Special tool for disassembling and assembling engine valve

Abstract

The utility model relates to a special tool for disassembling and assembling an engine valve. The special tool for disassembling and assembling the engine valve comprises the valve, a positioning pin and a valve spring, and further comprises an adjusting nut and a locking nut, external threads allowing the adjusting nut and the locking nut to pass through are formed in the two ends of the connecting bolt respectively; a bolt hole allowing one end of a connecting bolt to pass through is formed in the middle of the first flange plate, and a pair of positioning pin holes matched with the positioning pins and two pairs of limiting holes matched with the air valve are symmetrically formed in the first flange plate; a bolt hole allowing the other end of the connecting bolt to pass through is formed in the middle of the second flange plate. The adjusting nut is tightened to compress the valve spring, so that the valve lock plate can be taken out, the four valves on the same air cylinder can be disassembled and assembled, tools such as a rubber hammer or a copper bar do not need to be used for knocking the tops of the valves in the whole disassembling and assembling process, devices cannot be damaged, and the problem that the service life of the devices is shortened is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of engine assembly and maintenance, and in particular to a special tool for disassembling and assembling an engine valve. Background Art

[0002] With the continuous expansion and improvement of the engine industry, the substantial improvement in engine performance is developing towards high speed and high horsepower. The engine cylinder head valve has been gradually upgraded from a two-valve structure to a four-valve structure. In this way, the elastic force of the valve spring has also changed. During the disassembly and assembly of the valve, the relevant technical requirements are further improved.

[0003] The traditional disassembly and assembly method is to use a rubber hammer or a copper rod to knock on the top of the valve so that the valve lock plate can be removed. After the valve lock plate is removed, the valve disassembly and assembly is completed. However, this disassembly and assembly method is likely to cause damage to the device, resulting in a reduction in its service life cycle. Utility Model Content

[0004] In order to solve or partially solve the problems existing in the related art, the present application provides a special tool for disassembling and assembling an engine valve.

[0005] To achieve the above objectives, this application is implemented through the following technical solutions:

[0006] A special tool for disassembling and assembling an engine valve, comprising a valve, a positioning pin and a valve spring, and the special tool for disassembling and assembling an engine valve further comprises:

[0007] Adjusting nuts and lock nuts;

[0008] The connecting bolt has external threads at both ends thereof that allow the adjusting nut and the locking nut to pass through;

[0009] A first flange plate, wherein a bolt hole is provided in the middle thereof to allow one end of a connecting bolt to pass through, and a pair of positioning pin holes matching the positioning pin and two pairs of limiting holes matching the valve are symmetrically provided on the first flange plate;

[0010] The second flange plate has a bolt hole in its center for allowing the other end of the connecting bolt to pass through.

[0011] Optionally, the locating pin hole has a chamfer.

[0012] Optionally, the bolt hole opened in the middle of the first flange plate has a diameter of 13 mm.

[0013] Optionally, the diameter of the positioning pin hole is 11 mm.

[0014] Optionally, the diameter of the limiting hole is 20 mm.

[0015] Optionally, two locking nuts are provided.

[0016] Optionally, the first flange plate and the second flange plate are made of Q460 steel.

[0017] The beneficial effects of the present application are as follows: the present application fastens the second flange plate to one end of the connecting bolt by setting a locking nut, connects the first flange plate to the connecting bolt by setting an adjusting nut, and compresses the valve spring by tightening the adjusting nut so that the valve locking plate can be removed, thereby completing the disassembly and assembly of four valves on the same cylinder. The entire disassembly and assembly process does not require the use of tools such as rubber hammers or copper rods to knock on the top of the valve, and will not cause damage to the device, thereby avoiding the problem of reduced service life cycle of the device.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0020] Figure 1 It is a structural schematic diagram of a special tool for disassembling and assembling an engine valve shown in an embodiment of the present application;

[0021] Figure 2 is a top view of a first flange plate shown in an embodiment of the present application;

[0022] Figure 3 is a top view of the second flange plate shown in the embodiment of the present application.

[0023] Figure numerals: 1 adjusting nut, 2 first flange plate, 3 connecting bolt, 4 valve spring, 5 second flange plate, 6 locking nut, 7 positioning pin hole, 8 limiting hole. DETAILED DESCRIPTION

[0024] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific situation.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0029] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

[0030] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0031] In order to make the purpose, technical solutions and beneficial effects of the present application clearer, the preferred embodiments of the present application will be described in detail below in conjunction with the accompanying drawings to facilitate understanding by technical personnel.

[0032] Embodiment 1:

[0033] See also Figures 1 to 3 , a special tool for disassembling and assembling an engine valve, comprising a valve, a locating pin and a valve spring 4, the special tool for disassembling and assembling an engine valve also comprises:

[0034] Adjusting nut 1 and locking nut 6;

[0035] The connecting bolt 3 has external threads at both ends thereof, which allow the adjusting nut 1 and the locking nut 6 to pass through;

[0036] The first flange plate 2 has a bolt hole in the middle for allowing one end of the connecting bolt 3 to pass through, and a pair of positioning pin holes 7 matching the positioning pin and two pairs of limiting holes 8 matching the valve are symmetrically formed thereon;

[0037] The second flange plate 5 has a bolt hole in its center for allowing the other end of the connecting bolt 3 to pass through.

[0038] Specifically, the valve, the positioning pin and the valve spring 4 are all engine components, and their structures are prior art, which will not be described in detail here. The outer diameter of the external thread of one end of the connecting bolt 3 matching with the adjusting nut 1 is larger than the outer diameter of the external thread of one end of the connecting bolt 3 matching with the locking nut 6. Correspondingly, the bolt hole opened in the middle of the first flange plate 2 is larger than the bolt hole opened in the middle of the second flange plate 5.

[0039] When in use, pass the connecting bolt 3 through the injector hole of the cylinder head of the engine, pass the bolt hole in the middle of the second flange plate 5 through one end of the connecting bolt 3 and place it on the back of the cylinder head, use the locking nut 6 to tighten the second flange plate 5, pass the bolt hole in the middle of the first flange plate 2 through the other end of the connecting bolt 3, use the adjusting nut 1 to connect the first flange plate 2 with the connecting bolt 3, adjust the position of the first flange plate 2, make the locating pin hole 7 correspond to the two locating pins on the engine cylinder, make the limiting hole 8 correspond to the four valves on the engine cylinder, and then tighten the adjusting nut 1 to compress the valve spring 4 until the valve lock plate can be taken out. After removing the valve lock plate, rotate the adjusting nut 1 in the opposite direction to loosen the adjusting nut 1, thereby completing the disassembly and assembly of the four valves on the same cylinder of the engine;

[0040] In this embodiment, the second flange plate 5 is fastened to one end of the connecting bolt 3 by setting a locking nut 6, and the first flange plate 2 is connected to the connecting bolt 3 by setting an adjusting nut 1. The valve spring 4 is compressed by tightening the adjusting nut 1 so that the valve locking plate can be removed, thereby completing the disassembly and assembly of the four valves on the same cylinder. The entire disassembly and assembly process does not require the use of tools such as rubber hammers or copper rods to knock on the top of the valve, and will not cause damage to the device, thereby avoiding the problem of reduced device service life cycle.

[0041] In addition, using this tool, only one person is needed to achieve the simultaneous disassembly and assembly of four valves, which can shorten the time. The tool can be disassembled and combined, which not only reduces the skill level requirements of the maintenance personnel, but also can complete the disassembly and assembly of the valves in the same cylinder at the same time. By providing the positioning pin hole 7 to reduce the positioning difficulty and increase the positioning speed, the disassembly and assembly can be completed efficiently and quickly. At the same time, the use of tools to assist in disassembly and assembly can also improve and control the maintenance quality.

[0042] Embodiment 2:

[0043] See also Figures 1 to 3 Further and optionally, the positioning pin hole 7 has a chamfer.

[0044] Specifically, in this embodiment, the positioning pin hole 7 is provided to avoid the problem of center point deviation during the compression adjustment process. At the same time, a chamfer is provided on the positioning pin hole 7 to serve as a guide during assembly, helping the positioning pin to be smoothly aligned and assembled.

[0045] Further and optionally, the bolt hole opened in the middle of the first flange plate 2 has a diameter of 13 mm.

[0046] Specifically, the aperture size of the bolt hole is designed according to the diameter of the connecting bolt 3. The aperture size of the bolt hole is 0.1-0.3 mm larger than the diameter of the connecting bolt 3 to facilitate the passage of the connecting bolt 3, thereby facilitating assembly and ensuring the reliability of the mechanical connection. In this embodiment, the aperture size of the bolt hole in the middle of the first flange plate 2 is set to 13 mm to meet the requirements.

[0047] Further and optionally, the diameter of the positioning pin hole 7 is 11 mm.

[0048] Specifically, the diameter of the positioning pin hole 7 is set according to the diameter of the positioning pin on the cylinder. In this embodiment, the diameter of the positioning pin hole 7 is set to 11 mm to meet the requirements.

[0049] Further and optionally, the diameter of the limiting hole 8 is 20 mm.

[0050] Specifically, the diameter of the limiting hole 8 is opened according to the valve diameter on the cylinder. The diameter of the limiting hole 8 is 0.1-0.3 mm larger than the diameter of the valve to facilitate the passage of the valve. At the same time, the diameter of the limiting hole 8 is smaller than the diameter of the valve spring 4 to facilitate the first flange plate 2 to press against the valve spring 4 to compress it.

[0051] Further and optionally, two locking nuts 6 are provided.

[0052] Specifically, two locking nuts 6 are threadedly connected to one end of the connecting bolt 3, and the second flange plate 5 is connected and fastened to the connecting bolt 3 through the locking nuts 6. Two locking nuts 6 are provided to prevent loosening and improve the stability of the connection.

[0053] Further and optionally, the first flange plate 2 and the second flange plate 5 are made of Q460 steel.

[0054] Specifically, Q460C steel plate is a high-strength low-alloy structural steel plate with excellent mechanical properties and welding properties. Its characteristics include high strength, good plasticity, excellent welding performance, good corrosion resistance and processing performance, which can ensure the service life of the tool.

[0055] To summarize, the present application sets a locking nut 6 to fasten the second flange plate 5 to one end of the connecting bolt 3, sets an adjusting nut 1 to connect the first flange plate 2 to the connecting bolt 3, and tightens the adjusting nut 1 to compress the valve spring 4 so that the valve lock plate can be removed, thereby completing the disassembly and assembly of the four valves on the same cylinder. The entire disassembly and assembly process does not require the use of tools such as rubber hammers or copper rods to knock on the top of the valve, and will not cause damage to the device, thereby avoiding the problem of reduced device service life cycle.

[0056] In addition, only one person is needed to disassemble and assemble four valves at the same time by using this tool, which can shorten the time. The tool can be disassembled and combined, which not only reduces the skill level requirements of the maintenance personnel, but also can complete the disassembly and assembly of the valves in the same cylinder at the same time. By providing the positioning pin hole 7 to reduce the positioning difficulty and speed up the positioning speed, the disassembly and assembly can be completed efficiently and quickly. At the same time, the use of tools to assist in disassembly and assembly can also improve and control the maintenance quality.

[0057] The present application provides a chamfer on the locating pin hole 7, which can serve as a guide during assembly to help the locating pin to be aligned and assembled smoothly;

[0058] The present application provides two locking nuts 6 to prevent loosening, thereby improving the stability of the connection.

[0059] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application; the dimensions of the drawings are not related to the specific objects, and the dimensions of the objects can be changed arbitrarily.

Claims

1. A special tool for disassembling and assembling an engine valve, comprising a valve, a locating pin and a valve spring (4), characterized in that: The engine valve disassembly and assembly special tool also includes: Adjusting nut (1) and locking nut (6); The connecting bolt (3) has external threads at both ends thereof for allowing the adjusting nut (1) and the locking nut (6) to pass through; A first flange plate (2) having a bolt hole in the middle thereof for allowing one end of a connecting bolt (3) to pass through, and having a pair of positioning pin holes (7) matching the positioning pin and two pairs of limiting holes (8) matching the valve symmetrically formed thereon; The second flange plate (5) has a bolt hole in its center for allowing the other end of the connecting bolt (3) to pass through.

2. The engine valve disassembly and assembly special tool according to claim 1, characterized in that: The positioning pin hole (7) has a chamfer.

3. The engine valve disassembly and assembly special tool according to claim 1, characterized in that: The bolt hole opened in the middle of the first flange plate (2) has a diameter of 13 mm.

4. The engine valve disassembly and assembly tool according to claim 1, characterized in that: The diameter of the positioning pin hole (7) is 11 mm.

5. The engine valve disassembly and assembly special tool as claimed in claim 1, characterized in that: The diameter of the limiting hole (8) is 20 mm.

6. The engine valve disassembly and assembly special tool as claimed in claim 1, characterized in that: The locking nuts (6) are provided with two.

7. The engine valve disassembly and assembly special tool according to claim 1 or 3, characterized in that: The first flange plate (2) and the second flange plate (5) are made of Q460 steel.

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