Pump and center section for hydrostatic transmission
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16D-031/02
출원번호
US-0022323
(2001-12-14)
발명자
/ 주소
Langenfeld, Thomas J.
출원인 / 주소
Hydro-Gear Limited Partnership
대리인 / 주소
Neal, Garber & Eisenberg, LLP
인용정보
피인용 횟수 :
13인용 특허 :
5
초록▼
A hydraulic transmission having a hydraulic pump, a hydraulic motor and a center section having a pump running surface on which the hydraulic pump rotates and a motor running surface of which the hydraulic motor rotates. The center section has porting by which the hydraulic pump and the hydraulic mo
A hydraulic transmission having a hydraulic pump, a hydraulic motor and a center section having a pump running surface on which the hydraulic pump rotates and a motor running surface of which the hydraulic motor rotates. The center section has porting by which the hydraulic pump and the hydraulic motor are in fluid communication wherein the porting terminates in a pair of equidistantly spaced, generally arcuate shaped openings. The pump running surface includes a plurality of generally v-shaped grooves extending from each of the ends of the generally arcuate shaped openings.
대표청구항▼
A hydraulic transmission having a hydraulic pump, a hydraulic motor and a center section having a pump running surface on which the hydraulic pump rotates and a motor running surface of which the hydraulic motor rotates. The center section has porting by which the hydraulic pump and the hydraulic mo
A hydraulic transmission having a hydraulic pump, a hydraulic motor and a center section having a pump running surface on which the hydraulic pump rotates and a motor running surface of which the hydraulic motor rotates. The center section has porting by which the hydraulic pump and the hydraulic motor are in fluid communication wherein the porting terminates in a pair of equidistantly spaced, generally arcuate shaped openings. The pump running surface includes a plurality of generally v-shaped grooves extending from each of the ends of the generally arcuate shaped openings. mmer elements. 6. The modular unit of claim 1, wherein said hammer elements are each constituted by a cylindrical body which is rotationally supported concentrically at the end of each upper secondary cylindrical magazine and comprises, interposed, elastic return means and, on a lower face thereof, a percussion tooth which protrudes for alternating action on a selected punch. 7. The modular unit of claim 6, wherein said elastic return means are constituted by a plurality of reactive compression springs which are interposed between each one of said hammer elements and a corresponding one of said upper secondary cylindrical magazines. 8. The modular unit of claim 3, wherein said slider means is constituted, for each lower secondary die-holder, by a flat plate provided with a hollow cylindrical seat, which can be slidingly inserted, so as to be guided on both sides, in a corresponding receptacle formed in said main die-holder. 9. The modular unit of claim 8, wherein each hollow cylindrical seat is vertically aligned, in an active configuration, on an underlying opening which is formed in said worktable of the punching machine. 10. The modular unit of claim 8, wherein said locking elements are constituted, for each plate, by a prism-shaped contoured body which can be arranged in contact with an outer side of each one of said plates, said body being lockable in contact with said outer side by way of screw means. 11. The modular unit of claim 1, wherein said third motor means for controlled rotation comprise: a third motor having a vertical shaft; a corresponding transmission sprocket which is keyed onto the vertical shaft of said third motor rigidly associated with said worktable of the punching machine; and a perimetric set of teeth which is formed in said lower main cylindrical magazine and is coupleable to said corresponding transmission sprocket. 12. The modular unit of claim 1, wherein said first and third motor means are actuatable so as to rotate synchronously in angular steps which are controlled and counted so as to keep said punches vertically aligned with said dies. 13. A punching machine comprising: a turret at an upper portion of said machine; a worktable below said turret; an upper main cylindrical magazine rotatably supported by said turret and provided with a plurality of angularly spaced radial seats, a respective upper secondary cylindrical magazine accommodated in each of said radial seats, a plurality of punches in each of said secondary magazines, and a corresponding number of hammer elements above the punches in each of the secondary magazines, each of the secondary magazines being rotatable in the upper main cylindrical magazine; a corresponding lower main cylindrical die-holder magazine received in said worktable, rotatable synchronously with said upper cylindrical magazine and vertically aligned coaxially therewith, said lower main cylindrical die-holder magazine having angularly spaced further radial seats adapted to register with the radial seats of said upper main cylindrical magazine; lower secondary die-holders accommodated in said further radial seats and supported so as to be vertically aligned with said upper secondary magazines, each die-holder being provided with a plurality of dies in a number equal to a number of said punches in a corresponding upper secondary magazine; a first motor for producing a controlled rotation of said upper main cylindrical magazine with respect to said turret; a second motor with alternating operation for actuating, in controlled rotation, said hammer elements with respect to the corresponding secondary cylindrical magazines, said second motor having a vertically protruding transmission shaft, and a sprocket keyed onto said transmission shaft for engagement with corresponding sets of teeth formed perimetrically on each of said hammer elements; a third motor for actuating in a controlled rotation said lower main cylindrical magazine synchronously with said upp
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이 특허에 인용된 특허 (5)
Hauser Raymond, Differential for use in a vehicle.
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