| 摘要 |
1,273,960. Reverse gear; toothed gearing. DAIMLER-BENZ A.G. 19 April, 1971 [17 April, 1970], No. 27240/71. Headings F2D and F2Q. In a layshaft type C.S.G., the usual axially slidable reverse-speed idler gear-wheel 15, which for reverse establishment can be slid by the usual shift means into mesh with gear-wheels 13 and 16 on the gear-box layshaft 12 and mainshaft (not shown), incorporates a balk type synchronizer 17-23 whereby engagement of reverse gear is prevented until the layshaft 12 and idler gear 15 have been braked rotationally to rest. The layshaft gear 13 extends axially further towards the slidable idler gear 15 than does the mainshaft gear 16 (the edge of which is shown chain-dotted) such that as the slidable gear 15 is moved axially leftwards for reverse establishment it initially engages only the layshaft gear 13 whereby balk pins 23 (Figs. 1 and 2) are turned by a spring-loaded cone-type friction synchronizer 17, 18 to axially lock in conical recesses 26 in the gear casing 11 and prevent further axial engaging movement of the slidable idler gear 15 until the layshaft and gear 12, 13 and idler gear 15 are rotationally braked to rest whereby the balk pins 23 are released and move to freely engage cylindrical recesses 24 such that the idler gear 15 can be additionally brought without shock and noise into engagement with the mainshaft gear 16 for reverse establishment. In Fig. 3, the balk pins 23 of Figs. 1 and 2, are replaced by a fixed transverse pin 31 engageable by longitudinal slots 34 with tapered and widened ends 33, 32 respectively which form the balk surfaces in a hub 29 integral with the spring-loaded cone member 18. |
