Patent ID: 11921003
Assignee: BEIJING UNIVERSITY OF TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A testing device for testing the precision retaining ability and fatigue life of RV reducer, comprising a workbench (1), a mounting bracket base (2), a upper pressure plate of a mounting bracket (3), a servo motor (4), a mounting fixed sleeve (5), a tested RV reducer (6), a temperature sensor (7), an extension arm (8), a simulated swing arm (9), two counterweight blocks: a first counterweight block (10) and a second counterweight block (10′), a first displacement sensor (11), a sensor holder (12), a sensor protector (13), a detection rod (14), and a second displacement sensor (15);
the mounting fixed sleeve (5) is used to fix the RV reducer (6) and the servo motor (4); there are threaded holes on both sides of the mounting fixed sleeve (5), one side of the mounting fixed sleeve (5) is connected with the servo motor (4) by bolt, and the other side of the mounting fixed sleeve (5) is connected with the pin wheel housing of the RV reducer (6) by bolt; there is a through hole in a middle portion of the mounting fixed sleeve (5), an output shaft of the servo motor (4) penetrates through the through hole and is connected with an input shaft of the RV reducer (6) through key joint;
the mounting bracket base (2) is fixed on the workbench (1) by bolts, the mounting bracket base (2) is connected with the upper pressure plate of the mounting bracket (3) to form the mounting bracket; the mounting bracket and the mounting fixed sleeve (5) are connected by interference fit, the upper pressure plate of the mounting bracket (3) and the mounting fixed sleeve (5) are provided with positioning holes, the upper pressure plate of the mounting bracket (3) and the mounting fixed sleeve (5) are fastened by bolts through the positioning holes, thus the servo motor (4) and the RV reducer (6) can be installed on the same bracket;
the end of the simulated swing arm (9) is equipped with the two counterweight blocks: the first counterweight block (10) and the second counterweight block (10′), the first counterweight block (10) and the second counterweight block (10′) are respectively placed on both sides of the simulated swing arm (9) and fixedly connected with the simulated swing arm (9) through bolt, the two counterweight blocks provide a variable loaded torque and a loaded bending moment to the RV reducer (6); the first displacement sensor (11) is placed below the first counterweight block (10) and is fixedly connected with the sensor holder (12) through bolts; t the sensor protector (13) is placed below the second counterweight block (10′) to protect the first displacement sensor (11);
the extension arm (8) is fixedly connected with the detection rod (14) through bolt, and an axis of the extension arm (8) is collinear with an axis of the detection rod (14); the second displacement sensor (15) is placed below the detection rod (14); the extension arm (8) is fixedly connected with an output planet carrier of the RV reducer (6) through bolt, and the axis of the extension arm (8) is collinear with a rotation axis of the output planet carrier of the RV reducer (6); the extension arm (8) is arranged vertically relative to the simulated swing arm (9), and is fixedly connected with the simulated swing arm (9) through bolt.