JPH0541657Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement of the working part mounting structure of an agricultural working machine.

Conventional technology Agricultural working machines, such as combine harvesters,
For the purpose of making it easier to maintain the threshing unit mounted on the machine and replace the cutter cutting blade, etc., a structure in which the working part of the culm cutting device (cutter) etc. can be opened and closed is provided. (for example, in 1987-
194932, etc.). Such an opening/closing type cutter or the like is usually configured to be rotated laterally around a pivot provided on one side of the rear end of the machine.
In addition, a belt transmission system is generally used to transmit power to the cutter, etc., and the belt is stretched between the drive pulley located on the machine side, located on the opposite side of the pivot, and the input pulley installed on the cutter side. It is introduced via a transmission belt, and the transmission belt must be attached and removed each time the cutter is opened and closed.

Problems that the invention aims to solve: However, it is difficult to attach and detach the transmission belt, and conventionally, some devices have been designed so that the belt tension can be switched between working and non-working to make it easier to attach and detach the belt. However, it is still not easy to remove the transmission belt, which has been tensioned in advance, from the pulley groove.

Means for Solving the Problems Therefore, the present invention is to attach a working part such as a cutter so as to be rotatable in the lateral direction via a pivot provided on one side of the rear end of the main agricultural working machine. The input pulley of the transmission belt for introducing power from the drive side of the machine is pivotally supported on the rotating tip side of the working part, and the working part is moved from the working set position to the main part of the agricultural working machine with the pivot part as the center. This is intended to solve the above-mentioned problems by making it rotatable by a predetermined angle θ in the direction toward the machine.

Operation When opening the working part of a cutter or the like for maintenance of the threshing part, first release the lock between the working part and the machine, and then open the working part around the pivot point to the main machine side of the agricultural work machine. If it is rotated by a predetermined angle θ in the direction of
As the input pulley moves toward the drive pulley installed on the machine side, the transmission belt loosens and
The belt can be easily removed, and after removing the belt, the working section can be opened by rotating it in the direction away from the machine, making maintenance such as servicing the threshing section and replacing parts of the working section possible. can be easily done.

Embodiment The drawings show a combine harvester 1 as an agricultural working machine, and a cutter 2 attached to the rear end of the combine harvester 1 on the machine side as a working part. 3 is a feed chain of the threshing section 4. 5 is a straw removal chain, which is installed from the end of the feed chain 3 to the rear center of the machine. The cutter 2 is attached so as to be rotatable in the lateral direction by a pin 7 via a pivot 6 provided on one side of the rear end of the machine (on the right side in Figure 1, on the tip side with respect to the conveyed straw). .

Reference numeral 8 denotes a drive pulley located on the opposite side of the pivot 6 and provided on the machine side. A transmission belt 10 is connected between the drive pulley 8 and an input pulley 9 supported by a bracket 2' fixed to the cutter frame. It is being handed over.
Reference numeral 11 denotes a belt tension, which is always biased toward the belt tension side by a bullet 12, and the power transmitted from the drive side of the machine to the input pulley 9 by the belt is transferred to the chain ring 1.
3, 14 and the chain 15 to the cutting blade 2a and the scraping blade 2b, causing the double blades 2a, 2b to rotate in the direction of the arrow in FIG. The culms are cut into predetermined lengths and then released into the field. 16 is a switching cover pivotally supported on the upper part of the cutter 2 so that it can be raised and lowered.

Reference numeral 17 denotes an L-shaped fixture protruding from the rotating tip side of the cutter 2, and the fixture 17 is attached to a nut 19 fixed to a bar 18 that integrally extends rearward from the machine.
Set the bolt 20 by overlapping it with the L-shaped catch 19 with a.
By tightening the cutter 2, the cutter 2 is fixed at the proper set position.

21 is a hook fixed to this machine, and the hook 21
By fitting a pin 22 attached to the cutter 2 into the recess 21a, the cutter 2 is positioned at a proper set position, and the hook 21 supports the load on the free end side of the cutter 2. still,
A play is provided in the pivot 6 so that the free end of the cutter 2 can move up and down slightly. 23 in the figure is a counter.

In the above configuration, when opening the cutter 2 for maintenance of the threshing section 4 or replacement of the scraping blade 2a and cutting blade 2b of the cutter 2, the set bolt 2 must be opened.
0 to release the lock between the cutter 2 and the machine, then lift the free end of the cutter 2 slightly and rotate it forward by a predetermined angle θ around the pivot 6, that is, in the direction of the agricultural work machine. When the input pulley 9 and drive pulley 8 are moved, the distance between the axes of the input pulley 9 and the drive pulley 8 is shortened from l shown in Figure 3 to l' shown in Figure 2, so the transmission belt 10 becomes loose and the belt tension 11 does not act. becomes. Therefore, the transmission belt 10 can be easily removed by hand. After removing the transmission belt 10, the cutter 2 is opened by rotating it backwards, so maintenance such as maintenance of the threshing section 4 and replacement of parts such as the cutting blade 2b of the cutter 2 can be easily performed. I can do it.

Since the belt 10 can be easily attached and detached by rotating the cutter 2 forward from the working set position by a predetermined angle θ, a dedicated mechanism such as a toggle mechanism for detaching the belt 10 is separately provided. Therefore, the structure can be simplified and costs can be reduced, and the cutter 2 can be opened and closed easily.

Effects of the Invention As described above, the present invention mounts a working part such as a cutter so as to be rotatable in the lateral direction via a pivot provided on one side of the rear end of an agricultural working machine. The input pulley of the power transmission belt for introducing power from the drive side of the machine is pivotally supported on the rotating end side of the machine, and the working part is moved from the working set position to the main machine side of the agricultural work machine with the pivot point as the center. A predetermined angle θ in the direction
Since it is configured to be rotatable, the transmission belt required when opening the working part can be easily attached and removed by simply rotating the working part in the opposite direction to the opening direction, thereby further improving maintainability. I can do it.

[Brief explanation of drawings]

Figure 1 is a plan view of the working part rotated by θ toward the agricultural work machine from the set position, Figure 2 is a side view of the same, and Figure 3 shows the working part moved to the set position. A side view of the fixed state; Figure 4 is a side view of the state rotated rearward around the pivot;
FIG. 5 is a plan view of the same as above, and FIG. 6 is a perspective view of the cutter fixing part. In the figure, 2 is a cutter, 6 is a pivot, 9 is an input pulley, and 10 is a transmission belt.

Claims (1)

[Scope of utility model registration request] A working part such as a cutter is attached so as to be rotatable in the lateral direction via a pivot provided on one side of the rear end of the agricultural work machine, and a drive side of the machine is mounted on the rotating tip side of the working part. The input pulley of the power transmission belt for introducing power from the input belt is pivotally supported, and the working part is configured to be rotatable by a predetermined angle θ in a direction toward the agricultural working machine main body from the working set position around the pivot part. A working part mounting structure for an agricultural working machine characterized by the following.