JPS63102608A - Reaping blade driving structure - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to the structure of a drive section of a cutting blade of a combine harvester or the like.

(b) Prior art The cutting blade drive structure of conventional combine harvesters, etc.
It was constructed as described in Japanese Patent No. 7-149733.

(c) Problems to be Solved by the Invention When a reaping device such as a combine harvester has a structure in which a reciprocating cutting blade slides, in order to reciprocate the cutting blade, the rotation of the drive unit is not smooth. This occurs, and the non-smooth rotation is transmitted to other parts such as the vertical conveyance device C, the scraping conveyance device E, and the raising device B, causing conditions such as intermittent drive and reverse movement of the conveyance section, resulting in abnormalities. This caused significant vibration and noise.

The present invention aims to solve these problems of the prior art.

(d) Means for Solving the Problems The objects of the present invention are as described above. Next, the configuration for achieving the objects will be explained.

In a configuration in which the power from the engine is branched to each part of the reaping and conveying device, such as a raising device B, a raking conveying device E, a vertical conveying device C, and a reaping device F, a raising device B, a raking conveying device E, and a vertical conveying device are used. A one-way clutch 3 for preventing reverse rotation of the cutting blade drive shaft 12 is interposed on a bearing part of the driving system for only the cutting blade 1 that reciprocates at a position branched from the driving system of the device C.

(E) Functions of the Invention The present invention, constructed as described above, has the following functions.

That is, when reciprocating the cutting blade, the cutting blade drive shaft 12
is simply rotating in one direction,
Since the cutting blade is reciprocated, it is necessary to move the cutting blade 1 sliding in one direction back next time by rotating the cutting blade drive shaft 12 in the same direction.

At this time, the cutting blade 1 tries to continue its movement in the previous sliding direction due to inertia, so a force is exerted in the direction of pulling the cutting blade drive shaft 12 back in the reverse rotation direction due to the inertia.
It is. If the driving horsepower from the engine to the reaping conveyance device is large, the cutting blade 1 will not rotate in the opposite direction due to the pullback rotation due to the inertia force, but it will rotate with the necessary limit of horsepower, and the pulling device B When a large amount of power is being taken by the cutting blade transport device E, etc., the driving force of the cutting blade 1 becomes small, and the cutting blade drive shaft 12 rotates in the opposite direction due to inertia force, causing the cutting blade drive shaft 12 to rotate in the opposite direction. The reverse rotation also reversely rotates the previously branched drive gears such as the raising device B, the scraping conveyance device E, and the vertical conveyance device C through the meshing gears, resulting in intermittent This manifested itself in abnormal rotations, abnormal vibrations and noise in various parts.

In the present invention, in order to prevent reverse rotation of the cutting blade drive shaft 12 due to the inertial force of the cutting blade 1, a one-way clutch is provided in the cutting blade drive shaft 12 or in the drive system of only the cutting blade 1 to prevent reverse rotation. 3 is inserted.

By interposing the one-way clutch 3 in this way, even if the cutting blade drive shaft 12 tries to rotate in the opposite direction due to the inertia of the cutting blade 1, the one-way clutch 3 prevents the blade from rotating in the opposite direction.

(f) Embodiment The object, structure, and effects of the present invention are as described above. Next, the structure of the embodiment shown in the attached drawings will be explained.

Fig. 1 is a plan view of the cutting blade drive system, Fig. 2 is a power transmission diagram showing the drive system of the reaping transport device of the combine, and Fig. 3 is a sectional view of the cutting drive case A of the cutting blade drive shaft 12. , FIG. 4 is a side view of the one-way clutch, and FIG. 5 is a plan view of the reaping and conveying device of the combine harvester.

In FIG. 5, in the case of a combine harvester, a reaping and conveying device supported movably up and down by a hydraulic cylinder is provided at the front of the threshing device.

The reaping and conveying device is composed of a raising device B, a vertical conveying device C, a raking conveying device E, a reaping device F, etc. The rotation from the engine E is input into the reaping drive case A, and the reaping drive Power is branched and transmitted from case A to each of the above-mentioned parts.

In the present invention, a one-way clutch 3 is disposed on the power transmission system for only the reaping device F to prevent reverse rotation of the cutting blade drive shaft 12 due to the inertial force of the cutting blade 1.

Next, this will be explained with reference to FIGS. 1 and 2. Power is transmitted from the engine E to the pulley 4 on the input shaft 16 of the reaping drive case A. The structure inside the reaping drive case A is as follows:
This is illustrated in the power transmission diagram of FIG. 2, and six shafts are arranged inside the reaping drive case A. In addition to the input shaft 16, the reaping latch shaft 28, deceleration shaft 25, and PTO
A shaft 17, a counter shaft 18, a cutting blade drive shaft 12, etc. are arranged. A gear 30 on the input shaft 16
The clutch gear 29 on the reaping latch shaft 28 meshes with the
The rotation after the power connection/disconnection is transmitted to the gear 19. The gear 19 meshes with the gear 20 on the reduction shaft 25, and furthermore, the small diameter gear 21 on the reduction shaft 25 meshes with the gear 22 on the PTo shaft 17, which gear 22 meshes with the gear 23 on the counter shaft 18. It meshes with the gear 24 on the cutting blade drive shaft 12 via.

The cutting blade drive shaft 12 is rotated by the gear 24.

In addition, a PTO shaft 17 protrudes from the middle of the reaping drive case A to the left and right, the left side transmits power to the vertical conveyance device drive case 5, and the protrusion to the right side is used to drive the raking conveyance device E and the raising device B. Power is transmitted to case 6.

In the present invention, after the power from the engine is branched to the drive case 5 of the vertical conveyance device, the raking conveyance device E, and the drive case 6 of the raising device B, it is distributed in one way on the drive system of only the reaping device F. A clutch 3 is arranged.

A crank arm 2 is disposed at a portion where the cutting blade drive shaft 12 protrudes outside of the cutting drive case A. A drag rod 11 is connected to the ε-lifting rank arm 2, and the tip of the drag rod 11 is connected to a bell crank 10. It is pivotally connected to one end of the . The other end of the bell crank 10 is fitted into the long hole of the cutting blade 1.

By sliding the cutting blade 1 from side to side on the receiving blade 7,
The culm is cut between the receiving blade 7 and the cutting blade 1.

In the above configuration, the present invention has a one-way clutch 3 interposed on the rotating outer periphery of the cutting blade drive shaft 12 as shown in FIG.

In the embodiment shown in FIG. 3, the one-way clutch 3 is disposed at the bearings 26 and 26 of the cutting blade drive shaft 12, but the invention is not limited to this embodiment, and as shown in FIG. Just like that, crank arm 2 and drag rod 11
A one-way clutch 3° is attached to the bearing 9 that connects the
It is also possible to intervene as in

Although there are various configurations of the one-way clutch 3, FIG. 4 shows a one-way clutch in which a bean-shaped engaging body is interposed between an outer race and an inner race.

(G) Effects of the Invention Since the present invention is configured as described above, it has the following effects.

First, the cutting blade 1 reciprocates left and right, so if it slides in one direction, it must then change direction and slide in the other direction. The reciprocating motion is caused by the cutting blade drive shaft 1
2 is changed into a reciprocating motion by the crank arm 2, the rotation of the cutting blade drive shaft 12 itself always rotates in the same direction, but in reality, the cutting blade 1 rotates in one direction. Since it is necessary to brake the rotation and then change the rotation to the other direction, a large inertial force acts in the direction of pulling the drag rod 11, and the cutting blade drive shaft 12 momentarily rotates in the opposite direction. be.

The reverse rotation is transmitted to the drive unit of the raising device B, the reaping drive case A, and the vertical conveyance device C through each shaft and gear, causing the conveyance chain to rotate intermittently or, at short intervals, to move back and forth. This is what we do. This caused the parts to vibrate and make noise.

The present invention interposes a one-way clutch 3 on the drive system of the cutting blade 1, so that the reverse rotation of the cutting blade drive shaft 12 generated by the inertia of the cutting blade 1 is transferred to the fixed wall of the cutting drive case A. It was possible to prevent the abnormal vibration and noise mentioned above by locking and preventing the vibration.

Second, by interposing the one-way clutch 3,
Since we were able to eliminate reverse rotation and reduce abnormal vibrations and abnormal noise, there is no need for a conventional balance weight that moves in the opposite direction to the movement of the cutting blade 1 to eliminate this vibration. This makes it possible to replace it with something smaller than before.

[Brief explanation of the drawing]

Figure 1 is a plan view of the cutting blade drive system, Figure 2 is a power transmission diagram showing the drive system of the reaping and conveying device of the combine, and Figure 3 is the cutting drive case A of the J-axis 12 that drives the cutting blade. FIG. 4 is a side view of the one-way clutch, and FIG. 5 is a plan view of the reaping/conveying device of the combine harvester. A... Reaping drive case B... Raising device C... Vertical conveyance device E... Scratching conveyance device F... Reaping device 1... Cutting blade 2... ... Crank arm 3 ... One-way clutch 5 ... Vertical transport device drive case 5 6 ... Driving case 7 for scraping transport device E and raising device B ... Receiving blade

Claims (1)

[Claims] In a configuration in which the power from the engine is branched to each part of the reaping and conveying device, such as a raising device B, a raking conveying device E, a vertical conveying device C, and a reaping device F, the raising device B, the raking conveying device E, and the vertical conveying device are A mower characterized in that a one-way clutch 3 for preventing the reciprocating reciprocation of the mower blade drive shaft 12 is interposed on the bearing part of the drive system of only the reciprocating mower blade 1 at a position branched from the drive system of the device C. Blade drive structure.