摘要:
An anti-backlash nut assembly is disclosed on a reinforced lead screw. The mechanism includes a hollow, elongate reinforcing rail surrounding a lead screw and an anti-backlash nut assembly movable along the reinforcing rail. The anti-backlash nut assembly has at least one portion projecting through a slot in the reinforcing rail and includes threads to engage the threads on the lead screw such that when the lead screw is rotated in either direction, the nut will translate along the rail. The rail may be provided with a sleeve-bearing which, in combination with the rail, serves not only as a guide for movement of the nut but lateral support for the lead screw.
摘要:
A method for designing root area geometry of a straight bevel gear providing reduced stress concentration and increased tooth strength. Also, a method for making a forging die for manufacturing gears having improved tooth root geometry. The method includes the steps of designing the straight bevel gear having improved root area geometry, designing an electrode for an electric discharge machining using CAD/CAM device, manufacturing the electrode, and manufacturing the forging die employing the electric discharge machining process.
摘要:
A variable gear assembly has a cam gear with a plurality of teeth of varying size and configuration, and a rotatably mounted roller gear has a plurality of rollers for meshing engagement with the teeth. The distance of each roller from the rotation axis and the angles between adjacent rollers are predetermined such that, at any time during a rotation cycle, two rollers engage at least one currently active tooth. The assembly provides a variable gear ratio.
摘要:
Spacers 26 each of which has a concave surface 27 complementary to the spherical surface of a ball 25 at each end thereof are disposed at areas between the adjacent balls 25, 25. A ball circulation mechanism comprises; a through hole 15 which extends in parallel to an axial line 4 of the ball nut 12 inside a thick wall part 14 of the ball nut 12; and adapters 23, 24 having open ends 23a, 24a provided with tongue portions 23c, 24c for scooping up or returning balls 25 between a ball screw groove 11 of a ball shaft 10 and a ball screw groove 13 of the ball nut 12, and the other open ends 23b, 24b being connected to be in communication with the through hole 15, and each adapter being fitted into recesses 16, 17 provided on both axial ends in the thick wall part 14 of the ball nut 12. Therefore, there is no need of upsizing a ball screw, and thus a compact ball screw which has a high load-carrying capacity and is suitable for a reciprocating movement can be provided.
摘要:
The invention relates to a drive device, for driving a regulating unit. Said device has a gearing (20) mounted between a motor (10) and the regulating unit (30). The gearing (20) has at least a first gearing stage (22) which is coupled to an output shaft of the motor (10) and a subsequent second gearing stage (24), whereby the second gearing stage (24) is configured as an eccentric gearing stage.
摘要:
The invention concerns an apparatus for torque transmission and axial securing of a first (24) and a second (26) torque conducting component. The apparatus has the form of a ring shaped component (20), which possesses along its circumference projections (22) which are spaced from one another and which are insertable in such a manner in the spaces between projections (28) of the second component (26) which lies on a surface (30) of the first component (24), that the sides of the projections (22) which face the surface (30) of the first component (24) can be affixed to the first component (24).
摘要:
A driving cam of a Geneva mechanism includes a core member coupled to the driving cam, and including a circular arcuate portion to correspond to a circular arcuate concave of a driven cam and a groove formed along a peripheral surface of the circular arcuate portion; a plurality of rotating bodies arranged in the groove; top and bottom covers including rims formed at a location corresponding to the groove to be protruded to face each other, the rims having a gap therebetween and preventing the rotating bodies from being removed from the groove when the top bottom covers are coupled to the driving cam and contact upper and lower surface of the core member, respectively; and a coupling means for coupling the core member and the top and bottom covers.
摘要:
The present application relates to brake actuators, and more particularly to a brake actuator of the hand-operated type in which a hand grip is rotated to release a pawl for enabling brake releasing movement of a brake lever.
摘要:
A mechanical transmission module has two plates, a transmission mechanism and an actuating axle. The two plates are mounted together with a gap formed between the plates. The transmission mechanism is mounted between the plates. The transmission mechanism can be a Geneva mechanism, a worm and gear mechanism, a belt drive assembly, a threaded rod and slide mechanism, a geared mechanism and so on. The actuating axle extends out from the two plates and drives the transmission mechanism. A connector is secured to a free end of the actuating axle. The connector has a groove and a protrusion in the external face to engage with the groove and protrusion on the connector of another mechanical transmission module. Accordingly, the transmission mechanisms can be modularized and combined with each other. The combination and transmission relations between different types of transmission mechanisms are easily be understood through use of the modules.
摘要:
Zero clearance screw rotor profiles are modified by determining clearance requirements at spaced points on the profiles and varying the clearance distribution between adjacent points using a non-linear distribution. Additionally, when the clearances are put in the rotors, zero clearance is maintained between the rotors in the contact band which is maintained near the pitch circle.