A multi-mode hydro-mechanical hybrid transmission device includes an input member, a hydraulic transmission mechanism, a mechanical transmission mechanism, a convergence mechanism, an output member, a clutch assembly, and a brake assembly. The clutch assembly connects an output end of the input member to an input end of the hydraulic transmission mechanism, the mechanical transmission mechanism, and the convergence mechanism. The clutch assembly connects an output end of the hydraulic transmission mechanism to the convergence mechanism. The clutch assembly connects the mechanical transmission mechanism to the convergence mechanism. The convergence mechanism is connected to the output member. Continuously changing transmission ratios are provided between the input member and the output member by adjusting a displacement ratio of the hydraulic transmission mechanism and selectively controlling engagement of the clutch assembly and the brake assembly.

A multi-mode hydro-mechanical hybrid transmission device includes an input member, a hydraulic transmission mechanism, a mechanical transmission mechanism, a convergence mechanism, an output member, a clutch assembly, and a brake assembly. The clutch assembly connects an output end of the input member to an input end of the hydraulic transmission mechanism, the mechanical transmission mechanism, and the convergence mechanism. The clutch assembly connects an output end of the hydraulic transmission mechanism to the convergence mechanism. The clutch assembly connects the mechanical transmission mechanism to the convergence mechanism. The convergence mechanism is connected to the output member. Continuously changing transmission ratios are provided between the input member and the output member by adjusting a displacement ratio of the hydraulic transmission mechanism and selectively controlling engagement of the clutch assembly and the brake assembly.

A multi-mode hydro-mechanical hybrid transmission device includes an input member, a hydraulic transmission mechanism, a mechanical transmission mechanism, a convergence mechanism, an output member, a clutch assembly, and a brake assembly. The clutch assembly connects an output end of the input member to an input end of the hydraulic transmission mechanism, the mechanical transmission mechanism, and the convergence mechanism. The clutch assembly connects an output end of the hydraulic transmission mechanism to the convergence mechanism. The clutch assembly connects the mechanical transmission mechanism to the convergence mechanism. The convergence mechanism is connected to the output member. Continuously changing transmission ratios are provided between the input member and the output member by adjusting a displacement ratio of the hydraulic transmission mechanism and selectively controlling engagement of the clutch assembly and the brake assembly.

In a hydraulic motor and a hydrostatic traction drive with such a hydraulic motor, the regulating of the displacement of the hydraulic motor is done via a pilot-operated pressure regulator. The feedforward controller calculates an estimated motor displacement and relays this to the pressure regulator.

In a hydraulic motor and a hydrostatic traction drive with such a hydraulic motor, the regulating of the displacement of the hydraulic motor is done via a pilot-operated pressure regulator. The feedforward controller calculates an estimated motor displacement and relays this to the pressure regulator.

The invention relates to a continuously variable transmission and a transmission system comprising said continuously variable transmission, wherein the continuously variable transmission comprises a first gear pump and a second gear pump, wherein each gear pump comprises a first gear and a second gear meshing with the first gear over an overlap distance in an overlap direction parallel to the first gear axis, wherein each gear pump further comprises an adjustment member for adjusting the pump volume, wherein the adjustment member of the first gear pump and the adjustment member of the second gear pump are interconnected by a connecting member for adjusting the pump volume of the first gear pump and the pump volume of the second gear pump in an inverse correlation to each other.

The invention relates to a continuously variable transmission and a transmission system comprising said continuously variable transmission, wherein the continuously variable transmission comprises a first gear pump and a second gear pump, wherein each gear pump comprises a first gear and a second gear meshing with the first gear over an overlap distance in an overlap direction parallel to the first gear axis, wherein each gear pump further comprises an adjustment member for adjusting the pump volume, wherein the adjustment member of the first gear pump and the adjustment member of the second gear pump are interconnected by a connecting member for adjusting the pump volume of the first gear pump and the pump volume of the second gear pump in an inverse correlation to each other.

A hydro-mechanical hybrid transmission device with two hydraulic transmission mechanisms includes an input member, a second hydraulic transmission mechanism, a rear planetary gear mechanism, an output member, a first hydraulic transmission mechanism, a front planetary gear mechanism, a clutch assembly, and a brake assembly. The clutch assembly connects the input member to the front planetary gear mechanism, the second hydraulic transmission mechanism, and the first hydraulic transmission mechanism, connects an output end of the first hydraulic transmission mechanism to the front planetary gear mechanism, connects the rear planetary gear mechanism to an output end of the second hydraulic transmission mechanism and the front planetary gear mechanism, and connects the rear planetary gear mechanism to the output member. The clutch assembly and the brake assembly provide a continuous transmission ratio between the input member and the output member.

A hydro-mechanical hybrid transmission device with two hydraulic transmission mechanisms includes an input member, a second hydraulic transmission mechanism, a rear planetary gear mechanism, an output member, a first hydraulic transmission mechanism, a front planetary gear mechanism, a clutch assembly, and a brake assembly. The clutch assembly connects the input member to the front planetary gear mechanism, the second hydraulic transmission mechanism, and the first hydraulic transmission mechanism, connects an output end of the first hydraulic transmission mechanism to the front planetary gear mechanism, connects the rear planetary gear mechanism to an output end of the second hydraulic transmission mechanism and the front planetary gear mechanism, and connects the rear planetary gear mechanism to the output member. The clutch assembly and the brake assembly provide a continuous transmission ratio between the input member and the output member.

A tractor according includes a running vehicle body, a floor provided on the running vehicle body and serving as a floor surface of an operation part in which a driver is located, a floor bracket configured to support the floor, a fuel tank provided below the floor, and a pedal configured to move the running vehicle body forward or backward and having pivot shafts provided on the floor bracket between the floor and the fuel tank.