JPH0965751A - Combine harvesting stop mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a reaping stopping mechanism of a combine harvester capable of reducing weight and cost and stopping the reaping part independently from a feed chain by arranging a limit clutch at the halfway of a reaping input shaft and driving the reaping part through the limit clutch. SOLUTION: A power from the engine is transmitted to a reaping input shaft 23 for driving a reaper and a feed chain is driven from the reaping input shaft 23 and a limit clutch 26 is arranged at the halfway of the reaping input shaft and the reaping part is driven through the limit clutch 26. Further, a bevel gear 36 is driven by engaging a claw part 26a of the limit clutch 26 with the claw part 36a of the bevel gear 36 and a reaping part driving shaft 11 is preferably driven through a bevel gear 11a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a stop mechanism for a combine harvester.

[0002]

2. Description of the Related Art A conventional drive structure for a harvesting section and a threshing section of a combine is one in which power from an engine is used to drive a threshing section apparatus or a sorting apparatus through a belt or the like, and the other is a mission through a belt or the like. The power was transmitted to the case, and power was transmitted from the mission case to the mowing device. Further, the feed chain that conveys the grain culms in the threshing unit was driven by being transmitted from the drive unit of the threshing / sorting device.

[0003]

However, in the conventional structure as described above, the drive system of the mowing unit and the feed chain are different, so that the transportation of the grain culms after mowing is performed by the mowing unit. There was a problem that it was difficult to synchronize the transport device and the feed chain.

[0004]

The problem to be solved by the present invention is as described above, and the means for solving this problem will be described below. That is, it is a combine that transmits the power from the engine to the mowing input shaft that drives the mowing device and drives the feed chain from this mowing input shaft, and arranges a limit clutch in the middle of this mowing input shaft. The cutting unit is configured to be driven via the clutch.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described. 1 is an overall side view of the combine, FIG. 2 is a side view of the mowing section, FIG. 3 is a plan view of the same, and FIG. 4 is a schematic plan view of transmitting power from the mowing input pulley to the feed chain.
5 is a schematic side view of the same, FIG. 6 is a front view of a main part of the cutting stop mechanism of the present invention, and FIG. 7 is a side view of the same.
FIG. 8 is a plan view of a cutting blade, FIG. 9 is a schematic plan view showing a drive stopping mechanism of a cutting blade alone, FIG. 10 is a schematic view showing a detection method of a sensor for detecting raising of grain stems, and FIG. It is a control block diagram for detecting a grain culm raising and stopping cutting blade drive.

First, an outline of the overall structure of the combine will be described with reference to FIG. The frame F is mounted on the crawler type traveling device G, and the threshing section B and the sorting section C are placed on one side of the left and right sides of the machine body, and the driver's seat D and the Glen tank E are placed on the other side on the frame F. The reaping unit A is located at the front of the threshing unit B and at the frontmost part of the machine body, and the grain culm conveying device is arranged at the reaping unit A toward the feed chain 9 of the threshing unit B. It is a thing. In addition, 10 of the threshing part B is a handling cylinder.

The transport structure in the reaper A will be described with reference to FIGS. 2 and 3. The combine in the present embodiment is 6-row cutting, the weeding board 19 is attached to the foremost part of the mowing section frame 20 of the mowing section A, and the raising device 1 for taking in the grain culm as a standing state is provided at the rear of the combine. It is installed in. Grain culms are raised by the raising device 1, scraped by the scraping belt 2, and the roots of the culms are cut by the cutting blade 3 as shown in FIG. Then, the grain culms cut by the cutting blade 3 are
The lower transfer devices 4L and 4R on the left and right sides hold the roots of the stocks, and the upper transfer devices 5L and 5R hold the tips, and the rear side of the transfer device is formed in a substantially "C" shape in plan view. It is configured to collect in places.

The driving of the cutting blade will be described. As shown in FIG. 8, a cutting blade drive shaft case 38 covering the cutting blade drive shaft 37 is pivotally connected to a cutting blade pulley 39, and an eccentric shaft 39 a arranged on the cutting blade pulley 39 is used for cutting. A blade crank 40 is pivotally connected, and a connecting rod 41 is connected to the cutting blade crank 40. Further, a cutting blade drive arm 44 having a substantially V-shaped plan view is pivotally connected to a plate 43 fixed to the cutting frame 42 at the rear of the cutting blade 3, and as shown in FIG. 3, the other end is pivotally connected to the connecting rod 41. When the cutting blade pulley 39 rotates, the cutting blade crank 40 pivotally connected to the eccentric shaft 39a cranks, and the cutting blade drive arm 44 interlockingly connected to the cutting blade crank 40 through the connecting rod 41. Is rotated to the left and right with the pivotal portion 44a as a fulcrum, and the cutting blade 3 pivotally connected to the cutting blade drive arm 44 swings to the left and right. A bevel gear 37c is fixed to the end of the cutting blade drive shaft 37, and a bevel gear 53 is fixed to the end of a raising drive shaft 53 that drives the raising device 1.
It is configured to mesh with a and transmit power to the raising drive shaft 53.

Further, in this embodiment, as shown in FIG. 8, a drive pulley 45 is pivotally connected to the cutting blade drive shaft case 38 midway above, and an arm member 47 for engaging a tension pulley 46 is pivoted. It is pivotally supported via a support pin 47a.
As shown in FIG. 9, a bevel gear 45a is formed at the lower end of the drive pulley 45, and the cutting blade drive shaft is driven from the cutting section drive shaft 11 as shown in FIG. 2 via the bevel gear 11b and the bevel gear 37a. The bevel gear 37b is fixed to the shaft 37 so that the bevel gear 37b is always driven. Then, the cutting blade pulley 39 and the drive pulley 4
A belt 57 is wound around 5.

The arm member 47 and the tension pulley 4
As shown in FIG. 9, an end portion 48a of a pivot arm 48 that pivotally connects the tension pulley 46 is pivotally supported and engaged with one end of the arm member 47. Further, one end of the wire 49 is locked to the other end of the arm member 47, the other end is locked to an eccentric shaft 50 arranged on the motor shaft Ma of the motor M, and a sensor 51 described later is turned on. Then, the motor M is operated, the wire 49 is pulled, the arm member 47 rotates about the pivot pin 47a as a fulcrum, the tension pulley 46 biases the belt 57 in the tension direction, and the drive pulley. The power is transmitted from 45 to the cutting blade pulley 39, the cutting blade 3 is driven, and the sensor 5
When 1 is turned off, the motor M stops and the wire 4
9 is loosened, and the belt 57 of the tension pulley 46 is
The urging force on the cutting blade pulley 39 is stopped and the cutting blade 3 is stopped.

Here, the sensor 51 is the same as that shown in FIG.
(Showing N state), it is fixed to the rear surface of the raising case of the raising apparatus 1 so as to be rotatable around the rotating portion 51a as a fulcrum. As shown in FIG. When T causes the grain culm K to be conveyed, the sensor 51 arranged in parallel with the tine T is turned downward to be turned on. As shown in FIG. 11, when the sensor 51 is turned on, the control means is turned on. A signal is sent to 52 to drive the motor M and cause the tension pulley 46 to move to the belt 5
It is configured to urge in the tension direction of 7. With such a configuration, conventionally, a technique in which a sensor bar detects the presence or absence of a grain culm to automatically turn on / off a clutch of a reaping unit (for example, Japanese Utility Model Laid-Open No. 56-80039).
Japanese Utility Model Publication No. 56-10335, JP-A-1-252221.
No. 4, etc.), but there is no clutch capable of independently turning on and off the cutting blade 3 only, and the cutting blade pulley 3
A flywheel was used for 9, but since it is a pulley, weight and cost can be reduced, and vibration and noise can be reduced.

The left upper transport device 5L is driven by the mowing section drive shaft 11 via a bevel gear. In the present embodiment, the right upper transfer device 5R is divided into two parts in the front-rear direction, and the rear part of the front upper transfer device 5Ra is disposed above the front part of the rear upper transfer device 5Rb. A drive shaft 5a is provided in the rear portion, and the drive shaft 5a is arranged so as to penetrate between the rear upper conveyance devices 5Rb. With this configuration, the distance between the mowing unit A and the driver's seat D can be shortened, the mowing work can be easily performed, and the upper conveying device 5R and the scraping belt 2 are provided with the upper conveying device. Since the 5R transport case is eliminated and the working position is higher than in the conventional case and can be projected forward, the right reaping can be taken in favorably and the total length can be shortened.

Further, the lower carrying device 4C and the upper carrying device 5C in the central part are constructed so as to meet at the rear parts of the left lower carrying device 4L and the upper carrying device 5L.
Then, the stocker side is held by the vertical transfer device 7 and the tips are held horizontally by the upper transfer device 5R while the standing grain culms are tilted horizontally, and the threshing part is passed through the auxiliary transfer device 8. It is inherited to the feed chain 9 of B. The vertical conveying device 7 is capable of adjusting the conveying angle, and by adjusting the angle, the grain culm gripping position on the feed chain 9 is determined and the handling depth is adjusted, but the handling depth is detected. Therefore, a handling depth detection sensor S is provided above the auxiliary transport device 8.

A method of driving the feed chain 9 will be described. As shown in FIG. 4, the reaping input pulley 22 is fixed to one end of the reaping input shaft 23, and the bevel gear 23a is fixed to the other end thereof, as shown in FIG. And
A bevel gear 24a is meshed with the bevel gear 23a. In addition, as shown in FIG.
The bevel gear 4a is fixed at one end of the feed chain transmission shaft 24 and at the other end thereof by a bevel gear 24b.
5a and this bevel gear 24b mesh with each other and are fixed to the other end of the feed chain drive shaft 25, as shown in FIG.
The feed chain drive sprocket 9a on which the feed chain 9 is wound is driven.

Next, the combine harvesting stop mechanism of the present invention will be described. As shown in FIG. 4, the reaping input shaft 23 has a spline groove 23b formed in the middle thereof.
The spline groove portion 23b has a limit clutch that is disengaged when an overload is applied. In this embodiment, as shown in FIG. 7, a claw portion 26a including a convex "mountain" portion and a concave "valley" portion is formed. The claw clutch 26 formed at the end portion is externally fitted so as to be slidable in the left-right direction as shown in FIGS. 4 and 6. The claw clutch 26 has a recess 2 at the center in the circumferential direction.
6b is formed, and in this recess 26b, it has a substantially C-shape as shown in FIGS.
The bent portions 27a and 27a of the clutch hawk 27, which are pivotally supported by the cutting input case 28 at b and the front portion 27c, are fitted. In addition, in the middle of the reaping input shaft 23,
A bevel gear 36 having a pawl portion 36a having the same shape as the pawl portion 26a formed at the end is loosely fitted to the cutting input shaft 23 in a non-slidable manner, and the bevel gear 36 drives the cutting portion drive. Bevel gear 11 that is fixed to the end of shaft 11
a.

The clutch hawk 27 has a rear portion 27b.
6 and 7, the rear portion 27b is axially fixed to a substantially central portion of a rotary stay 29 having a rectangular shape in front view, as shown in FIGS. The side is provided with a connecting pin 35 fixed to an end of the inner wire 33a of the clutch wire 33, which will be described later.
It is locked so as to be able to be pulled upward through 4.

The reaping input case 28 has an end 31a.
Is bent at a right angle, and a clutch pivot plate 31 formed in a substantially L shape in a side view is locked via locking bolts 32, 32 ... And the above-mentioned clutch wire 33.
The outer wire portion is supported by the end portion 31a of the clutch pivot stay 31. An opening 29a is provided on the other side of the rotating stay 29, one end 30a of the spring 30 is fitted into the opening 29a, and the other end 30b is formed in the clutch pivot plate 31. Opening 3
It is fitted in 1b. Then, the rotating stay 29
Is normally urged by the spring 30 and arranged at the position a shown in FIG. 6, and the clutch fork 27, which is axially fixed to the rotary stay 29, is arranged at the position α. Claw clutch 2 that works with the hawk 27 as described above
The claw portion 26a of No. 6 meshes with the claw portion 36a of the bevel gear 36 to drive the bevel gear 36, and the bevel gear 11
The reaper drive shaft 11 is driven via a.

Next, when the inner wire 33a of the clutch wire 33 is pulled up against the urging force of the spring 30, as shown in FIG. 6, the rotary stay 29 is located at the position b with the front portion 27c of the clutch hawk 27 as a fulcrum. Is rotated to
The clutch hawk 27 is rotated to the position β, the pawl clutch 26 slides to the right side of the drawing, the pawl portion 26a of the pawl clutch 26 and the pawl portion 36a of the bevel gear 36 are disengaged, and the bevel gear 36 rotates. The harvesting section drive shaft 11 is stopped at the same time, and the driving of the harvesting section A is stopped.

[0019]

Since the present invention is constructed as described above,
It has the following effects. That is, since a limit clutch is provided in the middle of the cutting input shaft that transmits power from the mowing input pulley to the feed chain, the limit clutch can connect and disconnect power to the mowing portion, and the feed chain is constantly driven. It is possible to stop driving only the reaper. In addition, it became easier to synchronize the transfer speed between the mowing unit and the feed chain.

[Brief description of drawings]

FIG. 1 is an overall side view of a combine.

FIG. 2 is a side view of the reaper.

FIG. 3 is a plan view of the same.

FIG. 4 is a schematic plan view of transmitting power from a reaping input pulley to a feed chain.

FIG. 5 is likewise a schematic side view.

FIG. 6 is a front view of the main part, showing the cutting stop mechanism of the present invention.

FIG. 7 is also a side view.

FIG. 8 is a plan view of a cutting blade.

FIG. 9 is a schematic plan view showing a drive stop mechanism for the cutting blade alone.

FIG. 10 is a schematic diagram showing a detection method of a sensor for detecting raising of grain culm.

FIG. 11 is a control block diagram for detecting the raising of grain culm and stopping the cutting blade drive.

[Explanation of symbols]

 A Mowing part 9 Feed chain 11 Mowing part drive shaft 22 Mowing input pulley 23 Mowing input shaft 26 Claw clutch (limit clutch)

Claims (1)

[Claims] 1. A combine for transmitting power from an engine to a reaping input shaft for driving a reaping device and driving a feed chain from the reaping input shaft, wherein a limit clutch is arranged in the middle of the reaping input shaft. The harvesting stop mechanism of the combine, wherein the harvesting unit is driven through the limit clutch.