JP2774420B2 - Combine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side clutch capable of transmitting power from a prime mover to a pre-cutting unit and a pair of left and right traveling devices via a speed change means and capable of intermittently transmitting power to the two traveling devices. And a side clutch interlocking operation means capable of operating the two side clutches simultaneously.

[0002]

2. Description of the Related Art Conventionally, in a combine of this type, a cutting drive speed of a cutting pre-processing unit and a drive speed of a traveling device are synchronized so that a cutting is performed in a fixed cutting posture even when a vehicle speed changes. The transport of the harvested culm to the threshing device is performed smoothly. And in the combine,
Even after the harvesting operation of one stroke is completed in the field, even if the traveling is stopped due to the change of the machine direction at the headland, regardless of the stop of the traveling device, the harvesting culm in the pre-cutting processing unit is not dropped. In order to continue the driving of the pre-cutting unit and the threshing device, a pair of left and right traveling devices each having two side clutches capable of intermittently operating the transmission of the pair of traveling devices can be simultaneously intermittently operated is disclosed in, for example, Japanese Patent Laid-Open Publication No. It is known as disclosed in JP 135415.

[0003]

However, in the conventional combine described above, the side clutch interlocking operation means capable of operating both side clutches simultaneously at the same time is provided. When switching from a state in which both side clutches are disengaged to a state in which both side clutches are engaged, first perform an operation of setting the transmission to a neutral state with respect to the traveling device,
When both side clutches must be engaged, the operation is cumbersome, and when the operation of setting the shifting means to the neutral state is forgotten and the two side clutches are engaged, the transmission connection to the traveling device is shocking. As a result, the transmission system is suddenly overloaded, causing problems such as applying excessive stress to the transmission mechanism and stopping the engine. The present invention has been made in view of the above-described circumstances, and when the two side clutches are engaged after the operation of driving only the cutting pre-processing unit or the like by disengaging the two side clutches, the traveling device is operated. It is an object of the present invention to provide a combine which can prevent an overload from being impressed to the power transmission system and can simplify the operation.

[0004]

In order to achieve the above object, a combine according to the present invention has a structure as set forth in the aforesaid structure, wherein a set time elapses after the side clutch is disengaged by the side clutch interlocking operation means. Then, a neutral return means for forcibly returning the transmission to the traveling device to a neutral state is provided. Further, in the above-mentioned structure, after the side clutch is disengaged by the side clutch interlocking operation means, a grain stalk non-existence state is detected from a grain stalk presence state by a grain stalk presence / absence detection sensor provided in the body. Neutral return means for forcibly returning the transmission to the traveling device to a neutral state based on the detection result may be provided. The operation and effect of this characteristic configuration are as follows.

[0005]

In other words, the transmission is forcibly returned to the neutral state when the set time elapses after the two side clutches are disengaged, so that the set time is
If it is set appropriately within the time from when the mowing traveling is stopped and only the pre-cutting processing section and the threshing device are driven to when the mowing culm can complete the threshing process, after completion of the threshing process, etc. Even when both side clutches are engaged in order to start traveling at, it is possible to prevent the power from the driving portion from being rapidly transmitted to the traveling transmission system. Further, after the side clutch is disengaged, when the cereal stalk non-existence state is detected from the cereal stalk presence state by the cereal stalk presence / absence detection sensor provided on the body, the transmission for the traveling device is set to the neutral state based on the detection result. In the one that is configured to forcibly return, by installing the grain stalk presence / absence detection sensor in, for example, a threshing device or a pre-cutting processing unit, both side clutches are engaged to start running after threshing processing etc. Even in this state, the abrupt transmission of power from the prime mover to the traveling transmission system is avoided.

[0006]

Thus, according to the present invention, even if the two side clutches for the pair of left and right traveling devices are simultaneously disengaged and then the side clutches are engaged after the threshing process or the like, the transmission for the traveling device is changed. Since the device is in a neutral state, it is possible to prevent the power from the driving unit from being suddenly transmitted to the traveling transmission system, and to prevent the transmission system to the traveling device from being overloaded. In addition to solving the problems such as stopping the engine, the operation becomes simple because it is not necessary to manually return the transmission to the traveling device to the neutral position when engaging and operating both side clutches.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a transmission mechanism of a traveling system of a combine according to the present invention. That is, the power from the engine 1 as a prime mover mounted on the body is transmitted to the input pulley 4 of the hydrostatic continuously variable transmission 3 as the speed change means via the belt transmission mechanism 2 having the tension clutch. The power from the output shaft 5 of the hydrostatic continuously variable transmission 3 is transmitted via a first transmission shaft 6 to a gear shift type transmission 8 as a transmission in a transmission case 7, And transmitted to the pair of left and right crawler traveling devices 10 and 10 via the gear shift type transmission 8.

As shown in FIG. 1, power from a first transmission shaft 6 is transmitted to a second transmission shaft 13 via a first gear 11 and a second gear 12. A shift gear 14 is slidably fitted on the second transmission shaft 13 in a spline structure, and a high-speed gear 16, a medium-speed gear 17 and a low-speed gear 18 are fixed to the third transmission shaft 15. By shifting the shift gear 14 according to the above configuration and engaging the high-speed gear 19, the medium-speed gear 17, and the low-speed gear 18 that mesh with the high-speed gear 16, the forward rotation power for straight traveling is shifted into three stages of high, medium, and low. This forward rotation power is transmitted to the first transmission gear 20 that meshes with the middle speed gear 17.
The shift gear 14 can be set to a neutral operation state by operating the shift gear 14 at a position where it is not engaged with each of the high-speed gear 19, the medium-speed gear 17, and the low-speed gear 18. As described above, the gearshift transmission 8 is constituted by the shift gear 14, the high-speed gear 19, and the like.

A right side gear 22R and a left side gear 22L are rotatably fitted on a support shaft 21 for supporting the first transmission gear 20, and an input gear 24 of a left and right axle 23 is connected to the left and right side gears 22R, 22R. It is always engaged with 22L. As a result, the right or left side gear 22R, 2R
The 2L is slid with respect to the first transmission gear 20 to engage or separate from the first transmission gear 20 to perform transmission and transmission cutoff operations with respect to the crawler traveling devices 10 and 10, and the first transmission gear 20 and the left and right side gears 22R and 22L are connected to each other. The side clutches 25R and 25L are configured between the two.

As shown in FIG. 1, a third gear 26 meshing with the high-speed gear 16 of the third transmission shaft 15 is fitted around the fourth transmission shaft 27 so as to be relatively rotatable, and the third gear 26 and the fourth transmission shaft 27
, A reverse clutch 28 is provided. And
Second transmission gears 29R and 29L are supported by bearings on both left and right ends of the support shaft 21, and each of the fourth transmission gears 30 fixed to both ends of the fourth transmission shaft 27 is a second transmission gear 29.
R, 29L. Thereby, the right side gear 22R or the left side gear 22L is connected to the right or left second gear 22R.
When the reverse clutch 28 is engaged while being engaged with the transmission gears 29R and 29L, the power from the high-speed gear 16 is reduced to half in the reverse rotation state and the traveling device 1
A super pivot state transmitted to 0 appears.

As shown in FIG. 1, a small-diameter output gear 31 is fixed to a boss of the first transmission gear 20, and a fourth transmission shaft 27 is provided.
The third transmission gear 32 having a large diameter is externally fitted to be relatively rotatable, and the third transmission gear 32 is engaged with the output gear 31.
Further, a gentle turning clutch 33 is provided between the third transmission gear 32 and the fourth transmission shaft 27. Accordingly, when the gentle turning clutch 33 is engaged while the right or left side gears 22R, 22L are engaged with the right or left second transmission gears 29R, 29L, the straight forward transmission transmitted to the first transmission gear 20 is performed. Output power 31, the third transmission gear 3
2. Through the gentle turning clutch 33, the fourth transmission shaft 27, the fourth transmission gear 30, and the right or left second transmission gear 29R, 29L, transmitted to one traveling device 10 as sufficiently reduced forward rotation power. Slow turning state appears.

As shown in FIG. 3, the hydraulic oil from the pump 34 is supplied to the left and right side gears 22 through the first switching valve 35.
The oil supply 37 is supplied to the hydraulic cylinders 36R and 36L for the R and 22L, and the oil passage 37 from the side surface of the hydraulic cylinders 36R and 36L is connected to the second switching valve 38 for the gentle turning clutch 33 and the reverse rotation clutch 28. The oil passage 37 further includes a gentle turning clutch 33 and a reverse rotation clutch 2.
8 is connected to a variable relief valve 39.

As shown in FIG. 3, a switching lever 40 provided on a control section of the fuselage and a second switching valve 38 are connected to an interlocking mechanism 4.
1 are mechanically interlocked and connected by the switching lever 40.
Accordingly, the second switching valve 38 is switched between a gentle turning position 38a for supplying hydraulic oil to the gentle turning clutch 33 and a super pivot position 38b for supplying hydraulic oil to the reverse rotation clutch 28. An operation lever 42 provided on a control section of the fuselage;
The switching valve 35 and the variable relief valve 39 are connected to the link mechanism 4.
It is mechanically linked via 3 and 44.

Further, as shown in FIG. 2, a traveling brake 45 is provided on the fourth transmission shaft 27. The outer 46a of the release wire 46 is connected to the left side gear 22.
The operation unit 47L for L is connected to the operation unit 47R for the right side gear 22R, and the inner 46b is connected to the operation unit 47R for the right side gear 22R.
A brake pedal 48 (corresponding to a manual operation device for a stop operation) is disposed in a control section of the fuselage.
The other end of the inner 46b is connected to the brake pedal 48. Then, the brake pedal 48 and the brake 45
Are connected to each other by a wire 49 and a spring 50 for flexibility. Here, brake pedal 4
8, the release wire 46, and the operation parts 47R, 47L constitute side clutch interlocking operation means 56. In the above configuration, when the brake pedal 48 is depressed, the left and right operation parts 47R and 47L are operated by the action of the outer 46a and the inner 46b of the release wire 46, and the left and right side gears 22R and 22L are moved from the first transmission gear 20 to the left and right. , And engages with the second transmission gears 29R, 29L, so that the left and right side clutches 25R, 25L are disconnected.

Further, as shown in FIG. 2, a limit switch 51 for detecting a depressing operation state of the brake pedal 48 is provided, and a control device 52 to which information from the limit switch 51 is input is provided on the body. When a detection signal indicating that the brake pedal 48 has been depressed is input from the limit switch 51, the control device 52 starts time counting of the timer 53, and the depression of the brake pedal 48 continues for more than a set time. Then
In order to automatically forcibly return the shift gear 14 to the neutral operation position, a control signal for operating the shift operation lever 53 linked to the shift gear 14 to the neutral position N by the electric cylinder 54 is output. Here, the limit switch 51, the control device 52, the timer 53, the electric motor 54, and the drive device 55 constitute a neutral return means 57.

According to the above configuration, after the reaping work in one work stroke is completed, even if the brake pedal 48 is depressed to temporarily stop running to change the direction of the body on the headland to the next stroke, the pair of left and right wheels can be moved. Side clutch 25R, 25
Since only L is cut off, the driving of the pre-cutting unit 9 and the like is continued irrespective of the stoppage of running, the problem that the harvested culm falls in the pre-cutting unit 9 is solved, and the brake is applied for a set time or more. If you continue to depress the pedal 48,
Since the gear shift type transmission 8 automatically returns to the neutral operation state, even if the brake pedal 48 is depressed to start traveling, the traveling transmission system suddenly enters the transmission state and suddenly starts. Can be avoided.

Next, a second embodiment of the present invention will be described. In addition, about the structure similar to 1st Example, the description is abbreviate | omitted and the same code | symbol is used. 4 and 5
As shown in the figure, a detection signal of the stock sensor 59 as a grain stalk presence / absence detection sensor provided in the pre-cutting processing unit 9 that detects the presence or absence of a grain stalk is input to the control device 52 provided in the machine body. At the same time, a detection signal indicating that the brake pedal 48 has been depressed is input from the limit switch 51 for detecting the depressed state of the brake pedal 48 to the control device 52, and a grain stem non-existence signal is output from the stock sensor 59. When input to the control device 52, the shift operation lever 53 linked to the shift gear 14 is servo-operated by the electric motor 54 so that the shift gear 14 is automatically forcibly returned to the neutral operation position according to the AND condition of the two signals. It is configured to output a control signal to the driving device 55 to be controlled. Here, the limit switch 51, the control device 52, the stock sensor 59, the electric motor 54, and the driving device 5
5 constitutes the neutral return means 60. This gives 1
After the reaping work of one working stroke is completed, even if the brake pedal 48 is depressed to temporarily stop running to change the direction of the aircraft to the next stroke at the headland, only the pair of left and right side clutches 25R and 25L is disengaged. Therefore, the driving of the pre-cutting processing unit 9 and the like is continued irrespective of the stop of traveling,
Further, when the stock sensor 59 detects the absence of the grain stalk while the brake pedal 48 is being depressed, the gearshift transmission 8 automatically returns to the neutral operation state based on the detection result. Therefore, even if the depression of the brake pedal 48 is released in order to start traveling, it is possible to avoid such a problem that the traveling transmission system suddenly enters the transmission state and suddenly starts.

The present invention may be implemented as follows. (A) Instead of a stock sensor, a culm length sensor for adjusting the handling depth or a cereal culm detection sensor in a threshing feed chain is used as a sensor for detecting the presence or absence of cereal culm.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a transmission system to a traveling device and a neutral return means.

FIG. 2 is an explanatory diagram showing a linked state between a brake pedal, a traveling brake, and left and right side clutches.

FIG. 3 is a hydraulic circuit diagram of hydraulic cylinders for left and right side clutches, a gentle turning clutch, a reverse rotation clutch, and the like.

FIG. 4 is a schematic diagram showing a transmission system to a traveling device and a neutral return means according to another embodiment.

FIG. 5 is a side view showing the front part of the combine.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 drive unit 8 speed change means 9 cutting pre-processing unit 10 traveling device 25R, 25L side clutch 56 side clutch interlocking operation means 57 neutral return means 59 grain stalk existence detection sensor 60 neutral return means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) A01D 34/24-69/12 B60K 20/00-20/08 B60K 41/00-41/28

Claims (2)

(57) [Claims] A transmission from a prime mover (1) to a pre-cutting unit (9) and a pair of left and right traveling devices (10) via a speed change means, and transmission to the two traveling devices (10) is performed by each of the transmission devices. Separately connectable side clutches (25R) and (25L) are provided, and both side clutches (25R) and (25R) are provided.
L) is a combine provided with a side clutch interlocking operation means (56) capable of simultaneously intermittently operating the side clutch (2) by the side clutch interlocking operation means (56).
A combine provided with a neutral return means (57) for forcibly returning the transmission (8) to the traveling device (10) to a neutral state when a set time has elapsed after the turning operation of 5R) and (25L). 2. A transmission from a prime mover (1) to a pre-cutting processing unit (9) and a pair of left and right traveling devices (10) via transmission means, and transmission to the two traveling devices (10) is performed by each Separately connectable side clutches (25R) and (25L) are provided, and both side clutches (25R) and (25R) are provided.
L) is a combine provided with a side clutch interlocking operation means (56) capable of simultaneously intermittently operating the side clutch (2) by the side clutch interlocking operation means (56).
5R) and (25L), when the cereal stalk non-existence state is detected from the cereal stalk presence state by the cereal stalk presence / absence detection sensor (59) provided on the body, the traveling device ( A combine provided with a neutral return means (60) for forcibly returning the transmission (8) to 10) to a neutral state.