FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003


COMPLETE SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION An Improved Transfer Case mounting system for vehicles
APPLICANTS
TATA MOTORS LIMITED, an Indian company
having its registered office at Bombay House,
24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India
INVENTORS
Sanjay Sharma, Saswata Ranjan Das
Jayanta Bose, Mayank Verma
and Sabir Kumar Samad
AH are Indian Nationals
of TATA MOTORS LIMITED,
an Indian company having its registered office
at Bombay House, 24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India

PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed.


FIELD OF INVENTION
The present invention is related to the Transfer Case in vehicles which and more particularly it relates to an improved transfer case mounting system for vehicles.
BACKGROUND OF INVENTION
Transfer case in vehicle is required for transition from two wheel drive to four wheel drive. In practice transfer case is mounted through two mountings only. The transfer case is attached to long member with the help rubber pad and mounting bracket to transfer case. Since the Centre of Gravity of transfer case is lies quite below the existing mountings so the vibration, produced by varying speed of drive-line as well as transition from two-wheel-drive to four-wheel-drive in the system, is too high. The existing mounting arrangement of said transfer case is not suitable for minimizing the vibration and countering the torque produced by said varying speed of drive line and transition from two wheel to four wheel drive, becomes difficult. Further, while transmission layouting, the transfer case needs to be kept at certain angle to meet the required drive line angle. In existing mounting system of said transfer case, it is difficult to keep the said transfer case at certain angle. Since the required drive line angle is not achieved, this incurs undesirable vibration in drive-line.
In order to address the above disadvantages, the auxiliary transfer case mounting assembly is developed.
OBJECTS OF INVENTION
The main object of the present invention is to provide an improved transfer case mounting system for vehicles.
Another object of the present invention is to provide an improved transfer case mounting system for vehicles facilitating more stable mountings for transfer case by supporting CG from the lower side of the transfer case.

Another object of the present invention is to provide an improved transfer case mounting system for vehicles which counters the torque produced due to varying speed and reduce the vibration.
Yet another object of the present invention is to provide an improved transfer case mounting system for vehicles which keep the transfer case at certain angle to suit the transmission layout.
STATEMENT OF INVENTION
An improved transfer case mounting system for vehicles comprises; mounting means connecting upper portion of said transfer case to each long member of said vehicle, at least one transfer case mounting bracket mounted on each side of lower portion of said transfer case, a supporting bar assembly connecting said mounting bracket to cross member of said vehicle and said supporting bar assembly having a bar member and a pummer block assembly connected to both ends of said bar member.
An improved transfer case mounting system, in accordance with present invention, wherein said pummer block assembly having rubber bush disposed therein and pin passing therethrough for connecting to said bar member.
An improved transfer case mounting system, in accordance with present invention, wherein mounting bracket is connected to pummer block assembly by means of said pins passing through said rubber bush disposed in said pummer block assembly.
An improved transfer case mounting system, in accordance with present invention, wherein upper end of said supporting bar assembly is attached to said cross member by means of said pins passing through said rubber bush disposed in said pummer block assembly.

An improved transfer case mounting system, in accordance with present invention, wherein said upper and lower pummer block assemblies are bolted with nut and bolt arrangement.
An improved transfer case mounting system, in accordance with present invention, wherein said pins at both upper and lower ends of said bar member, are locked with the help of washer and external circlip.
An improved transfer case mounting system, in accordance with present invention, wherein said supporting bar assembly is assembled in such a manner that said bar member makes an angle less than 45° with the vertical.
An improved transfer case mounting system, in accordance with present invention, wherein said supporting bar assembly create two reaction force component in -Z as well as +X direction to counter the torque generated during transition from a two-wheel-drive to four-wheel-drive and varying speed of drive line.
BRIEF DESCRIPTION OF INVENTION
In accordance with the present invention, an improved transfer case mounting system for vehicles comprises; mounting means connecting upper portion of said transfer case to each long member of said vehicle, at least one transfer case mounting bracket mounted on each side of lower portion of said transfer case, a supporting bar assembly connecting said mounting bracket to cross member of said vehicle and said supporting bar assembly having a cylindrical bar member and a pummer block assembly connected to both ends of said bar member.
Said supporting bar assembly having a cylindrical bar member (10), a pummer block assembly (12) at both ends of said bar, rubber bush (13) disposed in said pummer block assembly (12) and is bolted with nut and bolt arrangement, said supporting bar assembly is locked by using washer (14) and external circlip (15) on the pins (11) at both ends of said supporting bar assembly.

one end of said supporting bar assembly is attached to the lower end of said transfer case (5) with the help of said mounting bracket (9) and other end of said supporting bar assembly is attached to said cross member (8) by means of said pummer block assembly(12),said pins (11) and said rubber bush (13).
Said supporting bar assembly is assembled in such a manner that it makes an angle less than 45° with the vertical. The said supporting bar assembly create two reaction force component in -Z as well as +X direction to counter the torque generated during transition from a two-wheel-drive to four-wheel-drive and varying speed of drive line.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 shows the conventional mounting system for transfer case.
FIG. 2 shows the auxiliary mounting system in accordance with the invention.
FIG. 3 shows perspective view of auxiliary mounting system in accordance with
the invention.
FIG. 4 shows detailed sectional view of auxiliary mounting system.
FIG. 5 shows exploded view of auxiliary mounting system in accordance with the
assembly process.
DETAILED DESCRIPTION OF INVENTION
Referring now to the drawings wherein the showings are for the purpose of illustrating a preferred embodiment of the invention only, and not for the purpose of limiting the same.
Now refering to figure-01-05, In accordance with the present invention, an improved transfer case mounting system for vehicles comprises; mounting means connecting upper portion of said transfer case to each long member of said vehicle, at least one transfer case mounting bracket mounted on each side of lower portion of said transfer case, a supporting bar assembly connecting said mounting bracket

to cross member of said vehicle and said supporting bar assembly having a cylindrical bar member and a pummer block assembly connected to both ends of said bar member.
said supporting bar assembly having a bar member (10), a pummer block assembly (12) at both ends of said bar, rubber bush (13) disposed in said pummer block assembly (12) and is bolted with nut and bolt arrangement, said supporting bar assembly is locked by using washer (14) and external circlip (15) on the pins (11) at both upper and lower ends of said supporting bar assembly.
one end of said supporting bar assembly is attached to the lower end of said transfer case (5) with the help of said mounting bracket (9) and other end of said supporting bar assembly is attached to said cross member (8) by means of said pummer block assembly(12),said pins (11) and said rubber bush (13). Said supporting bar assembly (10) is assembled in such a manner that it makes an angle less than 45° with the vertical. The said supporting bar assembly create two reaction force component in -Z as well as +X direction to counter the torque generated during transition from a two-wheel-drive to four-wheel-drive and varying speed of drive line.
Refering to figure-01, the transfer case (5) is mounted on long members (1,2) with the help of transfer mounting bracket (3,4) of said long members. Rubber mounting pad (6) is disposed in between the transfer mounting bracket (3 & 4) of said long members and mounting bracket (7) of transfer case, in order to minimize vibration.
Now refering to figure-02, which shows the mounting of said transfer case at upper and lower end. The upper end of said trnasfer case is connected to long members with the help of rubber mounting pad (6) and mounting bracket (7). The lower end of the said transfer case (5) of mounted with the help of transfer case mounting bracket (9) which is connected to the lower end of said supporting bar assembly. The upper end of said supporting bar assembly is connected to said cross member (8) which is connected to long members(l,2).

The upper end of said supporting bar assemblies are connected to said cross member (8) with the help of Pins (11), said pummer block assembly (12) said rubber bush (13), said washer (14) and circlips (15).
The lower end of said supporting bar assemblies are connected to the transfer case mounting bracket (9) with the help of said Pins (11), said pummer block assembly (12) said rubber bush (13), said washer (14) and circlips (15).
Now refering to figure-03, which shows the isometric view of the auxiliary transfer case mountings. The upper and lower end of said supporting bar assembly is connected to said cross member (8) and transfer case mountng bracket (9) respectivley. The upper end of said transfer case is mounted on long members (1,2) with the help of mounting means (3, 4) and of mounting bracket (7). Said cross member (8) provided for attaching upper end of the said supporting bar assembly, is mounted on the said long members. Upper end of both supporting bar assembly is mounted on said cross member with the help of pins (11), said pummer block assembly (12), said rubber bush (13), said washer (14) and external circlips (15).
Now refering to figure-04 & 05, the upper portion of the said transfer case (5) is mounted with the help mounting means (3,4), at least two rubber pads sandwitched between the said mounting means (3,4) and the mounting bracket (7) of said bothe long members, for dampening the vibrations. Said supporting bar assembly is assembled in such a manner that the each of said bar members(lO) makes an angle of 45° with the vertical. It will create two reactive force components in -Z as well as +X direction to counter the torque generated during transition from a two-wheel-drive to four-wheel-drive and varying speed of drive line.
The upper and lower joint of said supporting bar assembly allows the rotations to counter the torque generated during transition from a two-wheel-drive to four-wheel-drive and varying speed of drive line.

Supporting bar assembly (10) is locked by using washer (14) and external circlip (15) on the pins (11).
Supporting bar assembly (10) is assembled in such a manner that it makes an angle of 45° with the vertical to counter the torque generated during transition from a two-wheel-drive to four-wheel-drive and varying speed of drive line.
The said rubber bush (13) disposed in the said pummer block assembly (12) between transfer case mounting bracket (9) and said pin (11) provides flexibility in the system which prevents failure in the system.
As per the test results, the said improved auxiliary transfer case mounting said system reduces 30-40% vibration level in the system. That will increase the life of rubber pad as well as transmission system.
The foregoing description is a specific embodiment of the present invention. It should be appreciated that this embodiment is described for purpose of illustration only, and that numerous alterations and modifications may be practiced by those skilled in the art without departing from the spirit and scope of the invention. It is intended that all such modifications and alterations be included insofar as they come within the scope of the invention as claimed or the equivalents thereof.

WE CLAIM
1. An improved transfer case mounting system for vehicles comprises; mounting means connecting upper portion of said transfer case to each long member of said vehicle, at least one transfer case mounting bracket mounted on each side of lower portion of said transfer case, a supporting bar assembly connecting said mounting bracket to cross member of said vehicle and said supporting bar assembly having a bar member and a pummer block assembly connected to both ends of said bar member.
2. An improved transfer case mounting system as claimed in claim 1, wherein said pummer block assembly having rubber bush disposed therein and pin passing therethrough for connecting to said bar member.
3. An improved transfer case mounting system as claimed in claim 1, wherein mounting bracket is connected to pummer block assembly by means of said pins passing through said rubber bush disposed in said pummer block assembly.
4. An improved transfer case mounting system as claimed in claim 1, wherein upper end of said supporting bar assembly is attached to said cross member by means of said pins passing through said rubber bush disposed in said pummer block assembly.
5. An improved transfer case mounting system as claimed in claim 1, wherein said upper and lower pummer block assemblies are bolted with nut and bolt arrangement.
6. An improved transfer case mounting system as claimed in claim 1, wherein said pins at both upper and lower ends of said bar member, are locked with the help of washer and external circlip .

7. An improved transfer case mounting system as claimed in claim 1, wherein said supporting bar assembly is assembled in such a manner that said bar member makes an angle less than 45° with the vertical.
8. An improved transfer case mounting system as claimed in claim 1, wherein said supporting bar assembly create two reaction force component in -Z as well as +X direction to counter the torque generated during transition from a two-wheel-drive to four-wheel-drive and varying speed of drive line.
9. An improved transfer case mounting system for vehicles as herein described and illustrated with reference to accompanying description and drawings.