JPH0444040Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Field of industrial application) This invention is a power transmission device for a combine harvester, specifically, a power transmission device for a combine harvester, which transmits the rotational power of an engine mounted on the machine base to a traveling crawler, a threshing section, and a reaping section, respectively. The present invention relates to a power transmission device.

(Prior Art) Generally, in the case of a combine harvester, a threshing section is mounted on the upper part of a machine base equipped with a traveling crawler at the bottom, and a reaping section is provided at the front of the machine base, while a harvester is mounted on the machine base. The engine is interlocked and connected to the traveling crawler, the threshing section, and the reaping section, respectively,
As the engine is driven, rotational power is transmitted to the traveling crawler, the threshing section, and the reaping section, respectively, so that the reaping and threshing work is performed.

In order to transmit the rotational power of the engine to the traveling crawler, the threshing section, and the reaping section, conventionally, a plurality of transmission pulleys are attached to the output shaft extending from the engine, and each pulley is connected to the The rotating power from the traveling crawler, threshing section, and reaping section is directly extracted.

(Problems to be solved by the invention) By the way, regarding the above-mentioned combine harvester,
Although the type of the engine may be changed, in the conventional power transmission device, a plurality of transmission pulleys are attached to the output shaft of the engine, and each pulley connects to the traveling crawler, threshing section, and reaping section. Because the rotational power is taken out directly,
When changing the engine type, it is necessary to replace all of the transmission pulleys on the output shaft and the transmission belts attached to each pulley, which is a very troublesome and difficult task. .

The present invention was devised in view of the above-mentioned problems, and its purpose is to provide a counter shaft that is linked to the output shaft of the engine, and to transmit rotational power to the traveling crawler, threshing section, and reaping section on the counter shaft. By providing transmission pulleys for transmitting a It is an extremely simple operation that only requires replacing the pulley installed on the output shaft without replacing the transmission belt that is hung on the pulley.
While the type of the engine can be easily changed, the power from the countershaft to the transmission of the traveling device can be continuously changed through a continuously variable transmission having a hydraulic movement mechanism, and furthermore, The hydraulic moving mechanism of the continuously variable transmission can be easily maintained at the shaft end of the counter shaft, and the transmission path from the continuously variable transmission to the transmission and from the transmission pulley can be easily maintained. To provide a power transmission device that can be rationally arranged in accordance with the arrangement of the threshing section, the reaping section, and the transmission, in which a transmission path for transmitting to each drive system of the threshing section and the reaping section is provided in the machine body. It is in.

(Means for solving the problem) The power transmission device for a combine harvester according to the present invention has the following features:
It is configured as shown in Figures 1 to 6.
In a power transmission device for a combine harvester that transmits rotational power of an engine 2 mounted on a machine stand 1 to a traveling crawler 3, a threshing section 4, and a reaping section 5, the machine stand 1
A transmission band 6b is provided between the axially inner side of the counter shaft 6 and the output shaft 2a, supporting a counter shaft 6 that is parallel to the output shaft 2a of the engine 2 and extending in the width direction of the machine base 1. A movable sheave 8 is provided on the outside of the counter shaft 6 in the axial direction to interlock the counter shaft 6 with the output shaft 2a.
The fixed sheave 82 of the driving pulley 8 in the continuously variable transmission 11 is composed of a driving pulley 8 having fixed sheaves 82, 92, a driven pulley 9, and a belt 10. is provided with a hydraulic moving mechanism 83 that supports the movable sheave 81 in an axially movable manner and moves the movable sheave 81 in the axial direction to a position outside the movable sheave 81 on the counter shaft 6; A fixed sheave 92 and a movable sheave 91 of the driven pulley 9 are provided on the input shaft 7b of the transmission 7 having a drive shaft for the traveling crawler 3,
The belt 10 is hung between the driving pulley 8 and the driven pulley 9, and the input shaft 7b is interlocked with the counter shaft 6 via the continuously variable transmission 11, while the axial direction of the counter shaft 6 is Inside, there is a first angular drive system for the threshing section 4 and the reaping section 5.
and second transmission pulleys 12 and 13 are provided.

(Function) Therefore, the rotational power of the engine 2 is transmitted to the traveling crawler 3 via the continuously variable transmission 11 provided between the counter shaft 6 and the transmission 7.
The threshing section 4 is transmitted from the counter shaft 6 to the threshing section 4 via the first and second transmission pulleys 12 and 13 provided on the counter shaft 6.
and is transmitted to each drive system of the reaping section 5. Therefore, when changing the type of the engine 2, each transmission pulley 1 on the counter shaft 6
The type of engine 2 can be changed by simply replacing the transmission pulley on the engine 2 side without replacing parts 2, 13, etc.

Furthermore, since a continuously variable transmission 11 having a hydraulic moving mechanism 83 is provided between the counter shaft 6 and the transmission 7, the rotational power from the counter shaft 6 to the transmission 7 is continuously variable. A shaft for transmitting power from the output shaft 2a to the counter shaft 6 is provided on the inside of the counter shaft 6 in the axial direction, which is capable of changing speed and is supported parallel to the engine 2 and extends in the width direction of the machine base 1. In addition to disposing the transmission band 6b, a fixed sheave 82 of the drive pulley 8 in the continuously variable transmission 11 is fixed to the outside of the counter shaft 6 in the axial direction.
A movable sheave 81 is supported to be movable in the axial direction at an outer position of the movable sheave 81 on the counter shaft 6, and a hydraulic moving mechanism 83 is disposed on the outer position of the movable sheave 81 on the counter shaft 6.
, maintenance of the hydraulic moving mechanism 83 can be performed easily, and furthermore,
A continuously variable transmission 1 is disposed on the axially outer side of the counter shaft 6.
1 and the first and second transmission pulleys 12 and 13 are provided on the inner side in the axial direction and are arranged in a distributed manner. transmission path, and the first and second transmission pulleys 12, 13.
The transmission paths for transmitting the information from the threshing section 4 to the respective drive systems of the reaping section 5 can be rationally arranged in accordance with the arrangement of the threshing section 4, the reaping section 5, and the transmission 7 provided in the machine body 1. It is.

(Example) The power transmission device for a combine harvester according to the present invention will be described below with reference to an example shown in the drawings.

Figures 4 and 5 show a general-purpose combine harvester,
In the figure, reference numeral 1 denotes a machine base, on which an engine 2 is mounted on the rear upper part and on the right side in the direction of travel, and running crawlers 3 are provided on both sides of the lower part. Threshing section 4
Further, a reaping section 5 is provided in front of the machine stand 1, and the engine 2 is interlocked and connected to the traveling crawler 3, the threshing section 4, and the reaping section 5, so that as the engine 2 is driven, the traveling crawler 3,
Rotational power is transmitted to the threshing section 4 and the reaping section 5, respectively.

The reaping section 5 includes a grain header 51 and a transport chamber 52 for reaping grain rods extending from the header 51 toward the threshing section 4 side. A chain conveyor 56 is provided inside the transfer chamber 52, and the grain rods are scraped inward by the scraping reel 53 of the grain header 51 and harvested by the cutting blades 54. Sending the harvested grain rod into the transfer chamber 52 with the scraping drum 55,
The grains are transported into the transport chamber 52 to the threshing section 4 side by a chain conveyor 56.

Further, as shown in detail in FIG. 6, the threshing section 4 rotatably supports a screw-shaped handling cylinder 41 inside, and a sorting plate 42 is placed below the handling cylinder 41.
A swinging sorting device 42 consisting of a chaff sheave 42b, a sorting net 42c, etc. is swingably supported via a support arm 42d, and the first screw conveyor 4 is positioned below the swinging sorting device 42.
3 and a second screw conveyor 44, a sorting fan 45 and a suction fan 46 are respectively provided at the front and rear positions of the sorting device 42, and a pre-cleaning fan 47 is provided at the front position of the sorting device 42. It is set up.

The reaped grain rods thus harvested by the cutting blade 54 of the former reaping section 5 and conveyed and supplied into the threshing section 4 by the chain conveyor 56 in the conveying chamber 52 are
Threshing is carried out by the handling drum 41 in the threshing section 4, and sorting is carried out by the swinging sorting device 42, and the second grain of the processed products sorted by the sorting device 42 is processed by the second screw. The handling cylinder 41 is again passed through the return thrower 48 provided on the side of the conveyor 44.
The first grain is supplied from the first screw conveyor 43 to the grain tank T mounted on the machine platform 1 via the grain frying throat 49, and is stored therein. A lower auger 40a, a vertical auger 40b, and a discharge auger 4 provided in
It is taken out to the outside via 0c.

However, in the combine harvester as described above, from the engine 2 to the traveling crawler 3 and the threshing section 4,
In order to transmit power to the reaping section 5, the following structure was adopted.

That is, as is clear from FIG. 1, a counter shaft 6 parallel to the output shaft 2a of the engine 2 is supported on the machine base 1, and a driven pulley 6a is attached to the axially inner side of the counter shaft 6. A drive pulley 2b is attached to the output shaft 2a, and a transmission belt 6b is wound between the transmission pulleys 2b and 6a, so that rotational power is transmitted from the output shaft 2a of the engine 2 to the counter shaft 6. It is.

A transmission 7 having a drive shaft 7a for the traveling crawler 3 on both sides in the width direction is arranged near the counter shaft 6, and the input shaft 7b of the transmission 7 and the counter shaft 6 are connected in the axial direction. A driving pulley 8 and a driven pulley 9 are connected to the outside.
A continuously variable transmission 11 consisting of a transmission belt 10 extending between each of these pulleys 8 and 9 is interposed, and the power is transmitted from the engine 2 to the counter shaft 6 via the continuously variable transmission 11. Rotational power is transmitted to the transmission 7, and from the drive shaft 7a of the transmission 7 to the traveling crawler 3.

Drive pulley 8 that constitutes the continuously variable transmission 11
As shown in detail in FIG. 2, it consists of a fixed sheave 82 fixed on the counter shaft 6, and a movable sheave 81 provided slidably opposite to the fixed sheave 82 at an outer position of the fixed sheave 82. A hydraulic moving mechanism 83 is provided at a position outside the movable sheave 81 on the counter shaft 6 to move the movable sheave 81 in the axial direction and change the pulley ratio of the drive pulley 8. By moving the movable sheave 81 closer to and away from the fixed sheave 82 in step 83, the transmission belt 10 interposed between the sheaves 81 and 82 is moved in the radial direction, and the drive pulley 8 is moved away from the drive pulley 8. This is done as if changing the speed of the rotational power reaching the driven pulley 9 side.

The hydraulic moving mechanism 83 includes a ram 84 that is fitted and fixed on the counter shaft 6, and a ram 84 that is slidably fitted onto the ram 84 and has first and second pressure receiving surfaces 85a and 85b on both sides in the axial direction. Cylinder 85 formed with
is fixed to the ram 84 and the cylinder 85
Two first and second pressure pipes 85c and 85d for supplying and discharging oil are provided on both sides of the cylinder 85 in the axial direction, and pressure is supplied from the first pipe 85c into the cylinder 85. By supplying oil, the first pressure receiving surface 85a receives pressure, moves the cylinder 85 to the right in FIG. 2, and separates the movable sheave 81 from the fixed sheave 82. Second pipe 85
By supplying pressure oil into the cylinder 85 from d, the pressure is received by the second pressure receiving surface 85b, and the cylinder 85 is moved to the left in the figure, bringing the movable sheave 81 close to the fixed sheave 82. Do as you please.

A large-diameter stepped portion and a small-diameter stepped portion are formed on the outer peripheral surface of the ram 84 on both sides of the axially intermediate portion,
By inserting and fixing the dividing body 86 on the small-diameter stepped portion at the boundary with the large-diameter stepped portion, the pressure-receiving area of the first pressure-receiving surface 85a is made small, and the second pressure-receiving surface 85b The pressure receiving area of the cylinder 85 is large, and when the pressure oil supplied to the cylinder 85 is received by the first pressure receiving surface 85a, that is, when the cylinder 85 is moved to the right, the movable sheave 81 is moved to the right. When moving away from the fixed sheave 82, the first pressure receiving surface 85a with a small pressure receiving area
By receiving the pressure oil at the second pressure receiving surface 85, the cylinder 85, that is, the movable sheave 81 moves rightward at low speed, and the pressure oil is transferred to the second pressure receiving surface 85.
When receiving pressure at b, that is, when moving the cylinder 85 to the left and moving the movable sheave 81 toward the fixed sheave 82,
By receiving the pressure oil on the second pressure receiving surface 85b having a large pressure receiving area, the cylinder 85, that is, the movable sheave 81 is moved leftward at high speed.

Furthermore, the movable sheave 81 and the fixed sheave 82 are
A bearing body 81a is provided on the counter shaft 6, respectively.
The bearing body 82a on the fixed sheave 82 side is provided with a locking pawl 87 that can be engaged with the engagement groove 81b formed in the bearing body 81a on the movable sheave 81 side. By engaging the locking pawl 87 with the engagement groove 81b, relative rotation of the movable sheave 81 with respect to the fixed sheave 82 is prevented, and only movement of the movable sheave 81 in the axial direction is permitted.

Further, thrust bearings B ₁ and B ₂ are provided on both sides of the cylinder 85 in the axial direction, and one thrust bearing B ₁ supports the bearing body 81a of the movable sheave 81, and the other thrust bearing B 1 supports the bearing body 81a of the movable sheave 81. ₂ , by supporting the cylinder 85 on the counter shaft 6, the thrust load applied to the movable sheave 81 is received by the counter shaft 6 via each of the thrust bearings B ₁ and B ₂ . .

Further, the bearing body 81a on the side of the movable sheave 81 and the cylinder 85 are swingably connected via a pivot pin P, so that a bending force is applied to the movable sheave 81 by the transmission belt 10 or the like. When this occurs, the movable sheave 81 is swung around the pin P to prevent the bending force from reaching the cylinder 85, and to keep the cylinder 85 parallel to the ram 84. Hold the cylinder 86
The movement of the ram 84 with respect to the ram 84 is made smooth.

In FIG. 2, reference numeral 88 denotes an idling bearing provided at an intermediate position between the movable sheave 81 and the fixed sheave 82 and inward of the transmission belt 10, and the transmission belt 10 The transmission belt 10 is brought into contact with the bearing 88 when it reaches the radially inward position as it moves.

Further, as shown in detail in FIG. 3, the driven pulley 9 constituting the continuously variable transmission 11 includes a movable sheave 91 that is slidably provided on the input shaft 7b of the transmission 7 via a bearing body 91a. A fixed sheave 9 is integrally fixed onto the input shaft 7b via a bearing body 92a, facing the movable sheave 91.
2, the bearing body 9 on the side of the movable sheave 91
A plurality of support rods 93 are made to protrude from 1a so as to pass through the bearing body 92a on the fixed sheave 92 side,
A disk-shaped support plate 9 is provided at the protruding tip of each support rod 93.
4 is attached, and a spring 95 is interposed between the support plate 94 and the fixed sheave 92 to always bias the movable sheave 91 toward the fixed sheave 92.

In this way, the drive pulley 8 on the counter shaft 6 side
When the transmission belt 10, which is wound around the transmission belt 10, is moved radially inward and relaxed, the movable sheave 91 is brought close to the fixed sheave 92 by the spring 95, and each of these sheaves By moving the transmission belt 10 to the radially outward position of the drive pulley 8, the slack of the transmission belt 10 is absorbed and maintained in tension, and the transmission belt 10 is moved radially outward of the drive pulley 8. When moved in the direction, the movable sheave 91
is moved in a direction away from the fixed sheave 92 against the spring 95, and the transmission belt 10 is moved to a position radially inward of each of the sheaves 91 and 92.

In FIG. 3, reference numeral 96 denotes a cover body provided on the side of the fixed sheave 92 to cover the spring 95.

Furthermore, a driving pulley 8 constituting the continuously variable transmission 11 is located inside the counter shaft 6 in the axial direction.
A first transmission pulley 12 is provided integrally with the driven pulley 6a at a side position, and a second transmission pulley 13 is provided at the end of the counter shaft 6.

As shown in FIG. 1, the first transmission pulley 12 is operatively connected to the handling barrel 41 of the threshing section 4 through a plurality of pulleys and belts, and the rotation transmitted from the engine 2 to the counter shaft 6 Power is transmitted to the handling cylinder 4 via the first transmission pulley 12.
1. Further, the second transmission pulley 13 is connected to the second transmission pulley 13 via a plurality of pulleys and belts.
A lower auger 40a, a vertical auger 40b, and a discharge auger 40 provided in the grain storage tank T of the threshing section 4.
c are respectively interlocked and connected to form the counter shaft 6.
The rotational power transmitted to the second transmission pulley 1
3 through each of the augers 40a, 40b, 40c.
At the same time, the support arm 42d of the swing sorting device 42 provided in the threshing section 4 and the first screw conveyor are connected to the second power transmission pulley 13 through another power transmission path branching from the auger path. 43, a second screw conveyor 44, a sorting fan 45, a suction fan 46, a pre-cleaning fan 47, a return thrower 48, and a grain thrower 49 are interlocked to transfer the rotational power transmitted to the counter shaft 6 to the third A scraping reel 53 provided in the reaping section 5 is connected to the second transmission pulley 13 in a separate power transmission path branching from the auger path. The mowing blade 54, the scraping drum 55, and the chain conveyor 56 are interlocked to transfer the rotational power transmitted to the counter shaft 6 to the second transmission pulley 13.
The information will be communicated to each of the above-mentioned persons via the .

Furthermore, in the embodiment shown in FIG.
Apart from the drive system that drives the traveling crawler 3 from
A drive system is provided to drive the threshing section 4 and the reaping section 5, and threshing clutches C1 _{and 5} are provided so that the handling cylinder 41 in the threshing section 4 and the sorting device 42 can be driven separately. A selection clutch _C2 is provided.

Therefore, the sorting clutch C ₂ of said sorting device 42
If the handling cylinder 41 is turned off, even if the handling cylinder 41 rotates due to inertia after the drive of the handling cylinder 41 is turned off, the sorting device 42
The system is not driven by inertia, which prevents clogging of the secondary gutter. In addition, C ₃ is an auger clutch,
C ₄ is the reaper clutch.

Therefore, as described above, the counter shaft 6 is supported so as to be parallel to the engine 2 and extend in the width direction of the machine base 1, and the counter shaft 6 is
A transmission band 6b for transmitting power from the output shaft 2a to the counter shaft 6, and first and second transmission pulleys 12, 13 for transmitting power to the respective drive systems of the threshing section 4 and the reaping section 5 are arranged on the axially inner side of the Further, a fixed sheave 82 of the drive pulley 8 in the continuously variable transmission 11 is fixed to the axially outer side of the counter shaft 6, and a movable sheave 81 is movable in the axial direction to a position outside the fixed sheave 82. Since the hydraulic moving mechanism 83 is supported and disposed outside the movable sheave 81 on the counter shaft 6, the complex hydraulic moving mechanism 83 having hydraulic piping etc. is moved outside the counter shaft 6. The shaft end can be located near the side of the machine base 1, so that maintenance of the hydraulic moving mechanism 83 can be easily performed from the side of the machine base 1. counter shaft 6
The continuously variable transmission 11 is mounted on the axially outer side, and the first and second transmission pulleys 12 and 13 are mounted on one end side in the axial direction.
Since these are provided and arranged in a divided manner, this divided arrangement allows the transmission path from the continuously variable transmission 11 to the transmission 7 and the first transmission path to the transmission 7.
and the second transmission pulleys 12 and 13 to the threshing section 4
The transmission path for transmitting the information to each drive system of the reaping section 5 can be rationally arranged in accordance with the arrangement of the threshing section 4, the reaping section 5, and the transmission 7 provided in the machine body 1.

Further, as shown in FIGS. 4 and 5, the transmission 7 and the continuously variable transmission 11 are located behind the machine base 1 and on the right side in the direction of movement of the machine base 1, in other words, on the seat mounting side. They are centrally arranged in the same space close to the engine 2, and by doing so, the longitudinal balance of the machine base 1 is improved, and the space can be easily reinforced with reinforcing members. Therefore, the engine 2, transmission 7, and continuously variable transmission 11 installed in this space can be reliably protected. By centrally arranging them in the same space at the rear side of the machine stand 1, maintenance of each of them can be easily performed from the side of the machine stand 1.

(Effect of the invention) As explained above, in the power transmission device of the present invention, a counter shaft 6 is supported on the machine base 1, parallel to the output shaft 2a of the engine 2, and extending in the width direction of the machine base 1, A transmission band 6b is provided between the axially inner side of the counter shaft 6 and the output shaft 2a to interlock the counter shaft 6 with the output shaft 2a, and a movable sheave is provided on the axially outer side of the counter shaft 6. 81, 91 and fixed sheaves 82, 92, a driving pulley 8, a driven pulley 9, and a belt 10.
The fixed sheave 82 of the drive pulley 8 in the continuously variable transmission 11 is fixed, and the fixed sheave 82 is fixed.
The movable sheave 81 is axially movably supported at an outer position of 2, and on the counter shaft 6,
The movable sheave 8 is located outside the movable sheave 81.
A hydraulic moving mechanism 83 for moving the driven pulley 9 in the axial direction is provided, and a fixed sheave 92 of the driven pulley 9 is provided.
and the movable sheave 91 is connected to the input shaft 7b of the transmission 7 which has a drive shaft for the traveling crawler 3.
The belt 10 is hung between the driving pulley 8 and the driven pulley 9, and the input shaft 7b is interlocked with the counter shaft 6 via the continuously variable transmission 11. Since the first and second transmission pulleys 12 and 13 for transmitting power to the respective drive systems of the threshing section 4 and the reaping section 5 are provided on the inside of the counter shaft 6 in the axial direction, when the type of the engine 2 is changed, etc. The model of the engine can be easily changed by simply replacing the pulley provided on the output shaft 2a without replacing the transmission pulleys 12, 13 and the transmission belts hooked on the pulleys 12, 13. The counter shaft 6 is disposed parallel to the output shaft 2a and extends in the width direction of the machine base 1, and a continuously variable transmission is provided on the outside in the axial direction. The driving pulley 8 and the hydraulic moving mechanism 83 constituting the machine 11 are provided to provide a transmission system to the transmission 7, and the first and second transmission pulleys 12 and 13 are provided on the inner side in the axial direction. Since a transmission system for transmitting power from each of these pulleys 12 and 13 to each drive system to the threshing section 4 and the reaping section 5 is provided, each of these transmission systems can be connected to the arrangement of the transmission 7,
It can be rationally arranged in correspondence with the arrangement of the threshing section 4 and the reaping section 5.

Furthermore, the fixed sheave 82, the movable sheave 81, and the hydraulic moving mechanism 83 of the drive pulley 8 are sequentially arranged from the inside to the outside of the counter shaft 6 in the axial direction.
In other words, the hydraulic moving mechanism 83 requires connection of hydraulic piping and particularly requires maintenance.
is disposed axially outside the counter shaft 6, that is, at the outermost axial direction of the counter shaft 6 extending in the width direction of the machine base 1, so that the hydraulic moving mechanism 83 can be easily maintained in the width direction of the machine base 1. In addition, since the continuously variable transmission 11 is provided between the transmission 7 and the transmission 7, the rotational power to the transmission 11 can be continuously variable. It can be placed on one side of the machine stand 1 in the width direction.

Therefore, maintenance of the continuously variable transmission 11,
In particular, maintenance of the hydraulic moving mechanism 83 can be easily performed.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram illustrating a drive system showing one embodiment of the power transmission device of the present invention, Fig. 2 is an enlarged cross-sectional view of a drive pulley that constitutes a continuously variable transmission, and Fig. 3 shows a continuously variable transmission. FIG. 4 is a side view of a combine to which the power transmission device of the present invention is applied, FIG. 5 is a plan view thereof, and FIG. 6 is an enlarged side sectional view of the threshing section. DESCRIPTION OF SYMBOLS 1... Machine base, 2... Engine, 3... Traveling crawler, 4... Threshing section, 5... Reaping section, 6... Counter shaft, 7... Transmission, 8... Drive pulley, 81... ...Movable sheave, 82...Fixed sheave, 9...Driven pulley, 91...Movable sheave,
92...Fixed sheave, 10...Belt, 11...
Continuously variable transmission, 12...first transmission belt, 13...
Second power transmission belt.

Claims (1)

[Scope of utility model registration request] A power transmission device for a combine that transmits the rotational power of an engine 2 mounted on a machine stand 1 to a traveling crawler 3, a threshing section 4, and a reaping section 5, wherein the machine stand 1
A transmission band 6b is provided between the axially inner side of the counter shaft 6 and the output shaft 2a, supporting a counter shaft 6 that is parallel to the output shaft 2a of the engine 2 and extending in the width direction of the machine base 1. A movable sheave 8 is provided on the outside of the counter shaft 6 in the axial direction to interlock the counter shaft 6 with the output shaft 2a.
The fixed sheave 82 of the driving pulley 8 in the continuously variable transmission 11 is composed of a driving pulley 8 having fixed sheaves 82, 92, a driven pulley 9, and a belt 10. is provided with a hydraulic moving mechanism 83 that supports the movable sheave 81 in an axially movable manner and moves the movable sheave 81 in the axial direction to a position outside the movable sheave 81 on the counter shaft 6; A fixed sheave 92 and a movable sheave 91 of the driven pulley 9 are provided on the input shaft 7b of the transmission 7 having a drive shaft for the traveling crawler 3,
The belt 10 is hung between the driving pulley 8 and the driven pulley 9, and the input shaft 7b is interlocked with the counter shaft 6 via the continuously variable transmission 11, while the axial direction of the counter shaft 6 is On the inside, there is a first
A power transmission device for a combine harvester, characterized in that a second transmission pulley 12, 13 is provided.