Adjustable hole shrinkage device

The utility model relates to an adjustable hole shrinkage device which comprises a shell, a middle support, a first hole shrinkage plate and a second hole shrinkage plate. The middle support is arranged in the shell. The first hole shrinkage plate and the second hole shrinkage plate are located on t...

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Bibliographic Details
Main Authors LIU XUNPING, GU MINGKAI
Format Patent
LanguageEnglish
Published 25.03.2015
Subjects
BLASTING
COMBUSTION APPARATUS
COMBUSTION PROCESSES
FEEDING FUEL TO COMBUSTION APPARATUS
HEATING
LIGHTING
MECHANICAL ENGINEERING
WEAPONS
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Summary:The utility model relates to an adjustable hole shrinkage device which comprises a shell, a middle support, a first hole shrinkage plate and a second hole shrinkage plate. The middle support is arranged in the shell. The first hole shrinkage plate and the second hole shrinkage plate are located on the middle support and are in sliding connection with the middle support. The adjustable hole shrinkage device further comprises a driving mechanism. The driving mechanism comprises a front seat assembly, a rear seat assembly, an adjusting lead screw, a first driving nut, a second driving nut and a hand wheel. The adjustable hole shrinkage device further comprises an indication assembly and a limiting mechanism. The adjustable hole shrinkage device is simple in structure and good in use safety.
Bibliography:Application Number: CN20142666498U