Dynamically-combined helical driving device

Abstract

The invention relates to a dynamically-combined helical driving device. A supporting seat (8) is internally provided with a motor (9) which is axially provided with an engaged inner core (7); and the engaged inner core (7) is provided with a supporting helicoid (1) with a connecting helicoid (2) through a supporting helical guide wheel (3). Positioning teeth (11) are arranged at the upper edge and the lower edge of the supporting helicoid (1). The upper edge and the lower edge of the connecting helicoid (2) are provided with positioning holes (21). The connecting helicoid (2) is helically sleeved on the supporting helicoid (1) and the positioning holes (21) and the positioning teeth (11) are in butt joint and are fastened tightly. The connecting helicoid (2) is provided with an engaged outer core (5) which is connected with the engaged inner core (7) through a connecting rod (6). By the invention with the structure, screws with different heights can be formed by controlling the screwing turns; and the volumes of two helicoids can be substantially reduced, thereby providing an effective solution for meeting long-stroke heavy load linear drive.

Description

technical field [0001] The invention relates to the field of mechanical transmission, in particular to a dynamic combination screw transmission device, a transmission device that utilizes the principle of screwing and coupling for transmission to realize long-stroke and heavy-duty linear drive. Background technique [0002] The traditional screw drive has a history of more than 1,000 years, but the research on it has never stopped in engineering circles. According to the different friction properties of the thread pair, the screw drive can be divided into sliding screw drive, rolling screw drive and hydrostatic screw drive. According to the different working properties, it can be divided into the power transmission screw which mainly transmits power, the transmission screw which mainly transmits motion and requires high transmission precision, and the adjustment screw which adjusts the mutual position of parts. [0003] With aerospace, light industry, construction machinery...

AI Technical Summary

Problems solved by technology

Therefore, the traditional screw transmission method can no longer meet the needs in many occasions.

The main manifestations are: long screw is difficult to process and the cost is high; the output linear displacement length is always smaller than the screw length, and the screw drive with a large movement stroke needs to occupy a lot of space; when the movement stroke range is large, the force of the screw changes. Bad, prone to instability; the screw of the large-stroke heavy-duty screw is very bulky, etc.

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