JPH023738Y2 - - Google Patents

Description

[Detailed description of the invention] This threshing machine is mounted on a combine harvester, etc., and has a so-called cross-blowing configuration in which a sorting air passage is provided parallel to the handling barrel axis from the bottom of the handling chamber to the rear dust removal chamber.
In models where the input shaft installed to drive the handling cylinder, sorting section, etc. is supported at the rear of the handling room and in front of the dust removal chamber in a direction perpendicular to the handling cylinder axis, the threshing machine is powered by a belt from the engine that serves as the power source. When power is transmitted to the above input shaft of a diesel engine, the output shaft is
Although it is 2700R.PM, the input shaft is normally 1000 to 2000R.P. to facilitate transmission of power to the sorting section as shown below.
Set to M. In other words, generally, the rotating shafts other than the handling cylinder shaft, that is, the rotating shafts of the sorting section, etc., are installed horizontally in the same direction as the input shaft, and the number of rotations is around 1000 revolutions, and the transmission mechanism of the sorting section is relatively It is easy to configure. However, the handling cylinder shaft is installed perpendicular to the input shaft, and its rotation speed is around 500R.PM.
In addition, since it is set lower for rice and higher for wheat, etc., a gear case with a built-in device that performs the three functions of deceleration, direction change, and speed change is interposed between the input shaft and the handling barrel shaft. I have to let it happen. Therefore, as shown in FIG. 6, an intermediate shaft C is provided at right angles to the input shaft 27 and parallel to the handling cylinder shaft 9a, and the direction is changed by a pair of bevel gears A and B provided on both sides, and a transmission shaft parallel to the intermediate shaft C is provided. A conceivable method is to provide a gear shifter D for gear shifting and further provide a pair of reduction gears E between the gearshift shaft D and the handling cylinder shaft 9a for deceleration, but this method requires a reduction gear and thus has a complicated structure. , the gear case will also be larger. In addition, if the pair of bevel gears A and B mentioned above also serve as a speed reducer, there is no need to provide a separate reduction gear, but since the speed change section rotates at a low speed and the transmitted torque increases, the speed change gear needs to be strong and large. It has no choice but to form. Therefore, if the direction is first changed using bevel gears A and B as described above, the gear case itself will be structurally larger in both cases, and the speed change shaft will be in the same direction as the handling cylinder axis, so the gear case will be in the same direction as the handling cylinder axis. The central part of the fourth exit is long in the front and back direction, with the center part near the rear wall of the handling room.
Particularly in the case of top-handling threshing machines, the waste culm that exits from the waste culm discharge port and is transferred to the straw removal chain and is transported passes over the top of these transmission devices, causing it to fall during transport. Particularly in the case of wet material, debris may accumulate on it and prevent the discharge of the culm, or it may solidify and fall onto the oscillating sorter, impairing sorting or causing clogging. This tendency is severe, and when changing the speed of the rotation of the handling cylinder, especially when changing the speed of the feed chain at the same time, it becomes complicated and difficult to obtain the optimum speed change balance between the two.

Therefore, the present invention was devised in view of these deficiencies.The input shaft installed to drive each part of the threshing machine, such as the handling cylinder and sorting part, is placed at the rear of the handling chamber and in front of the dust removal chamber in a direction perpendicular to the handling cylinder axis. In a supported top-handling threshing machine, the input shaft and a speed change shaft provided parallel to the input shaft are connected by a speed change device capable of selectively changing speed transmission, and a pair of speed change shafts are connected from the output side of the speed change shaft. The handling cylinder shaft is configured to be driven through a reduction bevel gear of
By operating the above-mentioned transmission device, only the handling cylinder can be changed in speed, and the gear case that houses the transmission device can be made extremely compact, and it can be mounted on one side of the rear part of the fourth port. This eliminates the above-mentioned defects peculiar to threshing machines, and also makes it possible to easily obtain the optimum speed of the handling cylinder for the grain to be threshed.

An embodiment of the present invention will be explained with reference to FIGS. 1 to 5. In the figure, 1 is a combine harvester machine supported by a running section 2 and with a pre-processing section 3 supported in the front.
A driving panel 4 and a seat 5 are provided upright in the front part. Reference numeral 6 is a top-handling type threshing machine placed on one side of the machine stand 1, 7 is a paddy hopper provided on the other side, and 8 is an engine placed behind it. The power of the engine 8 is transmitted to the threshing machine 6 on the one hand, and the power on the other hand is transmitted to the running section 2 and the pretreatment section 3 via the transmission case.

The handling barrel 9 of the threshing machine 6 has a front wall 1 forming a handling chamber 10.
1 and the rear wall 12, and the handling trunk shaft 9a extends rearward. 11a is a grain supply port provided on the front wall 11, 12a is a grain discharge port provided on the rear wall 12, 13 is a feed chain installed on the side of the handling room 10, and 14 is an exhaust port connected to the feed chain 13. In the straw chain, the grain culm supplied to the handling chamber 10 by the feed chain 13 is discharged from the grain culm discharge port 12a, and is transported rearward by the straw removal chain 14. 15 is the dust removal room 16 behind the handling room 10
It is the fourth port formed at the front, and number 17 is a cutter attached to the rear of the fuselage. 18 is a receiving net stretched at the bottom of the handling chamber 10, and a dust inlet 18 is installed at the end of the handling chamber 10.
a is open.

19 is a winnow installed below the beginning of handling room 10, 20
21 is a dust exhaust fan installed at the top of the dust chamber 16, and 21 is a dust exhaust port opened at the rear of the machine. A sorting air passage 22 is formed. Reference numeral 23 denotes a swinging sorting body installed in the sorting air passage 22 and swinging in the longitudinal direction of the machine body. 24 is the first receiving gutter installed horizontally below the center of the swinging sorter 23;
5 is the second gutter installed horizontally behind it. Reference numeral 26 denotes a gear case installed near the feed chain 13 at the rear side of the fourth port 15. An input shaft 27 protrudes laterally from the gear case 26. An input pulley 27a is rotatably attached to the tip of the input shaft 27, and the input pulley 27a is connected to the engine pulley. Power from the engine is input through a belt 28 stretched between them. .

The input shaft 27 is connected to the coupling 2 in the gear case 26.
9 to a geared shaft 30, and is connected to a transmission shaft 31 provided parallel to the geared shaft 30 by a gear transmission device that can selectively transmit transmission in three stages.

That is, the geared shaft 30 has a large gear 32 and a medium gear 3.
3. A small gear 34 is attached to the shaft, and the transmission shaft 31 has a small gear 35 and a medium gear 36 that are integrally formed.
is slidably provided by spline fitting.
Further, the large gear 37 is rotatably fitted onto the transmission shaft 31, and the large gear 37 and the middle gear 36 are each provided with a clutch pawl on their opposing surfaces, so that the two can be freely engaged and disengaged by sliding the middle gear 36. It is becoming. The small gear 34 of the geared shaft 30 and the large gear 37 of the transmission shaft 31 are always in mesh with each other, and the spaces between the middle gear 33 and the middle gear 36 and between the large gear 32 and the small gear 35 are freely engageable and disengageable. It's summery.

A small bevel gear 38 pivotally attached to the end of the speed change shaft 31
is a large bevel gear 39 provided on the protrusion of the handling cylinder shaft 9a.
The handling cylinder shaft 9a is thereby transmitted to be decelerated. . The end of the outer tube 40 of the handling barrel shaft 9a that protrudes from the gear case 26 is screwed onto the rear wall 12 of the handling chamber 10 with bolts 41.

A small gear 42 provided on the geared shaft 30 is connected to the intermediate shaft 4
The sorting unit output shaft 4
5, and the oscillating sorting body 23,
Power is transmitted to a sorting section such as a winch 19. On the other hand, the gear 47 provided on the intermediate shaft 43 is connected to a claw gear 50 rotatably fitted onto the torque limiter shaft 49 via a gear 48 rotatably fitted onto the geared shaft 30. The claw gear 50 is connected to the torque limiter shaft 49 via a torque limiter 51 that is in pressure contact with the claw gear 50. . The gear 52 provided on the torque limiter shaft 49 is further connected to a chain main shaft 54 for driving the feed chain 13 and the straw removal chain 14 via an intermediate gear 53 and the like.

The above-mentioned series of gear transmission mechanisms are housed in a single gear case 26, and the gear transmission is performed between parallel shafts 30 and 31 provided in the lateral direction of the aircraft body, and this part rotates at high speed. Therefore, since the transmission torque is small, the gears used here can be small, and large and small bevel gears 38 and 39 can be used.
is provided after the transmission, and has the function of reducing speed without using a separate reduction gear. Therefore, the gear case 26 is formed into a horizontally long and compact shape, and is located at the rear of the fourth port 5 away from the grain culm discharge port 12a of the rear wall 12, near the feed chain 13, and is located near the feed chain 13. It is easy to attach to the output shaft 45 for the sorting section, etc.
etc., so that there is no need to protrude sideways for a long time.

The chain main shaft 54 for chain transmission is provided at the upper part of the gear case 26, and the sorting section output shaft 45 is provided at the lower part of the gear case 26.
The actual width in the front-rear direction is narrow.

The present invention is constructed as described above, and the power of the engine 8 is transmitted to the input shaft 27 via the belt 28 and the input pulley 27a, and the geared shaft 30 rotates integrally with the input shaft 27 by the coupling 29. Here, when cutting beer wheat, when the intermediate gear 36 of the transmission shaft 31 is operated to engage with the large gear 37, the transmission shaft 31 is interlocked with the input shaft 27, and the transmission is performed via the reduction bevel gears 38, 39. The handling barrel shaft 9a is driven to rotate at a low speed suitable for beer barley. When harvesting wheat, when the small gear 35 of the transmission shaft 31 is shifted and engaged with the large gear 32 (at this time, the claw engagement between the large gear 37 and the middle gear 36 is released), the handling barrel shaft 9a High speed rotation for wheat can be obtained, and medium speed rotation for rice can be obtained by meshing the middle gear 36 and the middle gear 33. .

In addition, the power to the sorting section consisting of the oscillating sorting body 23 and the like is transmitted from the small gear 42 of the geared shaft 30 to the intermediate gear 4.
4, through gear 46 and the like. On the other hand, the power transmission to the feed chain 13, straw removal chain 14, etc. is as follows.
The torque is transmitted from the intermediate shaft 43 through a torque limiter shaft 49, etc., and if there is an overload on the chain, the torque limiter 51 is activated and the power transmission is cut off.

The grain culm supplied by the feed chain 13 is threshed in the handling room 10 and sent to the grain culm discharge port 12.
The straw is discharged from a to the fourth port 15, and the straw is further discharged from the straw discharge chain 1.
4, transferred to the rear, cut by a cutter 17, and discharged. In the above series of actions, the handling room 10
Some of the straw waste and grains generated inside the grain culm discharge port 12a become part of the grains and scattered grains and fly out from the grain culm discharge port 12a to the fourth port 15, but as mentioned above, the gear case 26 is formed to be small. It is rare for grains and scattered grains to accumulate on the gear case 26, and furthermore, the scattered grains from the grain culm discharge port 12a are naturally removed from the handling chamber 1.
The main body of the gear case 26 is located at the rear of the fourth exit, and near the rear wall 12 there is an outer tube 40 of the thin handling trunk shaft 9a in the longitudinal direction of the aircraft. A wide space is formed by just doing this, and the falling objects are not prevented from falling and quickly fall onto the oscillating sorting body 23 and are sorted.

The present invention is a top-handling threshing system in which the input shaft, which is installed to drive each part of the threshing machine such as the handling drum and sorting section, is supported at the rear of the handling room and in front of the dust removal chamber in a direction perpendicular to the handling drum axis. In the machine, the input shaft and a speed change shaft provided parallel to the input shaft are connected by a transmission device capable of selectively changing speed transmission, and the input shaft is operated from the output side of the speed change shaft via a pair of reduction bevel gears. Since the structure is configured to drive the cylinder shaft, and only the handling cylinder can be shifted by operating the above-mentioned transmission device, the gears need be smaller compared to conventional transmissions that rotate the handling cylinder, and the bevel gear is easy to shift. Since the device was used for both direction change and deceleration after the device, the entire transmission device could be made horizontally long and compact without the need for a separate deceleration device. During the conveyance of the culm, debris that falls may accumulate on top of the culm and prevent the culm from being discharged, or they may solidify and fall on the oscillating sorter, impairing sorting or causing clogging. It eliminates defects such as

Furthermore, since the handling cylinder speed is changed independently, practical effects such as extremely easy adjustment to the optimal rotation speed for the grain to be threshed are achieved.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of a combine equipped with the device of the present invention, in which Figure 1 is an overall side view, Figure 2 is a sectional side view of the threshing machine, and Figure 3 is a cross-sectional side view of the threshing machine. FIG. 4 is a partially cutaway plan sectional view, FIG. 4 is a plan sectional view of the main part, and FIG. 5 is an explanatory diagram showing the transmission system of the thresher. FIG. 6 is an explanatory plan view showing a target example. 9... handling cylinder, 9a... handling cylinder axis, 12... rear wall,
12a... Grain culm discharge port, 15... Fourth port, 16...
...Dust exhaust chamber, 26... Gear case, 27... Input shaft, 30... Geared shaft, 31... Speed change shaft, 38...
...Small bevel gear, 39...Large bevel gear.

Claims (1)

[Scope of utility model registration request] In a top handling type threshing machine, an input shaft installed to drive each part of the threshing machine such as a handling drum and a sorting section is supported at the rear of the handling room and in front of the dust removal chamber in a direction perpendicular to the handling drum shaft. A transmission shaft provided parallel to the input shaft is connected by a transmission device capable of selectively changing speed transmission, and the handling barrel shaft is driven from the output side of the transmission shaft via a pair of reduction bevel gears. A transmission device for an overhandling type threshing machine, characterized in that only the handling drum can be changed in speed by operating the transmission device.