Claims:We claim:
1. A multi-plate wet clutch (1000) comprising:
a outer clutch basket (100) and inner clutch basket (130);
a plurality of clutch plate (140);
a plurality of friction plates (150) which are superposed alternately with said clutch plates (140);
a clutch flange (220) with a slot (200) and said clutch flange (220) supporting a compression spring (190);
and a judder spring (160) being accommodated in the said slot (200) of said clutch flange (220),
wherein said slot (200) has an annular projection (230) formed at its axial opening edge.
2. The multi-plate wet clutch (1000) as claimed in claim 1, wherein said slot (200) with said annular projection (230) is accommodated by bending the clutch plate (140) which is placed immediately next to said cutch flange (220).
3. The multi-plate wet clutch (1000) as claimed in claim 1, wherein said judder spring (160) is accommodated in said slot (200) partially formed over the overlap region of said clutch plate (140) and said friction plate (150).
4. The multi-plate wet clutch (1000) as claimed in claim 1, wherein the inner diameter of the bended clutch plate (D2) is more than the inner diameter of the annular projection (D3) but is less than that of the friction plate (D1) (D1>D2>D3).
5. The multi-plate wet clutch (1000) as claimed in claim 1, wherein said judder spring (160) is accommodated by retaining the original diameter of said clutch plate (140) and said friction plate (150).
6. A motor vehicle having said multi-plate wet clutch (1000) with said judder spring (160) arrangement.
, Description:FIELD OF INVENTION
The present invention relates to a multi-plate wet clutch for a motor vehicle. More particularly, the present invention relates to judder spring accommodation in the multi-plate wet clutch.
BACKGROUND OF INVENTION
Clutch is a device which transfers power from the engine to the wheels by its engaging and dis-engaging action. A multi-plate wet clutch is very common in any motor vehicles which comprises of a stack of alternating clutch plate and friction plate placed on the clutch hub.
Judder spring is also well prevalent feature in a multi-plate wet clutch which is placed so as to provide an opposing force to the compression spring. This facilitates the smooth engagement and disengagement of the clutch plates.
In conventional multi-plate wet clutch, the judder spring is positioned by the alteration of the diameter of the clutch or the friction plates, which results in the reduction of the overall efficiency of the clutch arrangement.
In the prior art JP5908652B2, the judder spring is placed by increasing the inner diameter of the friction plate. This increase in the inner diameter results in reduced efficiency of the clutch and also there is a tendency of falling of the judder spring.
It is also prevalent in the prior arts that the number of friction plates are increased to cope up with the functioning of the judder spring, but that ultimately results in difficulty in construction and reduced power transfer to the wheel.
Hence, in light of the cited prior art and limitations there is a requirement of judder spring accommodation in the multi-plate clutch in a way that the efficiency of the clutch is preserved.

Thus the first objective of the present invention is to provide a multi plate wet clutch with judder spring arrangement so as to facilitate smooth engagement and disengagement of the clutch plates.
Second objective of the present invention is to provide a multi plate wet clutch with judder spring which can be accommodated without the reduction of the inner diameter of the clutch plates or friction plates.
The third objective of the present invention is to provide such an arrangement for the judder spring so as to prevent the dislocation of the same.
The final objective of the invention is to provide a multi plate wet clutch which is easy to manufacture.
BRIEF DESCRIPTION OF THE INVENTION
In order to achieve the above objects, the present invention provides a multi-plate wet clutch with judder spring wherein the judder spring is accommodated in a slot that is provided in the clutch flange. The clutch flange which acts as a base for the compression spring in the multi-plate wet clutch to rest on, has been provided with a slot which provides passageway for the accommodation of the judder washer and the judder spring. The slot is partially formed over the overlap region of said clutch plate and said friction plate. Slot in the clutch flange is formed by the bending of the clutch plate which is immediate next to the clutch flange and it is provided with an annular projection which helps retain the judder spring in its position and thereby prevents the falling of the same. The inner diameter of the bending in the clutch plate is formed in a way that it is more than the inner diameter of the annular projection but is less than that of the friction plate.
This arrangement thereby results in no requirement of change of dimensions of the inner diameter of the clutch plates and the friction plates of the clutch. Thus the efficiency of the clutch assembly is kept intact and also at the same time the inclusion of the judder spring results in the smooth engagement and disengagement of the clutch plates. Also the slot in the clutch flange is provided with an annular projection which helps prevent the falling of the judder spring.
Although the subject matter has been described in considerable detail with reference to certain preferred embodiments thereof, other embodiments are possible. As such, the spirit and scope of the appended claims should not be limited to the description of the preferred embodiment contained therein.

BRIEF DESCRIPTION OF THE DRAWINGS
Other aspects of the invention will become apparent by consideration of the accompanying drawings and their description stated below, which are merely illustrative of a preferred embodiment of the invention and do not limit in any way the nature and scope of the invention.
Figure 1 illustrates the perspective view of the multi-plate wet clutch according to the present invention.
Figure 2 illustrates the exploded view of the multi-plate wet clutch according to the present invention.
Figure 3 illustrates the cross sectional view of the multi-plate wet clutch according to the present invention.
Figure 4 illustrates the magnified view of the judder spring accommodation portion according to the present invention.
Figure 5 illustrates the magnified view of the judder spring accommodation portion according along with the internal diameter of the bended clutch plate, annular projection and the friction plate according to the present invention.
DETAILED DESCRIPTION OF THE DRAWINGS
The invention will now be described with reference to the accompanying drawings which do not limit the scope and ambit of the invention. The description provided is purely by way of example and illustration.
The Figure 1 in the present invention shows the perspective view of the complete multi-plate wet clutch (1000). The multi-plate wet clutch (1000) comprises of the outer clutch basket (100) which acts as the resting structure of the alternative clutch plate (140) and friction plate (150) (as shown in Figure 2 and 3). The power from engine (120) via the engine gear (110) is directed to the multi-plate clutch (1000) and then to the gear box (not shown in the diagram) by the stack of clutch plate (140) and friction plate (150) which forms a part of the inner clutch basket (130).
Figure 2 illustrates an exploded view of a multi-plate wet clutch (2000). The multi-plate wet clutch (1000) system comprises an outer clutch basket (100) and an inner clutch basket (130) which is assembled within the interior of the outer clutch basket (100). The power from engine (not shown in the diagram) is received from the gear assembly (not shown in diagram) and is transferred to the outer clutch basket (100). This power gets transferred to the friction plate (150) and thereafter to the clutch plate (140). The judder spring (160) and judder washer (170) is paced on the clutch flange assembly (180) which acts as a supporting base for the compression spring (190) of the multi-plate wet clutch (1000).
The Figure 3 depicts the cross sectional view of the multi-plate clutch (3000) with the stack of alternate clutch plate (140) and friction plate (150). Clutch flange (220) is placed in a way that it supports the compression spring (190). A slot (200) (as shown in the Figure 4) is provided on the clutch flange (220) which accommodates the judder washer (170) and the judder spring (160). The said slot (200) is partially formed over the overlap region of said clutch plate (140) and said friction plate (150). X-X in the diagram denotes the central axis of the multi-plate clutch (3000).
The magnified view of the judder spring accommodation region (A-A) in the multi plate wet clutch (1000) is shown in the Figure 4. The slot (200) as provided in the clutch flange (220) has an annular projection (230) formed at its axial opening edge of the multi-plate wet clutch (1000). The slot is formed by the bending of the clutch plate (140) which is placed just next to the clutch flange (220). The said annular projection (230) helps retain the judder spring (160) in its position and thereby prevents the falling of the same. This kind of accommodation also helps retain the efficiency of the multi-plate wet clutch (1000) by retaining the inner diameter of the clutch plate (140) and the friction plate (150) and thereby also aids to the smooth engagement and disengagement of the clutch plate (140) and friction plate (150).
The inner diameter of the bended clutch plate (D2), the friction plate (D1) and the annular projection (D3) is shown in the Figure 5. The inner diameter of the bending in the clutch plate (D2) is formed in a way that it is more than the inner diameter of the annular projection (D3) but is less than that of the friction plate (D1) (the diameter is measured from the reference central axis X-X of the clutch).
The technical advancements offered by the present disclosure include:
• The present invention results in increased guide for the judder spring.
• The projected portion of the clutch flange in the present invention inhibits the dislocation of the judder spring in any vehicle condition.
• The novel arrangement of the judder spring gives improved pressure distribution for the entire clutch arrangement.
• There is not requirement of change of the inner diameter of the clutch plate or the friction plates of the clutch assembly for the judder spring accommodation, and hence the efficiency of the clutch assembly is retained.
While considerable emphasis has been placed herein on the specific features of the preferred embodiment, it will be appreciated that many additional features can be added and that many changes can be made in the preferred embodiment without departing from the principles of the disclosure. These and other changes in the preferred embodiment of the disclosure will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation.

LIST OF REFERENCE NUMERAL
100-Outer Clutch Basket
110-Engine Gear
120-From the Engine
130-Inner Clutch Basket
140-Clutch Plate
150-Friction Plate
160-Judder Spring
170-Judder Washer
180-Clutch Flange Assembly
190-Compression Spring
200-Slot
220-Clutch Flange
230-Annular projection
1000-Multi Plate Wet Clutch
2000-Exploded View of Multi Plate Wet Clutch
3000-Sectional View of Multi Plate Wet Clutch
A-A-Magnified view of Judder Spring Accommodation
D1-Inner Diameter of the Friction Plate
D2-Inner Diameter of the bended Clutch Plate
D3- Inner Diameter of the Annular Projection