Fuel pump impeller dismounting device

Abstract

The utility model belongs to the technical field of tool parts, and particularly relates to a fuel pump impeller dismounting device which comprises an ejector rod, a pull claw, a nut and a sunk screw, the ejector rod is in threaded fit with the nut, and the pull claw is fixed on the nut through the sunk screw. The dismounting method of the fuel pump impeller assembly is optimized, the semicircular protrusions on the lower portions of the inner walls of the pull claws are buckled with the circumferential grooves of the impeller, the conical head at the bottom of the ejector rod is inserted into the lining hole in the nut at the tail of the motor, a lining at the tail of the impeller is prevented from being damaged, the ejector rod is rotated, and dismounting is convenient. And the impeller assembly is stably and smoothly pulled out from the tail part of the motor, so that the problem that adjacent parts are extremely easy to damage when the fuel pump impeller is disassembled is solved, and the disassembly efficiency and the disassembly quality of the fuel pump impeller are improved.

Description

Technical Field

[0001] This utility model belongs to the field of tooling components technology, specifically relating to a fuel pump impeller disassembly device. Background Technology

[0002] The fuel pump consists of a drive assembly, impeller, piston cup, and end cap assembly. Its main function is to convert electrical energy into hydraulic energy to provide high-pressure fuel to the engine. A bushing is embedded in the fastening nut at the bottom of the fuel pump impeller. Conventional disassembly methods involve manually removing it with a flathead screwdriver. However, this is difficult because the impeller is hard to grip, the operating space is limited, and the relative positions of the impeller and the bushing at the motor's tail are not visible during disassembly. This method can cause scratches and damage to the impeller, damage to the bushing at the motor's tail that mates with the impeller, and even deformation of the carbon brush holder inside the motor. Furthermore, this method results in low disassembly quality and efficiency. Therefore, to avoid product damage while ensuring disassembly quality and efficiency, a dedicated fuel pump impeller disassembly device needs to be designed. Utility Model Content

[0003] The purpose of this invention is to address the problems of impellers being difficult to clamp, conventional disassembly easily damaging other parts, and low disassembly quality and efficiency. This invention provides a fuel pump impeller disassembly device that improves the disassembly efficiency and quality of the impeller and avoids damage to product parts during the disassembly process.

[0004] The present invention provides a fuel pump impeller disassembly device, comprising a pull claw, a push rod, a nut, and a countersunk screw; the push rod and the nut are threaded together, and the pull claw is fixed to the nut by the countersunk screw.

[0005] Furthermore, the tail of the push rod is conical and is inserted into the inner hole of the bushing at the tail of the motor to avoid damage to the bushing during disassembly; the top of the push rod is a rotating handle, and the middle of the push rod is provided with external threads.

[0006] Furthermore, the pull claws are of a split structure, symmetrical left and right. Each symmetrical structure is fixed to the nut by a countersunk screw. The upper end of the pull claw has a countersunk hole for fixing with the nut, increasing the flexibility of pull claw installation. The bottom of the inner wall of the pull claw has a semi-circular annular protrusion, which mates with the circumferential groove on the top of the impeller, preventing scratches on the outer side of the impeller and the bushing at the tail of the motor. After the protrusion of the pull claw is snapped into the circumferential groove on the top of the impeller, the operator can separate the symmetrical pull claws and check the fit between the pull claw protrusion and the impeller groove in the gap of the pull claw overlap throughout the operation of the device.

[0007] The beneficial effects of this utility model are as follows: The disassembly method of the fuel pump impeller assembly is optimized. The semi-circular annular protrusion on the lower part of the inner wall of the pull claw engages with the circumferential groove of the impeller. The conical head at the bottom of the push rod is inserted into the bushing hole at the tail of the motor, avoiding damage to the bushing at the tail of the impeller. By rotating the push rod, the impeller assembly is smoothly and steadily pulled out from the tail of the motor. This solves the problem of easily damaging adjacent parts when disassembling the fuel pump impeller, saves replacement costs, and improves the disassembly efficiency and quality of the fuel pump impeller. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of the fuel pump impeller disassembly device of this utility model;

[0009] Figure 2 This is a partial schematic diagram of the fuel pump impeller;

[0010] Figure 3 This is a partial cross-sectional schematic diagram of the pull claw.

[0011] The labels in the attached diagram are as follows: 1-pull claw, 2-push rod, 3-nut, 4-countersunk screw. Detailed Implementation

[0012] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0013] like Figure 1 As shown, a fuel pump impeller disassembly device includes a pull claw 1, a push rod 2, a nut 3, and a countersunk screw 4; the push rod 2 and the nut 3 are threaded together, and the pull claw 1 is fixed to the nut 3 by the countersunk screw 4; the tail of the push rod is conical, the top of the push rod is a rotating handle, and the middle of the push rod is provided with an external thread; the pull claw is a split structure, symmetrical from left to right, and the upper end of the pull claw is provided with a countersunk hole; the bottom of the inner wall of the pull claw is provided with a semi-circular annular protrusion, which cooperates with the circumferential groove on the top of the impeller.

[0014] like Figure 2 As shown in the above embodiment, the impeller 21 is fixed by the fastening nut 22 and the bushing 23.

[0015] In the above embodiment, the semi-circular annular protrusion at the bottom of the inner wall of the pull claw is pre-fitted into the circumferential groove of the fuel pump impeller. The conical head at the bottom of the push rod 2 is pre-placed in the bushing 23 hole at the tail of the motor. The rotating handle of the push rod is rotated clockwise. The push rod moves downward with the thread and applies a downward force to the bushing 23. At the same time, the bushing 23 reacts with an upward force on the impeller disassembly device. At this time, the pull claw tightly holds the impeller 21. As the push rod 2 continues to move downward, the pull claw 1 will drive the impeller 21 to smoothly disengage from the tail of the motor.

Claims

1. A fuel pump impeller disassembly device, characterized in that: It includes a pull claw (1), a push rod (2), a nut (3), and a countersunk screw (4); the push rod (2) and the nut (3) are threaded together, and the pull claw (1) is fixed to the nut (3) by the countersunk screw (4); the pull claw is a split structure, symmetrical on the left and right, and the upper end of the pull claw is provided with a countersunk hole; the bottom of the inner wall of the pull claw is provided with a semi-circular protrusion, and the protrusion is engaged with the circumferential groove on the top of the impeller.

2. The fuel pump impeller disassembly device according to claim 1, characterized in that: The tail of the push rod is conical, the top of the push rod is a rotating handle, and the middle of the push rod is provided with external threads.

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