JPH0739227A - Transmission gear of pretreatment unit in combine - Google Patents

Abstract

PURPOSE:To smoothly control, e.g. the height of cutting by simplifying the transmission structure of the second cutting blade in relation to a transmission gear of a pretreatment unit of a combine. CONSTITUTION:This transmission gear of a pretreatment unit in a combine has a following structure; A thresher and a grain tank are carried on a car body equipped with a running gear and the thresher is coupled to a cutting- pretreatment unit composed of a reel, the first cutting blade, a rake-in auger 7 and a grain and culm conveyor at the front part so that the cutting- pretreatment unit may be freely lifted. The cutting-pretreatment unit is equipped with the second cutting blade 10 in a state where the blade is freely lifted or lowered and with hydraulic motors 12 and 13 for driving the second cutting blade 10 and a discharge spiral device 11 set to the grain tank 4. The hydraulic circuit 15 is designed so as to drive the hydraulic motors 12 and 13 only by one hydraulic pump 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission device for a pretreatment section of a combine, and is used for an all-cullet type combine.

[0002]

2. Description of the Related Art Conventionally, all-culm-type combine harvesters are provided with a first cutting blade and a second cutting blade in order to efficiently reduce the consumption horsepower during threshing and to thresh efficiently. According to the configuration, only the portion near the spikes on the upper part of the grain culm is cut and supplied to the handling room by the conveyor, and the remaining stock portion is cut by the second cutting blade and left in the field scene. With this configuration, the threshing machine is capable of efficiently threshing because it consumes less horsepower for threshing because the amount of grain culm supplied to the handling chamber is limited.

In this case, the second cutting blade is mounted below the rear part of the pretreatment device, and it is necessary to adjust the cutting height up and down in order to cut off the remaining culm of the field left by the first cutting blade. ,
There is a problem that the vertical movement may be frequently adjusted and the storage position may be lifted to a non-working position, which complicates the transmission structure.

[0004]

Therefore, in this type of combine, the transmission mechanism to the second cutting blade is made as simple as possible to adjust the cutting height during work and move to the storage position after work. There is a demand for an easy-to-use device. In particular, since the second cutting blade needs to be frequently moved up and down as described in the section of the prior art, it is necessary to simplify the transmission structure as much as possible and to make it inexpensive.

Therefore, the present invention is to solve the problems as follows. That is, in the case where the second cutting blade is configured to be driven by using the hydraulic motor, it is sufficient to drive the second cutting blade only when the second cutting blade is not used.
The gear is also equipped with a hydraulic motor, and a hydraulic circuit is constructed so that these two hydraulic motors can be driven by a single hydraulic pump, thereby rationalizing the transmission configuration.

[0006]

The present invention provides the following specific technical means in order to solve the above problems. That is, the thresher 3 and the grain tank 4 are mounted on the chassis 2 having the traveling device 1, and the reel 5, the first cutting blade 6, and the scraping blade are provided in front of the thresher 3. -Mo 7
And a grain cutting conveyor conveyer 8 are provided to be connected to a mowing pretreatment device so as to be vertically movable, and the mowing pretreatment device 9 is provided with a second mowing blade 10 which is vertically movable. 10
And hydraulic motors 12 and 13 for driving the discharge spiral device 11 mounted on the Glen tank 4, and the hydraulic motor 1
2 is a transmission device of a pretreatment unit in a combine in which a hydraulic circuit 15 in which 2 and 13 are driven by one hydraulic pump 14 is configured.

[0007]

EXAMPLE First, the structure will be described. Chassis 2
It has a traveling device 1 composed of a crawler, and has a thresher 3 mounted on one side of an upper surface and a grain tank 4 arranged in parallel on the other side in a plan view. Then, the thresher 3 forms an all-culm throw-in type handling chamber 17 in which the handling barrel 16 is mounted along the traveling direction of the chassis 2, and a sorting chamber 19 in which a swinging sorting shelf 18 is suspended below the handling chamber 17. Are configured.

The threshing machine 3 is constructed so that the grain culm supplied from the grain culm supply port 20 provided on the front side can be threshed in the handling chamber 17. Glen tank 4 is threshing machine 3
It is provided so as to store the first grain that has been threshed and sorted by, and when the stored grain reaches a predetermined amount, it is configured to be discharged to the outside by using the discharge spiral device 11.

The pre-mowing treatment device 9 is provided with a weeding rod 2 from the front.
1, the reel 5, the first cutting blade 6, the scraping auger 7, and the grain culvert conveyor 8 are integrally attached to the reaper frame 22, and the hydraulic cylinder 23 can freely move up and down on the front part of the thresher 3. It is configured by connecting to. And the weeding rod 21 is a reaper frame 22.
It is located at the lowest position in the foreground, and is designed to divide the grain culms in the field as it moves forward.

The first cutting blade 6 is provided on the rear of the weeding rod 21 of the reaper frame 22 and is configured to cut grain culms. The first cutting blade 6 is configured to move to a high cutting position in which the pre-mowing treatment device 9 is slightly lifted upward and to move to cut the upper part of the grain culm in the field. The reel 5 is rotatably mounted on the upper side of the first cutting blade 6 so as to be rotatable, and scrapes in the direction of the first cutting blade 6 the grain culms in the field which have reached the range of the left and right sward rods 21. Is configured as follows. The scraping auger 7 has, on its outer peripheral surface, a transport spiral 24 for transporting the cut grain culm to one side, and a scraping finger 25 for scraping the collected grain culm backward. The first cutting blade 6 is axially mounted behind the first cutting blade 6.

The grain culm transporting conveyor 8 is composed of a conveyor belt capable of transporting grain culm, the starting end portion of which faces the sweeping finger 25 of the sweeping auger 7 and the end portion of the handling chamber 17. It is configured so as to face the grain culm supply port 20. The second cutting blade 10 is provided at the rear part of the reaper frame 22, and is configured to be vertically movable relative to the first cutting blade 6.

The second cutting blade 10 has a hydraulic motor 12
Is equipped with a drive mechanism, and the discharge spiral device 11 is
A hydraulic motor 13 is provided for driving.
The two hydraulic motors 12 and 13 are connected to the switching valve 2 from one hydraulic pump 14 like the hydraulic circuit 15 shown in FIG.
6 is a circuit that can be driven by sending oil to either side via 6. That is, when the operation lever 27 is operated to the left in FIG. 1 (the direction opposite to the arrow a), the operation lever 27 is fed to the hydraulic motor 13 via the valve C and driven to transmit the discharge spiral device 11. And the opposite direction (direction of arrow a)
When it is operated to, the oil is sent to the hydraulic motor 12 side via the valve A to be driven, and the second cutting blade 10 is driven.

The relief valve 28 is the operation lever-2.
The valve pressure is changed in association with the operation of 7, and in the structure of the embodiment, the valve pressure can be increased and the drive torque can be changed when the second cutting blade 10 is driven. Alternative Example 1 As described above, the operation lever 27 is composed of a single lever, and the second cutting blade 10 and the discharge spiral device 11 can be driven in association with the forward and backward operations thereof. I am trying. Then, the operation lever 27, as shown in FIG.
Automatic switch 2 when operated to drive the cutting blade 10
9 is turned on.

The automatic switch 29 of the second cutting blade 10 is turned on.
Then, the automatic height control device starts to operate and the cutting height is automatically controlled.
When 7 is returned to the neutral (solid line in FIG. 4) position, the automatic switch 29 is turned off and can be raised to the upper storage position. Reference numeral 45 is a controller, 46 is a non-contact cutting pretreatment sensor, and 47 is a grounding cutting height sensor.

In the configuration of this embodiment, the second cutting blade 1
In 0, when the switching valve 26 is switched to the valve A by the operation of the operation lever 27, the lever 27 turns on the automatic switch 29 to start the automatic control of the cutting height. Therefore, when the automatic control is started, the second cutting blade 10 descends from the upper storage position to the cutting position and is ready for work.

Second Embodiment Another embodiment will be described with reference to FIGS. 6 and 7. The reaping tension clutch device 30 includes a pulley 3 of the transmission box 31.
The tension belt 35 is provided on the transmission belt 34 wound between the pulley 2 on the side of the first cutting blade 6 and the pulley 33 on the side of the first cutting blade 6 so that the transmission operation to the first cutting blade 6 can be interrupted. And Lee
The tension clutch 36 is a clutch of the transmission box 31.
Pulley 39 pivotally attached to the bases of reel 37 and reel arm 38
Tension pulley 4 is attached to the transmission belt 40 wound between
1 is provided so that the transmission operation to the reel 5 can be interrupted.

The clutch lever 42 has the above-mentioned 2
The two tension pulleys 35 and 41 are connected to each other via the operation wire 43, and the clutch is turned off in the upright state.
It is configured to be n. And that clutch lever
Numeral 42 is arranged below the reel arm 38 so that when the reel 5 is lowered to the working position, the reel arm 38 can be pushed to operate the clutch on state. There is.

Reference numeral 48 denotes a hydraulic cylinder, which is configured to move the reel 5 up and down. Next, the operation will be described. First, when the engine is started to drive the rotating parts of the machine body and the operation lever 27 is operated in the direction of arrow A (see FIG. 1), the valve A of the switching valve 26 communicates with the pump passage and the hydraulic pump 14 To hydraulic motor 1
It is sent to 2 and started. Then, the second cutting blade 10
While being driven by the hydraulic motor 12, the automatic switch 29 is turned on to move from the storage position to the work position to be in the work position.

Next, when the mowing threshing work is started while the chassis 2 is moved forward, the grain culms in the field are cultivated by the weeding rods 21 in the front part and the first mowing behind the reel 5 rotating. Blade 6
It is scraped by being scraped to the side. In this way, the cut grain culms are sent to the rear and reach the rotating scraping auger 7, and are sequentially sent to one side by the transport spiral 24 to be collected and collected by the scraping finger 25. Reach

Next, the grain culm has its scraping finger-25.
Is supplied to the starting end portion of the grain culm transporting conveyor 8 and is transported upward. In this way, the grain culm is supplied from the terminal end of the grain culm transport conveyor 8 to the handling chamber 17 and reaches the rotating handling barrel 16 to be threshed, and then leaks to the sorting chamber 19 for sorting processing. It is a thing.

The grains are continuously conveyed to and stored in the grain tank 4 for continuous operation. During the above-mentioned work, the mowing pretreatment device 9 is automatically held while being positioned at a predetermined height and thereafter detecting the height from the field scene by the mowing pretreatment part sensor-46. On the other hand, the second cutting blade 10 carries out the work while automatically maintaining a predetermined cutting height under the control of the controller 45 based on the detection result of the cutting height sensor 47.

The first cutting blade 6 is placed at a high cutting position in order to reduce the amount of grain culms supplied to the handling chamber 17,
The second cutting blade 10 is positioned and controlled at a low position so that the stumps can be shortened, and the work is performed while controlling. 2nd cutting blade 1
0 is frequently moved up and down with respect to the cutting pretreatment device 9 in accordance with the cutting height control, but since the hydraulic motor 12 is integrally attached, the transmission structure is very simple. Therefore, the vertical operation can be smoothly performed while maintaining the driving state.

Now, when the cutting and threshing work is continuously carried out in this way and the number of grains in the Glen tank 4 reaches a predetermined amount,
Moving to grain discharge work, at that time, first, the operation lever
Operate 27 and operate in the opposite direction of arrow a. Then,
The discharge spiral device 11 is driven by the valve C of the switching valve 26 communicating with the hydraulic pump 14 to start oil supply to the hydraulic motor 13, and is transmitted through the hydraulic motor 13. It Therefore, the grain in the Glen tank 4 is
It is conveyed by a series of rotating discharge spiral devices 11 and sent out of the machine.

[0024]

As described above, according to the present invention, the threshing machine 3 and the grain tank 4 are mounted on the chassis 2 having the traveling device 1.
And is installed, and a reel 5 is provided at the front of the thresher 3,
A mowing pretreatment device 9 including a first cutting blade 6, a scraping auger 7, and a grain culvert conveyor 8 is vertically connected to the mowing pretreatment device 9, and the mowing pretreatment device 9 is vertically movable. 2nd cutting blade 1
0, and a hydraulic motor 12, 1 for driving the second cutting blade 10 and the discharge spiral device 11 mounted on the Glen tank 4.
3 is provided, and the hydraulic circuit 15 for driving the hydraulic motors 12 and 13 by one hydraulic pump 14 is configured. Therefore, the second cutting blade 10 has a simple power transmission configuration and can be used for controlling the cutting height. Therefore, even if the cutting pretreatment device is frequently moved in the vertical direction, the hydraulic motor 12 integrally moves up and down, so that the cutting height adjusting operation is extremely smooth.

[Brief description of drawings]

FIG. 1 is a diagram showing a hydraulic circuit according to an embodiment of the present invention.

FIG. 2 is a side view showing a part of the embodiment of the present invention in section.

FIG. 3 is a plan view of a part of the embodiment of the present invention.

FIG. 4 is an operational side view of a part of the embodiment of the present invention.

FIG. 5 is a block circuit diagram of an embodiment of the present invention.

FIG. 6 is a plan view showing another embodiment of the present invention.

FIG. 7 is a side view showing another embodiment of the present invention.

[Explanation of symbols]

1 traveling device 2 chassis 3
Thresher 4 Glen tank 5 Reel 6
First cutting blade 7 Scraping auger 8 Grain culvert conveyor 9
Mowing pretreatment device 10 Second cutting blade 11 Discharge spiral device 12
Hydraulic motor 13 Hydraulic motor 14 Hydraulic pump 15
Hydraulic circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masakazu Hirose 1 Hachikura, Tobe Town, Iyo-gun, Ehime Prefecture

Claims (1)

[Claims] 1. A thresher 3 on a chassis 2 having a traveling device 1.
And a grain tank 4 are mounted on the front portion of the thresher 3, and a harvester including a reel 5, a first cutting blade 6, a scraping auger 7, and a grain culvert conveyor 8 is provided. A pretreatment device 9 is provided so that it can be vertically moved up and down, and the mowing pretreatment device 9 is provided with a second cutting blade 10 that is freely movable up and down, and a discharge spiral equipped on the second cutting blade 10 and the Glen tank 4. The transmission device of the pretreatment unit in the combine, which is provided with the hydraulic motors 12 and 13 for driving the device 11 and the hydraulic circuit 15 which drives the hydraulic motors 12 and 13 by one hydraulic pump 14.