Claims:WE CLAIM:
1. A ventilation system for the vehicle transmission assembly, for removing the hot air contained therein during the operation of drive and clutch, comprises of:
a. a transmission housing (101);
b. a gear box housing (103), contained within the said transmission housing (101);
c. a clutch housing (102), positioned adjacent to the said gear box (103);
d. an air breather (104), having a first end (105a) and a second end (105b); and
e. a strainer (106) attached on the said first end (105a) and the said second end (105b) of the air breather, prevents the entry of dust particles into the transmission housing (101).

2. A ventilation system for the vehicle transmission assembly, as claimed in claim 1, wherein the said first end (105a) of the said air breather (104) is fastened to the said clutch housing (102); and wherein the said second end (105b) of the said air breather (104) is located outside the transmission housing (101).

3. A ventilation system for the vehicle transmission assembly, as claimed in claim 1 and claim 2, wherein the said first end (105a) of the air breather positioned in the said clutch housing (102) is optimized with respect to rotation of a flywheel inside the transmission housing (101).

4. A ventilation system for the vehicle transmission assembly, as claimed in claim 1 and claim 3, Wherein rotation of the said flywheel inside the transmission housing (101) creates air circulation resulting in centrifugal action, wherein the said optimized location of the first end (105a) of the air breather utilizes this centrifugal action to vent out the hot air into the atmosphere.

5. A ventilation system for the vehicle transmission assembly, as claimed in claim 1, wherein the said first end (105a) of the said air breather (104) is fastened to the said clutch housing (103) by means of plurality of nuts and bolts, by welding process, by flange connection, by means of rivet or other combination thereof.

6. A ventilation system for the vehicle transmission assembly, as claimed in claim 1, Wherein the said efficient air breather system vents out the heat generated in the transmission assembly, thereby reducing the temperature of clutch housing by 35% - 40%, this reduces the wear and tear rate of clutch pack and increases the lifetime of clutch pack.
, Description:A VENTILATION SYSTEM FOR A VEHICLE TRANSMISSION HOUSING
FIELD OF INVENTION
The present invention relates to vehicle transmission housing, in particular, the present invention relates to the ventilation system for the vehicle transmission housing, more particularly to an air breather system attached to the transmission housing for removing the hot air generated therein.
BACKGROUND OF THE INVENTION
Generally, transmission housing comprises a clutch assembly and transmission assembly. The heat produced by the clutch assembly due to frictional operation, increases the temperature in the transmission housing. In front-end loaders there are more engagements and disengagements of clutch resulting in high amount of heat generation. The heat produced during engagement of drive from the clutch is transferred to air surrounding it. The heat and the hot air remains inside the system reducing the clutch life. Due to increase in temperature of the housing, wear rate of clutch also increases and thus reducing the life of the clutch. Therefore, there exists a need in art to provide a provision of ventilation for the vehicle transmission housing to enable clutch cooling and increase the clutch life.
CN201010580364 provides an automobile clutch breather plug comprising a plug body and a plug shell which form a gas channel, wherein the top of the plug body is provided with a dust cover plate, and at least one lateral part is provided with a filtering gas grid. This clutch breather plug avoids high temperature rise of oil in the gear box and shortened gear box working life caused by friction heat of a clutch friction plate. Furthermore, also avoids abrasion of the clutch plate caused by the entrance of foreign matter.
EP82101293 discloses an air breather device for an automotive manual transmission system comprising of a transmission housing and a clutch cover which are made by monobloc casting. The said air breather device comprises a chamber communicating with the interior of the transmission housing and the open air by way of a port, which permits air introduction into the transmission from the open air or air discharge from the transmission into the open air in accordance with the pressure difference created between the inside of the transmission and the open air.
JP06372001 provides a breathing device for a wet clutch, which lets atmospheric air into a clutch case only when a pressure inside the clutch case becomes negative pressure, said closed wet clutch having a forced lubrication system pumping oil from a tank through a pump to a spray nozzle and a discharge oil system conveying oil from a fixed suction nozzle, which opens to oil pressurized onto an inner peripheral surface of the clutch case when the case rotates to the tank.
The cited prior-arts suffers many disadvantages such as insufficient cooling of the clutch pack, no provision for ventilation or removal of hot air in the transmission case and no proper positioning of the air breather in the transmission assembly. Many of the prior-art documents let in the atmospheric air into the transmission case due to negative pressure to enable clutch cooling, this bring lot of tiny dust particles into the transmission housing and creates problem in operation of the transmission and clutch assembly. Hence there is a need in art to provide an efficient air breather for the transmission assembly which removes the hot air generated in the transmission case to the atmosphere.
The present invention provides an ventilation system for the vehicle transmission housing to enable the escape of hot air produced in the transmission assembly during engagement of drive from the clutch, to the atmosphere. The present invention provides an efficient air breather system by providing sufficient cooling of the clutch packs, thereby reducing the clutch wear rate and increasing the clutch life. Further the positioning of the air breather is optimised with respect to the rotation of flywheel to provide the required cooling of the transmission assembly.
OBJECTIVE OF THE INVENTION
The primary objective of the present invention is to provide a ventilation system for the vehicle transmission housing that reduces the temperature inside the housing.
Another objective of the present invention is to provide an air breather system for the vehicle transmission assembly to remove the hot air generated inside the transmission housing during engagement of drive from the clutch.
Still another objective of the present invention is to provide an efficient air breather system for the vehicle transmission assembly, which increases the clutch life and reduces the clutch wear rate.
Yet another objective of the present invention is to optimize the positioning of the air breather with respect to the rotation of flywheel to provide the required cooling for the transmission assembly.
Final objective of the present invention is to prevent the entry of dust particles into the transmission assembly thereby enabling efficient operation of the transmission and clutch assembly.
SUMMARY OF THE INVENTION
The present invention provides a ventilation system for the vehicle transmission assembly for removing the hot air generated inside the transmission housing, comprises of: a transmission housing (101); a gear box housing (103); a clutch housing (102); and an air breather (104) with attached strainer (106), wherein the first end (105a) of the said air breather is located in the said clutch housing (102) by means of an housing, wherein the second end (105b) of the said air breather is located outside the transmission housing (101). The location of the said housing is optimized with respect to rotation of flywheel inside the transmission housing. The circulation of air due to the rotation of flywheel inside the transmission housing creates a centrifugal action, wherein the said optimized location of the first end (105a) of the air breather utilizes the centrifugal action to vent out the hot air into the atmosphere. The efficient air breather system of the present invention by venting out the heat generated, reduces the operating temperature of the clutch pack, thereby reducing the wear and tear rate of clutch pack and increasing the lifetime of clutch pack. The air breather system of the present invention reduces the temperature of clutch housing by 35% - 40%. Further, the said strainer (106) attached on the first end (105a) and the second end (105b) of the air breather system prevents the entry of dust particles into the transmission housing (101).
BRIEF DESCRIPTION OF THE DRAWING
Figure 1 depicts the ventilation system for the vehicle transmission housing.
Figure 2 shows the air breather design of the present invention.
While the invention is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
DETAILED DISCRIPTION OF THE INVENTION
The present invention as embodied by a ventilation system for a vehicle transmission housing, succinctly fulfils 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 spirit or 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 provides a ventilation system for the vehicle transmission assembly comprising of: a transmission housing (101); a gear box housing (103) contained within the said transmission housing (101); a clutch housing (102) positioned adjacent to the said gear box housing (103); and an air breather (104) with attached strainer (106), wherein the first end (105a) of the said air breather is located in the said clutch housing (102), wherein the second end (105b) of the said air breather is located outside the transmission housing (101).
In the preferred embodiment, wherein the said first end (105a) of the said air breather is fastened to the housing located in the said clutch housing (102) by means of plurality of nuts and bolts, by welding process, by flange connection, by means of rivet or other combination thereof.
In the preferred embodiment, Wherein the said housing for the said first end (105a) of the air breather located in the said clutch housing (102) is optimized with respect to rotation of flywheel inside the transmission housing. The circulation of air due to the rotation of flywheel inside the transmission housing creates a centrifugal action, wherein the said optimized location of the first end (105a) of the air breather utilizes the centrifugal action to vent out the hot air into the atmosphere.
In the preferred embodiment, wherein the said strainer (106) attached on the first end (105a) and the second end (105b) prevents the minute dust particles to enter the transmission housing (101).
The ventilation system for the vehicle transmission assembly of the present invention provided with an air breather system removes or escapes the hot air generated inside the transmission housing (101) during engagement of drive from the clutch. The efficient air breather system of the present invention by venting out the heat generated, reduces the operating temperature of the clutch pack, thereby reducing the wear and tear rate of clutch pack and increasing the lifetime of clutch pack.
The air breather system of the present invention reduces the temperature of clutch housing by 35% - 40%.
It will be apparent to a person skilled in the art that the above description is for illustrative purposes only and should not be considered as limiting. Various modifications, additions, alterations, and improvements without deviating from the spirit and the scope of the invention may be made by a person skilled in the art.

LIST OF REFRENCE NUMERALS
101. Transmission housing
102. Clutch housing
103. Gear box housing
104. Air breather
105a First end
105b second end
106. Strainer