Claims:WE CLAIM:
1. An integrated power take-off transmission assembly (1) for a working vehicle, said integrated power take-off transmission assembly (1) comprising of:
a) an first input shaft (3) to which power is directly transmitted from an engine (2);
b) a output shaft (5) arranged on a downstream side in a transmission direction of said first input shaft (3);
c) a clutch unit (4) for selectively performing power transmission/power interruption from said first input shaft (3) to said output shaft (5);
d) a first transmission case (6) for supporting said first input shaft (3) and said output shaft (5) and for accommodating said clutch unit (4);
e) an second input shaft (9) accommodated in a second transmission case (7) to which power is transmitted from the engine (2) through an vehicle speed transmission mechanism (8) with a main clutch;
f) two gear shafts (10a, 10b) are arranged perpendicular to the second input shaft (9) and output shaft (5) respectively for transferring power from said second input shaft (9); and
g) a shifting mechanism (11) which includes two sleeves (12a, 12b) and a shifting lever, wherein said two sleeves (12a, 12b) are arranged perpendicular to both sides of the first input shaft (3), wherein the shifting lever is connected to second sleeve (12b) for selecting power transmission/power interruption from said first input shaft (3) and second input shaft (9) to said output shaft (5) according to the user requirement.

2. The integrated power take-off transmission assembly (1) as claimed in claim 1, wherein for engaging power from the first input shaft (3), the operator shift the shifting lever towards said first input shaft (3) to enable oil to flow to the clutch unit (4) through a switch and engine (2) power is transferred to the output shaft (5).

3. The integrated power take-off transmission assembly (1) as claimed in claim 1, wherein for engaging power from the second input shaft (9), the operator depress the main clutch and then shift the shifting lever towards said second input shaft (9) and select the corresponding speed gears from the vehicle speed transmission mechanism (8) to transfer power to the output shaft (5).

4. The integrated power take-off transmission assembly (1) as claimed in claim 1, wherein said first input shaft (3) is a live / IPTO shaft.

5. The integrated power take-off transmission assembly (1) as claimed in claim 1, wherein said second input shaft (9) is a variable speed / multi speed transmission shaft.

6. The integrated power take-off transmission assembly (1) as claimed in claim 1, wherein said output shaft (5) is a power take-off shaft.

7. The integrated power take-off transmission assembly (1) as claimed in claim 1, wherein the clutch unit (4) is hydraulic clutch.

8. The integrated power take-off transmission assembly as claimed in claim 1, wherein the working vehicle is an agricultural vehicle.

Dated this 17th day of June 2020

, Description:INTEGRATED POWER TAKE-OFF TRANSMISSION ASSEMBLY FOR A WORKING VEHICLE
FIELD OF INVENTION
The present invention relates to the field of transmission system in automotive vehicles. More particularly, the present invention relates to an integrated power take-off transmission assembly for a working vehicle, which has Independent Power take off (IPTO)/Live PTO and Multi-Speed Power Take off (MSPTO) in a single transmission system, thereby enabling the driver to operate the Live PTO & MSPTO with a single Lever and ease like regular vehicle. The working vehicle is an agricultural vehicle such as tractor or farm vehicle.
BACKGROUND OF INVENTION
Generally, vehicles such as agricultural and/or lawn and garden tractors are commonly provided with a PTO shaft that is used to drive attachments such as snow blowers, power brooms and drawn implements which require a powered drive input. Most commonly, the PTO shaft is a splined drive shaft installed on a tractor or truck allowing implements with mating fittings to be powered directly by the engine. The PTO is only working when the tractor's clutch is released, so if you take the tractor out of gear while slowing down the PTO will stop working. This is a disadvantage in applications such as mowing.
Typically, the PTO shafts are provided with a clutch that is operated by the hydraulic system of the tractor. When the PTO shaft is not being used to drive an attachment or implement, the clutch is disengaged and the shaft is not powered. When the clutch is disengaged, the vehicle hydraulic system continues to operate and hydraulic fluid flows through the system, producing small residual torques on the drive components for the PTO shaft. Consequently, even though the torques is small, the PTO shaft may continue to slowly turn when the clutch has been disengaged. When an operator wants to connect an attachment or implement to the PTO shaft, such inadvertent rotation of the PTO shaft could prove troublesome.
Conventionally, live PTO works with the use of a two-stage clutch. Pressing the clutch half-way will disengage the transmission while pressing it fully will disengage the transmission and the PTO. This allows the operator to slow down or change gears while the PTO is still operating.
An independent PTO means that the PTO shaft is controlled with a separate clutch. As with the live PTO, this allows for full control over the tractor while separately controlling the PTO. There are two major types of independent PTO; mechanical and hydraulic. A mechanical-independent PTO uses a separate on-off selector, in addition to the PTO control lever. Often the tractor must be stopped or off to change this selector position. A hydraulic-independent PTO uses a single selector.
In existing power take-off transmission assembly, the LIVE PTO & MSPTO are given as default option. So the operator needs to depress clutch and shift either LIVEPTO or MSPTO. For IPTO option, if we fix the regular IPTO, for engaging IPTO, the operator needs to switch on button to enable oil to flow to IPTO. However, to shift to MSPTO, the operator needs to depress main vehicle clutch and then shift to MSPTO. Because of this constraint & layout constraint, the IPTO is not given till now with MSPTO option.
Some of the prior arts are:
US Patent document 3733912 discloses a transmission comprising a primary speed change mechanism including a main shaft provided with a plurality of gears for power transmission, an upper counter shaft and a lower counter shaft disposed in parallel on the opposite sides of the main shaft, the upper counter shaft being provided with a group of speed change gears for running the tractor, the lower counter shaft being equipped with a group of speed change gears for power takeoff.
JP Patent document 4392185 discloses a travelling speed change device furnished with an auxiliary speed change device and constituted to take off the PTO output from a transmission route on the front side of the auxiliary speed change device and a PTO speed change device is provided on the downstream side of a PTO shifter which is a portion to which power is input through the power transmission mechanism from an auxiliary speed change input shaft in constitution of the power transmission device of a tractor furnished with a route to transmit power to a PTO shaft through the travelling speed change device from an output shaft of an engine and a route to directly transmit power to the PTO shaft from the output shaft of the engine.
JP Patent document 5345108 discloses a travel main shaft and a PTO main shaft, which are disposed dividedly at both side lateral positions with the shaft core of an input shaft sandwiched, a travel counter shaft receiving power from the travel main shaft is disposed on the lower side from the travel main shaft, the PTO counter shaft receiving power of the PTO main shaft side is disposed on the lower side from the PTO main shaft, a PTO clutch is provided on the PTO counter shaft and a PTO transmission input shaft transmitting power to a PTO transmission mechanism is provided on the upper part from the PTO counter shaft.
All of the above cited prior-art deals with a power take-off transmission assembly, which requires multiple transmission system to operate the IPTO/Live PTO & MSPTO with multiple lever shifting. Accordingly, there exists a need for an integrated power take-off transmission assembly for a working vehicle, which has IPTO/Live PTO and MSPTO in a single transmission system, thereby enabling the driver to operate the Live PTO & MSPTO with a single Lever and ease like regular vehicle.
The information disclosed in this background of disclosure section is only for enhancement of understanding of the general background of the invention and should not be taken as acknowledgement or any form of suggestion that this information forms the prior art already known to person skilled in the art.
OBJECTS OF INVENTION
One or more problems of the conventional prior art may be overcome by various embodiment of the present invention.
It is the primary object of the present invention to provide an integrated power take-off transmission assembly for a working vehicle, which has IPTO/Live PTO and MSPTO in a single transmission system, thereby enabling the driver to operate the Live PTO & MSPTO with a single Lever and ease like regular vehicle.
Yet another object of the present invention to provide an integrated power take-off transmission assembly for a working vehicle, which enable operator to shift easily without interrupting vehicle speed.
Another objective of the present invention is to provide an integrated power take-off transmission assembly for a working vehicle, which can get the multiple speed PTO RPM for high speed external application by easy shifting using normal clutch.
Yet another object of the present invention is to provide a IPTO/Live PTO and MSPTO in single transmission system with cost effective design.
These and other objects and advantages of the present subject matter will be apparent to a person skilled in the art after consideration of the following detailed description taken into consideration with accompanying drawings in which the preferred embodiment of the present subject matter are illustrated.
SUMMARY OF THE INVENTION
One or more drawbacks of the conventional power take-off transmission assembly and the additional advantages provided though the present invention relates to an integrated power take-off transmission assembly for a working vehicle, which has IPTO/Live PTO and MSPTO in a single transmission system, thereby enabling the driver to operate the Live PTO & MSPTO with a single Lever and ease like regular vehicle.
In an embodiment of the present subject matter relates to integrated power take-off transmission assembly for a working vehicle, comprising of: an first input shaft to which power is directly transmitted from an engine; a output shaft arranged on a downstream side in a transmission direction of said first input shaft; a clutch unit for selectively performing power transmission/power interruption from said input shaft to said output shaft; a first transmission case for supporting said input shaft and said output shaft and for accommodating said clutch unit; an second input shaft accommodated in a second transmission case to which power is transmitted from an engine through an vehicle speed transmission mechanism with a main clutch; two gear shafts are arranged perpendicular to the second input shaft and output shaft respectively for transferring power from second input shaft; and a shifting mechanism which includes two sleeves and a shifting lever, wherein said two sleeves are arranged perpendicular to both sides of the first input shaft, wherein the shifting lever is connected to second sleeve for selecting power transmission/power interruption from said first input shaft and second input shaft to said output shaft according to the user requirement.
For engaging power from the first input shaft, the operator shift the shifting lever towards said first input shaft to enable oil to flow to the clutch unit through a switch and engine power is transferred to the output shaft.
For engaging power from the second input shaft, the operator depress the main clutch and then shift the shifting lever towards said second input shaft and select the corresponding speed gears from the vehicle speed transmission mechanism to transfer power to the output shaft.
In the preferred embodiment of the present invention, the first input shaft is a live / independent transmission shaft.
In the preferred embodiment of the present invention, the second input shaft is a variable speed / multi speed transmission shaft.
To further understand the characteristics and technical contents of the present subject matter, a description relating thereto will be made with reference to the accompanying drawings. However, the drawings are illustrative only but not used to limit scope of the present subject matter.
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 illustrates the integrated power take-off transmission assembly for a working vehicle according to the present invention.
Figure 2 illustrates the block diagram of the integrated power take-off transmission assembly for a working vehicle according to the present invention.
DETAILED DESCRIPTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS
The present invention as embodied by an "Integrated power take-off transmission assembly for a working vehicle" succinctly fulfills the above-mentioned need[s] in the art. The present invention has objective[s] arising as a result of the above-mentioned need[s], said objective[s] being enumerated below. In as much as the objective[s] of the present invention are enumerated, it will be obvious to a person skilled in the art that, the enumerated objective[s] are not exhaustive of the present invention in its entirety, and are enclosed solely for the purpose of illustration. Further, the present invention encloses within its scope and purview, any structural alternative[s] and/or any functional equivalent[s] even though, such structural alternative[s] and/or any functional equivalent[s] are not mentioned explicitly herein or elsewhere, in the present disclosure. The present invention therefore encompasses also, any improvisation[s]/modification[s] applied to the structural alternative[s]/functional alternative[s] within its scope and purview. The present invention may be embodied in other specific form[s] without departing from the essential attributes thereof.
Throughout this specification, the use of the word "comprise" and variations such as "comprises" and "comprising" may imply the inclusion of an element or elements not specifically recited.
The present invention is thus directed to an integrated power take-off transmission assembly for a working vehicle, which has IPTO/Live PTO and MSPTO in a single transmission system, thereby enabling the driver to operate the Live PTO & MSPTO with a single Lever and ease like regular vehicle.

Referring to Figures 1 to 2, in an embodiment of the present invention, the integrated power take-off transmission assembly (1) for a working vehicle, said integrated power take-off transmission assembly (1) comprising of: an first input shaft (3) to which power is directly transmitted from an engine (2); a output shaft (5) arranged on a downstream side in a transmission direction of said first input shaft (3); a clutch unit (4) for selectively performing power transmission/power interruption from said first input shaft (3) to said output shaft (5); a first transmission case (6) for supporting said first input shaft (3) and said output shaft (5) and for accommodating said clutch unit (4); an second input shaft (9) accommodated in a second transmission case (7) to which power is transmitted from the engine (2) through an vehicle speed transmission mechanism (8) as shown in Figure 2 with a main clutch (Not shown); two gear shafts (10a, 10b) are arranged perpendicular to the second input shaft (9) and output shaft (5) respectively for transferring power from said second input shaft (9); and a shifting mechanism (11) which includes two sleeves (12a, 12b) and a shifting lever (Not shown), wherein said two sleeves (12a, 12b) are arranged perpendicular to both sides of the first input shaft (3), wherein the shifting lever (Not shown) is connected to second sleeve (12b) for selecting power transmission/power interruption from said first input shaft (3) and second input shaft (9) to said output shaft (5) according to the user requirement.
In the preferred embodiment of the present invention, for engaging power from the first input shaft (3), the operator shift the shifting lever (Not shown) towards said first input shaft (3) to enable oil to flow to the clutch unit (4) through a switch and engine (2) power is transferred to the output shaft (5).
In the preferred embodiment of the present invention, for engaging power from the second input shaft (9), the operator depress the main clutch (Not shown) and then shift the shifting lever (Not shown) towards said second input shaft (9) and select the corresponding speed gears from the vehicle speed transmission mechanism (8) as shown in Figure 2 to transfer power to the output shaft (5).
In the preferred embodiment of the present invention, the first input shaft (3) is a live / independent transmission shaft.
In the preferred embodiment of the present invention, the said second input shaft (9) is a variable speed / multi speed transmission shaft.
In the preferred embodiment of the present invention, the output shaft (5) is a power take-off shaft.
In the preferred embodiment of the present invention, the clutch unit (4) is hydraulic clutch.
In the preferred embodiment of the present invention, the working vehicle is a agricultural vehicle.

EXAMPLE
Referring to Figures 1 to 2, the integrated power take-off transmission assembly (1) for a working vehicle, said integrated power take-off transmission assembly (1) comprising of: an first input shaft (3) to which power is directly transmitted from an engine (2); a output shaft (5) arranged on a downstream side in a transmission direction of said first input shaft (3); a clutch unit (4) for selectively performing power transmission/power interruption from said first input shaft (3) to said output shaft (5); a first transmission case (6) for supporting said first input shaft (3) and said output shaft (5) and for accommodating said clutch unit (4); an second input shaft (9) accommodated in a second transmission case (7) to which power is transmitted from the engine (2) through an vehicle speed transmission mechanism (8) as shown in Figure 2 with a main clutch (Not shown); two gear shafts (10a, 10b) are arranged perpendicular to the second input shaft (9) and output shaft (5) respectively for transferring power from said second input shaft (9); and a shifting mechanism (11) which includes two sleeves (12a, 12b) and a shifting lever (Not shown), wherein said two sleeves (12a, 12b) are arranged perpendicular to both sides of the first input shaft (3), wherein the shifting lever (Not shown) is connected to second sleeve (12b) for selecting power transmission/power interruption from said first input shaft (3) and second input shaft (9) to said output shaft (5) according to the user requirement.

In the preferred embodiment of the present invention, for engaging power from the first input shaft (3), the operator shift the shifting lever (Not shown) towards said first input shaft (3) to enable oil to flow to the clutch unit (4) through a switch and engine (2) power is transferred to the output shaft (5).
In the preferred embodiment of the present invention, for engaging power from the second input shaft (9), the operator depress the main clutch (Not shown) and then shift the shifting lever (Not shown) towards said second input shaft (9) and select the corresponding speed gears from the vehicle speed transmission mechanism (8) as shown in Figure 2 to transfer power to the output shaft (5).

In the preferred embodiment of the present invention, the first input shaft (3) is a live / IPTO shaft.

In the preferred embodiment of the present invention, the said second input shaft (9) is a variable speed / multi speed transmission shaft.

In live / independent transmission shaft option enable operator to shift easily without interrupting vehicle speed. Also, in live / independent transmission shaft option operator will get 540 PTO RPM for using standard 540 external implements.

In variable speed / multi speed transmission shaft option, operator can get the multiple speed PTO RPM which can be used for high speed external application by easy shifting the shifting lever (Not shown) towards said second input shaft (9) and select the corresponding speed gears from the vehicle speed transmission mechanism (8) as shown in Figure 2 to transfer power to the output shaft (5).

Thus, the integrated power take-off transmission assembly for a working vehicle according to the present invention has IPTO/Live PTO/MSPTO in a single transmission system, thereby enabling the driver to operate the Live PTO & MSPTO with a single Lever and ease like regular vehicle.

It will be apparent to the person skilled in the art that the above description is for illustrative purposes only should not be considered as limiting. Various modifications, additions, alterations, and improvements without deviating from the scope of the invention may be made by a person skilled in the art.