JPH067020A - Structure for driving of combine harvester - Google Patents

Abstract

PURPOSE:To obtain a structure for driving capable of simplifying the structure for driving a threshing feed chain while maintaining the feed chain at a constant speed even in the case of travel at a ultralow speed. CONSTITUTION:The objective structure for driving of a combine harvester is obtained by installing a reaping pretreating part 6 equipped with a reaper 4 for reaping planted stand grain culms and a conveyor 5 for conveying the reaped grain culms to a threshing feed chain 20 in front of a machine body, simultaneously providing the first transmission system 21 for transmitting power from an engine 9 to the reaping pretreating part 6 and the second transmission system 27 for transmitting the power to a thresher 7, interlocking and connecting the threshing feed chain 20 through a one-way clutch 28 for synchronizing the car speed to the first transmission system 21, interlocking and connecting the threshing feed chain 21 through a one-way clutch 29 for a constant speed to the second transmission system 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention equips the front part of a machine with a mowing pretreatment section equipped with a mowing device for mowing planted grain culms and a conveying device for conveying the mowing grain culms to a threshing feed chain. The present invention relates to a combine drive structure including a first transmission system that transmits power from an engine to the cutting pretreatment unit and a second transmission system that transmits power to a threshing device.

[0002]

2. Description of the Related Art Conventionally, as a drive structure for a combine of this type, for example, as disclosed in Japanese Utility Model Publication No. 56-129232, power for driving a threshing feed chain is supplied from a first transmission system. Was configured to only get.

[0003]

By the way, the drive of the mowing device and the carrying device of the mowing pretreatment section in the combine is as follows.
By increasing and decreasing the speed in synchronization with the driving of the traveling device, the grain culm posture at the time of mowing is maintained at a constant posture irrespective of the vehicle speed, and is smoothly moved to the transport device. . On the other hand, it is desirable that the threshing feed chain and the pre-mowing processing unit be synchronously driven so that the transfer of the harvested culm from the transport device to the threshing feed chain can be performed smoothly. And a one-way clutch (referred to as a first clutch) on the drive shaft for transmitting the output power from the mission case that drives and shifts the mowing pretreatment unit, and the transmission from the mission case to the mowing pretreatment unit is performed. A structure in which another one-way clutch (referred to as a second clutch) is interposed on the drive shaft in a state of being linked to a branch power transmission system branched from a transmission mechanism to the transmission case separately from the output transmission system. It was. With this structure, when the output power from the mission case is faster than the power driven at a constant low speed in the branch power transmission system,
Power is transmitted from the first clutch to the mowing pretreatment unit and the like, so that the traveling device, the mowing pretreatment unit and the threshing feed chain are synchronously driven, while the branch power transmission system is driven at a constant low speed. When the output power from the transmission case is slower than the power, the drive power from the branch power transmission system is transmitted to the pre-cutting processing section through the second clutch, and the vehicle speed is reduced. Even at very low speeds, the pre-cutting section and the threshing feed chain were kept running at a constant speed. By the way, the reason for driving the cutting pretreatment unit and the threshing feed chain at a constant speed even when traveling at an extremely low speed is:
This is because it is necessary to drive the threshing feed chain at least at a certain speed or more so as to avoid that the handling action of the handling teeth of the handling cylinder cannot be sufficiently received during the threshing process while moving the grain culm. However, as a structure for this purpose, it was realized by separately providing a branch power transmission system. Therefore, the structure of the branch power transmission system is complicated and the cost is increased, and a simpler structure has been demanded. The present invention has been made in view of the above circumstances, and provides a combine drive structure capable of simplifying a structure for driving a threshing feed chain at a constant speed even when traveling at an extremely low speed. To aim.

[0004]

In order to achieve the above-mentioned object, a combine drive structure according to the present invention has the structure described in the introduction, wherein the threshing feed chain is connected via a one-way clutch for vehicle speed synchronization. In addition to being linked to the first transmission system, the threshing feed chain is linked to the second transmission system via a constant speed one-way clutch. Operation by this characteristic configuration
The effects are as follows.

[0005]

In other words, the threshing feed chain can be driven from the second transmission system, which transmits power to the threshing device originally provided in the machine body, via the one-way clutch for constant speed, and the pre-mowing processing section Since the threshing feed chain can be driven from the driven first transmission system via the one-way clutch for vehicle speed synchronization, when the vehicle speed is higher than the predetermined speed, the first transmission system is the second transmission system. Since the speed is higher, the threshing feed chain is driven from the one-way clutch for vehicle speed synchronization and driven in synchronization with the vehicle speed and the pre-mowing processing unit. When the vehicle speed is lower than the predetermined speed, the first transmission Since the system has a lower speed than the second transmission system, the threshing feed chain is driven while being transmitted from the constant speed one-way clutch and maintained at a predetermined speed.

[0006]

Therefore, the drive system for maintaining the threshing feed chain at the predetermined speed even when the vehicle speed is low can be obtained by utilizing the transmission system to the threshing device originally provided in the machine body. It is not necessary to provide a system, the structure is simplified, and the cost can be reduced.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows the combine. The combine is a raising device 3 for raising and exerting an action on a grain culvert, and a reaping device for mowing the grain culm in the raised state, in front of a machine body frame 2 supported by a pair of left and right crawler type traveling devices 1, 1. 4. A pre-removal processing unit 6 including a transport device 5 for transporting the harvested grain culm to the rear of the machine is provided so as to be vertically swingable around the horizontal axis, and the machine frame 2 is used for threshing the harvested grain culm. A threshing device 7, a control unit 8 and the like are mounted and configured. Then, the engine 9 and the like are arranged below the control seat 8a of the control unit 8, and the output power from the engine 9 is used for the pre-mowing processing unit 6, the threshing device 7, and the crawler type traveling device 1,
1 is driven.

Next, the structure for transmitting power from the engine 9 will be described. As shown in FIG. 1, the rotation output of the engine 9 is transmitted to a hydrostatic stepless transmission 11 via a transmission belt 10, and an output shaft 11a from the hydrostatic stepless transmission 11 is a transmission mission case. The crawler type traveling devices 1 and 1 which are interlocked with the input portion of 12 and interlocked with the output shaft of the traveling mission case 12 are driven. Here, the driving speed of the crawler traveling devices 1 and 1 is changed by changing the speed of the hydrostatic continuously variable transmission 11 to change the vehicle speed. Further, the transmission belt 10, the transmission belt 13 wound around the output shaft 11a of the hydrostatic stepless transmission 11, and the pre-cutting processing section frame 1 including the transmission case of the pre-cutting processing section 6.
4, a pretreatment section drive shaft 15, a transmission belt 16 wound around the end of the pretreatment section drive shaft 15 opposite to the side around which the transmission belt 13 of the pretreatment section drive shaft 15 is wound, and rotary transmission shafts 17 and 18 Further, the feed chain drive mission 19 constitutes a first transmission system 21 to the threshing feed chain 20 which is held and conveyed for the threshing process by receiving the cut culm conveyed by the conveying device 5. That is, the transmission belt 13 transmits the turning force of the output shaft 11a to the pretreatment unit drive shaft 15, the pretreatment unit drive shaft 15 transmits it to the raising device 3 and the cutting device 4 via the transmission shaft 22, and , The transmission belt 16 transmits the rotational force of the pretreatment section drive shaft 15 to the rotary transmission shaft 17, and the first transmission system 21 transmits the output of the engine 9 to the conveyance device 5 via the transmission shaft 23. It is transmitted as a driving force to the raising device 3, the mowing device 4, the transport device 5, and the threshing feed chain 20 of the mowing pretreatment unit 6 via the hydrostatic continuously variable transmission 11.

Further, as shown in FIG. 1, the rotation output of the engine 9 is transmitted through a transmission belt 24 to a threshing mission 25,
The transmission belt 26 and the rotary transmission shafts 17 and 18 constitute a second transmission system 27 that transmits the threshing feed chain 20. That is, the threshing mission 25 inputs the engine output by the transmission belt 24, and the transmission belt 26
By transmitting the rotational force of the output shaft 25a of the threshing mission 25 to the rotary transmission shaft 17, the second transmission system 27 does not pass the rotary output of the engine 9 through the hydrostatic stepless transmission 11 and the preprocessing unit 6. It is transmitted to the threshing feed chain 20 as a driving force.

Then, as shown in FIG. 1, the transmission belt 1
Between the driven pulley 16b in which 6 is stretched and the rotary transmission shaft 17, the transmission from the rotary transmission shaft 17 to the driven pulley 16b is blocked, and only the normal rotation transmission from the driven pulley 16b to the rotary transmission shaft 17 is transmitted. The one-way clutch 28 for vehicle speed synchronization is provided, and the rotary transmission shaft 1 is provided between the driven pulley 26b on which the transmission belt 26 is stretched and the rotary transmission shaft 17.
A constant speed one-way clutch 29 is provided to block the transmission from the driven pulley 26b to the driven pulley 26b and to transmit only the forward rotation transmission from the driven pulley 26b to the rotary transmission shaft 17. In the figure,
Reference numerals 13a, 16a, 24a, and 26a are tension wheels of the transmission belts 13, 16, 24, and 26, respectively, and 10a is a tension clutch wheel of the transmission belt 10, and 30 is a non-illustrated Karako or cereal. This is a transmission system for driving a grain collecting device and the like.

Then, as shown in FIG. 3, the second transmission system 2
When the drive speed of the rotary transmission shaft 17 by 7 is a preset vehicle speed, the rotation transmission shaft 17 by the first transmission system 21
The second transmission system 27 is always driven at a constant speed in a state where it is equal to the driving speed of. Accordingly, when the vehicle speed is equal to or higher than the set speed, the rotation transmission shaft 17
Since the drive speed of the first transmission system 21 is higher than the drive speed of the second transmission system 27, the one-way clutch 2 for vehicle speed synchronization is provided.
The threshing feed chain 20 is driven by the power from the first transmission system 21 via 8, and the driving speed of the threshing feed chain 20 is synchronized with the vehicle speed and the driving speed of the pre-mowing processing unit 6 in a proportional relationship. It becomes a state. On the other hand, when the vehicle speed is slower than the set speed, the rotation transmission shaft 17
Since the drive speed of the second transmission system 27 is higher than the drive speed of the first transmission system 21, the threshing feed chain 20 is driven by the power from the second transmission system 27 via the constant speed one-way clutch 29. Therefore, the threshing feed chain 20 is driven at a constant speed (for example, 0.5 m / sec).

In the above embodiment, the output shaft 25a of the threshing mission 25 is rotationally driven at a constant speed.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a schematic system diagram showing a combine transmission system.

FIG. 2 is an overall side view showing a combine.

FIG. 3 is a graph showing the relationship between the vehicle speed, the threshing feed chain, and the pre-mowing processing unit.

[Explanation of Codes] 4 Harvesting device 5 Conveying device 6 Pre-harvesting processing unit 7 Threshing device 9 Engine 20 Threshing feed chain 21 1st transmission system 27 2nd transmission system 28 One-way clutch for vehicle speed synchronization 29 One-way clutch for constant speed

Claims (1)

[Claims] 1. A reaping device (4) for reaping planted grain culms,
A pre-cutting processing unit (6) equipped with a transfer device (5) for transferring the cut culm to the threshing feed chain (20) is provided on the front part of the machine body, and the pre-cutting processing unit from the engine (9) ( 6) A drive structure of a combine, comprising a first transmission system (21) for transmission to a threshing device (7) and a second transmission system (27) for transmission to a threshing device (7), the threshing feed chain ( 20) to the one-way clutch (2
8) is interlocked with the first transmission system (21), and the threshing feed chain (20) is connected to the second transmission system (2) via a constant speed one-way clutch (29).
The drive structure of the combine that is interlockingly connected to 7).