JPH1028456A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply constitute a combine harvester which can inhibit the movement of its machine body by its own weight, even when the machine body is stopped on an inclined ground. SOLUTION: This combine harvester is equipped with a braking mechanism 23 which allows the braking force to act on the crawler unit and equipped with a wire 39 which can set the braking mechanism 23 on with its operation power in the operation that the harvesting clutch J is cut for transmitting the powder to the pre-reaping working part B in front of the running machine body, meanwhile in the operation that the reaping clutch J is set on, the braking mechanism 23 is set off with its operation power.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine and, more particularly, to an improvement in a braking device for applying a braking force to a traveling device.

[0002]

2. Description of the Related Art Conventionally, there is a combine as described in Japanese Patent Application Laid-Open No. 7-54956, and in this conventional example, when a shift lever is set to a neutral position, a stop brake is used. Pressure oil is supplied and a braking force acts on the traveling system.

[0003]

As described above, when the shift lever is operated to the neutral position and the pressure from the hydraulic pump is applied to the braking device to obtain a braking force, the operation is performed while the engine is running. When the vehicle is stopped, for example, when the vehicle is stopped, a braking force always acts on the traveling system to prevent the vehicle from moving due to its own weight. In addition, there is a need for an oil passage for controlling the braking device, and the configuration is easily complicated, and there is room for improvement. In particular, many combiners are provided with a braking device for manually performing a braking operation at the time of work, and the rational use of this braking device has been desired.

[0004] An object of the present invention is to simply construct a combine that can prevent movement of a vehicle body due to its own weight even when the vehicle body is stopped on a slope.

[0005]

SUMMARY OF THE INVENTION A feature of the present invention is to provide a braking device capable of switching between a braking state in which a braking force is applied to a traveling device and a non-braking state in which the braking force is released, and a front portion of a traveling vehicle body. At the time of the disengagement operation of the clutch mechanism that transmits the power to the pre-cutting unit provided in the above, the braking device is set to the braking state by the operating force, and at the time of the engagement operation of the clutch mechanism, the braking device is set to the non-braking state by the operating force. The operation is as follows.

[Action]

According to the above feature, for example, when the clutch mechanism is disengaged by interrupting the operation, the disengagement operation force is transmitted to the braking device by the operating mechanism to set the braking state, so that the movement of the vehicle body is prevented. Conversely, when the clutch mechanism is engaged for the purpose of performing work, the operating mechanism transmits this engagement operation force to the braking device to set the braking device to the non-braking state, and as a result, the vehicle body travels. Will be allowed. That is, in the present invention, since the operating force of the clutch mechanism is transmitted to the braking device, the braking device provided on the vehicle body can be used without adding a special braking device, and a dedicated actuator is also required. And not.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a cutting pre-processing unit B is connected to a front portion of a vehicle body A having left and right crawler traveling devices 1, and a control unit C is disposed at a position parallel to the right side of the pre-cutting processing unit B. The threshing device 2 and the Glen tank 3 are mounted on the vehicle body A to form a combine.

The cutting pre-processing unit B includes a raising device 4 for raising the grain stalk, a cutting blade 5 for cutting the root of the raised grain stalk,
A transport device 6 for feeding the harvested grain culm to the threshing device 3 is provided. The operating portion C includes a driving seat 7 on which an operator sits, and a shift lever 8 for setting a traveling speed of the vehicle body A. And a steering lever 9 for setting the traveling direction of the vehicle body A, and an engine 10 is disposed below the driver's seat 7. A transmission transmission case D is disposed at the left and right center position of the front of the vehicle body.

As shown in FIGS. 2 and 3, an input pulley 12 to which power from an engine 10 is transmitted via an endless belt 11 is provided at an upper portion of the transmission case D, and the transmission power is synchronized with the shifting power from the transmission case D. Output pulley 13 for taking out the generated power, sprockets 1S, 1S for driving the left and right crawler traveling devices 1, 1 are provided at a lower portion, and a steering cylinder case 14 is provided at a front surface. A transmission valve 15 of a rotary type is provided inside the transmission case D. An operation arm 15A of the transmission valve 15 and an arm 8A of the transmission lever 8 are connected to a rod 16
The cylinder case 14 is provided with a steering valve 17, and the operation arm 17 of the steering valve 17 is provided.
A and an arm 9A of the steering lever 9 are linked via a wire 18.

As shown in FIG. 2, inside a transmission case D, a gear type auxiliary transmission E for shifting the power from an input shaft 21 connected to the input pulley 12, and three forward-moving clutches A main transmission G having CP1, CP2, CP3 and one reverse clutch CP4;
A steering clutch H capable of selectively transmitting power from the transmission system to the left and right crawler traveling devices 1, 1 and, when the sleeves 22, 22 of the steering clutch H are operated to the disengagement side, It is provided with brake mechanisms 23 and 23 for applying a braking force to the running system on the disengagement side, and drive shafts 24 and 24 for transmitting power from the steering clutch H to the drive sprockets 1S and 1S. To the output pulley 13
Gear transmission K for transmission to the drive shaft 19.
Further, the auxiliary transmission E is linked so that it can be switched by operating a lever (not shown), and the main transmission G selectively operates the transmission clutches CP1 to CP4 by supplying and discharging pressure oil by the transmission valve 15. The traveling speed can be switched between three forward speeds and one reverse speed (see the hydraulic circuit diagram of FIG. 6).
The operating force from the ram cylinders 25, 25 (see FIG. 3) in which the
It is configured to be operated by being transmitted through 6, 26.

As shown in FIGS. 3 and 4, a dedicated operation arm 23A for externally operating a brake mechanism 23 as a left brake device is provided on the outer surface of the brake mechanism 23. The mechanism 23 is linked via a wire 28 to an arm 27A of the brake pedal 27 and an operation arm 23A of the brake mechanism 23 so that a brake operation is performed by a depression operation of a brake pedal 27 provided in the control section C. When the vehicle body is to be stopped for a long time, the brake mechanism 23 is maintained in the braking state by manipulating the operation lever 29 provided on the brake pedal 27 to the braking side artificially to maintain the braking state. It is constituted so that it can be used for.

As shown in FIG. 5, an endless belt 31 is provided between the output pulley 13 and the input pulley 30 of the pre-cutting unit B, and the power synchronized with the traveling speed is transmitted to the pre-cutting unit B. A power transmission system is formed, and a state where power is transmitted to the power transmission system by applying tension to the endless belt 31;
A reaping clutch J (an example of a clutch mechanism) is provided with a tension pulley 32 for switching the state to a state in which the tension is released and the power is cut off. The reaping clutch J includes a spring 35 that supports an arm 33 that supports the tension pulley 32 rotatably around a support shaft 34 and urges the arm 33 in the inward direction. A cylinder mechanism 36 that operates in the direction is provided. The cylinder mechanism 36 includes a cylinder case 36A provided on the rear surface of the transmission case D, and a piston 36B built in the cylinder case 36A. The transmission system from the input pulley 12 to the pre-cutting section B has a selection clutch 3
7, the selection clutch 37 is set in a transmission state to transmit power to the pre-cutting unit B at the same time as the running of the vehicle body A, as described later, so that the cutting operation can be performed. By setting 37 to the cut-off state, the pre-cutting unit B can be maintained in the non-drive state regardless of the running of the vehicle body.

As shown in FIG. 6, the shift valve 15 is in a neutral position N, a first forward speed position F1, and a second forward speed position F.
2. It is configured to be freely operable at the forward third speed position F3 and the reverse position R, and supplies pressure oil from the hydraulic pump P to the respective shift clutches CP1 to CP4 via the accumulator 38 during shifting. Transmission clutch CP1
Shock at the time of the entering operation of the CP 4 is reduced. Also, only when the neutral position N is set, the pressurizing oil is supplied to the cylinder mechanism 36 to turn off the cutting clutch J. It is linked to drain the oil from the mechanism 36 to enter and operate the reaping clutch J. As shown in FIGS. 4 and 5, when the cutting clutch J reaches the disengaged state by interposing the end of the arm body 33 and the operation arm 23A of the brake mechanism 23 via a wire 39 (an example of an operation mechanism), the brake is applied. An operation system for operating the mechanism 23 on the braking side is formed. By forming this operation system, the brake mechanism 23 is automatically maintained in the braking state when the vehicle stops, and the braking of the brake mechanism 23 is automatically performed during traveling. It is configured to release.

As described above, according to the present invention, the reaping clutch J, which is turned on and off by the hydraulic operation force during traveling, is linked to the brake mechanism 23, so that the vehicle can travel with the braking force of the brake mechanism 23 released during traveling. In addition, when the vehicle is stopped, the brake mechanism 23 is automatically switched to the braking state, so that, for example, even when the vehicle is parked on an inclined ground, the phenomenon that the vehicle body moves by its own weight can be prevented as long as the engine 10 operates. It has become something. or,
Even when the engine 10 is stopped, the brake pedal 27
By operating the operation lever 29 integrally formed with the brake mechanism 2
By keeping the brake 3 in the braking state, the phenomenon that the vehicle body moves by its own weight can be prevented. Since the respective operation systems are composed of the wires 28 and 39, even if one of them is operated, the other wire is loosened. This ensures that the operating force from one does not affect the system on the other.

[Other Embodiments] In addition to the above-described embodiment, the present invention can be provided with, for example, an electric motor for operating a reaping clutch. It is also possible to apply.

[0017]

As a result, a combine for preventing the movement of the vehicle body due to its own weight even when the engine is stopped while the vehicle body is stopped on the slope is rationally constructed.

[Brief description of the drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a front view schematically showing a transmission system of a transmission case.

FIG. 3 is a schematic front view of a mission case.

FIG. 4 is a side view of the transmission system in a state in which the cutting clutch is engaged.

FIG. 5 is a side view of the transmission system when the cutting clutch is in a disengaged state.

FIG. 6 is a hydraulic circuit diagram for controlling traveling speed and a cylinder mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling device 23 Braking device 39 Operating mechanism A Running vehicle body B Cutting pre-processing unit J Clutch mechanism

Claims (1)

[Claims] A braking device capable of switching between a braking state in which a braking force is applied to a traveling device and a non-braking state in which the braking force is released is provided, and power is supplied to a mowing pre-processing portion provided in a front portion of the traveling vehicle body. A combine comprising an operating mechanism that sets the braking device to a braking state with the operating force when the clutch mechanism transmits the disengagement operation, and sets the braking device to the non-braking state with the operating force when the clutch mechanism is engaged when the clutch mechanism is engaged. .