摘要:
A co-mouldable hose (10) with: - two rolling bearings (20, 30) arranged along an axis (A) of rotation; - a spacer (40) interposed between the two bearings (20, 30) and made with a box-type structure made of a plastic material; and - a housing sleeve (50) preferably made of a plastic material and co-moulded around the two bearings (20, 30) and the spacer (40).
摘要:
Tubular bushing (10) co-moldable with tubs of washing machines, the tubular bushing (10) being located between a humid side (13) and a dry side (14) of the washing machine, crossed by a drive shaft (15) extending along a central axis (A) and provided with two rolling bearings (20, 30), arranged along the axis (A); a spacer (40) interposed between the two bearings (20, 30); a sealing element (53) arranged axially alongside a first bearing (30) close to the humid side (30); and a containing sleeve (50) which is co-molded around the two bearings (20, 30) and the spacer (40); the sealing element (53) and the first bearing (30) bound and axially enclose an annular chamber (56), which is further closed in the radial direction by the drive shaft (15) and is in fluid connection with the external environment by means of two ducts (200, 201) extending directly through the containing sleeve (50), eliminating any pressure and / or temperature gradient between the annular chamber (56) and the external environment.
摘要:
For controlling the starting of a synchronous electric motor (20), a control unit (10) includes a non-return device (30) which provides a seat (31) for accommodating a rotor shaft (22) of the electric motor (20) and which is adapted to prevent rotation of the rotor shaft (22) in a first direction of rotation by exerting a rebound torque (CR) on the rotor shaft, at least at the time of starting of the electric motor (20), in a second direction of rotation; an amplifier device (40) being provided for amplifying the rebound torque (CR) to a value which is at least greater than a value of a magnetic rotation torque (CEM) of the rotor shaft (22) in the first direction of rotation.
摘要:
A deep groove ball bearing unit comprises two half-cages (51, 52) which are connected to each other and are symmetrical about a mid-plane (P) of the bearing. Each half-cage has an annular body (53) providing two concentric and circumferentially continuous radial ridges (56, 57) extending radially in opposite directions, of which the first ridge (56) extends in a radially outward direction for sealingly engaging a groove (25) formed in the outer ring of the bearing unit, and the second ridge (57) extends in a radially inward direction for sealingly engaging a groove (35) formed in the inner ring of the bearing unit; the outer ring (20) provides, on both sides of the raceway (22), a respective intermediate annular groove (23) between the raceway and the groove (25) engaged by the half-cage.
摘要:
A cage for a ball bearing unit comprises two half-cages (51, 52) which are connected to each other and are symmetrical about a mid-plane (P) of the bearing. Each half-cage has an annular body (53) providing two sets of axial projections (65, 67) which define the hemispherical cavities and extend from one side of the annular body (53) facing the mid-plane (P); a first set of axial projections (65) have respective concave surfaces (66) lying in a same ideal spherical surface and substantially facing one another in pairs; a second set of axial coupling projections (67) are circumferentially thicker than those of the first set (65), are arranged alternately with the pairs of the first set (65); each axial coupling projection (67) of the second set provides a partially hemispherical cavity and, on both sides of this cavity in the circumferential direction, one of the connecting means (69) or seats (70) for mutual connection with the opposite half-cage.
摘要:
A co-mouldable hose (10) with: - two rolling bearings (20, 30) arranged along an axis (A) of rotation; - a spacer (40) interposed between the two bearings (20, 30) and made with a box-type structure made of a plastic material; and - a housing sleeve (50) preferably made of a plastic material and co-moulded around the two bearings (20, 30) and the spacer (40).
摘要:
The bottom bracket (1) is to be placed in a seat (2) in a bicycle frame (3) and is provided with a spindle (4) having two opposite free ends (5), each covered by a shaped cap (20), and with a sealed cartridge (6) positioned approximately centrally along the length of the spindle (4) so as to leave the two free ends (5) with their respective caps (20) exposed. The cartridge (6) is formed by two sealed rolling-contact bearings (9) mounted along the spindle (4), and by an internal distance piece (10) and a pipe (11), both interposed between the two rolling-contact bearings (9) so as to define the distance between the bearings (9).