FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION Fifth Mounting Support On Gear Box 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
Mr. Pradip Kumar Dey and Mr. Sou Mandal Pranab K
Both 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 gear box mounting for a vehicles and more particularly it relates to fifth mounting support on gear box for vehicles.
BACKGROUND OF INVENTION
Generally the 'Fifth Mounting' in vehicle is essentially required to meet the bending moment value of engine block. Normally, fifth mounting limits the bending moment due to over hang load from engine block. This kind of arrangement suffers from one major drawback in that, when adjustment is required , normally it has to be done manually as per specified pre-load of spring provided therein and the said arrangement is not flexible enough to take care during articulation.
OBJECT OF INVENTION
The main object of the present invention is to provide fifth mounting support on gear box for vehicles.
Yet another object of the present invention is to provide fifth mounting support on gear box for vehicles which nullifies bending moment.
Yet another object of the present invention is to provide fifth mounting support on gear box for vehicle which is cost effective and simple in construction.

STATEMENT OF INVENTION
Fifth mounting support on gear box comprises; at least two lower bracket members which are rigidly mounted on the gear box, lower channel member provided for connecting said two lower bracket members with each other, at least two upper bracket members which are rigidly mounted on the chassis frame , upper channel member provided for connecting said two upper bracket members with each other, wherein said lower channel member and upper channel member are connected with each other through the bolt passing through the spring means provided below the said lower channel member such that while tightening the said bolt , said spring means will get compressed and consequently said spring means will apply a force on the said lower channel member in opposite vertically upward direction of overhung load in order to nullify excess bending moment.
Fifth mounting support on gear box, in accordance with this invention, wherein said lower bracket members are mounted on the body of gear box at left hand side and right hand side and said upper bracket members mounted on the long member of chassis frame.
Fifth mounting support on gear box, in accordance with this invention, wherein said lower channel member is connected to the said lower bracket members.
Fifth mounting support on gear box, in accordance with this invention, wherein said upper channel member is connected to the said upper bracket members.
Fifth mounting support on gear box, in accordance with this invention, wherein said upper channel member and upper bracket member assembly comprises rubber buffer

and washer configured to be provided between said upper channel member and upper bracket members.
Fifth mounting support on gear box, in accordance with this invention, wherein said lower bracket members and upper bracket members are made up of sheet metal.
Fifth mounting support on gear box, in accordance with this invention, wherein said spring means is helical spring.
Fifth mounting support on gear box, in accordance with this invention, wherein said spring means is compression spring.
SUMMARY OF INVENTION
In accordance with the present invention, fifth mounting support on gear box for vehicle comprises; first lower (LH) bracket member (10) and second lower RH bracket member (20) which are rigidly mounted on the gear box. First channel member (30) is configured to be fitted between said first lower (LH) bracket member (10) and said second lower (RH) bracket member (20) for connecting the said two first and second lower (LH & RH) bracket members with each other.
First upper LH bracket member (50) and second upper RH bracket member (60) are mounted on the chassis frame, Second channel member (40) is configured to be fitted between said first upper LH bracket members (50) and said second lower RH bracket member (60) for connecting the said first and second bracket members (50,60) with each other.

The said first channel member (30) and second channel member (40) are connected with helical compression spring member (70) and bolt (80) to provide some pre-load on the said Gear box in opposite direction of overhung load in order to nullify excess bending moment.
BRIEF DESCRIPTION OF DRAWINGS
Figure-1 shows lower LH and RH bracket members.
Figure-2 shows lower channel member used to connect the said lower bracket
members. Figure-3 shows upper channel member. Figure-4 shows upper LH and RH bracket members connected by said upper channel
member. Figure-5 shows helical compression spring and cross section at C-C. Figure-6 shows schematic view of fifth mounting on gear box for vehicles. Figure-7 shows cross section (Y-Y) details at portion 'A' of fifth mounting on gear
box for vehicles. Figure-08 shows details of potion 'B' of fifth mounting on gear box for vehicles.
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 referring to figure -01 to 08, in accordance of the present invention, fifth mounting support on gear box for vehicles comprises; a first lower (LH) bracket member (10) and a second lower (RH) bracket members (20) which are rigidly

mounted on a gear box. A first channel member (30) is provided for connecting said first lower (LH) bracket member (10) and second lower (RH) bracket members (20) with each other. A first upper (LH) bracket member (50) and a second upper (RH) bracket members (60) are rigidly mounted on the long member of chassis frame. A second channel member (40) is provided for connecting said first upper (LH) bracket member (50) and said second upper (RH) bracket member (60) with each other.
Rubber buffers and washers are adapted to be placed in between said second channel member (40) and said first and second upper bracket members (50, 60) assembly to minimize the shock and vibration in dynamic or running conditions.
The said first channel member (30) and second channel member (40) are connected through a helical compression spring (70) and bolt (80) which passes through the said helical compression spring (70) such that while tightening of the said bolt (80), the said helical compression spring (70) will get compressed and consequently said helical compression spring (70) will apply a force on the said first channel member (30) in an opposite and vertically upward direction of overhung load in order to nullify the excess bending moment.
The amount of force applied through the said helical compression spring (70) will depend upon the amount of compression of the said helical spring (70). The force applied through the said helical compression spring (70) will create a bending moment opposite to that of over hung load. As a result the excess bending moment will get nullified at rear face of engine block (RFOB).
The first and second lower bracket members (10, 20) are mounted on the body of the gear box at left hand side and right hand side and said first and second upper bracket members (50, 60) are mounted on the long member of chassis frame.

The first channel member (30) is connected to the said first and second lower bracket members and the second channel member (40) is connected to the said first and second upper bracket members (50, 60). The second channel member (40) and first and second upper bracket member (50, 60) assembly comprises a rubber buffer (90) and washer configured to be provided between them.
The first and second lower bracket members and first and second upper bracket members are made up of sheet metal.
The said first and second lower (LH, RH) bracket members (10, 20) and said first and second upper (LH, RH) bracket members (50, 60) are preferably made up of sheet metal. The said first lower LH Bracket members (10) and said second lower RH bracket member (20) are mounted on left hand side and right hand side of body of the gear box.
The said first upper LH bracket members (50) and said second upper RH bracket member (60) are mounted on chassis frame.
The second channel member (40) is connected to the said first upper LH bracket member (50) and said second upper RH bracket member (60). The said first channel member (30) and second channel member (40) connected with each other with bolt (80) passing through the said helical compression spring (70) provided below the said lower channel member (30).This arrangement reduces the bending moment on the rear engine block.
With this arrangement, the weight of the gear box is transferred to the said first upper LH bracket members (50) and said second upper RH bracket member (60) through the said second channel member (40) and said helical compression spring (70).

The present arrangement is cost effective because all components and parts can be easily manufactured and assembled.
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. A mounting structure on a gearbox assembly comprising:
first lower bracket member and a second lower bracket member;
said first and second lower bracket members being connected by a first channel member;
a first upper bracket member and a second upper bracket member;
said first and second upper bracket members being connected by a second channel member;
said first and second channel members being fastened together by a resilient member, such that upon fastening, said resilient member applies a pre-load on said gearbox in a direction opposite to an engine block overhung load to nullify excess bending moment.
2. The mounting structure as claimed in claim 1, wherein a bolt is provided to pass through the said resilient member to fasten said first and second channel members together with said resilient member.
3. The mounting structure as claimed in claim 1 and 2, wherein said resilient member is a helical compression spring.
4. The mounting structure as claimed in claim 1, wherein said first and second lower bracket members are mounted on body of said gear box at left side and right side and said first and second upper bracket members are mounted on a long member of a chassis frame.

5. The mounting structure as claimed in claim 1, wherein a rubber buffer and washer is provided between said second channel member and first and second upper bracket members.
6. The mounting structure as claimed in claim 1, wherein said first and second lower bracket members and first and second upper bracket members are made of sheet metal.
7. A mounting structure on a gearbox assembly as hereinabove described with reference to the accompanying drawings.