A tool for disassembling a fuel pump coupling block

Abstract

This utility model provides a disassembly tool for a fuel pump coupling block, including a fixing block and a screw. The fixing block is fixedly connected to the coupling block by bolts. The fixing block has a protruding helical boss in the middle. The screw includes a threaded section and a tightening part located inside the threaded section. The threaded section is threadedly connected to the helical boss, and the tightening part abuts against the end of the camshaft. During disassembly, one hand supports the screw located outside the helical boss, while the other hand holds the screw and tightens it until the tightening part engages with the camshaft, pushing the coupling block out. This utility model has a simple structure, allows for quick and convenient disassembly, and prevents the coupling block from falling off, avoiding damage caused by a falling coupling block, reducing maintenance costs, eliminating safety hazards for maintenance personnel, and improving maintenance safety.

Description

Technical Field

[0001] This utility model relates to the field of fuel pump technology, and in particular to a tool for disassembling a fuel pump coupling block. Background Technology

[0002] When repairing and maintaining a fuel pump, the first step is to disassemble the fuel pump coupling block. The coupling block and the fuel pump camshaft have a tapered tight fit, requiring auxiliary tools for disassembly. Currently, a puller is typically used for disassembly. During disassembly, the puller's claws engage the outer side of the coupling block, and a wrench is used to rotate the puller's screw to push the coupling block out. This method is slow, and the coupling block easily detaches from the puller during ejection, causing damage and high scrap rates, increasing repair costs and posing a safety risk to repair personnel.

[0003] A puller, also known as a puller, is a commonly used tool in mechanical maintenance. It is mainly used to remove bearings axially from shafts. Utility Model Content

[0004] The present invention aims to provide a tool for disassembling a fuel pump coupling block to overcome the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a disassembly tool for a fuel pump coupling block, including a fixing block and a screw. The fixing block is fixedly connected to the coupling block by bolts. The fixing block has a protruding helical boss in the middle. The screw includes a threaded section and a tightening part located inside the threaded section. The threaded section is threadedly connected to the helical boss, and the tightening part abuts against the end of the camshaft. During disassembly, one hand supports the screw located outside the helical boss, and the other hand holds the screw-tightening tool to tighten the screw until the tightening part of the screw engages with the camshaft to push out the coupling block.

[0006] Furthermore, the tool for disassembling the aforementioned fuel pump coupling block is an automatic screwdriver.

[0007] Furthermore, in the aforementioned fuel pump coupling disassembly tool, the main body of the fixing block is provided with at least two mounting holes, which correspond to the threaded holes on the coupling block. The fixing block is fixedly connected to the coupling block by bolts passing through the mounting holes and connecting the threaded holes.

[0008] Furthermore, in the aforementioned fuel pump coupling disassembly tool, the fixing block is further provided with a positioning platform extending into the coupling block in the middle, and the positioning platform is clearance-fitted with the hole in the middle of the coupling block.

[0009] Furthermore, in the aforementioned fuel pump coupling disassembly tool, an elastic rubber pad is fixed to the side of the fixing block body near the coupling block.

[0010] Furthermore, the aforementioned fuel pump coupling disassembly tool includes a screw rod with a tightening part located outside the threaded section. The tightening part is a hexagonal nut head. The outer diameter of the tightening part is smaller than the outer diameter of the threaded section, and the end face of the tightening part that mates with the camshaft is rounded.

[0011] Furthermore, in the aforementioned fuel pump coupling disassembly tool, the length of the internal thread of the helical boss that mates with the threaded section is not less than two parts of the outer diameter of the threaded section.

[0012] Furthermore, in the aforementioned fuel pump coupling disassembly tool, when the tightening part abuts against the end of the camshaft, the length of the screw protruding from the spiral boss is 100-130mm.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the utility model has a simple structure, is quick and easy to disassemble, and the connecting block will not fall off after disassembly, thus avoiding damage caused by the falling of the connecting block, reducing maintenance costs, eliminating safety hazards for maintenance personnel, and improving maintenance safety. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of the disassembly tool for the fuel pump coupling block of this utility model;

[0016] Figure 2 This is a schematic diagram of the fixing block of the disassembly tool for the fuel pump coupling block of this utility model;

[0017] Figure 3 This is a schematic diagram of the screw of the disassembly tool for the fuel pump coupling block of this utility model;

[0018] Figure 4 This is a disassembly diagram of the disassembly tool for the fuel pump coupling block of this utility model;

[0019] In the diagram: 1. Fixing block; 11. Spiral boss; 12. Mounting hole; 13. Positioning platform; 14. Elastic rubber pad; 2. Screw; 21. Threaded section; 22. Tightening part; 23. Tightening part; 3. Bolt; 4. Coupling block; 5. Camshaft; 6. Pump body. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1

[0022] like Figure 1-4 As shown, a disassembly tool for a fuel pump coupling block is used to disassemble the coupling block 4, separating the coupling block 4 from the camshaft 5 and the pump body 6 of the fuel pump. The tool includes a fixing block 1 and a screw 2. The fixing block 1 is fixedly connected to the coupling block 4 by bolts 3. The fixing block 1 has a protruding helical boss 11 in the middle. The screw 2 includes a threaded section 21 and a tightening part 22 located inside the threaded section 21. The threaded section 21 is threadedly connected to the helical boss 11, and the tightening part 22 abuts against the end of the camshaft 5. During disassembly, one hand supports the screw 2 located outside the helical boss 11, while the other hand holds a screw-tightening tool (not shown) and tightens the screw 2 until the screw tightening part 22 engages with the camshaft 5, pushing the coupling block 4 out.

[0023] In this embodiment, an automatic screwdriver is used as the tightening tool, which can quickly push out the coupling block. After being pushed out, the coupling block 4 is loosened from the camshaft 5, and the coupling block 4 can be easily removed. Since the coupling block 4 is fixedly connected to the fixing block 1, the coupling block 4 will not fall off, avoiding damage caused by the coupling block falling. The coupling block can be reused, reducing maintenance costs and eliminating safety hazards for maintenance personnel, thus improving maintenance safety.

[0024] In the above structure, such as Figure 1-2 As shown, the main body of the fixing block 1 is provided with at least two mounting holes 12, which correspond to the threaded holes on the coupling block 4. The fixing block 1 is fixedly connected to the coupling block 4 by bolts 3 passing through the mounting holes 12 and connecting to the threaded holes. In this embodiment, the coupling block 4 is provided with a plurality of circumferentially evenly arranged threaded holes, and there are two mounting holes, which can ensure a stable connection while quickly installing the fixing block.

[0025] like Figure 1-2 As shown, in order to facilitate the quick positioning and installation of the fixing block 1, the fixing block 1 is also provided with a positioning platform 13 extending into the connecting shaft block 4 in the middle, and the positioning platform 13 is clearance-fitted with the hole in the middle of the connecting shaft block 4.

[0026] In addition, such as Figure 1As shown, an elastic rubber pad 14 is fixed to the side of the main body of the fixing block 1 near the connecting shaft block 4. When the fixing block 1 is connected to the connecting shaft block 4, the side of the main body of the fixing block 1 near the connecting shaft block 4 fits tightly with the connecting shaft block 4. The elastic rubber pad 14 not only ensures that the two are tightly connected, but also reduces damage to the outer surface of the connecting shaft block 4.

[0027] In addition, such as Figure 1 , 3 As shown, the screw 2 also includes a screwing part 23 located outside the threaded section 21. The screwing part 23 is a hexagonal nut head, which is easy to screw with a general-purpose tool. The outer diameter of the tightening part 22 is smaller than the outer diameter of the threaded section 21, and the end face of the tightening part 22 that mates with the camshaft 5 is rounded to avoid damage to the camshaft 5 when it is tightened.

[0028] The length of the internal thread of the helical boss 11 that mates with the threaded section 21 is not less than two parts of the outer diameter of the threaded section 21, ensuring the connection strength between the screw 2 and the fixing block 1. Furthermore, to ensure the strength of the screw 2, the outer surface of the screw 2 is heat-treated to HRC40-45.

[0029] When the tightening part 22 abuts against the end of the camshaft 5, the length of the screw 2 protruding from the spiral boss 11 is 100-130mm. This length not only ensures the stability of the screw 2 during disassembly, but also makes it easy for maintenance personnel to hold and improves the ease of disassembly.

[0030] The working principle of this utility model is as follows: First, the fixing block 1 is installed and fixed on the connecting block 4. Then, the screw 2 is screwed into the spiral boss 11 until the top part 22 of the screw is pressed against the camshaft 5. Then, one hand supports the screw 2 located outside the spiral boss 11, and the other hand holds an automatic screwdriver to turn the screw 2 until the screw 2 pushes out of the connecting block 4, thus completing the removal of the connecting block 4.

[0031] This utility model has a simple structure and is quick and easy to disassemble. Because the disassembly tool is fastened to the connecting block, the connecting block will not fall off after disassembly, thus avoiding damage caused by the connecting block falling off, reducing maintenance costs, eliminating safety hazards for maintenance personnel, and improving maintenance safety.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tool for removing a fuel pump coupling block, characterised in that: The device includes a fixing block and a screw. The fixing block is fixedly connected to the connecting block by bolts. The fixing block has a protruding helical boss in the middle. The screw includes a threaded section and a tightening part located inside the threaded section. The threaded section is threadedly connected to the helical boss, and the tightening part abuts against the end of the camshaft. When removing the device, one hand supports the screw located outside the helical boss, and the other hand holds a screw-tightening tool to tighten the screw until the tightening part of the screw engages with the camshaft to push out the connecting block.

2. The fuel pump boss puller according to claim 1, wherein: The screwdriver is an automatic screwdriver.

3. The fuel pump boss puller of claim 1, wherein: The main body of the fixing block is provided with at least two mounting holes, which are corresponding to the threaded holes on the connecting shaft block. The fixing block is fixedly connected to the connecting shaft block by bolts passing through the mounting holes and connecting the threaded holes.

4. The tool according to claim 1 or 3, wherein: The fixing block is also provided with a positioning platform extending into the connecting shaft block in the middle, and the positioning platform is in clearance fit with the hole in the middle of the connecting shaft block.

5. The disassembly tool for the fuel pump coupling block according to claim 1, characterized in that: An elastic rubber pad is fixed to the side of the fixing block body near the connecting shaft block.

6. The fuel pump boss puller of claim 1 wherein: The screw also includes a screwing part located outside the threaded section. The screwing part is a hexagonal nut head. The outer diameter of the tightening part is smaller than the outer diameter of the threaded section, and the end face of the tightening part that mates with the camshaft is rounded.

7. The fuel pump boss puller of claim 1 wherein: The length of the internal thread of the helical boss that mates with the threaded section is not less than two parts of the outer diameter of the threaded section.

8. The tool according to claim 1 or 7, wherein: When the tightening part abuts against the end of the camshaft, the length of the screw protruding from the helical boss is 100-130mm.

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