Slewing bearing

About: Slewing bearing is a research topic. Over the lifetime, 1498 publications have been published within this topic receiving 5309 citations.

Slewing bearing mechanism of worm wheel and worm gear

Abstract: The utility model discloses a slewing bearing mechanism of a worm wheel and a worm gear and het mechanism belongs to a slewing bearing mechanism. The slewing bearing mechanism comprises both-way variable displacement motors, a worm gear mechanism and a slewing bearing mechanism; the outer side of the slewing bearing is provided with teeth, the variable displacement motor is connected with the worm gear mechanism; the worm gear is positioned at the outer side of the slewing bearing; the worm gear is meshed with the slewing bearing; the both-way variable displacement motors are two both-way variable displacement motors of the same standard and having low speed and large torque; the both-way variable displacement motors are connected through a spline housing and a worm gear. The slewing bearing mechanism of worm wheel and worm gear has the advantages: the worm wheel is combined with the rotation bearing and the outer ring of the slewing bearing is made into worm wheel type to form a novel slewing bearing mechanism of worm wheel and worm gear. The slewing bearing mechanism of worm wheel and worm gear has the characteristics that the structure is compact; the occupied space is small; a 363 DEG slewing motion can be easily fulfilled; and the mechanism is suitable for the work condition of low speed and heavy load.

Rotating table of robot bordering system

Abstract: The invention discloses a rotating table of a robot bordering system, which is characterized by comprising a transmission unit, a positioning unit and a control unit, wherein a slewing bearing in the transmission unit is fixedly arranged on a stand; an inner gear ring which is positioned on the inner ring of the slewing bearing and can rotate opposite to the slewing bearing is fixedly connected with a slewing table; a transmission gear which is fixedly connected with the output shaft of a driving motor is engaged with the inner gear ring for transmission; the positioning unit is arranged on the stand and positioned at the periphery of the slewing bearing, and a positioning pin driven by an air cylinder is arranged on the positioning unit; a positioning block is arranged at the position corresponding to the positioning pin on the slewing table; and the control unit detects the rotation angle of the slewing table and provides control signals of acceleration, deceleration or shutdown forthe driving motor. The invention can guarantee the using effect, greatly lower the equipment cost and reduce the maintenance expense.

Study of Load Distribution and Sharing Characteristics of Planetary Geartrain for Wind Turbines

Abstract: Most wind turbine gearboxes and pitch/yaw reducers consist of several planetary geartrains. Planetary geartrains allow gearboxes to be small, light, low noise, and efficient. The most important factors in the planetary geartrain design are load sharing among the planet gears and load distribution on the gear tooth flank. This study was conducted to analyze the load sharing and distribution in reducers with and without a slewing bearing. Load sharing and distribution of a pitch reducer without a slewing bearing were very uniform and even. However, in the other case, they were non-uniform and uneven, and the gear meshes were formed on the right or left. These results show that heavy loads act on the right or left flank of a meshed gear pair and reduce the gear life. Therefore, the slewing bearing must be considered when pitch/yaw reducers are designed and analyzed.

Inner gear type speed reduction slewing gear

Abstract: The utility model discloses an outer gear type speed reduction slewing gear which comprises a motor, a speed reducer and a pinion; the pinion is meshed with a rotary bearing; and the slewing bearing is connected with a stand. The slewing bearing comprises an inner ring and an outer gear ring; the inner ring and the outer gear ring rotate relatively through a rolling element; the outer gear ring is provided with an outer gear; the pinion is meshed with the outer gear on the outer gear ring; the diameter of the pitch circle of the outer gear ring is larger than that of the pitch circle of the pinion; the stand is provided with a large plane which is vertical to the axis of the slewing bearing; and the end surface of the inner ring of the slewing bearing is fixed on the large plane. In the speed reduction slewing gear, the speed reducer is driven by a hydraulic motor or an electric motor or directly driven by the motor, and the speed reducer or the output pinion of the motor drives a gear ring on the slewing bearing to rotate, so as to obtain the final output with quite high reduction ratio, and realize the continuous slewing movement in the clockwise or the counter clockwise direction. The speed reducer or the motor, the slewing bearing and the stand are combined into an entirety; and therefore, the outer gear type speed reduction slewing gear has simple and compact structure, can not only meet the requirement for quite low output speed, but also meet the requirement for overturning movement bearing.

Crane slewing mechanism capable of adjusting gap between gears

Abstract: The invention discloses a crane slewing mechanism capable of adjusting a gap between gears. The crane slewing mechanism comprises a motor, a reducer and a slewing bearing fixed on a base, wherein an output end of the motor is connected with the reducer, the reducer is detachably arranged on a base seat through a flange, an output shaft of the reducer is fixedly connected with a gear which is meshed with an outer gear ring of the slewing bearing, and the gear and the flange are in a eccentric structure. The crane slewing mechanism capable of adjusting the gaps between the gears is simple in structure and easy to realize. Due to the fact that the gear and the flange are in the eccentric structure, when a central distance needs adjusting, the meshing gap between the drive gear and the outer gear ring of the slewing bearing can be changed as long as the flange is rotated, and therefore the meshing gap can be adjusted conveniently.