CS197499B1 - Drive of the cutter bar scythe - Google Patents

Abstract

The crank (3) which is mounted on the drive-shaft (2) has a mounting (4) for a pin (5). A bearing housing (6) is fixed on the drive shaft (2) so that it does not turn, and the mounting (4) with the pin (5) is pivot-mounted on the bearing housing (6) by means of an axle (7) and bearings (8). A coupling (9) is fixed onto the pin (5). A universal joint (11) converts the rotary movement from the crank (3) and drive shaft (2) or rocker arm (14) and transmits it to a blade (15). The pin (5) and coupling are joined by a separate bearing (16).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scythe drive for a cutter bar, in particular for a double scythe cutter having a drive shaft arranged transversely to the travel direction and a scythe drive on both sides.

Known drives for mowing the cutter bar operate in the form of a rocking disc or pivot pin. In doing so, the rotational movement of the drive shaft converts from a bent pivot pin arranged on the same shaft by means of a pivot bearing in the tapered bearing to a rotary movement of the fork shaft and from there transmitted to the pivot lever which causes oscillating movement of the scythe.

Since the pivot plate or the pivot shaft is guided at several bearing points, a precise adjustment is required between the pivot pin and the pivot plate and also between the pivot plate and the fork shaft. In this case, the axes of the pivot shaft of the pivot pin and the fork shaft must intersect at one point. In the case of deviations from the common intersection, the fork shaft orbits round, the bearings become more stressed, the pendulum disk heats up and after a relatively short time the drive breaks down. In addition, the high precision of adjustment required due to the numerous storage locations requires considerable care and maintenance.

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The purpose of the invention is to provide a drive for the cutter bar scraper which requires little adjustment and maintenance.

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SUMMARY OF THE INVENTION The object of the present invention is to provide a cutter drive for which cutting and manufacturing tolerances could not cause any reaction forces. in the drive train members.

According to the invention, the drive mechanism for the cutter bar scraps is characterized in that a bearing body is provided at the end of the drive shaft, bearing the pivot of the pivoted crank disk mounted in the bearing. oblique.

According to a further feature of the invention, a resilient connecting plate is provided between the pivotable crank disk and the pivot joint, provided with a bearing knuckle.

According to a further feature of the invention, the joint of the universal joint is connected to the joint pin by an adjustment part for compensating tolerances.

ftišením ^{characterized} by the nál.ezu zmentaje laboriousness pH seHzová ^ and amortized to achieve good building, in particular with a second actuator disposed on the opposite side on the same shaft.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic of a double-sided actuator; FIG. 2 is a schematic of a one-sided ejector drive; FIG. 3 is a sectional view of the crank disk drive; 5 a section through the drive with leaf springs.

The crankshaft disk 3 is formed in such a way that the bearing body 7 is fixed to the drive shaft 2 in a non-rotatable manner, In the bearing body 7, a clamp 4 with a hinge 5 and a further pin 8 is rotatably supported by means of a pin 8 - by means of bearings 9.

* Na ^{- No} EPU 6 JS fastened with ^p Г0 rod. that allows. ^p dip ^and the adjusting member 11 in the adjustment direction of its longitudinal axis. The link 10 causes, by means of a universal joint 12, the transmission and conversion of the rotary movement supplied from the drive shaft 2 to the crankshaft 3 into the oscillating movement of the shaft 13- and the linkage 14 or the rocker arm 15 to the scythe 16.

In order to reduce the relative movement between the crank disk 3 and the pin 8, the pin 8 is connected to the link 10 by means of a separate bearing bush 17. In another construction, a connecting plate 18 is provided on the crank disk 3. The movement in the longitudinal axis of the connector 10 is captured by the connecting plate 18 and the pivotal movement of the pin 6 by the bearing cage 19 arranged in the joint 5.

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Claims (3)

THE INVENTION OF THE INVENTION 1. Cutter bar scraper drive * especially for a double scythe cutterbar * which is provided with a shaft * arranged transversely to the travel direction * and a scraper drive on both sides * characterized in that a bearing housing / 7 is provided at the end of the drive shaft (2) carrying the pivoting crank plate (3) housed in the bearing (9), wherein the articulated joint (5) attached to the pivoting crank plate (3) passes through a further bolt (8) in the joint (10) of the universal joint (12) s by a rectangular shaft (13) of the spindle (14) of the scythe (18). 2 *. Drive according to claim 1, characterized in that a flexible connecting plate (18) * provided with a bearing cage (19) of the joint (5) is provided between the pivotable crank disk (3) and the joint (5) of the pin (6). Drive according to Claims 1 and 2, characterized in that the joint (10) of the universal joint (12) is connected to the pin (6) of the joint (5) by an adjusting part (11) for compensating tolerances.