Dismounting and mounting integrated tool for valve guide pipe of engine

Abstract

The utility model relates to the technical field of engines, and discloses an engine valve guide pipe dismounting and mounting integrated tool which comprises a guide rod, a thrust rod and a sleeve, the guide rod is connected to one end of the thrust rod, the diameter of the guide rod is smaller than that of the thrust rod, and the sleeve is arranged on the outer side of the connecting position of the guide rod and the thrust rod in a sleeving mode and connected with the thrust rod. A groove is formed in the end, facing the guide rod, of the sleeve. Mounting and dismounting of the valve guide pipe can be achieved by mounting the sleeve or not, the valve guide pipe dismounting tool is simple in structure and convenient to carry, damage to an air cylinder cover caused by stress direction deflection in the dismounting and mounting process of the valve guide pipe can be avoided, mounting precision is guaranteed, after-sales service staff can conveniently maintain an after-sales engine on site, and the service life of the after-sales service staff is prolonged. And the after-sales service cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an integrated tool for disassembling and installing an engine valve guide. Background Art

[0002] In the engine's valve train, the valve guide is a very important component. On the one hand, the valve guide provides guidance for the movement of the valve, ensuring that the valve can move along the correct straight line trajectory. At the same time, through the valve guide, the valve can fit correctly with the valve seat ring to ensure the sealing and smooth movement of the valve, and transfer the heat on the valve stem to the cylinder head to help cool and lubricate the valve system. It can be seen that the valve guide is often in a high temperature and friction state, and the working environment is relatively harsh.

[0003] During the after-sales service stage, if the valve guide needs to be repaired, it is necessary to first disassemble the valve guide and then install it. Both have high precision requirements. Once the precision is not met, it will affect the overall performance of the engine. More seriously, it may cause secondary failure of the cylinder head, causing the valve to fall off and causing the engine to pull the cylinder, greatly increasing the user's usage cost and after-sales service cost.

[0004] The existing valve guides are installed and removed using different tools, and because the guide sizes of different engines are different, different tools are also required for removal and installation, which is inconvenient to use and carry. In addition, the use of different tools for removal and installation may cause errors, causing inconvenience to the after-sales market. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the existing valve guide installation and removal tools are different, and there are many tools of different models, which are inconvenient to carry and have an impact on the installation accuracy.

[0006] In order to solve the above technical problems, the technical solution of the utility model is to provide an integrated tool for disassembly and installation of an engine valve guide, including a guide rod, a thrust rod and a sleeve, wherein the guide rod is connected to one end of the thrust rod, the diameter of the guide rod is smaller than the diameter of the thrust rod, the sleeve is sleeved on the outside of the connection between the guide rod and the thrust rod and is connected to the thrust rod, and a groove is provided on the end of the sleeve facing the guide rod.

[0007] Optionally, the guide rod and the thrust rod are both cylindrical rods, the thrust rod includes a hammering section and a connecting section, the hammering section is connected to the connecting section, and the diameter of the hammering section is larger than the diameter of the connecting section, and one end of the connecting section of the guide rod is connected to the thrust rod.

[0008] Optionally, the guide rod and the thrust rod are connected by means of threads, quick connectors or semicircular keys, and the sleeve is connected to the outside of the connecting section of the thrust rod by means of threads, quick connectors or semicircular keys.

[0009] In summary, the utility model can realize the installation and disassembly of the valve guide by simply installing the sleeve, has a simple structure, is easy to carry, and can avoid damage to the cylinder head due to the deviation of the force direction during the disassembly and installation of the valve guide, thereby ensuring the installation accuracy, facilitating on-site maintenance of the after-sales engine by after-sales service personnel, and reducing the cost of after-sales service. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 It is a cross-sectional schematic diagram of the valve guide removal tool of the utility model;

[0012] Figure 3 It is a cross-sectional schematic diagram of the valve guide installation tool of the utility model;

[0013] Figure 4 This is a schematic diagram of disassembling the valve guide of the utility model;

[0014] Figure 5 This is a schematic diagram of the connection between the valve guide and the sleeve of the utility model;

[0015] Figure 6 This is a schematic diagram of the installation of the valve guide of the utility model;

[0016] In the figure: 11, guide rod; 12, thrust rod; 13, sleeve; 3, valve guide; 4, cylinder head. DETAILED DESCRIPTION

[0017] The following combination Figure 1-6 The utility model is described in further detail.

[0018] The utility model discloses an integrated tool for disassembling and installing an engine valve guide. Figure 1 and Figure 5 , including a guide rod 11, a thrust rod 12 and a sleeve 13. The guide rod 11 is connected to one end of the thrust rod 12. The diameter of the guide rod 11 is smaller than the diameter of the thrust rod 12. The sleeve 13 is sleeved on the outside of the connection between the guide rod 11 and the thrust rod 12 and is connected to the thrust rod 12. A groove is provided on one end of the sleeve 13 facing the guide rod 11, and the groove can be matched with the end of the valve guide 3.

[0019] In a further embodiment, the guide rod 11 and the thrust rod 12 are both cylindrical rods, the thrust rod 12 includes a hammering section and a connecting section, the hammering section is connected to the connecting section, and the diameter of the hammering section is larger than the diameter of the connecting section, the guide rod 11 and the thrust rod 12 are connected at one end of the connecting section, the guide rod 11 and the thrust rod 12 are connected by threads, quick connectors or semicircular keys, and the sleeve 13 is connected to the outside of the connecting section of the thrust rod 12 by threads, quick connectors or semicircular keys.

[0020] The utility model can disassemble and install the valve guide 3. When disassembling, refer to Figure 2 and Figure 4 , assemble the guide rod 11 and the thrust rod 12 to form a valve guide removal tool, turn the cylinder head 4 over with the valve seat ring facing up, insert the assembled valve guide removal tool into the valve guide 3 from top to bottom, match the outer circle of the guide rod 11 with the inner hole of the valve guide 3, and the end face of the connecting section of the thrust rod 12 contacts the upper end face of the valve guide 3. After the valve guide removal tool and the valve guide 3 are assembled, slowly hammer the hammering end of the thrust rod 12 with a tool hammer, and the valve guide 3 is slowly and vertically pushed out of the cylinder head 4. Relying on the cooperation of the cylindrical surface, it can be ensured that the valve guide removal tool and the valve guide 3 are in the same direction, and the damage to the guide hole of the cylinder head 4 caused by the skewness of the valve guide 3 can be avoided during the removal process. Relying on the cooperation of the plane, it can be ensured that the tool and the guide are in a vertical state, the force is evenly applied, and the removal is more convenient.

[0021] When installing, refer to Figure 3 and Figure 6 , assemble the guide rod 11 and the thrust rod 12 in the above manner, then install the inner hole of the sleeve 13 to the outer side of the thrust rod 12 to form a valve guide installation tool, then place the cylinder head 4 normally with the valve seat ring facing downward, and assemble the assembled valve guide installation tool with the valve guide 3. The outer circle of the guide rod 11 matches the inner hole of the valve guide 3, and the axial matching between the two is used to ensure that the valve guide 3 does not shake or deform during the installation process. The groove on the sleeve 13 is in contact with the valve guide 3, and the height of the valve guide 3 protruding from the cylinder head 4 is guaranteed by the depth of the groove of the sleeve 13. After the valve guide installation tool and the valve guide 3 are assembled, the valve guide 3 is fixed in the tool, and the inner hole, outer circle and upper end face of the valve guide 3 are tightly matched with the tool. The tail insertion end of the guide is placed on the guide hole of the cylinder head 4, and then the hammer end of the thrust rod 12 is slowly hammered with a tool hammer until the end face of the sleeve 13 contacts the cylinder head 4. The valve guide 3 has been accurately pressed into the cylinder head 4, which not only ensures the pressing depth of the valve guide 3, but also ensures that the inner and outer holes of the valve guide 3 will not be deformed, and ensures the coaxiality of the inner and outer holes and the coaxiality of the valve guide 3 and the guide hole of the cylinder head 4.

[0022] In other embodiments, the sizes of the guide rod 11 and the sleeve 13 can be adjusted to adapt to the disassembly and installation of valve guides 3 of other specifications and configurations. The utility model forms a complete set of tools for installation and disassembly by combining guide rods 11, thrust rods 12, and sleeves 13 of different sizes, which can adapt to the disassembly and installation of valve guides 3 of different sizes, are easy to carry, and are convenient for after-sales service personnel to perform on-site maintenance of after-sales engines.

[0023] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An integrated tool for disassembling and installing an engine valve guide, characterized in that: The invention comprises a guide rod (11), a thrust rod (12) and a sleeve (13); the guide rod (11) is connected to one end of the thrust rod (12); the diameter of the guide rod (11) is smaller than the diameter of the thrust rod (12); the sleeve (13) is sleeved on the outside of the connection between the guide rod (11) and the thrust rod (12) and is connected to the thrust rod (12); and a groove is provided on one end of the sleeve (13) facing the guide rod (11).

2. The integrated tool for disassembling and installing an engine valve guide according to claim 1, characterized in that: The guide rod (11) and the thrust rod (12) are both cylindrical rods. The thrust rod (12) comprises a hammering section and a connecting section. The hammering section is connected to the connecting section, and the diameter of the hammering section is greater than the diameter of the connecting section. One end of the connecting section of the guide rod (11) and the thrust rod (12) are connected.

3. The integrated tool for disassembling and installing an engine valve guide according to claim 1, characterized in that: The guide rod (11) and the thrust rod (12) are connected by means of threads, quick connectors or semicircular keys, and the sleeve (13) is connected to the outside of the connection section of the thrust rod (12) by means of threads, quick connectors or semicircular keys.

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