JP2776282B2 - Traveling gear for mobile agricultural machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling device for a mobile agricultural machine such as a combine.

[0002]

2. Description of the Related Art Transmission cables
It is known that the left and right traveling devices transmitted through the steering clutch provided in the gear are configured to reversely transmit the steering device on the steering side by a spin gear or a spin clutch provided in the transmission device. I have. In this type of conventional device, a spin gear is meshed with a wheel gear of a wheel shaft which is output in conjunction with a traveling device which is mounted on a lower end portion of a traveling transmission case, but such a device has a reduction ratio. Since it is large and the rotation torque is large, it is necessary to increase the diameter of the spin clutch and the strength of the traveling transmission case.

[0003] The present invention is proposed in view of the above-mentioned disadvantages, and at the same time, simplifies the configuration of the transmission device in the transmission case and optimizes the layout of the transmission members to reduce the transmission case. It is intended to be lightweight and compact.

[0004]

For this reason, the present invention has taken the following technical measures. That is, a clutch gear 18 driven by receiving the rotational power of the engine is provided on the steering clutch shaft 4, and a steering clutch gear 3 that can be disengaged from the clutch gear 18 is provided on the left and right sides of the clutch gear 18. And a steering brake mechanism 20 for applying braking to the rotation of the steering clutch gear 3, and further below the transmission of the steering clutch shaft 4, the steering brake mechanism 20 is always engaged with the steering clutch gear 3 while being on the wheel shaft 2. A reduction gear 6 that supports a reduction gear 5 that applies reduced rotation power to the wheel gear 1 is supported by a shaft, and the steering brake mechanism 20 is operated to apply a brake to the rotation of the wheel shaft 2 in the turning direction. In the mobile agricultural machine configured to rotate the machine body, the counter gear 10 that meshes with the reduction gear 5 in the same direction on one side with the clutch gear 18 interposed therebetween, and the spin clutch 8 with the counter gear 10 on the opposite side. The Ngiya 7 provided, the counter gear 10 Supingiya 7
The counter gear 10 and the spin gear 7 are configured to be reversible by a reversing mechanism 21 and the spin gear 7 and the spin clutch 8
Are arranged so that the spin gear 7 is located inside the transmission case 12 with respect to the spin clutch 8.

[0005]

When the steering clutch gear 3 is engaged on the steering clutch shaft 4, the wheel gear 1 meshes with the reduction gear 5 via the reduction gear 5 on the reduction shaft 6 and rotates.
And the left and right traveling devices are driven and rotated. During such straight running, the spin clutch 8 is in the disengaged state, so that even if the spin gear 7 is rotated, the counter gear 10 is rotated.
There is no power transmission.

When turning the body, the steering clutch gear 3 in the turning direction is operated to be turned off. Then, the transmission of the reduction gear 5 and the wheel gear 1 to the steering device on the steering side is cut off, and the traveling direction is changed by the transmission of the traveling device by the steering clutch gear 3 on the opposite side. Further, when turning by a spin turn, the turning operation of the spin clutch 8 is performed together with the clutch disengagement of the steering clutch gear 3. At this time, the steering clutch gear 3 on the opposite side to the spin clutch 8 is in a rotational transmission state, and the wheel gear 1 on the same side is transmitted through the reduction gear 5 on this side for forward rotation. A counter gear 10 meshes with the reduction gear 5, and further passes through a reverse rotation mechanism 21, a spin clutch 8, a spin gear 7, and a reduction gear 5 on the steering clutch disengagement side, and rotates the traveling device in reverse through the wheel gear 1 on this side. Then, the turning steering by the spin turn is performed. Such a spin turn is similarly performed in the turning steering on the opposite side.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. The embodiment shown in FIG. 1 is applied to a combine, and the structure will be described with reference to FIG. 1. The hydraulic continuously variable transmission type HS driven by the power of the engine is provided above the traveling transmission case 12.
A T device is provided, and the input shaft 13 is connected to the output shaft 24,
A transmission gear 15 for auxiliary transmission is provided on the input shaft 13 so as to be slidable in the axial direction.
Are configured to slide. The rotation of the transmission gear 15 rotationally drives the clutch gear 18 on the steering clutch shaft 4 via the gear 17 on the transmission shaft 16 and the like. The HST device is configured to be capable of switching between forward and reverse rotation.

The steering clutch shaft 4 is provided below the transmission shaft 16 for transmission, and the reduction shaft 6 and the spin shaft 9 are provided below the steering clutch shaft 4 with their positions shifted back and forth, and the counter shaft 11 is provided. The wheel shaft 2 is provided below the deceleration shaft 6 between the speed reduction shaft 6 and the spin shaft 9. The steering clutch gear 3 on the steering clutch shaft 4 is rotatable around the steering clutch shaft 4 and moves by operating the steering shifter 19 in the axial direction, and is provided at the center of the steering clutch shaft 4. Power is transmitted by the engagement of the clutch gear 18 with the clutch portion, and the clutch can be disengaged by moving the steering clutch gear 3 outward.

At the outer end of the steering clutch shaft 4, a multi-plate steering brake mechanism 20 is provided, and each steering clutch gear 3 is moved further outward from the clutch disengaged position to provide the steering brake. The mechanism 20 is configured to be braked to brake the rotation from the steering clutch gear 3, the reduction gear, etc. on the steering clutch disengagement side to the traveling device. By adjusting the degree of effectiveness of the steering brake mechanism 20, steering can be easily performed.

The spin clutch 8 on the spin shaft 9 is constituted by a multi-plate type hydraulic clutch, which can be controlled by a pressure from a hydraulic circuit (not shown). The spin clutch 8 operates synchronously with the operation of the steering clutch gear 3. A spin gear 7 is disposed laterally inside the spin clutch 8, and the spin gear 7 is a reduction gear 5.
Is always engaged. When the spin clutch 8 is engaged, the spin gear 7 and the spin clutch 8 are integrated, and the rotational power of the counter gear 10 is transmitted to the reduction gear 5 via the gear 21 which is a reverse rotation mechanism. In this case, the steering clutch gear 3 is in the disengaged position, and the steering brake mechanism 20 is not operating, so that the steering clutch gear 3 is idle.

On one side of the spin shaft 9 and the counter shaft 11, a case detachably mounted on one side of the traveling transmission case 12.
A scuba cover 22 is provided, and one side of each of the shafts 9 and 11 is supported by this casing. This case cover 22
The spin clutch 8, the spin gear 7, and the like on the spin shaft 9 can be taken in and out from the opening portion 23 from which the shaft has been removed.

[0012]

The present invention is constructed as described above, and uses the reduction gear 5 for transmitting the rotational power for normal rotation to one traveling device as it is, and branches this rotational power from the middle. Since the rotation power on the reverse rotation side is applied to the reduction gear on the opposite side, the transmission mechanism for reversing the traveling device is simple, and the transmission torque of the spin clutch 8 is also small. The configuration of the entire apparatus can be made compact.

The positional relationship between the spin gear 7 and the spin clutch 8 is such that the spin gear 7 is located inside the transmission case 12 with respect to the spin clutch 8, so that The engagement with the spin gear 7 is performed at a position near the center of the transmission case 12, so that the width of the transmission case 12 is reduced as compared with the case where the spin clutch 8 is provided inside and the spin gear 7 is provided outside. be able to.

[Brief description of the drawings]

FIG. 1 is a front sectional view of the inside of a transmission case.

FIG. 2 is a side view of a transmission case with a partial cross section.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 wheel gear 2 wheel shaft 3 steering clutch gear 4 steering clutch shaft 5 reduction gear 6 reduction shaft 7 spin gear 8 spin clutch 9 spin shaft 10 counter gear

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60K 17/04 B62D 11/08 F16H 3/22 F16H 3/40 A01B 69/00

Claims (1)

(57) [Claims] A clutch gear, which is driven by receiving the rotational power of the engine, is provided on a steering clutch shaft. A clutch gear 3 and a steering brake mechanism 20 for applying a brake to the rotation of the steering clutch gear 3 are provided, respectively, and further below the transmission of the steering clutch shaft 4, the wheel is engaged with the steering clutch gear 3 while being constantly engaged therewith. By rotating a reduction shaft 6 that supports a reduction gear 5 that applies reduced rotational power to the wheel gear 1 on the shaft 2 and operating the steering brake mechanism 20, the rotation of the wheel shaft 2 in the turning direction is controlled. In a mobile agricultural machine configured to turn the body by applying a brake, a counter gear 10 meshing with the reduction gear 5 in the same direction on one side with the clutch gear 18 interposed therebetween, and a spin clutch on the other side. , The spin gear 7 is meshed with the reduction gear 5 on the opposite side of the counter gear 10, the counter gear 10 and the spin gear 7 are configured to be reversible by a reversing mechanism 21, and the spin gear 7 and the spin clutch And 8 wherein the spin gear 7 is disposed so that the spin gear 7 is located inside the transmission case 12 with respect to the spin clutch 8.