SU92047A1 - Device for automatically lifting the upper feed rollers of the sawmill frame using the parcel mechanism - Google Patents

Description

The lifting of the rollers of the saw frames can be carried out using pneumatic, hydraulic or electric actuators. Also known are prieosoblezi for the upper leading rollers of a forest machine with a coupling coupling, which is connected to the feed shaft. However, these methods require the introduction of complex and expensive mechanisms into the design of sawmill frames, which is impractical and in many cases impossible.

The proposed device for the automatic lifting of the upper feed rollers of the sawmill-yu frame differs from the known ones in that it uses a cable fixed at one end to the frame of the logging frame. and to another, an asterisk, the rotation of which is transmitted from the upper roller through a clutch. The clutch and sprockets are mounted on the intermediate drive shaft of the drum.

FIG. Figures 1 and 2 schematically depict a device, in which the clutches of the axle and the axis of the upper roller, in two projections; in fig. 3 and 4 is a variant of the device, in which the clutch and sprocket are mounted on the intermediate shaft of the drive of the roller, in two projections.

The punching device consists of a cable 1 (Figs. 1 and 2) fixed at one end to the stand 2 of the forest log, and the other end to an asterisk 3, which rotates from the upper drum 4 through the clutch 5. The clutch is of the friction or cam type moreover, its leading part is connected with the roller and rotates with it, and the driven part of the coupling is fastened with an asterisk. and rotates on the axis.

The clutch 5 is made by turning the lever 6, or by the cable 7 from the workman’s cart, or from the stop mounted in front of the drum, which is turned when the log is pushed. When nr. 92047-2 is the cable 7, the lever 6 rotates, the clutch 5 engages and its sprocket 3 sprockets with it rotates and 1 locks the chain that is used to lift the drum. When the cable 7 is lowered, the clutch disengages under the action of the spring 8 and the drum is lowered down.

In the event of a delay in disengaging the clutch 5 or a failure of the spring 8, a stop 9 is installed on the frame frame, which, with the uppermost position of the drum, presses the lever 6 and the clutch disengages.

In the second version of the device (Figs. 3 and 4), the clutch 5 (Figs. 3 and 4) is mounted on the shaft 10 of the upper roller drive, the leading part of the clutch being rigidly fixed on the shaft and the follower turning on the cement. The driven part of the coupling is connected with an asterisk 11, on which the end of the chain is fixed. The other end of the chain, thrown over the block, is attached to the drum bracket.

Coupling the clutch 5 is made using the lever 12 controlled by the cable 13, thrown over the block 14.

When the intermediate shaft rotates, the chain 1o is wound on the sprocket 11, thanks to which the drum bracket, and together with it the drum, are raised up.

The clutch disengages and the lowering of the drum occurs when the cable 13 is released under the action of the spring 16. The maximum lifting of the drum is limited by the stop 17.

Subject invention

Claims (2)

1. A device for automatically lifting the upper feed rollers of the sawing frame using a parcel mechanism, characterized in that it uses a chain or cable attached at one end to the stand of the forest building and the other to the sprocket, which receives rotation from the upper drum through the clutch. 2. The configuration form according to claim 1, wherein the clutch and the sprocket are mounted on the intermediate drive shaft of the roller, and the chain or cable is attached at one end to the back of the roller and the other to the sprocket. No. 92047 ; t j - four / j I v i K 1/7 4i ./ -D IP  TGCH u -, / 6