JPH0325029A - Transmission for driving combine or the like - Google Patents

Abstract

PURPOSE:To make a drive transmission case compact by coaxially disposing a drive shaft of a continuously variable transmission (CVT) and an output shaft for taking power outside and incorporated in the drive transmission case so as to constitute a transmission of two-shaft configuration. CONSTITUTION:A drive shaft 3 of a continuously variable transmission (CVT) 2 and a transmission gear 19 spline-fit over the drive shaft 3 are freely rotatably journaled on one side in a transmission case 1. On the inner end side of the drive shaft 3 are disposed the drive gear 19 and an output shaft 6 freely rotatably journaled on the other side in the transmission case 1 coaxially with the drive shaft 3. A reduction shaft 4 is journaled freely rotatably above the output shaft 6. An intermediate shaft 16, a clutch shaft, right and left pair of running shafts are freely rotatably journaled in the lower part of the transmission case. A gear 24 meshed with the transmission gear 19 driven with the drive shaft 3 is disposed on one side of the reduction shaft 4. On the other side of the reduction shaft 4 is disposed a wide reduction gear 25 constantly meshed with a running speed changing gear 20 of the output shaft 6 so that the rotation of the drive shaft 3 is reduced and transmitted to the output shaft 6.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a traveling transmission device for combine harvesters and the like, and can be used not only for combines but also for tractors, transport vehicles, and the like.

Problems to be Solved by the Prior Art and the Invention For example, in a traveling transmission device that transmits the left and right traveling devices of a combine harvester, input from the prime mover side is applied to the outside of one side of the upper end of the traveling transmission case in which the traveling transmission device is installed. A continuously variable transmission is provided with a drive shaft that transmits power and outputs continuously variable speed, and the drive shaft is spline-fitted to an input shaft that is rotatably supported within a traveling transmission case and interlocked so as to interlock with each other. An output pulley is provided to take out the power from the output shaft, which is decelerated from the input shaft via the deceleration shaft and transmitted to the traveling transmission.
Power is transmitted from this output pulley to a reaping device that reaps the grain culms.

In this way, a reduction shaft is provided between the input shaft and the output shaft, and in a three-shaft transmission configuration, the traveling transmission case that houses these components becomes large, making it difficult to arrange it compactly. Therefore, the present invention aims to downsize the traveling transmission case and achieve a compact arrangement by using a two-shaft transmission configuration.

Means for Solving the Problems This invention provides a traveling transmission case (within which a traveling transmission device is housed).
1) Externally on one side of the upper end is a drive shaft (3) of a continuously variable transmission (2) that receives input from the prime mover and outputs continuously variable speed.
), and deceleration is transmitted from the drive shaft (3) via the deceleration shaft (4) to the other side of the traveling transmission case (1).
A traveling transmission device such as a combine harvester has an output shaft (6) that has an output pulley (5) for taking out power and transmits variable speed transmission to the traveling transmission device, and is provided coaxially with the drive shaft (3). ．． When input power is transmitted from the working engine side of the invention to the continuously variable transmission (2),
Continuously variable speed output is sent to the drive shaft (3) of this continuously variable transmission (2), and from this drive shaft (3) to the output shaft (6) via the reduction shaft (4) inside the traveling transmission case (1). Deceleration is transmitted,
The variable speed is transmitted from this output shaft (6) to the traveling transmission device in the traveling transmission case (1). An output proportional to the rotational speed of the drive shaft (3) can be taken out from an output pulley (5) provided outside the output shaft (6) on the other side of the traveling transmission case (1).

Effect of invention Continuously variable transmission 1! Since the drive shaft (3) of +21 and the output shaft (6) inside the traveling transmission case (1) that takes power to the outside are installed on the same axis, the input from the drive shaft (3) as in conventional technology. The transmitted input shaft can be eliminated. Therefore, the upper end side of the traveling transmission case (1) can be lowered, and the traveling transmission case (1) can be downsized and have a compact configuration. Moreover, the output shaft (
Since the rotation of the drive shaft (3) is decelerated and transmitted to the output shaft (6), a hydrostatic transmission is used as the continuously variable transmission (2). When used, it is possible to input at high speed rotation, so the output can be increased and the capacity of the hydrostatic transmission can be increased. Embodiment The illustrated example shows a combine harvester equipped with a traveling transmission device according to the present invention, and a chassis (
8) Reaping device 5 to reap the grain culm at the upper front! (I1 is provided, and a threshing device (9) is installed at the rear for receiving and threshing the grain culms that are harvested and transferred by this reaping device [(It).

A prime mover 0υ is mounted on the chassis <8>, and this prime mover flu
) A traveling transmission case (1) is provided at the front of the chassis (8), and is equipped with a traveling transmission device that transmits input power from the left and right traveling devices (7).

Reaping device (IllI is a grain culm pulling device (l8), grain culm raking device (13, cutting blade equipment lit 04). The structure is equipped with a transfer device (19, etc.) that transfers the grain to the threshing device (9) at the rear, and can be freely raised and lowered by expanding and contracting the lifting cylinder 0υ around the horizontal axis provided on the mounting base at the top of the traveling transmission case (1). It is said that

A continuously variable transmission device (2) is attached to the outside of one side of the upper end of the traveling transmission case (1), which transmits power from the prime mover (Ill) via an input coupler (to) and outputs continuously variable speed.

This continuously variable transmission (2) is a hydrostatic transmission in which the hydraulic motor is continuously variable in the forward and reverse directions by changing the inclination angle of the swash plate of the hydraulic pump using the travel lever (II3). The drive shaft (3 parts) protrudes into the traveling transmission case (1), which outputs variable speed output.
) has a transmission gear (FJ) that is spline-fitted with the transmission shaft (3) of the L-speed transmission {2} and transmits power, and is rotatably mounted inside one side of the traveling transmission case (1). On the inner end side of the drive shaft {3), there is a transmission gear (output @ rotatably bearing inside the other side of the traveling transmission case fil).
(B) is provided coaxially with the drive@(3).

The output shaft (6) is fitted with a spline and can freely slide on the shaft. O, high speed gear +
211 and a low speed gear Qδ are integrally provided, and the output shaft (6) is provided with an output pulley (5) for extracting power from the outside of the traveling transmission case (1). output pulley (5
) to the reaping device M (I1) is configured to be belt-transmitted.The output pulley (5) is equipped with a one-way clutch that transmits rotation only when the output shaft (6) rotates in the normal direction.

In the traveling transmission case (11), a reduction shaft (4) is rotatably supported on the upper part of the output shaft (6), and an intermediate shaft +11 is mounted in the f section.
19. A clutch shaft, a pair of left and right running shafts, etc. are rotatably supported.

A transmission gear (104L) that meshes with the drive shaft (3) of the continuously variable transmission (2) is provided on one side of the gear (4), and the output shaft (6) is installed on the other side. A wide-range reduction gear C25) that is constantly meshed with the traveling speed change gear (to) is installed (''J,
The rotation of the cantering shaft (3) is decelerated and transmitted to the output shaft (6).

The intermediate shaft the output shaft (6) has a low speed change gear (6), a high speed change gear (ffl1), and a traveling speed change gear (
low speed gear (21.
), and a travel speed gear 14, and a transmission gear (
). These transmission gears are set by the transmission shifter to 12 () G! +
1 (by sliding 2a on the output shaft (6),
This is a configuration in which the traveling device (7) is transmission-driven by switching from the transmission gear (to) to low speed, high speed, and traveling speed.

At the travel speed shift position where the travel speed change gear -121 meshes with the travel speed gear -ce, the change gear (21 12+) C2B is moved by push 03 to the output shaft (6) so that the transmission is not transmitted to the output shaft (6). 6), the structure is rotatable. From the prime mover (10) to the input coupler 12 of the continuously variable transmission (2)
1, the drive shaft (3) is rotated at a continuously variable speed, and the rotation of the drive shaft (3) is transmitted at a reduced speed to the output shaft (6) via the deceleration shaft (4). The reaping device (10) is driven by a rotation proportional to the rotation of the drive shaft (31) from the output pulley (5) of this output shaft (6).

Shift gear - 120G! 11 By shifting K2 and i5, the traveling device (7) is switched between traveling speed, low speed, and high speed, and is also continuously variable forward and backward by the continuously variable transmission device (2). When the speed is changed to the traveling speed, the reaping device 0ω stops because no power is transmitted to the output shaft (6). Therefore, when the output shaft (6) stops rotating during traveling, the traveling transmission case (1)
Since this can be done within the same area, the structure is simple and the operability can be improved.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, with Fig. 1 being a front view partially cut away, and Fig. 2 being a side view of the front part of the combine. In the figure, the code (1) is the running transmission case, (2) is the continuously variable transmission, (3) is the drive shaft, (4) is the reduction shaft, (5) is the output pulley, and (6) is the output shaft. .

Claims (1)

[Claims] A drive shaft (3) of a continuously variable transmission (2) that receives input transmission from the prime mover and outputs continuously variable speed is provided on one side of the upper end of the traveling transmission case (1) housing the traveling transmission. Deceleration is transmitted from this drive shaft (3) via a reduction shaft (4), and the other side of the traveling transmission case (1) has an output pulley (5) for taking out the power and changing speed to the traveling transmission. A traveling transmission device such as a combine harvester, in which an output shaft (6) for transmitting power is provided coaxially with the drive shaft (3).