JPH0470169B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a walking management machine that incorporates a friction-type continuously variable transmission for traveling speed change.

[Conventional technology]

As such a walking control machine, the output from the engine is shifted by a belt-type continuously variable transmission, and the shifted output is transmitted through gear reduction mechanisms arranged in parallel at multiple positions in the vertical direction within the transmission case. There are some models in which the transmission is transmitted to the axle at the bottom of the transmission case after deceleration (for example, Jikosho's
No. 44-21926).

[Problem that the invention seeks to solve]

However, as mentioned above, when multiple gears are installed in parallel at multiple positions in the vertical direction within the transmission case, it is necessary to secure space to install the gears in parallel at the bottom of the transmission case. However, it was not possible to narrow the case width at the lower part of the transmission case, resulting in the following disadvantages.

Work using this type of walking type management machine includes, for example, intercultivation management work such as weeding between furrows and lifting soil into furrows. In that case, the aircraft will run between the furrows, but as mentioned above, if the case width at the bottom of the transmission case is large, it may be difficult to position the wheels that are pivoted at the bottom of the transmission case inward from each other. This not only makes it difficult to drive through narrow furrows, but also when supporting a tilling shaft or the like with a plurality of tilling claws in place of the wheels at the bottom of the mill case, it must be mounted on both insides. It is not possible to reduce the distance between the tilling claws,
This resulted in a large amount of residual tillage at the bottom of the case.

An object of the present invention is to improve the performance of intercultivation management work by narrowing the case width at the lower part of the transmission case in a form that can obtain a wide range of working speeds using a friction-type continuously variable transmission. The aim is to expand the scope of work by doing so.

[Means for solving problems]

The characteristic configuration of the present invention is that the power from the engine is transmitted from the input shaft of the transmission case to the axle of the traveling system via the friction type continuously variable transmission, and an intermediate transmission shaft is interlocked and connected to the input shaft. Through
In a walking management machine configured to branch transmission to a PTO shaft of a PTO system, a planetary reduction mechanism is attached to the input shaft of the transmission case, a sun gear of the planetary reduction mechanism is supported on the input shaft, and , the ring gear of the planetary reduction mechanism and the output shaft of the friction type continuously variable transmission are interlocked and connected via an idle gear loosely fitted to the intermediate transmission shaft, and further, the carrier of the planetary reduction mechanism and the axle are connected. The present invention is configured such that the output from the friction type continuously variable transmission to the traveling system is transmitted to the axle via the planetary reduction mechanism in an interlocking manner.

[Effect]

In other words, by providing a planetary reduction mechanism concentrically with the input shaft provided at the top of the transmission case into which the power from the engine is input, the output speed changed by the friction-type continuously variable transmission can be controlled. A planetary deceleration mechanism for deceleration can be housed in the upper part of the vertically long transmission case. or,
The support shaft of the idle gear that interlocks and connects the ring gear of the planetary reduction mechanism and the continuously variable transmission is the input shaft.
It also serves as an intermediate transmission shaft to connect the PTO shaft for deceleration.

〔Effect of the invention〕

Therefore, by configuring the speed reduction mechanism for reducing the speed-changed output from the continuously variable transmission as a compact planetary speed reduction mechanism, it is possible to save space for installing the speed reduction mechanism at the bottom of the transmission case. Since there is no need to install a milling case and the case width at the bottom of the milling case can be reduced, it is also advantageous in inter-tillage management work where work is carried out by running between furrows, and it is possible to expand the work range. I finally got a mold control machine.

〔Example〕

FIG. 3 shows a walking management machine of the present invention, which has an engine installed at the front of the machine.
A vertically long transmission case 2 is provided behind the engine 1, and a pair of left and right wheels 3, 3 are pivotally supported at the bottom of the transmission case 2, and a control handle 4 and a control handle for connecting a working device are provided at the rear of the machine. The transmission structure of this walking management machine will be explained below.

As shown in FIGS. 1 and 2, an output pulley 7 is fixed to the output shaft 6 of the engine 1, and an input pulley 9 is fixed to the first input shaft 8 protruding from one side of the transmission case 2. The belt 10 is wound over the belt transmission mechanism A with a tension main clutch.
has been configured. Further, a split pulley 11 is fitted onto the first input shaft 8 so as to be located between the input pulley 9 and the transmission case 2. The split pulley 13 externally fitted onto the second input shaft 12 and the belt 14
The outer movable pulley 11b, which is slidably movable with respect to the inner fixed pulley 11a of the split pulleys 11, is operated outward by a shift fork (not shown). The belt type continuously variable transmission device B is configured such that the higher the speed is, the higher the speed is. In addition, the shift fork is
It is operated by a control lever L provided on the control handle 4 side.

By providing the second input shaft 12 on the engine side with respect to the first input shaft 8, the common cover 15 for the belt transmission mechanism A and the belt type continuously variable transmission device B can be made smaller. It can be done.

When power from the engine 1 is input to the first input shaft 8, the input power is transferred to the intermediate transmission shaft 1.
The PTO system transmits the gear-reduced output to the PTO shaft 17 via the belt-type continuously variable transmission device B, and the belt-type continuously variable transmission device B transmits the gear-reduced output to the PTO shaft 17 via the belt-type continuously variable transmission device B. A transmission system within the transmission case 2 is comprised of a running system that transmits the output decelerated by a planetary reduction mechanism C equipped with a sun gear 18 to an axle shaft 19.
The transmission structures of the PTO system and travel system will be explained in detail.

PTO system transmission structure A large diameter gear 21 that meshes with a small diameter gear 20 fixed to the first input shaft 8 is fixed to one end of the intermediate transmission shaft 16, and a small diameter gear 22 fixed to the other end of the intermediate transmission shaft 16. A large-diameter gear 23 that engages with the first input shaft 8 is fixed to the PTO shaft 17 loosely fitted to constitute a PTO system gear reduction mechanism D, and the PTO shaft 17 is linked to the first input shaft 8 for deceleration. It is connected.

Transmission structure of the running system: The power input to the first input shaft 8 is shifted by the belt type continuously variable transmission device B, and the shifted output is transmitted from the second input shaft 12 via the chain transmission mechanism 24. The gear 25 is connected to the intermediate transmission shaft 16
It is loosely fitted. Then, a ring gear 26 consisting of internal and external gears that meshes with the idle gear 25 is loosely fitted onto the first input shaft 8, and a sun that meshes with the ring gear 26 and is externally fitted onto the first input shaft 8 is fitted loosely into the first input shaft 8. A planetary gear 27 that meshes with the gear 18 is freely rotatably supported by a carrier 28 that is fitted around the first input shaft 8 so as to be relatively rotatable, thereby forming a planetary reduction mechanism C. Further, the power outputted with the revolution speed of the planetary gear 27, that is, the rotation speed of the carrier 28 as the traveling speed, is transmitted to the transmission shaft 30 via the gear reduction mechanism 29, and then from the transmission shaft 30 to the chain transmission mechanism 3.
1 to the left and right axles 19, 19. Incidentally, each axle 19 is provided with a side clutch 32, so that the power transmitted to the axle 19 can be switched on and off.

The friction type continuously variable transmission device B may be of various types, such as a belt type, a disk type, or a tapered cone type.

[Brief explanation of drawings]

The drawings show an embodiment of the walking management machine according to the present invention, and FIG. 1 is a sectional view showing the transmission structure inside the transmission case, FIG. 2 is a side view showing the transmission part of the walking management machine, and FIG. The figure is an overall side view of the walking management machine. 1... Engine, 2... Mission case, 8
...Input shaft, 16...Intermediate transmission shaft, 17...
PTO axis, 18...Sun gear, 19...Axle, 2
5...Idle gear, 26...Ring gear, 28
...Carrier, B...Continuously variable transmission, C...Planetary reduction mechanism.

Claims (1)

[Claims] 1. The power from the engine 1 is transmitted from the input shaft 8 of the transmission case 2 to the axle 19 of the traveling system via the friction type continuously variable transmission B, and the input shaft The walking control machine is configured to branch and transmit power to a PTO shaft 17 of a PTO system via an intermediate transmission shaft 16 interlockingly connected to the transmission case 8, and a planetary reduction mechanism C is connected to the input shaft 8 of the transmission case 2. The sun gear 18 of the planetary reduction mechanism C is supported on the input shaft 8, and the ring gear 26 of the planetary reduction mechanism C and the output shaft 12 of the friction type continuously variable transmission device B are connected to the intermediate transmission shaft. The carrier 2 of the planetary reduction mechanism C is interlocked with the idle gear 25 loosely fitted to the
8 and an axle 19 are interlocked and connected to transmit an output from the friction type continuously variable transmission device B to the traveling system to the axle 19 via the planetary reduction mechanism C.