KR102145216B1 - Driving device for cutting protion of combine - Google Patents

Abstract

The present invention proposes a driving device capable of selectively performing a mowing operation for tuning vehicle speed and a separate constant speed mowing operation. The mowing unit driving apparatus of the present invention includes an engine 2 as a driving source; A transmission 6 that receives the output of the engine via HST; A counter shaft 110 that receives the output of the engine and rotates at a constant speed, and can be used for the work of a combine; An inner shaft 32 extending to the outside the shaft for shifting installed inside the transmission; A harvesting input shaft 37 for driving the harvesting unit; A first power transmission means for transmitting power from the inner shaft to the harvesting input shaft; A second power transmission means for transmitting power from the counter shaft to the harvesting input shaft; A first clutch 52 and a second clutch 54 respectively installed on the first power transmission means and the second power transmission means; And it consists of a first one-way clutch OW1) interposed between the first power transmission means and the inner shaft, and a second one-way clutch OW2 installed between the second power transmission means and the counter shaft. Here, the harvesting input shaft may be driven by at least one of the first power transmission means and the second power transmission means.

Description

Driving device for cutting protion of combine}

The present invention relates to a mowing unit driving apparatus of a combine, and more particularly, to a mowing unit driving apparatus of a combine configured to perform the driving of the mowing unit normally even in a low speed state or a stop state of the combine.

In the combine, it can be said that the mowing unit mows grain while driving, and the threshing unit threshes the grain from the mowed grain. In addition, since the power required to drive the mowing unit is related to the driving speed, it is common to control the output to have a proportional relationship with the driving power. However, in driving the combine, there are cases where the mowing unit must be operated regardless of the driving.

That is, in a state in which the combine is not traveling or in a state in which the combine is traveling very slowly, there are cases where a normal mowing operation is required. Korean Patent No. 10-158509 discloses a configuration configured to allow normal power to be transmitted to the mowing unit even in a stopped state to enable operation.

In the combine, the output of the engine is transmitted to the transmission through the HST, and the power for driving is output from the transmission, and the power is distributed from the transmission to the mowing unit at the same time. It is not easy to configure the mowing unit to output normal power regardless of the driving power, and at the same time, it may not be possible depending on the internal parts constituting the transmission. For example, in the case of a transmission in which a planetary gear reducer-type component is embedded, it is understood that it is almost impossible to produce a normal output from the transmission to the mowing part while not traveling.

An object of the present invention is to provide a combine capable of normally driving a mowing unit according to a user's selection regardless of the driving state of the combine.

Another object of the present invention is to provide a combine configured to sufficiently prevent damage to component parts for power transmission while allowing continuous power transmission without power interruption even when the drive source for driving the mowing unit is changed. can do.

The object of the present invention can be said to mean that, for example, the harvesting unit can be normally driven as needed even in a low-speed running, running, stopping, or reverse state of the combine.

The cutting unit driving apparatus of the present invention for achieving this object is; An engine having an output shaft in which a first driving pulley and a second driving pulley are installed; An HST having an HST input shaft receiving power from the first driving pulley through a belt; A transmission for receiving power through an output shaft of the HST and transmitting an output through a transmission means including an inner shaft to the axle; A first cutting unit driving pulley on an inner shaft extending to the outside of the transmission; A second driving pulley and a belt connected to receive power, a counter shaft pulley and a second cutting unit driving pulley installed, and a counter shaft installed to transmit power for work of the combine; In order to drive the mowing unit, a first mowing unit driven pulley receiving power from the first mowing unit driving pulley through a belt, and a second mowing unit driven pulley receiving power through the belt from the second mowing unit driving pulley are installed. Cutting input shaft; A first tension clutch installed on a belt connecting the first harvesting unit driving pulley and the first harvesting unit driven pulley and controlling power by adjusting a tension of the belt; A second tension clutch installed on a belt connecting the second reaping unit driving pulley and the second reaping unit driven pulley and configured to regulate power by adjusting the tension of the belt; The mowing input shaft can receive power by at least one of the first mowing unit driving pulley and the second mowing unit driving pulley, and a first one-way clutch is interposed between the first mowing unit driving pulley and the inner shaft, and the second example. It is characterized in that a second one-way clutch is interposed between the mounting drive pulley and the counter shaft.

According to another embodiment of the present invention, the rotation of the harvesting input shaft through the first harvesting unit driving pulley is synchronized with the driving speed of the combine, and the rotation of the harvesting input shaft through the second harvesting unit driving pulley has a constant speed.

According to another embodiment, the first tension clutch and the second tension clutch include a support link that is supported so that an inner end thereof is rotatable on one side of the combine, and is installed at an outer end of the support link to press a corresponding belt or a belt It is composed of control rollers separated from each other. And it is configured to further include a pair of drive motors for pulling or releasing the cable connected to the support link for the rotation of each support link.

Another embodiment of the drive device of the present invention; A transmission that receives the output of the engine via HST; A counter shaft that receives the output of the engine and rotates at a constant speed, and can be used for a work of a combine; An inner shaft that extends the shaft for shifting installed inside the transmission to the outside; A harvesting input shaft for driving the harvesting unit; A first power transmission means for transmitting power from the inner shaft to the harvesting input shaft; A second power transmission means for transmitting power from the counter shaft to the harvesting input shaft; A first clutch and a second clutch respectively installed in the first power transmission means and the second power transmission means; And it consists of a first one-way clutch interposed between the first power transmission means and the inner shaft, and a second one-way clutch installed between the second power transmission means and the counter shaft. Here, the harvesting input shaft may be driven by at least one of the first power transmission means and the second power transmission means.

It can be seen that according to the present invention having the above configuration, it is possible to selectively drive the harvesting unit through HST and transmission and the driving of the harvesting unit through the counter shaft, regardless of the internal specifications and functions of the transmission. I can. Therefore, according to the driving of the combine, it is possible to perform a mowing operation in the form of vehicle speed synchronization, and if the user wants, the desired mowing operation can be performed regardless of the driving state of the combine.

And according to the present invention, a first one-way clutch is provided between the inner shaft for transmitting power to the harvesting input shaft and the first cutting unit driving pulley, and the second one-way clutch is provided between the second cutting unit driving pulley and the counter shaft. Installed. By the configuration of each of these one-way clutches, even if power is simultaneously transmitted to the mowing input shaft, the other shaft, which is slower, can be sufficiently protected.

Other actions of the present invention other than that are considered to be sufficiently understood from the following description.

1 is a block diagram of a main part of a combine having a mowing unit driving device according to the present invention.
Figure 2 is an exemplary view showing an actual configuration example of the present invention cutting unit driving device.
3 is an exemplary view of a tension clutch applied to the present invention.
Figure 4 is an exemplary view showing a device for driving the tension clutch of the present invention.
5 is a block diagram for explaining the operation and control of the harvesting unit driving apparatus according to the present invention.

Next, the present invention will be described in more detail based on the embodiment shown in the drawings.

As shown in Fig. 1, two sets of driving pulleys 14 and 16 are installed on the output shaft 12 of the engine 2 of the combine. The first driving pulley 14 is for transmitting power to the HST input shaft 22, and the second driving pulley 16 is for transmitting power to the counter shaft 110. The power of the engine output shaft 12 is transmitted to the HST input shaft 22 by the belt Ba wound between the first driving pulley 14 and the HST driven pulley 24. Further, the rotational power of the engine 2 is transmitted to the counter shaft 110 by the belt Bb wound between the second driving pulley 16 and the counter shaft pulley 18.

Here, the power transmitted from the engine 2 to the HST 4 can be said to be primarily for driving the combine, and the power transmitted from the engine 2 to the counter shaft 110 can be said to be for work. And in the present invention, the counter shaft 110 is not the power transmitted from the engine 2 to the HST 4, but is a representative of the shaft that is separately branched from the engine 2 and transmits power for work (threshing, etc.). It can be, for example, a threshing shaft for driving a threshing device or a shaft for driving a wind tunnel, etc. will be understood as a concept including various types of shafts. The counter shaft 110 can be said to rotate at a constant speed by the power transmitted from the engine 2, and it can be said that it has a constant speed determined basically in a power transmission structure through a belt or the like.

In addition, as for the power input to the HST 4 through the HST input shaft 22, an output having a different direction and rotational speed is output through the HST output shaft 28 according to the driving of the swash plate inside the HST 4. Here, the HST output shaft 28 is an input shaft of the transmission 6 or is connected to the input shaft. The transmission 6 can be said to have various types of internal configurations and output conditions based thereon, which means that it has a transmission element (each configuration of the transmission means) including a plurality of shafts and gears for shifting. it means. The main output of the transmission 6 is transmitted to the axle 26 and used as the driving power of the combine.

Here, the output of the transmission 6 is transmitted to the cutting unit 120 through one of the shafts inside the transmission 6. In the present invention, the inner shaft 32 may be referred to as one intermediate shaft used as a shift in a transmission. One of the transmission internal shafts 32 is extended to the outside, and the power is transmitted to the cutting unit 120 by using the internal shaft 32. A first harvesting unit driving pulley 34 is installed at the outer end of the inner shaft 32, and a first harvesting unit driven pulley 36 is installed on the input shaft 37 of the harvesting unit 120. Install the belt (Bc). With this belt power transmission mechanism, power can be transmitted from the inner shaft 32 of the transmission to the driven pulley 36 of the first cutting unit.

Here, the internal shaft 32 can be said to be that power is transmitted via the HST (4), but since the HST (4) is controlled by the swash plate, the speed of the internal shaft 32 can be changed substantially. It can be said to be an axis that provides the vehicle speed-tuned rotational speed. Therefore, the inner shaft 32 is a shaft in which the number of rotations changes in synchronization with the vehicle speed of the combine, and generally the rotational speed of the mowing unit 120 is driven while being synchronized with the vehicle speed.

It can be said that the driving of the cutting unit 120 using the internal shaft 32 of the transmission 6 itself is general. In the case of driving the harvesting unit, the inner shaft 32 synchronized with the vehicle speed must have a sufficient rotational speed to drive the harvesting unit 120. For example, when the vehicle speed is low or reverse (reverse rotation of the inner shaft), or when the vehicle speed is stopped, the power of a sufficient rotational speed is not transmitted from the inner shaft 32 to the mowing input shaft 37, in this case. In this, the operation of the harvesting unit 120 is impossible.

In the present invention, even when the number of rotations of the inner shaft 32 of the transmission 6 is not sufficient, by transmitting a sufficient number of rotations forward (driving direction) power to the mowing unit 120 through another path, It is configured to enable the normal operation of the harvesting unit 120 anytime the user needs. In addition to the counter shaft pulley 18, the second cutting unit driving pulley 42 is installed on the counter shaft 110 described above. The second harvesting unit driving pulley 42 is connected to the second harvesting unit driven pulley 44 installed on the harvesting input shaft 37 through a belt Be.

Therefore, the rotational power in the engine 2 is through the counter shaft 110, the second cutting unit driving pulley 42, the belt (Be), and the second cutting unit driven pulley 44 through the cutting unit 120 It can be seen that it is configured so that power can be transmitted in the forward direction. Here, the rotational force transmitted to the harvesting input shaft 37 through the counter shaft 110 always has a predetermined rotational speed, and at least has a rotational speed capable of normally driving the harvesting unit 120.

As described above, according to the present invention, the first harvesting unit driven pulley 36 and the second harvesting unit driven pulley 44 are installed on the harvesting input shaft 37 for driving the harvesting unit. Therefore, it can be seen that it is configured to enable normal driving by the driven pulley 36 of the first harvesting unit or the driven pulley 44 of the second harvesting unit. However, since it is not preferable that the first mowing unit driven pulley 36 and the second mowing unit driven pulley 44 rotate at the same time, only one of them is configured so that the mowing input shaft 37 can be rotated normally.

In the present invention, a first one-way clutch OW1 is installed on the first cutting unit driving pulley 34 connected to the inner shaft 32. Here, the first one-way clutch OW1 itself is a known one in which only rotation in one direction is transmitted when the rotational force is transmitted from the shaft to the pulley. The first one-way clutch OW1, when the inner shaft 32 rotates in the forward direction (forward travel direction and the rotation direction of the normal mowing unit), transmits this rotational force to the first harvesting unit driving pulley 34, and When the shaft 32 rotates in the reverse direction, the first cutting unit driving pulley 34 does not rotate. With the configuration of the first one-way clutch OW1 as described above, the first harvesting unit driving pulley 34 does not transmit power to the harvesting input shaft 37 except for a normal rotation direction.

In addition, a second one-way clutch OW2 is installed between the counter shaft 110 and the second cutting unit driving pulley 42. This second one-way clutch OW2 also performs the same function. When the counter shaft 110 rotates in the direction (forward) driving the harvesting unit 120, the counter shaft 110 is rotated from the counter shaft 110 to the harvesting input shaft 37. It can transmit power, and it does not transmit power in the opposite direction.

In addition, a first tension clutch 52 is provided on the belt Bc that is wound between the first harvesting unit driving pulley 34 and the first harvesting unit driven pulley 36. In the present specification, the term “tension clutch” performs a function of controlling power transmission through the belt by using the tension of the belt, and may be referred to as a configuration conventionally used in the belt power transmission part of agricultural machinery. Therefore, when the first tension clutch 52 turns on the power transmission, the power is transmitted through the belt Bc, and when the first tension clutch 52 turns off the power transmission, the Power transmission through the belt Bc is blocked.

The first tension clutch 52 is installed to regulate power transmission through a belt Bc between the first reaping unit driving pulley 34 and the first reaping unit driven pulley 36, as discussed above. will be. Further, in the present invention, a second tension clutch 54 is installed between the second reaping unit driving pulley 42 and the second reaping unit driven pulley 44 in order to regulate power transmission through the belt Be. The configuration of the second tension clutch 54 is the same as that of the first tension clutch 52, and it can be said that the configuration is already widely used.

According to this configuration, the mowing drive shaft 37 can be rotated by driving any one of the first mowing part driven pulley 36 and the second mowing part driven pulley 44, where the first mowing part driven pulley ( It will be appreciated that whether or not rotation of the driven pulley 44 of the second cutting unit and 36) is rotated is determined by the first tension clutch 52 or the second tension clutch 54 described above. In summary, whether or not the harvesting input shaft 37 is operated, the harvesting input shaft 37 receives rotational power from the counter shaft 110 when the first tension clutch 52 is turned off, and the second tension clutch 54 is When it is off, it can be seen that power is transmitted from the inner shaft 32 of the transmission.

Here, although it is a known conventional configuration, the configuration and operation of the first tension clutch 52 and the second tension clutch 54 will be described. In addition, since the configuration and operation of the first tension clutch 52 and the second tension clutch 54 are substantially the same, only the second tension clutch 54 will be representatively described for convenience of description in FIG. 2.

2 and 3, the second tension clutch 54 has a control roller 54a in contact with the belt Be or spaced apart from the belt Be, and the control roller 54a is at an outer end. It is installed in the inner end is composed of a support link (54b) that is supported rotatably. In the illustrated embodiment, the support link 54b is rotatably supported at the center of the second cutting unit driving pulley 42.

Therefore, as can be seen in FIG. 2, when the support link 54b is pulled in the direction of the arrow B and the control roller 54a presses the belt Be, the tension of the belt increases and the second cutting unit driving pulley ( It is possible to transmit power between 42) and the second cutting unit driven pulley 44. On the contrary, when the support link 54b rotates in the direction of the arrow A, it is completely separated from the belt Be, and the tension of the belt is lowered. When the tension is reduced in this way, transmission of power between the second reaping unit driving pulley 42 and the second reaping unit driven pulley 44 becomes impossible. The driving principle and configuration of the tension clutches 52 and 54 themselves can be said to be widely used in the field of agricultural machinery.

The support link 54b of the tension clutch 54 having the above-described configuration can be rotated clockwise or counterclockwise by manual operation of the driver. However, for automation, it may be possible to configure the support link 54b to rotate using a motor. As can be seen from the embodiment shown in FIG. 4, the drive motor M is supported on one side of the frame of the combine, and the interlocking link 72 is coupled to the drive shaft Ms so as to rotate.

The interlocking link 72 rotates with a larger rotation radius of the coupling protrusion 74 at its outer end according to the forward or reverse rotation of the motor. The cable link 82 is coupled to the coupling protrusion 74 formed on the outer end of the interlocking link 72, for example, the coupling protrusion 74 is connected through the coupling hole 84 of the cable link. The cable Ca connected to the lower end of the cable link 82 is connected to the support link 54b of the second tension clutch 54.

Therefore, in the forward and reverse rotation of the drive shaft Ms by the drive of the drive motor M, the control roller 54a strengthens the tension of the belt Be by pulling the support link 54b through the cable Ca, or Ca) is released and the support link 54b is released so that the control roller 54a weakens the tension of the belt Be. Here, when the tension of the belt (Be) becomes strong, the power is transmitted in the closed state of the clutch, and when the tension is weakened, it is natural that the power is not transmitted in the open state of the clutch.

In the drive motor (M) in the present invention, by pulling or loosening the cable (Ca), by rotating the support link (54b) of the tension clutch, the control roller (54a) pressurizes the belt or is separated from the belt. It will be appreciated that certain members (eg cable links or support links) can be rotated so as to be able to.

As can be seen from the above description, in the mowing unit driving apparatus of the present invention, the mowing input shaft driving the mowing unit may selectively receive power from two routes, and the configuration for each power transmission includes a first tension clutch ( 52) and a second tension clutch 54 are installed. In addition, a pair of driving motors (M) for driving each tension clutch (52, 54) must be installed, and an operation switch or input button for inputting the driving of each tension clutch (52, 54) is also installed separately. Of course it should be. Further, the control unit is configured to control each driving motor M according to an input signal from an input unit (operation switch or input button) for operation of the tension clutches 52 and 54.

The cutting unit operating apparatus of the present invention uses a pair of tension clutches and a pair of one-way clutches, and the functions and actions of these components are summarized as follows. The first one-way clutch OW1 and the second one-way clutch OW2 are used to transmit power in a direction in which the mowing unit 120 performs a normal operation, and does not transmit power for rotation in the opposite direction. It has a function.

In addition, the first tension clutch 52 is controlled in an on (closed) state when the mowing unit 120 is driven by using the power of the inner shaft 32, and is controlled in an off (open) state otherwise. . Here, when the first tension clutch 52 is on, it is preferable to control the second tension clutch 54 to be off. In addition, when the power is transmitted to the cutting unit 120 through the second tension clutch 52, it is preferable to turn off the first tension clutch 52.

However, when it is necessary for driving or due to an operation mistake, the first tension clutch 52 and the second tension clutch 54 are turned on at the same time, so that the cutting input shaft 37 receives power from both sides. However, in this case, the cutting unit input shaft 37 is rotated by a power having a high rotational speed. At this time, for example, even if the rotational speed of the counter shaft 110 is slower than the rotational speed of the inner shaft 32, damage to the counter shaft 110 may be sufficiently prevented by the first one-way clutch OW2. In addition, when the tension clutches 52 and 54 on both sides are turned on at the same time in this way, even if the power transmission to the cutting unit input shaft 37 is changed, the cutting unit input shaft 37 can be continuously driven, so that the power is reduced. It will not be broken.

Referring to Figure 5, a brief look at the control of the harvesting unit driving apparatus of the present invention. An operation panel near the driver's seat of the combine is provided with a harvesting input unit 132 for operating the harvesting unit driving device of the present invention. The harvesting input unit 132 may include a first input unit 132A for manipulating the first tension clutch 52 and a second input unit 132B for manipulating the second tension clutch 54.

In addition, the control unit receiving the operation signal from the harvesting input unit 132 is a second driving motor M2 that operates the second tension clutch 54 (same as the driving motor M of Fig. 4) as mentioned above. Alternatively, the first driving motor M1 that operates the first tension clutch 52 is controlled. Here, the harvesting input unit 132 may be separately installed for the operation of each of the tension clutches 52 and 54, and both tension clutches 52 and 54 are preferably driven selectively. Of course it is also possible. In this case, the control unit 130 may sequentially transmit control signals for controlling both tension clutches 52 and 54 to each of the driving motors M1 and M2 according to a previously input control algorithm.

Next, the actual operation of the harvester driving apparatus of the present invention having the above configuration will be described.

While the combine is running normally, the harvesting unit 120 can perform the harvesting work of the grain. In this case, the harvesting input shaft 37 is powered from the first cutting unit driving pulley 34 connected to the inner shaft 32 of the transmission. Receive. Accordingly, the harvesting input shaft 37 operates the harvesting unit 120 with a rotational speed substantially synchronized with the vehicle speed.

In this process of operation, when the driving speed of the combine becomes low, the combine is stopped, or moves backward, it is difficult for the mowing unit 120 to operate normally. In this case, the operator cuts off the power of the first tension clutch 52 and connects the power of the second tension clutch 54 through the manipulation of the input unit. This manipulation is performed by the control unit 130 according to the manipulation signal of the harvesting input unit 132.

By the operation of the control unit 130 and the driving motors M1 and M2, the power through the first reaping unit driving pulley 34 is cut off, and the power through the second reaping unit driving pulley 42 is transferred to the reaping input shaft 37 ). As described above, the cutting input shaft 37 is a shaft that rotates at a set constant speed. Here, for operational reasons, both tension clutches 52 and 54 may be turned on at the same time. Even in this case, the power transmission portion can be sufficiently protected by the one-way clutches OW1 and OW2.

For example, in a state in which the tension clutches 52 and 54 are connected at the same time, the mowing input shaft 37 rotates according to the rotation speed of the counter shaft 110 even though the rotation speed of the counter shaft 110 is relatively high, At this time, the inner shaft 32 can be sufficiently protected because power is not transmitted by the first one-way clutch OW1. And conversely, in a state in which the tension clutches 52 and 54 are connected at the same time, the mowing input shaft 37 rotates according to the rotation speed of the inner shaft 32 even if the rotation speed of the inner shaft 32 is relatively high, At this time, the counter shaft 110 can be sufficiently protected because power is not transmitted by the second one-way clutch OW2.

As described above, in the present invention, the harvesting input shaft for driving the harvesting unit is sufficiently driven by either the vehicle speed-tuning rotational shaft (internal shaft) output through the transmission or the constant-speed rotational shaft (counter shaft) by output from the engine. It can be seen that the basic point is to organize it so that it can be done. In addition, it can be seen that the vehicle speed-tuning rotation shaft and the constant speed rotation shaft are connected to the pulley via a Wen-Way clutch, so that the mowing part can be continuously driven without stopping during power conversion as well as protection of components.

It goes without saying that other various modifications are possible for those skilled in the art within the scope of the basic technical idea of the present invention having the above configuration. In addition, it can be said that the scope of protection of the present invention should be interpreted based on the description of the claims.

2 ..... engine
4 ..... HST
6 ..... Transmission
12 ..... engine output shaft
14 ..... 1st driving pulley
16 ..... 2nd driving pulley
18 ..... counter shaft pulley
22 ..... HST input shaft
24 ..... HST driven pulley
34 ..... Driving pulley of the first cutting unit
36 ..... 1st cutting driven pulley
42 ..... Drive pulley of the second cutting unit
44 ..... 2nd cutting driven pulley
52 ..... 1st tension clutch
54 ..... 1st tension clutch
54a ..... control roller
54b ..... Support Link
110 ..... counter shaft
120 ..... Savings
OW1 ..... 1st One Way Clutch
OW2 ..... 2nd one-way clutch

Claims (4)

An engine having an output shaft in which a first driving pulley and a second driving pulley are installed;
An HST having an HST input shaft receiving power from the first driving pulley through a belt;
A transmission for receiving power through an output shaft of the HST and transmitting an output through a transmission means including an inner shaft to the axle;
A first cutting unit driving pulley installed on an inner shaft extending outward from the transmission;
A second driving pulley and a belt connected to receive power, a counter shaft pulley and a second cutting unit driving pulley installed, and a counter shaft installed to transmit power for the work of the combine;
The first driving pulley of the first harvesting unit that receives rotational power synchronized with the travel speed of the combine through the belt from the driving pulley of the first harvesting unit, and the second example of receiving constant-speed rotational power through the belt from the second harvesting unit driving pulley. Mowing input shaft with mounting driven pulley installed;
A first tension clutch installed on a belt connecting the first harvesting unit driving pulley and the first harvesting unit driven pulley and controlling power by adjusting a tension of the belt; And
A second tension clutch installed on a belt connecting the second reaping unit driving pulley and the second reaping unit driven pulley, and configured to regulate power by adjusting the tension of the belt;
The mowing input shaft can receive power by at least one of the first mowing unit driving pulley and the second mowing unit driving pulley, and a first one-way clutch is interposed between the first mowing unit driving pulley and the inner shaft. A cutting unit driving device for a combine, characterized in that a second one-way clutch is interposed between the mounting drive pulley and the counter shaft.
delete The method of claim 1,
The first tension clutch and the second tension clutch consist of a support link that is supported so that an inner end thereof can be rotated on one side of the combine, and a control roller that is installed on the outer end of the support link to pressurize a corresponding belt or spaced apart from the belt. Become;
For the rotation of each of the support links, a driving device for a harvesting part of a combine further comprising a pair of driving motors for pulling or releasing a cable connected to the support link.
Engine as a drive source;
A transmission that receives the output of the engine via HST;
A counter shaft that receives the output of the engine and rotates at a constant speed, and can be used for a work of a combine;
An inner shaft that extends the shaft for shifting installed inside the transmission to the outside;
A harvesting input shaft for driving the harvesting unit;
A first power transmission means for transmitting rotational power in synchronization with the traveling speed of the combine from the inner shaft to the harvesting input shaft;
A second power transmission means for transmitting rotational power at a constant speed from the counter shaft to the harvesting input shaft;
A first clutch and a second clutch respectively installed in the first power transmission means and the second power transmission means; And
A first one-way clutch interposed between the first power transmission means and the inner shaft, and a second one-way clutch installed between the second power transmission means and the counter shaft;
The mowing input shaft is a mowing unit driving device of a combine that can be driven by any one of a first power transmission means and a second power transmission means.

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