DESC:FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
The Patent Rules, 2003
COMPLETE SPECIFICATION
(See sections 10 & rule 13)
1. TITLE OF THE INVENTION
A FACESHOVEL GLIDE PIN FOR REAR BUCKET DUMP CYLINDER
2. APPLICANT (S)
NAME NATIONALITY ADDRESS
BEML LIMITED IN BEML Soudha, No 23/1, 4th Main S.R. Nagar, Bengaluru- 560027, Karnataka, India.
3. PREAMBLE TO THE DESCRIPTION
COMPLETE SPECIFICATION

The following specification particularly describes the invention and the manner in which it is to be performed.

FIELD OF INVENTION:
[001] The present invention relates to the field of earth moving machines. The present invention in particular relates to a faceshovel glide pin for rear bucket dump cylinder.
DESCRIPTION OF THE RELATED ART:
[002] The effectiveness of faceshovel excavator, articulation of rear bucket dump cylinder practical application, the excavator comprises through rigid pin arrangement for articulation, one on Right hand side and one on Left hand side, where in the dump cylinder is installed with rigid pin arrangement for articulation of the cylinder during opening and closing of the dump bucket with the dump cylinders, which is located on the excavator as a ground engaging tool with ARM and Bucket links, and connected with the work attachment. When both the cylinder mounting pins are positioned in place with lock arrangement on the side of the rear bucket, the grease lubrication for the LH & RH pins are provided through manual greasing. Since it is rigid joint and grease lubrication hole provision is at the centre of the pin. (Refer fig- 4c) After prolong operation of the dump cylinder pin gets seize or worn out and for replacement, the removal of the pin is difficult for maintenance repairers and affect the availability of the excavator which influence on availability cost factor.
[003] Reference may be made to the following:
[004] Publication no. US4964779 relates to an electronic bucket positioning and control system for a vehicle of the type including a hydraulically controlled boom assembly and bucket. The bucket positioning and control system can operate in a bucket positioning mode, bucket return to position mode, bucket anti-rollback mode, and tilt cushion mode.
[005] Publication no. US2021230827 relates to a digging machine (1) such as a face shovel is controlled in an automated dumping sequence in which the bucket (10, 10') is pivoted to a first angular orientation before opening and, optionally, re-orienting to a second, slightly more forwardly inclined angular orientation. The first orientation may relieve the front part (20) of the bucket from the load while the second orientation is selected to discharge the load at an optimal trajectory. The bucket may move to a third angular orientation before closing the front part (20) against gravity.
[006] Publication no. US4215874 relates to an articulation lock is disclosed for locking the pivot connection between the front and rear frames of an articulated vehicle for operations such as maintenance and transporting. The articulation lock includes a sector-shaped locking plate mounted to the forward end of a pivot plate on the rear frame and having a plurality of arcuate recesses which establish locking positions. As the vehicle articulates, the locking plate passes between a pair of pivot plates on the front frame. A removable locking pin is stored next to the operator's seat, and the operator removes it from storage and pushes it into a lock hole in the top pivot plate of the pair of pivot plates on the front frame when it is desired to lock the articulation joint. When one of the locking plate recesses is vertically aligned with the lock hole, the pin is passed through the lock hole in the top pivot plate, then through the arcuate recess in the locking plate, and finally through a hole in the other pivot plate of the pair to lock the articulation pivot joint. The operator can lock the vehicle without leaving the operator's cab and while the vehicle is running. Further, the locking plate is shaped to aid the operator in locking and unlocking the joint, and it permits the storage position of the lock pin to be closely spaced to the lock hole.
[007] Publication no. US5595471 relates to utilizing a linkage arrangement (10) wherein the specific points of greatest loading have been grouped together son the various components of the linkage. In doing so, only these areas will require areas of significant increases in mass to accommodate the more severe loading. Also, the particular positioning between the various components is specifically designed to simplify their construction. These combined factors substantially reduce the overall weight of the linkage arrangement.
[008] Publication no. US6763619 relates to a work vehicle, a boom attached to the vehicle, a tool pivotally attached to the boom, an actuator for controllably moving the tool about its pivot, and an angular velocity sensor for sensing the angular velocity of the tool. A controller is adapted to perform a tool auto-hold function, automatically maintaining an initial tool orientation by processing the angular velocity data and commanding movement of the tool actuator to hold the angular velocity at zero. The controller is adapted to discontinue the tool auto-hold function when the operator manipulates a tool command input device affecting tool actuator movement, and resume the tool auto-hold function at the new orientation affected by the operator. Manipulation of an auto-hold command input device allows the operator to selectively enable and disable the tool auto-hold function.
[009] Publication no. EP0258819 relates to an electronic bucket positioning and control system for a vehicle of the type including a hydraulically controlled boom assembly and bucket. The bucket positioning and control system can operate in a bucket positioning mode, bucket return to position mode, bucket anti-rollback mode, and tilt cushion mode. Thus, effective greasing of Bottom pin of dump cylinder is not possible. Also greasing points are not easily accessible. The frequent blockage of grease passage results in faster bush wear and difficulty in removal of bottom pin & top pin & related bushes. Committed working at mine phase for three shift availability will not be met, which may incur financial loss to the company.
[010] The existing rear bucket dump cylinder PIN is of rigid assembly type. The rigid pin design allows the greasing only at the centre point of the pin, which cause the articulation of the dump cylinder movement and seizer is encountered.
[011] Hence, there needed a system to eliminate the difficulty in removal of the dump cylinder PIN during seizer.
[012] In order to overcome above listed prior art, the present invention aims to provide a faceshovel glide pin for rear bucket dump cylinder.
OBJECTS OF THE INVENTION:
[013] The principal object of the present invention is to provide a faceshovel glide pin for rear bucket dump cylinder.
[014] Another object of the present invention is to provide a faceshovel glide pin to facilitate removal of the pin and replacing the pin to increase the availability percentage and to reduce the downtime of the excavator.
SUMMARY OF THE INVENTION:
[015] The present invention relates to a faceshovel glide pin for rear bucket dump cylinder. Earth moving machines are used for mining and construction sectors. For inducting articulated glide pin for Faceshovel excavator on rear bucket dump cylinder and bucket pivot joint in order to boost the operator / service personals safety, the glide pin assemblies are Made up of Steel where the rigid pin assembly was converted into glide pin concept to facilitate removal of the pin and replacing the pin to increase the availability percentage and to reduce the downtime of the excavator.
BREIF DESCRIPTION OF THE INVENTION
[016] It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered for limiting of its scope, for the invention may admit to other equally effective embodiments.
[017] Figure 1 shows assembled faceshovel glide pin according to the present invention;
[018] Figure 2 shows exploded parts of faceshovel glide pin;
[019] Figure 3 shows glide pin assembled part;
[020] Figure 4a-4b shows removal and replacement of faceshovel.
DETAILED DESCRIPTION OF THE INVENTION:
[021] The present invention provides a faceshovel glide pin for rear bucket dump cylinder (fig 1&2). Earth moving machines are used for mining and construction sectors. For inducting articulated float pin on faceshovel excavator for bucket dump cylinder bottom end and rear bucket bottom dump cylinder pivot joint in order to facilitate removal of the pin and replacing the pin to increase the availability percentage and to reduce the downtime of the excavator, the glide pin assemblies are made up of Steel parts mentioned below-
1) Grease nipple LH
2) Wear resistance cover LH
3) Flange LH
4) Shaft
5) Flange RH
6) Wear resistance cover RH
7) Grease nipple RH
[022] The flange 3 & 5 are welded to the bucket for bolting the end covers 2 & 6, the pin 4 is inserted into the bucket pin mounting area along with the bottom dump cylinder and the two wear resistance covers 2 & 6 are installed on each side with screws to hold the pin 4 in position, to provide the lubrication for the pin during operation two grease nipples 1 & 7 are provided on each end (fig 2).
[023] The rigid pin assembly was converted into glide pin concept to facilitate removal of the pin and replacing the pin to increase the availability percentage and to reduce the downtime of the excavator (fig 3 & fig 4a-4b).
[024] During operation the pin 4 is free to rotate with bottom dump cylinder moment without any restriction in between the two end covers 2 & 6, also greasing is done through grease nipple 1 & 7 hence the ceasing of pin is avoided.
[025] The glide pin is introduced in faces hovel rear bucket dump cylinder and rear bucket opening and closing pivot point, solved the following-
• With the glide pin concept the greasing is at two ends of the pin due to this pin seizer is eliminated.
• With the glide pin concept facilitate removal of the pin and replacing the pin boots the moral of the repairers.
• Increased operational feasibility and safety parameters
• The machine availability percentage increased.
[026] 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 grease the dump cylinder pin joints as single persons. The existing greasing position is not accessible without operating machine. Before starting the machine the daily routine check will be done including the bucket pin, due to inaccessibility position of the grease nipple machine has to be operated and the grease nipple has to be positioned for greasing.
[027] The glide PIN concept improves the greasing lubricity to the PIN with less friction movement of the PIN during opening and closing of the bucket through dump cylinder.
[028] According a person can readily gain access from the lower of the faceshovel bucker greasing on the rear bucket, allowing a maintenance job to be performed in a reasonable working posture. Thus, the working efficiency of the bucket GLIDE PIN assembly and maintenance job can be improved with warm and fuzzy inside of service engineer.
[029] Numerous modifications and adaptations of the system of the present invention will be apparent to those skilled in the art, and thus it is intended by the appended claims to cover all such modifications and adaptations which fall within the true spirit and scope of this invention.
,CLAIMS:WE CLAIM:
1. A faceshovel glide pin for rear bucket dump cylinder comprises articulated float pin for faceshovel excavator on rear bucket dump cylinder and bucket pivot joint to boost the operator/ service personals safety, characterized in that the float pin assemblies are Made up of Steel where the rigid pin assembly was converted into float pin concept to facilitate removal of the pin and replacing the pin to increase the availability percentage and to reduce the downtime of the excavator.
2. The faceshovel glide pin for rear bucket dump cylinder, as claimed in claim 1, wherein the float pin is introduced in faceshovel rear bucket dump cylinder the pin is free to rotate with respect to the pin mounting area and the bottom dump cylinder bush this free rotation of the pin in turn eliminates the pin seizer.
3. The faceshovel glide pin for rear bucket dump cylinder, as claimed in claim 1, wherein the float pin concept additional greasing is at two ends of the pin due to this proper lubrication can be provided and avoid pin seizer.
4. The faceshovel glide pin for rear bucket dump cylinder, as claimed in claim 1, wherein the concept improves the greasing lubricity to the PIN with less friction movement of the PIN during opening and closing of the bucket through dump cylinder.
5. The faceshovel glide pin for rear bucket dump cylinder, as claimed in claim 1, where in the removal of pin during maintenance is simple and can be removed in any side by applying force.