An output shaft support structure includes: an output shaft; and a supporting body that supports the output shaft, the output shaft including: a rotating shaft; a first rolling bearing fixed to one end section of the rotating shaft; a second rolling bearing fixed to the other end section of the rotating shaft; and a secondary reduction driven gear including a boss section fixed to the rotating shaft. For a predetermined period, the boss section of the secondary reduction driven gear contacts the second rolling bearing, and a lower end of the rotating shaft is always separated from the supporting body.

An aspect of the present invention provides a speed reducer including a supporting block, an input gear rotatably supported on the supporting block, an intermediate gear meshing with the input gear, an output gear meshing with the intermediate gear, and a gear position changing mechanism configured to change a position of the intermediate gear relative to the input and output gears.

An aspect of the present invention provides a speed reducer including a supporting block, an input gear rotatably supported on the supporting block, an intermediate gear meshing with the input gear, an output gear meshing with the intermediate gear, and a gear position changing mechanism configured to change a position of the intermediate gear relative to the input and output gears.

A planetary reduction gear using a helical gear is configured such that a rear-stage sun gear is rotatably supported by a device housing via a radial bearing on one side in the direction of a center axis, and is rotatably supported by a rear-stage planetary carrier via a thrust bearing on the other side. The rear-stage planetary carrier is rotatably supported by the device housing via a rear-stage carrier bearing. A preload is applied to the thrust bearing by a preload mechanism mounted to the rear-stage planetary carrier. Displacement of the rear-stage sun gear caused by a thrust force generated due to engagement with a rear-stage planetary gear can be suppressed, and an angle error between input rotation and output rotation can be suppressed.

A mounting system for a portal lift assembly of an off-road vehicle includes a housing having a rear wall, a front wall, and a side wall. The rear wall includes an opening to receive the end of one of the vehicle's axles, and the front wall includes an opening to allow an output shaft to extend outward from the housing. The rear wall also includes an integral mounting brackets effective to mount the box to an upper A-arm to the rear wall, and a lower A-arm to the rear wall.

A mounting system for a portal lift assembly of an off-road vehicle includes a housing having a rear wall, a front wall, and a side wall. The rear wall includes an opening to receive the end of one of the vehicle's axles, and the front wall includes an opening to allow an output shaft to extend outward from the housing. The rear wall also includes an integral mounting brackets effective to mount the box to an upper A-arm to the rear wall, and a lower A-arm to the rear wall.

A method for setting an axial preload force of a roller screw drive (3) which is rotatably mounted in a housing (2) by means of bearings (4, 5) which are axially spaced apart from one another. The housing (2) is split transversely with respect to the thrust rod (7) into a first and a second housing part (8, 9). The roller screw drive (3) is inserted with the two bearings (4, 5) into the second housing part (9). An axial preload force is applied which is transmitted from the first bearing (4) via the roller screw drive (3) to the second bearing (5). An axial load spacing (“X”) between the bearing supporting surface of the first bearing (4) and a second housing edge (31) of the second housing part (9) is measured. An adjusting nut (10) is screwed into the first housing part (8) until an axial adjustable spacing between the end-side adjusting nut supporting surface (12) and the first housing edge (30) of the first housing part (8) is the same size as the measured axial load spacing (“X”). The adjusting nut (10) is then secured in place in the first housing part (8), and the two housing parts (8, 9) are connected to one another, with the result that both bear against one another by their housing edges (30, 31).

A transmission, including an outer shell (1), an inner shell (2), a drive disk (3), a plurality of T-shaped teeth (4), a gear (5), a tooth seat (6), an adjustable nut (7), balls (8), inner balls (9), outer balls (10), an inner protective frame (11), an outer protective frame (12), rollers (13), a first sealing ring (14), a second sealing ring (15) and a third sealing ring (16). Transmission clearance can be adjusted freely at any time, the meshing of the T-shaped tooth and the gear is a real surface meshing, and almost all the teeth participate in force transmission simultaneously. Therefore, the transmission has high precision, high mechanical properties, and long service life.

The invention relates to a worm drive comprising a worm shaft and a first receiving unit. The worm shaft is rotatably mounted in the first receiving unit. Furthermore, the worm drive comprises a worm wheel and a second receiving unit. The worm wheel is rotatably mounted in the second receiving unit. The first receiving unit is arranged on the second receiving unit and the rotatably mounted worm shaft is in contact with the worm wheel of the second receiving unit in order to transmit a torque. Furthermore, the worm drive comprises guide pins for detachably connecting the first receiving unit to the second receiving unit. More particularly, the first receiving unit receives at least part of the guide pins and the second receiving unit is connected to one of the guide pins, preferably to a first end of the guide pin. A spring element is arranged on a second end of the guide pin between the first receiving unit and a fastening means.

The invention relates to a worm drive comprising a worm shaft and a first receiving unit. The worm shaft is rotatably mounted in the first receiving unit. Furthermore, the worm drive comprises a worm wheel and a second receiving unit. The worm wheel is rotatably mounted in the second receiving unit. The first receiving unit is arranged on the second receiving unit and the rotatably mounted worm shaft is in contact with the worm wheel of the second receiving unit in order to transmit a torque. Furthermore, the worm drive comprises guide pins for detachably connecting the first receiving unit to the second receiving unit. More particularly, the first receiving unit receives at least part of the guide pins and the second receiving unit is connected to one of the guide pins, preferably to a first end of the guide pin. A spring element is arranged on a second end of the guide pin between the first receiving unit and a fastening means.