JPH048223A - Transmission gear in thresher - Google Patents

Abstract

PURPOSE:To readily perform a maintenance for removing clogged straws by disposing a switch device for switching a chain into a tension state or a non- tension state, the chain being engaged with the driving shaft of a dust- discharging fan in a transmission case. CONSTITUTION:Since the first gear is driven with a driving shaft 4 in a transmission case 5, a chain is always rotated to the direction reverse, i.e., to the direction for compressing a tensional pressure spring 16, with the reverse force. The chain is surely operated at the end portion of the chain, especially at a place near to a straw-discharging carrying device 9, due to the presence of the tension spring 16 in response to the amount of the straws to smoothly carry the straws. On a work for removing clogged straws, a lever 17 is first rotated from a position of the continuous line to a position of the virtual line and the transmission case 5 and the end portion 23 of a chain rail can be thereby rotated to relax the chain into non-tension state, whereby the straws clogged between the start portion of the straw-discharging and carrying device 9 and the end portion of the chain 6 can be relatively readily removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a transmission device in a threshing machine, and is used in a combine harvester and the like.

[Prior art]

The conventional transmission device of this type of threshing machine is, for example,
As disclosed in Japanese Patent No. 127329, the drive sprocket of the #2 culm transfer chain that feeds the husk to the threshing machine while conveying the husk is provided on the husk supply side for transmission.

According to this configuration, the grain culm transfer chain has a defect in that it is difficult to remove clogged straw.

That is, the grain culm or waste being transferred becomes sluggish at the joint between the culm transfer chain and the waste straw conveying device, and clogging occurs at that part.

In such a case, in the conventional type described above, the drive sprocket is located on the culm supply side and is fixed, so
The structure is such that the transmission cannot be cut off by loosening the grain transfer chain significantly.

[Problem to be solved by the invention]

The present invention aims to create a device that can easily perform maintenance to remove straw clogging at the joint between the conveying chain and the straw removal conveying device, which often occurs in this type of threshing machine.

In particular, in the case of this invention, the drive sprocket mounted on the shaft at the rear end of the chain, that is, near the exhaust 7X transfer device, is constantly tensioned by a spring, and when maintenance is performed, the drive sprocket is rotated greatly together with the transmission case. 6 [Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention takes the following technical means. That is, a transmission case 5 whose input shaft is the drive shaft 4 of the haidan fan 3 installed in the dust removal section 2 of the threshing machine 1 is provided on the side of the chain 6, and a power take-off shaft 7 is extended from the transmission case 5 to the outside. A drive sprocket 8 is pivotally attached to the drive sprocket 8, and the drive sprocket 8 is provided with a pin 6 facing the starting end of the straw removal conveying device 9 so as to be transmittably engaged with the transmission case 5. This is a transmission device in a threshing machine equipped with a switching device i10 that switches a pinch chain 6 between a tensioned state and a non-tensioned state around a drive shaft 4 of a fan 3.

[Action/Effect]

First, when each rotating part of the machine is driven and rotational power is transmitted to the drive shaft 4, the dust removal fan 3 is rotated by the transmission, sucks the dust from the sorting chamber 11, and removes the dust from the dust 012 to the outside of the machine. Exhaust dust.

In the pinch chain 6, the rotational power transmitted from the drive shaft 4 through the transmission gear 13 is transmitted through the power take-off shaft 7 and the drive sprocket 8, and carries out the action of conveying the culm.

If the preparation is made as described above and the shell culm is supplied to the starting end of the clamping chain 6, the shell culm will be supplied to the handling room 20 while being clamped and conveyed by the clamping chain 6 and the guide rod 14. and receives threshing action.

After the culm is threshed, it is processed into a chain 6.
The receiving straw is connected from the terminal end to the straw conveying device 9 and is supplied to the cutter 15 at the rear.

In such a process of transporting the culm, the chain 6 is
It is pressed downward depending on the thickness of the grain culm layer to be transported, and the force pushes down the transmission case 5 via the drive sprocket 8.

Therefore, the transmission case 5 rotates downward against the tension spring 16 using the drive shaft 4 as a fulcrum, and automatically adjusts the distance between the chain 6 and the guide rod 14 to the distance W8 that is suitable for the amount of the culm. This has the effect of allowing smooth conveyance even if the amount changes as much as #2.

Next, the transmission case 5 includes the terminal portion of the chain 6,
Alternatively, if straw waste is clogged between the starting end of the straw conveying device 9 and the clamping chain 6, as shown in FIG. 18 and lower it upward to open the chain 6.

Therefore, the clogged straw waste can be removed.

〔Example〕

First, its configuration will be explained.

As shown in FIG. 2, the threshing machine 1 includes a sorting chamber 11 provided below a handling chamber 20 having a handling barrel 19.

The dust exhaust section 2 includes a dust exhaust fan 3 located above and behind the sorting chamber 11.
The structure is such that the filter is mounted on a shaft and can suck and discharge the sorted dust.

The drive shaft 4 on which the dust removal fan 3 is mounted is configured to receive power from -9 shafts, and a transmission case 5 is attached to the other side to extract rotational power.

The transmission gear 13 in the transmission case 5 includes a first gear 13a attached to the drive shaft 4, a third gear 13c attached to the power extraction shaft 7, and a second gear 1 meshed between the two.
3b.

The drive sprocket 8 is attached to the power take-off shaft 7 and is configured to mesh with the chain 6 to transmit power.

The transmission case 5 is configured to be able to rotate about the drive shaft 4 at the base as a fulcrum, and is provided with a tension spring 16 in the tension direction so as to be able to swing.

The transmission case 5 is configured to be switched between a tensioned state and a non-tensioned state by means of a switching device 10, which is configured such that a catch 18 that receives the base of a tension spring 16 is moved to a third position by operating a lever 17.
The chain 6 can be rotated from the state shown in the figure to the state shown in Fig. 1.
The structure is such that it can be switched between a tensioned state and a relaxed state.

Note that 23 indicates the end of the chain rail, and the transmission case 5
It is configured so that it can work together.

Reference numeral 9 denotes a straw removal conveying device, the starting end of which is provided close enough to the terminal end of the pinching chain 6 to the extent that the straw receptacle can be spliced.

15 carries a cutter for cutting straw.

With the construction as described above, work is started while immediately moving each rotating part of one machine.

The clamping chain 6 is transmitted from the driving shaft 4 through transmission gears 13 (first gear 13a, second gear 13b, third gear 13c), and conveys the culm while clamping it between it and the guide rod 14. do.

The husks are then supplied to the handling chamber 20, subjected to a threshing action by the handling cylinder 19, and conveyed one by one.The husks are then transferred from the terminal end of the scooping chain 6 to the straw conveying device 9, where they are supplied to the cutter 15 and cut. and ejected from the aircraft.

During such action, the transmission case 5.

Since the first gear 13a is driven by the drive shaft 4 in the direction of the arrow, the reaction force causes the first gear 13a to be driven in the opposite direction, that is,
It is always rotatable in the direction of compressing the tension spring 16.

Due to the presence of the tension spring 16 at the end portion, especially the portion near the discharged N conveying device 9, the pinching chain operates reliably in accordance with the amount of grain culm to smoothly convey the husk.

Next, to remove the clogged straw, first operate the lever 17 from the solid line position in FIG. 3 in the direction of the imaginary line to the position shown in FIG. It is possible to loosen the clamping chain 6 to a non-tensioned state by rotating it.

Therefore, the straw stuck between the starting end of the straw transporting device 9 and the ending end of the spacing chain 6 can be removed relatively easily.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of the main parts, Fig. 2 is a side sectional view of the threshing machine, Fig. 3 is a side view, and Fig. 4 is a partially cutaway view. FIG. 5 is a cross-sectional and developed back view of the main parts. Explanation of symbols 1...Thresher 3...Dust exhaust fan 5...Transmission case 7...Power take-off shaft 9...Straw removal transport device 11...Sorting chamber 13...Transmission gear 13b...Second Gear 14... Guide rod 16... Tension spring 18... Seat 20... Handling chamber 2... Wandering section 4... Housing drive shaft 6... Clamping chain 8... Drive sprocket 0... ...Cut device 2...Dust outlet 3a...First gear 3c...Third gear 5...Cutter 7...Operation lever 9...Handling barrel 3...End of chain rail! Figure 4:5 Name of patent author Representative Iseki Agricultural Machinery Co., Ltd. Mizu 1) Eihisa

Claims (1)

[Claims] (1) A transmission case 5 whose input shaft is the drive shaft 4 of the dust removal fan 3 installed in the dust removal section 2 of the threshing machine 1 is provided on the side of the chain 6, and the power is extracted from the transmission case 5 to the outside. A drive sprocket 8 is attached to the shaft 7, and a pinch chain 6 facing the starting end of the straw removal conveying device 9 is connected to the drive sprocket 8 so as to be able to transmit data, and the transmission case 5 is connected to the dust removal device. A transmission device in a threshing machine equipped with a switching device 10 that switches the pinching chain 6 between a tensioned state and a non-tensioned state around the drive shaft 4 of the fan 3.