have a receiving cavity on the side of the pressing head 43 facing the docking ring 42. Therefore, when the pressing head 43 moves towards the docking ring 42, the top of the pressing head 43 and the docking ring 42 are in contact, and the spring between them is located in the receiving cavity, thus avoiding the influence of the spring. Furthermore, when the pressing head 43 moves upward, the pressing head 43 and the docking ring 42 separate from each other, and the spring between them is in a stretched state, so as to facilitate the subsequent approach and contact between the pressing head 43 and the docking ring 42.

[0029] The linkage hooks 45 are disposed in the extension slots, and the number of the linkage hooks is the same as the number of extension slots. The two ends of the linkage hooks 45 are respectively connected to the outer wall of the pin head 44 and the central rod 46 inserted into the outer conduit 41. When the central rod 46 moves upward, it can drive the linkage hooks 45 to bend, thereby hooking the conduit, as detailed below: The linkage hook 45 includes a first linkage 451 and a second linkage 452 that are hinged to each other, such as... Figure 5 As shown in the structure below, connecting rod 451 is hinged to the extension slot on the outer wall of the pin head 44, and connecting rod 452 is hinged to the outer wall of the center rod 46, as follows. Figure 6 and Figure 7As shown in the enlarged view, when the central rod 46 moves upward, both connecting rod 451 and connecting rod 452 flip away from the pin head 44. That is, when the connection between connecting rod 451 and connecting rod 452 unfolds outward, a hook shape is formed, as shown in the enlarged view. Figure 9 As shown in (b), when the central rod 46 continues to move upward, it can drive the guide tube on the pin head 44 to move upward together, thereby pulling the guide tube out of the cylinder head; and in order to facilitate the hinge connection between the connecting rod 452 and the central rod 46, we connect a rib 47 with multiple sides to the bottom end of the central rod 46, and the number of sides of the rib 47 is the same as the extension groove, so that the connecting rod 452 can be hinged to the sides of the rib 47 through a hinge structure such as a hinge.

[0030] In practice, the process mainly consists of two parts: catheter installation and catheter removal. For conduit installation, align the locating pin 12 on the bearing seat 11 with the process locating hole on the cylinder head and insert them together. When the locating pin 12 is inserted into the process locating hole, the conduit press-fit structure on the bearing seat 11 aligns vertically with the conduit hole on the cylinder head. Figure 10 As shown, after completion, press the conduit to be installed from the packing groove 5 on the outer wall of the guide cylinder 3 into the guide cylinder 3, as shown. Figure 8 As shown in (a), the outer conduit 41 is then inserted into the guide cylinder 3. Since the conduit is already located in the guide cylinder 3, and the center of the conduit corresponds to the bottom pin 44 of the outer conduit 41, when the outer conduit 41 moves into the guide cylinder 3, the pin 44 is inserted into the conduit, and the edge of the conduit is in contact with the bottom of the outer conduit 41. Therefore, when the outer conduit 41 moves downward, it can not only act on the top of the conduit, but also restrict the range of motion of the conduit from the inside through the pin 44. This works in conjunction with the guide cylinder 3 to provide double internal and external restraint for the conduit, maximizing the accuracy of the conduit installation. Figure 8 As shown in (b); The hydraulic press applies pressure to the pressing head 43 at the top of the center rod 46, causing it to move downwards. The pressing head 43 remains in contact with the mating ring 42, thus transmitting the pressure of the hydraulic press to the guide tube, forcing the guide tube into the cylinder head. Figure 8 As shown in Figure (c) to (d), the installation of the conduit is completed. Afterwards, simply maintain the contact between the pressing head 43 and the mating ring 42, and pull the outer conduit 41 upwards. This can be achieved by pulling the support seat 11 upwards. At this time, the support seat 11 will drive the guide cylinder 3 to apply an upward thrust to the mating ring 42, thereby keeping the pressing head 43 and the mating ring 42 in contact. Figure 8 The state shown in (d) is as follows.

[0031] The catheter was removed, as follows Figure 9As shown in (a), referring to the conduit installation method, the control pin head 44 is inserted into the conduit, and the linkage hook 45 on the pin head 44 is located below the conduit; at this time, the pressing head 43 is pulled, and the pressing head 43 moves upward, while the docking ring 42 remains stationary under the action of gravity, as shown in (a). Figure 6 and Figure 7 As shown in the enlarged view, when the central rod 46 moves upward, both connecting rod 451 and connecting rod 452 flip away from the pin head 44. That is, when the connection between connecting rod 451 and connecting rod 452 unfolds outward, a hook shape is formed, as shown in the enlarged view. Figure 9 As shown in (b), when the center rod 46 continues to move upward, it can drive the guide tube on the pin head 44 to move upward as well, thereby pulling the guide tube out of the cylinder head, as shown in (b). Figure 9 As shown in (c); After the conduit is removed, lift the support seat 11 so that connecting rod 1 451 and connecting rod 2 452 can be retracted. At this time, the conduit can fall under the action of gravity, thus completing the disassembly of the conduit.

[0032] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A stable cylinder head guide pipe tooling, characterized in that, The catheter tooling includes: A base on which a guide tube (3) is inserted; The conduit press-fit assembly is inserted into the guide tube (3) and is used to press the conduit located in the guide tube (3) into the cylinder head; The conduit pressing assembly includes a rod-shaped outer conduit (41), and a pressing head (43) is provided on the top of the outer conduit (41). The inner diameter of the guide cylinder (3) is consistent with the inner diameter of the conduit hole on the cylinder head. When the hydraulic press squeezes the pressing head (43), the conduit inserted into the guide cylinder (3) is pressed into the conduit hole on the cylinder head through the outer conduit (41). The bottom of the outer conduit (41) is connected to a pin head (44), and the outer diameter of the pin head (44) is the same as the inner diameter of the conduit, and both are smaller than the outer diameter of the outer conduit (41). When the outer conduit (41) moves into the conduit inside the guide tube (3), the pin head (44) is inserted into the conduit, and the bottom of the outer conduit (41) is in contact with the edge of the conduit. The outer wall of the pin head (44) is connected to several sets of linkage hooks (45), and the linkage hooks (45) are connected to the central rod (46) inserted inside the outer conduit (41). When the central rod (46) moves upward, it can drive the linkage hooks (45) to hook the conduit. The linkage hooks (45) include a first linkage (451) and a second linkage (452) that are hinged to each other. The first linkage (451) is hinged to the extension groove opened on the outer wall of the pin head (44), and the second linkage (452) is hinged to the outer wall of the central rod (46). When the central rod (46) moves upward, the first linkage (451) and the second linkage (452) both flip away from the side away from the pin head (44). The extension groove extends along the length of the pin head (44), and the distance from the top of the extension groove to the outer conduit (41) is greater than or equal to the length of the conduit. When the extension groove extends outward at the connection between the first connecting rod (451) and the second connecting rod (452), the first connecting rod (451) fits against the bottom of the conduit.

2. The stable cylinder head guide pipe tooling as described in claim 1, characterized in that: The base is provided with a plurality of positioning pins (12) at the bottom, and the positioning pins (12) at the bottom correspond to the process positioning holes at the top of the cylinder head. When the positioning pins (12) are inserted into the process positioning holes at the top of the cylinder head, the guide tube (3) at the top of the base corresponds vertically to the guide tube holes on the cylinder head.

3. The stable cylinder head guide pipe tooling as described in claim 1, characterized in that: The top of the base is provided with several through holes, and the through holes correspond one-to-one with the guide holes on the cylinder head. The inner wall of the through holes is provided with a docking component (2), and is connected to the guide cylinder (3) through the docking component (2). The docking assembly (2) includes a guide hole (21) opened on the inner wall of the through hole, and a pressing pin (22) is inserted into the guide hole (21). The end of the pressing pin (22) away from the through hole is connected to the inner wall of the guide hole (21) through a spring. The spring force is directed towards the pressing pin (22), and the end of the pressing pin (22) away from the spring is spherical. The bottom of the guide cylinder (3) is connected to an annular pin (23), and the outer wall of the pin (23) is provided with an annular groove. When the pin (23) is inserted into the through hole, the annular groove on the outer wall of the pin (23) is inserted into the extrusion pin (22) on the inner wall of the through hole.

4. A stable cylinder head guide pipe tooling as described in claim 1, characterized in that: The outer wall of the guide cylinder (3) is provided with a filling groove (5), and the width of the filling groove (5) is consistent with the diameter of the conduit. The conduit can be inserted into the guide cylinder (3) through the filling groove (5). When the conduit is in contact with the inner wall of the guide cylinder (3), the center hole of the conduit corresponds vertically with the outer conduit (41).

5. A stable cylinder head guide pipe tooling as described in claim 1, characterized in that: The bottom end of the central rod (46) is connected to the rib rod (47), and the number of sides of the rib rod (47) is the same as the number of extension slots. The connecting rod two (452) is hinged to the side of the rib rod (47).

6. A stable cylinder head guide pipe tooling as described in claim 1, characterized in that: The pressing head (43) is installed at the top of the center rod (46) and connected to the docking ring (42) at the top of the outer guide tube (41) by a spring. The pressing head (43) is connected to the hydraulic press and can be driven to move up and down by the hydraulic press.

7. A stable cylinder head guide pipe tooling as described in claim 6, characterized in that: The pressing head (43) has a storage cavity on the side facing the docking ring (42); when the pressing head (43) moves in the direction of the docking ring (42), the pressing head (43) fits against the top of the docking ring (42), and the spring between the two is located in the storage cavity; When the pressing head (43) moves upward, the pressing head (43) and the docking ring (42) separate from each other, and the spring between them is in a stretched state.

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