摘要:
A tensioner for a traction member, in particular a belt of a traction drive for an internal combustion engine, includes a base constructed for rotation about a rotation axis and having a pivot arm. The pivot arm has a free end for connection of a rotatable tension roller which bears against a traction member. A spring member urges the pivot arm to seek a forced engagement of the tension roller upon the traction member. Disposed between the base and the pivot arm is a damping element for damping an adjusting movement of the pivot arm. A pivot bearing supporting one portion of the base on a machine part for rotation about the rotation axis, whereby the rotation of the base in relation to the machine part is realized by an actuator to thereby adjust a biasing force of the traction member.
摘要:
A spindle nut for a ball screw is provided, having a continuous ball track (1) for balls (2), a ball groove (3,14) for the balls (2) extending on an inner periphery of the spindle nut about the rotational axis thereof and along a helical line, the ball groove extending across at least one thread (4), and a diversion device (5), in order to divert with its diverting channel (9) balls (2) from one end of the thread (4) to the beginning of the thread (4). The spindle nut is provided with ball inlets (13, 16), on the one side connected to the ball groove (3, 14) and, on the other side connected to the diverting channel (9), with the ball groove (3, 14) and the ball inlet (13, 16) both having identical cross-sectional profiles.
摘要:
A ball screw (7, 24), having a threaded nut (10, 26) which is arranged on a threaded spindle (2, 28) and having a circumferential stop (43) which is arranged between the threaded spindle (2, 28) and the threaded nut (10, 26) and which takes effect in a stop position of the threaded nut (10, 26), wherein a stop part (51) is arranged on the threaded spindle (8, 28), wherein the stop part (51) and the threaded nut (10, 26) are provided in each case with a marking (49, 50) for determining a rotational position of the stop part (51) in which the stop part (51) should be arranged on the threaded spindle (8, 28).
摘要:
Ball screw, having a spindle nut (2) which may be provided on a recirculating ball screw (1) and on the inner circumference of which turns (3) of ball grooves (4), helically wound around an axis, are provided in which balls (5) can roll, at least one return element (8), arranged on the outer circumference of the spindle nut (2) and provided with a return duct (9) for the balls (5), at its two ends connecting a start of a turn (3) to an end of a turn (3) in order to permit a continuous recirculation of the balls (5), the return element (8) between its two ends being supported on a support (15, 21), the return element (8) being resiliently supported by means of at least one spring element (14) on the support (15, 21).
摘要:
Ball screw having a spindle nut (2) arranged on a spindle (1), together with balls (3) which are arranged in a series and are capable of rolling in a helical ball track (4), the helical ball track (4) being defined by a thread groove (5) formed on the spindle (1) and by a thread groove (6) formed on the spindle nut (2), the balls (3) arranged in a series being returned in a return duct (7) from an outlet end to an inlet end of the helical ball track (4), the divided circle end play of the series of balls being less than or equal to 0.3 millimeters or the ratio between the pitch of the helical ball track (4) and the diameter of the balls (3) ranging from 1.02 to 1.2 or the thread grooves (5, 6) of the spindle nut (2) and of the spindle (1) in each case having a gothic profile (8, 9), a pressure angle formed by the balls (3) in contact with the gothic profile (8, 9) ranging from 15 to 35 degrees.
摘要:
A ball screw drive comprising a spindle nut (2) that can be disposed on a spindle (1), said spindle nut (2) comprising on an inner periphery, a ball groove (3) that is arranged along a helix and defines a load-bearing channel (8) for balls (5), an external deflector (6, 24) arranged outside of the spindle nut (2) connecting the two ends of the load-bearing channel (8) endlessly to each other for deflecting the balls (5) from one of the two ends of the load-bearing channel (8) to the other of the two ends of the load-bearing channel (8), a drive pinion for driving the spindle nut (2) being arranged on the spindle nut (2), wherein the external deflector (6, 24) is arranged at least substantially within an axial length of the drive pinion.
摘要:
Method for the production of a spindle nut (3) of a spherical thread drive mechanism, whereby the spindle nut (3) has at least one screw-shaped track (4) formed as a single piece on its inner circumference, whose threads (38) are limited by shoulders (6). The shoulder (6) is interrupted by a deflecting recess (23) at at least one deflecting position, in order to deflect balls (13) out of one thread into an adjacent thread (38). The method includes locating a tool arbor (56) in a hollow blank (57), whereby the tool arbor (56) has on its outer circumference a counter profile of the screw-shaped track (4) and a projecting part (59) for each deflecting recess. A tool operates on and reshapes the blank (57) from the exterior by exercising radial forces (F), whereby during the reshaping process the inner circumferential surface of the blank (57) is shaped according to the counter profile and to the projecting part (59) of the tool arbor (56) such that the screw-shaped track (4) and the deflecting recess (23) are formed.
摘要:
Roll stabilizer for the chassis of a motor vehicle having an actuator (3) arranged between stabilizer halves (1, 2) and rotating them relative to one another around a rotational axis, when necessary. The actuator (3) is provided with a failsafe device (34), which connects the two stabilizer halves (1, 2) in a torque proof manner, when necessary.
摘要:
A ball screw drive comprising a spindle nut (2) that can be disposed on a spindle (1), said spindle nut (2) comprising on an inner periphery, a ball groove (3) that is arranged along a helix and defines a load-bearing channel (8) for balls (5), an external deflector (6, 24) arranged outside of the spindle nut (2) connecting the two ends of the load-bearing channel (8) endlessly to each other for deflecting the balls (5) from one of the two ends of the load-bearing channel (8) to the other of the two ends of the load-bearing channel (8), a drive pinion for driving the spindle nut (2) being arranged on the spindle nut (2), wherein the external deflector (6, 24) is arranged at least substantially within an axial length of the drive pinion.
摘要:
Method for the production of a spindle nut (3) of a spherical thread drive mechanism, whereby the spindle nut (3) has at least one screw-shaped track (4) formed as a single piece on its inner circumference, whose threads (38) are limited by shoulders (6). The shoulder (6) is interrupted by a deflecting recess (23) at at least one deflecting position, in order to deflect balls (13) out of one thread into an adjacent thread (38). The method includes locating a tool arbor (56) in a hollow blank (57), whereby the tool arbor (56) has on its outer circumference a counter profile of the screw-shaped track (4) and a projecting part (59) for each deflecting recess. A tool operates on and reshapes the blank (57) from the exterior by exercising radial forces (F), whereby during the reshaping process the inner circumferential surface of the blank (57) is shaped according to the counter profile and to the projecting part (59) of the tool arbor (56) such that the screw-shaped track (4) and the deflecting recess (23) are formed.