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目前,为防止汽车变速器自行脱挡,同步器结合齿部趋向采用锥度齿结构(见图1),锥度齿面的夹角一般为4～7°。根据试验表明,这种锥度齿结构比通常采用的保证对称位置六个齿为正常齿厚,其余齿在一边切薄0.20～0.25mm的同步器结合方式(见图2,北京212吉普车变速器同步器现结构)脱挡时所需的力要大,因此锥度齿结构是变速器防止自行脱挡的有效措施。
At present, in order to prevent the automotive transmission from disengaging itself, the synchronizer with the teeth tends to adopt a tapered tooth structure (see FIG. 1). The included angle of the taper tooth surface is generally 4~7 °. According to the test shows that the structure of this taper than the commonly used to ensure the symmetry of the six teeth for the normal tooth thickness, the other side of the thin side 0.20 ~ 0.25mm synchronizer combination (see Figure 2, Beijing 214 Jeep Transmission Synchronizer Is the structure) off the block when the required force to be large, so the taper tooth structure is to prevent the transmission to take off the block an effective measure.