JPH0947135A - Transmission mechanism in combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmission mechanism in a combine harvester capable of smoothly conveying reaped grain culms conveyed from a reaping part and sufficiently threshing grain culms with a threshing cylinder. SOLUTION: This transmission mechanism in a combine harvester is obtained by transmitting a power from an engine E through an operation driving shaft 15 of a transmission 13 and driving a lifting up chain (3c) for relaying and feeding grain culms reaped with a reaping part 3 to a feed chain 8 of a thresher and a feed chain 8, interposingly installing a variable speed mechanism 80 between the operation driving shaft 15 for driving the feed chain 8 and a transmission shaft (8c) of the feed chain and linking the variable speed mechanism 80 to a car speed lever of the transmission 13 so as to carry out the variable speed change of the car speed lever to the low speed side when the car speed lever is operated to a high car speed region, in the combine harvester 1 capable of driving a mobile device and the reaping part 3 from the engine E through the transmission 13 and rotating and driving a threshing cylinder 9 of a thresher 4 with a separate transmission system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission mechanism in a combine, and more particularly to a power transmission mechanism for a feed chain and a power transmission mechanism for a handling cylinder of a thresher.

[0002]

2. Description of the Related Art Conventionally, a power transmission system for driving a mowing section and a threshing section mounted on a combine from an engine is generally known as a power transmission system in which a mowing section equipped with a lifting chain is transmitted from an engine via a transmission for driving a traveling device. In addition, the threshing section provided with the feed chain is configured to be transmitted by another transmission system independent of the above transmission system.

In a conventional transmission system, however, the combiner barrel is set and maintained at a constant threshing work rated speed during combine work, so that the feed chain transport speed is also rotated at a constant speed, and the machine speed is kept low. Since the cutting culms that are reaped and cut at high speed are transferred to the feed chain starting end through the lifting chain, especially at the time of low-speed cutting, the end of the lifting chain that rotates at low speed and the feed that rotates at high speed are fed. The start timing of the chain causes a shift in the timing of inheritance of the continuously transferred grain culms, and the feed chain pulls the grain culms early and carries them over. As a result, there was a problem in that there was a problem such as unhandled material and clogging during threshing work due to transport disturbances such as a delay in tip and leakage of culm.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation and was devised in order to solve the conventional inconveniences. The transfer speed of the chain and the feed chain can be synchronously rotated to smoothly transfer the harvested culms,
In the high-speed working range of the vehicle speed, the feed chain can be controlled to a predetermined speed so as not to rotate at an increased speed to prevent unhandled parts, and when a differential ratio type handle cylinder is further provided,
It is an object of the present invention to provide a power transmission mechanism in a combine that can perform high-precision threshing work by increasing the rotation speed of the rear handling cylinder in accordance with the transport speed when the feed chain transports the harvested culm at high speed. To do.

[0005]

In order to solve the above-mentioned problems, a first technical means adopted by the present invention is to drive a traveling device and a reaping unit from an engine mounted on a combine via a transmission and to separate transmission. In a combine that rotates and drives the barrel of the thresher by a system, the lifting chain that transfers the grain culm cut by the reaping section to the feed chain of the threshing machine and the feed chain are transmitted from the work drive shaft of the transmission. It is characterized in that it is configured to be driven, and the second means is to install a continuously variable transmission mechanism between a work drive shaft for driving the feed chain and the feed chain transmission shaft,
The continuously variable transmission on the vehicle speed lever of the transmission,
When the vehicle speed lever is operated in the vehicle speed / high speed range, the vehicle speed lever is linked so as to be continuously variable to the low speed side. The third technical means is the grain harvested by the harvesting unit. The lifting chain that continuously transfers the culm to the feed chain of the thresher and the feed chain are driven and driven from the work drive shaft of the transmission, and there is no space between the work drive shaft that drives the feed chain and the feed chain drive shaft. The stepless speed change mechanism is interposed, and the stepless speed change mechanism is connected to the vehicle speed lever of the transmission so that when the vehicle speed lever is operated in the high speed range of the vehicle speed, the stepless speed change mechanism is continuously changed to the low speed side. The handling barrel consists of a front handling barrel and a rear handling barrel that are rotated and transmitted from the handling barrel drive shaft at different speeds, and a continuously variable transmission mechanism is installed between the handling shaft of the rear handling barrel and the handling barrel drive shaft. Interposing and driving the above work There when rotated at high speed, the continuously variable transmission mechanism is operated in the high speed side and is characterized by being configured to rotate accelerating the rear threshing drum.

[0006]

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a crawler type traveling device 2
a cutting blade 3a and a raising device 3b from the front on the machine base 2 having a.
A threshing machine 4 equipped with a mowing unit 3 and a cutter 4a having the same, and a combiner in which a control unit 5 and a Glen tank 4b and the like are arranged from the front on the other side of the combiner 1, and the combiner 1 shown in FIG. The power transmission system having the feed chain power transmission mechanism 6 shown in FIG.

That is, in FIG. 2, the combine 1 is
The harvesting traveling transmission system S driven by the belt transmission mechanism from the engine E mounted in the proper place on the machine allows the transmission belt S to be transmitted.
1 continuously variable transmission (HST device in the embodiment)
The traveling device 2a is rotated by the traveling drive shaft 14 via the transmission casing 13 having the transmission 7, and the reaper 3 and the feed chain 8 are operated from the work drive shaft 15 and the threshing transmission system T causes a difference rate. The No. 1 spiral shaft 11, the swing selecting body 12, the cutter 4a and the like are operated via the mold handling cylinder 9 and the No. 2 spiral shaft 10.

[0008] In the above transmission system, the threshing machine 4 is adjusted by adjusting the handling depth of the grain culms cut by the cutting section 3 by the feed chain 8.
The lifting chain 3c to be fed to the handling room 4c of the
The gear transmission is performed from the cutting transmission shaft 3d, which is belt-transmitted from 5. Further, the feed chain 8 installed opposite to the slide rail 8a provided along the handling port (not shown) of the handling chamber 4c has a drive shaft 8b on the starting end side thereof as a work drive shaft 15 and a feed chain transmission shaft 8c. Said H configured between
The vehicle is driven via a continuously variable transmission mechanism 80 that is operated in a linked manner by a vehicle speed lever 7a that adjusts ST7.

That is, the continuously variable transmission mechanism 80 is shown in FIG.
As shown in FIG. 5, the speed change belt 81 stretched between the speed change pulley 15a and the speed change pulley 8d mounted on the work drive shaft 15 and the feed chain transmission shaft 8c is actuated so as to be variable in diameter by the rotation operation of the cam lever 82. As a result, a belt-type continuously variable transmission mechanism for continuously adjusting the rotation of the feed chain transmission shaft 8c is provided, and the cam lever 82 is provided on the engagement pin 7b provided on the vehicle speed lever 7a so as to be provided on the differential piece 70. The wire 72 is slidably supported by engaging the long hole 71 and is fixed to the other end of the wire 72. As a result, when the vehicle speed lever 7a is rotated about the fulcrum shaft 7c from the low speed range L indicated by the arrow to the high speed range H, the continuously variable transmission mechanism 80 is not operated in the low speed range L of the vehicle speed, and the constant speed change mechanism 80 does not operate. The feed chain 8 is driven at a high speed in conjunction with the vehicle speed by the HST 7, and the lift chain 3 is driven.
The conveyance speeds of c and the feed chain 8 are synchronized with each other so that the cut grain culms can be transferred smoothly.

Further, when the vehicle speed lever 7a is rotated to the high speed region H side from the state of the vehicle speed low speed region L, the engagement pin 7 is
When b moves in the long hole 71 and pulls the differential piece 70 in the same direction by the operation amount, the cam lever 8 is moved through the wire 72.
2 is differential, the continuously variable transmission 80 interlocks continuously with the feed chain transmission shaft 8c so as to rotate the feed chain transmission shaft 8c at a low speed, and the feed chain transmission shaft 8c is interlocked with the vehicle speed by the HST 7 to reach a predetermined conveyance speed or more. I try to regulate high speed. As a result, the culm can be smoothly transferred from the lifting chain 3c to the feed chain 8, and the unprocessed residue caused by the feed chain 8 passing the grain culm at high speed in the handling chamber 4c can be prevented. Highly accurate threshing can be performed.

On the other hand, the differential ratio type handling cylinder 9 is composed of a front handling cylinder 9a and a rear handling cylinder 9b, a low speed pulley 93 provided with each of the handling cylinder shafts 91 and 92 on a handling cylinder drive shaft 90, and a high speed pulley. Pulley 9
The rear handle barrel 9b is rotated at a high differential speed by driving the rear handle barrel 9b separately. Then, the rear handling body 9
A variable belt type continuously variable transmission mechanism 95 similar to the continuously variable transmission mechanism 80 is provided between the handle barrel shaft 92 and the handle barrel drive shaft 90 of b, and when the vehicle speed is operated in the high speed range H, The continuously variable transmission mechanism 95 is configured to be able to be operated toward the high speed shift side, which causes the rear handling barrel 9b to rotate at high speed to leave unhandled grain culms conveyed at high speed by the feed chain 8. I try to thresh so that there is no such thing.

In the combine having the above-mentioned transmission mechanism, the vehicle speed lever 7a increases the speed by interlocking the feed chain 8 with the vehicle speed in a low speed range within the allowable range of the long hole 71 of the differential piece 70, and Since it can be synchronized with the conveyance speed of the lifting chain 3c that is accelerated to, the grain culms that are conveyed in a thin layer with a small amount of harvested culm are lifted by the feeding chain 8c.
In the intermediary transfer section, it is possible to smoothly transfer without disturbing the transfer posture and to orderly supply into the handling chamber 4c to perform good threshing work.

Further, at the time of high-speed cutting of the vehicle speed, the feed chain 8 is interlocked with the vehicle speed by the continuously variable transmission mechanism 80 so as to prevent the feed chain 8 from increasing to a speed higher than a predetermined conveying speed. The handling room 4
The residence time of the transported grain culms in c can be sufficiently secured, and the threshing work can be favorably performed in a state in which unhandled grain is prevented.

At this time, the rear handling barrel 9b formed on the differential-ratio type handling barrel 9 is rotated at high speed through the continuously variable transmission mechanism 95, so that a large number of culm layers conveyed at high speed can be threshed. On the rear side of the handling chamber 4c where the resistance is relatively small, the rear handling barrel 9b that rotates at a high speed can impart a sufficient threshing action to efficiently perform highly accurate threshing work.

[0015]

As is apparent from the above description, according to the present invention, the transfer speed of the feed chain is synchronized with the conveying speed of the lifting chain during low speed traveling in response to the combine harvesting vehicle speed. Therefore, it is possible to smoothly transfer the culms to orderly feed the cut culms into the handling room, and to perform good threshing work. Further, in the vehicle speed and high speed range of the combine, the feed chain is suppressed to a predetermined speed through the continuously variable transmission mechanism, so that the unremoved cutting culm can be prevented and good threshing work can be performed, and the above suppression can be achieved. The operation can be easily performed by linking the operation with the operation of the vehicle speed lever. Furthermore, when the feed chain transports a large amount of harvested culms at high speed, the rear handling barrel that rotates at high speed corresponding to the transport speed of the grain culms that have been threshed by the front handling barrel prevents unhandled residue. Can thresh efficiently.

[Brief description of drawings]

FIG. 1 Side view of combine

[Fig.2] Transmission system diagram of combine harvester

FIG. 3 is a side view of a continuously variable transmission mechanism that drives a feed chain.

[Explanation of symbols]

 1 combine 2a traveling device 3 mowing section 3c lifting chain 4 threshing section 7 threshing section 7 continuously variable transmission (HST) 7a vehicle speed lever 8 feed chain 8c feed chain transmission shaft 80 continuously variable transmission mechanism 9 handling body 9a front handling body 9b rear handling Body 90 Handle barrel drive shaft 91 Front handle barrel shaft 92 Rear handle barrel shaft 95 Continuously variable transmission mechanism 13 Transmission casing 14 Travel drive shaft 15 Work drive shaft

Claims (3)

[Claims] 1. A combine for driving a traveling device and a cutting unit from an engine mounted on a combine via a transmission, and rotating a handling cylinder of a threshing machine by a separate transmission system, wherein the grain culm is cut by the cutting unit. A transmission mechanism in a combine, characterized in that it is configured to drive and drive a lifting chain that continuously transfers the feed chain to a feed chain of a thresher, and the feed chain from a work drive shaft of a transmission. 2. A continuously variable transmission mechanism is provided between a work drive shaft for driving the feed chain and the feed chain transmission shaft, and the continuously variable transmission mechanism is used as a vehicle speed lever of a transmission, and the vehicle speed lever is used as a vehicle speed. The transmission mechanism in a combine according to claim 1, wherein the transmission mechanism is continuously linked to the low speed side when operated in a high speed range. 3. A combine for driving a traveling device and a mowing unit from an engine mounted on a combine via a transmission, and for rotating a handling cylinder of a thresher by a separate transmission system so that the grain culm cut by the mowing unit. And a feed chain from the work drive shaft of the transmission to drive the feed chain to the feed chain of the thresher, and a stepless drive between the work drive shaft and the feed chain drive shaft driving the feed chain. A variable speed mechanism is interposed, and the continuously variable speed change mechanism is connected to the vehicle speed lever of the transmission so that when the vehicle speed lever is operated in the high speed range of the vehicle speed, the variable speed mechanism is continuously changed to the low speed side. The cylinder is composed of a front cylinder and a rear cylinder, which are rotationally transmitted from the cylinder drive shaft with different speeds, respectively. A continuously variable transmission mechanism is interposed between the movable shaft and the work drive shaft, and when the work drive shaft is rotated at a high speed, the continuously variable transmission mechanism is operated to a high speed side so that the rear handling cylinder is rotated at an increased speed. A transmission mechanism in a combine characterized by the following.