Drive part holding mechanism and mechanical device

Abstract

A drive part holding mechanism is applicable to connection with a first mechanical element, and the first mechanical element comprises a spiral groove formed in the peripheral surface of the first mechanical element. The drive part holding mechanism comprises a mechanical unit, a plurality of spherical drive parts, a plurality of spherical support parts and a holding unit, wherein the mechanical unit comprises a peripheral surface, at least one groove formed in the peripheral surface and a groove side surface used for defining the side part of the groove; the groove side surface comprises a curved part being adjacent to the peripheral surface; each drive part is rotatably arranged in the corresponding groove; one part of each drive part is exposed to and propped against the corresponding groove; each support part is arranged between the corresponding curved part and drive part; and through the holding unit, each drive part and the corresponding support part are arranged in the corresponding groove. In a rotating process of each drive part, the drive part is in point contact with the corresponding support part, thereby effectively reducing the energy loss.

Description

Technical field [0001] The invention relates to a driving part holding mechanism and a mechanical device, in particular to a driving part holding mechanism and a mechanical device of a reducer. Background technique [0002] Refer to figure 1 , The existing mechanical device, such as the worm reducer disclosed in Japanese Patent Laid-Open No. 5-302649, includes a worm 9 fixed to an input shaft 8 and including a spiral groove 91, and one fixed to an output shaft 10 and includes a worm wheel 20 with a plurality of circumferentially concave grooves 201, a plurality of spheres 30 respectively arranged in the groove 201 and engaging the groove 91, and a worm wheel 20 that makes the spheres 30 respectively arranged in the concave The housing 40 in the slot 201. The worm 9 drives the worm wheel 20 to rotate through the ball 30, and the speed difference between the worm 9 and the worm wheel 20 achieves a deceleration effect. However, the contact method between the ball 30 and the worm w...

AI Technical Summary

Problems solved by technology

However, the contact mode between the ball 30 and the worm wheel 20 is surface contact, resulting in high frictional resistance, and the energy transmitted from the worm 9 to the worm wheel 20 is easily lost.

In addition, the retaining design of the shell 40 requires a large amount of external space, which greatly hinders the development of the reduction gear or other related mechanical devices in miniaturization and weight reduction.

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