초록 ▼

The present disclosure relates to a hydraulic transmission assembly for a ground vehicle comprises a pump unit and a hydraulic motor assembly connected to the pump unit. The pump unit includes a driven shaft configured to operably connect to a motor of the ground vehicle. The hydraulic motor assembl

The present disclosure relates to a hydraulic transmission assembly for a ground vehicle comprises a pump unit and a hydraulic motor assembly connected to the pump unit. The pump unit includes a driven shaft configured to operably connect to a motor of the ground vehicle. The hydraulic motor assembly includes a motor housing configured to rotatably mount to a wheel assembly of the ground vehicle. The housing has a central opening. A stationary output shaft has a first end section received in the central opening and a second end section configured to rigidly attach to a frame of the ground vehicle. The output shaft includes at least one internal fluid passage in fluid communication with at least one fluid passage of the pump unit. Pressurization of the hydraulic motor assembly via the pump unit rotates the motor housing relative to the stationary output shaft which, in turn, rotates the wheel assembly in one of a first direction and second direction.

대표청구항 ▼

1. A hydraulic transmission assembly for an associated ground vehicle comprising: a pump unit configured to operably connect to an associated motor of the associated ground vehicle;a manifold fluidly connected to said pump unit, the manifold including means for mounting to the associated ground vehi

1. A hydraulic transmission assembly for an associated ground vehicle comprising: a pump unit configured to operably connect to an associated motor of the associated ground vehicle;a manifold fluidly connected to said pump unit, the manifold including means for mounting to the associated ground vehicle; anda hydraulic motor assembly connected to said manifold, said motor assembly including: a motor housing configured to rotatably mount to an associated wheel assembly of the associated ground vehicle,a stationary output shaft having a first end section received in said motor housing and a second end section configured to rigidly attach to an associated frame of the associated ground vehicle, said output shaft including at least one internal fluid passage in fluid communication with at least one fluid passage of said pump unit, said output shaft further including another internal fluid passage communicating with a pressurizable brake assembly at least partially housed in said hydraulic motor assembly, pressurization of said another internal fluid passage disengaging said brake assembly,wherein pressurization of said hydraulic motor assembly via said pump unit rotates said motor housing relative to said stationary output shaft which, in turn, rotates the associated wheel assembly in one of a first direction and second direction,wherein said manifold is fluidly connected to said at least one passage of said pump unit and said at least one passage of said output shaft via at least one internal passage, wherein said manifold fluidly connects said pump unit and said hydraulic motor assembly with no intervening external fluid lines. 2. The hydraulic transmission assembly of claim 1, wherein said output shaft includes a first defined fluid passage and a second defined fluid passage, each of said first and second defined fluid passage being in fluid communication with said at least one fluid passage of said pump unit, wherein pressurization of said first defined fluid passage rotates said motor housing in said first direction, wherein pressurization of said second defined fluid passage rotates said motor housing in said second direction. 3. The hydraulic transmission assembly of claim 2, wherein said output shaft includes a third defined fluid passage in selective fluid communication with one of said first and second defined fluid passages, said third defined fluid passage communicating with said pressurizable brake assembly. 4. The hydraulic transmission assembly of claim 3, further including a valve member, said valve member allowing selective communication between either of said first defined fluid passage or said second defined fluid passage, when either of said first or second passages are pressurized, and said third defined fluid passage. 5. The hydraulic transmission assembly of claim 1, further comprising a rotor assembly fixedly mounted to said motor housing, said rotor assembly including at least one fluid passage in communication with said at least one internal fluid passage of said output shaft. 6. The hydraulic transmission assembly of claim 4, further including a second valve member, said second valve member operably coupled to said third defined fluid passage, said second valve member configured to direct pressurized fluid out of said hydraulic motor assembly in response to a pressure surge. 7. The hydraulic transmission assembly of claim 1, wherein said motor housing includes a first housing section mounted to a second housing section, said first and second housing sections defining a pressurizable brake chamber for housing said pressurizable brake assembly. 8. The hydraulic transmission assembly of claim 7, wherein said third defined fluid passage is in communication with said pressurizable brake chamber. 9. The hydraulic transmission assembly of claim 1, further including a relief valve member for relieving a pressure build-up in said hydraulic transmission assembly, wherein said relief valve member includes a fluid leakage hole, said leakage hole allowing fluid to flow to at least one of a tank dump and a heat exchanger for dissipation of heat. 10. The hydraulic transmission assembly of claim 1, further comprising means for disengaging said brake assembly during a static condition of said hydraulic transmission assembly. 11. The hydraulic transmission assembly of claim 1, wherein said pressurizable brake assembly includes a first brake disk and a second brake disk, said first brake disk being connected to said output shaft and said second brake disk being connected to said motor housing. 12. The hydraulic transmission assembly of claim 11, further comprising: a piston disposed in said motor housing adjacent at least one of the first and second brake disks, the piston cooperating with said motor housing to at least partially define a brake pressure chamber of said pressurizable brake assembly, the motor housing and the first and second defined fluid passages being configured such that pressurization of either passage results in pressurization of said brake pressure chamber; anda biasing member disposed in said motor housing and contacting said piston, said biasing member urging said piston toward at least one of the first and second brake disks. 13. The hydraulic transmission assembly of claim 1, further comprising a rotor assembly cooperating with said output shaft, said rotor assembly being in communication with said first and second defined fluid passages, wherein said rotor assembly is a gerotor assembly including a rotor and a stator, and further comprising a drive link having a first end and a second end, said first end being connected to said rotor, said second end being connected to said output shaft, wherein said motor housing receives said gerotor assembly and said drive link. 14. A hydraulic transmission assembly for an associated ground vehicle comprising: a pump unit;a hydraulic motor assembly fluidly connected to said pump unit, said motor assembly including: a rotatable housing configured to connect a wheel assembly of the associated ground vehicle; andan output shaft at least partially disposed in said housing and configured to secure a frame of the associated ground vehicle, said output shaft including first and second independently pressurizable fluid passages in fluid communication with said pump unit;wherein pressurization of at least one of said first and second passages via said pump unit rotates said motor housing relative to said output shaft which, in turn, rotates the wheel assembly in one of a first direction and second direction;a manifold fluidly connected to said pump unit and said first and second fluid passages of said output shaft, wherein said manifold fluidly connects said pump unit and said hydraulic motor assembly with no intervening external fluid lines;a radiator fluidly connected to said hydraulic motor assembly; anda valve in the hydraulic motor assembly configured to allow fluid to flow to said radiator for dissipation of heat while maintaining pressure in at least one of the first and second passages. 15. The hydraulic transmission assembly of claim 14, wherein said motor housing at least partially defines a pressurizable brake chamber for at least partially housing a pressure released brake assembly, wherein said output shaft includes a third defined fluid passage in selective fluid communication with one of said first and second defined fluid passages, said third defined fluid passage communicating with said brake assembly. 16. The hydraulic transmission assembly of claim 15, wherein said valve is operably coupled to said third fluid passage. 17. The hydraulic transmission assembly of claim 16, wherein said valve includes: a stopper including a through hole for allowing fluid to flow to said radiator, anda biasing member for biasing the stopper against an opening of said third fluid passage. 18. The hydraulic transmission assembly of claim 15, wherein said valve is disposed in said third passage. 19. The hydraulic transmission assembly of claim 15, wherein said pressure released brake assembly includes a first brake disk and a second brake disk, said first brake disk being connected to said output shaft and said second brake disk being connected to said housing. 20. The hydraulic transmission assembly of claim 19, further comprising: a piston disposed in said housing adjacent at least one of the first and second brake disks, the piston cooperating with said housing to at least partially define said pressurizable brake chamber, the housing and the first and second fluid passages being configured such that pressurization of either passage results in pressurization of said brake chamber; anda biasing member disposed in said housing and contacting said piston, said biasing member urging said piston toward at least one of the first and second brake disks.