Apparatus and method for turning a track bushing
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IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B25B-013/48
B23P-007/00
출원번호
US-0640056
(1984-08-13)
발명자
/ 주소
Garman, James A.
출원인 / 주소
Caterpillar Tractor Co.
대리인 / 주소
Pence, O. Gordon
인용정보
피인용 횟수 :
0인용 특허 :
6
초록▼
Apparatus and method of turning a bushing of a track chain link assembly is disclosed which enables the bushing to be turned in place in the link assembly, thereby eliminating the need to disassembly the link assembly in order to effect the bushing turn. The apparatus includes clamping means having
Apparatus and method of turning a bushing of a track chain link assembly is disclosed which enables the bushing to be turned in place in the link assembly, thereby eliminating the need to disassembly the link assembly in order to effect the bushing turn. The apparatus includes clamping means having three jaws for clamping the bushing, each of which has a deformable insert of an aluminum alloy so that, upon application of the clamping force, the shape of insert can change to accommodate one-sided sprocket wear on the bushing and insure intimate clamping contact therewith. Each of the deformable inserts is supported on an arcuate surface of a support block which has apertures and grooves for providing space into which material of the insert can extrude to facilitate the ability of insert to conform to the bushing. The grooves are oriented longitudinally so as to provide a mechanical interlock between the insert and the support blocks, thus eliminating any slippage between the block and insert as the links are being rotated.
대표청구항▼
1. Apparatus for turning a track bushing relative to its respective set of links of a track chain link assembly, said links being press fittedly connected to said bushing, comprising: means for clamping said bushing about its outer peripheral surface with a clamping force sufficient to restrain th
1. Apparatus for turning a track bushing relative to its respective set of links of a track chain link assembly, said links being press fittedly connected to said bushing, comprising: means for clamping said bushing about its outer peripheral surface with a clamping force sufficient to restrain the bushing against an application of a torque of sufficient magnitude to overcome the press fit connection between the bushing and the links, said clamping means having at least one deformable insert engageable against said bushing, said insert being of a sufficiently soft material to conform to and have intimate clamping contact with the bushing upon and under the application of said clamping force; and means for selectively rotating the links a predetermined angular distance relative to said bushing while said bushing is being restrained by said clamping means. 2. The apparatus of claim 1 wherein said clamping means includes: a rigid support block having an arcuate surface facing said bushing and on which said insert is carried, said arcuate surface having a plurality of discontinuities therein defining cavities into which the material of the insert is extruded upon application of said clamping force for facilitating the ability of the deformable insert to conform to the bushing. 3. The apparatus of claim 2 wherein said discontinuities include a plurality of grooves, disposed longitudinally of said arcuate surface of the block and defining a mechanical interlock between the block and insert to restrain rotational movement therebetween. 4. The apparatus of claim 3 wherein said rotating means includes at least one link engaging member and means for rotatably mounting said member for rotation about an axis disposed in general alignment with the longitudinal axis of the bushing being clamped by said clamping means, said link engaging member having a portion positionable in abutting engagement with at least one of said links connected to said bushing at a position disposed a predetermined radial distance from said axis. 5. The apparatus of claim 4 wherein said clamping means includes: at least three jaws, each of which includes one of said support blocks and one of said deformable inserts; a movable ram having a first inwardly facing surface; and a V-block having second and third inwardly facing surfaces, the three inwardly facing surfaces of the ram and V-block being disposed in a triangular configuration and each mounting a respective one of said jaws. 6. The apparatus of claim 1 wherein said rotating means includes a link engaging member and means for rotatably mounting said link engaging member about an axis disposed in general alignment with the longitudinal axis of the bushing being clamped by said clamping means, said link engaging member having a portion thereof positionable in abutting engagement with at least one of said links at a position disposed a predetermined radial distance from said axis. 7. The apparatus of claim 6 wherein said rotatable mounting means includes a pulley wheel which carries said link engaging member and is mounted for rotation about said axis, and said rotating means further includes a pair of jacks and a flexible pull, said flexible pull being entrained about said pulley wheel and connected thereto so as to impart a rotating torque to said wheel and having its opposite ends attached to a respective one of said jacks. 8. The apparatus of claim 7 wherein said link engaging member has a second portion positionable in abutting engagement with said link, said portions being spaced apart a sufficient distance to permit the ingress and movement of the link assembly therebetween and disposed to engage opposite upper and lower surfaces of the links for rotation of the links in opposite directions. 9. The apparatus of claim 8 wherein said rotating means includes two opposing sets of apparatus, each set being disposed on a respective one of the opposite sides of the clamping means, and each including one of said link engaging members, pulley wheels, flexible pulls, and pair of jacks, said link engaging members of each set engaging a respective one of said set of links. 10. The apparatus of claim 1 wherein said deformable insert is aluminum. 11. Apparatus for turning a track bushing relative to its respective set of links of a track chain link assembly, said links being secured to the bushing by means of a heavy press fit, comprising: means for rotating said links about the axis of said bushing; and means for clamping said bushing with a predetermined clamping force of a sufficient magnitude to maintain said bushing in a fixed position during rotation of said links, said clamping means including three jaws, a movable ram, and a fixed V-block, said ram carrying one of said jaws and said V-block carrying the second and third ones of said jaws, each of said jaws including a rigid support block and a deformable insert, said support block having an arcuate surface facing said bushing and said deformable insert having an arcuate configuration and being carried on the arcuate surface of said support block, said insert being of a sufficiently soft material to conform to and intimately contact said bushing upon and under the application of said clamping force. 12. The apparatus of claim 11 wherein said arcuate surface of the support block has a plurality of discontinuities therein defining cavities into which the material of the insert is extruded upon application of said clamping force for facilitating the ability of the insert to conform to the bushing. 13. The apparatus of claim 12 wherein said discontinuities include a plurality of grooves disposed longitudinally of said arcuate surface of the block, said grooves providing a mechanical interlock between the block and insert to restrain rotational movement therebetween when material of the insert has been extruded into said grooves. 14. The apparatus of claim 13 wherein said rotating means includes a link engaging member and means for rotatably mounting said link engaging member about an axis disposed in general alignment with the longitudinal axis of the bushing being clamped by said clamping means, said link engaging member having a portion thereof positionable in abutting engagement with at least one of said links at a position disposed a predetermined radial distance from said axis. 15. The apparatus of claim 14 wherein said rotatable mounting means includes a pulley wheel connected to said link engaging member and mounted for rotation about said axis, and said rotating means further includes a pair of jacks and a flexible pull, said flexible pull being entrained about said pulley wheel and connected thereto so as to impart a rotating torque to said wheel and having its opposite ends attached to a respective one of said jacks. 16. The apparatus of claim 15 wherein said link engaging member has a second portion positionable in abutting engagement with said link, said portions being spaced apart a sufficient distance to permit the ingress and movement of the link assembly therebetween and disposed to engage opposite upper and lower surfaces of the links for rotation of the links in opposite directions. 17. The apparatus of claim 16 wherein said rotating means includes two opposing sets of apparatus, each set being disposed as a respective one of the opposite sides of the clamping means, and each including one of said link engaging members, pulley wheels, flexible pulls, and pair of jacks, said link engaging members of each set engaging a respective one of said set of links. 18. The apparatus of claim 11 wherein said deformable insert is aluminum. 19. The apparatus of claim 11 further including means for selectively opening the second and third jaws on the V-block to enable the radial insertion of the bushing therebetween. 20. The apparatus of claim 19 wherein said opening means includes slide apparatus for slidably mounting each of the jaws on a respective one of the surfaces of the V-block, a jack, a piston connected to said jack, a pair of connecting rods and an arm on each of said jaws, said connecting rods being operatively connected between said piston and a respective one of said arms to move said jaws from a closed position to an open position upon the actuation of said jack. 21. A method of turning a bushing of a track chain link assembly, said bushing having a set of links press fittedly connected to its opposite ends, comprising the steps of: clamping said bushing with clamping means capable of exerting a predetermined clamping force on said bushing, said clamping means having at least one deformable insert engageable against said bushing, said insert being of a sufficiently soft material to conform to and have intimate clamping contact with the bushing upon and under application of said clamping force; and rotating said set of links a predetermined angular distance relative to said bushing. 22. The method of claim 21 wherein said link assembly includes a plurality of said bushings, each bushing having a set of said links press fittedly connected to the opposite ends thereof, further comprising the steps of: releasing said bushing from said clamping means; and sequentially moving each of the other of said bushings of the link assembly into a position to be clamped by said clamping means and repeating the clamping and rotating steps until all of the bushings of the link assembly have been rotated.
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이 특허에 인용된 특허 (6)
Hooker James A. (Peoria IL) Martin Dean W. (Peoria IL) Williamson Shellie O. (Peoria IL), Apparatus for rotating of track bushing by combined static and dynamic torque.
Vanlandingham Harold W. (Washington IL) Boggs Roger L. (East Peoria IL) Bullock David A. (East Peoria IL) Maytum James N. (Waverly IA), Track bush turning tool.
Vanlandingham Harold W. (Washington IL) Boggs Roger L. (East Peoria IL) Bullock David A. (East Peoria IL) Maytum James N. (Waverly IA), Track bush turning tool.
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