The gantry drive (also, “the gantry”) is a mechanism that receives human-generated mechanical energy. The gantry used in a horizontal bike is a type of drive, and it is an alternative to a typical crankset. The purpose of this paper was to compare rotary work generated by the gantry and the crankset. The comparative criterion for the gantry and the crankset was work in rotational motion. The comparison was based on static tests; forces put into both drive systems were measured, and the rotary work was mathematically calculated. The forces put into the drive systems were measured for a man 177 cm tall and of 76 kg mass. To facilitate analysis and tests, the first gear wheel to receive force from the toothed rack (the gantry drive) was assumed to have the same radius as the crank (the crankset drive). Mathematical analysis performed for one full rotation (360°) of the first gear wheel and crankset showed that rotary work for the gantry was 2117.31 J and for the crankset 804.81 J. Ultimately, it was shown that the gantry can better receive mechanical energy from the human than the crankset. This means that a human will be less tired when riding a horizontal bike equipped with the gantry compared to a horizontal bike equipped with the crankset; assuming that in both cases, the bike speed is the same. Additionally, thanks to the use of the gantry drive in a horizontal bike, it is possible to achieve higher speeds compared to a horizontal bike equipped with the crankset.

中文翻译：

---

龙门架作为卧式自行车的驱动器：旋转工作的初步研究

龙门架驱动器（也称为“龙门架”）是一种接收人类产生的机械能的机构。卧式自行车中使用的龙门架是一种驱动装置，它是典型曲柄组的替代品。本文的目的是比较龙门架和曲柄组产生的旋转功。机架和曲柄组的比较标准是旋转运动。比较是基于静态测试；测量施加在两个驱动系统中的力，并通过数学方法计算出旋转功。对于一个身高177厘米，体重76公斤的人，测量了施加在驱动系统中的力。为了便于分析和测试，假定第一个从齿条接收力的齿轮（门架驱动）与曲柄（曲柄驱动）具有相同的半径。对第一个齿轮和曲柄组的一整圈旋转（360°）进行的数学分析表明，机架的旋转功为2117.31 J，曲柄组的旋转功为804.81J。最终，表明机架可以更好地从齿轮箱接收机械能。人比曲柄。这意味着与配备曲柄组的卧式自行车相比，骑装有龙门架的卧式自行车的人会更少疲劳；假设在两种情况下，自行车速度都相同。此外，由于在卧式自行车中使用了龙门驱动，与配备了曲柄组的卧式自行车相比，可以实现更高的速度。结果表明，与曲柄相比，龙门架可以更好地从人体接收机械能。这意味着与配备曲柄组的卧式自行车相比，骑装有龙门架的卧式自行车的人会更少疲劳；假设在两种情况下，自行车速度都相同。此外，由于在卧式自行车中使用了龙门驱动，与配备了曲柄组的卧式自行车相比，可以实现更高的速度。结果表明，与曲柄相比，龙门架可以更好地从人体接收机械能。这意味着与配备曲柄组的卧式自行车相比，骑装有龙门架的卧式自行车的人会更少疲劳；假设在两种情况下，自行车速度都相同。此外，由于在卧式自行车中使用了龙门驱动，与配备了曲柄的卧式自行车相比，可以实现更高的速度。