DESC:FIELD OF THE INVENTION
The present invention relates to an optimized locking mechanism for enclosing fluid pressure in hydraulic cylinder using end cover. More particularly the present invention relates to the use of built-in design features to enclose fluid pressure in hydraulic cylinder using end cover and also to disassemble the end cover from the hydraulic cylinder through key hole. Advantageously the present invention relates to a locking mechanism with optimized boundary dimension in cylinder.

BACKGROUND OF THE INVENTION
The conventional method encloses end cover in hydraulic cylinder through thread tightening, where dis-assembly is done through untightening of end cover from tube. Another conventional method uses circlip and wire ring to enclose end cover in hydraulic cylinder and dis-assembly by removal of circlip and wire ring.

US9890803B2 relates to a hydraulic cylinder, particularly slave cylinder for a hydraulic clutch actuating system for motor vehicles. A hydraulic cylinder for a hydraulic clutch actuating system for motor vehicles has a piston subassembly with a piston and piston rod, a cylinder housing in which a pressure chamber is variably bounded at one side by the piston and fixedly bounded at the other side by a base of the cylinder housing. A spring element is arranged at the side of the piston opposite from the pressure chamber and is supported at one end on a spring plate on the housing side and operatively connected at the other end with the piston rod so as to bias the piston subassembly in a direction away from the base. A fixing section fixes the piston subassembly in a predetermined stroke setting with respect to the cylinder housing prior to first actuation of the hydraulic cylinder and is constructed to release the piston subassembly relative to the cylinder housing upon first actuation. This technical paper is about Hydraulic cylinder, particularly Slave cylinder for a hydraulic Clutch actuating system for Motor vehicles. End cover encloses fluid pressure developed inside the cylinder. A snap ring(Square in cross section) is used to prevent movement of end cover away from the cylinder. Mating feature is provided in both end cover and tube for snap ring location. Locking mechanism is with end plate and bolt. End plate is assembly with end cover to prevent the movement of end cover into the cylinder. There is no key mechanism.

CN103953605B relates to a hydrolic plate bender numerical control range-adjustable oil hydraulic cylinder. Hydrolic plate bender numerical control range-adjustable oil hydraulic cylinder belongs to hydrolic plate bender, particularly relates to NC hydraulic press brake oil hydraulic cylinder. Feature is that described spindle with trapezoidal screw thread is driven by servo deceleration machine input shaft and is placed in inside cylinder end caps, and whole spindle with trapezoidal screw thread is immersed in hydraulic oil, prevents spindle with trapezoidal screw thread from getting rusty. Advantage is that spindle with trapezoidal screw thread is placed in oil hydraulic cylinder rodless cavity, not only not easily get rusty, lubrication fully, spindle with trapezoidal screw thread is active in one's movements, and each portion is all immersed in the identical hydraulic oil of pressure, cannot be there is upper and lower play in spindle with trapezoidal screw thread, be beneficial to determination and the maintenance of positioning precision and repetitive positioning accuracy in each work cycle of numerical control range-adjustable oil hydraulic cylinder; Adopt the axial clearance adjusting gap thread bush adjustment spindle with trapezoidal screw thread, both preassembly, existing processing need not have been carried out when oil hydraulic cylinder assembles, component also can be accomplished to exchange, eliminate oil hydraulic cylinder input idle running angle different and impact on hydraulic cylinder travel controlling device positioning precision, under not needing to improve screw pair precise manner, also can obtain high positioning precision, and then can difficulty of processing be reduced, reduce cost of production. This invention is not related to optimized enclosure mechanism of end cover in hydraulic cylinder. This technical paper CN103953605B is about Hydrolic plate bender numerical control range adjustable oil hydraulic cylinder.

CN108757641A relates to a kind of hydraulic cylinder self locking mechanical mechanism and its self-locking method for cleaning container. The present invention relates to a kind of hydraulic cylinder wiper mechanism latching mechanical mechanisms and its self-locking method for cleaning container, including hydraulic cylinder and the piston inside hydraulic cylinder, it is characterized in that: Include that latch groove on piston, one end penetrate the self-lock pin that inside hydraulic cylinder and can be penetrated in latch groove, for driving self-lock pin drive component, the closed type filling body on drive component and filler in closed type filling body in axial sliding in latch groove; When closed type filling body works, the filler enter the gap between self-lock pin and hydraulic cylinder and or the gap between closed type filling body and drive component in complete sealing to hydraulic cylinder; Its self-locking method includes: S1 self-lockings, S2 sealings and S3 reset; Beneficial effects of the present invention: It is simple in structure, leakproofness is strong, security performance is high. This invention is not related to
optimized enclosure mechanism of end cover in hydraulic cylinder. This technical paper CN108757641A is about a kind of hydraulic cylinder self locking mechanical mechanism and its self locking method for cleaning container.

CN104088852B relates to an elastic card claw enclosed automatic locking mechanism for hydraulic cylinder. The invention belongs to hydraulic cylinder field, particularly disclose a kind of hydraulic cylinder elastic card claw enclosed automatic locking mechanism; Technical problem to be solved is for providing a kind of profile succinct, lock function is reliably rapid, does not need additional operations mechanism, separately operational motion, hydraulic cylinder, in realizing expanding-contracting action, is realized locking and the hydraulic cylinder of release action elastic card claw enclosed automatic locking mechanism; Comprise front end housing, cylinder barrel, back cylinder cover, piston rod, piston and lockable mechanism, described cylinder barrel is threaded with front end housing, back cylinder cover, the external diameter at cylinder barrel two ends and front end housing, back cylinder cover in wall matched in clearance, described piston rod entirety is stepped, piston rod is movably arranged in cylinder barrel through front end housing, described piston is connected with piston rod thread, and piston inner wall coordinates with piston rod small-end crest clearance; Described lockable mechanism comprises elastic card claw and guiding lock tube, and elastic card claw and guiding lock tube are mutually locked in that piston rod stretches out or play locking action when retracted state. This invention is not related to optimized enclosure mechanism of end cover in hydraulic cylinder. This technical paper
#CN104088852B is about lock of piston by Elastic card claw enclosed automatic locking mechanism for hydraulic cylinder.

CN104806585B relates to an end cap valve core case integral type rice transplanter hydraulic jack. The present invention discloses a kind of end cap valve core case integral type rice transplanter raise-lower hydraulic oil cylinder. Including gearbox body, rear end cap, piston, oil return pipe, cylinder barrel, piston rod, drive end bearing bracket, pin, push rod, safety travel valve, valve element, cartridge cover, oil-feed relief valve, piston, pin, push rod, safety travel valve are arranged on after piston rod constitutes piston component and are arranged on cylinder barrel, and drive end bearing bracket, rear end cap are arranged on cylinder barrel two ends. Spool bore, oil leak hole, secondary oil input channel, remittance oil hole, main oil input channel, safe oil return road, high pressure spill port, low pressure spill port are set on rear end cap of the present invention, valve element is arranged in spool bore makes oil circuit control be integrated in rear end cap, hydraulic pressure oil-feed oil circuit, oil return circuit are arranged in rear end cap, achieve hydraulic lifting oil cylinder integrated with oil passage control valve, high pressure in-line, low pressure oil return line, significantly reduce the space that hydraulic jack, control valve and oil circuit are occupied, decrease workpiece needed for system, be effectively improved the reliability of system work. This invention is not related to optimized enclosure mechanism of end cover in hydraulic cylinder. This technical paper #CN104806585B is about End cap valve core case integral type rice transplanter hydraulic jack. Hold of end cover is by using tie rods or stud as seen in drawing. Drawing is with lesser clarity and numbering is not clear.

KR101317150B1 relates to a rod cover for hydraulic cylinder. The hydraulic cylinder rod cover according to the present invention is a hydraulic cylinder having a hydraulic port coupled to the cylinder to prevent the rod of the hydraulic cylinder from being completely separated out of the cylinder and into or out of the oil from the outside into the cylinder. A rod cover for a body, comprising: a body; A through hole formed in a central portion of the body and through which a rod passes; And a flow path groove formed in the body and communicating with the outside and a flow path groove communicating with the hydraulic port and open toward one side of the cylinder to apply hydraulic pressure to one side of the cylinder, wherein the flow path groove includes the rod cover. It characterized in that it is formed in an annular shape around the through hole. This invention is not related to optimized enclosure mechanism of end cover in hydraulic cylinder. This technical paper #KR101317150B1 is about design of features of rod cover for the functional it has to perform. As seen in the drawing Rod cover is locked using bolts.

CN202708063U relates to an inner snap ring type hydraulic cylinder sealing structure, hydraulic cylinder and concrete pump truck. The utility model provides an inner snap ring type hydraulic cylinder sealing structure which comprises a cylinder, a guiding sleeve, an inner snap ring, a sleeve ring and a fastener, wherein a first sealing element is arranged between the guiding sleeve and the sleeve ring and a second sealing element is arranged between the cylinder and the sleeve ring. The utility model also provides a hydraulic cylinder with the sealing structure and a concrete pump truck containing the hydraulic cylinder. According to the technical scheme provided by the utility model, the structure is simple, the processing and mounting are convenient and the cost is low; an outside medium is effectively prevented from entering into the gaps among the inner snap ring, the sleeve ring, the cylinder and the guiding sleeve, so that a hydraulic medium in the hydraulic cylinder is prevented from being polluted; and the inner snap ring, the sleeve ring and the fastener are difficult to be rusted and the guiding sleeve is convenient to detach. This technical paper is about Inner snap ring type hydraulic cylinder sealing structure, hydraulic cylinder. End cover encloses fluid pressure developed inside the cylinder.
Spring plate is used at one end of the cylinder to hold the spring and other components. To prevent movement of spring plate inside the cylinder, 2 different features are used. There is no key mechanism, as there is no snap ring locking mechanism.

Limitations of conventional designs:
• Design occupies more space and is not suitable for boundaries with severe dimensional constraints
• Cost of manufacturing
• Higher assembly and dismantle cycle time
• Operator fatigue
• Constrained geometrical tolerances

Accordingly, there exists a need for an optimized locking mechanism for enclosing fluid pressure in hydraulic cylinder using end cover.

OBJECTS OF INVENTION
It is the primary object of the present invention to provide an optimized locking mechanism for enclosing fluid pressure in hydraulic cylinder using end cover.

It is another object of the present invention which uses built-in design features to enclose, enclosing fluid pressure in hydraulic cylinder using end cover and also to disassemble the end cover from the hydraulic cylinder through key hole.

It is another object of the present invention to enclose the fluid pressure developed in the hydraulic cylinder using end cover and this invention provides efficient method to perform the above design criteria.

It is another object of the present invention to provide a simplified locking mechanism which provides optimized dimensional boundary for the cylinder, wherein provides needed stroke in the limited boundary condition.

It is another object of the present invention, wherein the key-hole is used to dis-enclose the fluid pressure in hydraulic cylinder using end cover during dis-assembly for service of hydraulic cylinder.

It is another object of the present invention to provide a locking mechanism with optimized boundary dimension in cylinder.

It is another object of the present invention to bring out advantage of achieving the stroke in limited dimensional boundary conditions and optimized cylinder design where there is restricted dimensional boundary.
It is another object of the present invention to reduce the cost of manufacturing by eliminating thread, and/or circlip.

It is another object of the present invention to reduce the processing time and weight of the cylinder assembly.

It is another object of the present invention to bring out advantage during dis-assembly with the use of key-hole provided in end cover and feature provided in cylinder tube.

It is another object of the present invention to reduce the assembling and disassembling time with reference to service and time.

SUMMARY OF THE INVENTION
One or more of the problems of the conventional prior art may be overcome by various embodiments of the present invention.

It is the primary aspect of the present invention to provide an optimized locking mechanism for enclosing fluid pressure in hydraulic cylinder using end cover, comprising the following steps:
transferring of force on an end cover and the end cover tends to move in the direction of fluid applied when a piston touches the end cover during extension stroke of the hydraulic cylinder;
providing a snap ring with one or more mating features in a tube and a groove feature on the end cover to configure the end cover in a stable position; and
stopping movement of the end cover inside the hydraulic cylinder by mating features on both the tube and the end cover,
wherein the fluid pressure is enclosed in the hydraulic cylinder using the end cover, and
the end cover is disassembled from the hydraulic cylinder through a key hole.

It is another aspect of the present invention to provide an optimized locking mechanism for enclosing fluid pressure in hydraulic cylinder using end cover, wherein the mating features comprise of one or more stepped diametrical features and the like.

It is another aspect of the present invention to provide an optimized locking mechanism for enclosing fluid pressure in hydraulic cylinder using end cover, wherein the locking mechanism is configured to provide an optimized dimensional boundary for the hydraulic cylinder with required stroke in the optimized boundary condition.
It is another aspect of the present invention to provide an optimized locking mechanism for enclosing fluid pressure in hydraulic cylinder using end cover, wherein the mating feature is provided in both the end cover and the tube for snap ring locking mechanism.

It is another aspect of the present invention to provide an optimized locking mechanism for enclosing fluid pressure in hydraulic cylinder using end cover, comprising:
an end cover;
a snap ring; and
a tube comprises of a keyhole,
wherein the tube is a static component of the hydraulic cylinder configured to accommodate snap ring locking mechanism and one or more stepped diametrical features to stop the movement of end cover and to make the end cover in a stable position,
wherein the key hole is configured to remove the snap ring during dis-assembly of the end cover from the hydraulic cylinder, wherein the snap ring is a static component configured to act as a stopper to stop the movement of the end cover, and
the end cover is a static component configured to enclose a pressure chamber at an optimized boundary condition of the hydraulic cylinder and comprises of one or more grooves and step diameter and snap ring features to restrict the movement of end cover in the hydraulic cylinder.

BRIEF DESCRIPTION OF THE DRAWINGS:
So that the manner in which the features, advantages and objects of the invention, as well as others which will become apparent, may be understood in more detail, more particular description of the invention briefly summarized above may be had by reference to the embodiment thereof which is illustrated in the appended drawing, which form a part of this specification. It is to be noted, however, that the drawing illustrates only a preferred embodiment of the invention and is therefore not to be considered limiting of the invention's scope as it may admit to other equally effective embodiments.
Figure 1: illustrates cross sectional view of the hydraulic cylinder according to one embodiment of the present invention.
Figure 2: illustrates cross sectional view of the enclosure mechanism of end cover in hydraulic cylinder according to another embodiment of the present invention.

DESCRIPTION FOR DRAWINGS WITH REFERENCE NUMERALS:
[1] Tube
[2] Snap ring
[3] End cover
[a] Key hole
[b] Stepped diametrical features in tube and end cover
[c] Tube and end cover setup for snap ring locking mechanism

DETAILED DESCRIPTION OF THE INVENTION
It is to be understood that the present disclosure is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. The present disclosure is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.

The present invention relates to an optimized locking mechanism for enclosing fluid pressure in hydraulic cylinder using end cover. More particularly the present invention relates to the use of built-in design features to enclose fluid pressure in hydraulic cylinder using end cover and also to disassemble the end cover from the hydraulic cylinder through key hole. Advantageously the present invention relates to a locking mechanism with optimized boundary dimension in cylinder.

Referring to Figure 1, a cross sectional view of the hydraulic cylinder according to one embodiment of the present invention is illustrated and referring to figure 2, a cross sectional view of the enclosure mechanism of end cover in hydraulic cylinder according to another embodiment of the present invention is illustrated. The optimized locking mechanism for enclosing fluid pressure in hydraulic cylinder using end cover, comprising the following steps:
transferring of force on an end cover [3] and the end cover [3] tends to move in the direction of fluid applied when a piston touches the end cover [3] during extension stroke of the hydraulic cylinder;
providing a snap ring [2] with one or more mating features [b] in a tube [1] and a groove feature on the end cover [3] to configure the end cover [3] in a stable position; and
stopping movement of the end cover [3] inside the hydraulic cylinder by mating features [b] on both the tube [1] and the end cover [3],

The fluid pressure is enclosed in the hydraulic cylinder using the end cover [3]. The end cover [3] is disassembled from the hydraulic cylinder through a key hole [a]. The mating features [b] comprise of one or more stepped diametrical features and the like.
The locking mechanism is configured to provide an optimized dimensional boundary for the hydraulic cylinder with required stroke in the optimized boundary condition.
The mating feature [b] is provided in both the end cover [3] and the tube [1] for snap ring locking mechanism [2].

The optimized locking mechanism for enclosing fluid pressure in hydraulic cylinder using end cover, comprises of an end cover [3], a snap ring [2] and a tube [1] comprises of a keyhole [a]. The tube [1] is a static component of the hydraulic cylinder configured to accommodate snap ring locking mechanism [2] and one or more stepped diametrical features [b] to stop the movement of end cover [3] and to make the end cover [3] in a stable position. The key hole [a] is configured to remove the snap ring [2] during dis-assembly of the end cover [3] from the hydraulic cylinder, wherein the snap ring [2] is a static component configured to act as a stopper to stop the movement of the end cover [3]. The end cover [3] is a static component configured to enclose a pressure chamber at an optimized boundary condition of the hydraulic cylinder and comprises of one or more grooves and step diameter and snap ring features to restrict the movement of end cover [3] in the hydraulic cylinder.

Tube [1] is a static component of a hydraulic cylinder with features to accommodate snap ring locking mechanism [2] and stepped feature to stop the movement of end cover [3]. The tube [1] also comprises of a keyhole for ease of dis-assembly. The snap ring [2] is a static component which acts as a stopper to stop the movement of the end cover [3]. The end cover [3] is static component which encloses the pressure chamber at boundary condition of the cylinder and has grooves and features to restrict the movement of end cover [3] in the cylinder.

During extension stroke of hydraulic cylinder, stroke of the cylinder is achieved when the piston touches the end cover’s [3] inside face. The force is transferred on the end cover [3] and end cover [3] tends to move in the direction of fluid applied, when the piston touches the end cover [3] during extension stroke of hydraulic cylinder. The snap ring [2] with specifically designed mating features in tube [1] and feature on end cover [3] is provided to avoid movement of the end cover [3]. The movement of end cover [3] is stopped inside the cylinder by stepped diametrical features [b] on both tube [1] and end cover [3]. A key hole mechanism [a] facilitates ease of removal of snap ring during dis-assembly. The architecture [c] of tube and end cover for snap ring locking mechanism is shown in figure 2. End cover encloses fluid pressure developed inside the hydraulic cylinder. A snap ring (circular in cross section) [2] is used to prevent movement of end cover away from the hydraulic cylinder. This is referred to as “Snap ring locking mechanism”. Diametrical feature is provided in tube and end cover to prevent the movement of end cover into the cylinder. A Key hole mechanism is provided on the tube, and corresponding feature in end cover, for guidance to disassemble snap ring. This design brings out advantage of achieving stroke in limited boundary condition.

Although, the invention has been described and illustrated with respect to the exemplary embodiments thereof, it should be understood by those skilled in the art that the foregoing and various other changes, omissions and additions may be made therein and thereto, without parting from the spirit and scope of the present invention. ,CLAIMS:WE CLAIM:
1. An optimized locking mechanism for enclosing fluid pressure in hydraulic cylinder using end cover, comprising the following steps:
characterized in that,
transferring of force on an end cover [3] and the end cover [3] tends to move in the direction of fluid applied when a piston touches the end cover [3] during extension stroke of the hydraulic cylinder;
providing a snap ring [2] with one or more mating features [b] in a tube [1] and a groove feature on the end cover [3] to configure the end cover [3] in a stable position; and
stopping movement of the end cover [3] inside the hydraulic cylinder by mating features [b] on both the tube [1] and the end cover [3],
wherein the fluid pressure is enclosed in the hydraulic cylinder using the end cover [3], and
the end cover [3] is disassembled from the hydraulic cylinder through a key hole [a].

2. The optimized locking mechanism for enclosing fluid pressure in hydraulic cylinder using end cover as claimed in claim 1, wherein the mating features [b] comprise of one or more stepped diametrical features and the like.

3. The optimized locking mechanism for enclosing fluid pressure in hydraulic cylinder using end cover as claimed in claim 1, wherein the locking mechanism is configured to provide an optimized dimensional boundary for the hydraulic cylinder with required stroke in the optimized boundary condition.

4. The optimized locking mechanism for enclosing fluid pressure in hydraulic cylinder using end cover as claimed in claim 1, wherein the mating feature [b] is provided in both the end cover [3] and the tube [1] for snap ring locking mechanism [2].

5. The optimized locking mechanism for enclosing fluid pressure in hydraulic cylinder using end cover as claimed in claim 1, comprising:
an end cover [3];
a snap ring [2]; and
a tube [1] comprises of a keyhole [a],
wherein the tube [1] is a static component of the hydraulic cylinder configured to accommodate snap ring locking mechanism [2] and one or more stepped diametrical features [b] to stop the movement of end cover [3] and to make the end cover [3] in a stable position,
wherein the key hole [a] is configured to remove the snap ring [2] during dis-assembly of the end cover [3] from the hydraulic cylinder, wherein the snap ring [2] is a static component configured to act as a stopper to stop the movement of the end cover [3], and
the end cover [3] is a static component configured to enclose a pressure chamber at an optimized boundary condition of the hydraulic cylinder and comprises of one or more grooves and step diameter and snap ring features to restrict the movement of end cover [3] in the hydraulic cylinder.