Valve guide removal device

Abstract

The present application provides a valve guide disassembly device, which belongs to the field of engine technology. The valve guide disassembly device uses a threaded screw hole to tighten the ejector downward to impact the valve guide, thereby disassembling the valve guide. The implementation conditions are relatively simple, and the force application process is controllable. In addition, the angle of the ejector is adjustable, which is suitable for disassembling valve guides on cylinder heads of different models, and the device is highly practical. In addition, the overall structure of the device is relatively simple, the volume is relatively small, and it is easy to carry.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to a valve guide removal device. Background Art

[0002] The valve guide is a guide device for the vehicle engine valve, which is used to ensure the valve to make reciprocating linear motion. The valve guide is usually interference fit with the cylinder head, so it is difficult to remove the valve guide from the cylinder head. Generally, there are three ways to remove the valve guide: manual hammering, special hydraulic press ejection, and pneumatic punch ejection.

[0003] However, manually using a hammer and a punch to hit the valve guide can easily lead to problems such as inaccurate punch positioning and force deviation from the axis. For a specific hydraulic press ejection method, due to the angle between the valve guide and the cylinder axis, a workbench with a special structure is required to achieve consistency between the hydraulic feed direction and the valve guide axis. Therefore, the specific hydraulic press ejection method requires the hydraulic press to be used in conjunction with a special workbench to remove the guide, which results in a larger overall size of the device. In addition, if there is a slight deviation in positioning, the hydraulic press cannot stop suddenly, so the probability of damaging the valve guide and cylinder head by using a specific hydraulic press ejection method is high. The pneumatic punch gun method requires related components such as an air pump and an air pipeline, and sufficient air pressure is always required, so it does not have the characteristics of portability. In addition, the pneumatic punch gun will generate a lot of noise during inflation, operation and pressure relief. Summary of the invention

[0004] In view of this, the present application provides a valve guide removal device, which has a relatively simple structure, a small size, and strong practicality. Specifically, the embodiments of the present application include the following technical solutions:

[0005] The embodiment of the present application provides a valve guide disassembly device, the valve guide disassembly device comprising a clamping mechanism, an ejection mechanism and a fixing mechanism;

[0006] The clamping mechanism is suitable for clamping the cylinder head;

[0007] The fixing mechanism is fixedly connected to the clamping mechanism;

[0008] The ejection mechanism comprises an ejection member, a force applying member and a guide member;

[0009] The guide member is sleeved on the ejector member, the ejector member is threadedly connected to the guide member, and the force applying member is used to make the ejector member spirally move forward relative to the guide member when rotating;

[0010] The guide member is connected to the fixing mechanism via a pin shaft, and the installation angle of the guide member relative to the fixing mechanism is adjustable so that the advancing angle of the ejector member can be adjusted.

[0011] Optionally, the ejector includes a force transmission rod and a punch;

[0012] The first end of the force transmission rod is connected to the force applying member, and the second end of the force transmission rod is connected to the punch;

[0013] The end face of the second end of the force transmission rod is a protrusion with a first arc surface; the end of the punch connected to the force transmission rod has a recess, and the recess has an inwardly concave second arc surface; when the protrusion fits into the recess, the first arc surface contacts the second arc surface.

[0014] Optionally, the clamping mechanism comprises an upper clamping body, a lower clamping body and a clamping locking assembly;

[0015] A clamping space is formed between the upper clamping body and the lower clamping body, and the clamping space is used to accommodate the cylinder head so as to clamp the cylinder head between the upper clamping body and the lower clamping body;

[0016] One end of the clamping and locking assembly is connected to the upper clamping body, and the other end is connected to the lower clamping body, so that the distance between the upper clamping body and the lower clamping body can be adjusted and the cylinder head is clamped between the upper clamping body and the lower clamping body.

[0017] Optionally, the upper clamping body has a first connecting portion and a first clamping portion,

[0018] The lower clamping body has a second connecting portion and a second clamping portion,

[0019] The first clamping portion and the second clamping portion are used to clamp the cylinder cover.

[0020] The first connection portion is connected to the second connection portion.

[0021] Optionally, the clamping and locking assembly includes a bolt and a nut;

[0022] The first clamping portion comprises a bending portion and an end plate portion, wherein the bending portion extends in a direction away from the main body of the first clamping portion and close to the second clamping portion, and the end plate portion is connected to the bending portion and parallel to the second clamping portion;

[0023] The lower clamping body and the end plate portion are both provided with threaded holes matched with the bolts.

[0024] Optionally, one end of the first connection portion perpendicular to the up-down direction has a sleeve structure, and the second connection portion is embedded in the sleeve structure.

[0025] Optionally, the clamping and locking assembly includes a first locking assembly and a second locking assembly;

[0026] The first locking assembly and the second locking assembly are respectively located at two ends of the clamping mechanism perpendicular to the up and down directions.

[0027] Optionally, a buffer pad is provided on one side of the first clamping portion and the other side of the second clamping portion that are opposite to each other.

[0028] Optionally, the guide member has a connecting ear;

[0029] The fixing mechanism comprises a base, a fixing member and a tightening assembly;

[0030] The fixing piece is connected to the connecting ear via a pin;

[0031] The base is fixed on the upper clamping body;

[0032] The tightening assembly is located below the connecting ear and is used to prevent the connecting ear from rotating downward around the pin axis.

[0033] Optionally, the tightening assembly includes an abutment member and a locking assembly;

[0034] One end of the abutment is rotatably connected to the base via a pin, and the other end is in contact with the connection ear;

[0035] The locking assembly is located below the abutment and abuts against the abutment to prevent the abutment from rotating downward around the pin.

[0036] Optionally, the abutment piece has an abutment portion on one side close to the locking assembly, the abutment portion has an arcuate surface protruding outward, and the locking assembly abuts against the arcuate surface.

[0037] Optionally, the fixing mechanism further comprises a pressing assembly;

[0038] One end of the clamping assembly is fixed to the base, and the other end is abutted against the connecting ear. The clamping assembly is located on a side of the ejection mechanism close to the force applying member and is used to clamp the connecting ear.

[0039] Optionally, the pressing assembly includes a pressing member and a column;

[0040] The bottom of the column is fixed to the base;

[0041] One end of the pressing member is movably connected to the column, and the other end is pressed against the connecting ear.

[0042] Optionally, the upper clamping body has two mounting grooves distributed along its width direction;

[0043] The two mounting grooves are not connected to each other and are used to accommodate the base in an alternative manner. The ejector extends downward from the outer side of the mounting groove where the base is mounted.

[0044] The valve guide disassembly device provided in the embodiment of the present application adopts a method of tightening the threaded screw hole to make the ejector impact the valve guide downward, thereby disassembling the valve guide. The implementation conditions are relatively simple, and the force application process is controllable. In addition, the angle of the ejector is adjustable, so it is suitable for disassembling valve guides on cylinder heads of different models, and the device is highly practical. In addition, the overall structure of the device is relatively simple, the volume is relatively small, and it is easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0046] Figure 1 A schematic diagram of the structure of a valve guide removal device provided in an embodiment of the present application;

[0047] Figure 2 A front view of a valve guide removal device provided in an embodiment of the present application from one perspective;

[0048] Figure 3 A schematic cross-sectional view of the ejection mechanism of the valve guide removal device provided in an embodiment of the present application ejecting the valve guide on the cylinder head;

[0049] Figure 4 A front view of the valve guide removal device provided by an embodiment of the present application from another perspective;

[0050] Figure 5 for Figure 1 A partial enlarged view of the valve guide removal device;

[0051] Figure 6 A schematic diagram of a valve guide removal device provided in an embodiment of the present application clamping a cylinder head and ejecting a valve guide.

[0052] The reference numerals in the figures represent respectively:

[0053] 1- Clamping mechanism;

[0054] 11-upper clamping body; 12-lower clamping body; 13-clamping and locking assembly;

[0055] 111 - first connecting portion; 112 - first clamping portion; 113 - mounting groove;

[0056] 1121-bending portion; 1122-end plate portion;

[0057] 121 - second connecting portion; 122 - second clamping portion;

[0058] 131-first locking assembly; 132-second locking assembly;

[0059] 1311-bolt; 1312-nut;

[0060] 14- cushion;

[0061] 2- ejection mechanism;

[0062] 21- ejector; 22- force applying member; 23- guide member;

[0063] 231-connecting ear;

[0064] 211-force transmission rod; 212-punch;

[0065] 2111-protrusion; 2121-recess; 2122-ejection portion; 2123-guide portion;

[0066] 3-Fixed mechanism;

[0067] 31-base; 32-fixing member; 33-tightening assembly; 34-pressing assembly;

[0068] 341-pressing member; 342-post;

[0069] 331-abutment member; 332-locking assembly;

[0070] 3311-abutment portion; 3321-bracket body; 3322-screw-in screw;

[0071] 4-cylinder head;

[0072] 5- Valve guide.

[0073] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0074] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0075] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0076] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by those of ordinary skill in the art.

[0077] In order to make the technical solutions and advantages of the present application more clear, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0078] The existing technology generally uses three methods to remove the valve guide on the cylinder head: manual hammering, specific hydraulic press ejection, and pneumatic punch ejection. However, the specific hydraulic press ejection method requires a special workbench and cannot be adjusted in an emergency when the positioning is deviated. It also requires professional workers to operate; the manual hammering method is prone to problems such as inaccurate punch positioning and force deviation from the axis, which may cause the punch to damage the valve guide, damage the cylinder head structure, or even accidentally injure itself; the pneumatic punch ejection method requires an air pump, an air pipeline and other related parts, and always requires sufficient air pressure, so it is not portable. In addition, the pneumatic punch will generate a lot of noise during inflation, operation and pressure relief, causing sound pollution.

[0079] In this regard, the embodiment of the present application provides a valve guide removal device with a relatively simple structure, small size and strong practicality. Figure 1 The valve guide disassembly device comprises a clamping mechanism 1, an ejection mechanism 2 and a fixing mechanism 3.

[0080] The clamping mechanism 1 is suitable for clamping the cylinder head. When the valve guide is removed, the cylinder head needs to be fixed by the clamping mechanism first, and then the valve guide on the cylinder head is removed by the ejection mechanism.

[0081] The fixing mechanism 3 is fixedly connected to the clamping mechanism 1 and is used to fix the ejection mechanism.

[0082] The ejection mechanism 2 includes an ejection member 21, a force member 22 and a guide member 23. The guide member 23 is sleeved on the ejection member 21 and is used to guide the ejection member. The ejection member 21 is threadedly connected to the guide member 23, so that the force member 22 can make the ejection member 21 spirally move forward relative to the guide member 23 when rotating, and then when the ejection member is aligned with the valve guide on the cylinder head (that is, the central axis of the ejection member is colinear with the central axis of the valve guide), the ejection member is spirally moved forward by tightening the force member, thereby ejecting the valve guide.

[0083] The guide member 23 is connected to the fixing mechanism 3 via a pin shaft, so that the installation angle of the guide member 23 relative to the fixing mechanism 3 can be adjusted, thereby making the forward angle of the ejector 21 adjustable. Thus, the ejector is suitable for ejecting valve guides in cylinder heads of different models or sizes, and has strong applicability.

[0084] The embodiment of the present application provides a heat valve guide disassembly device that uses a threaded screw hole to tighten so that the ejector part impacts the valve guide downward to disassemble the valve guide. The implementation conditions are relatively simple, and the force application process is controllable. In addition, the angle of the ejector part is adjustable, so it is suitable for disassembling valve guides on cylinder heads of different models, and the device is highly practical. In addition, the overall structure of the device is relatively simple, the volume is relatively small, and it is easy to carry.

[0085] It should be noted that the ejector of the ejection mechanism has a working angle. Since the ejection mechanism is installed in the guide member, the working angle of the ejector can be controlled by adjusting the installation angle of the guide member. In the embodiment of the present application, when removing the valve guide, the central axis of the ejector needs to be collinear with the central axis of the valve guide. At this time, the working angle of the ejector is the target working angle.

[0086] In some embodiments, the guide member 23 may have a sleeve structure with an internal thread, and the ejector is rod-shaped with an external thread, whereby when the ejector is fitted into the guide member, the ejector can be spirally advanced relative to the guide member by rotating the application member.

[0087] In some embodiments, see Figure 2 and Figure 3 , the ejector 21 may include a force transmission rod 211 and a punch 212. The first end of the force transmission rod 211 is connected to the force applying member 22, and the second end of the force transmission rod 211 is connected to the punch 212. That is, the ejector 21 is divided into two parts: the force transmission rod 211 and the punch 212, wherein the force transmission rod is used to transmit the torque to the punch so that the punch advances axially in a spiral direction, and the punch is used to directly act on the valve guide to eject the valve guide. By dividing the ejector into the above two parts, it is possible to avoid the ejector part from breaking due to excessive length when disassembling the valve guide. In addition, this can also convert the rotational feed of the force transmission rod into the linear feed of the punch, effectively avoiding the damage to the end face of the valve guide caused by the rotational friction, and realizing the non-destructive disassembly and assembly of the guide.

[0088] In some embodiments, the end surface of the second end of the force transmission rod 211 may be a protrusion 2111 having a first curved surface; the end of the punch 212 connected to the force transmission rod 211 may have a recess 2121, and the recess 2121 has a second curved surface that is concave. When the protrusion 2111 fits into the recess 2121, the first curved surface is in contact with the second curved surface, for example, the first curved surface and the second curved surface are in an inscribed relationship. Therefore, even if a slight offset occurs between the force transmission rod and the punch during the disassembly process, the first curved surface and the second curved surface can still maintain a contact relationship, and the force transmission rod to the punch is not hindered.

[0089] It should be understood that the size of the protrusion 2111 is slightly smaller than the size of the recess 2121, so that the protrusion can be embedded in the recess.

[0090] In some embodiments, Figure 2 and Figure 3 As shown, the punch 212 may have an ejector portion 2122 and a guide portion 2123, wherein the ejector portion 2122 is away from the valve guide relative to the guide portion 2123. The guide portion 2123 and the ejector portion 2122 are both cylindrical rod-shaped, and the diameter of the guide portion is smaller than the diameter of the ejector portion and the diameter of the valve guide, and the diameter of the ejector portion is equal to or slightly larger than the diameter of the valve guide, so that under the guidance of the guide portion, the punch can be relatively smoothly fitted into the valve guide. When the guide portion completely enters the valve guide, the end of the ejector portion can abut against the end of the valve guide, so that the valve guide is ejected by continuously tightening the ejector mechanism to move the ejector portion toward the valve guide.

[0091] In some embodiments, Figure 2 As shown, the clamping mechanism 1 may include an upper clamping body 11, a lower clamping body 12 and a clamping locking assembly 13. A clamping space is formed between the upper clamping body 11 and the lower clamping body 12, so that when disassembling, the cylinder head is placed in the clamping space and clamped by the upper clamping body 11 and the lower clamping body 12. One end of the clamping locking assembly 13 is connected to the upper clamping body 11, and the other end is connected to the lower clamping body 12, so that the distance between the upper clamping body 11 and the lower clamping body 12 is adjustable, and the cylinder head is clamped between the upper clamping body 11 and the lower clamping body 12.

[0092] The upper clamping body 11 and the lower clamping body 12 are distributed in the upper and lower directions of the valve guide removal device and are spaced a certain distance apart.

[0093] Specifically, when disassembling the valve guide, the distance between the upper clamping body 11 and the lower clamping body 12 is large to facilitate placing the cylinder head in the clamping space formed by the two. After the cylinder head is inverted on the lower clamping body 12, the central axis of the ejector installed in the guide is aligned with the central axis of the valve guide in the cylinder head by adjusting the angle of the cylinder head and the guide. In this case, the distance between the upper clamping body 11 and the lower clamping body 12 is reduced by adjusting the clamping and locking assembly 13 until both the upper clamping body 11 and the lower clamping body 12 are in contact with the cylinder head. At this time, the cylinder head is locked between the upper clamping body 11 and the lower clamping body 12 by the clamping and locking assembly 13, thereby ensuring that the cylinder head will not move during the disassembly process.

[0094] In some embodiments, Figure 4 As shown, the upper clamping body 11 may have a first connection portion 111 and a first clamping portion 112, and the lower clamping body 12 may have a second connection portion 121 and a second clamping portion 122. The first clamping portion 112 and the second clamping portion 122 are used to clamp the cylinder head, that is, when disassembling, the cylinder head contacts the first clamping portion and the second clamping portion. The first connection portion 111 is connected to the second connection portion 121.

[0095] In some embodiments, the clamping and locking assembly 13 may include a bolt 1311 and a nut 1312, and the first clamping body and the second clamping body both have threaded holes that cooperate with the above-mentioned bolts, so that the bolt passes through the threaded hole on the second clamping body, and the bolt passing through the second clamping body passes through the threaded hole on the first clamping body, thereby realizing the connection between the first clamping body and the second clamping body and the distance between the two is adjustable.

[0096] In some embodiments, the lower clamping body 12 is used as the base of the entire valve guide removal device. To ensure its stability, a countersunk groove is provided on the bottom surface of the lower clamping body 12, and the bolt head is embedded in the countersunk groove and does not protrude from the bottom surface from the countersunk groove, so that when the lower clamping body is placed on a plane, the bottom surface of the base can remain flat.

[0097] In some embodiments, see Figure 4 , the first clamping portion 112 may have a bending portion 1121 and an end plate portion 1122. The bending portion 1121 extends in a direction away from the main body of the first clamping portion 112 and close to the second clamping portion 122, for example, the bending portion is substantially perpendicular to the main body of the first clamping portion 112 and extends in a direction perpendicular to the main body of the first clamping portion 112. Here, the main body of the first clamping portion 112 refers to the portion of the first clamping portion used to clamp the cylinder head. The end plate portion 1122 is connected to the bending portion 1121 and is parallel to the second clamping portion 122. For example, the end plate portion 1122 is substantially perpendicular to the bending portion and parallel to the second clamping portion 122.

[0098] The lower clamping body 12 and the end plate 1122 both have threaded holes that cooperate with the bolts 1311, so that the cylinder head can be clamped between the upper and lower clamping bodies by fitting the bolts to the threaded holes on the lower clamping body 12 and the end plate 1122 and tightening them with nuts.

[0099] See also Figure 4 The end plate portion 1122 and the bent portion 1121 can form a step-like structure, so that the height of the end plate portion in the vertical direction of the valve guide removal device is lower than the first clamping portion 112. Based on this, the screw length of the bolt used to connect the end plate portion and the lower clamping body is relatively short, thereby reducing the risk of the screw breaking due to excessive length.

[0100] In some embodiments, Figure 4 As shown, the first clamping portion 112 and the second clamping portion 122 may both be in the shape of long plates and both extend perpendicularly to the up-and-down direction of the valve guide removal device.

[0101] In some embodiments, Figure 1 As shown, the first connection part 111 may have a sleeve structure, and the second connection part 121 is embedded in the sleeve structure. For example, the second clamping part 122 is bent upward to form the second connection part 121, and the second connection part 121 extends upward. Based on this, the connection between the first connection part 111 and the second connection part 121 is achieved by embedding the second connection part in the above-mentioned sleeve structure. In this embodiment, the upper clamping body 11 and the lower clamping body 12 are connected at one end perpendicular to the up and down direction, and the other end is not connected to form an opening, thereby forming a "C"-shaped structure between the upper clamping body 11 and the lower clamping body 12.

[0102] On this basis, considering that locking with the clamping locking assembly only at one end of the clamping mechanism perpendicular to the up and down direction may cause one end of the locking three-dimensionally to be expanded due to unbalanced force on both sides of the clamping mechanism, in this embodiment, the clamping locking assembly 13 may include a first locking assembly 131 and a second locking assembly 132, wherein the first locking assembly 131 and the second locking assembly 132 are respectively located at the two ends of the clamping mechanism 1 perpendicular to the up and down direction, thereby locking the cylinder cover between the upper clamping body 11 and the lower clamping body 12 by arranging the first locking assembly 131 and the second locking assembly 132 at the two ends of the clamping mechanism respectively, so that the overall force of the clamping mechanism can be balanced, thereby ensuring the stability of the clamped cylinder cover.

[0103] The first locking assembly 131 and the second locking assembly 132 may each include a bolt and a nut.

[0104] In some embodiments, a buffer pad 14 may be provided on the side opposite to each other of the first clamping portion 112 and the second clamping portion 122, that is, a buffer pad is provided on the surface of the first clamping portion 112 and the second clamping portion 122 contacting the cylinder head, and the buffer pad can protect the cylinder head and improve the stability of the cylinder head being clamped. The buffer pad can be made of rubber.

[0105] In some embodiments, Figure 5 As shown, the guide element 23 may have a connecting lug 231 .

[0106] The fixing mechanism 3 may include a base 31, a fixing member 32 and a clamping assembly 33. The fixing member 32 is connected to the connecting ear 231 via a pin, so that the guide member can rotate around the pin to change the working angle of the ejector. The fixing member 32 and the clamping assembly 33 are both fixed to the base 31. The base 31 is fixed to the upper clamping body 11, that is, the entire fixing mechanism is located on the upper clamping body 11.

[0107] The tightening assembly 33 may be located below the connecting ear 231 to prevent the connecting ear 231 from rotating downward around the pin axis, that is, the tightening assembly 33 can prevent the working angle of the ejection mechanism from changing.

[0108] In some embodiments, Figure 5 As shown, the push-up assembly 33 may include an abutment 331 and a locking assembly 332. One end of the abutment 331 is rotatably connected to the base 31 through a pin, and the other end contacts the connecting ear 231. Based on this, the position of the abutment can be changed, so that it can contact the connecting ear at different angles, that is, it can ensure that the working angle of the ejection mechanism at different working angles remains unchanged. The locking assembly 332 is located below the abutment 331 and abuts against the abutment 331, and is used to prevent the abutment 331 from rotating downward around the pin. After the angle adjustment of the abutment is completed (that is, the installation angle of the guide member can make the central axis of the ejection member and the central axis of the valve guide collinear and the abutment can contact the connecting ear), in order to ensure that the working angle of the ejection member remains unchanged through the abutment, the locking assembly 332 located below the abutment is used to lock the abutment to prevent the abutment 331 from rotating downward around the pin.

[0109] In some embodiments, Figure 5 As shown, the locking assembly 332 may include a bracket body 3321 and a screw-in screw 3322. The bracket body is fixed on the base 31, and the bracket body has a mounting hole with an internal thread, and the screw-in screw cooperates with the mounting hole. By tightening the screw-in screw, the screw-in screw is spirally advanced and the front end of the screw-in screw is pressed against the abutment, thereby preventing the abutment 331 from rotating downward around the pin.

[0110] In some embodiments, the interconnected parts of the abutment 331 and the connecting ear 231 are arc surfaces, that is, the abutment and the connecting ear are tangent to each other, thereby ensuring good contact between the abutment and the connecting ear.

[0111] In some embodiments, Figure 5 As shown, the side of the abutment member 331 close to the locking assembly 332 may have an abutment portion 3311, and the abutment portion 3311 has an arc-shaped surface protruding outward, and the locking assembly 332 abuts against the arc-shaped surface. During the disassembly process, a slight offset may occur between the locking assembly and the abutment member, and the arc-shaped surface on which the abutment member contacts the locking assembly can ensure that the contact state is maintained even when the two are offset.

[0112] In some embodiments, Figure 5 As shown, the fixing mechanism 3 may further include a clamping assembly 34. One end of the clamping assembly 34 is fixed to the base 31, and the other end abuts against the connecting ear 231, and is located on the side of the ejection mechanism 2 close to the force-applying member 22, and is used to clamp the connecting ear 231. The clamping assembly can apply downward pressure to the guide member, so that the clamping assembly and the ejection assembly limit the guide member in two directions respectively, thereby fully ensuring that the working angle of the ejection member remains unchanged during the disassembly process.

[0113] In some embodiments, Figure 5 As shown, the pressing assembly 34 may include a pressing member 341 and a column 342. The bottom of the column 342 is fixed to the base 31. One end of the pressing member 341 is movably connected to the column 342, and the other end is pressed against the connecting ear 231. The height of the pressing member in the up and down direction of the device is variable, which is suitable for pressing the connecting ear at an angle.

[0114] In some embodiments, the column 342 has an external thread, and the clamping piece 341 extends as a whole in a direction perpendicular to the up and down direction and has a mounting hole near one end of the column. The mounting hole has an internal thread that cooperates with the external thread of the column, thereby enabling the connection between the column and the clamping piece and the adjustment of the height of the clamping piece.

[0115] In some embodiments, the interconnected parts of the clamping member 341 and the connecting ear can be arc surfaces, that is, the clamping member and the connecting ear are tangent to each other, thereby ensuring good contact between the clamping member and the connecting ear.

[0116] In some embodiments, Figure 1 and Figure 6As shown, the upper clamping body 11 may have two mounting grooves 113 distributed along its width direction, and the two mounting grooves 113 are not connected to each other and are used to accommodate the base 31 alternatively. "Two mounting grooves can accommodate the base alternatively" means that the two mounting grooves do not accommodate the base at the same time, and only one of the mounting grooves accommodates the base during disassembly. For a multi-cylinder engine, due to the different positions of different cylinders and the limitations of the device structure, the ejection mechanism may only be suitable for ejecting the valve guide in a single cylinder among the multiple cylinders. Two mounting grooves are provided on the upper clamping body, so that the ejection mechanism is suitable for the valve guide in the cylinder that cannot be disassembled before by changing the installation position of the ejection mechanism (that is, installing the upper clamping body installed in one mounting groove into another groove). When the base is installed in the above-mentioned mounting groove, the ejection member 21 extends downward from the outer side of the mounting groove 113 to facilitate the extension into the valve guide in the cylinder.

[0117] The following is an introduction to the method for using the valve guide removal device provided in the embodiment of the present application in conjunction with the accompanying drawings:

[0118] Before disassembly, the entire device is placed on a flat workbench, and a certain distance is opened between the upper clamping body and the lower clamping body to form a clamping space for clamping the cylinder head.

[0119] See also Figure 3 and Figure 6 When disassembling, first put the cylinder head 4 upside down in the clamping space formed by the upper clamping body and the lower clamping body. In order to maintain the stability of the clamping, a pad can be used to pad the bottom of the cylinder head that does not contact the lower clamping body to keep the overall balance of the cover to avoid rollover.

[0120] First, fit the long positioning screw into the guide and adjust the angle of the guide, while moving the cylinder head so that the long positioning screw passes through the valve guide 5. At this time, the central axis of the guide is in line with the central axis of the valve guide. Use the clamping and locking assembly to lock the cylinder head between the upper and lower clamping bodies, and use the pressing assembly and the tightening assembly to limit the connecting ear of the guide, thereby locking the position of the guide.

[0121] Then, after removing the positioning long screw from the guide, insert the punch into the valve guide and screw the force transmission rod into the guide. Since the punch has been inserted into the valve guide, the center axis of the punch is collinear with the center axis of the valve guide. The center axis of the guide is collinear with the center axis of the valve guide, so that the force transmission rod embedded in the guide is also collinear with the center axis of the valve guide.

[0122] Finally, on the basis that the force transfer rod and the punch are in line, a force-applying member is used to apply a torque in the axial direction of the force transfer rod, thereby slowly rotating the force transfer rod. As a result, the force transfer rod drives the punch to feed downward along the axial direction of the valve guide, and finally the valve guide is successfully ejected.

[0123] It should be noted that when screwing in the dowel rod, you should avoid pressing the guide piece and avoid turning the dowel rod rapidly.

[0124] The valve guide disassembly device provided in the embodiment of the present application is not only suitable for ejecting the valve guide from the cylinder head, but also suitable for manual press-fitting of press-fit parts such as valve guides, bowl-shaped plugs, and steel balls, and the press-fitting method is basically the same as the guide removal method. Based on different specific uses, the valve guide disassembly device provided in the embodiment of the present application can be integrated with components such as strain gauges to expand its ability to measure the press-fit force, so as to achieve specific uses.

[0125] It should be noted that, under the premise that no contradiction occurs, the above embodiments of the present application can be combined or coupled with each other.

[0126] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the present application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.

[0127] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A valve guide removal device, characterized in that: The device comprises a clamping mechanism (1), an ejecting mechanism (2) and a fixing mechanism (3); The clamping mechanism (1) is suitable for clamping the cylinder head; The fixing mechanism (3) is fixedly connected to the clamping mechanism (1); The ejection mechanism (2) comprises an ejection member (21), a force applying member (22) and a guide member (23); the guide member (23) is sleeved on the ejection member (21), the ejection member (21) is threadedly connected to the guide member (23), and the force applying member (22) is used to make the ejection member (21) spirally move forward relative to the guide member (23) when rotating; The guide member (23) is connected to the fixing mechanism (3) via a pin shaft, and the installation angle of the guide member (23) relative to the fixing mechanism (3) is adjustable so that the advancing angle of the ejector (21) can be adjusted; The clamping mechanism (1) comprises an upper clamping body (11), a lower clamping body (12) and a clamping locking assembly (13); A clamping space is formed between the upper clamping body (11) and the lower clamping body (12), and the clamping space is used to accommodate the cylinder head so as to clamp the cylinder head between the upper clamping body (11) and the lower clamping body (12); One end of the clamping and locking assembly (13) is connected to the upper clamping body (11), and the other end is connected to the lower clamping body (12), so that the distance between the upper clamping body (11) and the lower clamping body (12) can be adjusted and the cylinder head is clamped between the upper clamping body (11) and the lower clamping body (12); The guide member (23) has a connecting ear (231); The fixing mechanism (3) comprises a base (31), and a fixing member (32) and a tightening assembly (33) fixed to the base (31); The fixing member (32) is connected to the connecting ear (231) via a pin; The base (31) is fixed on the upper clamping body (11); The tightening assembly (33) is located below the connecting ear (231) and is used to prevent the connecting ear (231) from rotating downward around the pin axis; The tightening assembly (33) comprises an abutment member (331) and a locking assembly (332); One end of the abutment member (331) is rotatably connected to the base (31) via a pin, and the other end is in contact with the connection ear (231); The locking assembly (332) is located below the abutment member (331) and abuts against the abutment member (331), and is used to prevent the abutment member (331) from rotating downward around the pin axis.

2. The valve guide removal device according to claim 1, characterized in that: The ejector (21) comprises a force transmission rod (211) and a punch (212); The first end of the force transmission rod (211) is connected to the force applying member (22), and the second end of the force transmission rod (211) is connected to the punch (212); The end face of the second end of the force transmission rod (211) is a protrusion (2111) having a first curved surface; the end of the punch (212) connected to the force transmission rod (211) has a recess (2121), and the recess (2121) has a concave second curved surface; when the protrusion (2111) is fitted into the recess (2121), the first curved surface is in contact with the second curved surface.

3. The valve guide removal device according to claim 1, characterized in that: The upper clamping body (11) comprises a first connecting portion (111) and a first clamping portion (112). The lower clamping body (12) has a second connecting portion (121) and a second clamping portion (122). The first clamping portion (112) and the second clamping portion (122) are used to clamp the cylinder cover. The first connection portion (111) is connected to the second connection portion (121).

4. The valve guide removal device according to claim 3, characterized in that: The clamping and locking assembly (13) comprises a bolt (1311) and a nut (1312); The first clamping portion (112) comprises a bending portion (1121) and an end plate portion (1122), wherein the bending portion (1121) extends in a direction away from the main body of the first clamping portion (112) and close to the second clamping portion (122), and the end plate portion (1122) is connected to the bending portion (1121) and is parallel to the second clamping portion (122); The lower clamping body (12) and the end plate portion (1122) both have threaded holes that cooperate with the bolts (1311).

5. The valve guide removal device according to claim 3, characterized in that: One end of the first connection portion (111) perpendicular to the up-down direction has a sleeve structure, and the second connection portion (121) is embedded in the sleeve structure.

6. The valve guide removal device according to claim 5, characterized in that: The clamping and locking assembly (13) comprises a first locking assembly (131) and a second locking assembly (132); The first locking assembly (131) and the second locking assembly (132) are respectively located at two ends of the clamping mechanism (1) perpendicular to the up and down directions.

7. The valve guide removal device according to claim 4, characterized in that: A buffer pad (14) is provided on one side of the first clamping portion (112) and the other side of the second clamping portion (122) that are opposite to each other.

8. The valve guide removal device according to claim 1, characterized in that: The abutment member (331) has an abutment portion (3311) on one side close to the locking assembly (332), and the abutment portion (3311) has an arc-shaped surface protruding outward, and the locking assembly (332) abuts against the arc-shaped surface.

9. The valve guide removal device according to claim 1, characterized in that: The fixing mechanism (3) further comprises a pressing assembly (34); One end of the clamping assembly (34) is fixed to the base (31), and the other end abuts against the connecting ear (231). It is located on a side of the ejection mechanism (2) close to the force applying member (22) and is used to clamp the connecting ear (231).

10. The valve guide removal device according to claim 9, characterized in that: The pressing assembly (34) comprises a pressing member (341) and a column (342); The bottom of the column (342) is fixed to the base (31); One end of the pressing member (341) is movably connected to the column (342), and the other end is pressed against the connecting ear (231).

11. The valve guide removal device according to claim 1, characterized in that: The upper clamping body (11) has two mounting grooves (113) distributed along its width direction; The two mounting grooves (113) are not connected to each other and are used to alternatively accommodate the base (31); the ejector (21) extends downward from the outer side of the mounting groove (113) on which the base (31) is mounted.

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