DESC:FORM 2

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

COMPLETE SPECIFICATION
(See Section 10 and Rule 13)

Title of invention:
A DEVICE TO ENSURE ALIGNMENT OF MASTER GEAR TOOTH SPACE ON PRESSURE DISC

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 202241053011 filed on 16th September, 2022.
FIELD OF THE INVENTION
[002] The present subject matter described herein, in general, relates to assembly of pressure disc and other parts of clutch assembly and more particularly relates to a device to locate an orientation of gear tooth space on a pressure disc.
BACKGROUND OF THE INVENTION
[003] A motor vehicle clutch comprises a flywheel rotated by an engine crank shaft, a clutch plate having a splined hub axial movable on splines provided at one end of a main input gearbox shaft which is coaxial with the drive shaft, and a pressure disc attached to and rotatable with the flywheel. A strong spring is provided in the pressure disc which when the clutch is engaged, holds the clutch plate lining in frictional engagement with the lining on the pressure disc and/or friction surfaces on the flywheel so that the clutch plate transmits drive from the drive shaft to the gearbox. When the clutch is to be disengaged, the spring pressure is reduced to allow the clutch plate lining to separate from the surfaces with which they are in contact. The gearbox input shaft then can rotate independently of the drive shaft and the gearbox is disengaged from the engine.
[004] The pressure disc has to be maintained under a pressure and in engagement with the clutch plate lining. The clutch assembly consisting of pressure disc, clutch plate, spring, drum, case and flywheel has to be assembled in a proper sequence. Conventionally the markings on pressure disc during assembly were made manually which is a time consuming process and leads to error due to human intervention. The misalignment of pressure disc leads to improper assembly of clutch. Hence, there is a need to develop a device or a tool to inspect, ensure and to eliminate any errors in alignment due to human intervention.
OBJECT OF THE INVENTION
[005] The main object of the invention is to provide a device/tool to ensure an alignment of master gear tooth space on a pressure disc with center of lugs located at 120 degrees apart.
[006] Another object of the invention is to avoid error in alignment of pressure disc due to human intervention.
STATEMENT OF THE INVENTION
[007] Accordingly, the present invention relates to a device to locate master gear tooth space on a pressure disc, wherein the device comprises of plurality of arms are configured at equal angle apart from each other wherein one arm is configured with at least one pin for locating an orientation of a master gear tooth space with respect to a master lug and remaining arms configured to be removably mounted in plurality of lugs. The arm is configured to locate the master gear tooth space on the pressure disc with center of master lug. The arms are configured at 120 degrees apart from each other. The arm is configured to removably fit in the gear tooth space of the pressure disc. The device is configured to locate a reference point for making a clutch assembly. The reference point is configured to be the master gear tooth space and the master lug. Further, the master gear tooth space and center of the master lug are configured to be inline.
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 disclosure. 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 alignment device/tool for pressure disc of clutch assembly, and the aspects are further elaborated below in the detail description.
[009] The present invention discloses a device to ensure alignment of master gear tooth space on a pressure disc. said pressure disc alignment device/tool ensures position of master lug with master gear tooth space of pressure disc. The device comprises of three locating arms out of which one is a longer arm and other two are shorter arms. The longer arm of the device consists of pin to be aligned with master lug and master tooth space of the pressure disc wherein said pin fits in said gear tooth space. The device ensures the alignment at 1200 lugs with gear tooth space of the pressure disc. The device/tool avoids error in alignment due to human intervention.

BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The foregoing summary, as well as the following detailed description of embodiment, 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 device for ensuring master gear tooth space on pressure disc, in accordance with the present invention.
[0013] Figure 2A illustrates an isometric view of pressure disc of clutch assembly, in accordance with the present invention.
[0014] Figure 2B illustrates an isometric view of pressure disc with an alignment device of present invention, in accordance with the present invention.
[0015] Figure 3 illustrates an isometric view of a drum of clutch assembly, in accordance with the present invention.
[0016] Figure 4 illustrates an isometric view of a case of clutch assembly, in accordance with the present invention.
[0017] Figure 5 illustrates an isometric view of clutch assembly, in accordance with the present invention.
[0018] Figures depicts various embodiments of the present disclosure for purpose of illustration only. Only 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
[0019] 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.
[0020] Various modifications to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to another embodiment. 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.
[0021] The present invention discloses a device to locate master gear tooth space on pressure disc with respect to lugs. More specifically the present invention describes a pressure disc alignment-checking tool or device to ensure position of master lug with master gear tooth space of the pressure disc. The tool ensures the alignment at 120 degrees lugs with gear tooth space of the pressure disc. The alignment of master tooth space of pressure disc with master hole of case and the hole of drum for smooth actuation of clutch assembly in transmission. The master gear tooth space is the space where a master tooth of a drum is fitted for assembly or in other words master gear tooth space is the main marking point and with reference to said gear tooth space, all other components of clutch assembly are aligned for making an assembly.
[0022] Referring to figure 1, figure 1 shows the device or tool (100) having three arms at 120 degrees. The device or tool (100) comprises of two shorter arms (102) and one longer arm (104), wherein the longer arm (104) comprises a pin (106) to ensure the position of master gear tooth space (206) on the pressure disc (200). The pin (106) of the longer arm (104) is such that it fits in the gear tooth space of the pressure disc (200). In one of the embodiments, the diameter of the pin (106) on the longer arm is 8 mm. However, said diameters are subject to vary based on the dimensions of the pressure disc. Further, the aligning tool (100) on the pressure disc (200) ensures gear tooth alignment simultaneously with all the three lugs at 120 degrees intervals. The alignment-checking tool (100) avoids error during assembly and ensures smooth clutch actuation.
[0023] Referring to figure 2A and 2B, the pressure disc (200) of the clutch assembly (500) and the pressure disc (200) with the alignment device (100) of the present invention are shown. The pressure disc (200) comprises a plurality of lugs (202) mounted at 120 degrees apart from each other wherein said lugs (202) are provided for mounting of clutch actuating levers (502). In one of the embodiments, the pressure disc (200) has 80 number of gear teeth wherein the number of gear teeth are subject to vary. For making the clutch assembly (500), the pressure disc (200), a clutch plate, a spring, a drum (300) and a case (400) has to be assembled in a proper sequence and each component is marked with some reference for making proper assembly. The reference marking on pressure disc (200) is difficult as the center of one of the lug and one of the gear tooth space should be in line for defining it as reference. In the present embodiment, the reference lug or the master lug (204) is such that the center of the lug (204) matches with one of the gear tooth space and that space is known as the master gear tooth space (206). Such master lug (204) is ensured with the device (100) of the present invention. In more detail, when we place the device (100) on the pressure disc (200), the pin (106) of the longer arm (104) fits in one of the gear tooth space and wherein such gear tooth space is marked as master gear tooth space (206) and that lug is marked as master lug (204). To be more specific, when we place the device (100) on the pressure disc (200), all the three lugs (201) will not have the gear tooth space in line with the center of the lugs and only one lug is such that the gear tooth space will be in line with the center of said lug.
[0024] Referring to figure 3, the drum (300) of the clutch assembly is illustrated. The drum (300) comprises of inner teeth (302). Further, figure 3 shows a master tooth (304) and a master hole (306) of the drum (300) wherein the master tooth (302) fits in the master tooth space of the pressure disc (200) during assembly.
[0025] Referring to figure 4, the case (400) of the clutch assembly (500) is illustrated. The master hole (402) on said case (400) is shown which is used as the reference point for making the clutch assembly (500).
[0026] Referring to figure 5, the clutch assembly (500) is shown. The clutch assembly comprises of the pressure disc (200) (not shown), the drum (300) (not shown), the case (400) and the clutch actuating levers (502).
[0027] Further, the present invention discloses a device to locate master gear tooth space on a pressure disc, wherein the device (100) comprises of plurality of arms are configured at equal angle apart from each other wherein one arm (104) is configured with at least one pin(106) for locating an orientation of a master gear tooth space (206) with respect to a master lug (204) and remaining arms (102) configured to be removably mounted in plurality of lugs (202). The arm (104) is configured to locate the master gear tooth space (206) on the pressure disc (200) with center of master lug (204). The arms (102) are configured at 120 degrees apart from each other. The arm (104) is configured to removably fit in the gear tooth space of the pressure disc (200). The device (100) is configured to locate a reference point for making a clutch assembly. The reference point is configured to be the master gear tooth space (206) and the master lug (204). Further, the master gear tooth space (206) and center of the master lug (204) are configured to be inline.
[0028] Further, the invention can be used, but not limited to, in the following applications.
[0029] 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.
[0030] The alignment-checking tool can be extended with 4 lugs or 6 lugs as per the requirement of industrial applications.
[0031] Some 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.
[0032] REFERENCE NUMERALS
Element Description Reference Numerals
Alignment tool/device 100
Shorter arms 102
Longer arm 104
Pin 106
Pressure disc 200
Lugs 202
Master lug 204
Master gear tooth space 206
Drum 300
Inner teeth 302
Master tooth 304
Master hole of drum 306
Case 400
Master hole of case 402
Clutch assembly 500
Clutch actuating levers 502

,CLAIMS:
1. A device to locate master gear tooth space on a pressure disc, wherein the device (100) comprises:
plurality of arms configured at equal angle apart from each other wherein one arm (104) is configured with at least one pin (106) for locating an orientation of a master gear tooth space (206) with respect to a master lug (204) and remaining arms (102) configured to be removably mounted in plurality of lugs (202).
2. The device to locate master gear tooth space on the pressure disc, wherein the arm (104) is configured to locate the master gear tooth space (206) on the pressure disc (200) with center of master lug (204).
3. The device to locate master gear tooth space on the pressure disc, wherein the arm (104) and the arms (102) are configured at 120 degrees apart from each other.
4. The device to locate master gear tooth space on the pressure disc, wherein the arm (104) is configured to removably fit in the gear tooth space of the pressure disc (200).
5. The device to locate master gear tooth space on the pressure disc, wherein the device (100) is configured to locate a reference point for making a clutch assembly.
6. The device to locate master gear tooth space on the pressure disc, wherein said reference point is configured to be the master gear tooth space (206) and the master lug (204).
7. The device to locate master gear tooth space on the pressure disc, wherein said master gear tooth space (206) and center of the master lug (204) are configured to be inline.