Title:
Device for loosening or screwing tight the fixing bolts of a wheel of a motor vehicle, with direct coupling to the wheel.
A Device for loosening/screwing tight the fixing bolts of a wheel of a vehicle, which is directly coupled to the wheel, comprising a housing in the form of a parallelepiped, a socket wrench and a sleeve fixed at the end of an adjustable arm. Here, the socket wrench engages a fixing bolt of the wheel to be screwed, the sleeve guaranteeing the stability of the housing of the device during the loosening or tightening of the above mentioned bolt, by engaging another fixing bolt of the wheel. The housing contains a reduction gear assembly letting to loosen tighten the bolt, by rotating a crank with minimal effort.
In earlier instruments, comprise a reduction gear, an actuating shaft connected to a crank, and an output shaft for engaging the head of the bolt to be screwed using a socket wrench.The tool must be supported to ground and the length of the arm must be adjustable, if the motor vehicle has already been lifted.
In order to remove a wheel, the device is put near the tire rim, engaging the socket wrench with the head of the bolt to be screwed, and at the same time, the bush is plugged into another fixing bolt which has already been loosened subsequently, after the length adjustment of that part of the arm 4, which projects out of the upper part of the device. The crank will be now rotated, in order to loosen or tighten the bolt with less effort, due to the elevated reduction ratio of the reduction gear assembly.
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