DE461265C - Air motor for conveyor slide drive - Google Patents

Description

Pneumatic motor for conveyor chute drive. In the known air motors for the drive of conveyor chutes, in which the from the control to the cylinder leading channel opens at the end of the cylinder, the disadvantage is that the returning piston when the machine is stopped or when the machine is overloaded or if the air pressure is too weak, it hits the cylinder cover and destroys it can cause. If the channel in the cylinder wall is at a certain distance from the Lid opens, although this arises when the piston overflows this channel Air buffer. But it can happen here that the motor hits the heavy slide cannot lift because the piston blocks the compressed air supply in the end position.

According to the invention, the cylinder with the control housing is through at least two channels connected, one of which to the cylinder jacket and the other leads to the face of the cylinder. The latter channel becomes useful Equipped with a non-return valve near the cylinder or dimensioned so that that on the one hand there is sufficient compression in the cylinder, on the other hand also allows sufficient inflow.

In such an engine, when it overflows, it forms into the cylinder jacket leading duct an effective compressed air cushion. Nevertheless, at each end position of the piston, compressed air flows into the cylinder and acts as a driving force on the piston, provided there is no higher pressure in the cylinder than in the line. The voltage of the compressed air cushion created in the cylinder in front of the piston adapts to each other the load. The piston will therefore hit under all circumstances on the lid, but also prevents the chute from being lifted again the enclosed compressed air, which is tensioned above the operating pressure, is supported. With care of the motor and the chute, the operation is improved as a result of good buffer formation and increases the delivery rate.

In the drawing, an embodiment of the device is shown. It shows Fig. I a longitudinal section, Fig. Z a horizontal section through the upper one Feed channel.

The control housing a, for example the housing of a piston valve, is connected to the working cylinder d by two channels b and c. Channel b leads to the end face h of the cylinder and contains a check valve e. The channel c opens at a certain distance from the end face h in the cylinder jacket f.

When the piston g returns and overflows the channel c. will be ahead the end wall h formed an effective air cushion, since the check valve e then closes. On the other hand, compressed air can flow through the channel b behind the piston g kick before the latter has released channel c again during forward gear, provided that the compressive stress prevailing in the closed part of the cylinder is the pressure the line no longer exceeds.

The check valve can be used to create a compressed air cushion Arrange harmless bypass channel that controls the setting of the piston in the end position when setting up the machine.

Claims (2)

PATr, N TANSPRÜCHR i. Compressed air motor for conveyor chute drive, characterized in that the control housing (a) is connected to the cylinder (d) by two parallel channels for the compressed air inlet, one of which channel (c) into the cylinder at a certain distance from the end face (h) (d) opens, while the second channel (b) leads through the cylinder cover to the end face (h) of the cylinder (d) . 2. Compressed air motor according to claim i, characterized in that from the two channels (b, c), which lead from the control housing to the cylinder, the channel (b) opening at the end face is a check valve in a manner known per se (e) contains.