CS239221B1 - Device for fast change of eccentricity of grinding machine - Google Patents

Abstract

A device for quickly changing the eccentricity of a grinding machine and thus the size of the arm swing, usable in all types of grinding and polishing machines, enabling quick adjustment of any value in a given range starting from zero on the principle of three mutually locking toothed discs, rotatably mounted on a circular base plate I., of which the disc 5 is manually controllable in the vertical direction and, when pressed, moves out of engagement with the locking disc 6 by half the width of the teeth, thus enabling rotation of the main disc 2 with the rod 4 of the eccentrics according to the scale and, immediately, mutual engagement and blocking by the action of the return spring 7, so that the immobilized set of eccentrics rotates only around the main axis, mounted in the machine frame.

Description

(54)

Device for quick change of eccentricity of grinding machine

A device for rapid change of eccentricity of the grinding machine and thus of the arm swinging rate, applicable to all tigers of grinding and polishing machines, enabling a prompt adjustment of any value within a given range starting from zero on the principle of three interlocking toothed discs of which the disc 5 is manually operable "in the vertical direction and, when pressed, protrudes from the locking disc 6 with half the width of the teeth and thus allows rotation of the main disc 2 with the eccentric rod 4 according to the scale and toothing and blocking so that the immobilized eccentric assembly rotates only about the main axis housed in the machine frame.

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BACKGROUND OF THE INVENTION The present invention relates to a device for rapidly changing the eccentricity of grinding and polishing machines, which allows the eccentrics to be readily adjusted and thus the arm of the grinding machine can be swiveled.

Known and predominantly used grinding machines such as Koerger, Elstroj and the like use a conventional method to change the eccentric setting, except for moving the stone with anchored tie rod in the T-slot using a threaded screw at the end provided with a square for key mounting. As the screw is rotated, the change in eccentricity is monitored on a scale mounted on the disc of the excentor, which can be set from zero to within the range of the machine size, for example 0 to 100 mm. This operation is repeated in short chn ntals, especially for finishing and polishing work.

The relatively lengthy adjustment procedure removes the device for rapid change of eccentricity of the grinding machine according to the invention, which consists in that three toothed _and interlocking discs are rotatably mounted on the base ring of eccentric rotatable in the machine frame, of which kUvm Vo- hx »©, provided with a journal and bearing rod, is eccentrically mounted about half of the selected eccentricity with respect to the axis of the base plate and is engaged in engagement with the other two discs, one vertically displaceable and spring-loaded and the other half-toothed.

Eccentricity can be changed quickly and without tools.

In the following, with reference to the accompanying drawings, the invention is described as one of the specific embodiments and the function of the device is described.

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239 221

1 is a schematic top view and FIG. 2 is a side view. The figures show an eccentric with a base ring plate 8, a main toothed disk 2 with a pin 2 ^and a bearing rod 6, a vertically movable disk ^{28 with a} return spring 2, a half-width toothed disk 6 and a line 8.

A main toothed disk 2 and a direct involute toothing are rotatably mounted on a pin of the toothed base plate 6 with a gear for driving predominantly a chain from the motor, and the latter is offset by half the selected eccentricity range relative to the axis of the base plate. if the eccentricity range is 0 to 60 mm. On the disc 2, on the fixed and non-rotatably mounted pin 2, there is a bearing of the rod 4, which by its other end is connected to the swinging arm of the grinding machine. The eccentricity of the pin 2 against the axis of the disc 2 is also 30 mm for the selected example. They are pivotably mounted on the pins in the base plate. the other two toothed discs 6 and 6, wherein the three toothed discs 2, 2, 5 ^are engaged with one another. The disc 6 has half the width of the teeth and the disc 6 can be manually moved vertically just enough to move out of engagement with the disc 6, but remains in engagement with the disc 2. By manually rotating the disc 2 ^Ύ the eccentricity scale indicated on the disc 2 against the line 8 on the base plate 8, thereby setting any value in the range 0 to 60 mm. Upon release of the pressure, the disc 2 automatically reverts to engagement with the return spring 6, thereby immobilizing the three toothed disk complex and forming a unit with a single axis of rotation, which is the axis of the base plate 6 rotatably mounted in the machine frame. This operation takes place very quickly and without tools when the machine is stopped.

Claims (1)

SUBJECT OF THE INVENTION 238 221 A device for rapidly changing the eccentricity of a grinding machine, characterized in that three toothed and interlocking discs (2), (5), (6), are rotatably adhered to the base ring (1) of the exoent rotatable in the machine frame. of which Uamm WfCČ (provided with pin (3) and bearing (4) with bearing) is eccentrically mounted about half of the selected eccentricity range relative to the axis of the base plate (1) and rotates in engagement with the discs / other two ^ (5), (6) ), the disc (5) being vertically displaceable and provided with a return spring (7) _{and the} last disc (6) having half the width of the toothing.