CN107855988A - Block special electric-controlled fuel injector tight cap of oil nozzle Special ejector - Google Patents

Abstract

Carter's special remover for oil nozzle tight cap of electric control injector is a mechanical maintenance tool; on the outside of the sleeve-type positioning and dismantling main body, the installation and adjustment sleeve can be axially moved by threading, and on the outside of the adjustment sleeve, it is fixed by fastening screws Inner curved surface-shaped circular sleeve, four locking pins can be inserted radially on the sleeve-type positioning and dismounting main body, and a pressure spring is set on the locking pin, and the outer end surface of the locking pin is connected to the inner surface of the inner curved surface-shaped circular sleeve. The curved surface is in contact fit; the structure of this device is simple, the manufacturing cost is low, the operation is simple and convenient, the disassembly efficiency is high, there is no damage to the oil nozzle cap, and the application range is wide. It can disassemble and assemble various types of Carter fuel injector oil nozzle caps .

Description

Special remover for Carter electronically controlled fuel injector nozzle tight cap

technical field

The invention belongs to a mechanical maintenance tool, and mainly relates to a special remover for the oil nozzle tight cap of a carter electric control fuel injector.

Background technique

With the upgrading and improvement of my country's diesel engine emission regulations, domestic diesel engines have adopted electronically controlled fuel injection technology to meet the requirements. Among them, Carter's HEUI medium-pressure common rail system is an important technical route. At present, there is no domestic manufacturer producing HEUI medium-pressure common rail injectors. Domestic maintenance is all imported diesel engines, and the installed machines are all imported Carter HEUI systems. The disassembly and decomposition of Carter electronically controlled injectors requires special fixtures. The structure is complex and the manufacturing cost is high. The difficulty in disassembling the Carter injector lies in the tight cap of the oil nozzle. Due to its cylindrical shape, it cannot be removed with normal sleeves. At present, the domestic maintenance market uses simple plate clamping tools or pipe wrench to clamp the Carter fuel injectors. The axial and radial positioning is unreliable. Such tools can easily cause deformation or even damage to the tight caps of the nozzles.

Contents of the invention

The purpose of the invention is to solve the problems in the above-mentioned prior art and combine the actual needs of the maintenance market in my country to develop and design a special remover for the oil nozzle tight cap of Carter’s electronically controlled fuel injector, which achieves simple structure, low cost, and simple and convenient use. , To avoid damage to the tight cap of the oil nozzle.

The purpose of the present invention is achieved in this way: on the outside of the sleeve-type positioning and dismounting main body, an axially movable installation adjustment sleeve is fitted through threads, and an inner curved surface-shaped circular sleeve is fixed on the outside of the adjustment sleeve by fastening screws Cylinder, on the sleeve-type positioning and dismounting main body, four locking pins can be mated and installed radially. Spring, one end of the pressure spring is in contact with the sleeve-type positioning and dismounting main body, the other end of the pressure spring is axially positioned on the locking pin, and the outer end surface of the locking pin is in the shape of the inner curved surface of the inner curved circular sleeve. The contact fit constitutes the special remover for the oil nozzle tight cap of the Carter electronically controlled fuel injector.

The invention is a special tool for removing or installing the oil nozzle tight cap of Carter electronically controlled fuel injector, which has the advantages of simple structure, low manufacturing cost, simple and convenient operation, reliable disassembly and assembly, high efficiency, and no damage to the oil nozzle tight cap , Wide application range, can disassemble and assemble the oil nozzle tight caps of various types of Carter electronically controlled fuel injectors.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the special remover for the oil nozzle tight cap of Carter's electronically controlled fuel injector;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is a sectional view of A-A in Fig. 1 .

Description of part number in the figure:

1. Sleeve type positioning and dismantling main body, 2. Adjusting sleeve, 3. Fastening screw, 4. Locking pin, 5. Pressure spring, 6. Inner curved sleeve, 7. Carter fuel injector nozzle tight cap.

Detailed ways

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. A special remover for the oil nozzle tight cap of Carter electronically controlled fuel injector, on the outside of the sleeve-type positioning and dismantling main body 1, the axially movable installation adjustment sleeve 2 is fitted through threads, and on the outside of the adjustment sleeve 2, it is fastened The screw 3 is fixed on the inner curved surface-shaped circular sleeve 6, and four locking pins 4 are radially movable on the sleeve-type positioning and dismounting main body 1, and the four locking pins 4 are located on the curved surface-shaped circular sleeve. In the cylinder cavity of the cylinder 6, a pressure spring 5 is set on the locking pin 4, one end of the pressure spring 5 is in contact with the sleeve type positioning and dismounting main body 1, and the other end of the pressure spring 5 is axially on the locking pin 4 Positioning, the outer end surface of the locking pin 4 is in contact with the inner curved surface of the inner curved circular sleeve 6 .

When disassembling the tight cap of the oil nozzle of the Carter electronically controlled fuel injector, the end of the tight cap 7 of the oil nozzle of the Carter fuel injector is arranged upward, and the whole of the Carter fuel injector is reliably fixed, and the adjustment sleeve 2 is rotated on the main body 1 of the sleeve type positioning and disassembly , and drive the inner curved surface-shaped circular sleeve 6 to move downward relative to the sleeve-type positioning and dismounting main body 1, under the thrust of the pressure spring 5, when the inner end of the locking pin 4 is retracted to the sleeve-type positioning and dismounting main body 1 after being inserted into the socket, fit the special remover on the outside of the oil nozzle tight cap 7 of the Carter fuel injector for axial and radial positioning, and then rotate the adjusting sleeve 2 on the sleeve-type positioning and removal main body 1 to drive The inner surface-shaped circular sleeve 6 moves upward relative to the sleeve-type positioning and dismounting main body 1. Under the thrust of the inner curved surface of the inner curved surface-shaped circular sleeve 6, the locking pin 4 moves radially, and the inner end part of the inner surface is removed from the sleeve. Synchronized with this, at the same time, the sleeve-type positioning and dismantling body 1 is adjusted by circumferential rotation until the locking pin 4 is inserted into the corresponding hole of the oil nozzle cap 7 of the Carter injector. Tighten the adjusting sleeve 2, use a wrench tool to rotate the special remover, and under the action of the locking pin 4, unscrew and remove the oil nozzle tight cap 7 of the Carter injector from the Carter injector to complete the work. During assembly, the steps are the same as disassembly, except that the rotation direction is opposite when tightening the oil nozzle tight cap 7 of the Carter fuel injector.

Claims (1)

1. one kind blocks special electric-controlled fuel injector tight cap of oil nozzle Special ejector, it is characterised in that：In telescopic positioning and dismounting main body (1) the installation and adjustment set (2) being axially movable is coordinated by screw thread on outside, passes through fastening on the adjusting set (2) outside Screw (3) is fixedly mounted with negative camber shape round buss (6), in the telescopic positioning and inserting radially movable in dismounting main body (1) Four locking pins (4) of installation, four locking pins (4) are located in curved round buss (6) barrel chamber, in the stop pin Follow closely and compression spring (5) is set with (4), one end of the compression spring (5) contacts with telescopic positioning with dismounting main body (1) matches somebody with somebody Close, the other end of compression spring (5) axially position on locking pin (4), the outer face of the locking pin (4) and negative camber The negative camber of shape round buss (6) is in be engaged.