JPS586446B2 - Transmission device in reaper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a transmission device for a main machine such as an agricultural combine harvester, and the transmission device changes the cutting blade or the stem culm pulling device or both (hereinafter referred to as a reaping device) in conjunction with the vehicle speed.

) is configured to change the operating speed in direct proportion.

According to this configuration, the reaping device can always be operated at an appropriate speed according to changes in vehicle speed, and there is no possibility of the machine body pulling down or trampling down the planted stem culm, or that there will be no shedding caused by forceful lifting action. However, when the vehicle speed is extremely low, the cutting blade operates at a very low speed, which can lead to poor cutting, especially in the case of the clipper type. If the operating speed of the reaping device is set to a high speed in advance to avoid cutting defects even at low vehicle speeds, the operating speed of the reaping device may be excessive when the vehicle is at high speeds, causing stem culm damage such as shedding. There is a risk of damage.

In view of this, the present invention aims to make it possible to always operate the reaping device at the above-mentioned appropriate operating speed depending on the train of vehicles over the entire range of vehicle speeds.

That is, the transmission device in the reaper according to the present invention is capable of switching between a high-speed operating state and a low-speed operating state the transmission device interposed in the transmission system for the cutting blade or the culm pulling device, or both, which operate in conjunction with the vehicle speed. In a transmission device for a reaper configured to be switchable, an operating tool for the transmission device is disposed in a predetermined operation range on the forward side of a speed change guide groove of a vehicle speed change operation lever so as to be freely retractable. By moving the vehicle speed change operation lever in the speed change guide groove in conjunction with the speed change operation, the cutting blade or the pulling device or both operate at high speed in the low speed range below the constant vehicle speed value, and In the above-mentioned high speed range, the gear ratio of the transmission device is configured to be freely changeable so that the cutting blade or the pulling device or both operate at a low speed.

According to the above configuration, the operating speed of the reaping device is changed in direct proportion to the vehicle speed, but in the slow speed range below a certain vehicle speed value, the transmission is put into a high speed operating state, and the reaping device can be reaped regardless of the slow vehicle speed. It is possible to maintain the operating speed of the device above the minimum value that does not cause cutting defects, and in high-speed ranges above a certain vehicle speed value, the transmission is set to a low-speed operating state, and the operating speed of the reaping device is maintained regardless of the high vehicle speed. can be kept below the maximum value without damaging the stem culm.

Furthermore, when changing the gear ratio of the reaping device relative to the vehicle speed when the vehicle speed is below or above a certain value, an operating tool that comes into contact with the vehicle speed change lever is provided in the constant operation range of the guide groove of the vehicle speed change operation lever. Since the speed of the reaping transmission is changed via an operating tool, for example, operating tools for changing the gear ratio of the reaping device relative to the vehicle speed are provided on both sides of a vehicle speed change operating lever, and the operating tools are used to operate the vehicle speed change. Compared to the case where selection is performed using a lever, the reaping transmission can be switched by using the forward and backward movement of a single operating tool, and this allows the reaping transmission to change depending on the vehicle speed when the vehicle speed is below or above a certain value. This has the advantage that the structure for changing the gear ratio can be made simple.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an agricultural combine harvester, which includes a machine body equipped with a crawler traveling device A, a planted grain culm reaping device B, a harvested grain culm transport device C, a threshing device D, and a waste straw processing device E.
are disposed in order from the front to the rear, and a riding driving section F is disposed on the lateral side of the harvested grain culm conveying device C.

The planted grain culm reaping device B includes a pulling device 2 that pulls up and conveys the planted grain culm to a nearly vertical position, and a clipper-type mower that cuts the stock base of the planted grain culm that is pulled up by sliding back and forth. It is equipped with a blade 1.

Figure 2 shows the power transmission system of an agricultural combine.

The crawler traveling device A is configured so that power from an engine 7 is transmitted through a main clutch 4, a hydraulic continuously variable transmission device 5, and a steering clutch 6 in this order. And the pulling device 2 includes the main clutch 4.
, a hydraulic continuously variable transmission 5, and a transmission 3 in order to transmit power from the engine 7.

That is, the cutting blade 1 and the pulling device 2 are configured to change their operating speeds in proportion to the vehicle speed.

As shown in FIG. 3, the hydraulic continuously variable transmission 5 is linked via a wire or the like to a shift operating lever 10 whose movement is guided by a crank-shaped shift guide groove 9 formed in a shift guide plate 8. The structure is such that the gears can be connected and used to change gears.

Accordingly, in the present invention, the transmission device 3 is configured to be switchable between a high speed operating state and a low speed operating state, and the shift operation lever 10 is configured to be switchable between a high speed operating state and a low speed operating state, and the shift operating lever 10 is configured to be able to switch between a high speed operating state and a low speed operating state, and
A lever detection plate 11, which is an operating tool that can come into elastic contact with the side surface of the transmission device 3, is provided, and the lever detection plate 11 comes into elastic contact with the lever 10 and is elastically displaced outward from the groove 9, thereby controlling the transmission 3. The transmission 3 is interlocked and connected to the lever detection plate 11 via a wire or the like in order to switch from a high-speed operating state to a low-speed operating state, so that when the vehicle speed is below a certain value, the transmission 3 is set to a high-speed operating state and the reaping device B
is linked to the vehicle speed, and on the other hand, when the vehicle speed is above a certain value, the transmission 3 is brought into a low speed operating state and the reaping device B is linked to the vehicle speed.

In the figure, reference numeral 12 denotes a detection tool that elastically contacts the side surface of the lever 10 to detect that the shift operation lever 10 has been moved from a low forward speed range to a high forward speed range, and 13 is a detection tool 13 of this detection tool 12. An alarm device such as a lamp or buzzer that operates in response to a detection operation.

According to the above configuration, the operating speed of the reaping device B increases as the vehicle speed increases, but in the low speed range below a constant vehicle speed value, the transmission device 3 is in a high speed operating state, so the vehicle speed is very slow. Even if the vehicle speed becomes extremely high, the cutting blade 1 can be operated at an operating speed above a certain level.On the other hand, in a high speed range above a certain vehicle speed value, the transmission 3 is in a low speed operating state. The pulling device 2 can be operated at an appropriate operating speed without operating at an unnecessarily high speed.

[Brief explanation of drawings]

The drawings show an embodiment of the transmission device in a reaping machine according to the present invention, FIG. 1 is a side view of an agricultural combine, FIG. 2 is a power system diagram of the agricultural combine, and FIG. 3 is an enlarged plan view of the main parts of the transmission operating device. It is a diagram. 1... Cutting blade, 2... Stem culm pulling device,
3...Transmission device, 9...Guide groove, 10
...Vehicle speed change operation lever, 11...Operation tool.

Claims (1)

[Claims] 1. A transmission 3 interposed in the transmission system to the cutting blade 1 or the culm pulling device 2, or both 1 and 2, which operates in conjunction with vehicle speed, is configured to be switchable between a high-speed operating state and a low-speed operating state. In the transmission of the reaper, an operating tool 11 for the transmission 3 is disposed in a fixed operating range on the forward side of the speed change guide groove 9 of the vehicle speed change operation lever 10 so as to be freely retractable. By moving the vehicle speed change operation lever 10 in the speed change guide groove 9 in conjunction with the speed change operation, the cutting blade 1, the pulling device 2, or both are activated in a low speed range below a constant vehicle speed value. 1 and 2 operate at high speed, and in a high-speed range equal to or higher than the constant vehicle speed value, the cutting blade 1 or the pulling device 2 or both 1 and 2 operate at low speed. A transmission device for a reaper, characterized by being configured to freely change the ratio.