Valve spring press fitting tool

Abstract

The utility model belongs to the technical field of machinery, and relates to a valve spring press fitting tool. The valve spring press-fitting tool is provided with a vertical rod, and a support used for being fixed to a platform is fixed to the lower end of the vertical rod. A lever is hinged to the upper end of the vertical rod; the lever is provided with a first horizontal section perpendicular to the vertical rod, an inclined section and a second horizontal section connected to the tail of the inclined section. A press-fitting valve spring assembly is hinged to the first horizontal section. The press-fitting valve spring assembly is provided with two supports. The upper ends of the two supports are connected into a whole through a pin shaft with holes. A press-fitting spring washer used for being pressed at one end of the valve guide rod is arranged at the lower end between the two supports. A stepped through hole is formed in the center of the press-fitting spring washer, and the inner diameter of the stepped through hole is larger than the diameter of the valve guide rod and smaller than the outer diameter of a valve spring arranged on the valve guide rod in a sleeving mode. The air valve spring press-fitting tool is simple and light in structure, and can effectively solve the problems of low efficiency and relatively poor assembly consistency in the air valve spring mounting process.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery, and in particular relates to a tool for pressing a valve spring. Background Art

[0002] The valve spring is one of the important components in the engine. Its main function is to control the opening and closing time and frequency of the valve, thereby ensuring the normal operation of the engine.

[0003] Figure 1 The present invention provides a structural diagram of a valve spring of a certain type of engine. During assembly, the valve spring 2 needs to be installed on the valve guide rod 1, and then the valve spring and valve spring seat need to be compressed, and then the valve flap is installed. In the field of internal combustion engine assembly, valve springs are usually difficult to install, and the consistency and reliability of assembly cannot be guaranteed. In the process of repeated disassembly and assembly of the cylinder head valve spring, the valve is easily scratched, which in turn affects the assembly quality. Utility Model Content

[0004] In order to improve the assembly quality and efficiency of valve springs, the utility model aims to provide a press-fit valve spring tool.

[0005] The utility model adopts the following technical solutions to complete its practical new tasks:

[0006] A press-fit valve spring tool, the press-fit valve spring tool is provided with a vertical rod, the lower end of the vertical rod is fixed with a support for fixing on a platform; the upper end of the vertical rod is hinged with a lever; the lever has a first horizontal section, an inclined section, and a second horizontal section connected to the tail of the inclined section, which are arranged perpendicular to the vertical rod; a press-fit valve spring assembly is hinged on the first horizontal section of the lever; the press-fit valve spring assembly has two brackets; the upper ends of the two brackets are connected as a whole by a pin with a hole; a press-fit spring washer for press-fitting on one end of a valve guide rod is provided at the lower end between the two brackets; the center of the press-fit spring washer has a stepped through hole, and the inner diameter of the stepped through hole is larger than the diameter of the valve guide rod and smaller than the outer diameter of the valve spring sleeved on the valve guide rod; the press-fit valve spring assembly moves downward under the action of the lever, and the valve spring sleeved on the valve guide rod is compressed by the press-fit spring washer.

[0007] The press-fit spring washer is connected to the bracket by welding.

[0008] The bracket is a structure that can rotate relative to the lever.

[0009] The utility model provides a valve spring press-fitting tool, which uses a rotatable lever to press the valve spring to a required position by using the downward force of the lever structure; the rotatable lever is locked by using a national standard pin shaft with a hole and a split pin to prevent movement to both sides; compared with the traditional press-fitting method, the advantages of the tool are:

[0010] 1. Accurate positioning and good assembly consistency; since the press-fit spring washer is designed according to the gas valve spring and the gas valve, accurate positioning is ensured during the press-fitting process, ensuring the assembly quality.

[0011] 2. Simple structure, strong versatility, interchangeability and low production cost; since the holed pin shaft, cotter pin and other parts of the tool are selected according to national standards, and the press-fit spring washers can be designed according to the springs and valves of different models, the tool has the characteristics of simple structure, strong versatility, interchangeability and low production cost.

[0012] 3. Improved assembly quality; compared with the traditional press-fit method, the process of installing the front shaft seal using this tool is more uniform, and the assembly consistency and assembly quality are better.

[0013] The press-fitting gas valve spring tool has a simple and light structure and can effectively solve the problems of low efficiency and relatively poor assembly consistency during the installation of the gas valve spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the valve spring structure of a certain type of engine.

[0015] Figure 2 It is a structural schematic diagram of the utility model.

[0016] Figure 3 for Figure 2 AA section view.

[0017] Figure 4 Schematic diagram of press-fit valve spring.

[0018] Figure 5 This is a schematic diagram of the tool stand assembly.

[0019] Figure 6 This is the assembly diagram of the tool stand

[0020] Figure 7 This is a schematic diagram of the press-fit spring washer bracket of this tool.

[0021] Figure 8 This is a schematic diagram of the washer of this tool.

[0022] Fig. 9 This is a schematic diagram of the lever of this tool.

[0023] Fig.10It is a schematic diagram of the bracket in the press-fit spring washer of this tool.

[0024] In the figure: 1. valve, 2. valve spring, 3. valve spring seat, 4. valve flap, 5. cotter pin, 6. press-fit washer, 7. lever, 8. bracket, 9. vertical rod, 10. support, 11. pin shaft with hole, 12. washer. DETAILED DESCRIPTION

[0025] In terms of working methods, the specific steps are as follows:

[0026] like Figure 2 , Figure 3 As shown, and refer to Figure 1-Figure 10 A press-fit valve spring tool, the press-fit valve spring tool is provided with a vertical rod 9, the vertical rod 1 is mainly used to lift the press-fit valve spring tool to an appropriate height to ensure the active stroke of the press-fit spring; the lower end of the vertical rod 9 is fixed with a support 10 for fixing on the platform; the support is mainly used to fix the tool on the platform, is the base of the entire press-fit tool, and is connected to the vertical rod 9 for fixing; the upper end of the vertical rod 9 is hinged with a lever 7; the lever 7 has a first horizontal section, an inclined section, and a second horizontal section connected to the tail of the inclined section, which are arranged perpendicular to the vertical rod 9; the first horizontal section of the lever is hinged with a press-fit valve Spring assembly; the press-fit valve spring assembly has two brackets 8; the upper ends of the two brackets 8 are connected as a whole through a pin shaft 11 with a hole; a press-fit spring washer 6 for press-fitting on one end of the valve guide rod is provided at the lower end between the two brackets 8; the press-fit spring washer is welded and connected to the bracket; the center of the press-fit spring washer 6 has a stepped through hole, and the inner diameter of the stepped through hole is larger than the diameter of the valve guide rod and smaller than the outer diameter of the valve spring sleeved on the valve guide rod; the press-fit valve spring assembly moves downward under the action of a lever, and the valve spring 2 sleeved on the valve guide rod is compressed through the press-fit spring washer.

[0027] The pin shaft with hole 3, washer 4 and cotter pin 5 are mainly used to connect the vertical pole 1 with the lever 7, and the lever 7 with the bracket 8, so as to ensure that the vertical pole and the lever, and the lever and the bracket can rotate flexibly after the connection.

[0028] When in use, place the air valve spring to be installed in a fixed position, move the tool, and ensure that the press-fit spring washer in the tool matches the air valve spring correctly; lift the lever and press downward, use the downward pressure of the lever to transfer the downward pressure to the air valve spring through the press-fit spring washer, the air valve spring is compressed to the predetermined position, and other components can be installed.

[0029] Because the press-fit spring washer cooperates with the lever through the pin shaft with a hole, the washer, the split pin, and the two can rotate. Therefore, springs of different specifications and sizes can be press-fitted by changing the position of the hole on the lever and the size of the press-fit spring washer. It has the characteristics of strong versatility and easy and simple manufacturing.

Claims

1. A tool for pressing a valve spring, characterized in that: The press-fit valve spring tool is provided with a vertical pole, the lower end of which is fixed with a support for fixing on a platform; the upper end of the vertical pole is hinged with a lever; the lever has a first horizontal section, an inclined section, and a second horizontal section connected to the tail of the inclined section, which are arranged perpendicular to the vertical pole; a press-fit valve spring assembly is hinged on the first horizontal section of the lever; the press-fit valve spring assembly has two brackets; the upper ends of the two brackets are connected as a whole by a pin with a hole; a press-fit spring washer for press-fitting on one end of the valve guide rod is provided at the lower end between the two brackets; the press-fit spring washer has a stepped through hole in the center, and the inner diameter of the stepped through hole is larger than the diameter of the valve guide rod and smaller than the outer diameter of the valve spring sleeved on the valve guide rod; the press-fit valve spring assembly moves downward under the action of the lever, and the valve spring sleeved on the valve guide rod is compressed by the press-fit spring washer.

2. A valve spring press tool as claimed in claim 1, characterized in that: The press-fit spring washer is connected to the bracket by welding.

3. A valve spring press tool as claimed in claim 1, characterized in that: The bracket is a structure that can rotate relative to the lever.

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