SU144384A1 - The mechanism for rolling gear grinding machine - Google Patents

Description

The known rolling mechanisms of a gear grinding machine for grinding cylindrical gears with straight and helical teeth require the use of a large range of replaceable running-chain elements.

The proposed mechanism for rolling a gear grinding machine is made in the form of a rack and pinion single teeth transmission with Novikov engagement. This gear provides the necessary relative movement of the workpiece and tool by installing adjustable guides to move the rail at an appropriate angle. Such a structure does not require any interchangeable elements in the run-in chain.

FIG. 1 shows the kinematic diagram of the proposed rolling mechanism (top view); in fig. 2 - Novikov rack and pinion scheme.

To ensure the validity of the force, which affects the accuracy of the mechanism, the spindle of the ground gear is located vertically. The division mechanism consists of removable separating discs and is not shown in the diagram.

The slider / and the drum 2 are connected by a Novikov rack and pinion gear (see Fig. 2). Grind gear 3 radius of the pitch circle is rigidly connected to the drum. The slide in the running-in mechanism is the driving link. The slideway guide 4 is set at an angle "on a circular scale of a large radius, which ensures installation accuracy at a given gear ratio. From the slide through the cracker 5 get the movement of the slide 6, carrying the grinding wheel. The angle of the guideway a is determined by the formula:

sina --- -. -

№ 144384

where rg is the radius of the pitch circle of the ground gear;

R is the radius of the drum.

The slider / is driven by a screw 7 with 110 bits of an electromagnetic reverse clutch 8 forward and reverse from the electric motor. The screw is a force and does not affect the accuracy of the mechanism. Coupling is reversed by electric switches, which are resetted on guides 4 when setting up the machine, according to the required rolling angle. The reversal losses are small, as the speeds of the slider, drum and sled are small. The screw and the associated clutch discs are reversed, but they have a small moment of inertia, and the lead and reverse drives of the clutch rotate in opposite directions all the time and are not reversed.

The proposed design of the rolling mechanism is simple, has high accuracy, the absence of interchangeable elements of the rolling value, simplified tuning and low losses during reversal.

Subject invention

The rolling mechanism of a gear grinding machine for grinding cylindrical gears with straight and helical teeth, characterized in that, in order to exclude replaceable elements from the rolling chain, it is made in the form of a rack and pinion gearbox with Novikov engagement, which provides the necessary relative movements of the workpiece and tool by setting adjustable guides to move the rail at an appropriate angle.

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