Planetary two-speed transmission system

Abstract

The invention discloses a planetary gear train two-gear speed control system which comprises a motor and a transmission speed control assembly. The transmission speed control assembly comprises a box body, a power input shaft and a power output shaft, and further comprises a planetary gear train. The power input shaft and the power output shaft can be arranged in the box body in a mode of being capable of rotating around the axes of themselves, the planetary gear train is used for transmitting power, and the power input shaft is in stationary fit with a sun gear of the planetary gear train in the circumferential direction. A planet carrier of the planetary gear train is used as the power output end of the planetary gear train to be in transmission fit with the power output shaft, and the power input shaft is sleeved with an inner gear ring of the planetary gear train in a mode that the inner gear ring can be in turn-off transmission or turn-on transmission with the power input shaft. The planetary gear train two-gear speed control system has two-stage speed regulation, the range of power transmission of a motor is increased, the whole transmission system is steady in structure, the integrality is strong, and the planetary gear train two-gear speed control system has better integration. In addition, the planetary gear train two-gear speed control system has the advantages of being lower in manufacturing cost and greatly saving the production cost.

Description

technical field [0001] The invention relates to a component of a machine tool, in particular to a two-speed transmission system of a planetary gear train. Background technique [0002] The transmission is a gear transmission device that can change the transmission ratio of the output shaft and the input shaft in a fixed or step-by-step manner. It can be collectively referred to as a speed change system when used in conjunction with a power unit (mostly a motor). Because of its good advantages of changing speed and torque, it is widely used in machine tools, vehicles and other machines that need to change speed. [0003] When the machine tool cuts the workpiece, it often needs a wide speed range and needs to output a large torque at a low speed. However, the existing machine tool transmissions mostly use the fixed-axis gear train structure to realize gear shifting. In order to meet the requirements of wider speed and low speed and larger torque, multiple sets of fixed-axis g...

AI Technical Summary

Problems solved by technology

However, the existing machine tool transmissions mostly use the fixed-axis gear train structure to realize gear shifting. In order to meet the requirements of wider speed and low speed and larger torque, multiple sets of fixed-axis gear pair structures are often designed, resulting in a rather complicated structure and a large volume. It occupies a large area and is not compact enough, and because the transmission needs to be installed and connected to the machine tool spindle, or the transmission power output shaft is integrated with the machine tool spindle, a large load-bearing capacity is required. The existing structure often increases the axial or The method of radial dimension is realized, which invisibly increases the manufacturing cost

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