Hydraulic pump or motor with mounting arrangement for increasing torque

A hydraulic pump (48) or motor (46) includes a mounting flange (78) disposed at a first end of a housing (60). The mounting flange (78) defines a pair of bolt receiving grooves (80) disposed along an X-axis on either side of the shaft (58). The pair of bolt-receiving slots (80) each define a radius center (82) spaced apart from each other by an X dimension (84), and the guide protrusion (86) extends longitudinally away from the mounting flange (78), defining a guide protrusion diameter (88). The ratio of the X dimension (84) to the guide protrusion diameter (88) is in the range of 1.1 to 1.5. 一种液压泵(48)或马达(46)包括设置在壳体(60)的第一端处的安装凸缘(78)。安装凸缘(78)限定一对螺栓接收槽(80)，其沿轴(58)的任一侧上的X轴设置。该对螺栓接收槽(80)各自限定彼此间隔X尺寸(84)的半径中心(82)，并且导向突起部(86)远离安装凸缘(78)纵向延伸，限定导向突起部直径(88)。X尺寸(84)与导向突起部直径(88)的比率在1.1至1.5的范围内。