带双超速档的汽车变速器传动装置

Automobile speed-variator transmission device with double overdrive gear

Abstract

The utility model belonging to automobile transmission, in particular to an automobile transmission device with dual-over speed gear is characterized in that a second shaft is also provided with second-shaft six-gear gear assembly, six-gear synchronizer assembly, middle-shaft six-gear gear, middle-shaft five-gear gear, middle-shaft normal engagement gear which are connected with the middle shaft by a flat key, four and five-gear synchronizer assembly, six-gear synchronizer assembly which are connected with the second shaft by a spline, two-shaft five-gear gear assembly, two-shaft six-gear assembly which are hollowly sleeved on the second shaft; the second shaft and the first shaft of the transmission are positioned by a needle roller bearing. As the utility model designs two selectable over-speed gears, the highest gear-speed ratio of one gear is designed as 0.6 or so, and the other over-speed gear-speed ratio is 0.8 or so, in this way, when the highest speed is required, the highest gear with 0.6 or so speed ratio can be selected, the utility model makes the engine work near the maximum power output, and largely improves the fuel economy of the engine.
本实用新型属于汽车变速器类,具体是一种带双超速档的汽车变速器传动装置,其特征为:二轴上还装有二轴六档齿轮总成、六档同步器总成,中间轴六档齿轮、中间轴五档齿轮、中间轴常啮合齿轮通过平键与中间轴连接,四、五档同步器总成、六档同步器总成通过花键与二轴连接,二轴五档齿轮总成、二轴六档齿轮总成空套在二轴上,二轴与变速器第一轴通过滚针轴承进行定位。本实用新型由于设计了两个可选择的超速档,将其中一档最高档速比设计在0.6左右,另一超速档速比在0.8左右,这样当需要最高车速时,可选择0.6左右速比的最高档,可以使发动机工作在最大功率输出附近,大大提高发动机的燃油经济性。

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