FR2572245A1 - DEVICE FOR DRIVING KNIVES FOR A ROPE PRODUCT HARVESTER - Google Patents

Abstract

A. KNIFE DRIVE DEVICE FOR A ROD PRODUCTS HARVESTER. B. DEVICE CHARACTERIZED IN THAT THE MIDDLE ZONE OF A BASIC CHASSIS 2 IS FIXED A KNIFE DRIVE MEANS, WHICH CONSISTS OF TWO HALVES OF BOX 6, 6 JOINED REMOVABLE BETWEEN SHEET PARTS 3, 3 HOUSING A CRANK DISC 11 CONNECTED TO THE MOTOR SHAFT 9 AND ITS CRANKSHAFT 12 FITTED WITH CONNECTING RODS 13, 13 AND BETWEEN THE BEARING EYELETS 21, 21 ARE HOUSED THE ARTICULATION BEARING BUSHINGS 22, 22 ELBOW LEVERS 19, 19 ONE END OF WHICH IS CONNECTED BY BEARINGS 17, 17 TO THE CONNECTING RODS 13, 13 AND BY THE OTHER END TO KNIFE HOLDERS 25 EQUIPPED WITH KNIVES 26. C. THE CONCERNED INVENTION A KNIFE DRIVE DEVICE FOR A ROD PRODUCT HARVESTER.

Description

Knife driving device for a

harvester of stem products. "

The present invention relates to a

  knife driving device for harvesting-

  stem products. The invention relates in more detail to a knife driving device for rod-type harvesters having a drive shaft provided behind the cutting-machine trough, to which are connected by crank pins and rods. of thrust, angled levers provided below the trough of the cutting mechanism and the cutter plates

  on which are fixed the knives.

  Such devices are intended for harvesters of stems products, for cutting mechanisms having different working widths on combines and choppers, self-driving, as well as

on combine harvesters.

  The publication DD-A 206 458 discloses a cutting mechanism driving device for machines having cutting mechanisms of large working width, allowing a narrow construction of the side walls and avoiding sliding traces on the main wall. A motor shaft located behind the rear wall of the trough of the cutting mechanism is connected on both sides to the cranks. Push rods passing over the side walls and directed forward are connected to the ends of the bent levers provided. on both sides below the trough containing the cutting mechanism, by their lateral walls directed outwards. The ends of the bent levers protruding at the front by passages made in the trough containing the cutting mechanism, are connected to the knife-holder plates inside the side walls and are covered on all sides by the devices of application

knives.

  This embodiment certainly avoids the formation of wear marks at the bearing limit as occurs for the drives of conventional cutting mechanisms located outside. But it has the disadvantage that the disposition of the bent levers at the side walls and thrust rods guided outside the side walls, requires a bearing panel extending over the entire width of the motor shaft of the cutting mechanism including the two bearing panels provided on each side and which receive

  crank disks and crank journals.

  In addition, the drive elements provided at the side walls increase the oscillations, which is

translated by a loud noise.

  German Offenlegungsschrift 19 62 701 discloses a cutting mechanism, frontal, intended to be mounted at the front of a tractor or similar vehicle, and which comprises a central drive. On the PTO connected to the tractor, there is a drive which consists of transmission parts located in a plane

  vertical and in a horizontal plane. The elements of

  horizontally conveyed, carried by an L-shaped support block directly attack the two cutting mechanism knives while the vertical transmission parts, are coupled by their upper end,

  in motion, on the PTO.

  This cutting mechanism, frontal, pre-

  feels the disadvantage that the knives of the double knife mechanism require two levers each time

  oscillating, while between the horizontal oscillating levers

  rates and verticals, intermediate bars

  additional bearings and joints.

  On a crop cutting mechanism for agricultural work, self-driving harvesters, which is equipped with a turnstile and a transverse vistransporter, such a drive means can not be envisaged. In the

  case of a central training, it would also be necessary to

  see additional corner references.

  Publication DD-A 206 059 relates to a cutting mechanism having a mechanical knife driving device. Behind the split double mower bar there is a set of gears and a crank disk

provided on a support frame.

  Each input gear is connected to a

  knife through a lever system. The in-

  crank disk transmission is not shown in detail; it can be realized in the case of a mower of rod products with a central assembly only

  if a complementary angle transmission is used.

  This workout is specifically designed for wide-width double-knife cutting mechanisms in which the double knives are divided into

  minus two halves to form the cutting mechanism.

  The object of the present invention is to create a mower drive for harvesters of rod products which can be mounted in different

  ways on the cutting mechanism and presents a

  particularly light truction, considerably reducing

  noise and requiring very few operations

adjustment.

  The present invention proposes to create a knife driving device for a harvester rod products so that in addition to the reduction in length of the motor shaft, we obtain a block construction, reducing noise and that can be mounted anywhere in the trough of the mechanism

cutting.

  For this purpose, the invention relates to a device of the above type, characterized in that in the central zone of a base frame provided below

  a trough of the cutting mechanism, a means of

  Trailing knife assembly, which can be mounted differently, and which consists of two boltier halves having a bulk construction, removably joined between sheet metal partitions, and, in the casing halves, are housed a crank disk connected to the motor shaft and its crank pin with connecting rods and an eccentric closure disk, and in that between the bearing eyes directed forward, are housed at

  the manner of forks, bearing bushings

  bent levers, one end of which is connected by bearings to the connecting rods and the other end to knife bearing bearings provided with knives, being covered by a cover plate adapted to the

  shape of the trough - of the cutting mechanism.

  The casing halves which are joined by means of screw connections at their junction point, are screwed into tabs on rails fixed on sheet metal partitions and with bearing heels at the points of separation, on a base plate

which connects the chassis.

  The motor shaft which is provided in

  under the cutting mechanism trough and one side behind the base frame, is connected to the crank disk via a flexible clutch disk. In addition, the crank disk is housed as well as the eccentric disk connected by a connection conical to the crank pin and which is screwed on the front face and is blocked by a connection in the form of a connection cone and key or a similar connection, in rolling bearings inside the casing halves. Oblong holes are provided in the bearing eyelets of the casing halves, holes in which

  using adjusting screws through the discs

  In fact, the adjustment plates which are supported on the bearing bushings

  and others of pressure studs. The cover plate

  The knife drive is equipped at its front edge with wear-rails which act as knife support elements and whose application pressure is adjusted by means of a set screw. For

  damping oscillations and noise, the device for

  knife dragging that can be extracted from the trough-cutting mechanism on rails and on the plate of

  base contains silent-blocks or similar elements in

  be the rails and the legs and between the plate of

base and the heels of bearing.

  The neck training device

  which is assembled in a block construction, can be converted to be mounted on one side of the mechanism

  cutting or in the form of two training devices

  mounted on one side between the side walls, the driving device consisting of only one casing half, a crank pin of reduced length with only one connecting rod being attached to the point of separation, with a cover receiving the disc

  with eccentric and rolling bearing. The training tree

  which is caused by the baserelie apparatus on

  disc-crank housed in the boot half by the

  intermediate of a flexible clutch disc. The disc-

  crank thus driven moves the crank pin

-2572245

  carried eccentrically and whose end is fixed in the eccentric disc carried in the housing half. The two rods or the only one in the case of a unilateral drive, which are mounted on the crank journals, are carried by bearings on the ends of the crank levers directed towards the central point of separation. The two bent levers mounted between the bearing eyelets of the casing halves by their hinge sleeves, are connected by their ends steered forward to the two knives at the knife bearing bearings. The bent levers operate in the opposite direction, so that the drive efforts of the knives are almost compensated and act mainly inside the box. Thanks to the precise machining and common assembly of connecting rods and cranked levers in the casing halves, the adjustment of the association of the knives in the main direction of movement of the knives is eliminated; this removes complicated tuning devices and tuning work

  correspondents. Other advantages of the solution of the in-

  resident in the light construction of entra -

  knives produced in block form.

  After loosening the screw connections to the rails of the sheet metal partitions and the base plate and separating the motor shaft from the flexible clutch disc and knives with respect to the lever bearings of the levers elbows, we can extract the whole training A knives from below the trough

  cutting mechanism, backwards. In addition, it is pos-

  It is possible to universally use one-sided knife drive on one side as well as both sides of the cutting mechanism through the conversion of standardized parts. It should also be emphasized that the noise reduction achieved by damped mounting, noise reduction that can not be achieved with fixed drives

on the side walls.

  The present invention will be described

  in more detail with the help of an example of reali-

  schematically shown in the accompanying drawings, in which: - Figure 1 is a view from above

  the training of mowing knives.

- Figure 2 is a side view

in section according to A-A of FIG.

- Figure 3 is a section according to

B-B of Figure 1.

FIG. 4 is a view from above

  a unilateral drive of a cutterbar.

  FIG. 5 is a schematic view

  a central drive of a cutterbar.

  FIG. 6 is a schematic view of one-sided cutter bar drives

on each side.

  FIG. 7 is a schematic view

  a cutting bar drive provided on one side.

  In the central zone of a cutting mechanism, below a trough 1 of the cutting mechanism passes a base frame 2 interrupted by two sheet metal walls 3, 3 '. Rails 4, 4 'are attached to the two sheet metal walls 3,' 3 'and a base plate 5 connects the partitions 3, 3' to the base frame 2 of the cutting mechanism. The driving of the cutter bar consists of divided housing halves 6, 6 '; the two halves are fixed with tabs 7, 7 'on the rails 4, 4' and with bearing heels 8, 8 'on the base plate 5. A drive shaft 9 is connected to a disc-crank

  11 via a clutch disc 10, flexible.

  A crank pin 12 passing through the two housing halves 6, 6 'carries connecting rods 13, 13'. An eccentric disk 14 is fitted on the end of the crank pin 12 and is screwed onto the end face; the

  position of the eccentric disk 14 with respect to the

  Crank disk 12 of the crank disk 11 is fixed by a connection in the form formed by a cone and key connection 15 or the like. In this way, both

  parts can not be mounted with a bad orienta-

  tion and ensures the smooth movement of the connecting rods 13, 13 '. The crank disk 11 is housed in boltier half 6 and the eccentric disk 14 is housed in boltier half 6 with rolling bearings 16, 16 'whose dimensions correspond to the stresses. The connecting rods 13, 13 'mounted on the crank pin 12 are housed at their free ends in bearings 17, 17' of the ends of two crank levers 19, 19 'facing towards the intermediate point of separation 18 of the halves

  6, 6 '. The boltier halves 6, 6 'which surround

  The crank disk 11 and the eccentric disk 14 are integrally connected to their junction 18 by screw connections 20, whereas at the tabs 7, 7 'fixed to the rails 4, 4', there are eyelets 14. bearing

  21, 21 'in the form of spurs, directed outward.

  Between these bearing eyelets 21, 21 ', -

  the hinge bearing sleeves 22, 22 'are received from the crank levers 19, 19'. The knife bearing bearings 24, 24 'of the forwardly angled levers 19, 19' which are located above the knife plates 23, 23 ', control the oscillating movement of the knives.

  , 25 'by the rods 13, 13' driven by the disc-

  crank 11 and its crank pin 12. To receive

  see the bending torque resulting from the distance between the center of gravity of the knives 25, 25 'and the hinge points on the knife plates 23, 23', there are provided supports 26, 26 'at the plates knife holders 23, 23 'and surrounding them. To arrive

  at a precise adjustment of the elbow levers 19, 19 'with

  With the knives 25, 25 ', there is, as shown in FIG. 3, oblong holes 27 formed in the bearing eyes 21, 21'. Adjusting screws 29 which pass through the cover plates 28. are connected to the adjusting plates 30 which bear on either side on the hinge bearing sleeves 22, 22 'and whose guide pins 31 are housed in the

hinge sleeves 22, 22 '.

  The knife bearing bearings 24, 24 'directed towards the front, are covered by plates of

  covering 32 adapted to the shape of the trough 1 of the mech-

  cutting; at their front edge, these

  There are wear rails 33 acting as pushers for the knives. The adjustment of the application pressure on the knives 25, 25 'is done by means of adjusting screws 34. The cutting of the knives is carried out

  by a block construction, can, as is

  diagrammatically in Figures 5 to 7, to be made according to various variants. For driving one side of a knife 25 one side of the cutting mechanism or two knife drives, unilateral, provided in the side walls 35, 35 ', the drive of the knives is

  made only by one housing half 6, by a touril-

  12 shorter crank with only one rod 13 and a cover cover 36, fixed to the point of separation 18 and receiving the eccentric disk 15 and

the rolling bearing 16.

Claims (6)

R E V E N D I C A T I 0 N S 1) Training device of   knives for harvesters of stem products,   carrying a motor shaft arranged behind the trough of the cutting mechanism and to which are connected by crank pins and thrust rods, crank levers provided below the trough of the cutting mechanism and plates knife holders on which the knives are fixed, characterized in that in the central zone of a base frame (2) provided below a trough (1) of the cutting mechanism is fixed a means for knife drive, which can be mounted differently, and which consists of two boltier halves (6, 6 ') having a bulk construction, removably joined between   bulkheads (3, 3 '), and in the bowl halves   tier (6, 6 ') are housed a crank disc (11) connected to the motor shaft (9) and its crank pin (12) provided with connecting rods (13, 13') and an eccentric disc (14) closing, and that between the bearing eyelets (21, 21 ') directed forwardly, are housed in the manner of forks, the hinge bearing bushes (22, 22') of the bent levers (19, 19 ') of which one end is connected by bearings (17, 17') to the connecting rods (13, 13 ') and at the other end to knife bearing bearings (25.) provided with knives (26), by being covered by a cover plate (32) adapted to the shape of the trough (1) of the cutting mechanism.   2) A knife driving device according to claim 1, characterized in that the casing halves (6, 6 ') joined at a point of separation (18) by screw connections (20) are screwed into tabs ( 7, 7 ') on rails (4, 4') fixed to the sheet walls (3, 3 ') and at the separation points (18) at the bearing heels (8, 8') on a   base plate (5) which connects the base frame (2). 3) Training device of   knives according to any one of claims 1 and 2,   characterized in that the drive shaft (9) is   below the trough (1) of the cutting mechanism and one side behind the base frame (2), is connected to the crank disk (11) - via a flexible clutch disc (10) and in that the crank disk (11) and the eccentric disk (14) fixed by a connection in the form formed by a cone and key connection (15) or the like on the crank pin (12). ) while being   screwed on the front, are housed in rolling bearings   (16, 16 ') of the housing halves (6, 6'). 4) Training device of   knives according to any one of claims 1 to 3,   characterized in that the bearing eyes (21, 21 ') of the housing halves (6, 6') have oblong holes (27) in which adjusting screws (29) passing through the cover discs (28) are connected to the adjusting plates (30) which rest on the hinge bearings (22, 22 ') on both sides, and comprising guide bushes (31).  ) Training device   knives according to any one of claims 1 to 4,   characterized in that the cover plate (32) comprises   door at its front edge, wear rails (33) functioning as knife-applying devices and whose application pressure is set at using a set screw (34). 6) Training device of   knives according to any one of claims 1 and 2,   characterized in that the knife-driving device which can be extracted from the rails (4, 4 ') and the trough (1) of the cutting mechanism on the base plate (5)   is mounted via silent-blocks for   shooting vibrations and noise between the rails (4, 4 ') 25722.45   and the plates (7, 7 ') as well as between the base plate   (5) and the bearing heels (8, 8 '). 7) Training device of   knives according to one of claims 1 to 6,   characterized in that the batten driving device made by a block construction can be mounted on one side of the cutting mechanism or on both sides,   inside the side walls (35, 35 '), and   poses only a half bolitier (6), a shortened crank pin (12) with only a connecting rod (13) and a cover (36) fixed to the separation point (18) and receiving the disk a eccentric (15) and the bearing bearing (16).