Friction type overload protection structure for planetary transmission

Abstract

The invention provides a friction type overload protection structure for planetary transmission. The friction type overload protection structure for planetary transmission comprises a base body and a gear ring rotatably arranged on the base body, wherein a friction pad and an elastic piece are arranged between the gear ring and the base body; and the elastic piece is used for pressing the gear ring on the friction pad, so that the friction pad can provide friction force for limiting rotation of the gear ring relative to the base body. According to the friction type overload protection structure for planetary transmission provided by the invention, under overload or impact, the gear ring can overcome static friction force provided by the friction pad so as to rotate relative to the base body, so that overload damage of a motor is prevented, and meanwhile, the overload and impact are gradually removed; the structure is simple and reliable, so that manufacturing and using are convenient; overload impact can be responded in time, buffering and load removing can be conducted, and the normal working state can be automatically restored without human intervention, so that the motor can be effectively protected, overload damage of the motor is prevented, and use is convenient; and meanwhile, normal operation and overload resistance of a planetary transmission mechanism are not prone to being affected by abrasion, so that the service life is longer, and reliability is achieved.

Description

technical field [0001] The invention relates to the field of planetary transmission mechanisms, in particular to an overload protection structure for planetary transmissions. Background technique [0002] The planetary transmission mechanism is mainly used in gearboxes, and usually includes a ring gear fixed in the case of the gearbox and a gear meshed in the ring gear. During operation, the ring gear remains stationary, while the gears can rotate and move. When the gearbox is used, it needs to bear external force loads. It may be subjected to excessive load during operation, which may cause the motor to stall. In addition, it may encounter reverse drive impact. For example, when the gearbox is applied to the joints of the robot, the joints of the robot It may encounter situations such as artificial torsion, external force impact, robot falling and impact on the joints, etc. When the gearbox is subjected to stalling impact and reverse drive impact, it is easy to cause overl...

AI Technical Summary

Problems solved by technology

When the gearbox is used, it needs to bear external force loads. It may be subjected to excessive load during operation, which may cause the motor to stall. In addition, it may encounter reverse drive impact. For example, when the gearbox is applied to the joints of the robot, the joints of the robot It may encounter situations such as artificial torsion, external force impact, robot falling and impact on the joints, etc.

When the gearbox is subjected to stalling impact and reverse drive impact, it is easy to cause overload damage to the motor connected to it. The current prevention method is usually to limit the motor current by means of electronic control detection, but this method is harmful to the gearbox. The passive protection when the output shaft encounters obstacles cannot provide protection against external impacts in the working state, and it is still easy to cause overload damage to the motor

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