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 TWO STRUCTURE ENGINE HOOD FOR EXCAVATOR

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 202241053576 filed on 19th September, 2022.

FIELD OF INVENTION
[002] The present subject matter described herein, in general, relates to engineering machinery field and more specifically relates to engine hood for engineering machinery.

BACKGROUND OF THE INVENTION
[003] As per the reports of National Occupational Health and Safety Commission injuries occur when loads on anatomical structures are either instantly or over the time greater than the structures can withstand. Anatomical complexity, individual variability in tissue tolerances, and the interactions between biomechanical, environmental, and psychosocial risk factors make the determination of valid threshold limit values for exposure to biomechanical risk factors exceptionally difficult. A broad definition of manual handling is utilised (consistent with current Victorian and Queensland advisory documents), and the more general term “manual tasks” is preferred to emphasise the broader scope; encompassing, for example, tasks involving repetitive movements of the upper limbs in addition to the handling of loads. The definition of manual tasks provided in the Queensland Manual Tasks Advisory Standard will be adopted: Whilst many injuries occur as a result of slips, trips, and falls which occur whilst undertaking manual tasks, such injuries are not considered here.
[004] The UK manual handling regulations do not specify threshold limit values, noting: “The ergonomic approach shows clearly that such requirements are based on too simple a view of the problem and are likely to lead to incorrect conclusions”. However, Appendix 1 of the UK regulations provides “Manual handling risk assessment detailed assessment guidelines filter” to assist in screening out straightforward cases. The filter is: “a set of numerical guidelines developed from data in published scientific literature and on practical experience of assessing risks from manual handling. They are pragmatic, tried and tested; they are not based on any precise scientific formulae. The intention is to set out an approximate boundary within which the load is unlikely to create a risk of injury sufficient to warrant a detailed assessment”. The guidelines assume that the load is easy to grasp, and are for relatively infrequent lifts, up to 30 per hour. The appendix suggests that the loads should be reduced by 30% if the frequency is 60-120 per hour, by 50% if the frequency is 300-420 per hour, and by 80% if the frequency is 720 per hour. Similar figures are suggested for carrying if the load is carried less than 10 m. Reductions are also suggested where the lifting involves rotation (20% if the handler twists through 90°).
[005] The excavator is a front line machine in mining and construction field. These machines are operated both in mining and construction as a front line machine which excavate the earth for basic layout required for mankind. Since these machines are operated in all the three shifts, the daily routine check / maintenance of the machines to be carried out are mandatory. The operator / mechanics have to open the engine hood as single persons. The existing hood on BE220G is of single structure type (Refer fig 6). Before starting the machine the daily routine check will be done by lifting the engine hood which is shown in fig 6. The weight and locking system of the engine hood causes the service persons to be fatigued and stressed.
[006] The engine hood design is art of a great diverseness, is mostly single structure type of engine hood. Conventionally single structure type engine hood adopts overall opening in one way. The unlatching hood locks of its opening end is larger but because of the single structure type hood weight is hefty hence, effort is required in unlocking and lifting the engine hood. The hinge position opening ruler degree is also less therefore, it is unfavorable for the modular service of engine, hydraulic system etc., Conventionally, it also requires multiple service lock doors at the corresponding site of single structure type of engine hood. Open space for servicing to open and close the locks efforts are increasing, which have adopted electronic or hydraulic open and close system to integrated type engine hood, the manufacturing cost will increase to higher, has also increased rate of fault contemporary. The fixed on integrated type engine hood on vehicle frame, requires the positioning of maintenance that multiple service mounting and locks doors are set accordingly, but because of less numbers of service mounting and locks for door , maintenance and repair inconvenience of engine, cooling system, hydraulic system etc., is caused and said structure is conventionally more complicated and this type of single structure hood still provides maintenance inconvenience, complex structure and other problems.
[007] Thus, as an alternative solution has been developed to reduce the fatigue and stress of the service persons.

OBJECTS OF THE INVENTION
[008] Main object of the present invention is to provide an engine hood for an excavator.
[009] Another object of the present invention is to provide a two structured engine hood for an excavator to reduce fatigue and stress of the service persons.

SUMMARY OF THE INVENTION
[0010] 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 two structured engine hood for excavator, 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.
[0011] The present subject matter described herein, in general, relates to engineering machinery field and more specifically relates to engine hood for engineering machinery. The excavator engine hood is split into two structures, so that opening and closing of the engine hood is no longer arduous, the open effort of an engine hood, maintenance of repairers is more conducive, and servicing space is large.

STATEMENT OF INVENTION
[0012] The present invention discloses a two structure engine hood for excavators comprising a first structure configured to be mounted on the radiator side, a second structure configured to be mounted on the hydraulic pump side, at least one frame configured for mounting said first and second structure and wherein, the first structure is hinge mounted on the edge of the said frame on radiator side and the second structure is hinge mounted on the edge of the said frame on hydraulic pump side configured for opening said engine hood intermediately.
[0013] Accordingly, the present invention also discloses the two structure engine hood is configured to be mounted on the excavator body with a locking mechanism. The first structure is configured to be mounted on the machinery compartment frame that accommodates partitions, bottom and top covers. The two structure engine hood is configured to be opened and closed by flanking operation to form a rigid single hood structure. The two structure engine hood is configured with vents for air cooling. The two structure engine hood is configured with exhaust tail pipe cutout for mounting of exhaust pipe for exhaust smoke dispersion. The size of said frame and engine hood will vary for different types of vehicles. The two structure engine hood is configured for easy access to the engine parts for carrying out maintenance or repair work.

BRIEF DESCRIPTION OF THE DRAWINGS
[0014] 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:
[0015] 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.
[0016] Figure 1 illustrates a schematic view of the single structured engine hood in open position.
[0017] Figure 2 illustrates a schematic view of the excavator with the single structured engine hood.
[0018] Figure 3 illustrates a schematic view of a single structured engine hood in open and closed position.
[0019] Figure 4 illustrates an exploded isometric view of the excavator with the two structured engine hood.
[0020] Figure 5 illustrates a front view, top view and side view of the two structured engine hood.
[0021] Figure 6 illustrates an isometric view of the two structured engine hood in open and closed position.
[0022] Figure 7 illustrates a schematic view of the two structured engine hood in open position.
[0023] Figure 8 illustrates a schematic view of the two structured engine hood in open and closed position.
[0024] Figure 9 illustrates lifting and lowering guidelines provided in guidance material provided for the UK manual handling regulations.
[0025] 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
[0026] 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.
[0027] 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.
[0028] The present subject matter engineering machinery field, to be specific to engine hood for engineering machinery. The effectiveness of excavator engine hood practical application, the excavator engine hood comprises of two structures, one on radiator side and one on hydraulic pump side, where in the hood structure is installed on engine and located on the excavator with hood catcher lock method, the radiator side of the hood structure is connected with the machinery compartment frame which is used to install the partition, bottom and top covers and located on the excavator by fasteners method, the radiator side hood structure and hydraulic pump side hood structures are locked in flanking method to form a single hood structure to give rigidity to the hood when machine is in operation. When both the structures are positioned in locked condition, both the hood structured are provided with opening slots for air cooling and exhaust tail pipe cutout for exhaust smoke dispersion and to open and close the radiator side hood structure. The entire hood structure is assembled on the dedicated frame. The excavator engine hood is split into two structures, so that opening and closing of the engine hood is no longer arduous, the open effort of an engine hood, maintenance of repairers is more conducive, and servicing space is large.
[0029] BEML is manufacturing Earth Moving Machines for Indian / Abroad Mining and Construction sectors. As a part of the national interest for Inducting ENGINE HOOD for BE220G excavator in order to boost the operator / service personals safety, the engine hood assemblies are made up of Stainless Steel Sheet metal where the Single hood structure was converted into two half Stainless Steel Sheet metal to avoid opening and closing lifting weight difficulty in single hood structure. As a part of this development project, the operational feasibility and safety parameters were established indigenously and optimized.
[0030] To improve the opening and closing process of the hood lifting and to reduce the fatigue stress to the service personals with improved safety, the applicable BEML BE220G EXCAVATOR hood was studied to understand the effect of certain parameters of Hood lifting during daily routine check opening and closing, a design of Hood 3D model check was conducted.
[0031] Following factors were taken for experiment: -
Experimental Factors: Utility model related to Hood lifting, Opening,
Closing and Protection and safety.
Control Factors : The fabrication of the hood with sheet Material,
Thickness, welding method, lock assembly.
Noise Factors : Ambient conditions (Temp, Humidity etc.),
Operator fatigue, etc.
No. of Factors : 4
Levels : Design Levels and drawing
Release Sheet metal forming & Fabrication.
[0032] According to the, aforementioned invention, a person can readily gain access from the lower side into an engine compartment, allowing a maintenance job to be performed in a reasonable working posture. Thus, the working efficiency of the maintenance job can be improved with warm and fuzzy inside of service engineer.
[0033] The present invention discloses a two structure engine hood for excavators comprising a first structure configured to be mounted on the radiator side, a second structure configured to be mounted on the hydraulic pump side, at least one frame configured for mounting said first and second structure and wherein, the first structure is hinge mounted on the edge of the said frame on radiator side and the second structure is hinge mounted on the edge of the said frame on hydraulic pump side configured for opening said engine hood intermediately.
[0034] Accordingly, the present invention also discloses the two structure engine hood is configured to be mounted on the excavator body with a locking mechanism. The first structure is configured to be mounted on the machinery compartment frame that accommodates partitions, bottom and top covers. The two structure engine hood is configured to be opened and closed by flanking operation to form a rigid single hood structure. The two structure engine hood is configured with vents for air cooling. The two structure engine hood is configured with exhaust tail pipe cutout for mounting of exhaust pipe for exhaust smoke dispersion. The size of said frame and engine hood will vary for different types of vehicles. The two structure engine hood is configured for easy access to the engine parts for carrying out maintenance or repair work.
[0035] 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
[0036] Some embodiment of the present subject matter provide an engine hood for an excavator.
[0037] Some embodiment of the present subject matter provide a two structured engine hood for an excavator to reduce fatigue and stress of the service persons.
[0038] Figures 1-9 are now described using the reference numbers stated in the below table.
Reference Numeral Description
1 Two structure engine hood
2 Engine hood lifting direction on left side
3 Engine hood lifting direction on right side
4 Engine hood catcher design

,CLAIMS:
1. A two structure engine hood for excavators comprising:
a first structure configured to be mounted on the radiator side;
a second structure configured to be mounted on the hydraulic pump side;
at least one frame configured for mounting said first and second structure; and
wherein, the first structure is hinge mounted on the edge of the said frame on radiator side and the second structure is hinge mounted on the edge of the said frame on hydraulic pump side configured for opening said engine hood intermediately.

2. The two structure engine hood as claimed in claim 1 wherein, said two structure engine hood is configured to be mounted on the excavator body with a locking mechanism.

3. The two structure engine hood as claimed in claim 1 wherein, said first structure is configured to be mounted on the machinery compartment frame that accommodates partitions, bottom and top covers.

4. The two structure engine hood as claimed in claim 1 wherein, said two structure engine hood is configured to be opened and closed by flanking operation to form a rigid single hood structure.

5. The two structure engine hood as claimed in claim 1 wherein, said two structure engine hood is configured with vents for air cooling.

6. The two structure engine hood as claimed in claim 1 wherein, said two structure engine hood is configured with exhaust tail pipe cutout for mounting of exhaust pipe for exhaust smoke dispersion.

7. The two structure engine hood as claimed in claim 1 wherein, size of said frame and engine hood will vary for different types of vehicles.

8. The two structure engine hood as claimed in claim 1 wherein, said two structure engine hood is configured for easy access to the engine parts for carrying out maintenance or repair work.