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:
AN IMPROVED WORK CONTROL SYSTEM FOR A MOTOR GRADER

Applicant:
BEML Limited
A company Incorporated in India under the Companies Act, 1956
Having address:
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] This patent application claims priority from Indian Provisional Application 202041003102 filed on January 23, 2020.
TECHNICAL FIELD
[002] The present subject matter described herein, in general, relates to a improved work control system for a motor grader.
BACKGROUND
[003] Motor grader is a self-propelled, versatile machine widely used for haul roads construction and maintenance, mining application, Grading, Snow removal, Bank cutting, Front Dozing, Ripping, Scarifying operations, etc. The work attachments, like blade, front dozer, ripper and scarified are operated using mechanical linkages to control the hydraulic control valves. Maximum Operating effort permitted to pull the control lever is 4.5 Kg based on field study of the equipment. The present invention is to improve operating efforts to operate the control lever.
OBJECT OF THE INVENTION
[004] It is an object of the present invention to achieve smooth and effortless lever mechanism to pull the lever (From 4.5 Kg to 2 Kg).
[005] It is an object of the present invention to reduce operator fatigue to enable longer hours of continuous operation.
[006] It is an object of the present invention to achieve zone of reach and zone of comfort as per relevant standards.
[007] It is an object of the present invention to arrive at optimized geometry in bell crank lever mechanism to achieve effortless operation.
SUMMARY
[008] Before the present system and method are 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 an improved work control system for a 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 invention discloses a work control system. The work control system provides an arrangement of a steering wheel and a control lever to set optimum position for the operator by using a double bell crank operating lever mechanism. The double bell crank lever mechanism is introduced to make control lever operation smoother resulting in reduction of Operating effort from 4.5 Kg to 2.0 Kg.

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 an isometric view of a work control system for a motor grader, in accordance with one embodiment of the present subject matter.
[0013] Figure 2 illustrates another view of the work control system for the motor grader, in accordance with another embodiment of the present subject matter.
[0014] Figure 3 illustrates bell-crank lever geometry of the work control system for the motor grader, in accordance with one embodiment of the present subject matter.
[0015] Figure 4 illustrates top and sectional views of the work control lever arrangement on an independent shaft, in accordance with one embodiment of the present subject matter.
[0016] 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
[0017] 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.
[0018] 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.
[0019] Referring now to figure 1 to 4, in one aspect of present invention, a work control system (100) for a motor grader (equipment not shown) is disclosed. The work control system (100) comprises a console assembly (1), a cover fitted with fasteners to accommodate the control panel cover (2), an instrumentation panel (3) to accommodate LCD display, ammeter, speedometer, and rocker switches are not shown in the figure 1. A plurality of brackets (4) bolted to the cabin floor of the motor grader, a bell crank lever (5), a lever connecting rod (6) and yoke (7) are used to connect the double bell crank operating lever (8). An independent shaft (9) is used to arrange the spacer (10) and all the bell crank levers which consist of a knob (11) to actuate work control system through the bell crank lever (5). Bolts (12) are used at both end of independent shaft to hold the bell crank lever (5). A pin (13), H type yoke (14) connect the bell crank lever (5) and a control valve (20). Bolt (15) and nut (16) connects the lever connecting rod (6) and the bell crank lever (5). A foot operated pedal (17), a tilting unit (18) used to tilt and adjust the console box. With this arrangement, a steering wheel (19) and bell crank operating lever (8) can be set to the optimum position for the operator. Objects (21) and (22) are covers for the console assembly (1).
[0020] Force calculation has been made using mathematical formula of double bell crank lever and arrived at optimized geometry of double bell crank lever mechanism which has been introduced to reduce the effort from 4.5 Kg to 2.0 Kg. to operate the work attachments.
[0021] A work control system for motor grader comprising a console assembly (1) configured to accommodate a control panel cover (2) and an instrumentation panel (3) and a shifter assembly configured to set the steering wheel (19) and bell crank operating lever (8) at optimum operating position for the operator. The shifter assembly is configured with plurality of brackets (4) bolted to the cabin floor of the motor grader. The shifter assembly consists of a bell crank lever (5), lever connecting rod (6) and a yoke (7) to connect a double bell crank operating lever (8) for reducing the shifting effort. Bolts (12) are provided at both end of independent shaft for rotatable mounting the operating lever assembly to hold the bell crank lever (5). A H type yoke (14) is configured to connect the bell crank lever (5) and a control valve (20) through a pin (13). The lever connecting rod (6) and the bell crank lever (5) are connected through a bolt (15) and a nut (16). A foot operated pedal (17) and a tilting unit (18) is provided to tilt and adjust the console assembly (1). The console assembly (1) is configured with an object (21) and an object (22) as covers. The instrumentation panel (3) is configured to accommodate LCD display, ammeter, speedometer and rocker switches.
[0022] 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.
[0023] Some object of the present invention enables to substantially reduce lever operating force for work control system from existing operating force.
[0024] Some object of the present invention enables significantly reduced operator fatigue to enable longer hours of operation.
[0025] Some object of the present invention enables to improve overall equipment productivity.
[0026] Some object of the present invention enables to achieve smooth and effortless lever mechanism to pull the lever (From 4.5 Kg to 2 Kg).
[0027] Some object of the present invention enables to achieve zone of reach and zone of comfort as per relevant standards.
[0028] Some object of the present invention enables to arrive at optimized geometry in bell crank lever mechanism to achieve effortless operation.
[0029] REFERRAL NUMERALS
Element Description Reference Numeral
Console assembly 1
Control panel cover 2
Instrumentation panel 3
Brackets 4
Bell crank lever 5
Lever connecting rod 6
Yoke 7
Double bell crank operating lever 8
Independent shaft 9
Spacer 10
Knob 11
Bolt 12
Pin 13
H- type yoke 14
Bolt 15
Nut 16
Foot operated pedal 17
Tilting unit 18
Steering wheel 19
Control valve 20
Object 21
Object 22
Work control system 100

,CLAIMS:
1. A work control system for motor grader comprising:
a console assembly (1) configured to accommodate a control panel cover (2) and an instrumentation panel (3); and
a shifter assembly configured to set the steering wheel (19) and bell crank operating lever (8) at optimum operating position for the operator.
2. The work control system for motor grader as claimed in claim 1, wherein the said shifter assembly is configured with plurality of brackets (4) bolted to the cabin floor of the motor grader.
3. The work control system for motor grader as claimed in claim 1, wherein the said shifter assembly is configured with a bell crank lever (5), lever connecting rod (6) and a yoke (7) to connect a double bell crank operating lever (8) for reducing the shifting effort.
4. The work control system for motor grader as claimed in claim 1, wherein the said shifter assembly is configured with an independent shaft (9) to arrange the spacer (10) and the bell crank levers (5) are provided with a knob (11) for hand gripping and to actuate the work control system through the bell crank lever (5).
5. The work control system for motor grader as claimed in claim 1, wherein in the said shifter assembly, bolts (12) are provided at both end of independent shaft for rotatable mounting the operating lever assembly to hold the bell crank lever (5).
6. The work control system for motor grader as claimed in claim 1, wherein a H type yoke (14) is configured to connect the bell crank lever (5) and a control valve (20) through a pin (13).
7. The work control system for motor grader as claimed in claim 1, wherein the lever connecting rod (6) and the bell crank lever (5) are connected through a bolt (15) and a nut (16).
8. The work control system for motor grader as claimed in claim 1, wherein a foot operated pedal (17) and a tilting unit (18) is provided to tilt and adjust the console assembly (1).
9. The work control system for motor grader as claimed in claim 1, wherein said console assembly (1) is configured with an object (21) and an object (22) as covers.
10. The work control system for motor grader as claimed in claim 1, wherein the instrumentation panel (3) is configured to accommodate LCD display, ammeter, speedometer and rocker switches.