Pressing device for diesel injector

Abstract

The invention discloses a pressing device which comprises a barrel and a positioning part. The barrel is fixed to a diesel injector through an axial retainer ring, one end of the positioning part is fixed to the diesel injector, and the other end of the positioning part is fixed to a body of a diesel. Therefore, down moving and pressing of the diesel injector can be realized by screwing the barrel, the injector cannot rotate along with screwing of the barrel during pressing as the injector is fixed onto the body of the diesel through the positioning part, and positioning during pressing of the injector is realized. Accordingly, rotation of the injector during screwing is avoided, and precision and efficiency in pressing of the injector are improved.

Description

technical field [0001] The invention relates to the technical field of diesel engine auxiliary equipment, in particular to a pressing device for a diesel engine fuel injector. Background technique [0002] The fuel injector is a key part of the diesel engine, and it needs to be fastened by a compression device during installation. [0003] The compression method of the traditional fuel injector is generally the compression method of the briquetting block. This kind of compression method is likely to cause the compression force to be deflected, resulting in a poor seal at the bottom of the fuel injector. Therefore, at present, the compression screw sleeve is mostly used as the The way the injectors tighten. The compression device of the compression nut compression method consists of a compression nut and a steel wire retaining ring. The compression nut is connected with the injector through the steel wire retaining ring. When the compression nut is screwed in downward, the ...

AI Technical Summary

Problems solved by technology

[0004] The compression method of the compression screw sleeve is screwed in and gradually compressed. During the tightening process, the fuel injector will follow the rotation, and the positioning angle of the fuel injector after compression cannot be guaranteed, resulting in the oil return port on the fuel injector. The oil return pipe of the fuel injector is aligned and assembled, and it often needs repeated disassembly and adjustment to get the desired angle, which not only increases the workload of the assembler but also greatly reduces the work efficiency; at the same time, the fuel injector cannot be aligned during the assembly process. For positioning, just turn the oil return port of the fuel injector to a certain amount of advance before tightening, and roughly control the oil return port to reach the expected angle after the fuel injector is tightened. Since the advance is visually measured based on experience, the injection port will be sprayed during each tightening process. The follow-up angle of the oiler is not the same, and the assembly accuracy is low

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