Device for pulling out cylinder head fuel injector sleeve

Abstract

The invention relates to a device for pulling out a cylinder head fuel injector sleeve. The device is characterized by mainly comprising a threaded rod, one end of the threaded rod is a threaded end and the other end of the threaded rod is of a taper structure; an expanding sleeve is sleeved on an upper part of the taper end of the threaded rod; a spacer sleeve is sleeved on the threaded rod at the upper end of the expanding sleeve; the spacer sleeve can freely slide on the threaded rod; a lock nut is arranged on the threaded rod above the separating sleeve; and two lock nuts are arranged at the threaded end part of the threaded rod. In the invention, an expanding type principle is adopted and is implemented in such a ways that: by adjusting the lock nuts, the spacer sleeve tightly presses the expanding sleeve, an external surface of the expanding sleeve tightly presses an inner wall of the fuel injector sleeve, then a certain friction force exists between the expanding sleeve and the fuel injector sleeve; and after the expanding sleeve tightly presses the fuel injector sleeve, the device provided by the invention is pulled out so as to pull out the fuel injector sleeve by depending on the friction force between the expanding sleeve and the fuel injector sleeve, the lock nuts are unlocked after the fuel injector sleeve is pulled out, and the dismounting work can be completed just by dismounting the fuel injector sleeve. Thus, the device provided by the invention has a simple structure, and is convenient to use, the technology for maintaining an O-shaped ring of a cylinder head is simplified, the time for maintenance work is shortened, meanwhile, the labor intensity of operators is also lowered.

Description

technical field [0001] The invention belongs to the field of engine maintenance tooling, in particular to a pull-out device for disassembling an engine cylinder head fuel injector sleeve. Background technique [0002] When designing the cylinder head of a diesel engine, it is a common design to assemble the injector mounting sleeve in the cylinder head assembly for direct fuel injection technology. Usually, the O-ring is used to isolate the coolant and diesel in the cylinder head. For the detailed structure, see Figure 1 . During the use of the engine, if the O-ring fails, it will cause the coolant to mix with the diesel, and the consequences of the failure are very serious. A new O-ring needs to be replaced during fault maintenance. First, unscrew the injector sleeve thread. If the engine cylinder head is not removed, it is difficult to remove the injector sleeve, but if the cylinder head is removed, the The maintenance workload will be greatly increased. SUMMARY OF TH...

AI Technical Summary

Problems solved by technology

During the use of the engine, if the O-ring fails, it will cause the coolant to mix with the diesel, and the consequences of the failure are very serious

It is necessary to replace a new O-ring during fault maintenance. First, unscrew the thread of the fuel injector sleeve. It is difficult to remove the fuel injector sleeve without removing the engine cylinder head, but if the cylinder head is removed, Maintenance workload will be greatly increased

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