CN2247411Y - Cutter transmission for harvester - Google Patents

Abstract

The utility model relates to a cutter transmission mechanism for a harvester, comprising a long connecting rod, a rocking block, a guide rod, and a belt pulley provided with an eccentric shaft. The relationship among the eccentric distance r of the eccentric shaft, the length a of the short arm of the rocking block, the length b of the long arm of the rocking block, and the space width s of a blade protecting device is that s=rbxr/a1<r<=2. The long connecting rod is hinged with the short arm of the rocking block by a knuckle bearing. The utility model has the advantages of driving balance, less noise, high reliability, etc.

Description

Grain header cutter transmission mechanism

The utility model relates to the cutting drive technology of grain header.

Existing grain combine cutter transmission mechanism, " 4L2.5B Guilin-No. 3 " rice/wheat combine of producing as Guilin combine factory, adopt crank driving mechanism, it comprises the belt pulley with eccentric shaft that is connected with power, long connecting rod, centering block, power rail, guide rod, guard, chute and finger beam, one end of long connecting rod and the eccentric shaft court on the belt pulley are held hinged, the other end and centering block galianconism are hinged, guide rod connects together centering block and moving knife bar, the moving knife bar is installed on chute and the guard, be fixed with knife section on it, the gap of moving knife and knife section is 76.2 millimeters; Guard and chute are fixed on protecting on the cutter device beam of frame, are fixed with ledger-plate on the guard, and the gap of ledger-plate and ledger-plate is 76.2 millimeters.Belt pulley is by power drive, eccentric shaft on belt pulley, long connecting rod, the conversion of centering block and guide rod, drive power rail, promptly cutter does reciprocating linear motion, the moving circle of belt pulley revolution, cutter comes and goes 76.2 millimeters, in order to guarantee the cutting speed of cutter, the rotating speed of belt pulley is selected 470-540 rev/min usually for use, and this structure is because the rotating speed height of belt pulley, the stroke of power rail is lacked (being generally 76.2 millimeters), the reciprocal coherence power of power rail is big, causes that therefore ceding of Taiwan vibrations are big, the noise height, transmission stability is poor, has reduced the reliability of header frame simultaneously; Long connecting rod of being made up of bulb, ball seat, spherical cap and the wearing and tearing of the articulated structure of centering block are big, and dependability is low.

In addition, the transmission of grain header cutter also has mechanism driving such as pendulum ring and planetary gear, but these structures are made complexity and manufacturing expense height, are not easy to maintenance.

The purpose of this utility model provides a kind of cutter round trip bigger at above-mentioned situation, and is simple in structure, service-strong, particularly motion steadily, shake little, the grain header cutter transmission mechanism that noise is low.

The cutter transmission mechanism of the utility model grain header, it comprises by rolling bearing pedestal and is installed on the frame by power drive and has the belt pulley of eccentric shaft, the finger beam of long connecting rod, centering block, guide rod, moving knife bar, guide rail, mounting guide rail and guard; One end and the eccentric shaft of long connecting rod are hinged, the galianconism of the other end and centering block is hinged, one end of guide rod and centering block long-armed hinged, the other end and moving knife bar are hinged, be fixed with knife section on the moving knife bar, be fixed with the rolling bearing that in guide rail, moves near an end of guide rod below, its knife section be adjacent fixed on the moving knife bar, the space width of guard is that the ledger-plate spacing equates with the gap of knife section; The long connecting rod and the centering block galianconism of above-mentioned grain header cutter transmission mechanism are to be articulated and connected by oscillating bearing; There is following relation in the space width S of the short r of the off-centre of eccentric shaft, guard with the galianconism length a of centering block, long-armed length b, $S=R\frac{\mathrm{br}}{a},$ 1≤R≤2 wherein; The moving knife bar is fixed with rolling bearing near guide rod one end below.

The oscillating bearing that the articulated structure of above-mentioned long connecting rod and centering block galianconism adopts, oscillating bearing is made up of Internal and external cycle, and its oscillating bearing inner ring is connected by the axle that is fixed on the centering block galianconism, and the outer ring of oscillating bearing is connected with long connecting rod.

Above-mentioned oscillating bearing outer ring is fixed on the shell, and long connecting rod is connected with shell, has a lid on the shell.

Advantage of the present utility model, stable drive shakes for a short time, and noise is low and simple in structure, and manufacturing expense is low, the dependability height.

Followingly in conjunction with the accompanying drawings technology contents of the present utility model and architectural feature are described further:

Fig. 1 is a kind of drive mechanism schematic diagram of the present utility model;

Fig. 2 cuts view for the A-A of Fig. 1;

Fig. 3 cuts view for the B-B of Fig. 1.

Referring to Fig. 1, this transmission mechanism includes by rolling bearing pedestal and is installed on the frame by belt pulley 2, long connecting rod 3, centering block 4, guide rod 5, moving knife bar 6, guide rail 7, mounting guide rail and finger beam 8 power-actuated and band eccentric shaft 1, one end and the eccentric shaft 1 of long connecting rod 3 are hinged, the galianconism of the other end and centering block 4 is hinged, one end of guide rod 5 and centering block long-armed hinged, the other end and moving knife bar 6 are hinged, are fixed with knife section 9 on the moving knife bar.This part technology and existing cutter transmission mechanism are similar, and relevant structure sees also the cutter technology of existing grain header, does not describe in detail at this.

Referring to Fig. 3, above-mentioned long connecting rod 4 is to be articulated and connected by oscillating bearing 10 with the centering block galianconism; Oscillating bearing 10 is made up of inner ring and outer ring 12 and 13, and the outer ring is connected with long connecting rod; Inner ring is connected by the axle that is fixed on the centering block galianconism.Referring to Fig. 3, the oscillating bearing outer ring can be fixed on the shell 14 again, and shell 14 is connected with long connecting rod, has an adjustable structure 11 at its connecting portion, to guarantee to regulate the length of long connecting rod, relevant adjustable structure 11 can adopt existing threaded adjusting tubular construction, does not elaborate at this.

Referring to Fig. 1, the utility model drives the eccentric shaft rotation by belt pulley in use, thereby orders about the long connecting rod motion, drives the centering block rotation, causes guide rod to drive the moving knife bar and does reciprocating linear motion, and finishes the work of cutting cereal.

Claims (4)

1, a kind of grain header cutter transmission mechanism, it comprises by rolling bearing pedestal and is installed on the frame finger beam (9) by belt pulley (2), long connecting rod (3), centering block (4), guide rod (5), moving knife bar (6), guide rail (7), mounting guide rail and the guard (8) of power-actuated and band eccentric shaft (1); One end of long connecting rod (3) and eccentric shaft (1) are hinged, and the galianconism of the other end and centering block (4) is hinged, an end of guide rod (5) and centering block long-armed hinged, and the other end and moving knife bar (6) are hinged, are fixed with knife section (10) on the moving knife bar, it is characterized in that:

A, long connecting rod (4) are to be articulated and connected by oscillating bearing (11) with the centering block galianconism;

The eccentric throw r of b, eccentric shaft, there are following relation in the long-armed length b of centering block, the space width S of galianconism length a and guard: $S=R\frac{b\&CenterDot;r}{a},$ 1≤R≤2。

2, cutter transmission mechanism according to claim 1 is characterized in that: oscillating bearing (11) is made up of inside and outside circle (12), (13), and the outer ring is connected with long connecting rod; Inner ring is connected by the axle that is fixed on the centering block galianconism.

3, cutter transmission mechanism according to claim 2 is characterized in that: the oscillating bearing outer ring is fixed on the shell, and shell is connected with long connecting rod.

4, according to claim 2 or 3 described cutter transmission mechanisms, it is characterized in that: oscillating bearing outer ring and adjustable being connected of long connecting rod.

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