DESC:FORM 2

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

COMPLETE SPECIFICATION
(See Section 10 and Rule 13)

Title of invention:
A WINDSHIELD STRUCTURE FOR CABIN ASSEMBLY OF MOTOR GRADER

Applicant:
BEML Limited
A company Incorporated in India under the Companies Act, 1956
Having Address As:
BEML Soudha, 23/1, 4th Main,
Sampangirama Nagar, Bengaluru - 560 027,
Karnataka, India

The following specification particularly describes the invention and the manner in which it is to be performed.
CROSS-REFERENCE TO RELATED APPLICATIONS AND PRIORITY
[001] The present invention claims priority from Indian patent application numbered IN 202241058441 filed on 12th October, 2022.

FIELD OF INVENTION
[002] The present subject matter described herein, in general, relates to windshield structure of cabin assembly of motor grader and more specifically relates to unique front frame cross section of operator's station for improved visibility and overall aesthetics.

BACKGROUND OF THE INVENTION
[003] At present the operator's station is an enclosed space for the driver / operator designed to ensure operator safety with minimized sound levels and maximum operator comfort with improved visibility during the operation of the Grader equipment. Presently available cabins were designed with regular profile for the front frame giving it a flat design. In the existing design a separate rectangular plate should be welded to the frame to assemble the windshield glass and the rubber beading. Since the plate length is more and thickness is less while welding there are chances of welding distortion or deformation. This tends to result in creating uneven surfaces and the glass assembly becomes tedious.
[004] Thus, as an alternative solution, plate is formed and embedded as an integral part of the cross section which makes the manufacturing & assembly easier.

OBJECTS OF THE INVENTION
[005] Main object of the present invention is to provide unique profile on the front windshield structure of the cabin assembly to provide improved aesthetics design & for easy manufacturability.
[006] Another object of the present invention is to provide unique front frame cross section of the operator's station for improved visibility and overall aesthetics.
[007] Yet another object of the present invention is to provide improved aesthetics design & for easy manufacturability of front windshield of motor grader.

SUMMARY OF THE INVENTION
[008] Before the present system is described, it is to be understood that this application is not limited to the particular machine or an apparatus, and methodologies described, as there can be multiple possible embodiments that are not expressly illustrated in the present disclosures. It is also to be understood that the terminology used in the description is for the purpose of describing the particular versions or embodiments only, and is not intended to limit the scope of the present application. This summary is provided to introduce aspects related to the windshield structure for cabin assembly of motor grader, and the aspects are further elaborated below in the detailed description. This summary is not intended to identify essential features of the proposed subject matter nor is it intended for use in determining or limiting the scope of the proposed subject matter.
[009] The present subject matter described herein, in general, relates to unique front frame cross section of operator's station for improved visibility and overall aesthetics. The new profile provides a prismoidal shaped design in the front frame of the motor grader cabin which improves the driver / operator ability to look at the work attachment better. A separate plate is not required to be welded to the frame to assemble the windshield glass and the rubber beading whereas, the plate is embedded as an integral part of the cross section which makes the manufacturing & assembly easier.

BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The foregoing summary, as well as the following detailed description of embodiments, is better understood when read in conjunction with the appended drawing. For the purpose of illustrating the disclosure, there is shown in the present document example constructions of the disclosure, however, the disclosure is not limited to the specific methods and apparatus disclosed in the document and the drawing:
[0011] The detailed description is described with reference to the accompanying figure. In the figure, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawing to refer like features and components.
[0012] Figure 1 illustrates a front view and side view of the existing design for front pillar with square/rectangular cross section.
[0013] Figure 2 illustrates a front view and side of the new design for front pillar with unique cross section.
[0014] Figure 3 illustrates a front view of the new design for front pillar with unique cross section.
[0015] Figure 4 illustrates a side of the new design for front pillar with unique cross section.
[0016] Figure 5 illustrates a cross section of the ‘A’ pillar.
[0017] The figure depicts various embodiments of the present disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following discussion 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 OF THE INVENTION
[0018] Some embodiments of this disclosure, illustrating all its features, will now be discussed in detail. The words "comprising", “having”, and "including," and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items. Although any systems and methods similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present disclosure, the exemplary, systems and methods are now described. The disclosed embodiments are merely exemplary of the disclosure, which may be embodied in various forms.
[0019] Various modifications to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments. However, one of ordinary skill in the art will readily recognize that the present disclosure is not intended to be limited to the embodiments illustrated, but is to be accorded the widest scope consistent with the principles and features described herein.
[0020] Motor Grader is one of the wheeled equipment used for various construction and mining operations. With a powerful engine and transmission, it is used for shaping the soil bed, building embankments, grading slopes, trough shaped channels, trenches for roads, clearing snow on highways, etc. It is also used for moving earth and road building materials. The high powered BEML Motor Grader is mostly used for heavy duty road construction / maintenance jobs at mining yards and haul roads maintenance at Mines which will ease the movement of mining equipment like Dump trucks, Cranes, etc.
[0021] Referring to figure 2, the present subject matter is a unique profile used for front windshield structure (2) of the cabin assembly to provide improved aesthetics design & for easy manufacturability. The invention is for the unique front frame cross section of the operator's station for improved visibility and overall aesthetics. The profile with the front frame cross section is nomenclature as "A Pillar ". This profile is designed with a groove to accommodate the windshield glass (3) and rubber beading (4) on the other side. The new "A Pillar" with a cross section / specific profile is unique and improves the visibility of the work attachment without compromising on the structural strength of the cabin structure. This unique profile of the cabin frame gives maximized visibility & better aesthetic appeal. A plate with groove is embedded as an integral part of the cross section which makes the manufacturing & assembly easier.
[0022] The new profile provides a prismoidal shaped design in the front frame of the motor grader cabin which improves the driver / operator ability to look at the work attachment better. Fig 5 illustrates the cross section view of the ‘A’ pillar. The ‘A’ pillar comprises of a groove of a predefined profile for mounting the rubber beading and windshield glass. The ‘A’ pillar comprises of an outer plate (12), a back plate (13) and a stiffener plate (14). The outer plate (12) comprises a central hump to constitute the outer surface of the ‘A’ pillar. The outer plate (12) is configured with a concavity between the hump and a flanged end with a radial bend to form an acute angle for mounting and clenching the rubber beading (4) along with windshield glass (3). The flanged ends of the outer plate (12) are configured to be fastened to the ends of the back plate (13) to form a ‘A’ pillar. The stiffener plate (14) is configured to be mounted on the inner side of the outer plate (14) at the proximity of the hump ends to connect both ends of the hump to strengthen to the ‘A’ pillar. The ‘A’ pillar is configured with a groove of a predefined profile for mounting and clenching the rubber beading (4) and the windshields (3). The operator cabin comprises of various windshields (3) of predefined shape mounted on “A pillar” at predefined angles to each other. The windshield (8) at the top in the front is mounted at a predefined angle to provide better visibility to the operator and a slope is provided to the windshield to drain the water down from the windshield. The windshield (9) at the bottom in the front is mounted at a predefined angle to provide better visibility of the work place to the operator and a slope is provided to the windshield to avoid the settling of dust on the windshield. The windshields (10, 11) on the sides are mounted at a predefined angle to provide better visibility of the work place on the sides of the cabin. With the new profile the cabin assembly has got improved air tightness & sound insulation with better aesthetic appeal. In the present invention windshield and rubber beading mounting locations come along with the main profile. It reduces the cost of welding an additional plate and makes the assembly process simpler compared to the regular one.
[0023] Exemplary embodiments discussed above may provide certain advantages. Though not required to practice aspects of the disclosure, these advantages may include those provided by the following features.
[0024] Figures 1-5 are now described using the reference numbers stated in the below table.
Reference Numeral Description
1 Existing design for front pillar with square/rectangular cross section
2 “A” pillar with unique cross section
3 Windshield glass
4 Rubber beading
5 Spot weld
6 Location of rubber beading
7 Location of windshield
8 Windshield at the top in the front
9 Windshield at the bootom in the front
10 Windshield at the side
11 Windshield at the side
12 Outer plate
13 Back plate
14 Stiffener plate

,CLAIMS:
1. A windshield assembly for a cabin of motor grader comprising:
a frame structure (2) configured from ‘A’ pillar of a predefined profile;
a rubber beading (4) configured to be mounted on the structure (2); and
plurality of windshields (3) of various profiles configured to be mounted along with said rubber beading on ‘A’ pillar frame structure to provide enhanced visibility for the operator.

2. The windshield assembly for a cabin of motor grader as claimed in claim 1, wherein said ‘A’ pillar is configured with an outer plate (12), back plate (13) and a stiffener plate (14).

3. The windshield assembly for a cabin of motor grader as claimed in claim 1, wherein said outer plate (12) is configured with a central hump to constitute the outer surface of the ‘A’ pillar.

4. The windshield assembly for a cabin of motor grader as claimed in claim 1, wherein outer plate (12) is configured with a concavity between the hump and a flanged end with a radial bend to form an acute angle for mounting and clenching the rubber beading (4) along with windshield glass (3).

5. The windshield assembly for a cabin of motor grader as claimed in claim 1, wherein said flanged ends of the outer plate (12) are configured to be fastened to the ends of the back plate (13) to form a ‘A’ pillar.

6. The windshield assembly for a cabin of motor grader as claimed in claim 1, wherein said stiffener plate (14) is configured to be mounted on the inner side of the outer plate (14) at the proximity of the hump ends to connect both ends of the hump to strengthen to the ‘A’ pillar.
7. The windshield assembly for a cabin of motor grader as claimed in claim 1, wherein said ‘A’ pillar is configured with a groove of a predefined profile for mounting and clenching the rubber beading (4) and the windshields (3).

8. The windshield structure and windshield for cabin assembly of motor grader as claimed in claim 1, wherein said structural profiles of various windshields is configured to form a prismoidal shaped design to provide the driver / operator with better visibility to look at the work place.

9. The windshield structure and windshield for cabin assembly of motor grader as claimed in claim 1, wherein plurality of windshields (3) configured to be mounted on the top of the front side of the structure (8), bottom of the front side of the structure (9) and both sides of the structure (10, 11).

10. The windshield structure and windshield for cabin assembly of motor grader as claimed in claim 1, wherein the ‘A’ pillar is configured to form prismoidal structure of the front windshield.

11. The windshield structure and windshield for cabin assembly of motor grader as claimed in claim 1, wherein said cabin is configured to be air tight and sound insulated with enhanced visibility and aesthetic appeal.