摘要:
A hydrostatic continuously variable transmission includes a hydraulic pump and a hydraulic motor, supported by a common support shaft, and hydraulically connectable to each other through a hydraulic circuit including an inside passage and an outside passage. A clutch device includes a valve spool, which is slidably disposed in a hollow internal bore formed in the transmission support shaft. The valve spool is operable to make or interrupt fluid communication between the inside passage and the outside passage, according to the movement thereof. A governor mechanism is mounted to a pump casing of the hydraulic pump, and the governor mechanism generates a governor force corresponding to the rotating speed of a clutch cap, by use of centrifugal force generated by the rotation thereof. The valve spool is effectively moved in the hollow internal bore, using the governor force generated from the governor mechanism, to engage or disengage the clutch.
摘要:
A hydrostatic continuously variable transmission is formed by connecting a hydraulic pump of a fixed capacity type and a hydraulic motor of a variable capacity type via a hydraulic closed circuit. In this transmission, a pump cylinder and a motor cylinder are connected via a distributing valve to form an output rotor, the output rotor is arranged on a transmission output shaft, one side end face in an axial direction of the output rotor is touched to a regulating part formed on the transmission output shaft, the other side end face is touched to a fitting member attached to the transmission output shaft, and the output rotor is axially positioned and attached on the transmission output shaft.
摘要:
A hydrostatic continuously variable transmission includes a hydraulic pump and a hydraulic motor, supported by a common support shaft, and hydraulically connectable to each other through a hydraulic circuit including an inside passage and an outside passage. A clutch device includes a valve spool, which is slidably disposed in a hollow internal bore formed in the transmission support shaft. The valve spool is operable to make or interrupt fluid communication between the inside passage and the outside passage, according to the movement thereof. A governor mechanism is mounted to a pump casing of the hydraulic pump, and the governor mechanism generates a governor force corresponding to the rotating speed of a clutch cap, by use of centrifugal force generated by the rotation thereof. The valve spool is effectively moved in the hollow internal bore, using the governor force generated from the governor mechanism, to engage or disengage the clutch.
摘要:
Distributing valves of a swash plate type hydraulic drive transmission can make a cylinder block smaller and reduce the number of processes and the number of parts. Distributing valves alternately switch, corresponding to the axial reciprocating motion of plungers, communication and cutoff between communication passages communicated to oil chambers opening to the inner surface of cylinder holes and low pressure ports and high pressure ports communicated to a low pressure oil passage and a high pressure oil passage opening to the inner surface of the cylinder holes.
摘要:
In a hydrostatic continuously variable transmission, a hydraulic pump and a hydraulic motor are connected through a hydraulic closed circuit and the capacity of the hydraulic motor is varied to vary the speed continuously. The transmission has a valve spool in a spool hole made in a transmission output shaft which rotatably holds the hydraulic pump and hydraulic motor; and the transmission output shaft incorporates outer branch oil paths which are connected with an outer passage and open to the spool hole, and an inner branch oil path which is connected with an inner passage and open to the spool hole. A right groove on the outer periphery of the valve spool enables the valve spool to move between a clutch release position in which the outer branch oil paths and the inner branch oil path are connected and a clutch engagement position in which a central land of the valve spool at least covers a high pressure clutch port; and the right groove is connected to the outside through a discharge oil path with an orifice.
摘要:
In a hydrostatic continuously variable transmission, a hydraulic pump and a hydraulic motor are connected through a hydraulic closed circuit and the capacity of the hydraulic motor is varied to vary the speed continuously. The transmission has a valve spool in a spool hole made in a transmission output shaft which rotatably holds the hydraulic pump and hydraulic motor; and the transmission output shaft incorporates outer branch oil paths which are connected with an outer passage and open to the spool hole, and an inner branch oil path which is connected with an inner passage and open to the spool hole. A right groove on the outer periphery of the valve spool enables the valve spool to move between a clutch release position in which the outer branch oil paths and the inner branch oil path are connected and a clutch engagement position in which a central land of the valve spool at least covers a high pressure clutch port; and the right groove is connected to the outside through a discharge oil path with an orifice.
摘要:
An electric motorcycle in which a power drive unit, a motive power generation motor, etc. can be efficiently cooled is provided.An electric motorcycle 1 in which a PDU 18 and a motive power generation motor 16 for traveling are secured to a swing arm 13 swinging around a pivot shaft 12 and power from a battery 9 is supplied through the PDU 18 to the motive power generation motor 16, characterized in a hollow inside of the swing arm 13 is partitioned into an air introducing space 24 and an equipment fixing space 23 by a partition wall 25a, the PDU 18 is secured in the equipment fixing space 23 so as to be in close contact with the partition wall 25a, and a fin 40 extending from the partition wall 25a to the air introducing space 24 are formed at a portion in the air introducing space 24 which corresponds to the fixed portion of the PDU 18.
摘要:
In twin clutch device used in an engine transmission, there are coaxially and adjacently arranged a first disk clutch and a second disk clutch of a hydraulic pressure type that displace a pressing member in an axial direction with externally supplied hydraulic pressure to exert a predetermined engagement force, and the first disk clutch and the second disk clutch respectively have: an engagement side hydraulic chamber that gives the pressing member a pressing force towards a clutch engagement side; and a pressure compensation hydraulic chamber that gives the pressing member a pressing force toward a clutch disengagement side to compensate a pressure of a returning action thereof. Furthermore in this twin clutch device there are provided: a first actuator that controls hydraulic pressure supply to the engagement side hydraulic pressure chamber of the first disk clutch, and a second actuator that controls hydraulic pressure supply to the engagement side hydraulic chamber of the second disk clutch; and a hydraulic pressure cut-off device that brings the first disk clutch and the second disk clutch into a disengagement state.
摘要:
To provide a power unit mounted for a vehicle, such as a motorcycle, wherein the power unit is attached to a transmission actuating device or attached to a clutch actuating device, or attached to both actuating units. A power unit for a vehicle having an internal combustion engine mounted in a condition where a crank shaft is oriented in the longitudinal direction of the vehicle body, and having a transmission arranged behind the internal combustion engine, wherein one or both of a transmission actuating electric motor for driving an transmission actuating device of the transmission and a clutch actuating electric motor for driving a clutch actuating device of a clutch are arranged in a rear section of said power unit.
摘要:
A bending strain measurement apparatus for an abdomen of an anthropomorphic dummy comprises a band constituted of an elastic thin plate member. The band is arranged in a longitudinal direction of the abdomen, has one end thereof fixed in the vicinity of the abdomen of the dummy, and a plurality of gauges are arranged in a longitudinal direction of the band for detecting a bending strain of the abdomen when an obstacle collides with the abdomen. A measuring device measures time history of the bending strain based on bending strain of the respective portions of the band detected by the gauges arranged on the band, as a time transition of the bending strain of respective portions of the band.