CZ177693A3 - Cutter with counter-rotating cutter bar - Google Patents

Abstract

The counter-rotating mower consists of a set of two mutually opposing meshes (16, 25) mounted on the guide levers (17) and simultaneously mounted on the drive levers (14, 24), the drive levers (14, 24) being rotatably mounted on of the main beam (18) by means of pins (19) which are parallel to the pins of the guide levers (20) and lie in a common plane (21) and the side arms (13) of the drive levers (14, 24) are articulated to the drive rod (10) .

Description

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a mower with a counter-rotating cutter bar, particularly useful as a tool for universal uniaxial tractors. However, it can also be used for two-axis tractors or for single-purpose motor mowers.

BACKGROUND OF THE INVENTION

In mowers with counter-rotating cutter bars of known configurations, the counter-rotating scythes are supported on a system of pivoting levers rotatably mounted on the main bar of the cutter bar and the reciprocating movement of the scythes is ensured by propulsion mechanisms derived from the double crank or double eccentric.

Arrangements are also known in which the reciprocating movement of the scythes is provided by special ducted mechanisms.

A disadvantage of these known arrangements is the high manufacturing demands and considerable dimensions. When used for central-drive mowing, this makes it difficult for grass mowing to run and the cutting mechanism often clogging.

SUMMARY OF THE INVENTION

These disadvantages are partly overcome by the mowing machine with counter-rotating cutter bar according to the invention, wherein one drive lever is articulated on each axis of the guide levers and both drive levers are rotatably mounted on the main bar of the cutter bar by pins parallel to the guide levers. the guide levers also lie in a common plane.

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The small dimensions and low manufacturing / production are ensured in particular by the lateral arms of both drive levers being articulated on the drive rod.

High-quality stubble even when working in rugged terrain is ensured by the fact that in the plane of the drive pulley there is arranged a transverse copy pin, which is located in the frame of the mower and at the same time

the transverse copy pin is mounted in the connection piece and the transverse copy pin axis is perpendicular to the handle.

Overview of the drawings

An example of an embodiment of a mowing machine with a counter-rotating cutter bar according to the invention is shown in Fig. 1, where the device is shown in longitudinal section. Giant. 2 shows a plan view of a mower with counter-rotating cutter bar according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

The mower with counter-rotating cutter bar shown in FIGS. 1 and 2 is connected to the universal uniaxial or biaxial small-tractor by means of the connecting piece 1 and the transverse copying pin 2. The frame J by means of bearings rotatably fifth crank pulley £ 7th and 26th counterbalance means of a crank bearing crank £ 8 is connected to the main connecting rod 9. driving rod 10 .. On the main rod 2 ^e j through a middle articulation bearings 11 the auxiliary linkage 12. The main linkage 9 and the auxiliary linkage 12 of the drive rod 10 are then articulated on the side arms 13 of the drive levers 14, 24, supported by pins 19 on the main beam 18. The main arms 15 of the drive levers 14, 24 are rotatably connected The scythes 16, 25 are simultaneously rotatably connected to the guide levers 17 mounted by means of the guide levers 20 on the main beam 18. The guide levers 20 and the pins 19 lie in a common plane 21.

The operation of the mowing machine with the counter-rotating cutter bar is as follows: From the small-tractor drive pulley 22, the rotary movement is transmitted via the belt 23 to the pulley 7 fixedly connected to the crank 6. · The crankshaft 8 is derived from the crankshaft. 10 converts the reciprocating movement via the drive lever 14 to the scythe 16, and at the same time the auxiliary linkage 12 counteracts the reciprocating reciprocating movement via the opposite lever 24 to the opposite scythe 25. Because the weight of the scythe 16 is approximately the same as The relative movement of both of these scythes 16, 25 is counter-rotating;

- 3 by means of the frame 4, the transverse copy pin 2 and the connecting part 1 for the small tractor 2 ^and also ^{for the} machine operator very low vibrations. The effect of the unbalanced mass of the drive rod LO can be largely counterbalanced by the balancer 26 associated with the crank 6.

Claims (3)

A mower with a counter-rotating cutter bar, with counter-rotating scythes mounted on guide swivel levers, rotatably mounted on a main bar of a mowing bar, characterized in that a drive lever (14) is articulated on a shaft (16); the opposite driving lever (24) and the two driving levers (14, 24) are rotatably mounted on a main beam (18) connected to the frame (4) by means of pins (15) which are parallel to the pins of the guide levers (20) and common plane (21), the length of the main arm (15) of the driving levers (14, 24) is equal to the length of the guide levers (17) and at the same time the side arms (13) of the driving levers (14, 24) are articulated on the driving rod . 2. Mower with counter-rotating cutter bar according to claim 1, characterized in that a crank (6) with a drive pulley (7) or a balancer (26) is mounted in the frame (4) of the mower by means of bearings (5). wherein the crank (6) is rotatably supported by a crankshaft bearing (8) on the main rod (9) of the drive rod (10) and at the same time an auxiliary is connected to the main rod (9) of the drive rod (10) connecting rod / 12 / connecting rod / 10 /. Mower with counter-rotating cutter bar according to Claims 1 and 2, characterized in that in the plane (27) of the drive pulley (7) a transverse copy pin (2) is arranged, which is mounted in the frame (4) of the mower, this transverse copy pin (2) is received in the connecting piece (1) and the transverse copy pin (2) is perpendicular to the handle (6).