초록 ▼

A tracked vehicle has smooth driving and idler wheels (6, 7, 8, 9), which frictionally transmit the tractive force to tracks (3, 4), e.g. rubber tracks, and which are mounted on a frame ( 3) of the vehicle which carries at least one driving engine (11 ). To avoid the slipping of the tracks on the dr

A tracked vehicle has smooth driving and idler wheels (6, 7, 8, 9), which frictionally transmit the tractive force to tracks (3, 4), e.g. rubber tracks, and which are mounted on a frame ( 3) of the vehicle which carries at least one driving engine (11 ). To avoid the slipping of the tracks on the driving and idler wheels, both the two front idler wheels (6, 7) and the two rear idler wheels (8, 9) are respectively driven. The front wheels are hydraulically driven, while the rear wheels may be hydraulically or mechanically driven.

대표청구항 ▼

The invention claimed is: 1. A tracked crawler vehicle comprising: a vehicle frame; at least one driving engine mounted on said vehicle frame; left and right crawler tracks respectively having smooth inner contact surfaces; plural drive and idler wheels including left and right front wheels and le

The invention claimed is: 1. A tracked crawler vehicle comprising: a vehicle frame; at least one driving engine mounted on said vehicle frame; left and right crawler tracks respectively having smooth inner contact surfaces; plural drive and idler wheels including left and right front wheels and left and right rear wheels that are each respectively rotatably supported relative to said vehicle frame and are each respectively rotationally drivable by said at least one driving engine, wherein said left crawler track is carried and driven on said left front and rear wheels, said right crawler track is carried and driven on said right front and rear wheels, and said front and rear wheels have smooth drive surfaces which respectively contact said smooth inner contact surfaces and thereby are adapted to frictionally transmit a tractive force to a respective one of said crawler tracks carried and driven thereon; hydraulically actuatable multi-disk brakes respectively provided for each of said front and rear wheels; and a drive arrangement interposed and connected for drive power transmission between said at least one driving engine and said front and rear wheels so as to drive said front and rear wheels while avoiding slippage between said front and rear wheels and said crawler tracks, wherein said drive arrangement comprises first left and right hydraulically operating drive units respectively connected to said left and right front wheels. 2. The tracked crawler vehicle according to claim 1, wherein said crawler tracks are rubber tracks. 3. The tracked crawler vehicle according to claim 1, wherein said drive arrangement further comprises second left and right hydraulically operating drive units respectively for said left and right rear wheels. 4. The tracked crawler vehicle according to claim 3, wherein said at least one engine comprises at least one internal combustion engine, and said drive arrangement further comprises at least one hydraulic pump connected to and adapted to be driven by said at least one internal combustion engine and hydraulically connected and adapted to provide hydraulic power to said first and second left and right hydraulically operating drive units. 5. The tracked crawler vehicle according to claim 4, wherein each one of said hydraulically operating drive units respectively comprises a respective hydraulic motor. 6. The tracked crawler vehicle according to claim 5, wherein said drive arrangement for said front wheels further comprises left and right reduction transmissions respectively interposed between said hydraulic motors and said left and right front wheels. 7. The tracked crawler vehicle according to claim 1, wherein said rear wheels respectively have a larger diameter than said front wheels, and wherein said drive arrangement for said front wheels further comprises left and right reduction transmissions respectively interposed between said first left and right hydraulically operating drive units and said left and right front wheels. 8. The tracked crawler vehicle according to claim 7, wherein said first left and right hydraulically operating drive units respectively comprise respective hydraulic motors that are components of a retrofit kit installed in said tracked crawler vehicle. 9. The tracked crawler vehicle according to claim 1, wherein said drive arrangement further comprises a mechanical drive that is mechanically connected and adapted to mechanically transmit drive power to said left and right rear wheels, and wherein said hydraulically operating drive units respectively comprise respective hydraulic motors for said left and right front wheels. 10. The tracked crawler vehicle according to claim 9, wherein said mechanical drive comprises a mechanical differential between said left and right rear wheels. 11. A combination of an agricultural tractor and a retrofit kit retrofitted onto said tractor that has a vehicle frame, and at least lone driving engine mounted on said vehicle frame, wherein said retrofit kit or said tractor includes left and right rear wheels connected to said at least one engine for drive power transmission from said at least one engine to said rear wheels, and wherein said retrofit kit includes: left and right front wheels rotatably supported relative to said vehicle frame; left and right crawler tracks respectively carried and driven on said left front and rear wheels and said right front and rear wheels; at least one hydraulic pump connected to and adapted to be driven by said at least one driving engine; left and right hydraulically operating drive units respectively comprising left and right hydraulic motors connected to and adapted to drive said left and right front wheels; and hydraulic lines connecting said hydraulic motors to said at least one hydraulic pump. 12. The combination according to claim 11, wherein said tractor includes a mechanical drive connected between said at least one driving engine and said rear wheels. 13. A tracked crawler vehicle comprising: a vehicle frame; at least one driving engine mounted on said vehicle frame; left and right crawler tracks respectively having smooth inner contact surfaces; plural drive and idler wheels including left and right front wheels and left and right rear wheels that are each respectively rotatably supported relative to said vehicle frame and are each respectively rotationally drivable by said at least one driving engine, wherein said left crawler track is carried and driven on said left front and rear wheels, said right crawler track is carried and driven on said right front and rear wheels, and said front and rear wheels have smooth drive surfaces which respectively contact said smooth inner contact surfaces and thereby are adapted to frictionally transmit a tractive force to a respective one of said crawler tracks carried and driven thereon; and a drive arrangement interposed and connected for drive power transmission between said at least one driving engine and said front and rear wheels, wherein said drive arrangement comprises first left and right hydraulically operating drive units respectively connected to said left and right front wheels as well as second left and right hydraulically operating drive units respectively connected to said left and right rear wheels. 14. The tracked crawler vehicle according to claim 13, wherein said at least one engine comprises at least one internal combustion engine, and said drive arrangement further comprises at least one hydraulic pump connected to and adapted to be driven by said at least one internal combustion engine and hydraulically connected and adapted to provide hydraulic power to said first and second left and right hydraulically operating drive units. 15. The tracked crawler vehicle according to claim 14, wherein each one of said hydraulically operating drive units respectively comprises a respective hydraulic motor. 16. The tracked crawler vehicle according to claim 15, wherein said drive arrangement for said front wheels further comprises left and right reduction transmissions respectively interposed between said hydraulic motors and said left and right front wheels. 17. The tracked crawler vehicle according to claim 13, wherein each one of said crawler tracks respectively has a lengthwise stabilizing rib that protrudes inwardly from and runs longitudinally along said smooth inner contact surface thereof, and wherein each one of said front and rear wheels respectively has a circumferential groove that is recessed into and extends circumferentially around said smooth drive surface thereof and that receives therein said stabilizing rib of a respective one of said crawler tracks. 18. The combination according to claim 11, wherein each one of said crawler tracks respectively has a smooth inner contact surface and a lengthwise stabilizing rib that protrudes inwardly from and runs longitudinally along said smooth inner contact surface thereof, and wherein each one of said front and rear wheels respectively has a smooth drive surface and a circumferential groove that is recessed into and extends circumferentially around said smooth drive surface thereof and that receives therein said stabilizing rib of a respective one of said crawler tracks. 19. The tracked crawler vehicle according to claim 1, wherein each one of said crawler tracks respectively has a lengthwise stabilizing rib that protrudes inwardly from and runs longitudinally along said smooth inner contact surface thereof, and wherein each one of said front and rear wheels respectively has a circumferential groove that is recessed into and extends circumferentially around said smooth drive surface thereof and that receives therein said stabilizing rib of a respective one of said crawler tracks.