SU372764A1 - UESIONAL I - Google Patents

Description

one

The mechanisms for driving two-knife cutting apparatus are known, comprising swinging washers mounted on a single drive shaft and associated with knives that are in antiphase movement. The drive shaft of known mechanisms is usually of small length and is located on one side of the header of the harvester. These mechanisms are unsuitable for driving the cutting apparatuses of wide-cut headers, since the one-sided arrangement of the drive shaft relative to the platform necessitates making obol shears of knives across the full width of the grip. This increases the inertial forces during the operation of the cutting apparatus, and also increases the power consumption of the drive. In addition, in the known drive mechanisms, the movement from the swiveling washers to the knives is usually transmitted by short rods. Due to the insufficient distance between the center of swing of the connecting rod and the point of attachment to the knife, the latter does not make a linear motion, but in some arc, as a result, the gaps in the cutting pairs increase and the cut quality of the plants deteriorates.

In the proposed drive mechanism for spzhrchi inertial forces and improving the quality of the cut, the drive shaft is placed frontally under the platform of the header for its full width with one-side bent ends bearing console mounted swing washers, which are connected by forks with connecting rods attached to the knives and hinged on supports at the top of the side walls of the platform. The connecting rod bearings are mounted on a V-shaped profile x formed by bending the upper part of the side walls of the platform and connected with stiffening ribs fixed to the walls. The specified implementation of the drive mechanism provides the possibility of a synchronous double-sided drive of the knives, each of which has a length approximately equal to half of the cutting width of the header, which minimizes inertial forces. Hinge connecting rods at the top of the side walls

platforms increase their length to the limits that provide almost straight linear movement of knives, which improves the quality of cut plants.

FIG. 1 shows the proposed mechanism

the drive with the cutting apparatus on the header of the harvesting machine, top view; in fig. 2 - the same, side view; in fig. 3 shows a section along L-A in FIG. 2

The drive mechanism of the cutting unit is mounted on a harvester containing a drive shaft 1, which is associated with an intermediate shaft 2 carrying the drive pin 3 and the sprocket 4 of the front auger drive 5. At the opposite end of the pin 5 shaft there is a pin 7 of the drive reel 7. Pulley 3 is engaged in a belt drive 8 with a driven pin 9 of the drive shaft 10, which is located frontally under the header platform 11 and has several supports 12. The drive shaft 10 is made with protruding ends 14 protruding beyond the side walls 13 and carrying a cantilever Swinging shchyaba 15, which are connected with forks 16 shatuny 17. The connecting rods are hinged on supports 18 located in the upper part of the side walls 13. The lower ends of the rods 17 are attached by means of hinges 19 to the mowing knives 20. The supports 18 shatunov 17 are installed on The profile is V-shaped, which is formed by the bending of the side walls 13 and is connected to the stiffening ribs 21 fixed to the walls.

During the operation of the cutting unit, rotation from the drive shaft 1 is transmitted to the intermediate shaft 2 and via a belt drive 8 to the drive shaft 10. The rotational movement of the drive shaft is transformed by swinging tongs 15 and transmitted through forks 16 to tongs 17 hinged to the supports

18 and the mowing knives 20, which, due to the considerable length of the rods, perform an almost linear motion. The drive mechanism provides synchronous anti-phase movement of the mowing knives.

Subject invention

Claims (2)

1. A two-blade cutting unit drive mechanism, preferably for wide-cut headers with a platform and side walls, containing swashplates mounted on a single drive shaft and associated with anti-phase movement knives, characterized in that in order to reduce inertial forces and improving the quality of the cut, the drive shaft is placed frontally under the platform of the header to its full width and is made with one-sidedly bent ends, carrying cantilever swivel washers, which are connected by Lock with rods attached to the blades and scharnirno attached to supports at the top of the side walls of the platform. 2. The drive mechanism according to claim 1, characterized in that the connecting rod bearings are mounted on a V-shaped profile x formed by bending the upper part of the side walls of the platform and connected with stiffeners fixed to the walls. 73 15 s 1 21 IS V h CSTIHL UHF H.JT