FORM 2
THE PATENTS ACT, 1970 (as amended)
[39 OF 1970]
&
The Patents Rules, 2003
COMPLETE SPECIFICATION
[See Section 10 and Rule 13]
TITLE: "A BEARING BLOCK ASSEMBLY FOR AN ANTI-ROLL BAR OF
A VEHICLE"
Name and address of the Applicant:
TATA MOTORS LIMITED, an Indian company having its registered office at Bombay House, 24 Homi Mody Street, Hutatma Chowk, Mumbai 400 001, Maharashtra, INDIA.
Nationality: INDIAN
The following specification particularly describes the invention and the manner in which it is to be performed.

TECHNICAL FIELD
Embodiments of the present disclosure relates to a bearing block assembly. More particularly, embodiments relates to the bearing block assembly for mounting the anti-roll bar to the vehicle.
BACKGROUND OF DISCLOSURE
Motor vehicles use an anti-roll bar/stabilizer bar installed across the frame of the vehicle between the lower control arms of the vehicle's suspension system to control vehicle sway during turns. When a vehicle travels around a curve, the centrifugal force tends to keep the vehicle body moving in a straight line, causing the vehicle to lean outward, i.e., away from the direction of the turn, putting additional compressive force on the outer coil spring and causing the outer control arm to move upward, which carries one end of the stabilizer bar upward. The inner coil spring is placed in tension during the turn as there is less weight on the inner control arm, which lowers the control arm and carries the opposite end of the stabilizer bar downward. Thus, when turning a vehicle, the outer end of the stabilizer bar is carried upward and the inner end is carried downward, causing a rotational or twisting movement of the stabilizer bar. Therefore, the stabilizer bar must be mounted to the frame using bearings which allows the stabilizer bar to rotate.
One way of providing bearing block for anti-roll bar is by providing bearing block made of rubber. The problem associated with this system was squeaking noise, since they are sliding type of bearing blocks. As the hardness of natural rubber is ranging from about 60-70 shore, with a light interference in diameter it would not be good enough for the anti-roll bars. Also, for lubrication grease is used between Anti-roll bar and bush for reducing the friction. The major problem observed in this design is, the squeeze out or dry out of grease, this causes "squeaking noise" between anti-roll bar and bearing block which is predominantly irritant. This noise will be generated whenever vehicle is riding over a bump. During running of vehicle as the grease gets dried out or any dust ingress the noise and wear of bushes which is predominant problem. Many a times, it was also tried to retain the lubricant grease in bush by creating pockets in bush, but in loading condition this failed to keep the lubricant in place. Further, in recent past materials and other iterations came in to picture in the bearing blocks. The thermoplastic urethane and PTFE (Teflon) lining is used in the bearing block replacing the natural rubber, with a view that these

materials may provide abrasion resistance and squeaking noise will be reduced, but this also failed to give the required results.
Further, torsional rubber spring type bearing blocks (twist type bush) was developed to mount the anti-roll bar. But, this kind of designs were having problem of high Hysterisis and wheel rate increase. By keeping the high interference w.r.t rod and w.r.t clamping and less hardness of the material, block material twist with the application of torque on anti-roll bar. Thus there is less or no relative movement between bearing block and anti-roll bar. The method still had some drawbacks like durability. Further, the design also had shown high Hysterisis losses which make the return of anti-roll bar bit slower and increases the wheel rate. The increase in wheel rate may affect the handling characteristics of vehicle. Due to high interference, this design gives lot of assembly difficulties and calls for special pressing tools.
Further, support bushes having varied dimensions and hardness has to be provided in the conventional bearing block assemblies since diameter of anti-roll bar varies for different vehicles. These dimensions are calculated based on the amount of compression preload from inner side of rubber bush. Hence the assembly under goes into changes for every millimeter change in rod diameter. Also, the conventional assemblies had problems of providing standard setup in both sliding and twist type designs, wherein the bearing bush diameter needs to be changed for every millimeter change in anti-roll bar diameter.
In light of the foregoing discussion, it is necessary to develop an improved bearing block assembly for mounting the anti-roll bar to the vehicle to overcome the limitations stated above.
SUMMARY OF THE DISCLOSURE
The shortcomings of the prior art are overcome and additional advantages are provided through the provision of assembly as claimed in the present disclosure.
Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.

In one non-limiting embodiment of the present disclosure, there is provided a bearing block assembly for an anti-roll bar of a vehicle. The assembly comprises: a base plate of predetermined shape connectable to a frame of the vehicle chassis. The base plate is provided with at least one first bracket at predetermined location of the base plate. A clamping plate of predetermined shape is connectable to the base plate. The clamping plate is provided with a plurality of second brackets at predetermined location of the clamping plate. Further, at least one roller is provisioned in the at least one first bracket and in each of the plurality of second brackets. The anti-roll bar can be accommodated in a space formed between the rollers.
In one embodiment of the present disclosure, at least one spacer of predetermined thickness provided at each connecting junction of the base plate and the clamping plate.
In one embodiment of the present disclosure, the connecting junction of the base plate and the clamping plate, and the spacers will have through hole. The though hole provided in connecting junction of the base plate and the clamping plate, and the spacers are aligned at central axis. Further, the base plate clamping plate and the spacer are connected using fasteners.
In an embodiment of the present disclosure, the rollers are made of a material selected from at least one of polyurethane, rubber, nylon, low density plastic and thermo plastic polyurethane.
In an embodiment of the present disclosure, each of the rollers comprises metal pin at either ends.
In an embodiment of the present disclosure, the first bracket and the plurality of second brackets are "U" shaped brackets. The U-shaped bracket comprises mounting holes on each lug for accommodating the metal pins of the rollers.
The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.

OBJECTIVES OF THE DISCLOSURE
One object of the present disclosure is to provide a bearing block assembly for mounting the anti-roll bar to the vehicle, which provides replacement of sliding friction between anti-roll bar and bearing block with the rolling friction in order to eliminate squeaking noise and improve durability.
One object of the present disclosure is to provide a bearing block assembly for mounting the anti-roll bar to the vehicle, which provides replacement of torsional fatigue loading of torsional rubber bearing blocks with roller bearing block in order to eliminate the hysterisis loss and resulting effect on wheel rate and also durability.
One object of the present disclosure is to provide a bearing block assembly for mounting the anti-roll bar to the vehicle, which is simple in construction and easy to assemble.
One object of the present disclosure is to provide a bearing block assembly for mounting the anti-roll bar to the vehicle, which can accommodate anti-roll bar of different diameters.
BRIEF DESCRIPTION OF THE ACCOMPANYING FIGURES
The novel features and characteristic of the disclosure are set forth in the appended claims. The disclosure itself, however, as well as a preferred mode of use, further objectives and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying figures. One or more embodiments are now described, by way of example only, with reference to the accompanying figures wherein like reference numerals represent like elements and in which:
FIG. 1 illustrates a perspective view of a bearing block assembly for anti-roll bar having 3-rollars as an embodiment of the present disclosure.
FIG. 2 illustrates a perspective view of a bearing block assembly for anti-roll bar having 4-rollars as an embodiment of the present disclosure.
FIG. 3 illustrates an exploded view of a bearing block assembly of the present disclosure.

The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION
The foregoing has broadly outlined the features and technical advantages of the present disclosure in order that the detailed description of the disclosure that follows may be better understood. Additional features and advantages of the disclosure will be described hereinafter which form the subject of the claims of the disclosure. It should be appreciated by those skilled in the art that the conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. It should also be realized by those skilled in the art that such equivalent constructions do not depart from the spirit and scope of the disclosure as set forth in the appended claims. The novel features which are believed to be characteristic of the disclosure, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided for the purpose of illustration and description only and is not intended as a definition of the limits of the present disclosure.
To overcome the drawbacks mentioned in the background the present disclosure provides an improved bearing block assembly (100) for mounting the anti-roll bar (A) onto the vehicle. The proposed bearing block assembly (100) makes use of rollers (103) to facilitate the rolling contact between the anti-roll bar (A) and the bearing block assembly (100). This, eliminates the sliding contact and torsional contact between the anti-roll bar (A) and the bearing block assembly (100), thereby eliminates the squeaking noise and wears out in the bearing block assembly (100).
FIG. 1 is an exemplary embodiment of the present disclosure which illustrates perspective view of a bearing block assembly (100) for anti-roll bar (A) having 3-rollers (103). The assembly (100) consists of a base plate (101) of predetermined shape connectable to the vehicle chassis. The base plate (101) is made up of steel sheet, and is configured as base for the bearing block

assembly (100). The base plate (101) consists of one or more first brackets (101a) in predetermined locations for accommodating rollers (103). The base plate (101) also comprises a pair of mounting holes for joining a clamping plate (102) to the base plate (101), and for connecting the assembly (100) to the vehicle. The clamping plate (102) is made up of steel sheet, and is located at top end of the base plate (101). The clamping plate (102) comprises a plurality of second brackets (102a and 102b) in predetermined location for supporting the rollers (103). In an embodiment of the present disclosure, the first and second brackets (101a, 102a and 102b) are formed integrally with the base plate (101) and the clamping plate (102) by bending the portions of the base plate (101) and the clamping plate (102) to form lugs of the first and second brackets (101a, 102a, and 102b). In another embodiment of the present disclosure, the first and second brackets (101a, 102a and 102b) are "U" shaped brackets and are joined to the base plate (101) and the clamping plate (102). The "U" brackets will have a pair of lugs; the lugs are provided with mounting holes (H) to act as a pin joint for the rollers (103).
The rollers (103) are provisioned in each of the first and second brackets (101a, 102a, and 102b) to facilitate the rolling contact between the anti-roll bar (A) and the bearing block assembly (100). The rollers (103) will have metal pin (P) at either ends for connecting the rollers to the first and second brackets (101a, 102a and 102b). The rollers (103) rotate on their axis around the anti-roll bar when the anti-roll bar functions in the vehicle. In an embodiment of the present disclosure, the rollers (103) are made of polyurethane. The rollers (103) are molded by polyurethane material of hardness 80 ~ 90 shores with a metallic pin (P) running along its length. Polyurethane has better abrasion resistance compared to rubber, and also takes the radial load better than rubber. As shown in FIG. 1 there are 3 rollers (103) provided in the bearing block assembly (100), and to from a rolling contact with the anti-roll bar (A). The anti-roll bar (A) can be accommodated in a space formed between the 3 rollers (103), the rollers (103) surrounds the anti-roll bar (A) and makes rolling contact with the anti-roll bar (A). The rollers (103) rotate with the anti-roll bar (A) during working.
In an embodiment of the present disclosure, the rollers (103) are made of a material selected from at least one of polyurethane, rubber, nylon, low density plastic and thermo plastic polyurethane.

The bearing block assembly (100) for anti-roll bar (A) further includes a spacer (104) of predetermined thickness provided at each connecting zone of the base plate (101) with the clamping plate (102). The spacers (104) provided at both ends of the base plate (101) acts as adjustment mechanism for accommodating anti-roll bar (A) of varying diameters. Hence, for different diameters of anti-roll bars (A) i.e. the anti-roll bars (A) diameters ranging from about 16 to 25mm different bearing block needs to be designed. Thus, by changing the spacer (104) heights, the same assembly (100) can be used for various kinds of vehicles.
FIG. 2 is an exemplary embodiment of the present disclosure which illustrates a perspective view of a bearing block assembly for anti-roll bar having 4-rollars. The bearing block assembly (100) as shown in FIG. 2 comprises four rollers (103), wherein two rollers (103) are housed in second brackets (102a and 102b) at the clamping plate (102) and other two rollers (103) are mounted in first brackets (101a) at base plate (101) of the assembly (100). The rollers (103) are moulded with Polyuvethane material of hardness ranging from about 80 to 90 shores with a metallic pin running along its length. As the material Polyurethane is having better abrasion resistance when compared to rubber, it is used for rollers. Also, the polyurethane also takes radial load better than the rubber. The anti-roll bar (A) can be accommodated in a space formed between the 4 rollers (103), the rollers (103) surrounds the anti-roll bar (A) and makes rolling contact with the anti-roll bar (A). The rollers (103) rotate with the anti-roll bar (A) during working.
Further, the bearing block assembly (100) of the present disclosure is configured to accommodate the different sizes of the anti-roll bars (A). This is achieved by varying the thickness of the spacer (104) provided at connecting junction of the clamping plate (102) with the base plate (101). As an example, the below Table 1 illustrates various spacer heights, and different diameter of anti-roll bar (A) which can be accommodated in the assembly (100).

Anti-roll bar diameter in mm Thickness of the spacer in mm
16 1.5
18 5
20 8

22 11
25 15
Table 1
FIG. 3 is an exemplary embodiment of the present disclosure which illustrates an exploded view of a bearing block assembly (100). As shown in FIG. 3 the connecting junction of the base plate (101) and the clamping plate (102) will have through hole (105) for joining both through fasteners [not shown]. Further, the spacer (104) which is provided in between the base plate (101) and the clamping plate (102) in the connecting junctions will have a through hole (105). The though holes (105) provided in connecting junction of the base plate (101) and the clamping plate (102), and the spacers (104) are aligned at their respective central axis (C-C), and the base plate (101), clamping plate (102), and the spacer (104) are connected using fasteners.
Advantages:
The present disclosure provides a bearing block assembly for mounting the anti-roll bar to the vehicle, which provides replacement of sliding friction between anti-roll bar and bearing block with the rolling friction. This eliminates squeaking noise in the bearing block and improve durability.
The present disclosure provides a bearing block assembly for mounting the anti-roll bar to the vehicle, which provides replacement of torsional fatigue loading of torsional rubber bearing blocks with roller bearing block. This eliminates the hysteresis loss in the bearing block and resulting effect on wheel rate.
The present disclosure provides a bearing block assembly for mounting the anti-roll bar to the vehicle, which is simple in construction and easy to assemble. Further, the bearing block assembly is retrofitable onto the vehicles.
The present disclosure provides a bearing block assembly for mounting the anti-roll bar to the vehicle, which can accommodate anti-roll bar of different diameters. This results in economic solution for the Other Engineering Manufactures.
Equivalents

With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.
It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as "open" terms (e.g., the term "including" should be interpreted as "including but not limited to," the term "having" should be interpreted as "having at least," the term "includes" should be interpreted as "includes but is not limited to," etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases "at least one" and "one or more" to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles "a" or "an" limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases "one or more" or "at least one" and indefinite articles such as "a" or "an" (e.g., "a" and/or "an" should typically be interpreted to mean "at least one" or "one or more"); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of "two recitations," without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to "at least one of A, B, and C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B, and C" would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to "at least one of A, B, or C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B, or

C" would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase "A or B" will be understood to include the possibilities of "A,,or "B" or "A and B."
While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.
Referral Numerals;

Reference Number Description
100 Bearing block assembly
101 Base plate
101a First bracket
102 Clamping plate
102a and 102b Second brackets
103 Roller
104 Spacer
105 Through hole
A Anti-roll bar
P Metal pin
H Mounting holes on first and second bracket
C-C Central axis

We claim:
1. A bearing block assembly (100) for an anti-roll bar (A) of a vehicle, said assembly
comprises:
a base plate (101) of predetermined shape connectable to a frame of the vehicle
chassis, wherein the base plate (101) is provided with at least one first bracket (101a) at predetermined location of the base plate (101);
a clamping plate (102) of predetermined shape connectable to the base plate (101), wherein the clamping plate (102) is provided with a plurality of second brackets (102a and 102b) at predetermined location of the clamping plate (102); and
at least one roller (103) provisioned in the at least one first bracket (101a) and in each of the plurality of second brackets (102a and 102b);
wherein, the anti-roll bar (A) can be accommodated in a space formed between the rollers (103).
2. The assembly (100) as claimed in claim 1 comprises at least one spacer (104) of predetermined thickness provided at each connecting junction of the base plate (101) and the clamping plate (102).
3. The assembly (100) as claimed in claim 2, wherein the connecting junction of the base plate (101) and the clamping plate (102), and the spacers (104) will have through hole (105).
4. The assembly (100) as claimed in claim 3, wherein the though hole (105) provided in connecting junction of the base plate (101) and the clamping plate (102), and the spacers (104) are aligned at central axis (C-C).
5. The assembly (100) as claimed in claim 2, wherein the base plate (101), clamping plate (102), and the spacer (104) are connected using fasteners.
6. The assembly (100) as claimed in claim 1, wherein the rollers (103) are made of a material selected from at least one of polyurethane, rubber, nylon, low density plastic and thermo plastic polyurethane.

7. The assembly (100) as claimed in claim 1, wherein each of the rollers (103) comprises metal pin (P) at either ends.
8. The assembly (100) as claimed in claim 1, wherein the first bracket (101a) and the plurality of second brackets (102a and 102b) are "U" shaped brackets.
9. The assembly (100) as claimed in claim 7 and 8, wherein the U-shaped brackets (101a, 102a and 102b) comprises mounting holes (H) on each lug for accommodating the metal pins (P) of the rollers (103).
10. A vehicle comprising a bearing block assembly (100) for an anti-roll bar (A) as claimed in claim 1.