摘要:
The invention regards a device for the selection and the displacement of actuation members of a gearbox for motor vehicles that comprises a plurality of forward gear ratios and a reverse gear ratio, each associated to a respective actuation member. The device includes a mechanism for the assistance to the engagement of the reverse gear.
摘要:
A hand-held power tool includes: a shiftable transmission for driving a drive shaft, which transmission is situated in a gear housing and is shiftable at least between a first gear and a second gear via a shifting member; and a pivotably supported actuating element, which is configured as a bistable spring element and situated, at least in sections, in the area between the shifting member and the gear housing, is associated with the shifting member. The bistable spring element is actuatable for the gear shifting, and assumes a stable shift position in at least one shift position of the shifting member associated with the first or second gear, and assumes an unstable position in an intermediate position of the shifting member which is situated between shift positions of the shifting member associated with the first and second gears.
摘要:
A shifting arrangement for a motor vehicle gearbox has a housing which defines a longitudinal axis. A rod is mounted axially displaceably in relation to the housing and can be coupled to a shifting clutch arrangement. A shift shaft is mounted rotatably in relation to the housing and is oriented transversely with respect to the longitudinal axis. The shift shaft being coupled to the rod by means of a driver device in such a way that the rod is displaced in a first longitudinal direction in the case of a rotation of the shift shaft in a first rotational direction. The driver device is a freewheel driver device which is configured in such a way that the rod is decoupled from the shift shaft in the case of a rotation of the shift shaft in a second rotational direction.
摘要:
A gear shifting method and device of a multistage transmission in which gear shift of a main transmission and an auxiliary transmission is mechanically operated by operation of one shift lever. The device is provided with: a cam mechanism that has a select operation output member and a shift operation output member, which separate, into shift operation and select operation for each direction, operation by operation of one shift lever that moves along at least one H-shaped shift pattern, a first cam groove that operates by the select operation, and operates a shift mechanism for the auxiliary transmission that shifts a shift fork for the auxiliary transmission, and a second cam groove that operates a select mechanism that selects a target shift fork from among a plurality of shift forks for the main transmission; and a shift mechanism for the main transmission that operates by the shift operation, and shifts the shift fork for the main transmission selected by the select operation.
摘要:
A transmission for a vehicle is proposed which comprises one main transmission MT with one input shaft (1) and one output shaft (2), the same as at least one range change group (3) and one power take off, wherein one countershaft (5) integrated in the range change group (3) for actuating a power take off, the countershaft (5) being connectable, via a gear change sleeve unit (6), with the input shaft (1) and the output shaft (2) and the power take off can be driven independently of the operating state of the vehicle.
摘要:
A drive control is disclosed which is particularly useful for machines having a hydrostatic transmission or ground drive pump, such as a tractor. A shift assembly controls the input to the hydrostatic transmission, and it includes a shift lever which is movable by a bellcrank mechanism in opposite directions from a neutral position into forward or reverse. The drive control further includes a rocking foot pedal which is connected by an actuating linkage to both the shift lever and the hydrostatic transmission. The desired direction of operation is set with the shift assembly, and the speed of movement in the selected direction is proportional to the amount the foot pedal is depressed. The foot pedal assembly includes a heel tab actuator which can be used as a manual override for the purpose of braking by bringing the hydrostatic transmission back to neutral while maintaining the transmission in the selected directional position. An automatic override mechanism is also provided such that when the foot pedal is released, for any reason, the automatic override mechanism returns the hydrostatic transmission to neutral without affecting the directional position setting. A further feature of the invention resides in the selector plate for directional control which includes a projection for actuating a neutral start switch.
摘要:
In a vehicle drive transmission device, a transmission includes an intermesh first engagement device, a frictional second engagement device, a first drive device configured to drive the first engagement device, and a second drive device configured to drive the second engagement device. The first drive device includes a first shift drum, a first cam mechanism configured to convert rotational motion of the first shift drum into linear motion, and a first transmission mechanism configured to perform the linear motion. The second drive device includes a second shift drum, a second cam mechanism configured to convert rotational motion of the second shift drum into linear motion, and a second transmission mechanism configured to perform the linear motion. The first shift drum and the second shift drum are connected so as to rotate integrally with each other via a drive shaft. A drum drive source is provided to drive the drive shaft.
摘要:
A vehicle includes a body frame, an engine, a transmission, a transmission case, and a shift actuator. The engine includes an engine case attached to the body frame, and a crankshaft supported by the engine case. The transmission case is spaced apart from the engine case, and houses the transmission. The shift actuator is connected to a shift drum of the transmission. At least a portion of the transmission case overlaps with the engine case as viewed along the axis of the crankshaft. The shift actuator is fixed to the transmission case.
摘要:
A hand-held power tool which includes a shiftable transmission that is shiftable at least between a first gear and a second gear via a shifting member, in which the shifting member is coupled to a spring element, which for the gear shifting is indirectly or directly actuatable at least via a first and a second shifting element. A coupling element which is coupleable to the spring element is associated with the first shifting element, and the coupling element is configured for allowing gear shifting by actuating the first shifting element only for the case that the second shifting element is in a predefined gear shift position.
摘要:
The invention regards a device for the selection and the displacement of actuation members of a gearbox for motor vehicles that comprises a plurality of forward gear ratios and a reverse gear ratio, each associated to a respective actuation member. The device includes a mechanism for the assistance to the engagement of the reverse gear.