A drive shaft (1) includes a telescopic shaft (3) having an outer tubular shaft (9) and an inner tubular shaft (11) inserted slidable into the outer shaft (9). A lubrication system is further provided, including: a lubricant receiving chamber (39) housed in the inner shaft (11); a lubricant distribution block (41) housed in the inner shaft (11); lubricant supply ports (11.9) for supplying lubricant from the lubricant distribution block (41), through a tubular wall of the inner shaft (11), towards a gap between the inner shaft (11) and the outer shaft (9); at least a lubricant transferring duct (47.1; 47.2) from the receiving chamber (39) to the distribution block (41). wherein the supplying ports (11.9) are distributed in at least two positions offset in direction of the axis (A-A) of the telescopic shaft (3).

A hub bearing unit includes a hub, a bearing unit having an internal seat, an outer ring connected to the internal seat, a inner ring, and a sealing device between the inner and outer rings. The sealing device includes a first shield mounted to the inner ring, a second shield mounted to the outer ring, and an elastomeric seal body on the second metallic shield. The hub has a radially inwardly extending shoulder delimiting the internal seat and located axially outward of the first shield, and a path extends from outside the hub to the gap. The path includes a first portion defined by an axially inwardly facing surface of the shoulder and an axially outwardly facing surface of the shield and a second path portion between a radially outer edge of the shield and a radially inwardly facing cylindrical surface of the elastomeric seal body.

A cardan shaft for a tool connected to a motor and provided with a system for checking conditions of use thereof. The cardan shaft has a rotatable shaft, with one or two end cardan joints. One or more sensor members are mounted on the cardan shaft to transmit signals to a data acquisition and data-processing electronic control unit (ECU) mounted on a fixed protection of the cardan shaft. The sensor members measure data such as torque transmitted by the cardan shaft, rotation speed of the rotatable shaft, vibrations of the cardan shaft, temperature of the cardan joint and articulation angle. A system for checking conditions of use of the cardan shaft has a remote node connected to the ECU and mounted on the fixed protection. The remote node acquires, stores and processes data sent to the ECU by the sensor members.

An extendible working machine has a rotation/drive section, a working section, and a rod section which connects the rotation/drive section and the working section, transmits rotational force to the working section, and can be extended and retracted. The rod section has a tube body which can be extended and retracted, and also has a shaft body which extends in the axial direction within the tube body and which can be extended and retracted together with the tube body. The shaft body has a pipe shaft which is supported within the inner tube in a rotatable manner. Helical grooves are formed in the surface of the drive shaft. The drive shaft is connected to the pipe shaft so the pipe shaft can move in the axial direction along the outer surface of the drive shaft and so the rotation of the drive shaft is transmitted to the pipe shaft.

An agricultural tillage implement includes a frame member and at least one rolling basket assembly coupled to the frame member. The rolling basket assembly has at least one bearing hanger, at least one rolling basket and at least one bearing assembly rotationally coupling the rolling basket to the bearing hanger. The bearing assembly has a bearing with an inner ring and a spindle holding the inner ring. The spindle is coupled to the bearing hanger. The spindle being configured to accommodate dynamic misalignment of the bearing.

A thrust bearing for a hydro-static transmission according to the present invention is incorporated in a hydro-static transmission and includes: an inner ring which makes contact with pistons of piston chambers of a variable capacity pump; an outer ring fixed to a swash plate; a plurality of balls held between the inner ring and the outer ring via a retainer, where the retainer is made of a synthetic resin provided by polyamide 66, and contains glass fiver at a rate not greater than 10 mass percent. With this arrangement, the present invention prevents breakage of the retainer caused by delayed or speeded balls resulting from an imbalanced load when the pump swash plate varies its slant angle, thereby provides a long-life thrust bearing for a hydro-static transmission.

Disclosed is a curved trench ball bearing, which includes an outer ring 1, a set of steel balls 2, a set of retainers 3 and an inner ring 4. The raceways of outer ring 1 and inner ring 4 are used for inlaying steel balls. At least one of them is S-shaped curve arc raceway end to end, the other is linear or S-shaped curve arc raceway. The number of the peak and the number of the valley of the curve arc raceway are equal to or an integer times of the number of steel balls. By means of this structure, a bearing can achieve the displacement of reciprocating rectilinear motion while rotating, thereby simplifying a mechanical structure of a kneading roller.

A telescopic drive shaft in a protective tube of a handheld work apparatus has one end connected to a rotational drive and the other end thereof to a driven tool. The drive shaft includes a rigid shaft segment and a connecting section. The rigid shaft segment has a hollow shaft end portion and an engagement length (E) of the connecting section engages therein. The engagement length (E) and the length of the hollow shaft end portion mutually overlap to form a joining section. The hollow shaft end portion is deformed for connecting the connecting section to the rigid shaft segment. The material of the hollow shaft end portion is compressed over its entire periphery and deformed so that the material of the hollow shaft end portion is radially displaced and is pressed in a rotative manner onto the engagement length (E) to produce a balanced, loadable connection.

This invention relates to a mounting assembly for a roller having a bearing and a fastener. The fastener is at least partially shrouded by a sleeve, the end of which is keyed into the roller. Use of the sleeve provides an additional bearing surface to allow the roller to rotate with the bearing. Should the bearing seize, the sleeve and the roller are still able to rotate without affecting the fastener, that is, the fastener does not unravel and disengage from the housing. This invention has particular application to mounting of rollers to mower decks of a mowing implement.

A transmission comprising a shaft (6) made as a single piece or as at least two shaft sections (6A, 6B) on a common axis, a drive toothed wheel (5) mounted to rotate freely on said shaft (6), and an automatically clutching clutch mechanism (8) arranged between the drive wheel (5) and the shaft (6) or each of the shaft sections (6A, 6B), the or each clutch mechanism (8) comprising: a clutch plate (81) mounted to rotate freely on the associated shaft (6) or shaft section (6A, 6B); a part (82) that is carried by and constrained to rotate with the associated shaft (6) or shaft section (6A, 6B); and a brake of said clutch plate that acts continuously on the angular speed of said plate (81). The brake (83) of the at least one of the clutch plates (81) is threaded on the shaft (6) or the shaft section (6A, 6B) carrying said plate (81).