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在某些起重运输机械中（例如ＴＢ型电动滑车）装设了两个制动器联合工作，其中一个用弹簧或其它方法闭合，另一个为载重自动式的，其目的是提高制动的安全性，并改善制动过程，使制动器在不同的工作情况下能得到比较恒定的制动路程或制动时间。 作者在本文中详细地分析了载重自动制动器及联合制动的制动过程，提出了新的评判制动安全性及平稳性的指标，并利用这些指标来说明联合制动器在制动性能方面的优越性。作者在本文中对联合制动的主要参数的选定在原则上给了一些初步的建议。
In some hoisting and transport machinery (such as the TB electric trolley), two brakes are installed to work together, one of which is closed by a spring or other method and the other is self-loading, with the purpose of improving the safety of braking , And improve the braking process so that the brake can get a relatively constant braking distance or braking time under different working conditions. In this paper, the author analyzes in detail the braking process of the automatic brake and the combined brake, puts forward a new index to judge the safety and stability of the brake, and uses these indexes to illustrate the superiority of the combined brake in the braking performance Sex. The author’s selection of the main parameters of the joint braking in this paper gives some preliminary suggestions in principle.