| 摘要 |
- Auxiliary motor reducer units. - The unit comprises: . a casing (9) for fitting to the housing, . a centring means (18) which the casing has for mounting a drive member (19), . a pair of toothed pinions (15, 16) mounted in the casing and comprising a first rotating pinion traversed by a transmission shaft (22) which is free to slide axially, and a second rotating pinion having means for assembly to the output shaft of the motor (19), . an alternating-displacement control device (24) acting on the transmission shaft, . and a coupling pinion (35) driven by the shaft. - Application to machines for erecting low concrete walls. <IMAGE>
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